/* ============================================================
   game.css: checkers and 3D tic-tac-toe on the stage system.
   Layout and board rules ported from the v2 stylesheet onto the
   home.css tokens. The game engines (checkers.js, tictactoe3d.js)
   only depend on these class names.
   ============================================================ */

.game-stage {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  width: min(100%, 1340px);
  margin-inline: auto;
}

.game-copy {
  display: grid;
  gap: 18px;
}

.game-copy h1 {
  font-size: clamp(3rem, 7vw, 7rem);
}

.game-lede {
  max-width: 50ch;
  color: var(--bone-2);
  font-size: 1.02rem;
}

.game-actions,
.game-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid var(--line-2);
  background: rgba(5, 7, 10, 0.5);
  color: var(--bone);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: border-color 200ms ease, background-color 200ms ease, color 200ms ease;
}

.btn:hover {
  border-color: var(--tint);
}

.btn.solid {
  background: var(--tint);
  border-color: var(--tint);
  color: var(--ink);
}

.game-console {
  display: grid;
  gap: 18px;
  border: 1px solid var(--line-2);
  padding: clamp(16px, 2.6vw, 28px);
  background: rgba(5, 7, 10, 0.62);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.game-status-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.status-pill {
  display: grid;
  gap: 5px;
  min-width: 0;
  border: 1px solid var(--line);
  padding: 11px 12px;
  background: rgba(255, 255, 255, 0.03);
}

.status-pill span {
  font-family: var(--font-mono);
  color: var(--bone-3);
  font-size: 0.64rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-pill strong {
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  line-height: 1;
  text-transform: uppercase;
  color: var(--tint);
}

.game-message {
  margin: 0;
  border-left: 2px solid var(--tint);
  padding: 8px 0 8px 14px;
  color: var(--bone-2);
  font-size: 0.92rem;
  line-height: 1.55;
}

.game-button[disabled],
.ttt-cell[disabled] {
  cursor: not-allowed;
  opacity: 0.55;
}

.checkers-board-wrap {
  display: grid;
  place-items: center;
}

.checkers-board {
  display: grid;
  width: min(100%, 620px);
  aspect-ratio: 1;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--line-2);
  background: var(--ink);
}

.checker-square {
  position: relative;
  display: grid;
  min-width: 0;
  aspect-ratio: 1;
  place-items: center;
  border: 0;
  padding: 0;
  cursor: pointer;
}

.checker-square.light {
  background: rgba(255, 255, 255, 0.07);
}

.checker-square.dark {
  background: rgba(255, 255, 255, 0.02);
}

.checker-square.is-last {
  box-shadow: inset 0 0 0 3px rgba(var(--tint-rgb), 0.45);
}

.checker-square.is-selected {
  box-shadow: inset 0 0 0 3px var(--tint);
}

.checker-square.is-legal::after {
  position: absolute;
  width: 26%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--tint);
  opacity: 0.85;
  content: "";
}

.checker-square.is-capture::after {
  width: 56%;
  border: 2px solid var(--tint);
  background: rgba(var(--tint-rgb), 0.12);
  opacity: 1;
}

.checker-piece {
  position: relative;
  z-index: 1;
  display: grid;
  width: 72%;
  aspect-ratio: 1;
  place-items: center;
  border: 2px solid rgba(0, 0, 0, 0.5);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: clamp(0.7rem, 1.8vw, 0.95rem);
  font-weight: 700;
  line-height: 1;
  box-shadow: inset 0 -6px 0 rgba(0, 0, 0, 0.25);
  animation: piece-pop 180ms var(--ease);
}

.checker-piece.red {
  background: #d9553b;
  color: #16130c;
}

.checker-piece.blue {
  background: #6b93c4;
  color: #16130c;
}

.checker-piece.king {
  border-color: var(--tint);
  box-shadow:
    inset 0 -6px 0 rgba(0, 0, 0, 0.25),
    0 0 0 4px rgba(var(--tint-rgb), 0.3);
}

@keyframes piece-pop {
  from {
    transform: scale(0.6);
  }
}

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

.ttt-layer-card {
  display: grid;
  gap: 12px;
  min-width: 0;
  border: 1px solid var(--line);
  padding: 14px;
  background: rgba(255, 255, 255, 0.03);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.ttt-layer-card:nth-child(1) {
  transform: translateY(14px);
}

.ttt-layer-card:nth-child(3) {
  transform: translateY(-14px);
}

.ttt-layer-card:hover {
  border-color: var(--tint);
}

.ttt-layer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.ttt-layer-header h2 {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--bone-2);
}

.ttt-layer-header span {
  border: 1px solid var(--line-2);
  padding: 3px 7px;
  font-family: var(--font-mono);
  color: var(--tint);
  font-size: 0.66rem;
}

.ttt-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.ttt-cell {
  display: grid;
  min-width: 0;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--line-2);
  background: rgba(5, 7, 10, 0.6);
  color: var(--bone);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1;
  transition: border-color 140ms var(--ease), background 140ms var(--ease);
}

.ttt-cell:hover:not([disabled]) {
  border-color: var(--tint);
  background: rgba(255, 255, 255, 0.05);
}

.ttt-cell.is-x {
  color: var(--tint);
}

.ttt-cell.is-o {
  color: var(--bone);
}

.ttt-cell.is-last {
  border-color: var(--tint);
}

.ttt-cell.is-winning {
  background: var(--tint);
  border-color: var(--tint);
  color: var(--ink);
}

@media (max-width: 980px) {
  .game-stage {
    grid-template-columns: 1fr;
    align-content: start;
    gap: 30px;
  }
}

@media (max-width: 560px) {
  .ttt-layers {
    grid-template-columns: 1fr;
  }
  .ttt-layer-card:nth-child(1),
  .ttt-layer-card:nth-child(3) {
    transform: none;
  }
}