:root {
  color-scheme: light;
  --bg-dark: #d9f4e9;
  --bg-mid: #fff1c7;
  --ambient: rgba(255, 255, 255, 0.85);
  --app-surface: rgba(255, 255, 255, 0.88);
  --panel: rgba(255, 255, 255, 0.84);
  --panel-soft: #e5f5e9;
  --table: #c8ebd8;
  --border: rgba(35, 102, 76, 0.22);
  --text: #173d32;
  --muted: #55766a;
  --gold: #b87312;
  --shadow: rgba(31, 83, 62, 0.18);
  --card-back-gr1: #147866;
  --card-back-gr2: #2ba889;
  --card-neg2: #123b30;
  --card-neg1: #1c5c46;
  --card-zero: #2a5d63;
  --card-low: #24518a;
  --card-mid: #d69a21;
  --card-high: #b52b2b;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg-dark: #071b18;
  --bg-mid: #0f2d2b;
  --ambient: rgba(63, 110, 92, 0.4);
  --app-surface: rgba(9, 27, 25, 0.92);
  --panel: rgba(18, 45, 41, 0.92);
  --panel-soft: rgba(21, 48, 44, 0.9);
  --table: #174a3d;
  --border: rgba(180, 240, 205, 0.3);
  --text: #eefcf5;
  --muted: #b7d9cf;
  --gold: #f7d98f;
  --shadow: rgba(0, 0, 0, 0.35);
  --card-back-gr1: #0f2f33;
  --card-back-gr2: #1a4f57;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top, var(--ambient), transparent 35%),
    linear-gradient(180deg, var(--bg-dark), var(--bg-mid));
  color: var(--text);
  transition: background-color 0.25s ease, color 0.25s ease;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

button {
  font: inherit;
}

#app {
  width: min(1880px, 100%);
}

.menu-shell {
  width: min(900px, 100%);
  min-height: calc(100vh - 40px);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.game-shell {
  position: relative;
  min-height: calc(100vh - 40px);
  display: flex;
  flex-direction: column;
  background: var(--app-surface);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: 0 28px 60px var(--shadow);
  padding: 22px;
}

.theme-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 14px;
}

.theme-toggle {
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  font-weight: 750;
  cursor: pointer;
  transition: transform 0.18s ease, background-color 0.2s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
}

.theme-toggle:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.scoreboard {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  margin-bottom: 20px;
}

.scoreboard__player {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px 18px;
  text-align: center;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.scoreboard__player.is-active {
  border-color: var(--gold);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--gold) 32%, transparent);
}

.scoreboard__player h3 {
  margin: 0 0 8px;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
}

.scoreboard__player p {
  margin: 6px 0;
  color: var(--muted);
}

.scoreboard__vs {
  font-weight: 800;
  letter-spacing: 0.12em;
  font-size: clamp(1rem, 1.4vw, 1.6rem);
  color: var(--gold);
}

.table-area {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
  flex: 1 0 auto;
}

.table-area--two-players {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.player-panel {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.player-panel h3 {
  margin: 0 0 14px;
  text-align: center;
  letter-spacing: 0.04em;
  font-size: clamp(1rem, 1.5vw, 1.2rem);
}

.board-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(48px, 1fr));
  gap: 12px;
}

.card {
  position: relative;
  width: 100%;
  aspect-ratio: 0.8;
  border: none;
  border-radius: 16px;
  padding: 0;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 10px 16px rgba(0, 0, 0, 0.18);
  overflow: hidden;
}

.card-slot-empty {
  width: 100%;
  aspect-ratio: 0.8;
}

.card:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 16px 22px rgba(0, 0, 0, 0.22);
}

.card--hidden {
  background: linear-gradient(180deg, var(--card-back-gr1), var(--card-back-gr2));
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.card--visible {
  color: white;
  font-weight: 900;
}

.card--neg2 { background: var(--card-neg2); }
.card--neg1 { background: var(--card-neg1); }
.card--zero { background: var(--card-zero); }
.card--low { background: var(--card-low); }
.card--mid { background: var(--card-mid); color: #1d1a0c; }
.card--high { background: var(--card-high); }

.card__back,
.card__face {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
}

.card__back {
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(0,0,0,0.12));
  color: #f6f0b7;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card__face {
  font-size: clamp(1.2rem, 2vw, 2rem);
}

.table-center {
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: center;
  justify-content: center;
}

.pile-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.stack-label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.deck-card,
.discard-card {
  width: 110px;
  height: 150px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.5rem;
  box-shadow: 0 12px 18px rgba(0,0,0,0.22);
  cursor: pointer;
  transition: transform 0.18s ease, filter 0.18s ease;
}

.deck-card {
  border: 1px solid rgba(255,255,255,0.15);
  background: linear-gradient(180deg, var(--card-back-gr2), var(--card-back-gr1));
  color: #f8f4bf;
}

.discard-card {
  background: linear-gradient(180deg, #6c3622, #9f5a31);
  color: #fff6db;
}

.deck-card:disabled,
.discard-card:disabled {
  cursor: default;
  filter: saturate(0.65);
}

.deck-card:not(:disabled):hover,
.discard-card:not(:disabled):hover {
  transform: translateY(-3px);
  filter: brightness(1.08);
}

.discard-card--empty {
  font-size: 0.9rem;
  background: rgba(255,255,255,0.08);
  color: var(--muted);
}

.drawn-card {
  width: 110px;
  height: 150px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  border: 2px solid rgba(255, 255, 255, 0.7);
  border-radius: 18px;
  padding: 14px 8px;
  box-shadow: 0 12px 18px rgba(0, 0, 0, 0.22);
  animation: card-draw 0.32s ease-out both;
}

.drawn-card.card--neg2 { background: var(--card-neg2); color: #fff; }
.drawn-card.card--neg1 { background: var(--card-neg1); color: #fff; }
.drawn-card.card--zero { background: var(--card-zero); color: #fff; }
.drawn-card.card--low { background: var(--card-low); color: #fff; }
.drawn-card.card--mid { background: var(--card-mid); color: #1d1a0c; }
.drawn-card.card--high { background: var(--card-high); color: #fff; }

.drawn-card__label {
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
}

.drawn-card__value {
  font-size: 2.5rem;
  line-height: 1;
}

@keyframes card-draw {
  from { opacity: 0; transform: translateY(-10px) scale(0.92); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.turn-actions,
.menu-panel,
.round-banner,
.transition-screen,
.result-panel,
.game-over {
  margin-top: 22px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 18px 20px;
  text-align: center;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.turn-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px;
}

.draw-choices {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.primary,
.secondary {
  min-width: 170px;
  min-height: 48px;
  border-radius: 999px;
  border: none;
  padding: 12px 18px;
  font-weight: 800;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: transform 0.18s ease, filter 0.18s ease;
}

.primary {
  background: linear-gradient(180deg, #f7d98f, #ecb64b);
  color: #1d1607;
}

.secondary {
  background: linear-gradient(180deg, #dfe8dd, #b9d0c0);
  color: #183129;
}

.primary:hover,
.secondary:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.menu-panel h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.menu-panel p {
  margin: 8px 0;
  color: var(--muted);
}

.cta-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.round-banner h2,
.result-panel h2,
.game-over h2,
.transition-screen h2 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 2vw, 2.2rem);
}

.round-banner p,
.result-panel p,
.transition-screen p,
.game-over p {
  margin: 8px 0;
  color: var(--muted);
}

.toast {
  margin-top: 14px;
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--text);
  text-align: center;
}

@media (max-width: 980px) {
  .table-area {
    grid-template-columns: 1fr;
  }

  .table-area--two-players {
    grid-template-columns: 1fr;
  }

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

  .scoreboard__vs {
    display: none;
  }

  .game-shell,
  .menu-shell {
    min-height: calc(100vh - 40px);
  }
}

@media (max-width: 640px) {
  body {
    padding: 12px;
  }

  .game-shell {
    padding: 14px;
    min-height: calc(100vh - 24px);
  }

  .menu-shell {
    min-height: calc(100vh - 24px);
  }

  .theme-toolbar {
    margin-bottom: 10px;
  }

  .board-grid {
    gap: 8px;
  }

  .primary,
  .secondary {
    min-width: 140px;
    width: 100%;
  }
}