:root {
  color-scheme: light;
  --bg: #faf6ee;
  --bg-dark: #f0e8d8;
  --panel: #ffffff;
  --ink: #3a3a3a;
  --charcoal: #2c2c2c;
  --muted: #6b6b6b;
  --felt: #2d6a4f;
  --felt-deep: #1a3c34;
  --felt-dark: #15332c;
  --accent: #c9a84c;
  --accent-light: #e0c872;
  --accent-dark: #9a7a2e;
  --line: #f0e8d8;
  --good: #40916c;
  --bad: #b5342e;
  --card: #fffdf8;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --font-heading: Georgia, "Times New Roman", serif;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-base);
  background:
    url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%22100%22 height=%22100%22%3E %3Ctext x=%2250%22 y=%2257%22 font-size=%2213%22 text-anchor=%22middle%22 fill=%22rgba(26,60,52,0.045)%22%3E%E2%99%A3%3C/text%3E%3C/svg%3E"),
    linear-gradient(180deg, rgba(240, 232, 216, 0.78), transparent 360px),
    var(--bg);
  background-size: 100px 100px, auto, auto;
}

button {
  font: inherit;
}

.club-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 72px;
  padding: 12px max(18px, calc((100vw - 1180px) / 2));
  color: rgba(255, 255, 255, 0.82);
  background: rgba(26, 60, 52, 0.95);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.24);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(201, 168, 76, 0.45);
  border-radius: 8px;
  color: var(--accent);
  font-size: 1.6rem;
  background: rgba(255, 255, 255, 0.06);
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong {
  color: var(--accent);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
}

.brand-copy span {
  font-size: 0.86rem;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(420px, 1fr) minmax(380px, 520px);
  gap: 24px;
  width: min(1180px, calc(100vw - 32px));
  min-height: calc(100vh - 104px);
  margin: 16px auto;
  align-items: stretch;
}

.table-zone,
.lesson-panel {
  min-height: 620px;
}

.table-zone {
  display: grid;
  justify-items: center;
  align-items: start;
  padding-top: 48px;
}

.table {
  position: relative;
  width: min(100%, 680px);
  aspect-ratio: 1 / 1;
  border-radius: 16px;
  background:
    url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%22100%22 height=%22100%22%3E%3Cpolygon points=%2250,0 100,50 50,100 0,50%22 fill=%22none%22 stroke=%22rgba(255,255,255,0.08)%22 stroke-width=%220.7%22/%3E%3Ctext x=%2250%22 y=%2258%22 font-size=%2217%22 text-anchor=%22middle%22 fill=%22rgba(255,255,255,0.1)%22%3E%E2%99%A0%3C/text%3E%3C/svg%3E"),
    radial-gradient(ellipse at 20% 50%, rgba(201, 168, 76, 0.08), transparent 60%),
    linear-gradient(165deg, var(--felt-deep) 0%, var(--felt-dark) 46%, #1e4a3f 100%);
  background-size: 100px 100px, auto, auto;
  border: 1px solid rgba(201, 168, 76, 0.4);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.table::before {
  content: "";
  position: absolute;
  inset: 54px;
  border: 1px solid rgba(201, 168, 76, 0.24);
  border-radius: 12px;
}

.seat {
  position: absolute;
  display: grid;
  place-items: center;
  width: 118px;
  min-height: 66px;
  padding: 10px;
  border: 1px solid rgba(201, 168, 76, 0.32);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-md);
  z-index: 2;
}

.seat-name {
  color: var(--felt-deep);
  font-family: var(--font-heading);
  font-weight: 800;
}

.seat-team {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.seat-north {
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
}

.seat-east {
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
}

.seat-south {
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
}

.seat-west {
  left: 22px;
  top: 50%;
  transform: translateY(-50%);
}

.trick-area {
  position: absolute;
  inset: 112px;
  z-index: 1;
  pointer-events: none;
}

.hand-peek-layer {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

.table-hover-hint {
  position: absolute;
  left: 50%;
  top: 50%;
  max-width: 260px;
  padding: 10px 14px;
  border: 1px solid rgba(201, 168, 76, 0.35);
  border-radius: 999px;
  color: var(--accent-light);
  background: rgba(26, 60, 52, 0.8);
  font-size: 0.86rem;
  font-weight: 850;
  text-align: center;
  transform: translate(-50%, -50%);
}

.hand-peek {
  position: absolute;
  display: grid;
  gap: 2px;
  min-width: 150px;
  padding: 8px 10px;
  border: 1px solid rgba(201, 168, 76, 0.45);
  border-radius: 6px;
  color: #f8f5e9;
  background: rgba(9, 18, 16, 0.84);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: auto;
  transition: opacity 140ms ease, visibility 140ms ease;
}

.hand-suit-row {
  display: grid;
  grid-template-columns: 18px 1fr;
  align-items: baseline;
  min-height: 20px;
  font-size: 0.94rem;
  font-weight: 850;
  line-height: 1.2;
  white-space: nowrap;
}

.hand-suit-row.red {
  color: #ff9a8e;
}

.hand-suit-row.black {
  color: #dff4ec;
}

.hand-suit {
  font-size: 1rem;
}

.hand-ranks {
  letter-spacing: 0.02em;
}

.hand-rank.played {
  color: rgba(210, 210, 210, 0.52);
  text-decoration: line-through;
  text-decoration-thickness: 2px;
}

.hand-peek-n {
  top: 116px;
  left: 50%;
  transform: translateX(-50%);
}

.hand-peek-s {
  bottom: 116px;
  left: 50%;
  transform: translateX(-50%);
}

.hand-peek-e {
  top: 50%;
  right: 148px;
  transform: translateY(-50%);
}

.hand-peek-w {
  top: 50%;
  left: 148px;
  transform: translateY(-50%);
}

.seat-north:hover ~ .hand-peek-layer .hand-peek-n,
.seat-east:hover ~ .hand-peek-layer .hand-peek-e,
.seat-south:hover ~ .hand-peek-layer .hand-peek-s,
.seat-west:hover ~ .hand-peek-layer .hand-peek-w,
.hand-peek:hover,
.hand-peek:focus-within {
  opacity: 1;
  visibility: visible;
}

.hand-peek.visible {
  opacity: 1;
  visibility: visible;
}

.card-back-grid {
  display: grid;
  grid-template-columns: repeat(7, 14px);
  gap: 5px;
}

.card-back {
  display: block;
  width: 14px;
  aspect-ratio: 0.72 / 1;
  border: 1px solid rgba(201, 168, 76, 0.62);
  border-radius: 3px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.16), transparent 44%),
    repeating-linear-gradient(
      45deg,
      rgba(201, 168, 76, 0.3) 0 2px,
      rgba(26, 60, 52, 0.5) 2px 5px
    ),
    var(--felt-deep);
}

.contract-pill {
  position: absolute;
  left: 50%;
  bottom: 118px;
  transform: translateX(-50%);
  padding: 8px 14px;
  border: 1px solid rgba(201, 168, 76, 0.35);
  border-radius: 999px;
  color: var(--accent-light);
  background: rgba(201, 168, 76, 0.12);
  font-weight: 800;
  z-index: 3;
}

.lesson-panel {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow-lg);
  overflow: visible;
}

.lesson-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 28px 28px 18px;
  border-bottom: 1px solid var(--line);
}

.lesson-header > div:first-child {
  flex: 1 1 auto;
  min-width: 0;
}

.header-tools {
  display: grid;
  flex: 0 0 184px;
  justify-items: end;
  gap: 14px;
}

.language-toggle {
  display: inline-grid;
  grid-template-columns: repeat(2, 44px);
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.language-button {
  min-height: 32px;
  border: 0;
  border-radius: 6px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 900;
}

.language-button.active {
  color: var(--felt-deep);
  background: var(--accent);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: var(--felt-deep);
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  line-height: 1.15;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.progress-wrap {
  min-width: 104px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 800;
  text-align: right;
}

.progress-slider {
  --progress: 0%;
  display: block;
  width: 160px;
  height: 18px;
  margin-top: 7px;
  appearance: none;
  -webkit-appearance: none;
  cursor: grab;
  background: transparent;
}

.progress-slider:active {
  cursor: grabbing;
}

.progress-slider::-webkit-slider-runnable-track {
  height: 8px;
  border-radius: 999px;
  background:
    linear-gradient(90deg, var(--accent) 0 var(--progress), var(--bg-dark) var(--progress) 100%);
}

.progress-slider::-moz-range-track {
  height: 8px;
  border-radius: 999px;
  background: var(--bg-dark);
}

.progress-slider::-moz-range-progress {
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
}

.progress-slider::-webkit-slider-thumb {
  width: 22px;
  height: 22px;
  margin-top: -7px;
  border: 3px solid #fff;
  border-radius: 999px;
  appearance: none;
  -webkit-appearance: none;
  background: var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.24);
}

.progress-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: 3px solid #fff;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.24);
}

.lesson-body {
  flex: 1;
  padding: 28px;
}

#lessonText {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
  white-space: pre-line;
}

.fact-grid,
.choice-grid,
.hand-row {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

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

.fact-card {
  min-height: 86px;
  padding: 16px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.fact-card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--felt-deep);
  font-family: var(--font-heading);
}

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

.choice-button,
.card-button {
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fff;
  cursor: pointer;
  transition: border-color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.choice-button {
  padding: 14px 16px;
  text-align: left;
  font-weight: 750;
}

.choice-button:hover,
.card-button:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.choice-button.correct,
.card-button.correct {
  border-color: var(--good);
  background: #edf8f2;
}

.choice-button.wrong,
.card-button.wrong {
  border-color: var(--bad);
  background: #fff0ee;
}

.choice-button:disabled,
.card-button:disabled {
  cursor: default;
  transform: none;
}

.display-card {
  cursor: default;
}

.display-card:hover {
  border-color: rgba(44, 44, 44, 0.1);
  box-shadow: var(--shadow-md);
  transform: none;
}

.hand-row {
  display: flex;
  flex-wrap: wrap;
}

.card-button,
.play-card {
  display: grid;
  place-items: center;
  width: 66px;
  aspect-ratio: 0.72 / 1;
  border: 1px solid rgba(44, 44, 44, 0.1);
  border-radius: 7px;
  background: var(--card);
  box-shadow: var(--shadow-md);
  font-size: 1.2rem;
  font-weight: 900;
}

.card-button.red,
.play-card.red {
  color: var(--bad);
}

.card-button.black,
.play-card.black {
  color: #17211d;
}

.suit-red {
  color: var(--bad);
}

.suit-black {
  color: #17211d;
}

.term-tooltip {
  position: relative;
  border-bottom: 1px dashed var(--accent);
  color: var(--felt-deep);
  font-weight: 800;
  cursor: help;
}

.glossary-popover {
  position: fixed;
  padding: 12px 14px;
  border-radius: 8px;
  color: #fff;
  background: var(--felt-deep);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  font-weight: 750;
  line-height: 1.35;
  opacity: 0;
  pointer-events: none;
  transform: translateY(4px);
  transition: opacity 120ms ease, transform 120ms ease;
  z-index: 30;
}

.glossary-popover.visible {
  opacity: 1;
  transform: translateY(0);
}

.play-card {
  position: absolute;
  animation: dealIn 180ms ease-out;
}

.play-card[data-seat="N"] {
  top: 4%;
  left: 50%;
  transform: translateX(-50%);
}

.trick-area.with-visible-hands .play-card[data-seat="N"] {
  top: 22%;
}

.play-card[data-seat="E"] {
  top: 50%;
  right: 4%;
  transform: translateY(-50%);
}

.trick-area.with-visible-hands .play-card[data-seat="E"] {
  right: 22%;
}

.play-card[data-seat="S"] {
  bottom: 4%;
  left: 50%;
  transform: translateX(-50%);
}

.trick-area.with-visible-hands .play-card[data-seat="S"] {
  bottom: 22%;
}

.play-card[data-seat="W"] {
  top: 50%;
  left: 4%;
  transform: translateY(-50%);
}

.trick-area.with-visible-hands .play-card[data-seat="W"] {
  left: 22%;
}

.play-card::after {
  content: attr(data-seat);
  position: absolute;
  bottom: -22px;
  color: #f5f0dd;
  font-size: 0.72rem;
  font-weight: 800;
}

.play-card[data-turn]::before {
  content: attr(data-turn);
  position: absolute;
  top: -8px;
  right: -8px;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  color: var(--felt-deep);
  background: var(--accent);
  font-size: 0.72rem;
  font-weight: 900;
  box-shadow: var(--shadow-sm);
}

.feedback {
  min-height: 52px;
  margin: 18px 0 0;
  color: var(--muted);
  font-weight: 750;
  line-height: 1.45;
}

.feedback.good {
  color: var(--good);
}

.feedback.bad {
  color: var(--bad);
}

.lesson-actions {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 28px 28px;
  border-top: 1px solid var(--line);
}

.primary-button,
.ghost-button {
  min-width: 116px;
  min-height: 46px;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 850;
}

.primary-button {
  color: var(--felt-deep);
  background: var(--accent);
}

.primary-button:hover:not(:disabled) {
  background: var(--accent-light);
  transform: translateY(-1px);
}

.primary-button:disabled {
  color: #8a887f;
  background: #e3e0d6;
  cursor: not-allowed;
}

.ghost-button {
  color: var(--ink);
  background: transparent;
  border-color: var(--line);
}

.ghost-button:hover:not(:disabled) {
  color: var(--felt-deep);
  border-color: var(--felt);
}

.ghost-button:disabled {
  color: #aaa;
  cursor: not-allowed;
}

@keyframes dealIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (max-width: 920px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .table-zone,
  .lesson-panel {
    min-height: auto;
  }

  .table-zone {
    padding-top: 0;
  }

  .table {
    width: min(100%, 560px);
  }
}

@media (max-width: 560px) {
  .club-nav {
    min-height: 64px;
    padding: 10px;
  }

  .app-shell {
    width: min(100vw - 20px, 480px);
    margin: 10px auto;
    gap: 14px;
  }

  .table {
    border-radius: 12px;
  }

  .seat {
    width: 88px;
    min-height: 54px;
    padding: 8px;
  }

  .seat-north {
    top: 12px;
  }

  .seat-east {
    right: 12px;
  }

  .seat-south {
    bottom: 12px;
  }

  .seat-west {
    left: 12px;
  }

  .contract-pill {
    bottom: 86px;
  }

  .lesson-header,
  .lesson-body,
  .lesson-actions {
    padding-left: 18px;
    padding-right: 18px;
  }

  .lesson-header {
    flex-direction: column;
  }

  .header-tools {
    flex: none;
    justify-items: start;
  }

  .progress-wrap {
    text-align: left;
  }

  .progress-slider {
    width: 150px;
  }

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

  .card-button,
  .play-card {
    width: 54px;
  }

  .trick-area {
    inset: 82px;
  }

  .hand-peek {
    min-width: 128px;
    padding: 7px 9px;
  }

  .hand-suit-row {
    grid-template-columns: 16px 1fr;
    font-size: 0.82rem;
  }

  .hand-peek-n {
    top: 78px;
  }

  .hand-peek-s {
    bottom: 78px;
  }

  .hand-peek-e {
    right: 78px;
  }

  .hand-peek-w {
    left: 78px;
  }
}