/* Snake Game — dark-first, design-system tokens */
.snake {
  --snake-bg: var(--bg);
  --snake-grid: rgba(255, 255, 255, 0.07);
  --snake-food: var(--accent);
  --snake-body: var(--text);
  --snake-head: var(--accent);
  --snake-golden: #f5c542;

  display: flex;
  flex-direction: column;
  height: calc(100dvh - var(--mobile-header-h) - 68px);
  max-height: 700px;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

@media (min-width: 1024px) {
  .snake {
    height: calc(100dvh - var(--space-xl) * 2);
    max-width: 700px;
    margin: 0 auto;
  }
}

/* Header: score + pause */
.snake__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.snake__scores {
  display: flex;
  gap: var(--space-lg);
}

.snake__score {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.snake__label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  font-weight: var(--font-semibold);
}

.snake__value {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.snake__pause-btn {
  height: 36px;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.snake__pause-btn:hover {
  background: var(--surface-3);
}

/* Arena: canvas + overlays */
.snake__arena {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.snake__arena canvas {
  display: block;
}

/* Overlays */
.snake__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 28, 30, 0.85);
  backdrop-filter: blur(4px);
  z-index: 2;
  animation: snake-fade-in 200ms ease;
}

.snake__overlay--hidden {
  display: none;
}

.snake__overlay-content {
  text-align: center;
  padding: var(--space-xl);
}

.snake__overlay-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--text);
  margin-bottom: var(--space-sm);
}

.snake__overlay-score {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.snake__overlay-hint {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.snake__overlay-keys {
  display: flex;
  gap: var(--space-xs);
  justify-content: center;
  color: var(--text-faint);
  font-size: var(--text-xs);
}

.snake__overlay-keys kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.snake__overlay-hint--mobile {
  display: none;
}

@media (max-width: 1023px) {
  .snake__overlay-keys--desktop {
    display: none;
  }

  .snake__overlay-hint--mobile {
    display: block;
  }
}

@keyframes snake-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* D-pad — mobile only */
.snake__dpad {
  display: none;
}

@media (max-width: 1023px) {
  .snake__dpad {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding-bottom: var(--space-2xs);
  }
}

.snake__dpad-row {
  display: flex;
  align-items: center;
  gap: 2px;
}

.snake__dpad-center {
  width: 60px;
  height: 60px;
}

.snake__dpad-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.snake__dpad-btn:active {
  background: var(--surface-3);
  color: var(--text);
}

/* Light theme */
[data-theme="light"] .snake {
  --snake-bg: var(--bg);
  --snake-grid: rgba(0, 0, 0, 0.08);
  --snake-food: var(--accent);
  --snake-body: var(--text);
  --snake-head: var(--accent);
  --snake-golden: #e5a800;
}

[data-theme="light"] .snake__overlay {
  background: rgba(248, 249, 250, 0.88);
}

/* Screen shake on death */
@keyframes snake-shake {
  0%, 100% { transform: translate(0, 0); }
  10% { transform: translate(-3px, 2px); }
  20% { transform: translate(3px, -2px); }
  30% { transform: translate(-2px, -3px); }
  40% { transform: translate(2px, 3px); }
  50% { transform: translate(-3px, -1px); }
  60% { transform: translate(3px, 1px); }
  70% { transform: translate(-1px, 3px); }
  80% { transform: translate(1px, -3px); }
}

.snake__arena--shake {
  animation: snake-shake 0.4s ease;
}

/* New record celebration */
.snake__overlay-title--record {
  color: var(--accent) !important;
  animation: snake-record-glow 1.5s ease-in-out infinite;
}

@keyframes snake-record-glow {
  0%, 100% { text-shadow: 0 0 10px var(--accent), 0 0 20px rgba(167, 139, 250, 0.3); }
  50% { text-shadow: 0 0 20px var(--accent), 0 0 40px var(--accent), 0 0 60px rgba(167, 139, 250, 0.2); }
}