/* Data Snake — self-contained neon game panel, always dark regardless of site theme */
.ds-wrap {
  --ds-bg: #05080d;
  --ds-neon: #00ff9c;
  --ds-cyan: #22d3ee;
  --ds-red: #ff3b5c;
  --ds-text: #cbeee0;
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px;
  background: var(--ds-bg);
  border: 1px solid #12303f;
  border-radius: 16px;
  box-shadow: 0 0 40px rgba(0,255,156,0.08);
  font-family: "Courier New", ui-monospace, monospace;
  color: var(--ds-text);
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.ds-wrap * { box-sizing: border-box; }
.ds-hud {
  width: 100%;
  max-width: 480px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.ds-hud .ds-val { color: var(--ds-neon); text-shadow: 0 0 6px var(--ds-neon); }
.ds-stage {
  position: relative;
  width: min(92vw, 480px);
  aspect-ratio: 1 / 1;
}
.ds-stage canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: var(--ds-bg);
  border: 1px solid #12303f;
  border-radius: 8px;
  box-shadow: 0 0 30px rgba(0,255,156,0.1), inset 0 0 40px rgba(0,0,0,0.6);
  touch-action: none;
}
.ds-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: center;
  background: rgba(5,8,13,0.85);
  backdrop-filter: blur(2px);
  border-radius: 8px;
  padding: 20px;
}
.ds-overlay.ds-hidden { display: none; }
.ds-overlay h1 {
  font-size: clamp(26px, 7vw, 40px);
  color: var(--ds-neon);
  text-shadow: 0 0 12px var(--ds-neon);
  letter-spacing: 2px;
  margin: 0;
}
.ds-overlay p { font-size: 14px; max-width: 320px; line-height: 1.5; color: #9fd8c4; margin: 0; }
.ds-overlay .ds-big { color: var(--ds-cyan); font-size: 18px; text-shadow: 0 0 8px var(--ds-cyan); }
.ds-overlay .ds-legend { font-size: 12px; text-align: left; line-height: 1.7; color: #8fb9ad; }
.ds-btn {
  font-family: inherit;
  font-size: 15px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ds-bg);
  background: var(--ds-neon);
  border: none;
  border-radius: 4px;
  padding: 12px 26px;
  cursor: pointer;
  box-shadow: 0 0 16px rgba(0,255,156,0.5);
  transition: transform 0.08s ease;
}
.ds-btn:active { transform: scale(0.96); }
.ds-hint { font-size: 11px; color: #4f7768; text-align: center; }
.ds-dpad {
  display: none;
  grid-template-columns: repeat(3, 56px);
  grid-template-rows: repeat(3, 56px);
  gap: 6px;
  margin-top: 4px;
}
.ds-dpad button {
  background: rgba(34,211,238,0.12);
  color: var(--ds-cyan);
  border: 1px solid #1c4a5a;
  padding: 0;
  font-size: 22px;
  border-radius: 8px;
  cursor: pointer;
}
.ds-dpad button:active { background: rgba(34,211,238,0.3); }
.ds-dpad .ds-up    { grid-column: 2; grid-row: 1; }
.ds-dpad .ds-left  { grid-column: 1; grid-row: 2; }
.ds-dpad .ds-right { grid-column: 3; grid-row: 2; }
.ds-dpad .ds-down  { grid-column: 2; grid-row: 3; }
@media (pointer: coarse) {
  .ds-dpad { display: grid; }
  .ds-hint { display: none; }
}