.snake-shell-page::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 14% 12%, rgba(255, 190, 92, 0.24), transparent 24%),
    radial-gradient(circle at 84% 18%, rgba(116, 221, 163, 0.22), transparent 28%),
    radial-gradient(circle at 52% 84%, rgba(102, 179, 255, 0.18), transparent 30%),
    linear-gradient(180deg, rgba(243, 233, 215, 0.88) 0%, rgba(219, 240, 233, 0.92) 100%);
}

.snake-page-content {
  display: grid;
  gap: 14px;
}

.snake-head {
  padding-bottom: 8px;
}

.snake-stage-card {
  padding: 12px;
  border-radius: 32px;
  background:
    linear-gradient(180deg, rgba(255, 252, 247, 0.84), rgba(247, 244, 237, 0.76)),
    rgba(255, 250, 244, 0.76);
}

.snake-brief-row,
.snake-status-grid {
  display: grid;
  gap: 10px;
}

.snake-brief-row {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.snake-status-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 12px;
}

.snake-brief-card {
  min-height: 74px;
  padding: 12px 14px;
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 246, 240, 0.9));
  border: 1px solid rgba(58, 42, 27, 0.08);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.82),
    0 14px 24px rgba(31, 25, 21, 0.06);
}

.snake-brief-label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.78rem;
  color: var(--moyu-muted);
}

.snake-brief-card strong {
  display: block;
  font-size: 1.05rem;
  line-height: 1.2;
}

.snake-canvas-wrap {
  position: relative;
  width: 100%;
  overflow: hidden;
  margin-top: 12px;
  border-radius: 28px;
  background:
    radial-gradient(circle at 50% 12%, rgba(144, 255, 193, 0.12), transparent 28%),
    linear-gradient(180deg, rgba(25, 57, 49, 0.98), rgba(10, 24, 23, 0.98));
  box-shadow:
    0 22px 48px rgba(14, 22, 40, 0.34),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.snake-phaser-stage {
  width: 100%;
  min-height: min(74vh, 760px);
  aspect-ratio: 9 / 16;
  touch-action: none;
}

.snake-phaser-stage canvas {
  display: block;
  width: 100%;
  height: auto;
}

.snake-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(7, 14, 15, 0.34);
  backdrop-filter: blur(4px);
  z-index: 5;
}

.snake-overlay.hidden {
  display: none;
}

.stage-toast {
  position: absolute;
  left: 50%;
  top: 18px;
  transform: translateX(-50%) translateY(-10px);
  min-width: 180px;
  max-width: calc(100% - 28px);
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 249, 241, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #355848;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  box-shadow:
    0 14px 30px rgba(8, 14, 28, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  z-index: 6;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.stage-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.stage-toast.hidden {
  display: none;
}

.stage-toast[data-tone="boss"] {
  background: rgba(255, 237, 232, 0.94);
  color: #934034;
}

.stage-toast[data-tone="debug"] {
  background: rgba(227, 244, 237, 0.94);
  color: #1f6d52;
}

.snake-overlay-card {
  width: 100%;
  max-width: 348px;
  padding: 24px 20px;
  border-radius: 28px;
  text-align: center;
  background: linear-gradient(180deg, rgba(255, 251, 245, 0.98), rgba(244, 241, 233, 0.96));
  box-shadow:
    0 24px 42px rgba(14, 22, 40, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.snake-overlay-tag {
  margin: 0 0 8px;
  color: #267c58;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.snake-overlay-card h2 {
  margin: 0 0 10px;
  font-size: 1.8rem;
}

.snake-overlay-card p {
  margin: 0 0 16px;
  color: var(--moyu-muted);
  line-height: 1.6;
}

.snake-overlay-note {
  margin-top: -4px;
  font-size: 0.84rem;
  color: #5f7d70;
}

.snake-overlay-actions {
  display: grid;
  gap: 8px;
}

#snakeActionButton {
  width: 100%;
  min-height: 48px;
  border: 0;
  border-radius: 18px;
  color: #fff9f4;
  background: linear-gradient(135deg, #2f9d69, #176c59);
  box-shadow: 0 16px 30px rgba(23, 108, 89, 0.24);
  font: inherit;
  font-weight: 700;
}

#snakeSecondaryButton {
  width: 100%;
  border-radius: 18px;
  border-width: 1px;
}

.snake-controls-card {
  margin-top: 12px;
  padding: 10px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(58, 42, 27, 0.08);
}

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

#snakeAudioButton[data-enabled="false"] {
  background: linear-gradient(135deg, rgba(95, 115, 143, 0.18), rgba(52, 70, 93, 0.18));
  color: #40506a;
}

.snake-dpad {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
  align-items: center;
}

.snake-pad-button.up {
  grid-column: 2;
}

.snake-pad-button.left {
  grid-column: 1;
  grid-row: 2;
}

.snake-pad-button.right {
  grid-column: 3;
  grid-row: 2;
}

.snake-pad-button.down {
  grid-column: 2;
  grid-row: 3;
}

.snake-pad-core {
  grid-column: 2;
  grid-row: 2;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(47, 157, 105, 0.14), rgba(121, 183, 255, 0.14));
  color: #176c59;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.snake-pad-button {
  min-height: 52px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 10px 18px rgba(32, 24, 18, 0.08);
}

.snake-insight-grid {
  display: grid;
  gap: 14px;
}

.snake-info-card .card-content {
  position: relative;
}

.snake-info-card .card-content::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(120, 212, 189, 0.18), transparent 30%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 65%);
  pointer-events: none;
}

.snake-info-card h2 {
  position: relative;
  z-index: 1;
  margin: 0 0 10px;
  font-size: 1.38rem;
}

.snake-info-card p,
.compact-list {
  position: relative;
  z-index: 1;
}

.accent-card .card-content::before {
  background:
    radial-gradient(circle at top right, rgba(121, 183, 255, 0.18), transparent 30%),
    radial-gradient(circle at bottom left, rgba(255, 190, 92, 0.16), transparent 30%);
}

.leaderboard-card .card-content {
  background:
    radial-gradient(circle at top right, rgba(120, 212, 189, 0.12), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0));
}

@media (min-width: 768px) {
  .snake-insight-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .snake-brief-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .snake-phaser-stage {
    min-height: 540px;
  }

  .stage-toast {
    top: 14px;
    min-width: 156px;
    font-size: 0.84rem;
  }
}

@media (max-width: 430px) {
  .snake-page-content {
    gap: 12px;
  }

  .snake-stage-card {
    padding: 10px;
    border-radius: 26px;
  }

  .snake-brief-row,
  .snake-status-grid {
    gap: 8px;
  }

  .snake-brief-card {
    min-height: 62px;
    padding: 10px 11px;
    border-radius: 16px;
  }

  .snake-canvas-wrap {
    margin-top: 10px;
    border-radius: 22px;
  }

  .snake-phaser-stage {
    min-height: min(62vh, 620px);
  }

  .snake-controls-card {
    margin-top: 10px;
    padding: 8px;
    border-radius: 20px;
  }

  .snake-aux-controls,
  .snake-dpad {
    gap: 8px;
  }
}