:root {
  color-scheme: dark;
  --bg: #10141f;
  --accent: #5ee6ff;
  --text: #f4f1ea;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

#stage {
  position: relative;
  margin: 0 auto;
  width: 340px;
  height: 480px;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  /* Positionierung/Skalierung auf die Viewport-Größe übernimmt main.js
     (position:fixed + left/top 50% + translate(-50%,-50%) scale(...),
     daher hier bewusst der Standard-transform-origin: center). */
}

canvas#game {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.hud-score {
  position: absolute;
  top: max(10px, env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  font-size: 22px;
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
  pointer-events: none;
}

.corner-btn {
  position: absolute;
  top: max(8px, env(safe-area-inset-top));
  right: max(8px, env(safe-area-inset-right));
  z-index: 5;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.12);
  color: var(--text);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

.icon-btn:active { background: rgba(255, 255, 255, 0.22); }

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  background: rgba(16, 20, 31, 0.72);
  backdrop-filter: blur(2px);
  text-align: center;
  padding: 20px;
}

/* Autor-Stylesheets überschreiben sonst das UA-Default für [hidden],
   da beide dieselbe Spezifität haben – ohne diese Regel blieben
   Overlays trotz hidden-Attribut sichtbar und übereinander liegend. */
[hidden] {
  display: none !important;
}

.title {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.title.small { font-size: 20px; }

.btn-primary {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #0b2e35;
  font-size: 30px;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(94, 230, 255, 0.35);
}

.btn-primary:active { transform: scale(0.96); }

.hint {
  font-size: 14px;
  opacity: 0.75;
}

.best-score, .go-best {
  font-size: 13px;
  opacity: 0.8;
}

.go-score {
  font-size: 40px;
  font-weight: 800;
  color: var(--accent);
}

.row {
  display: flex;
  gap: 14px;
}

.sound-corner {
  position: absolute;
  top: max(8px, env(safe-area-inset-top));
  right: max(8px, env(safe-area-inset-right));
}