:root {
  color-scheme: dark;
  --accent-1: #ffcf4d;
  --accent-2: #ff7a59;
  --accent-3: #52e0c4;
  --ink: #0b0e1a;
  --panel-bg: rgba(12, 16, 32, 0.72);
  --panel-border: rgba(255, 255, 255, 0.12);
  --text: #f4f6ff;
  --text-dim: #b9c0d9;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: var(--ink);
  overflow: hidden;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

#app {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

#game-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* ---------- Overlays / panels (same convention as the sibling game) ---------- */

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
}
.overlay.hidden { display: none; }

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  padding: clamp(16px, 3vh, 36px) clamp(20px, 4vw, 48px);
  text-align: center;
  color: var(--text);
  max-width: min(92vw, 480px);
  max-height: 92vh;
  overflow-y: auto;
}

.title {
  font-size: clamp(2rem, 6vw, 3.4rem);
  margin: 0 0 4px;
  letter-spacing: 2px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 4px 24px rgba(255, 127, 80, 0.25);
}
.title-dot { color: var(--accent-3); -webkit-text-fill-color: var(--accent-3); }

.overlay-title {
  font-size: clamp(1.4rem, 4vw, 2rem);
  margin: 0 0 18px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  margin: 0 0 clamp(14px, 3vh, 22px);
  color: var(--text-dim);
  font-size: clamp(0.75rem, 1.6vw, 0.95rem);
}

.best-score {
  color: var(--text-dim);
  font-weight: 700;
  margin-bottom: 16px;
  font-size: 0.95rem;
}
.best-score span { color: var(--accent-1); }

.final-score {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 6px;
}
.final-score span { color: var(--accent-3); }

.new-best-badge {
  display: inline-block;
  margin: 6px 0 14px;
  padding: 4px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: var(--ink);
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

.level-select { margin-bottom: 16px; }
.level-label {
  display: block;
  color: var(--text-dim);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.level-buttons { display: flex; gap: 8px; justify-content: center; }
.btn-level {
  background: rgba(255,255,255,0.08);
  color: var(--text);
  box-shadow: none;
  padding: 8px 16px;
  min-width: 44px;
}
.btn-level.active {
  background: linear-gradient(135deg, var(--accent-3), #2fb8a0);
  color: var(--ink);
}

.btn {
  font-family: inherit;
  font-weight: 700;
  letter-spacing: 0.5px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  color: var(--ink);
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  padding: 12px 22px;
  font-size: clamp(0.85rem, 1.8vw, 1rem);
  box-shadow: 0 6px 18px rgba(255, 122, 89, 0.28);
  transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.12s ease;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.96); filter: brightness(0.95); }
.btn:hover { filter: brightness(1.06); }

.btn-start { background: linear-gradient(135deg, var(--accent-3), #2fb8a0); display: block; width: 100%; margin-bottom: 10px; }
.btn-mode { background: rgba(255,255,255,0.08); color: var(--text); box-shadow: none; }

.btn-mute {
  margin-top: 6px;
  background: rgba(255,255,255,0.08);
  color: var(--text-dim);
  box-shadow: none;
  font-size: 0.8rem;
  padding: 8px 16px;
}

.overlay-actions { display: flex; flex-direction: column; gap: 10px; align-items: stretch; }

.hidden { display: none !important; }

.credit-badge {
  position: fixed;
  top: max(8px, env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  z-index: 30;
  pointer-events: auto;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  padding: 4px 12px;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.3);
  white-space: nowrap;
}
.credit-badge strong { color: var(--accent-3); font-weight: 800; }
.credit-badge:hover { color: var(--text); }

/* ---------- In-game HUD ---------- */

.hud {
  position: absolute;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}

.panel-chip {
  pointer-events: auto;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: 8px 12px;
  color: var(--text);
  box-shadow: 0 6px 16px rgba(0,0,0,0.35);
}

.hud-top-left {
  position: absolute;
  top: max(8px, env(safe-area-inset-top));
  left: max(8px, env(safe-area-inset-left));
  display: flex;
  gap: 12px;
}
.stat { display: flex; flex-direction: column; align-items: center; min-width: 40px; }
.stat-label { font-size: 0.6rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-value { font-size: 1rem; font-weight: 800; }

.hud-top-right {
  position: absolute;
  top: max(8px, env(safe-area-inset-top));
  right: max(8px, env(safe-area-inset-right));
  display: flex;
  gap: 8px;
}
.btn-icon {
  pointer-events: auto;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  box-shadow: none;
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hud-hold, .hud-next {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.hud-hold { top: 56px; left: max(8px, env(safe-area-inset-left)); }
.hud-next { top: 56px; right: max(8px, env(safe-area-inset-right)); }
.preview-label {
  font-size: 0.6rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}
#hold-canvas, #next-canvas { display: block; }

/* Wide/landscape screens: move hold/next to side margins for better use of space. */
@media (min-aspect-ratio: 1/1) {
  .hud-hold { top: 50%; left: max(16px, env(safe-area-inset-left)); transform: translateY(-120px); }
  .hud-next { top: 50%; right: max(16px, env(safe-area-inset-right)); transform: translateY(-50%); }
}

/* ---------- Touch controls (touch devices only) ---------- */

.touch-controls {
  position: absolute;
  bottom: max(10px, env(safe-area-inset-bottom));
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 12px;
  pointer-events: none;
}
.touch-group { display: flex; gap: 10px; align-items: flex-end; pointer-events: auto; }
.touch-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: var(--panel-bg);
  backdrop-filter: blur(10px);
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}
.touch-btn:active { filter: brightness(1.3); }
.touch-btn-rotate {
  width: 64px;
  height: 64px;
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--accent-2), #c8442f);
  border: none;
}
.touch-btn-drop, .touch-btn-hold {
  width: 52px;
  height: 40px;
  border-radius: 20px;
  font-size: 0.7rem;
}

@media (hover: hover) and (pointer: fine) {
  .touch-controls { display: none; }
}

@media (max-height: 420px) {
  .credit-badge { font-size: 0.55rem; padding: 3px 9px; }
  .touch-btn { width: 40px; height: 40px; font-size: 0.95rem; }
  .touch-btn-rotate { width: 54px; height: 54px; font-size: 1.2rem; }
}