:root {
  --ink: #21332e;
  --ink-soft: #5b6b66;
  --paper: #fffdf8;
  --canvas: #f4efe5;
  --green: #356859;
  --green-light: #dcebe2;
  --coral: #da6d58;
  --coral-light: #f8dfd7;
  --yellow: #e2b84f;
  --yellow-light: #f8ebbd;
  --blue: #617fae;
  --blue-light: #dce6f4;
  --line: rgba(33, 51, 46, 0.12);
  --shadow: 0 20px 50px rgba(61, 69, 58, 0.1);
  --shadow-hover: 0 24px 60px rgba(61, 69, 58, 0.16);
  --font-sans:
    "PingFang TC",
    "Noto Sans TC",
    "Microsoft JhengHei",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  --font-display:
    "SF Pro Display",
    "PingFang TC",
    "Noto Sans TC",
    "Microsoft JhengHei",
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  --font-lesson-display:
    "Songti TC",
    "STSong",
    "Noto Serif TC",
    serif;
  --lesson-section-gap: 22px;
  --lesson-radius-hero: 30px;
  --lesson-radius-section: 26px;
  --lesson-radius-card: 16px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  color-scheme: light;
  font-family: var(--font-sans);
  font-synthesis: none;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(248, 223, 215, 0.75), transparent 26rem),
    radial-gradient(circle at 88% 80%, rgba(220, 235, 226, 0.85), transparent 30rem),
    var(--canvas);
}

a {
  color: inherit;
}

.page-shell {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 72px 0 64px;
}

.hero {
  max-width: 760px;
  margin-bottom: 64px;
}

.suit-row {
  display: flex;
  gap: 10px;
  margin-bottom: 28px;
}

.suit-token {
  display: grid;
  width: 48px;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 10px 24px rgba(61, 69, 58, 0.09);
  font-size: 23px;
  transform: rotate(-4deg);
}

.suit-token:nth-child(even) {
  transform: rotate(4deg) translateY(3px);
}

.suit-token--red {
  background: var(--coral-light);
}

.suit-token--dark {
  background: var(--green-light);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 650;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 16px;
  font-size: clamp(44px, 6vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.035em;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.22;
  letter-spacing: -0.025em;
}

.hero__lead {
  max-width: 520px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.7;
}

.mode-section {
  padding: 32px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 32px;
  background: rgba(255, 253, 248, 0.72);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.tiny-card {
  display: grid;
  width: 56px;
  height: 72px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  box-shadow: 0 8px 22px rgba(61, 69, 58, 0.1);
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
  transform: rotate(7deg);
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.mode-card {
  display: flex;
  min-height: 300px;
  padding: 24px;
  flex-direction: column;
  border: 1px solid transparent;
  border-radius: 24px;
  text-decoration: none;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

.mode-card:hover {
  border-color: rgba(33, 51, 46, 0.13);
  box-shadow: var(--shadow-hover);
  transform: translateY(-5px) rotate(-0.35deg);
}

.mode-card:focus-visible,
.back-link:focus-visible,
.home-link:focus-visible,
.course-card--link:focus-visible,
.primary-link:focus-visible,
.lesson-card__link:focus-visible,
.quiz-button:focus-visible,
.quiz-option:has(input:focus-visible) {
  outline: 3px solid var(--blue);
  outline-offset: 4px;
}

.mode-card:active {
  transform: translateY(-1px) scale(0.99);
}

.mode-card--bidding {
  background: var(--green-light);
}

.mode-card--playing {
  background: var(--coral-light);
}

.mode-card--practice {
  background: var(--yellow-light);
}

.mode-card__icon {
  display: grid;
  width: 58px;
  aspect-ratio: 1;
  margin-bottom: 36px;
  place-items: center;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.68);
  font-size: 28px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.72);
}

.mode-card__content {
  display: grid;
  gap: 10px;
}

.mode-card__title {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.035em;
}

.mode-card__description {
  min-height: 52px;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.65;
}

.mode-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: auto;
  padding-top: 28px;
}

.status-pill {
  display: inline-flex;
  width: fit-content;
  min-height: 30px;
  padding: 5px 11px;
  align-items: center;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 750;
}

.status-pill--ready {
  background: var(--green);
  color: #fff;
}

.arrow {
  display: grid;
  width: 42px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.66);
  font-size: 22px;
  transition: transform 180ms ease;
}

.mode-card:hover .arrow {
  transform: translateX(3px);
}

.page-shell--inner {
  padding-top: 32px;
}

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 56px;
}

.back-link {
  display: inline-flex;
  min-height: 44px;
  padding: 8px 15px;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.68);
  font-size: 15px;
  font-weight: 750;
  text-decoration: none;
  transition:
    background 180ms ease,
    transform 180ms ease;
}

.back-link:hover {
  background: var(--paper);
  transform: translateX(-2px);
}

.mini-brand {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-heading--compact {
  align-items: center;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.course-card {
  position: relative;
  display: flex;
  min-height: 220px;
  padding: 28px;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 24px;
  box-shadow: 0 12px 32px rgba(61, 69, 58, 0.07);
}

.course-card--link {
  color: inherit;
  text-decoration: none;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.course-card--link:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-5px) rotate(-0.25deg);
}

.course-card--link:active {
  transform: translateY(-1px) scale(0.99);
}

.course-card--pending {
  cursor: not-allowed;
}

.course-card--green {
  background: var(--green-light);
}

.course-card--coral {
  background: var(--coral-light);
}

.course-card--yellow {
  background: var(--yellow-light);
}

.course-card--blue {
  background: var(--blue-light);
}

.course-card__index {
  display: block;
  margin-bottom: 44px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.course-card__icon {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 32px;
  transform: rotate(8deg);
}

.course-card h3 {
  margin-bottom: 9px;
  font-size: clamp(23px, 3vw, 30px);
  letter-spacing: -0.035em;
}

.course-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: auto;
}

.course-card--pending .status-pill {
  margin-top: auto;
}

.course-card--link:hover .arrow {
  transform: translateX(3px);
}

.breadcrumb-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.home-link {
  padding: 10px 6px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
}

.home-link:hover {
  color: var(--ink);
}

.lesson-header {
  max-width: 780px;
  margin-bottom: 52px;
}

.lesson-header__suits {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}

.lesson-header__suits span {
  display: grid;
  width: 42px;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.64);
  font-size: 20px;
  box-shadow: 0 8px 20px rgba(61, 69, 58, 0.08);
}

.lesson-header__suits span:nth-child(even) {
  transform: translateY(4px) rotate(4deg);
}

.lesson-header h1 {
  margin-bottom: 18px;
  font-size: clamp(44px, 7vw, 72px);
}

.lesson-header > p:last-child {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.7;
}

.lesson-list {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  list-style: none;
}

.lesson-card {
  position: relative;
  min-width: 0;
  min-height: 118px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.74);
  border-left: 7px solid var(--chapter-color);
  border-radius: 18px;
  background: var(--chapter-background);
  box-shadow: 0 12px 30px rgba(61, 69, 58, 0.06);
}

.lesson-card--clubs {
  --chapter-color: var(--green);
  --chapter-background: var(--green-light);
}

.lesson-card--diamonds {
  --chapter-color: #bb584a;
  --chapter-background: #f7e1da;
}

.lesson-card--hearts {
  --chapter-color: #c24162;
  --chapter-background: #f8dde5;
}

.lesson-card--spades {
  --chapter-color: #49678f;
  --chapter-background: var(--blue-light);
}

.lesson-card--review {
  --chapter-color: #7b8986;
  --chapter-background:
    radial-gradient(circle at 88% 20%, rgba(255, 255, 255, 0.96), transparent 13rem),
    linear-gradient(135deg, #fbfcfc 0%, #eef1f1 52%, #e2e7e6 100%);
  border-color: rgba(112, 128, 124, 0.2);
  box-shadow: 0 14px 34px rgba(64, 76, 72, 0.1);
}

.lesson-card--review .lesson-card__link {
  grid-template-columns: 68px minmax(0, 1fr) auto 30px;
}

.lesson-card__link,
.lesson-card--pending {
  display: grid;
  min-width: 0;
  min-height: 118px;
  padding: 22px 24px 22px 78px;
  grid-template-columns: 48px minmax(0, 1fr) auto 30px;
  align-items: center;
  gap: 18px;
}

.lesson-card__link {
  color: inherit;
  text-decoration: none;
  transition:
    background 180ms ease,
    transform 180ms ease;
}

.lesson-card__link:hover {
  background: rgba(255, 255, 255, 0.26);
}

.lesson-card__link:active {
  transform: scale(0.995);
}

.lesson-card__number {
  position: absolute;
  top: 17px;
  left: 20px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.12em;
}

.lesson-card__number--review {
  letter-spacing: 0.04em;
}

.lesson-card__suit {
  display: grid;
  width: 44px;
  aspect-ratio: 1;
  grid-column: 1;
  place-items: center;
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.56);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.62);
  font-size: 23px;
}

.lesson-card__suit--review {
  width: 68px;
  min-height: 44px;
  aspect-ratio: auto;
  grid-template-columns: repeat(2, auto);
  gap: 3px;
  border: 1px solid rgba(105, 121, 117, 0.16);
  background: rgba(255, 255, 255, 0.74);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.96),
    0 6px 16px rgba(77, 91, 87, 0.08);
  font-size: 21px;
}

.lesson-card h3 {
  min-width: 0;
  margin: 0;
  grid-column: 2;
  overflow-wrap: anywhere;
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.38;
  letter-spacing: -0.025em;
  text-wrap: pretty;
}

.lesson-card .status-pill {
  grid-column: 3;
  white-space: nowrap;
}

.lesson-card__arrow {
  grid-column: 4;
  color: var(--chapter-color);
  font-size: 22px;
  font-weight: 700;
}

.next-chapter {
  display: grid;
  margin-top: 28px;
  padding: 28px 30px;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 22px;
  border: 1px dashed rgba(73, 103, 143, 0.38);
  border-radius: 22px;
  background: rgba(220, 230, 244, 0.48);
}

.next-chapter__icon {
  display: grid;
  width: 54px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 17px;
  background: rgba(255, 255, 255, 0.68);
  font-size: 27px;
}

.next-chapter h2 {
  font-size: clamp(23px, 3vw, 32px);
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.page-shell--lesson {
  width: min(980px, calc(100% - 48px));
  padding-top: 32px;
}

.lesson-page .top-nav {
  margin-bottom: 36px;
}

.course-lesson-header {
  display: flex;
  min-width: 0;
  margin-bottom: var(--lesson-section-gap);
  padding: clamp(28px, 5vw, 48px);
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  border: 1px solid rgba(53, 104, 89, 0.12);
  border-radius: var(--lesson-radius-hero);
  box-shadow: 0 18px 44px rgba(61, 69, 58, 0.09);
}

.course-lesson-header--clubs {
  background:
    radial-gradient(circle at 92% 14%, rgba(255, 255, 255, 0.74), transparent 15rem),
    var(--green-light);
}

.course-lesson-header--hearts {
  background:
    radial-gradient(circle at 92% 14%, rgba(255, 255, 255, 0.76), transparent 15rem),
    var(--coral-light);
}

.course-lesson-header h1 {
  max-width: 670px;
  margin-bottom: 18px;
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.course-lesson-header > div > p:last-child {
  max-width: 620px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.75;
}

.lesson-page .course-lesson-header h1,
.lesson-page .lesson-block__heading h2 {
  font-family: var(--font-lesson-display);
}

.lesson-page .eyebrow {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.lesson-page .lesson-block h3,
.lesson-page .final-quiz h3 {
  font-family: var(--font-sans);
  font-weight: 700;
}

.lesson-time {
  display: inline-flex;
  min-height: 38px;
  padding: 8px 14px;
  align-items: center;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.66);
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
}

.learning-goals {
  display: grid;
  margin-bottom: var(--lesson-section-gap);
  padding: 20px 22px;
  grid-template-columns: minmax(118px, 0.34fr) minmax(0, 1.66fr);
  align-items: stretch;
  gap: 18px;
  border: 1px solid rgba(53, 104, 89, 0.13);
  border-radius: var(--lesson-radius-section);
  background: rgba(255, 253, 248, 0.82);
  box-shadow: 0 10px 26px rgba(61, 69, 58, 0.055);
}

.learning-goals > div {
  display: flex;
  padding: 4px 2px;
  align-items: center;
}

.learning-goals ul {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  color: var(--ink-soft);
  list-style: none;
}

.learning-goals li {
  min-width: 0;
  min-height: 92px;
  padding: 15px 16px;
  border: 1px solid rgba(53, 104, 89, 0.13);
  border-radius: var(--lesson-radius-card);
  background: rgba(255, 255, 255, 0.58);
  box-shadow: inset 0 3px 0 rgba(53, 104, 89, 0.16);
  font-size: 15px;
  line-height: 1.58;
}

.learning-goals strong {
  display: block;
  margin-bottom: 3px;
  color: var(--ink);
  font-family: var(--font-lesson-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.35;
}

.lesson-block,
.final-quiz {
  min-width: 0;
  margin-bottom: var(--lesson-section-gap);
  padding: clamp(24px, 5vw, 42px);
  border: 1px solid rgba(53, 104, 89, 0.11);
  border-radius: var(--lesson-radius-section);
  background: rgba(255, 253, 248, 0.82);
  box-shadow: 0 14px 34px rgba(61, 69, 58, 0.065);
}

.lesson-block--warm {
  background: rgba(248, 235, 189, 0.48);
}

.lesson-block__heading {
  display: flex;
  margin-bottom: 30px;
  align-items: flex-start;
  gap: 18px;
}

.lesson-block__heading.lesson-block__heading--index-title {
  margin-bottom: 26px;
  gap: 16px;
}

.lesson-block__heading--index-title > div {
  min-width: 0;
  padding-top: 1px;
}

.lesson-block__heading--index-title .lesson-block__index {
  margin-top: 2px;
}

.lesson-block__index {
  display: grid;
  width: 42px;
  aspect-ratio: 1;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 13px;
  background: var(--green);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}

.lesson-block__heading h2 {
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

.lesson-block__heading .term-en {
  font-size: 0.72em;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.lesson-copy-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  align-items: start;
  gap: 28px;
}

.lesson-copy p,
.lesson-caption {
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.78;
}

.point-grid {
  display: grid;
  margin: 24px 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.point-grid > span {
  display: grid;
  min-width: 0;
  padding: 14px 8px;
  place-items: center;
  gap: 3px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  box-shadow: 0 8px 18px rgba(61, 69, 58, 0.06);
}

.point-grid strong {
  font-size: 24px;
}

.point-grid small {
  color: var(--ink-soft);
  font-weight: 750;
}

.note-card {
  margin-bottom: 0;
  padding: 16px 18px;
  border-left: 4px solid var(--yellow);
  border-radius: 10px 16px 16px 10px;
  background: rgba(248, 235, 189, 0.54);
  color: var(--ink) !important;
  font-size: 15px !important;
  line-height: 1.65 !important;
}

.note-card--center {
  margin: 22px 0 0;
  text-align: center;
}

.bridge-hand {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
  box-shadow: 0 12px 26px rgba(61, 69, 58, 0.08);
}

.bridge-hand h3,
.bridge-hand h4 {
  margin-bottom: 14px;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.bridge-hand__cards {
  display: grid;
  gap: 7px;
}

.bridge-hand__row {
  display: grid;
  min-width: 0;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: baseline;
  gap: 8px;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: clamp(15px, 2vw, 18px);
  font-weight: 750;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.bridge-hand__row--hearts,
.bridge-hand__row--diamonds {
  color: #b94755;
}

.bridge-hand--example > p {
  margin: 16px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.6;
}

.shape-compare {
  display: grid;
  gap: 12px;
}

.shape-compare article {
  display: grid;
  min-width: 0;
  padding: 18px 20px;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.shape-compare strong {
  font-size: 24px;
}

.shape-compare p {
  margin: 0;
  grid-column: 1 / -1;
  color: var(--ink-soft);
  font-size: 14px;
}

.rule-callout {
  display: flex;
  margin: 22px 0;
  padding: 18px 20px;
  flex-direction: column;
  gap: 5px;
  border: 1px solid rgba(218, 109, 88, 0.22);
  border-radius: 18px;
  background: var(--coral-light);
  line-height: 1.6;
}

.rule-callout--wide {
  margin: 24px 0 0;
}

.checkpoint {
  min-width: 0;
  margin-top: 34px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.checkpoint__heading,
.final-quiz__heading {
  display: flex;
  margin-bottom: 22px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.checkpoint__heading h3 {
  margin-bottom: 0;
  font-size: clamp(22px, 3vw, 30px);
}

.final-quiz {
  background:
    radial-gradient(circle at 96% 8%, rgba(220, 230, 244, 0.92), transparent 19rem),
    rgba(255, 253, 248, 0.86);
}

.final-quiz__heading > p {
  max-width: 390px;
  margin-bottom: 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.quiz-app {
  min-width: 0;
  padding: 22px;
  border: 1px solid rgba(33, 51, 46, 0.11);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.62);
}

.quiz-start {
  display: flex;
  min-height: 92px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.quiz-start--button-only {
  min-height: 46px;
  justify-content: flex-start;
}

.quiz-start p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

.checkpoint__heading--label-only,
.final-quiz__heading--label-only {
  margin-bottom: 14px;
}

.checkpoint__heading--label-only .eyebrow,
.final-quiz__heading--label-only .eyebrow {
  margin-bottom: 0;
}

.quiz-button {
  min-height: 46px;
  padding: 10px 18px;
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition:
    transform 160ms ease,
    background 160ms ease;
}

.quiz-button:hover:not(:disabled) {
  transform: translateY(-2px);
}

.quiz-button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.quiz-button--primary {
  background: var(--green);
  color: #fff;
}

.quiz-button--primary:hover:not(:disabled) {
  background: #294f45;
}

.quiz-button--secondary {
  background: var(--blue-light);
  color: var(--ink);
}

.quiz-stage__topline {
  display: flex;
  margin-bottom: 18px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.quiz-progress,
.quiz-timer {
  font-size: 14px;
  font-weight: 700;
}

.quiz-progress {
  color: var(--ink-soft);
}

.quiz-timer {
  display: inline-flex;
  min-width: 68px;
  min-height: 36px;
  padding: 6px 12px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--green-light);
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.quiz-timer--urgent {
  background: var(--coral-light);
  color: #9d3643;
}

.quiz-group {
  margin-bottom: 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.quiz-question {
  margin-bottom: 8px;
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.35;
}

.quiz-question:focus {
  outline: none;
}

.quiz-instruction {
  margin-bottom: 20px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.hand-single {
  max-width: 430px;
  margin-bottom: 22px;
}

.hand-pair {
  display: grid;
  min-width: 0;
  margin-bottom: 22px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.hand-pair--static {
  margin-bottom: 0;
}

.quiz-form {
  display: grid;
  gap: 14px;
}

.quiz-options {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  border: 0;
}

.quiz-option {
  display: flex;
  min-width: 0;
  min-height: 48px;
  padding: 10px 13px;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--paper);
  cursor: pointer;
  line-height: 1.4;
}

.quiz-option:hover {
  border-color: rgba(53, 104, 89, 0.38);
}

.quiz-option input {
  width: 18px;
  height: 18px;
  margin: 0;
  flex: 0 0 auto;
  accent-color: var(--green);
}

.quiz-option span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.quiz-validation {
  min-height: 22px;
  margin: 0;
  color: #a53849;
  font-size: 14px;
  font-weight: 750;
}

.quiz-action-row {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(150px, 190px) minmax(0, 1fr);
  align-items: start;
  gap: 16px;
}

.quiz-action-row > .quiz-button {
  width: 100%;
  min-width: 0;
  white-space: normal;
}

.quiz-feedback {
  min-width: 0;
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--blue-light);
  overflow-wrap: anywhere;
}

.quiz-result:focus {
  outline: none;
}

.quiz-feedback--correct {
  background: var(--green-light);
}

.quiz-feedback--incorrect {
  background: var(--coral-light);
}

.quiz-feedback p {
  margin-bottom: 8px;
  line-height: 1.62;
}

.quiz-feedback__label {
  font-size: 18px;
  font-weight: 700;
}

.quiz-result h3 {
  margin-bottom: 12px;
  font-size: clamp(25px, 4vw, 34px);
}

.quiz-result > p:not(.eyebrow) {
  color: var(--ink-soft);
  line-height: 1.6;
}

.quiz-result__score strong {
  color: var(--ink);
  font-size: 22px;
}

.quiz-result__pass {
  width: fit-content;
  margin: 0 0 18px;
  padding: 8px 13px;
  border-radius: 999px;
  font-weight: 800;
}

.quiz-result__pass.is-pass {
  background: var(--green-light);
  color: var(--green);
}

.quiz-result__pass.is-fail {
  background: var(--coral-light);
  color: #8a3f31;
}

.quiz-result__summary {
  margin: 18px 0 12px;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.6;
}

.quiz-result__hands {
  display: grid;
  margin-bottom: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.quiz-result__hands article {
  min-width: 0;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--paper);
}

.quiz-result__hands h4 {
  margin: 0 0 10px;
  font-size: 16px;
}

.quiz-result__hands p {
  display: grid;
  margin: 0;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 3px 8px;
  line-height: 1.45;
}

.quiz-result__hands p + p {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.quiz-result__hands small {
  grid-column: 1 / -1;
  color: var(--ink-soft);
  overflow-wrap: anywhere;
}

.quiz-result__hands .is-correct {
  color: var(--green);
  font-weight: 700;
}

.quiz-result__hands .is-incorrect {
  color: #a53849;
  font-weight: 700;
}

.term-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.term-card {
  min-width: 0;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: 20px;
}

.term-card--major {
  background: var(--blue-light);
}

.term-card--minor {
  background: var(--coral-light);
}

.term-card--fit {
  background: var(--green-light);
}

.fit-term,
.has-fit-text {
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  font-style: normal;
  font-variant: normal;
}

.term-card > span {
  display: block;
  margin-bottom: 18px;
  font-size: 24px;
  font-weight: 700;
}

.term-card h3 {
  margin-bottom: 10px;
  font-size: 19px;
}

.term-card p {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.65;
}

.contract-priority {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
}

.contract-priority article {
  display: flex;
  min-width: 0;
  min-height: 148px;
  padding: 18px;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  text-align: center;
}

.contract-priority__rank {
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
}

.contract-priority article strong {
  font-size: clamp(22px, 3vw, 28px);
}

.contract-priority article > span:last-child {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.5;
}

.contract-priority__arrow {
  color: var(--ink-soft);
  font-size: 20px;
}

.lesson-caption {
  margin: 22px auto 0;
  max-width: 740px;
  text-align: center;
}

.score-comparison {
  min-width: 0;
  margin-top: 28px;
  padding: 24px;
  border: 1px solid rgba(73, 103, 143, 0.2);
  border-radius: 22px;
  background: rgba(220, 230, 244, 0.58);
}

.score-comparison__heading {
  max-width: 720px;
  margin-bottom: 20px;
}

.score-comparison__heading h3 {
  margin-bottom: 10px;
  font-size: clamp(22px, 3vw, 29px);
}

.score-comparison__heading > p:last-child {
  margin-bottom: 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.score-comparison__grid {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.score-comparison__grid article {
  display: flex;
  min-width: 0;
  padding: 18px;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--paper);
}

.score-comparison__grid article > strong {
  font-size: clamp(20px, 3vw, 25px);
}

.score-comparison__grid article > span {
  color: var(--ink-soft);
  font-size: 14px;
}

.score-comparison dl {
  display: grid;
  margin: 14px 0 0;
  gap: 7px;
}

.score-comparison dl div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.score-comparison dt {
  color: var(--ink-soft);
  font-size: 13px;
}

.score-comparison dd {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  white-space: nowrap;
}

.score-comparison__summary {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.6);
  color: var(--ink-soft);
  line-height: 1.62;
}

.score-comparison__summary strong {
  color: var(--ink);
}

.decision-rule {
  margin-top: 32px;
}

.decision-rule h3 {
  margin-bottom: 16px;
  font-size: 22px;
}

.decision-rule ol {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 10px;
  list-style: none;
}

.decision-rule li {
  display: grid;
  padding: 14px 16px;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.62);
}

.decision-rule li > span {
  display: grid;
  width: 30px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}

.decision-rule p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.55;
}

.decision-rule strong {
  color: var(--ink);
}

.lesson-footer {
  display: flex;
  padding: 10px 0 4px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.inner-page--status {
  display: flex;
  align-items: stretch;
}

.page-shell--status {
  display: flex;
  min-height: 100vh;
  padding-top: 32px;
  flex-direction: column;
}

.status-card {
  display: flex;
  width: min(660px, 100%);
  margin: auto;
  padding: 60px 40px;
  flex-direction: column;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 32px;
  background: rgba(255, 253, 248, 0.78);
  box-shadow: var(--shadow);
  text-align: center;
  backdrop-filter: blur(12px);
}

.status-card__icon {
  display: grid;
  width: 88px;
  aspect-ratio: 1;
  margin-bottom: 28px;
  place-items: center;
  border-radius: 28px;
  background: var(--coral-light);
  font-size: 42px;
  transform: rotate(-4deg);
}

.status-card__icon--yellow {
  background: var(--yellow-light);
}

.status-card h1 {
  margin-bottom: 18px;
  font-size: clamp(44px, 7vw, 68px);
}

.status-card > p:not(.eyebrow) {
  margin-bottom: 32px;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.7;
}

.primary-link {
  display: inline-flex;
  min-height: 48px;
  padding: 11px 20px;
  align-items: center;
  gap: 12px;
  border-radius: 999px;
  background: var(--green);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  transition:
    background 180ms ease,
    transform 180ms ease;
}

.primary-link:hover {
  background: #294f45;
  transform: translateY(-2px);
}

.course-lesson-header--diamonds {
  background:
    radial-gradient(circle at 90% 12%, rgba(255, 255, 255, 0.72), transparent 14rem),
    linear-gradient(135deg, #f7e5df, #f8edcf);
}

.course-lesson-header--review {
  background:
    radial-gradient(circle at 90% 12%, rgba(255, 255, 255, 0.98), transparent 14rem),
    linear-gradient(135deg, #fbfcfc 0%, #edf1f0 54%, #e2e8e6 100%);
}

.opening-meaning-grid,
.point-class-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.opening-meaning-grid article,
.point-class-grid article {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.opening-meaning-grid article > span {
  display: inline-flex;
  min-height: 40px;
  padding: 7px 12px;
  align-items: center;
  border-radius: 999px;
  background: var(--green-light);
  color: var(--green);
  font-weight: 800;
}

.opening-meaning-grid h3 {
  margin: 14px 0 6px;
  font-size: 21px;
}

.opening-meaning-grid p,
.opening-flow p,
.panel-guide p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.62;
}

.opening-table {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  overflow: hidden;
}

.opening-table__row {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(280px, 1.25fr) repeat(3, minmax(0, 1fr));
}

.opening-table__row + .opening-table__row {
  border-top: 1px solid var(--line);
}

.opening-table__row > * {
  min-width: 0;
  padding: 13px 15px;
  overflow-wrap: anywhere;
}

.opening-table__row > :first-child {
  white-space: nowrap;
}

.opening-table__row > * + * {
  border-left: 1px solid var(--line);
}

.opening-table__head {
  background: var(--green);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.opening-table__row strong {
  font-size: 18px;
}

.opening-table__row--locked {
  background: #eceeeb;
  color: #737872;
}

.opening-table__row--locked strong {
  color: #666c67;
}

.opening-table__lock {
  grid-column: 2 / -1;
  color: #737872;
  font-weight: 700;
}

.opening-flow {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 11px;
  list-style: none;
}

.opening-flow li,
.panel-guide article {
  display: grid;
  min-width: 0;
  padding: 15px 17px;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 13px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--paper);
}

.opening-flow li > span,
.panel-guide article > span {
  display: grid;
  width: 34px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 10px;
  background: var(--green);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
}

.point-class-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.point-class-grid article {
  display: grid;
  gap: 7px;
}

.point-class-grid strong {
  color: var(--ink-soft);
  font-size: 14px;
}

.point-class-grid span {
  font-size: 25px;
  font-weight: 800;
}

.point-class-grid small {
  color: var(--ink-soft);
}

.point-class-grid [data-point-class="none"] {
  background: #eceeeb;
}

.point-class-grid [data-point-class="weak"] {
  background: var(--blue-light);
}

.point-class-grid [data-point-class="invite"] {
  background: rgba(248, 235, 189, 0.62);
}

.point-class-grid [data-point-class="strong"] {
  background: var(--coral-light);
}

.point-class-grid [data-point-class="extreme"] {
  background: #eadff1;
}

.panel-guide {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.panel-guide article {
  align-content: start;
}

.quiz-options--bid {
  display: block;
}

.bidding-panel {
  min-width: 0;
  max-width: 620px;
  padding: 16px;
  border: 2px solid #9eb5ac;
  border-radius: 18px;
  background: #e8f0ec;
  color: #21332e;
  box-shadow: 0 10px 24px rgba(53, 104, 89, 0.12);
}

.bidding-panel button {
  min-width: 0;
  min-height: 46px;
  padding: 8px 10px;
  border: 1px solid #78988f;
  border-radius: 11px;
  background: #fff;
  color: #294f45;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.bidding-panel button:hover:not(:disabled),
.bidding-panel button[aria-pressed="true"] {
  border-color: #356859;
  background: #356859;
  color: #fff;
}

.bidding-panel button:disabled,
.bidding-panel button[data-status="locked"] {
  border-color: #c8ceca;
  background: #dfe3e0;
  color: #747b77;
  cursor: not-allowed;
}

.bidding-panel__pass {
  margin-bottom: 12px;
}

.bidding-panel__pass button {
  width: 100%;
}

.bidding-panel__levels,
.bidding-panel__denominations {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 7px;
}

.bidding-panel__denominations {
  margin-top: 12px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.bidding-panel__denominations[hidden] {
  display: none;
}

.bidding-panel__selection {
  min-height: 22px;
  margin: 13px 2px 0;
  color: #4e625b;
  font-size: 14px;
  line-height: 1.55;
}

@media (max-width: 820px) {
  .mode-grid {
    grid-template-columns: 1fr;
  }

  .mode-card {
    min-height: 235px;
  }

  .mode-card__icon {
    margin-bottom: 24px;
  }

  .lesson-list {
    grid-template-columns: 1fr;
  }

  .lesson-copy-grid,
  .learning-goals {
    grid-template-columns: 1fr;
  }

  .term-grid {
    grid-template-columns: 1fr;
  }

  .opening-meaning-grid,
  .point-class-grid,
  .panel-guide {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .score-comparison__grid {
    grid-template-columns: 1fr;
  }

  .contract-priority {
    grid-template-columns: 1fr;
  }

  .contract-priority__arrow {
    transform: rotate(90deg);
    text-align: center;
  }

  .contract-priority article {
    min-height: 122px;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 28px, 1120px);
    padding: 40px 0 36px;
  }

  .hero {
    margin-bottom: 40px;
  }

  .suit-token {
    width: 42px;
    border-radius: 13px;
    font-size: 20px;
  }

  h1 {
    font-size: clamp(43px, 15vw, 60px);
  }

  .mode-section {
    padding: 20px;
    border-radius: 24px;
  }

  .section-heading {
    align-items: center;
  }

  .tiny-card {
    display: none;
  }

  .mode-card {
    min-height: 225px;
    padding: 22px;
  }

  .mode-card__description {
    min-height: auto;
  }

  .page-shell--inner,
  .page-shell--status {
    padding-top: 18px;
  }

  .top-nav {
    margin-bottom: 32px;
  }

  .mini-brand {
    font-size: 13px;
  }

  .course-grid {
    grid-template-columns: 1fr;
  }

  .course-card {
    min-height: 190px;
    padding: 24px;
  }

  .breadcrumb-links {
    gap: 4px;
  }

  .home-link {
    font-size: 13px;
  }

  .lesson-header {
    margin-bottom: 38px;
  }

  .lesson-header h1 {
    font-size: clamp(40px, 13vw, 56px);
  }

  .lesson-section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .lesson-card {
    min-height: 0;
    padding: 0;
  }

  .lesson-card__link,
  .lesson-card--pending {
    min-height: 148px;
    padding: 18px;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    align-items: end;
    gap: 16px 12px;
  }

  .lesson-card--review .lesson-card__link {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .lesson-card__number {
    top: 20px;
    left: 18px;
  }

  .lesson-card__suit {
    position: absolute;
    top: 14px;
    right: 16px;
    width: 40px;
    font-size: 21px;
  }

  .lesson-card__suit--review {
    width: 64px;
    min-height: 40px;
  }

  .lesson-card h3 {
    grid-column: 1 / -1;
    grid-row: 1;
    align-self: start;
    padding-top: 42px;
    font-size: 18px;
  }

  .lesson-card .status-pill {
    grid-column: 1;
    grid-row: 2;
    justify-self: start;
    padding-inline: 9px;
    font-size: 12px;
  }

  .lesson-card__arrow {
    grid-column: 2;
    grid-row: 2;
  }

  .next-chapter {
    padding: 22px;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 16px;
  }

  .next-chapter > .status-pill {
    grid-column: 2;
  }

  .page-shell--lesson {
    width: min(100% - 28px, 980px);
    padding-top: 18px;
  }

  .course-lesson-header {
    padding: 26px 22px;
    flex-direction: column;
    gap: 18px;
    border-radius: 24px;
  }

  .course-lesson-header h1 {
    max-width: 100%;
    font-size: clamp(34px, 10.5vw, 42px);
    line-height: 1.2;
    letter-spacing: -0.02em;
  }

  .course-lesson-header > div > p:last-child {
    font-size: 16px;
  }

  .learning-goals,
  .lesson-block,
  .final-quiz {
    padding: 22px 20px;
    border-radius: 22px;
  }

  .learning-goals {
    gap: 12px;
  }

  .learning-goals > div {
    padding: 0;
  }

  .learning-goals ul {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .learning-goals li {
    min-height: 0;
    padding: 14px 15px;
  }

  .lesson-block__heading {
    gap: 12px;
  }

  .lesson-block__heading.lesson-block__heading--index-title {
    margin-bottom: 24px;
    gap: 12px;
  }

  .lesson-block__heading h2 {
    font-size: clamp(25px, 8vw, 34px);
  }

  .lesson-block__heading .term-en {
    display: block;
    margin-top: 3px;
    font-size: 0.62em;
    line-height: 1.35;
  }

  .point-grid {
    gap: 7px;
  }

  .point-grid > span {
    padding: 12px 5px;
  }

  .bridge-hand {
    padding: 17px;
  }

  .checkpoint__heading,
  .final-quiz__heading,
  .quiz-start {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .final-quiz__heading > p {
    max-width: none;
  }

  .quiz-app {
    padding: 16px;
  }

  .score-comparison {
    padding: 18px;
  }

  .quiz-options,
  .hand-pair,
  .quiz-result__hands {
    grid-template-columns: 1fr;
  }

  .quiz-button {
    max-width: 100%;
  }

  .quiz-action-row {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 12px;
  }

  .shape-compare article {
    grid-template-columns: 1fr;
  }

  .shape-compare p {
    grid-column: auto;
  }

  .lesson-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .lesson-footer .back-link,
  .lesson-footer .primary-link {
    justify-content: center;
  }

  .status-card {
    padding: 44px 24px;
    border-radius: 24px;
  }

  .opening-meaning-grid,
  .point-class-grid,
  .panel-guide {
    grid-template-columns: 1fr;
  }

  .opening-table__head {
    display: none;
  }

  .opening-table__row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .opening-table__row > :first-child {
    white-space: nowrap;
  }

  .opening-table__row > * {
    padding: 11px 13px;
  }

  .opening-table__row--locked > :first-child {
    padding-inline: 8px;
    font-size: 15px;
    letter-spacing: -0.035em;
  }

  .opening-table__row > * + * {
    border-left: 0;
  }

  .opening-table__row > :nth-child(3),
  .opening-table__row > :nth-child(4) {
    border-top: 1px dashed var(--line);
  }

  .bidding-panel {
    width: 100%;
    max-width: 100%;
    padding: 12px;
  }

  .bidding-panel__levels {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .bidding-panel__denominations {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* 1-02 建立牌組 */
.quiz-holding {
  display: grid;
  min-width: 0;
  margin: 16px 0;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
}

.quiz-holding__suit {
  display: flex;
  width: 58px;
  align-items: center;
  justify-content: center;
  background: var(--green-light);
  font-size: 28px;
}

.quiz-holding__hands {
  display: grid;
  min-width: 0;
  padding: 12px 14px 12px 0;
  gap: 8px;
}

.quiz-holding__hands > div {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(90px, auto) minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.quiz-holding__hands span {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 750;
}

.quiz-holding__hands strong {
  min-width: 0;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 19px;
  letter-spacing: 0.04em;
  overflow-wrap: anywhere;
}

.play-holding-example > .quiz-holding {
  margin-top: 0;
}

.play-opening-sequence,
.play-calculation-steps {
  display: grid;
  margin: 20px 0 0;
  padding: 0;
  counter-reset: play-step;
  list-style: none;
  gap: 9px;
}

.play-opening-condition {
  margin: 18px 0 -6px;
  color: var(--green);
  font-weight: 800;
}

.play-opening-sequence li,
.play-calculation-steps li {
  display: grid;
  min-width: 0;
  padding: 12px 14px;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.68);
  line-height: 1.55;
  counter-increment: play-step;
}

.play-opening-sequence li::before,
.play-calculation-steps li::before {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: white;
  content: counter(play-step);
  font-size: 13px;
  font-weight: 800;
}

.play-definition-card {
  margin-bottom: 16px;
  padding: 20px;
  border-left: 5px solid var(--green);
  border-radius: 14px;
  background: var(--green-light);
  font-size: 18px;
  font-weight: 650;
  line-height: 1.75;
}

.play-definition-card p,
.play-establish-three-things article > *:last-child {
  margin-bottom: 0;
}

.play-establish-three-things {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.play-count-table {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.play-count-table > div {
  display: flex;
  min-width: 0;
  padding: 15px 10px;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.72);
  text-align: center;
}

.play-count-table span {
  color: var(--ink-soft);
}

.play-count-table b {
  color: var(--green);
}

.play-locked-conclusions {
  display: grid;
  min-width: 0;
  margin-top: 16px;
  gap: 9px;
}

.play-locked-conclusions p {
  margin: 0;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--blue-light);
  line-height: 1.6;
}

.play-section-lead {
  margin: -12px 0 18px;
  color: var(--ink-soft);
  font-weight: 700;
}

.play-two-quiz-section {
  background:
    radial-gradient(circle at 4% 10%, rgba(239, 217, 141, 0.48), transparent 18rem),
    rgba(255, 253, 248, 0.86);
}

.play-probability-table {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
  isolation: isolate;
}

.play-probability-table::after {
  position: absolute;
  z-index: 2;
  top: 0;
  right: 0;
  bottom: 0;
  width: calc(100% / 3);
  border: 2px solid rgba(154, 72, 72, 0.72);
  border-radius: 10px;
  content: "";
  pointer-events: none;
}

.play-probability-table__row {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.play-probability-table__row + .play-probability-table__row {
  border-top: 1px solid var(--line);
}

.play-probability-table__row > * {
  min-width: 0;
  padding: 12px 8px;
  text-align: center;
  overflow-wrap: anywhere;
}

.play-probability-table__row > * + * {
  border-left: 1px solid var(--line);
}

.play-probability-table__head {
  background: var(--green-light);
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}

.play-probability-table small {
  color: var(--ink-soft);
  line-height: 1.45;
}

.play-probability-table__likely {
  background: rgba(154, 72, 72, 0.045);
}

@media (max-width: 820px) {
  .play-establish-three-things {
    grid-template-columns: 1fr;
  }

  .play-count-table {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .quiz-holding__suit {
    width: 46px;
    font-size: 23px;
  }

  .quiz-holding__hands {
    padding: 10px 10px 10px 0;
  }

  .quiz-holding__hands > div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .quiz-holding__hands strong {
    font-size: 17px;
  }

  .play-count-table {
    grid-template-columns: 1fr;
  }

  .play-probability-table__row > * {
    padding: 10px 4px;
    font-size: 12px;
  }

  .play-probability-table__head {
    font-size: 11px;
  }
}

.lesson-eight-page .bidding-panel__levels {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.lesson-eight-intro,
.lesson-eight-ogust-intro {
  margin-bottom: 20px;
}

.lesson-eight-decision-layout {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: 22px;
}

.lesson-eight-decision-tree,
.lesson-eight-response-tables {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr);
}

.lesson-eight-tree-strength {
  display: grid;
  min-width: 0;
  min-height: 76px;
  padding: 12px 10px 15px;
  place-items: center;
  align-content: center;
  gap: 3px;
  text-align: center;
}

.lesson-eight-tree-strength span {
  color: var(--green);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.lesson-eight-tree-strength strong {
  color: var(--ink);
  font-size: 19px;
}

.lesson-eight-tree-branches {
  position: relative;
  display: grid;
  min-width: 0;
  padding-top: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
  gap: 14px;
}

.lesson-eight-tree-branches::before {
  position: absolute;
  top: 74px;
  right: 0;
  left: 0;
  height: 3px;
  background: rgba(53, 104, 89, 0.62);
  content: "";
}

.lesson-eight-tree-branches::after {
  position: absolute;
  top: 68px;
  right: 0;
  left: 0;
  height: 15px;
  background:
    linear-gradient(var(--green), var(--green)) 0 50% / 2px 15px no-repeat,
    linear-gradient(var(--green), var(--green)) 33.333% 50% / 2px 15px no-repeat,
    linear-gradient(var(--green), var(--green)) 66.666% 50% / 2px 15px no-repeat,
    linear-gradient(var(--green), var(--green)) 100% 50% / 2px 15px no-repeat;
  content: "";
  pointer-events: none;
}

.lesson-eight-tree-branch {
  position: relative;
  min-width: 0;
}

.lesson-eight-tree-branch::before {
  position: absolute;
  top: 77px;
  left: 50%;
  width: 2px;
  height: 23px;
  background: rgba(53, 104, 89, 0.38);
  content: "";
}

.lesson-eight-tree-path {
  min-width: 0;
  min-height: 100%;
  margin-top: 24px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.lesson-eight-tree-path h3,
.lesson-eight-response-card h3 {
  margin: 0 0 14px;
  font-size: 19px;
}

.lesson-eight-tree-path ol {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 0;
  list-style: none;
}

.lesson-eight-tree-path li {
  display: grid;
  min-width: 0;
  padding: 13px 0;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: start;
  gap: 10px;
}

.lesson-eight-tree-path li:first-child {
  padding-top: 0;
}

.lesson-eight-tree-path li:last-child {
  padding-bottom: 0;
}

.lesson-eight-tree-path li + li {
  border-top: 1px dashed var(--line);
}

.lesson-eight-tree-path li > span {
  display: grid;
  width: 30px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 10px;
  background: var(--green);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
}

.lesson-eight-tree-path li strong {
  display: block;
  color: var(--green);
  font-size: 16px;
  line-height: 1.45;
}

.lesson-eight-tree-path li p,
.lesson-eight-tree-path--terminal > p {
  margin: 5px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.58;
}

.lesson-eight-tree-terminal {
  margin-top: 2px;
  padding-right: 10px !important;
  padding-left: 10px !important;
  border-color: var(--line);
  border-radius: 12px;
  background: #fff;
}

.lesson-eight-tree-path--terminal {
  min-height: 0;
  border-color: rgba(178, 81, 72, 0.28);
  background: var(--coral-light);
}

.lesson-eight-tree-path--terminal h3 {
  color: #8b4038;
}

.lesson-eight-response-card {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.lesson-eight-response-table .opening-table__row {
  grid-template-columns: minmax(220px, 1.35fr) minmax(90px, 0.55fr) minmax(130px, 0.72fr) minmax(260px, 1.65fr);
}

.lesson-eight-response-table .opening-table__row > :first-child {
  white-space: normal;
}

.lesson-eight-response-table .opening-table__row > span,
.lesson-eight-level-table .opening-table__row > span {
  line-height: 1.5;
}

.lesson-eight-rule-grid,
.lesson-eight-context-examples,
.lesson-eight-continuation-grid,
.lesson-eight-ogust-targets,
.lesson-eight-stopper-grid {
  display: grid;
  min-width: 0;
  gap: 12px;
}

.lesson-eight-stopper-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.lesson-eight-context-examples,
.lesson-eight-continuation-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-eight-continuation-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-eight-ogust-targets {
  margin-top: 20px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-eight-rule-grid article,
.lesson-eight-continuation-grid article,
.lesson-eight-ogust-targets article,
.lesson-eight-stopper-grid article {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--paper);
}

.lesson-eight-rule-grid {
  grid-template-columns: minmax(0, 1fr);
}

.lesson-eight-rule-grid article {
  display: grid;
  grid-template-columns: minmax(120px, 0.32fr) minmax(230px, 0.62fr) minmax(0, 1.2fr);
  align-items: start;
  gap: 10px 18px;
}

.lesson-eight-rule-grid article > span,
.lesson-eight-continuation-grid article > span,
.lesson-eight-ogust-targets article > span {
  display: block;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.lesson-eight-rule-grid article > strong,
.lesson-eight-continuation-grid article > strong,
.lesson-eight-ogust-targets article > strong,
.lesson-eight-stopper-grid strong {
  display: block;
  color: var(--green);
  font-size: 19px;
  line-height: 1.45;
}

.lesson-eight-rule-grid article > p,
.lesson-eight-continuation-grid article > p,
.lesson-eight-ogust-targets article > p,
.lesson-eight-stopper-grid p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.62;
}

.lesson-eight-example {
  margin-top: 22px;
}

.lesson-eight-teaching-example {
  min-width: 0;
}

.lesson-eight-teaching-example > .eyebrow {
  margin-bottom: 10px;
}

.lesson-eight-teaching-example > h3 {
  margin-bottom: 14px;
}

.lesson-eight-example__result {
  margin: 16px 0 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-eight-example__result > strong {
  display: block;
  margin-bottom: 4px;
  color: var(--green);
  font-size: 18px;
}

.lesson-eight-context-examples,
.lesson-eight-continuation-grid,
.lesson-eight-stopper-grid {
  margin-top: 20px;
}

.lesson-eight-continuation-grid article > span {
  color: var(--ink) !important;
  font-size: 18px !important;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: 0 !important;
}

.lesson-eight-ogust-flow {
  margin-top: 22px;
}

.lesson-eight-ogust-sequence {
  display: grid;
  min-width: 0;
  margin: 20px 0;
  padding: 20px;
  grid-template-columns: minmax(170px, 0.55fr) minmax(0, 1.45fr);
  align-items: center;
  gap: 14px 24px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 20px;
  background: var(--paper);
}

.lesson-eight-ogust-sequence__heading .eyebrow,
.lesson-eight-ogust-sequence__heading h3,
.lesson-eight-ogust-sequence > p {
  margin-bottom: 0;
}

.lesson-eight-ogust-sequence__calls {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
}

.lesson-eight-ogust-sequence__calls > div {
  display: grid;
  min-width: 0;
  padding: 12px 14px;
  gap: 4px;
  border-radius: 14px;
  background: var(--green-light);
}

.lesson-eight-ogust-sequence__calls span {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
}

.lesson-eight-ogust-sequence__calls strong {
  color: var(--green);
  font-size: 20px;
}

.lesson-eight-ogust-sequence > p {
  grid-column: 1 / -1;
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-eight-ogust-table .opening-table__row {
  grid-template-columns: 90px repeat(3, minmax(0, 1fr));
}

.lesson-eight-ogust-table {
  margin-top: 12px;
}

.lesson-eight-ogust-response-title {
  margin-top: 34px;
}

.lesson-eight-ogust-response-note {
  margin: 0 0 14px;
}

.lesson-eight-game-choice {
  display: grid;
  min-width: 0;
  margin: 0 0 22px;
  padding: 20px;
  gap: 18px;
  border: 1px solid rgba(53, 104, 89, 0.24);
  border-radius: 20px;
  background: var(--green-light);
}

.lesson-eight-game-choice .eyebrow,
.lesson-eight-game-choice h3,
.lesson-eight-game-choice p {
  margin-bottom: 0;
}

.lesson-eight-game-choice h3 {
  margin-top: 4px;
  color: var(--green);
  font-size: 21px;
  line-height: 1.4;
}

.lesson-eight-game-choice p {
  margin-top: 8px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-eight-game-choice ol {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  list-style: none;
  counter-reset: game-choice;
}

.lesson-eight-game-choice li {
  display: grid;
  min-width: 0;
  padding: 14px;
  gap: 6px;
  border: 1px solid rgba(53, 104, 89, 0.16);
  border-radius: 14px;
  background: var(--paper);
  counter-increment: game-choice;
}

.lesson-eight-game-choice li::before {
  color: var(--green);
  content: counter(game-choice, decimal-leading-zero);
  font-size: 13px;
  font-weight: 800;
}

.lesson-eight-game-choice li strong {
  color: var(--ink);
  line-height: 1.4;
}

.lesson-eight-game-choice li span {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.55;
}

.lesson-eight-mnemonic {
  margin-top: 20px;
}

.lesson-eight-subtitle {
  margin: 26px 0 14px;
}

.lesson-eight-stopper-grid .is-risk {
  border-color: rgba(178, 81, 72, 0.28);
  background: var(--coral-light);
}

.lesson-eight-stopper-grid .is-risk strong {
  color: #8b4038;
}

.lesson-eight-level-table .opening-table__row {
  grid-template-columns: minmax(190px, 1.05fr) minmax(100px, 0.55fr) minmax(130px, 0.68fr) minmax(260px, 1.55fr);
}

@media (max-width: 900px) {
  .lesson-eight-rule-grid article {
    grid-template-columns: minmax(110px, 0.3fr) minmax(200px, 0.6fr) minmax(0, 1fr);
  }

  .lesson-eight-stopper-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lesson-eight-ogust-targets {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .lesson-eight-tree-branches,
  .lesson-eight-response-tables,
  .lesson-eight-rule-grid,
  .lesson-eight-context-examples,
  .lesson-eight-continuation-grid,
  .lesson-eight-ogust-targets,
  .lesson-eight-stopper-grid,
  .lesson-eight-game-choice ol {
    grid-template-columns: 1fr;
  }

  .lesson-eight-tree-strength {
    min-height: 64px;
    padding: 10px 14px;
    border: 1px solid rgba(53, 104, 89, 0.24);
    border-radius: 14px;
    background: var(--green-light);
  }

  .lesson-eight-tree-branches::before,
  .lesson-eight-tree-branches::after,
  .lesson-eight-tree-branch::before {
    display: none;
  }

  .lesson-eight-tree-branch + .lesson-eight-tree-branch {
    margin-top: 12px;
  }

  .lesson-eight-tree-branches {
    padding-top: 0;
  }

  .lesson-eight-tree-path {
    margin-top: 10px;
  }

  .lesson-eight-rule-grid article,
  .lesson-eight-ogust-sequence {
    grid-template-columns: minmax(0, 1fr);
  }

  .lesson-eight-rule-grid article > p,
  .lesson-eight-ogust-sequence__calls,
  .lesson-eight-ogust-sequence > p {
    grid-column: 1;
  }

  .lesson-eight-response-table .opening-table__head,
  .lesson-eight-ogust-table .opening-table__head,
  .lesson-eight-level-table .opening-table__head {
    display: none;
  }

  .lesson-eight-response-table .opening-table__row,
  .lesson-eight-ogust-table .opening-table__row,
  .lesson-eight-weak-three-table .opening-table__row,
  .lesson-eight-weak-four-table .opening-table__row {
    grid-template-columns: 1fr;
  }

  .lesson-eight-response-table .opening-table__row > * + *,
  .lesson-eight-ogust-table .opening-table__row > * + *,
  .lesson-eight-level-table .opening-table__row > * + * {
    border-top: 1px dashed var(--line);
    border-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

.point-class-grid--responder {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.point-class-grid--responder [data-response-class="none"] {
  background: #eceeeb;
}

.point-class-grid--responder [data-response-class="low"] {
  background: var(--blue-light);
}

.point-class-grid--responder [data-response-class="invite"] {
  background: rgba(248, 235, 189, 0.62);
}

.point-class-grid--responder [data-response-class="high"] {
  background: var(--coral-light);
}

.lesson-five-point-classes {
  display: grid;
  gap: 20px;
}

.lesson-five-point-class-group {
  min-width: 0;
}

.lesson-five-point-class-group > h3 {
  margin: 0 0 12px;
  color: var(--ink-soft);
  font-size: 18px;
}

.response-table .opening-table__row {
  grid-template-columns:
    minmax(96px, 0.6fr)
    minmax(96px, 0.7fr)
    minmax(130px, 1fr)
    minmax(120px, 0.9fr)
    minmax(220px, 1.8fr);
}

.response-table .opening-table__row > :first-child {
  white-space: normal;
}

.response-table + .rule-callout {
  margin-bottom: 12px;
}

.support-explainer {
  display: grid;
  min-width: 0;
  margin: 22px 0 14px;
  padding: 22px;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.35fr);
  gap: 22px;
  border: 1px solid rgba(53, 104, 89, 0.22);
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(224, 239, 232, 0.92), rgba(255, 255, 255, 0.98));
}

.support-explainer h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.35;
}

.support-explainer p {
  margin-bottom: 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.support-explainer dl {
  display: grid;
  margin: 0;
  gap: 9px;
}

.support-explainer dl > div {
  display: grid;
  min-width: 0;
  padding: 12px 14px;
  grid-template-columns: minmax(92px, 0.4fr) minmax(0, 1fr);
  gap: 12px;
  border: 1px solid rgba(53, 104, 89, 0.14);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.82);
}

.support-explainer dt {
  color: var(--green);
  font-weight: 800;
}

.support-explainer dd {
  min-width: 0;
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.response-flow strong {
  color: var(--ink);
}

.rebid-priority article {
  min-height: 168px;
}

.strength-class-columns,
.contract-level-grid,
.invitation-band-grid {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.strength-class-columns article,
.contract-level-grid article,
.invitation-band-grid article {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.strength-class-columns h3,
.contract-level-grid h3,
.invitation-band-grid h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.strength-class-columns p,
.contract-level-grid p,
.invitation-band-grid p {
  margin-bottom: 7px;
  color: var(--ink-soft);
  line-height: 1.58;
}

.strength-class-columns + .note-card {
  margin-top: 14px;
}

.total-review-page .review-score-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.total-review-page .review-hand-basics,
.total-review-page .review-response-columns {
  margin-bottom: 24px;
}

.total-review-page .final-quiz__heading h2 {
  font-family: var(--font-lesson-display);
  font-size: clamp(24px, 3.5vw, 34px);
}

.total-review-page .total-review-final > .lesson-caption {
  margin-bottom: 18px;
}

.extended-review-page,
.extended-review-page main,
.extended-review-page section,
.extended-review-page .quiz-app,
.extended-review-page .quiz-stage,
.extended-review-page .quiz-form,
.extended-review-page .quiz-options,
.extended-review-page .quiz-sequence {
  min-width: 0;
  max-width: 100%;
}

.quiz-sequence {
  display: grid;
  gap: 14px;
}

.quiz-sequence .auction-table,
.quiz-sequence .bidding-panel {
  width: 100%;
  max-width: 100%;
}

.quiz-sequence__status {
  margin: 0;
  padding: 11px 13px;
  border-radius: 12px;
  background: var(--blue-light);
  color: var(--ink-soft);
  font-weight: 750;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.extended-review-page .hand-pair > *,
.extended-review-page .auction-table__row > span,
.extended-review-page .bidding-panel button {
  min-width: 0;
}

@media (max-width: 640px) {
  .extended-review-page .quiz-app {
    overflow: hidden;
  }

  .extended-review-page .quiz-action-row {
    grid-template-columns: minmax(104px, 112px) minmax(0, 1fr);
  }

  .extended-review-page .bidding-panel__levels {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .extended-review-page .bidding-panel__denominations {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .extended-review-page .auction-table__head {
    display: grid;
  }

  .extended-review-page .auction-table__row > span {
    padding-inline: 3px;
    font-size: 13px;
  }
}

.strength-pairing-table {
  min-width: 0;
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  overflow: hidden;
}

.strength-pairing-table > div {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(150px, 1fr) minmax(100px, 0.65fr) minmax(220px, 1.55fr);
}

.strength-pairing-table > div + div {
  border-top: 1px solid var(--line);
}

.strength-pairing-table > div > * {
  min-width: 0;
  padding: 13px 15px;
  overflow-wrap: anywhere;
}

.strength-pairing-table > div > * + * {
  border-left: 1px solid var(--line);
}

.strength-pairing-table__head {
  background: var(--green);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.contract-level-grid {
  margin-top: 24px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.invitation-band-grid article:first-child {
  background: var(--blue-light);
}

.invitation-band-grid article:last-child {
  background: var(--yellow-light);
}

.continuation-examples {
  display: grid;
  min-width: 0;
  gap: 16px;
}

.continuation-example {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.continuation-example__heading {
  display: flex;
  margin-bottom: 16px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.continuation-example__heading h3 {
  margin: 0;
  font-size: 21px;
}

.continuation-example__heading > strong {
  display: inline-flex;
  min-height: 38px;
  padding: 7px 13px;
  align-items: center;
  border-radius: 999px;
  background: var(--green);
  color: #fff;
}

.continuation-example .hand-pair {
  margin-bottom: 14px;
}

.continuation-example__hand {
  margin-top: 14px;
}

.continuation-example > p:last-child {
  margin-bottom: 0;
  color: var(--ink-soft);
  line-height: 1.62;
}

.auction-table {
  min-width: 0;
  margin: 0 0 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
  overflow: hidden;
}

.auction-table__row {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.auction-table__row + .auction-table__row {
  border-top: 1px solid var(--line);
}

.auction-table__row > span {
  display: flex;
  min-width: 0;
  min-height: 42px;
  padding: 9px 8px;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow-wrap: anywhere;
}

.auction-table__row > span + span {
  border-left: 1px solid var(--line);
}

.auction-table__head {
  background: var(--green);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.auction-table__cell {
  position: relative;
  color: var(--ink);
  font-size: 17px;
  font-weight: 800;
}

.auction-table__cell--pass {
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 650;
}

.auction-table__cell--empty {
  background: #f6f7f5;
}

.auction-table__cell--highlight {
  z-index: 1;
  background: #fff0a8;
  color: #214f43;
  box-shadow: inset 0 0 0 3px #3f806d;
}

.quiz-stage .auction-table {
  margin-bottom: 18px;
}

.checkpoint--embedded {
  margin-top: 18px;
}

.lesson-four-page .bidding-panel__levels {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.lesson-five-page .bidding-panel__levels {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.lesson-six-page .bidding-panel__levels {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-six-review-grid,
.lesson-six-sequence-grid,
.lesson-six-invite-grid {
  display: grid;
  min-width: 0;
  gap: 14px;
}

.lesson-six-review-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-six-review-grid article,
.lesson-six-sequence-grid article,
.lesson-six-invite-grid article {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.lesson-six-review-grid span,
.lesson-six-sequence-grid span,
.lesson-six-invite-grid span {
  display: block;
  margin-bottom: 8px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.lesson-six-review-grid strong,
.lesson-six-sequence-grid strong,
.lesson-six-invite-grid strong {
  display: block;
  color: var(--green);
  font-size: 20px;
  line-height: 1.4;
}

.lesson-six-review-grid p,
.lesson-six-sequence-grid p,
.lesson-six-invite-grid p {
  margin: 9px 0 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

.lesson-six-declarer-grid {
  align-items: stretch;
}

.lesson-six-convention-pair {
  display: grid;
  min-width: 0;
  gap: 12px;
}

.lesson-six-convention-pair article {
  min-width: 0;
  padding: 18px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 17px;
  background: rgba(255, 255, 255, 0.82);
}

.lesson-six-convention-pair strong,
.lesson-six-convention-pair span {
  display: block;
}

.lesson-six-convention-pair strong {
  color: var(--green);
  font-size: 19px;
}

.lesson-six-convention-pair span {
  margin-top: 4px;
  font-weight: 800;
}

.lesson-six-convention-pair p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  line-height: 1.55;
}

.lesson-six-response-table {
  margin-bottom: 22px;
}

.lesson-six-initial-flow {
  margin-top: 20px;
}

.lesson-six-sequence-grid,
.lesson-six-invite-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-six-response-table [role="cell"] > strong {
  font-weight: 800;
}

.lesson-six-dialogue {
  width: min(100%, 330px);
  min-width: 0;
  margin-top: 12px;
  padding: 12px;
  border: 1px solid rgba(53, 104, 89, 0.2);
  border-radius: 14px;
  background: var(--green-light);
}

.lesson-six-dialogue__roles,
.lesson-six-dialogue__round {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-six-sequence-grid .lesson-six-dialogue__roles span,
.lesson-six-dialogue__roles span {
  margin: 0;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-align: center;
}

.lesson-six-dialogue__rounds {
  margin-top: 8px;
  border-top: 1px solid rgba(53, 104, 89, 0.18);
}

.lesson-six-dialogue__round {
  min-width: 0;
  border-bottom: 1px solid rgba(53, 104, 89, 0.12);
}

.lesson-six-sequence-grid .lesson-six-dialogue__call,
.lesson-six-dialogue__call {
  display: flex;
  min-width: 0;
  min-height: 38px;
  margin: 0;
  align-items: center;
  justify-content: center;
  color: inherit;
  font-size: inherit;
  letter-spacing: 0;
}

.lesson-six-sequence-grid .lesson-six-dialogue__call > span,
.lesson-six-dialogue__call > span {
  margin: 0;
}

.lesson-six-dialogue__call + .lesson-six-dialogue__call {
  border-left: 1px solid rgba(53, 104, 89, 0.16);
}

.lesson-six-sequence-grid .lesson-six-dialogue__call strong,
.lesson-six-dialogue__call strong {
  min-width: 0;
  color: var(--green);
  font-size: 21px;
  line-height: 1.25;
  text-align: center;
}

.lesson-six-example .lesson-six-dialogue__call--final {
  box-sizing: border-box;
  border: 2px solid rgba(53, 104, 89, 0.76);
  border-radius: 0;
  background: transparent;
  cursor: default;
}

.lesson-six-example .lesson-six-dialogue__call--final strong {
  white-space: nowrap;
  word-break: keep-all;
}

.lesson-six-declarer-note,
.lesson-six-no-fit {
  min-width: 0;
  margin-top: 20px;
  padding: 20px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 18px;
  background: var(--green-light);
}

.lesson-six-declarer-note h3,
.lesson-six-subtitle {
  margin: 0 0 10px;
  font-size: 21px;
}

.lesson-six-declarer-note p,
.lesson-six-stayman-intro p,
.lesson-six-no-fit p {
  margin-bottom: 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-six-subtitle {
  margin-top: 26px;
}

.lesson-six-followup-table {
  margin-top: 0;
}

.lesson-six-examples,
.lesson-six-transfer-examples {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.lesson-six-example {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.lesson-six-example header > span {
  display: block;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}

.lesson-six-example h4 {
  margin: 5px 0 14px;
  font-size: 19px;
  line-height: 1.4;
}

.lesson-six-example .lesson-six-dialogue {
  width: 100%;
  margin: 0 0 14px;
}

.lesson-six-transfer-example__hand,
.lesson-six-stayman-example__hand {
  margin-bottom: 14px;
}

.lesson-six-example h5 {
  margin: 0 0 8px;
  font-size: 16px;
}

.lesson-six-example__analysis {
  display: grid;
  margin: 0;
  padding-left: 24px;
  gap: 8px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.lesson-six-example__analysis li::marker {
  color: var(--green);
  font-weight: 800;
}

.lesson-six-stayman-intro {
  margin-bottom: 20px;
}

.lesson-six-stayman-intro p + p {
  margin-top: 9px;
}

.lesson-six-stayman-table .opening-table__row {
  grid-template-columns: minmax(104px, 0.55fr) minmax(180px, 1fr) minmax(260px, 1.45fr);
}

.lesson-six-stayman-followups {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.lesson-six-stayman-branch {
  width: 100%;
  min-width: 0;
  padding: 20px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 18px;
  background: var(--green-light);
}

.lesson-six-stayman-branch > header {
  display: flex;
  margin-bottom: 12px;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.lesson-six-stayman-branch > header span {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
}

.lesson-six-stayman-branch > header h4 {
  margin: 0;
  color: var(--green);
  font-size: 24px;
}

.lesson-six-stayman-branch .lesson-six-dialogue {
  width: 100%;
  margin: 0 0 14px;
  background: rgba(255, 255, 255, 0.72);
}

.lesson-six-branch-meaning,
.lesson-six-branch-note {
  margin: 12px 0 0;
  color: var(--ink-soft);
  line-height: 1.62;
}

.lesson-six-branch-meaning strong {
  color: var(--green);
}

.lesson-six-branch-table {
  margin-top: 14px;
}

.lesson-six-branch-table .opening-table__row {
  grid-template-columns: minmax(96px, 0.55fr) minmax(120px, 0.7fr) minmax(0, 2.75fr);
}

.lesson-six-branch-table .opening-table__row > * {
  min-width: 0;
  overflow-wrap: anywhere;
}

.lesson-six-branch-table .opening-table__row > :first-child,
.lesson-six-branch-table .opening-table__row > :nth-child(2) {
  white-space: nowrap;
  overflow-wrap: normal;
  word-break: keep-all;
}

.lesson-six-branch-decision-copy {
  margin-top: 16px;
  padding: 16px 18px;
  border: 1px solid rgba(53, 104, 89, 0.16);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
}

.lesson-six-branch-decision-copy h5 {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 17px;
}

.lesson-six-branch-decision-copy ul {
  display: grid;
  margin: 0;
  padding-left: 22px;
  gap: 7px;
  color: var(--ink-soft);
  line-height: 1.58;
}

.lesson-six-branch-decision-copy li::marker {
  color: var(--green);
}

.lesson-six-invite-grid {
  align-items: stretch;
  grid-auto-rows: 1fr;
}

.lesson-six-invite-grid article {
  display: grid;
  grid-template-rows: auto auto 1fr;
  align-content: start;
}

.lesson-six-invite-grid .fit-term {
  display: inline;
  margin: 0;
  color: inherit;
  font-family: Arial, Helvetica, sans-serif;
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: 0;
}

.lesson-six-spade-search {
  min-width: 0;
  padding: 20px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 18px;
  background: var(--green-light);
}

.lesson-six-spade-search p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-six-spade-search p + p {
  margin-top: 10px;
}

.lesson-six-spade-decision-table {
  margin-top: 16px;
}

.lesson-six-spade-decision-table .opening-table__row {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.lesson-six-no-fit > div {
  display: grid;
  margin: 15px 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.lesson-six-no-fit article {
  min-width: 0;
  padding: 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.82);
}

.lesson-six-no-fit article strong,
.lesson-six-no-fit article span {
  display: block;
}

.lesson-six-no-fit article span {
  margin-top: 4px;
  color: var(--ink-soft);
}

.lesson-six-two-nt,
.lesson-six-two-nt__section,
.lesson-six-two-nt-table,
.lesson-six-two-nt__intro article,
.lesson-six-two-nt__call-grid article,
.lesson-six-two-nt__responder,
.lesson-six-two-nt__responder-flow,
.lesson-six-two-nt__responder-step,
.lesson-six-two-nt__responder-step > div,
.lesson-six-two-nt__responder-rules,
.lesson-six-two-nt__responder-rules > div,
.lesson-six-two-nt__transfer-pair article,
.lesson-six-two-nt__slam-grid article {
  min-width: 0;
}

.lesson-six-two-nt__intro,
.lesson-six-two-nt__call-grid,
.lesson-six-two-nt__transfer-pair,
.lesson-six-two-nt__slam-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.lesson-six-two-nt__intro article,
.lesson-six-two-nt__call-grid article,
.lesson-six-two-nt__transfer-pair article,
.lesson-six-two-nt__slam-grid article {
  padding: 18px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 17px;
  background: rgba(255, 255, 255, 0.82);
  overflow-wrap: anywhere;
}

.lesson-six-two-nt__intro span,
.lesson-six-two-nt__transfer-pair span,
.lesson-six-two-nt__slam-grid span {
  display: block;
  margin-bottom: 6px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
}

.lesson-six-two-nt__intro strong,
.lesson-six-two-nt__call-grid strong,
.lesson-six-two-nt__transfer-pair strong,
.lesson-six-two-nt__slam-grid strong {
  display: block;
  color: var(--green);
  font-size: 24px;
  line-height: 1.35;
  word-break: keep-all;
}

.lesson-six-two-nt__intro p,
.lesson-six-two-nt__call-grid p,
.lesson-six-two-nt__transfer-pair p,
.lesson-six-two-nt__slam-grid p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  line-height: 1.62;
}

.lesson-six-two-nt__section {
  margin-top: 28px;
  padding-top: 26px;
  border-top: 1px solid rgba(53, 104, 89, 0.18);
}

.lesson-six-two-nt__section > h3 {
  margin: 0 0 14px;
  font-size: 22px;
}

.lesson-six-two-nt__lead {
  margin: 0 0 14px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-six-two-nt__priority {
  margin: 0 0 18px;
}

.lesson-six-two-nt-response-table .opening-table__row {
  grid-template-columns: minmax(86px, 0.55fr) minmax(100px, 0.7fr) minmax(190px, 1.35fr) minmax(210px, 1.55fr);
}

.lesson-six-two-nt-transfer-table {
  margin-top: 16px;
}

.lesson-six-two-nt-transfer-table .opening-table__row {
  grid-template-columns: minmax(118px, 0.72fr) minmax(130px, 0.82fr) minmax(0, 2.6fr);
}

.lesson-six-two-nt-table .opening-table__row > * {
  min-width: 0;
  overflow-wrap: anywhere;
}

.lesson-six-two-nt-table [role="cell"] > b {
  display: none;
}

.lesson-six-two-nt-table .lesson-six-two-nt-table__call {
  color: var(--green);
  font-size: 24px;
  line-height: 1.25;
  white-space: nowrap;
  word-break: keep-all;
}

.lesson-six-two-nt__call-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-six-two-nt__call-grid article {
  text-align: center;
}

.lesson-six-two-nt__subheading {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 18px;
  line-height: 1.45;
}

.lesson-six-two-nt__responder-divider {
  height: 1px;
  margin: 28px 0 24px;
  border: 0;
  background: rgba(53, 104, 89, 0.28);
}

.lesson-six-two-nt__responder-flow {
  display: grid;
  padding: 18px;
  border: 1px solid rgba(53, 104, 89, 0.2);
  border-radius: 18px;
  background: var(--green-light);
  gap: 12px;
}

.lesson-six-two-nt__responder-step {
  position: relative;
  display: grid;
  padding: 16px;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  border: 1px solid rgba(53, 104, 89, 0.16);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.82);
  overflow-wrap: anywhere;
}

.lesson-six-two-nt__responder-step + .lesson-six-two-nt__responder-step::before {
  position: absolute;
  width: 2px;
  height: 13px;
  top: -13px;
  left: 34px;
  background: rgba(53, 104, 89, 0.38);
  content: "";
}

.lesson-six-two-nt__step-label {
  display: flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  background: var(--green);
  color: white;
  font-size: 17px;
  font-weight: 800;
}

.lesson-six-two-nt__responder-step h5 {
  margin: 4px 0 0;
  font-size: 18px;
  line-height: 1.45;
}

.lesson-six-two-nt__responder-step p {
  margin: 7px 0 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

.lesson-six-two-nt__responder-rules {
  display: grid;
  margin-top: 13px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.lesson-six-two-nt__responder-rules > div {
  padding: 14px;
  border-radius: 13px;
  background: var(--paper);
}

.lesson-six-two-nt__responder-rules strong,
.lesson-six-two-nt__responder-rules span {
  display: block;
}

.lesson-six-two-nt__responder-rules strong {
  color: var(--ink-soft);
  font-size: 13px;
}

.lesson-six-two-nt__responder-rules span {
  margin-top: 4px;
  color: var(--green);
  font-size: 23px;
  font-weight: 800;
  line-height: 1.35;
  word-break: keep-all;
}

.lesson-six-two-nt__slam-grid {
  margin-top: 14px;
}

.lesson-six-two-nt__transfer-pair strong {
  white-space: nowrap;
}

.meaning-quiz-stack {
  display: grid;
  min-width: 0;
  margin-top: 22px;
  gap: 18px;
}

.meaning-quiz-group {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.meaning-quiz-group > h3 {
  margin: 0 0 14px;
  font-size: 20px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.meaning-quiz-group .quiz-app {
  margin-top: 0;
}

.quiz-result__details {
  display: grid;
  margin: 18px 0;
  gap: 10px;
}

.quiz-result__details article {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--paper);
}

.quiz-result__detail-heading {
  display: flex;
  margin-bottom: 9px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.quiz-result__detail-heading h4 {
  margin: 0;
  font-size: 16px;
}

.quiz-result__detail-heading .is-correct {
  color: var(--green);
  font-weight: 700;
}

.quiz-result__detail-heading .is-incorrect {
  color: #a53849;
  font-weight: 700;
}

.quiz-result__details p {
  margin-bottom: 7px;
  color: var(--ink-soft);
  line-height: 1.58;
  overflow-wrap: anywhere;
}

.quiz-result__details p:last-child {
  margin-bottom: 0;
}

@media (max-width: 820px) {
  .point-class-grid--responder,
  .contract-level-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .response-table .opening-table__row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .response-table .opening-table__row > :nth-child(5) {
    grid-column: 1 / -1;
    border-top: 1px dashed var(--line);
    border-left: 0;
  }

  .support-explainer {
    grid-template-columns: 1fr;
  }

  .lesson-six-review-grid {
    grid-template-columns: 1fr;
  }

  .lesson-six-examples,
  .lesson-six-transfer-examples {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .point-class-grid--responder,
  .strength-class-columns,
  .contract-level-grid,
  .invitation-band-grid,
  .lesson-six-sequence-grid,
  .lesson-six-invite-grid,
  .lesson-six-no-fit > div {
    grid-template-columns: 1fr;
  }

  .response-table .opening-table__row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .response-table .opening-table__row > :nth-child(5) {
    grid-column: 1 / -1;
  }

  .strength-pairing-table__head {
    display: none !important;
  }

  .strength-pairing-table > div {
    grid-template-columns: 1fr;
  }

  .strength-pairing-table > div > * + * {
    border-top: 1px dashed var(--line);
    border-left: 0;
  }

  .continuation-example {
    padding: 16px;
  }

  .continuation-example__heading {
    align-items: flex-start;
  }

  .support-explainer {
    padding: 17px;
  }

  .support-explainer dl > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .auction-table__head {
    font-size: 11px;
    letter-spacing: 0;
  }

  .auction-table__row > span {
    min-height: 38px;
    padding: 7px 3px;
  }

  .auction-table__cell {
    font-size: 15px;
  }

  .meaning-quiz-group {
    padding: 15px;
  }

  .meaning-quiz-group > h3 {
    font-size: 17px;
  }

  .lesson-six-two-nt__intro,
  .lesson-six-two-nt__call-grid,
  .lesson-six-two-nt__transfer-pair,
  .lesson-six-two-nt__slam-grid {
    grid-template-columns: 1fr;
  }

  .lesson-six-two-nt__responder-flow {
    padding: 14px;
  }

  .lesson-six-two-nt__responder-step {
    padding: 14px;
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 11px;
  }

  .lesson-six-two-nt__responder-step + .lesson-six-two-nt__responder-step::before {
    left: 30px;
  }

  .lesson-six-two-nt__step-label {
    width: 34px;
    height: 34px;
  }

  .lesson-six-two-nt__responder-rules {
    grid-template-columns: 1fr;
  }

  .lesson-six-two-nt__section {
    margin-top: 24px;
    padding-top: 22px;
  }

  .lesson-six-two-nt-table .opening-table__head {
    display: none;
  }

  .lesson-six-two-nt-table .opening-table__row {
    grid-template-columns: 1fr;
  }

  .lesson-six-two-nt-table .opening-table__row > * + * {
    border-top: 1px dashed var(--line);
    border-left: 0;
  }

  .lesson-six-two-nt-table [role="cell"] > b {
    display: block;
    margin-bottom: 3px;
    color: var(--ink-soft);
    font-size: 12px;
    letter-spacing: 0.04em;
  }

  .lesson-six-two-nt-table .lesson-six-two-nt-table__call {
    font-size: 26px;
  }

  .lesson-six-stayman-table .opening-table__head {
    display: none;
  }

  .lesson-six-stayman-table .opening-table__row {
    grid-template-columns: 1fr;
  }

  .lesson-six-stayman-table .opening-table__row > * + * {
    border-top: 1px dashed var(--line);
    border-left: 0;
  }

  .lesson-six-spade-decision-table .opening-table__head {
    display: none;
  }

  .lesson-six-spade-decision-table .opening-table__row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lesson-six-spade-decision-table .opening-table__row > * + * {
    border-left: 1px solid var(--line);
  }

  .lesson-six-spade-decision-table .opening-table__row > :nth-child(n + 3) {
    border-top: 1px dashed var(--line);
  }

  .lesson-six-spade-decision-table .opening-table__row > :nth-child(3) {
    border-left: 0;
  }

  .lesson-six-stayman-branch {
    padding: 15px;
  }

  .lesson-six-branch-table .opening-table__head {
    display: grid;
  }

  .lesson-six-branch-table .opening-table__row {
    grid-template-columns: minmax(72px, 0.75fr) minmax(80px, 0.85fr) minmax(0, 2fr);
  }

  .lesson-six-branch-table .opening-table__row > * {
    padding: 10px 8px;
  }

  .lesson-six-branch-decision-copy {
    padding: 14px;
  }

  .lesson-six-example {
    padding: 15px;
  }
}

.lesson-zero-intro-grid {
  align-items: stretch;
}

.bid-anatomy {
  min-width: 0;
  padding: 22px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 20px;
  background: var(--green-light);
}

.bid-anatomy__call {
  display: grid;
  margin: 14px 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid rgba(53, 104, 89, 0.22);
  border-radius: 16px;
  background: var(--paper);
}

.bid-anatomy__call strong {
  display: grid;
  min-height: 82px;
  place-items: center;
  font-size: clamp(34px, 6vw, 48px);
}

.bid-anatomy__call strong + strong {
  border-left: 1px solid rgba(53, 104, 89, 0.18);
}

.bid-anatomy dl {
  display: grid;
  margin: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.bid-anatomy dl div {
  display: flex;
  min-width: 0;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
}

.bid-anatomy dt {
  color: var(--green);
  font-size: 20px;
  font-weight: 800;
}

.bid-anatomy dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.bid-anatomy > p:last-child {
  margin: 16px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.58;
}

.call-order {
  min-width: 0;
  margin-top: 28px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.58);
}

.call-order h3 {
  margin-bottom: 8px;
  font-size: 21px;
}

.call-order > p {
  margin-bottom: 18px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.call-order__track {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.call-order__track span {
  display: grid;
  min-width: 66px;
  min-height: 48px;
  padding: 8px 10px;
  place-items: center;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 13px;
  background: var(--paper);
  color: var(--green);
  font-size: 18px;
  font-weight: 800;
}

.call-order__track b {
  color: var(--ink-soft);
  font-weight: 700;
}

.lesson-zero-auction {
  min-width: 0;
  margin-top: 28px;
  padding: 24px;
  border: 1px solid rgba(53, 104, 89, 0.16);
  border-radius: 22px;
  background: rgba(232, 240, 236, 0.72);
}

.lesson-zero-auction > div:first-child h3 {
  margin-bottom: 8px;
  font-size: 22px;
}

.lesson-zero-auction > div:first-child > p:last-child {
  margin-bottom: 18px;
  color: var(--ink-soft);
  line-height: 1.62;
}

.lesson-zero-auction__result {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.lesson-zero-auction__result p {
  min-width: 0;
  margin: 0;
  padding: 14px 15px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.68);
  color: var(--ink-soft);
  line-height: 1.58;
}

.lesson-zero-auction__result strong {
  color: var(--ink);
}

.pass-rules {
  display: grid;
  min-width: 0;
  margin-top: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.pass-rules article {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--paper);
}

.pass-rules strong {
  display: block;
  margin-bottom: 8px;
  color: var(--green);
  line-height: 1.45;
}

.pass-rules p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.62;
}

.contract-score-guide {
  min-width: 0;
  padding: 24px;
  border: 1px solid rgba(53, 104, 89, 0.16);
  border-radius: 22px;
  background: rgba(232, 240, 236, 0.72);
}

.contract-score-guide__heading h3,
.lesson-zero-game-definition h3 {
  margin-bottom: 8px;
  font-size: 22px;
}

.contract-score-guide__heading > p:last-child,
.lesson-zero-game-definition p {
  color: var(--ink-soft);
  line-height: 1.68;
}

.contract-score-formulas,
.contract-score-examples {
  display: grid;
  min-width: 0;
  gap: 10px;
}

.contract-score-formulas {
  margin-top: 20px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.contract-score-formulas article,
.contract-score-examples article {
  display: flex;
  min-width: 0;
  padding: 15px;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  border: 1px solid rgba(53, 104, 89, 0.16);
  border-radius: 15px;
  background: var(--paper);
  overflow-wrap: anywhere;
}

.contract-score-formulas strong,
.contract-score-examples strong {
  color: var(--green);
}

.contract-score-formulas span,
.contract-score-examples span {
  color: var(--ink-soft);
  line-height: 1.5;
}

.contract-score-examples {
  margin-top: 10px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.contract-score-examples article {
  align-items: center;
  text-align: center;
}

.contract-score-examples strong {
  font-size: 20px;
}

.contract-score-guide__scope {
  margin: 18px 0 0;
  padding: 14px 15px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink-soft);
  line-height: 1.62;
}

.lesson-zero-game-definition {
  margin-top: 26px;
}

.game-minimum-grid {
  display: grid;
  min-width: 0;
  margin-top: 24px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.game-minimum-grid article {
  display: flex;
  min-width: 0;
  min-height: 142px;
  padding: 17px 10px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid rgba(53, 104, 89, 0.17);
  border-radius: 17px;
  background: var(--paper);
  text-align: center;
}

.game-minimum-grid strong {
  color: var(--green);
  font-size: clamp(23px, 3vw, 29px);
}

.game-minimum-grid span {
  font-weight: 750;
}

.game-minimum-grid small {
  color: var(--ink-soft);
  line-height: 1.45;
}

.lesson-zero-priority {
  margin-top: 30px;
}

.lesson-zero-bonus__grid,
.lesson-zero-score-pair__grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-zero-bonus__grid p,
.lesson-zero-score-pair__grid p {
  margin: 10px 0 0;
  color: var(--ink-soft);
  line-height: 1.62;
}

.lesson-zero-bonus__scope,
.lesson-zero-score__summary {
  margin: 18px 0 0;
  padding: 14px 15px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink-soft);
  line-height: 1.62;
}

.lesson-zero-bonus__scope strong,
.lesson-zero-score__summary strong {
  color: var(--ink);
}

.lesson-zero-score-pairs {
  display: grid;
  min-width: 0;
  gap: 14px;
}

.lesson-zero-score-pair {
  min-width: 0;
  padding: 18px;
  border: 1px solid rgba(73, 103, 143, 0.2);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.48);
}

.lesson-zero-score-pair h4 {
  margin-bottom: 12px;
  font-size: 18px;
}

.lesson-zero-score-pair__grid {
  display: grid;
  min-width: 0;
  gap: 12px;
}

.lesson-zero-score-pair__grid article {
  display: flex;
  min-width: 0;
  padding: 18px;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--paper);
  overflow-wrap: anywhere;
}

.lesson-zero-score-pair__grid article > strong {
  font-size: clamp(20px, 3vw, 25px);
}

.lesson-zero-score-pair__grid article > span {
  color: var(--ink-soft);
  font-size: 14px;
}

.lesson-zero-score-pair__grid b {
  color: var(--green);
  font-size: 18px;
}

.lesson-zero-balance {
  margin-top: 28px;
}

@media (max-width: 820px) {
  .pass-rules {
    grid-template-columns: 1fr;
  }

  .contract-score-formulas,
  .contract-score-examples {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contract-score-formulas article:last-child {
    grid-column: 1 / -1;
  }

  .game-minimum-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .game-minimum-grid article:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .bid-anatomy,
  .call-order,
  .lesson-zero-auction,
  .contract-score-guide {
    padding: 17px;
  }

  .contract-score-formulas,
  .contract-score-examples {
    grid-template-columns: 1fr;
  }

  .contract-score-formulas article:last-child {
    grid-column: auto;
  }

  .call-order__track {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .call-order__track b {
    display: none;
  }

  .call-order__track span {
    min-width: 0;
  }

  .lesson-zero-auction__result,
  .game-minimum-grid,
  .lesson-zero-bonus__grid,
  .lesson-zero-score-pair__grid {
    grid-template-columns: 1fr;
  }

  .lesson-zero-score-pair {
    padding: 14px;
  }

  .game-minimum-grid article:last-child {
    grid-column: auto;
  }

  .game-minimum-grid article {
    min-height: 112px;
  }
}

.vulnerability-strip {
  display: grid;
  min-width: 0;
  margin-bottom: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.vulnerability-strip > div {
  display: flex;
  min-width: 0;
  padding: 12px 14px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
}

.vulnerability-strip span {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
}

.vulnerability-strip strong {
  color: var(--green);
  font-size: 17px;
}

.lesson-seven-vulnerability-intro {
  align-items: stretch;
}

.lesson-seven-score-link {
  min-width: 0;
  padding: 22px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 20px;
  background: var(--green-light);
}

.lesson-seven-score-link strong {
  display: block;
  font-size: 20px;
  line-height: 1.45;
}

.lesson-seven-score-link p:last-child {
  margin: 10px 0 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-seven-strategy,
.lesson-seven-formula,
.lesson-seven-quality-grid,
.lesson-seven-example-grid {
  display: grid;
  min-width: 0;
  gap: 12px;
}

.lesson-seven-strategy article,
.lesson-seven-formula article,
.lesson-seven-quality-grid article,
.lesson-seven-example-grid article {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--paper);
}

.lesson-seven-strategy span,
.lesson-seven-formula span,
.lesson-seven-quality-grid span,
.lesson-seven-example-grid span {
  display: block;
  margin-bottom: 8px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.lesson-seven-strategy strong,
.lesson-seven-formula strong,
.lesson-seven-quality-grid strong,
.lesson-seven-example-grid strong {
  display: block;
  color: var(--green);
  line-height: 1.45;
}

.lesson-seven-strategy,
.lesson-seven-quality-grid {
  margin-top: 20px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-seven-strategy strong,
.lesson-seven-quality-grid strong {
  font-size: 21px;
}

.lesson-seven-strategy p,
.lesson-seven-formula p,
.lesson-seven-quality-grid p,
.lesson-seven-example-grid p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

.lesson-seven-count-flow,
.lesson-seven-decision-flow {
  margin-bottom: 24px;
}

.lesson-seven-example {
  min-width: 0;
  padding: 22px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 20px;
  background: var(--paper);
}

.lesson-seven-example__heading {
  display: flex;
  margin-bottom: 18px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.lesson-seven-example__heading h3 {
  margin: 0;
  font-size: 22px;
}

.lesson-seven-example__heading > strong {
  flex: 0 0 auto;
  padding: 8px 13px;
  border-radius: 999px;
  background: var(--green);
  color: #fff;
}

.lesson-seven-suit-counts {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 15px;
  overflow: hidden;
}

.lesson-seven-suit-counts > div {
  display: grid;
  min-width: 0;
  grid-template-columns: 72px minmax(0, 1fr) minmax(120px, 0.8fr);
}

.lesson-seven-suit-counts > div + div {
  border-top: 1px solid var(--line);
}

.lesson-seven-suit-counts > div > * {
  min-width: 0;
  padding: 11px 13px;
  overflow-wrap: anywhere;
}

.lesson-seven-suit-counts > div > * + * {
  border-left: 1px solid var(--line);
}

.lesson-seven-suit-counts__head {
  background: var(--green);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
}

.lesson-seven-example > p:last-child {
  margin: 16px 0 0;
  line-height: 1.65;
}

.lesson-seven-rule-intro,
.lesson-seven-preempt-intro {
  margin-bottom: 20px;
}

.lesson-seven-formula {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.lesson-seven-rule-examples {
  display: grid;
  min-width: 0;
  margin-top: 22px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.lesson-seven-rule-example {
  --lesson-seven-vulnerability-color: var(--green);
  min-width: 0;
  padding: 22px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 20px;
  background: var(--blue-light);
}

.lesson-seven-rule-example--nv {
  --lesson-seven-vulnerability-color: #216744;
  border-color: #4e9270;
  background: #dcefe3;
  box-shadow: inset 0 6px 0 #216744;
}

.lesson-seven-rule-example--vul {
  --lesson-seven-vulnerability-color: #982f3a;
  border-color: #c66a72;
  background: #f5dfe1;
  box-shadow: inset 0 6px 0 #982f3a;
}

.lesson-seven-rule-example > header {
  display: flex;
  margin-bottom: 16px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.lesson-seven-rule-example > header span,
.lesson-seven-rule-example > header strong {
  display: block;
}

.lesson-seven-rule-example > header span {
  margin-bottom: 5px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
}

.lesson-seven-rule-example > header h3 {
  margin: 0;
  font-size: 22px;
}

.lesson-seven-rule-example > header > strong {
  flex: 0 0 auto;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--lesson-seven-vulnerability-color);
  color: #fff;
  font-size: 13px;
}

.lesson-seven-rule-hand {
  display: grid;
  min-width: 0;
  margin-bottom: 16px;
  grid-template-columns: 1fr;
  border: 1px solid rgba(53, 104, 89, 0.16);
  border-radius: 15px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.78);
}

.lesson-seven-rule-hand p {
  display: grid;
  min-width: 0;
  margin: 0;
  padding: 9px 12px;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 7px;
  font-weight: 750;
}

.lesson-seven-rule-hand p + p {
  border-top: 1px solid var(--line);
}

.lesson-seven-rule-steps {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 8px;
  list-style: none;
}

.lesson-seven-rule-steps li {
  display: grid;
  min-width: 0;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: start;
  gap: 9px;
}

.lesson-seven-rule-steps li > span {
  display: grid;
  width: 28px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 9px;
  background: var(--lesson-seven-vulnerability-color);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
}

.lesson-seven-rule-steps p {
  min-width: 0;
  margin: 2px 0 0;
  color: var(--ink-soft);
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.lesson-seven-rule-steps strong {
  color: var(--lesson-seven-vulnerability-color);
}

.lesson-seven-teaching-hand > h3 {
  margin-bottom: 14px;
  font-size: 16px;
}

.lesson-seven-teaching-hand .bridge-hand__cards {
  margin-bottom: 0;
}

.lesson-seven-teaching-hand .bridge-hand__row > span {
  display: inline;
  margin: 0;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: normal;
  line-height: inherit;
}

.lesson-seven-teaching-summary,
.lesson-seven-teaching-analysis {
  min-width: 0;
  margin-top: 16px;
  padding-top: 15px;
  border-top: 1px solid rgba(53, 104, 89, 0.18);
}

.lesson-seven-teaching-summary > span,
.lesson-seven-teaching-analysis > .eyebrow {
  display: block;
  margin: 0 0 6px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.lesson-seven-teaching-summary > strong {
  display: block;
  color: var(--green);
  line-height: 1.45;
}

.lesson-seven-rule-example .lesson-seven-teaching-summary > strong {
  color: var(--lesson-seven-vulnerability-color);
}

.lesson-seven-teaching-summary > p,
.lesson-seven-teaching-analysis > p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

.lesson-seven-teaching-analysis > h4 {
  margin: 0;
  font-size: 20px;
}

.lesson-seven-opening-table {
  margin: 20px 0;
}

.lesson-seven-opening-table .opening-table__row {
  grid-template-columns: minmax(90px, 0.5fr) minmax(240px, 1.5fr) minmax(150px, 0.8fr);
}

.lesson-seven-decision-flow {
  margin-top: 22px;
}

.lesson-seven-example-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-seven-page .bidding-panel__levels {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-seven-system-note {
  margin: 0 0 14px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.lesson-seven-system-note[data-status="saved"] {
  color: var(--green);
  font-weight: 800;
}

.lesson-seven-system-note[data-status="error"] {
  color: #a53849;
  font-weight: 800;
}

.system-section {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 26px;
  background: rgba(255, 253, 248, 0.78);
  box-shadow: var(--shadow);
}

.system-rule-card {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.system-rule-card[data-enabled="true"] {
  border-color: rgba(53, 104, 89, 0.34);
  box-shadow: inset 5px 0 0 var(--green);
}

.system-rule-card > div:first-child {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.system-rule-card__icon {
  display: grid;
  width: 48px;
  aspect-ratio: 1;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 14px;
  background: var(--coral-light);
  font-size: 24px;
}

.system-rule-card h3 {
  margin: 0 0 6px;
  font-size: 23px;
}

.system-rule-card p {
  color: var(--ink-soft);
  line-height: 1.6;
}

.system-rule-card__state {
  margin: 18px 0;
  padding: 12px 14px;
  border-radius: 13px;
  background: var(--blue-light);
  font-weight: 750;
}

.system-rule-card[data-enabled="true"] .system-rule-card__state {
  background: var(--green-light);
  color: var(--green);
}

.system-rule-card dl {
  display: grid;
  margin: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.system-rule-card dl > div {
  min-width: 0;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 13px;
}

.system-rule-card dt {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
}

.system-rule-card dd {
  margin: 5px 0 0;
  font-weight: 750;
  line-height: 1.45;
}

.system-rule-card__locked {
  margin: 16px 0 0;
  font-size: 14px;
}

.system-course-link {
  margin-top: 18px;
}

@media (max-width: 820px) {
  .lesson-seven-formula,
  .lesson-seven-example-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lesson-seven-rule-examples {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .vulnerability-strip,
  .lesson-seven-strategy,
  .lesson-seven-formula,
  .lesson-seven-quality-grid,
  .lesson-seven-example-grid,
  .system-rule-card dl {
    grid-template-columns: 1fr;
  }

  .lesson-seven-example,
  .lesson-seven-rule-example,
  .system-section,
  .system-rule-card {
    padding: 16px;
  }

  .lesson-seven-rule-example > header {
    flex-direction: column;
  }

  .lesson-seven-example__heading {
    flex-direction: column;
  }

  .lesson-seven-suit-counts > div {
    grid-template-columns: 54px minmax(0, 1fr);
  }

  .lesson-seven-suit-counts > div > :last-child {
    grid-column: 1 / -1;
    border-top: 1px dashed var(--line);
    border-left: 0;
  }

  .lesson-seven-suit-counts__head {
    display: none !important;
  }

  .lesson-seven-opening-table .opening-table__head {
    display: none;
  }

  .lesson-seven-opening-table .opening-table__row {
    grid-template-columns: 1fr;
  }

  .lesson-seven-opening-table .opening-table__row > * + * {
    border-top: 1px dashed var(--line);
    border-left: 0;
  }
}

.course-lesson-header--spades {
  background:
    radial-gradient(circle at 92% 14%, rgba(255, 255, 255, 0.76), transparent 15rem),
    var(--blue-light);
}

.lesson-nine-page .bidding-panel__levels {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.lesson-nine-intro {
  max-width: 900px;
  margin: 0 0 22px;
}

.lesson-nine-intro p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.7;
}

.lesson-nine-review,
.lesson-nine-call-notes,
.lesson-nine-convention-grid {
  display: grid;
  min-width: 0;
  gap: 14px;
}

.lesson-nine-review,
.lesson-nine-call-notes,
.lesson-nine-convention-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-nine-review article,
.lesson-nine-call-notes article,
.lesson-nine-convention-grid article {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  overflow-wrap: anywhere;
}

.lesson-nine-review article > span,
.lesson-nine-call-notes article > span,
.lesson-nine-convention-grid article > span {
  display: block;
  margin-bottom: 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.lesson-nine-review article > strong,
.lesson-nine-call-notes article > strong,
.lesson-nine-convention-grid article > strong {
  display: block;
  font-size: 20px;
  line-height: 1.4;
}

.lesson-nine-review article > p,
.lesson-nine-call-notes article > p,
.lesson-nine-convention-grid article > p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-nine-page .lesson-nine-convention-grid article > span {
  font-size: 24px;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0;
}

.lesson-nine-page .rule-callout {
  margin-top: 18px;
}

.lesson-nine-initial-table,
.lesson-nine-legality-table {
  margin-bottom: 18px;
}

.lesson-nine-initial-table .opening-table__row {
  grid-template-columns: minmax(100px, 0.55fr) minmax(110px, 0.65fr) minmax(160px, 0.9fr) minmax(260px, 1.6fr);
}

.lesson-nine-legality-table .opening-table__row {
  grid-template-columns: minmax(105px, 0.55fr) minmax(135px, 0.7fr) repeat(2, minmax(190px, 1fr));
}

.lesson-nine-colored-trees {
  display: grid;
  min-width: 0;
  gap: 22px;
}

.lesson-nine-colored-tree {
  display: grid;
  min-width: 0;
  padding: 20px;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.48);
}

.lesson-nine-colored-tree__heading {
  min-width: 0;
  grid-column: 1 / -1;
}

.lesson-nine-colored-tree__heading .eyebrow,
.lesson-nine-colored-tree__heading h3,
.lesson-nine-colored-tree__heading p {
  margin: 0;
}

.lesson-nine-colored-tree__heading h3 {
  margin-top: 5px;
  font-size: 23px;
  line-height: 1.35;
}

.lesson-nine-colored-tree__heading h3 + p {
  margin-top: 7px;
  color: var(--ink-soft);
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.lesson-nine-colored-table {
  min-width: 0;
  align-self: start;
}

.lesson-nine-colored-table .opening-table__row {
  grid-template-columns: minmax(165px, 1.1fr) repeat(2, minmax(110px, 0.75fr));
}

.lesson-nine-boundary {
  min-width: 0;
  margin: 18px 0 22px;
  padding: 18px 20px;
  border: 1px solid rgba(165, 56, 73, 0.22);
  border-radius: 18px;
  background: rgba(248, 223, 215, 0.7);
}

.lesson-nine-boundary strong {
  display: block;
  color: #8c3341;
  font-size: 18px;
}

.lesson-nine-boundary p {
  margin: 7px 0 0;
  color: var(--ink-soft);
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.lesson-nine-double-negative {
  display: grid;
  min-width: 0;
  padding: 22px;
  grid-template-columns: minmax(190px, 0.65fr) minmax(0, 1.35fr);
  gap: 20px;
  border: 1px solid rgba(97, 127, 174, 0.22);
  border-radius: 20px;
  background: rgba(220, 230, 244, 0.68);
}

.lesson-nine-double-negative h3 {
  margin: 0;
  font-size: 21px;
  line-height: 1.4;
}

.lesson-nine-double-negative ol {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 9px;
  list-style: none;
}

.lesson-nine-double-negative li {
  display: grid;
  min-width: 0;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: start;
  gap: 10px;
}

.lesson-nine-double-negative li > span,
.lesson-nine-priority article > span,
.lesson-nine-waiting-flow article > span,
.lesson-nine-branch-steps article > span {
  display: grid;
  width: 30px;
  aspect-ratio: 1;
  place-items: center;
  color: #fff;
  font-size: 13px;
  font-weight: 800;
}

.lesson-nine-double-negative li > span,
.lesson-nine-priority article > span,
.lesson-nine-waiting-flow article > span {
  border-radius: 999px;
  background: #2f6b58;
  clip-path: none;
}

.lesson-nine-branch-steps article > span {
  border-radius: 7px;
  background: #335f9c;
  clip-path: none;
}

.lesson-nine-double-negative li p,
.lesson-nine-double-negative > p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

.lesson-nine-double-negative > p {
  grid-column: 1 / -1;
  padding-top: 14px;
  border-top: 1px dashed rgba(97, 127, 174, 0.3);
}

.lesson-nine-priority,
.lesson-nine-waiting-flow {
  display: grid;
  min-width: 0;
  gap: 10px;
}

.lesson-nine-priority article,
.lesson-nine-waiting-flow article {
  display: grid;
  min-width: 0;
  padding: 16px 18px;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: start;
  gap: 13px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
}

.lesson-nine-priority strong,
.lesson-nine-waiting-flow strong {
  display: block;
  font-size: 17px;
  line-height: 1.45;
}

.lesson-nine-priority p,
.lesson-nine-waiting-flow p {
  margin: 4px 0 0;
  color: var(--ink-soft);
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.lesson-nine-subtitle {
  margin: 30px 0 14px;
  font-size: 21px;
}

.lesson-nine-call-notes,
.lesson-nine-convention-grid {
  margin-top: 18px;
}

.lesson-nine-call-notes {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-nine-convention-grid--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-nine-convention-grid--four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.lesson-nine-convention-grid--five {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.lesson-nine-waiting-flow {
  grid-template-columns: minmax(0, 1fr);
}

.lesson-nine-waiting-branches {
  display: grid;
  min-width: 0;
  gap: 22px;
}

.lesson-nine-waiting-branch {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.48);
}

.lesson-nine-waiting-branch__heading {
  display: grid;
  min-width: 0;
  margin-bottom: 16px;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: center;
  gap: 13px;
}

.lesson-nine-waiting-branch__number {
  display: grid;
  width: 46px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 999px;
  background: #2f6b58;
  clip-path: none;
  color: #fff;
  font-size: 20px;
  font-weight: 900;
}

.lesson-nine-waiting-branch .lesson-nine-subtitle {
  min-width: 0;
  margin: 0;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.lesson-nine-branch-steps {
  display: grid;
  min-width: 0;
  gap: 10px;
}

.lesson-nine-major-followup-title {
  margin: 10px 0 2px;
  padding-top: 16px;
  border-top: 1px dashed rgba(47, 107, 88, 0.22);
}

.lesson-nine-major-followup-list {
  display: grid;
  min-width: 0;
  margin: 0;
  padding: 0;
  gap: 10px;
  list-style: none;
}

.lesson-nine-major-followup-list li {
  position: relative;
  min-width: 0;
  padding-left: 20px;
}

.lesson-nine-major-followup-list li::before {
  position: absolute;
  top: 0.62em;
  left: 2px;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #2f6b58;
  content: "";
}

.lesson-nine-branch-steps--continued {
  margin-top: 18px;
}

.lesson-nine-branch-steps article {
  display: grid;
  min-width: 0;
  padding: 16px 18px;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: start;
  gap: 13px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
}

.lesson-nine-branch-steps article > div {
  min-width: 0;
}

.lesson-nine-branch-steps strong {
  display: block;
  font-size: 17px;
  line-height: 1.45;
}

.lesson-nine-branch-steps p {
  margin: 4px 0 0;
  color: var(--ink-soft);
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.lesson-nine-step-title {
  margin: 24px 0 12px;
  font-size: 18px;
  line-height: 1.45;
}

.lesson-nine-waiting-table,
.lesson-nine-stayman-table {
  min-width: 0;
  margin-top: 18px;
}

.lesson-nine-waiting-table .opening-table__row {
  grid-template-columns: minmax(170px, 0.8fr) minmax(120px, 0.55fr) minmax(0, 1.65fr);
}

.lesson-nine-stayman-table .opening-table__row {
  grid-template-columns: minmax(110px, 0.5fr) minmax(190px, 1fr) repeat(2, minmax(180px, 1fr));
}

.lesson-nine-followup-copy {
  margin-top: 20px;
  margin-bottom: 0;
}

.lesson-nine-fit-note {
  display: grid;
  min-width: 0;
  margin-top: 20px;
  padding: 18px 20px;
  grid-template-columns: minmax(150px, 0.35fr) minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  border: 1px solid rgba(43, 93, 78, 0.24);
  border-left: 4px solid var(--green);
  border-radius: 12px;
  background: rgba(226, 238, 231, 0.58);
}

.lesson-nine-fit-note strong {
  font-size: 18px;
  line-height: 1.4;
}

.lesson-nine-fit-note p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

@media (max-width: 760px) {
  .lesson-nine-review,
  .lesson-nine-call-notes,
  .lesson-nine-convention-grid,
  .lesson-nine-waiting-flow {
    grid-template-columns: 1fr;
  }

  .lesson-nine-double-negative {
    grid-template-columns: 1fr;
  }

  .lesson-nine-fit-note {
    grid-template-columns: 1fr;
  }

  .lesson-nine-colored-tree {
    grid-template-columns: 1fr;
  }

  .lesson-nine-initial-table .opening-table__head,
  .lesson-nine-legality-table .opening-table__head,
  .lesson-nine-colored-table .opening-table__head,
  .lesson-nine-waiting-table .opening-table__head,
  .lesson-nine-stayman-table .opening-table__head {
    display: none;
  }

  .lesson-nine-initial-table .opening-table__row,
  .lesson-nine-legality-table .opening-table__row,
  .lesson-nine-colored-table .opening-table__row,
  .lesson-nine-waiting-table .opening-table__row,
  .lesson-nine-stayman-table .opening-table__row {
    grid-template-columns: 1fr;
  }

  .lesson-nine-initial-table .opening-table__row > * + *,
  .lesson-nine-legality-table .opening-table__row > * + *,
  .lesson-nine-colored-table .opening-table__row > * + *,
  .lesson-nine-waiting-table .opening-table__row > * + *,
  .lesson-nine-stayman-table .opening-table__row > * + * {
    border-top: 1px dashed var(--line);
    border-left: 0;
  }
}

@media (max-width: 640px) {
  .lesson-nine-page .bidding-panel__levels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lesson-nine-page .lesson-nine-convention-grid article > span {
    font-size: 22px;
  }

  .lesson-nine-review article,
  .lesson-nine-call-notes article,
  .lesson-nine-convention-grid article,
  .lesson-nine-double-negative,
  .lesson-nine-priority article,
  .lesson-nine-waiting-flow article,
  .lesson-nine-branch-steps article,
  .lesson-nine-boundary,
  .lesson-nine-waiting-branch {
    padding: 16px;
  }

  .lesson-nine-waiting-branch__heading {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 11px;
  }

  .lesson-nine-waiting-branch__number {
    width: 40px;
    font-size: 18px;
  }

}

.lesson-ten-page .bidding-panel__levels {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.lesson-ten-intro {
  max-width: 920px;
  margin: 0 0 22px;
}

.lesson-ten-intro p,
.lesson-ten-table-note {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.7;
}

.lesson-ten-rule-grid,
.lesson-ten-two-column,
.lesson-ten-fournt-grid,
.lesson-ten-teaching-examples {
  display: grid;
  min-width: 0;
  gap: 14px;
}

.lesson-ten-rule-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-ten-two-column {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.lesson-ten-fournt-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0 0 24px;
}

.lesson-ten-teaching-examples {
  margin: 0 0 24px;
}

.lesson-ten-rule-grid article,
.lesson-ten-two-column > article,
.lesson-ten-fournt-grid > article,
.lesson-ten-teaching-example {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
  overflow-wrap: anywhere;
}

.lesson-ten-rule-grid article > span {
  display: block;
  margin-bottom: 8px;
  color: var(--green);
  font-size: 15px;
  font-weight: 800;
}

.lesson-ten-rule-grid strong,
.lesson-ten-two-column h3,
.lesson-ten-fournt-grid h3,
.lesson-ten-teaching-example h3,
.lesson-ten-variants h3 {
  display: block;
  margin: 0;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.42;
}

.lesson-ten-rule-grid p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-ten-fournt-grid .auction-table {
  margin: 14px 0;
}

.lesson-ten-page .lesson-ten-rkcb-question-call {
  color: #153f70;
  font-weight: 900;
  background: #dcecff;
  box-shadow: inset 0 0 0 2px #3473ad;
}

.lesson-ten-page .lesson-ten-rkcb-answer-call {
  color: #18543f;
  font-weight: 900;
  background: #ddf3e7;
  box-shadow: inset 0 0 0 2px #388467;
}

.lesson-ten-fournt-grid p,
.lesson-ten-key-card-copy p,
.lesson-ten-response-copy p {
  color: var(--ink-soft);
  line-height: 1.68;
}

.lesson-ten-key-card-copy,
.lesson-ten-response-copy {
  margin-top: 4px;
}

.lesson-ten-key-card-copy h3,
.lesson-ten-response-copy h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 22px;
}

.lesson-ten-teaching-example {
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.28fr);
  gap: 18px;
  align-items: start;
}

.lesson-ten-teaching-example__copy > p {
  margin: 10px 0 16px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-ten-teaching-example h4 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 16px;
}

.lesson-ten-teaching-example ul {
  margin: 0;
  padding-left: 1.2em;
}

.lesson-ten-teaching-example li {
  margin: 7px 0;
  color: var(--ink-soft);
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.lesson-ten-teaching-example .bridge-hand {
  margin: 0;
  padding: 16px;
  box-shadow: none;
}

.lesson-ten-variants {
  min-width: 0;
  margin: 18px 0 22px;
  padding: 20px;
  border: 1px solid rgba(63, 128, 109, 0.26);
  border-radius: 16px;
  background: rgba(233, 243, 237, 0.74);
}

.lesson-ten-variants h3 {
  color: var(--green);
}

.lesson-ten-variants__intro,
.lesson-ten-followup-grid > article > p,
.lesson-ten-depo-note p {
  color: var(--ink-soft);
  line-height: 1.65;
}

.lesson-ten-followup-grid {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.lesson-ten-followup-grid > article,
.lesson-ten-depo-note {
  min-width: 0;
  padding: 18px;
  border: 1px solid rgba(63, 128, 109, 0.24);
  border-radius: 14px;
  background: var(--paper);
}

.lesson-ten-followup-grid h4 {
  margin: 0;
  color: var(--ink);
  font-size: 18px;
}

.lesson-ten-followup-table {
  margin: 12px 0 16px;
}

.lesson-ten-followup-table .opening-table__row {
  grid-template-columns: minmax(180px, 0.9fr) minmax(0, 1.1fr);
}

.lesson-ten-followup-grid .lesson-ten-teaching-example {
  margin-top: 14px;
  padding: 16px;
  background: rgba(247, 250, 248, 0.92);
}

.lesson-ten-depo-note {
  margin-top: 14px;
}

.lesson-ten-depo-note {
  border-style: dashed;
}

.lesson-ten-depo-note strong {
  color: var(--green);
}

.lesson-ten-depo-note p {
  margin: 6px 0 0;
}

.lesson-ten-table-note {
  margin: 8px 0 14px;
}

.lesson-ten-gerber-table,
.lesson-ten-quantitative-table,
.lesson-ten-rkcb-table {
  margin-top: 14px;
}

.lesson-ten-gerber-table .opening-table__row {
  grid-template-columns: minmax(100px, 0.62fr) minmax(0, 1.38fr);
}

.lesson-ten-quantitative-table .opening-table__row {
  grid-template-columns: minmax(190px, 1.1fr) repeat(2, minmax(150px, 1fr));
}

.lesson-ten-rkcb-table .opening-table__row {
  grid-template-columns: minmax(70px, 0.42fr) minmax(150px, 0.95fr) minmax(175px, 1.3fr);
}

@media (max-width: 760px) {
  .lesson-ten-rule-grid,
  .lesson-ten-two-column,
  .lesson-ten-fournt-grid,
  .lesson-ten-teaching-example {
    grid-template-columns: 1fr;
  }

  .lesson-ten-gerber-table .opening-table__head,
  .lesson-ten-followup-table .opening-table__head,
  .lesson-ten-quantitative-table .opening-table__head,
  .lesson-ten-rkcb-table .opening-table__head {
    display: none;
  }

  .lesson-ten-gerber-table .opening-table__row,
  .lesson-ten-followup-table .opening-table__row,
  .lesson-ten-quantitative-table .opening-table__row,
  .lesson-ten-rkcb-table .opening-table__row {
    grid-template-columns: 1fr;
  }

  .lesson-ten-gerber-table .opening-table__row > * + *,
  .lesson-ten-followup-table .opening-table__row > * + *,
  .lesson-ten-quantitative-table .opening-table__row > * + *,
  .lesson-ten-rkcb-table .opening-table__row > * + * {
    border-top: 1px dashed var(--line);
    border-left: 0;
  }
}

@media (max-width: 640px) {
  .lesson-ten-page .bidding-panel__levels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lesson-ten-rule-grid article,
  .lesson-ten-two-column > article,
  .lesson-ten-fournt-grid > article,
  .lesson-ten-teaching-example,
  .lesson-ten-variants,
  .lesson-ten-followup-grid > article,
  .lesson-ten-depo-note {
    padding: 16px;
  }
}

@media (prefers-contrast: more) {
  .lesson-ten-page .lesson-ten-rkcb-question-call {
    outline: 3px dashed currentColor;
    outline-offset: -5px;
  }

  .lesson-ten-page .lesson-ten-rkcb-answer-call {
    outline: 3px double currentColor;
    outline-offset: -5px;
  }
}

@media (forced-colors: active) {
  .lesson-ten-page .lesson-ten-rkcb-question-call {
    border: 3px dashed ButtonText;
  }

  .lesson-ten-page .lesson-ten-rkcb-answer-call {
    border: 3px double ButtonText;
  }
}

/* 1-01 逐門盤點贏墩 */
.play-lesson-page .learning-goals ul {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.play-lesson-copy {
  max-width: 780px;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.8;
}

.play-lesson-copy p:last-child {
  margin-bottom: 0;
}

.play-holding-examples {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.play-holding-example {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
}

.play-holding-example__cards {
  display: grid;
  min-width: 0;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 7px 12px;
  align-items: baseline;
}

.play-holding-example__cards span {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 750;
}

.play-holding-example__cards strong {
  min-width: 0;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 18px;
  overflow-wrap: anywhere;
}

.play-holding-example__answer {
  width: fit-content;
  margin: 16px 0 10px;
  padding: 7px 11px;
  border-radius: 999px;
  background: var(--green-light);
  color: var(--green);
  font-weight: 800;
}

.play-holding-example > p:last-child {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.65;
}

.play-definition-grid,
.play-complex-results {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.play-definition-grid article,
.play-complex-results article {
  min-width: 0;
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.play-definition-grid h3,
.play-complex-results h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.play-definition-grid article > p:last-child {
  margin-bottom: 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.play-formula {
  align-items: flex-start;
}

.play-complex-results {
  margin-top: 16px;
}

.play-complex-results p {
  display: flex;
  margin-bottom: 10px;
  flex-wrap: wrap;
  gap: 7px;
}

.play-complex-results p strong {
  padding: 6px 9px;
  border-radius: 9px;
  background: var(--blue-light);
  font-size: 14px;
}

.play-complex-results small {
  color: var(--ink-soft);
  line-height: 1.55;
}

.play-full-example {
  display: grid;
  min-width: 0;
  gap: 14px;
}

.play-inventory-table {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
}

.play-inventory-table__row {
  display: grid;
  min-width: 0;
  grid-template-columns: 0.6fr repeat(3, minmax(0, 1fr));
}

.play-inventory-table__row + .play-inventory-table__row {
  border-top: 1px solid var(--line);
}

.play-inventory-table__row > * {
  min-width: 0;
  padding: 11px 10px;
  text-align: center;
  overflow-wrap: anywhere;
}

.play-inventory-table__row > * + * {
  border-left: 1px solid var(--line);
}

.play-inventory-table__head {
  background: var(--green-light);
  font-size: 13px;
  font-weight: 800;
}

.play-count-quiz .quiz-option span,
.play-count-quiz [data-feedback-answer],
.play-count-quiz [data-feedback-explanation],
.play-count-quiz .quiz-result__details p {
  white-space: pre-line;
}

.quiz-options--number-grid {
  grid-template-columns: minmax(0, 1fr);
}

.quiz-number-grid {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
  overflow: hidden;
}

.quiz-number-grid__row {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(74px, 0.78fr) repeat(3, minmax(0, 1fr));
  align-items: stretch;
}

.quiz-number-grid__row + .quiz-number-grid__row {
  border-top: 1px solid var(--line);
}

.quiz-number-grid__row > strong,
.quiz-number-grid__head > span {
  display: flex;
  min-width: 0;
  padding: 10px 7px;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow-wrap: anywhere;
}

.quiz-number-grid__head {
  background: var(--green-light);
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}

.quiz-number-grid__row > label {
  display: flex;
  min-width: 0;
  padding: 7px;
  align-items: center;
  border-left: 1px solid var(--line);
}

.quiz-number-grid input {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  padding: 7px 3px;
  border: 1px solid #9eb5ac;
  border-radius: 9px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  font-weight: 750;
  text-align: center;
}

.quiz-number-grid input:focus-visible {
  border-color: var(--green);
  outline: 3px solid rgba(53, 104, 89, 0.2);
  outline-offset: 1px;
}

@media (max-width: 820px) {
  .play-lesson-page .learning-goals ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .play-lesson-page .learning-goals ul,
  .play-holding-examples,
  .play-definition-grid,
  .play-complex-results {
    grid-template-columns: 1fr;
  }

  .play-inventory-table__row {
    grid-template-columns: 0.52fr repeat(3, minmax(0, 1fr));
  }

  .play-inventory-table__row > * {
    padding: 10px 5px;
    font-size: 13px;
  }

  .quiz-number-grid__row {
    grid-template-columns: minmax(62px, 0.72fr) repeat(3, minmax(0, 1fr));
  }

  .quiz-number-grid__row > strong,
  .quiz-number-grid__head > span {
    padding-inline: 4px;
    font-size: 12px;
  }

  .quiz-number-grid__row > label {
    padding: 5px;
  }
}

/* 1-02 建立牌組重整 */
.play-definition-grid.play-establish-three-things {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.play-combined-basics .play-lesson-copy {
  margin-top: 18px;
}

.play-combined-basics .play-formula {
  margin-top: 16px;
}

.play-combined-basics .play-count-table {
  margin-top: 22px;
}

.play-suit-cross {
  display: grid;
  min-width: 0;
  padding: 14px;
  grid-template-columns: minmax(0, 1fr) 54px minmax(0, 1fr);
  grid-template-areas:
    "partner partner partner"
    "left suit right"
    "self self self";
  gap: 11px 10px;
  align-items: center;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    radial-gradient(circle at center, rgba(217, 235, 226, 0.72), transparent 44%),
    var(--paper);
}

.play-suit-cross__seat {
  display: flex;
  min-width: 0;
  padding: 10px 12px;
  flex-direction: column;
  gap: 3px;
  border: 1px solid rgba(53, 104, 89, 0.16);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.86);
  text-align: center;
}

.play-suit-cross__seat--partner {
  width: min(300px, 72%);
  grid-area: partner;
  justify-self: center;
}

.play-suit-cross__seat--left {
  grid-area: left;
}

.play-suit-cross__seat--right {
  grid-area: right;
}

.play-suit-cross__seat--self {
  width: min(300px, 72%);
  grid-area: self;
  justify-self: center;
}

.play-suit-cross__seat span {
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 800;
}

.play-suit-cross__seat strong {
  min-width: 0;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 18px;
  letter-spacing: 0.025em;
  line-height: 1.35;
  white-space: nowrap;
}

.play-suit-cross__suit {
  display: grid;
  width: 48px;
  height: 48px;
  grid-area: suit;
  place-items: center;
  justify-self: center;
  border-radius: 50%;
  background: var(--green);
  color: white;
  font-size: 24px;
}

.play-opening-condition {
  margin: 14px 0 8px;
}

.play-opening-explanation {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.7;
}

.play-opening-explanation + .play-opening-explanation {
  margin-top: 8px;
}

.play-long-hand-note {
  margin: -8px 0 18px;
  color: var(--ink-soft);
  font-weight: 750;
}

.play-established-cards {
  color: var(--green);
  font-weight: 800;
}

.play-calculation-flow {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 24px;
}

.play-calculation-flow__step {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 128px;
  padding: 13px 10px;
  flex-direction: column;
  gap: 9px;
  align-items: center;
  justify-content: flex-start;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  line-height: 1.5;
  text-align: center;
  overflow-wrap: anywhere;
}

.play-calculation-flow__step b {
  display: grid;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: white;
  font-size: 13px;
}

.play-calculation-flow__step:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -19px;
  color: var(--green);
  content: "→";
  font-size: 20px;
  font-weight: 900;
  transform: translateY(-50%);
}

.play-calculation-flow + .play-formula {
  margin-top: 20px;
}

.play-example-groups,
.play-likely-examples {
  display: grid;
  min-width: 0;
  gap: 24px;
}

.play-example-group {
  min-width: 0;
  padding-top: 2px;
}

.play-example-group + .play-example-group {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.play-example-group > h3 {
  margin-bottom: 18px;
  color: var(--green);
  font-size: 22px;
}

.play-example-group > .play-section-lead {
  margin-top: -10px;
}

.play-holding-example--cross > h3 {
  margin-bottom: 14px;
  font-size: 18px;
}

@media (max-width: 820px) {
  .play-definition-grid.play-establish-three-things {
    grid-template-columns: 1fr;
  }

  .play-calculation-flow {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .play-calculation-flow__step {
    min-height: 0;
    padding: 12px 14px;
    flex-direction: row;
    text-align: left;
  }

  .play-calculation-flow__step:not(:last-child)::after {
    top: auto;
    right: 50%;
    bottom: -25px;
    content: "↓";
    transform: translateX(50%);
  }
}

@media (max-width: 640px) {
  .play-suit-cross {
    padding: 10px;
    grid-template-columns: minmax(0, 1fr) 42px minmax(0, 1fr);
    gap: 9px 7px;
  }

  .play-suit-cross__seat {
    padding: 8px 5px;
  }

  .play-suit-cross__seat--partner,
  .play-suit-cross__seat--self {
    width: min(250px, 82%);
  }

  .play-suit-cross__seat strong {
    font-size: 15px;
    letter-spacing: 0;
  }

  .play-suit-cross__suit {
    width: 38px;
    height: 38px;
    font-size: 19px;
  }

  .play-holding-example--cross {
    padding: 14px;
  }
}

/* 1-03 基本偷牌 */
.finesse-opening__hands {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 520px);
  justify-content: center;
  align-items: center;
  gap: 16px;
}

.finesse-opening__hand,
.finesse-opening__question {
  width: 100%;
}

.finesse-opening__question {
  display: grid;
  min-width: 0;
  padding: 16px;
  place-items: center;
  gap: 4px;
  border-radius: 16px;
  background: var(--green-light);
  text-align: center;
}

.finesse-opening__question span {
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}

.finesse-opening__question strong {
  line-height: 1.45;
}

.finesse-demo-hand {
  display: flex;
  min-width: 0;
  padding: 13px 15px;
  flex-direction: column;
  gap: 5px;
  border: 1px solid rgba(53, 104, 89, 0.18);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.84);
  text-align: center;
}

.finesse-demo-hand > span {
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 800;
}

.finesse-demo-hand > strong {
  color: #202d29;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 19px;
  line-height: 1.4;
  white-space: nowrap;
}

.finesse-revealed-deal {
  display: grid;
  min-width: 0;
  padding: 16px;
  grid-template-columns: minmax(0, 1fr) 54px minmax(0, 1fr);
  grid-template-areas:
    "north north north"
    "west mark east"
    "south south south";
  gap: 11px 12px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    radial-gradient(circle at center, rgba(217, 235, 226, 0.76), transparent 43%),
    var(--paper);
}

.finesse-revealed-deal__north,
.finesse-revealed-deal__south {
  width: min(330px, 74%);
  justify-self: center;
}

.finesse-revealed-deal__north { grid-area: north; }
.finesse-revealed-deal__west { grid-area: west; }
.finesse-revealed-deal__east { grid-area: east; }
.finesse-revealed-deal__south { grid-area: south; }

.finesse-revealed-deal__mark {
  display: grid;
  width: 48px;
  height: 48px;
  grid-area: mark;
  place-items: center;
  justify-self: center;
  border-radius: 50%;
  background: #202d29;
  color: #fff;
  font-size: 25px;
}

.finesse-decision-deal {
  display: grid;
  min-width: 0;
  margin-top: 20px;
  padding: 18px;
  grid-template-columns: minmax(130px, 0.72fr) minmax(430px, 2.25fr) minmax(130px, 0.72fr);
  grid-template-areas:
    ". north ."
    "west center east"
    ". south .";
  align-items: center;
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(145deg, rgba(232, 242, 237, 0.86), rgba(255, 253, 248, 0.94));
}

.finesse-decision-deal__north,
.finesse-decision-deal__south {
  width: min(360px, 78%);
  justify-self: center;
}

.finesse-decision-deal__north { grid-area: north; }
.finesse-decision-deal__west { grid-area: west; }
.finesse-decision-deal__center { grid-area: center; }
.finesse-decision-deal__east { grid-area: east; }
.finesse-decision-deal__south { grid-area: south; }

.finesse-decision-deal__center {
  position: relative;
  width: 100%;
  min-width: 0;
  min-height: 420px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.72);
}

.finesse-clockwise-arrow {
  position: absolute;
  inset: 22px;
  width: calc(100% - 44px);
  height: calc(100% - 44px);
  overflow: visible;
}

.finesse-clockwise-arrow path[data-clockwise-arrow] {
  fill: none;
  stroke: var(--green);
  stroke-width: 8;
  stroke-linecap: round;
  opacity: 0.72;
}

.finesse-clockwise-arrow marker path {
  fill: var(--green);
}

.finesse-clockwise-steps {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.finesse-clockwise-steps li {
  position: absolute;
  display: grid;
  width: min(180px, 43%);
  min-height: 58px;
  padding: 9px 10px;
  grid-template-columns: 25px minmax(0, 1fr);
  align-items: center;
  gap: 7px;
  border: 1px solid rgba(53, 104, 89, 0.22);
  border-radius: 14px;
  background: rgba(255, 253, 248, 0.96);
  box-shadow: 0 6px 16px rgba(31, 67, 56, 0.11);
  color: var(--ink);
  font-size: 13px;
  font-weight: 750;
  line-height: 1.45;
}

.finesse-clockwise-steps b {
  display: grid;
  width: 25px;
  height: 25px;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
}

.finesse-clockwise-steps__one { left: 29%; bottom: 6px; }
.finesse-clockwise-steps__two { left: 0; bottom: 25%; }
.finesse-clockwise-steps__three { left: 8%; top: 8px; }
.finesse-clockwise-steps__four { right: 5%; top: 8px; }
.finesse-clockwise-steps__five { right: 0; bottom: 25%; }

.finesse-sequence {
  display: flex;
  min-width: 0;
  margin: 20px 0 14px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  flex-wrap: wrap;
}

.finesse-sequence span {
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  font-size: 14px;
  font-weight: 750;
}

.finesse-sequence b { color: var(--green); }

.finesse-definition p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.78;
}

.finesse-combined-grid {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.finesse-combined-card {
  display: grid;
  min-width: 0;
  padding: 20px;
  gap: 13px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.finesse-combined-card h3,
.finesse-combined-card p,
.finesse-combined-card ul { margin: 0; }

.finesse-combined-card h3 { font-size: 21px; }

.finesse-combined-hands {
  display: grid;
  gap: 9px;
}

.finesse-combined-card > p,
.finesse-combined-card li {
  color: var(--ink-soft);
  line-height: 1.65;
}

.finesse-combined-card ul {
  display: grid;
  padding-left: 1.25em;
  gap: 7px;
}

.finesse-combined-card .finesse-combined-formula {
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--green-light);
  color: var(--green);
  font-weight: 800;
}

.finesse-advanced-grid {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.finesse-advanced-card {
  display: grid;
  min-width: 0;
  padding: 17px;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.finesse-advanced-card h3,
.finesse-advanced-card p { margin: 0; }

.finesse-advanced-card p,
.finesse-advanced-note {
  color: var(--ink-soft);
  line-height: 1.65;
}

.finesse-advanced-note {
  margin: 16px 0 0;
  padding: 13px 15px;
  border-radius: 14px;
  background: var(--yellow-light);
}

.finesse-pattern-grid {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.finesse-pattern-grid article {
  display: grid;
  min-width: 0;
  padding: 17px;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.finesse-pattern-grid h3,
.finesse-pattern-grid p { margin: 0; }

.finesse-pattern-grid article > p:last-child {
  color: var(--ink-soft);
  line-height: 1.6;
}

.finesse-quiz-start {
  display: flex;
  min-height: 92px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.finesse-quiz-start p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

.finesse-trick-progress {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--green-light);
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}

.finesse-progress-stats {
  display: flex;
  margin: 12px 0 0;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  flex-wrap: wrap;
  color: var(--ink-soft);
  font-size: 14px;
}

.finesse-progress-stats strong { color: var(--green); }

.finesse-table-prompt {
  margin: 14px 0;
  padding: 10px 13px;
  border-radius: 12px;
  background: #fff2bd;
  color: #594514;
  font-weight: 800;
  line-height: 1.55;
  text-align: center;
}

.finesse-table {
  display: grid;
  min-width: 0;
  padding: 14px;
  grid-template-areas:
    "north"
    "middle"
    "south";
  gap: 12px;
  overflow: hidden;
  border: 1px solid rgba(18, 52, 43, 0.28);
  border-radius: 22px;
  background:
    radial-gradient(circle at 50% 48%, rgba(255, 255, 255, 0.12), transparent 34%),
    linear-gradient(145deg, #3e7765, #285647);
  box-shadow: inset 0 0 0 4px rgba(255, 255, 255, 0.08);
}

.finesse-table[data-interaction-locked="true"] {
  cursor: wait;
  user-select: none;
}

.finesse-table__north,
.finesse-table__south {
  width: min(440px, 76%);
  min-width: 0;
  justify-self: center;
}

.finesse-table__north { grid-area: north; }
.finesse-table__south { grid-area: south; }

.finesse-table__middle {
  display: grid;
  min-width: 0;
  grid-area: middle;
  grid-template-columns: minmax(100px, 0.72fr) minmax(230px, 1.55fr) minmax(100px, 0.72fr);
  align-items: center;
  gap: 10px;
}

.finesse-hand {
  display: grid;
  width: 100%;
  min-width: 0;
  min-height: 100px;
  padding: 10px 12px;
  place-items: center;
  gap: 8px;
  border: 2px solid transparent;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  font: inherit;
  transition: opacity 160ms ease, border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

button.finesse-hand { cursor: pointer; }

.finesse-hand.is-active {
  border-color: #f5ca4f;
  box-shadow: 0 0 0 3px rgba(245, 202, 79, 0.34);
}

button.finesse-hand:hover,
button.finesse-hand:focus-visible {
  transform: translateY(-2px);
  outline: 3px solid #f5ca4f;
  outline-offset: 2px;
}

.finesse-hand.is-inactive { opacity: 0.52; }

.finesse-hand__label {
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 800;
}

.finesse-hand__cards {
  display: flex;
  min-width: 0;
  align-items: flex-end;
  justify-content: center;
  gap: 7px;
}

.finesse-hand__empty {
  color: var(--ink-soft);
  font-size: 13px;
}

.finesse-card {
  display: inline-flex;
  width: 48px;
  height: 68px;
  padding: 7px 5px;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: flex-start;
  border: 1px solid rgba(27, 42, 37, 0.24);
  border-radius: 8px;
  background: #fffdf8;
  box-shadow: 0 3px 7px rgba(18, 35, 30, 0.16);
  color: #1e2925;
  font: inherit;
  font-size: 18px;
  font-weight: 800;
  line-height: 1;
}

button.finesse-card {
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease;
}

button.finesse-card:hover,
button.finesse-card:focus-visible {
  transform: translateY(-7px);
  outline: 3px solid #f5ca4f;
  outline-offset: 2px;
  box-shadow: 0 9px 14px rgba(18, 35, 30, 0.2);
}

.finesse-card > span {
  font-size: 14px;
  font-weight: 700;
}

.finesse-card--static { cursor: default; }

.finesse-discard {
  display: inline-grid;
  min-width: 92px;
  min-height: 48px;
  padding: 9px 16px;
  place-items: center;
  border: 2px dashed rgba(33, 85, 69, 0.48);
  border-radius: 12px;
  background: #fffdf8;
  color: var(--green);
  font: inherit;
  font-size: 15px;
  font-weight: 900;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.finesse-discard:hover,
.finesse-discard:focus-visible {
  transform: translateY(-4px);
  outline: 3px solid #f5ca4f;
  outline-offset: 2px;
  box-shadow: 0 8px 13px rgba(18, 35, 30, 0.18);
}

.finesse-defender {
  display: grid;
  min-width: 0;
  min-height: 72px;
  padding: 10px 7px;
  place-items: center;
  align-content: center;
  gap: 3px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 13px;
  background: rgba(15, 45, 36, 0.46);
  color: #fff;
  text-align: center;
}

.finesse-defender strong {
  font-size: 12px;
  line-height: 1.4;
}

.finesse-defender span {
  color: rgba(255, 255, 255, 0.76);
  font-size: 11px;
}

.finesse-trick {
  display: grid;
  min-width: 0;
  min-height: 196px;
  padding: 8px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-areas:
    ". north ."
    "west . east"
    ". south .";
  gap: 4px;
  align-items: center;
  border: 1px dashed rgba(255, 255, 255, 0.42);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.06);
}

.finesse-trick__slot {
  display: grid;
  min-width: 0;
  min-height: 52px;
  place-items: center;
  align-content: center;
  gap: 2px;
  color: rgba(255, 255, 255, 0.72);
}

.finesse-trick__slot--north { grid-area: north; }
.finesse-trick__slot--west { grid-area: west; }
.finesse-trick__slot--east { grid-area: east; }
.finesse-trick__slot--south { grid-area: south; }

.finesse-trick__slot > span {
  font-size: 10px;
  font-weight: 800;
}

.finesse-trick__slot > i { font-style: normal; }

.finesse-trick__slot > strong {
  display: inline-flex;
  width: 38px;
  height: 52px;
  padding: 5px;
  flex-direction: column;
  align-items: flex-start;
  border-radius: 7px;
  background: #fffdf8;
  box-shadow: 0 5px 10px rgba(10, 28, 22, 0.25);
  color: #1e2925;
  font-size: 15px;
  line-height: 1;
  animation: finesse-card-arrive 180ms ease-out;
}

.finesse-trick__slot > strong.finesse-card--moving {
  position: relative;
  z-index: 3;
  animation: none;
  will-change: transform, opacity;
}

.finesse-trick__slot > strong.finesse-play--discard {
  place-content: center;
  align-items: center;
  border: 2px dashed rgba(33, 85, 69, 0.42);
  color: var(--green);
}

.finesse-trick__slot > strong small { font-size: 11px; }

@keyframes finesse-card-arrive {
  from { opacity: 0; transform: scale(0.82) translateY(5px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.finesse-trick-winner {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-radius: 13px;
  background: var(--blue-light);
  line-height: 1.6;
  text-align: center;
}

.finesse-table-actions {
  display: flex;
  margin-top: 12px;
  justify-content: flex-start;
}

.finesse-table-actions .quiz-button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.finesse-decision-score,
.finesse-result-analysis {
  margin-top: 14px;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
}

.finesse-decision-score h4,
.finesse-result-analysis h4 {
  margin-bottom: 13px;
  font-size: 20px;
}

.finesse-decision-score ul {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
  list-style: none;
}

.finesse-decision-score li {
  display: grid;
  min-width: 0;
  padding: 10px;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 3px 7px;
  border-radius: 12px;
  background: var(--green-light);
}

.finesse-decision-score li.is-incorrect { background: var(--coral-light); }

.finesse-decision-score li > span {
  grid-row: 1 / 3;
  font-size: 20px;
  font-weight: 900;
}

.finesse-decision-score li > small { color: var(--ink-soft); }

.finesse-result-analysis > p:not(.eyebrow) {
  color: var(--ink-soft);
  line-height: 1.7;
}

.finesse-unique-reason {
  display: grid;
  padding-top: 11px;
  gap: 3px;
  border-top: 1px solid var(--line);
}

.finesse-result-analysis + .quiz-button { margin-top: 14px; }

.play-question-outcome {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 14px;
}

.play-question-outcome__header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}

.play-question-outcome__summary { min-width: 0; }

.play-question-outcome__summary .eyebrow {
  margin-bottom: 3px;
  font-size: 12px;
}

.play-question-outcome__summary h4 {
  margin: 0;
  font-size: 18px;
  line-height: 1.35;
}

.play-question-outcome__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.play-question-outcome__actions .quiz-button {
  min-width: 0;
  padding: 10px 15px;
  white-space: nowrap;
}

.play-question-outcome__body {
  margin-top: 7px;
  color: var(--ink-soft);
  line-height: 1.55;
}

.play-question-outcome__body > p { margin: 0; }
.play-question-outcome__body > p + p { margin-top: 9px; }

.finesse-quiz-result > p:not(.eyebrow) {
  color: var(--ink-soft);
  line-height: 1.65;
}

@media (max-width: 820px) {
  .finesse-pattern-grid { grid-template-columns: 1fr; }

  .finesse-decision-deal {
    grid-template-columns: minmax(95px, 0.65fr) minmax(320px, 2fr) minmax(95px, 0.65fr);
  }

  .finesse-decision-deal__center { min-height: 390px; }

  .finesse-table__middle {
    grid-template-columns: minmax(82px, 0.62fr) minmax(190px, 1.6fr) minmax(82px, 0.62fr);
  }
}

@media (max-width: 640px) {
  .finesse-combined-grid,
  .finesse-advanced-grid {
    grid-template-columns: 1fr;
  }

  .finesse-opening__question {
    width: 100%;
    min-width: 0;
  }

  .finesse-decision-deal {
    padding: 11px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-areas:
      "north north"
      "west east"
      "center center"
      "south south";
    gap: 10px 8px;
  }

  .finesse-decision-deal__north,
  .finesse-decision-deal__south { width: min(280px, 92%); }

  .finesse-decision-deal__center { min-height: 430px; }

  .finesse-clockwise-arrow {
    inset: 30px 4px;
    width: calc(100% - 8px);
    height: calc(100% - 60px);
  }

  .finesse-clockwise-steps li {
    width: min(145px, 46%);
    min-height: 64px;
    padding: 8px;
    grid-template-columns: 22px minmax(0, 1fr);
    gap: 5px;
    font-size: 12px;
  }

  .finesse-clockwise-steps b {
    width: 22px;
    height: 22px;
  }

  .finesse-clockwise-steps__one { left: 27%; bottom: 0; }
  .finesse-clockwise-steps__two { left: 0; bottom: 25%; }
  .finesse-clockwise-steps__three { left: 4%; top: 0; }
  .finesse-clockwise-steps__four { right: 3%; top: 0; }
  .finesse-clockwise-steps__five { right: 0; bottom: 25%; }

  .finesse-revealed-deal {
    padding: 10px;
    grid-template-columns: minmax(0, 1fr) 40px minmax(0, 1fr);
    gap: 8px 6px;
  }

  .finesse-revealed-deal__north,
  .finesse-revealed-deal__south { width: min(250px, 84%); }

  .finesse-revealed-deal__mark {
    width: 36px;
    height: 36px;
    font-size: 19px;
  }

  .finesse-demo-hand { padding: 9px 6px; }
  .finesse-demo-hand > strong { font-size: 15px; }

  .finesse-quiz-start {
    align-items: stretch;
    flex-direction: column;
  }

  .finesse-progress-stats {
    align-items: flex-start;
    flex-direction: column;
  }

  .finesse-table {
    margin-inline: -8px;
    padding: 9px;
    gap: 8px;
    border-radius: 17px;
  }

  .finesse-table__north,
  .finesse-table__south { width: min(290px, 88%); }

  .finesse-table__middle {
    grid-template-columns: minmax(60px, 0.54fr) minmax(132px, 1.5fr) minmax(60px, 0.54fr);
    gap: 5px;
  }

  .finesse-hand {
    min-height: 84px;
    padding: 8px;
  }

  .finesse-hand__cards { gap: 5px; }

  .finesse-card {
    width: 39px;
    height: 56px;
    padding: 6px 4px;
    font-size: 15px;
  }

  .finesse-card > span { font-size: 11px; }

  .finesse-discard {
    min-width: 82px;
    min-height: 44px;
    padding: 7px 12px;
    font-size: 14px;
  }

  .finesse-defender {
    min-height: 68px;
    padding-inline: 3px;
  }

  .finesse-defender strong { font-size: 10px; }
  .finesse-defender span { font-size: 9px; }

  .finesse-trick {
    min-height: 164px;
    padding: 5px;
  }

  .finesse-trick__slot { min-height: 43px; }

  .finesse-trick__slot > strong {
    width: 31px;
    height: 43px;
    padding: 4px;
    font-size: 13px;
  }

  .finesse-trick__slot > strong small { font-size: 9px; }

  .finesse-decision-score ul { grid-template-columns: 1fr; }

  .finesse-decision-score li {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .finesse-decision-score li > span { grid-row: auto; }
}

@media (prefers-reduced-motion: reduce) {
  .finesse-card,
  .finesse-discard,
  .finesse-hand,
  .finesse-trick__slot > strong { transition: none; animation: none; }
}

/* 1-04 橋引 */
.bridge-example-grid,
.bridge-compare-grid {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.bridge-example-grid > article,
.bridge-compare-grid > article {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.bridge-example-grid h3,
.bridge-compare-grid h3,
.bridge-compare-grid p {
  margin: 0;
}

.bridge-example-grid h3,
.bridge-compare-grid h3 {
  font-size: 21px;
  line-height: 1.4;
}

.bridge-demo-pair {
  display: grid;
  min-width: 0;
  margin: 16px 0;
  grid-template-columns: minmax(0, 1fr);
  justify-items: stretch;
  gap: 6px;
}

.bridge-demo-pair__arrow {
  color: var(--green);
  font-size: 22px;
  line-height: 1;
  text-align: center;
}

.bridge-demo-hand {
  display: grid;
  min-width: 0;
  padding: 12px 14px;
  grid-template-columns: 68px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(53, 104, 89, 0.2);
  border-radius: 14px;
  background: #fffdf8;
}

.bridge-demo-hand > span {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
}

.bridge-demo-hand > strong {
  min-width: 0;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 18px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.bridge-demo-hand b {
  color: #202d29;
  white-space: nowrap;
}

.bridge-demo-hand b.is-red,
.bridge-card.is-red,
.finesse-trick__slot > strong.is-red {
  color: #b43242;
}

.bridge-demo-hand.is-muted,
.bridge-compare-grid .is-wrong .bridge-demo-hand:first-child {
  filter: grayscale(1);
  opacity: 0.5;
}

.bridge-demo-pair.is-established .bridge-demo-hand:first-child {
  border-color: #d7a716;
  box-shadow: 0 0 0 3px rgba(245, 202, 79, 0.27);
  background: #fff8d9;
}

.bridge-step-list {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 9px;
  list-style: none;
}

.bridge-step-list li {
  display: grid;
  min-width: 0;
  padding: 11px 12px;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 10px;
  border-radius: 13px;
  background: var(--green-light);
  line-height: 1.6;
}

.bridge-step-list b { color: var(--green); }

.bridge-break-example {
  margin: 18px 0 22px;
  padding: 20px;
  border: 1px solid rgba(198, 90, 77, 0.35);
  border-radius: 20px;
  background: #fff5f1;
}

.bridge-break-example > span {
  display: inline-block;
  margin-bottom: 9px;
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--coral-light);
  color: #8c3e34;
  font-size: 12px;
  font-weight: 900;
}

.bridge-break-example h3,
.bridge-recovery-title,
.bridge-card-example h3,
.bridge-inline-definition > h3 {
  margin: 0;
  font-size: 21px;
  line-height: 1.4;
}

.bridge-break-example .bridge-demo-pair {
  max-width: 560px;
}

.bridge-recovery-title {
  margin-bottom: 14px;
}

.bridge-inline-definition {
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.bridge-inline-definition .play-definition-card {
  margin-top: 14px;
}

.bridge-card-example {
  margin-top: 18px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.bridge-card-example > span {
  display: inline-block;
  margin-bottom: 9px;
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--green-light);
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
}

.bridge-card-example__defense {
  margin: 12px 0 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.bridge-defense-note,
.bridge-teaching-note {
  margin: 14px 0 0;
  padding: 13px 15px;
  border-left: 4px solid var(--green);
  border-radius: 12px;
  background: var(--green-light);
  color: var(--ink-soft);
  line-height: 1.65;
}

.bridge-card-example .bridge-timeline {
  margin-top: 18px;
}

.bridge-warning {
  margin: 14px 0 0;
  padding: 13px 15px;
  border-left: 4px solid #c65a4d;
  border-radius: 12px;
  background: var(--coral-light);
  color: #71342d;
  line-height: 1.65;
}

.bridge-teaching-table {
  margin-top: 16px;
  padding: 17px;
  border: 1px solid rgba(53, 104, 89, 0.2);
  border-radius: 18px;
  background: rgba(244, 249, 246, 0.78);
}

.bridge-definition p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.78;
}

.bridge-short-order,
.bridge-route {
  display: flex;
  min-width: 0;
  margin-top: 18px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  flex-wrap: wrap;
}

.bridge-short-order span,
.bridge-route span {
  display: inline-grid;
  min-height: 46px;
  padding: 9px 12px;
  place-items: center;
  gap: 2px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.4;
  text-align: center;
}

.bridge-short-order > b,
.bridge-route > b {
  color: var(--green);
  font-size: 20px;
}

.bridge-short-order .is-established,
.bridge-route span.is-bridge {
  border-color: #d7a716;
  background: #fff2bd;
  box-shadow: 0 0 0 3px rgba(245, 202, 79, 0.22);
}

.bridge-route small {
  color: #72560a;
  font-size: 11px;
  font-weight: 900;
}

.bridge-route-lessons {
  display: grid;
  margin-top: 18px;
  gap: 12px;
}

.bridge-route-lesson {
  display: grid;
  min-width: 0;
  padding: 15px 16px;
  grid-template-columns: minmax(150px, 0.46fr) minmax(0, 2fr);
  align-items: center;
  gap: 16px;
  border: 1px solid rgba(53, 104, 89, 0.24);
  border-radius: 16px;
  background: #f4faf6;
}

.bridge-route-lesson > div:first-child {
  min-width: 0;
}

.bridge-route-lesson > div:first-child > span {
  display: inline-block;
  margin-bottom: 5px;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--green-light);
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
}

.bridge-route-lesson h4 {
  margin: 0;
  color: var(--ink);
  font-size: 17px;
  line-height: 1.45;
}

.bridge-route-lesson .bridge-route {
  margin-top: 0;
  justify-content: flex-start;
}

.bridge-route-chain {
  display: grid;
  min-width: 0;
  gap: 7px;
}

.bridge-route-chain__next {
  width: fit-content;
  margin-left: 7px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(53, 104, 89, 0.1);
  color: var(--green);
  font-size: 11px;
  font-weight: 900;
}

.bridge-compare-grid {
  margin-top: 20px;
}

.bridge-compare-grid > article {
  display: grid;
  gap: 11px;
}

.bridge-compare-grid > article > span {
  width: fit-content;
  padding: 5px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
}

.bridge-compare-grid .is-wrong {
  border-color: rgba(198, 90, 77, 0.35);
  background: #fff5f1;
}

.bridge-compare-grid .is-wrong > span {
  background: var(--coral-light);
  color: #8c3e34;
}

.bridge-compare-grid .is-correct {
  border-color: rgba(53, 104, 89, 0.3);
  background: #f4faf6;
}

.bridge-compare-grid .is-correct > span {
  background: var(--green-light);
  color: var(--green);
}

.bridge-compare-grid p {
  color: var(--ink-soft);
  line-height: 1.65;
}

.bridge-question-context {
  display: grid;
  margin: 14px 0 0;
  padding: 13px 15px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px 18px;
  border: 1px solid rgba(53, 104, 89, 0.22);
  border-radius: 14px;
  background: var(--green-light);
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.55;
}

.bridge-question-context span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.bridge-question-context strong {
  margin-right: 8px;
  color: var(--green);
}

.bridge-table[data-defenders-revealed="true"] .finesse-table__middle {
  grid-template-columns: minmax(142px, 0.92fr) minmax(230px, 1.5fr) minmax(142px, 0.92fr);
}

.finesse-defender.is-revealed {
  min-height: 126px;
  padding: 10px 7px;
  gap: 8px;
}

.finesse-defender .finesse-defender__cards {
  display: flex;
  width: 100%;
  align-items: flex-start;
  justify-content: center;
  gap: 4px;
  flex-wrap: wrap;
  color: inherit;
}

.finesse-defender .bridge-defender-card {
  display: inline-flex;
  width: 31px;
  height: 43px;
  padding: 4px 3px;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: flex-start;
  border: 1px solid rgba(27, 42, 37, 0.22);
  border-radius: 6px;
  background: #fffdf8;
  box-shadow: 0 2px 5px rgba(18, 35, 30, 0.16);
  color: #1e2925;
  font-size: 12px;
  font-weight: 900;
  line-height: 1;
}

.finesse-defender .bridge-defender-card.is-red { color: #b43242; }

.finesse-defender .bridge-defender-card small {
  color: inherit;
  font-size: 10px;
  font-weight: 900;
}

.bridge-timeline {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.bridge-timeline article {
  position: relative;
  display: grid;
  min-width: 0;
  padding: 17px;
  align-content: start;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--paper);
}

.bridge-timeline article:not(:last-child)::after {
  position: absolute;
  top: 31px;
  right: -12px;
  z-index: 2;
  color: var(--green);
  content: "→";
  font-size: 20px;
  font-weight: 900;
}

.bridge-timeline b {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
}

.bridge-timeline strong { font-size: 17px; }
.bridge-timeline span { color: var(--ink-soft); line-height: 1.55; }

.bridge-table .finesse-hand.is-established {
  border-color: #f5ca4f;
  box-shadow: 0 0 0 3px rgba(245, 202, 79, 0.34);
  background: #fff8d9;
  opacity: 1;
}

.bridge-card > span { line-height: 1; }

@media (max-width: 820px) {
  .bridge-example-grid,
  .bridge-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bridge-timeline article:nth-child(2)::after { content: none; }
}

@media (max-width: 640px) {
  .bridge-example-grid,
  .bridge-compare-grid,
  .bridge-timeline {
    grid-template-columns: 1fr;
  }

  .bridge-example-grid > article,
  .bridge-compare-grid > article,
  .bridge-break-example,
  .bridge-card-example,
  .bridge-teaching-table {
    padding: 14px;
  }

  .bridge-route-lesson {
    padding: 13px;
    grid-template-columns: 1fr;
    gap: 11px;
  }

  .bridge-step-list li { grid-template-columns: 1fr; gap: 2px; }
  .bridge-question-context { grid-template-columns: 1fr; }
  .bridge-table[data-defenders-revealed="true"] .finesse-table__middle {
    grid-template-columns: minmax(68px, 0.62fr) minmax(128px, 1.45fr) minmax(68px, 0.62fr);
  }
  .finesse-defender.is-revealed { min-height: 120px; }
  .finesse-defender .bridge-defender-card { width: 27px; height: 39px; font-size: 11px; }
  .bridge-demo-hand { grid-template-columns: 58px minmax(0, 1fr); padding: 10px; }
  .bridge-demo-hand > strong { font-size: 16px; }
  .bridge-short-order,
  .bridge-route { align-items: stretch; flex-direction: column; }
  .bridge-short-order span,
  .bridge-route span { width: 100%; }
  .bridge-short-order > b,
  .bridge-route > b { transform: rotate(90deg); text-align: center; }
  .bridge-timeline article::after { content: none !important; }
  .play-question-outcome { padding: 10px 11px; }
  .play-question-outcome__header { gap: 8px; }
  .play-question-outcome__summary h4 { font-size: 16px; }
  .play-question-outcome__actions { gap: 6px; }
  .play-question-outcome__actions .quiz-button { padding: 9px 11px; font-size: 13px; }
}