:root {
  color-scheme: dark;
  --felt: #0c6b4c;
  --felt-deep: #07432f;
  --panel: rgba(5, 23, 32, 0.78);
  --panel-border: rgba(255, 255, 255, 0.16);
  --card: #fffaf1;
  --card-shadow: rgba(2, 10, 20, 0.28);
  --ink: #14202d;
  --muted: #cde8dc;
  --accent: #f5c451;
  --red: #d84646;
  --black: #172330;
  --slot: rgba(255, 255, 255, 0.13);
  --slot-border: rgba(255, 255, 255, 0.34);
  --card-w: clamp(48px, 11vw, 86px);
  --card-h: calc(var(--card-w) * 1.38);
  --stack-gap: clamp(19px, 4vw, 32px);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: white;
  background:
    radial-gradient(circle at 18% 12%, rgba(250, 213, 95, 0.26), transparent 25%),
    radial-gradient(circle at 88% 20%, rgba(76, 194, 255, 0.14), transparent 24%),
    linear-gradient(135deg, #072e25, var(--felt) 48%, #052b23);
}

button {
  font: inherit;
}

.game-shell {
  width: min(1180px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(12px, 2vw, 24px);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 14px;
}

.topbar,
.help-card {
  border: 1px solid var(--panel-border);
  background: var(--panel);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(12px);
}

.topbar {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto auto;
  align-items: center;
  gap: 14px;
  padding: 14px;
  border-radius: 24px;
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.25rem, 4vw, 2.2rem);
  line-height: 1;
}

.stats,
.actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.stats span {
  min-width: 74px;
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
}

.stats strong {
  color: white;
}

.actions button {
  border: 0;
  border-radius: 999px;
  padding: 9px 14px;
  color: #132016;
  background: var(--accent);
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.18);
}

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

.board {
  overflow-x: auto;
  padding: clamp(8px, 1.5vw, 18px);
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    radial-gradient(circle at center, rgba(255, 255, 255, 0.09), transparent 70%);
  background-size: 44px 44px, 44px 44px, 100% 100%;
}

.upper-row,
.tableau {
  min-width: calc(var(--card-w) * 7 + 48px);
  display: grid;
  grid-template-columns: repeat(7, var(--card-w));
  gap: clamp(8px, 1.7vw, 18px);
}

.upper-row {
  align-items: start;
  margin-bottom: 22px;
}

.spacer {
  grid-column: span 1;
}

.tableau {
  align-items: start;
}

.pile {
  position: relative;
  min-width: var(--card-w);
  min-height: var(--card-h);
  border: 2px dashed var(--slot-border);
  border-radius: clamp(8px, 1.5vw, 14px);
  background: var(--slot);
  cursor: pointer;
  color: inherit;
}

.pile::before {
  content: attr(data-label);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.46);
  font-size: clamp(1.4rem, 4vw, 2.25rem);
  font-weight: 900;
}

.tableau-pile {
  border: 0;
  background: transparent;
  min-height: calc(var(--card-h) + 260px);
}

.card {
  position: relative;
  width: var(--card-w);
  height: var(--card-h);
  padding: clamp(5px, 1vw, 9px);
  border: 0;
  border-radius: clamp(8px, 1.5vw, 14px);
  background: var(--card);
  color: var(--ink);
  box-shadow: 0 9px 18px var(--card-shadow);
  display: grid;
  grid-template-rows: auto 1fr auto;
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    outline-color 160ms ease;
}

.tableau-pile .card {
  position: absolute;
  left: 0;
  top: calc(var(--index) * var(--stack-gap));
}

.card.red {
  color: var(--red);
}

.card.black {
  color: var(--black);
}

.card.face-down {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.22), transparent 42%),
    repeating-linear-gradient(45deg, #274ef4 0 8px, #1d37b9 8px 16px);
  color: transparent;
}

.card.face-down::after {
  content: "E";
  position: absolute;
  inset: 14%;
  display: grid;
  place-items: center;
  border: 2px solid rgba(255, 255, 255, 0.42);
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.82);
  font-size: calc(var(--card-w) * 0.44);
  font-weight: 950;
}

.card.selected {
  transform: translateY(-6px);
  outline: 4px solid var(--accent);
  box-shadow: 0 14px 24px rgba(0, 0, 0, 0.28);
  z-index: 20;
}

.rank {
  font-weight: 950;
  font-size: clamp(0.9rem, 2.6vw, 1.4rem);
  line-height: 1;
}

.suit {
  align-self: center;
  justify-self: center;
  font-size: clamp(1.5rem, 5vw, 2.9rem);
  line-height: 1;
}

.corner {
  justify-self: end;
  align-self: end;
  transform: rotate(180deg);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  padding: 12px 16px;
  border-radius: 999px;
  background: rgba(7, 20, 28, 0.92);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
  font-weight: 800;
  z-index: 100;
}

.help-card {
  border-radius: 18px;
  padding: 12px 14px;
  color: var(--muted);
  font-size: 0.9rem;
}

.help-card strong {
  color: white;
}

@media (max-width: 760px) {
  :root {
    --card-w: clamp(43px, 12vw, 58px);
    --stack-gap: 22px;
  }

  .game-shell {
    padding: 10px;
  }

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

  .stats,
  .actions {
    justify-content: flex-start;
  }

  .stats span {
    min-width: auto;
  }
}