*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

/* Game pages: full-bleed canvas stage with a radial vignette. */
.stage {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(120% 120% at 50% 18%, #1a1426 0%, var(--bg) 55%, #070510 100%);
  overflow: hidden;
}

.stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none; /* critical: stop mobile scroll/zoom stealing the gesture */
}

/* ---- HUD overlay ---- */
.hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  font-family: var(--font);
}
.hud > * { pointer-events: auto; }

.hud-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 18px clamp(14px, 4vw, 34px);
}
.hud-back {
  color: var(--dim);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(13, 11, 20, 0.5);
  backdrop-filter: blur(6px);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.hud-back:hover { color: var(--ink); border-color: var(--accent); }

.hud-left { display: flex; align-items: center; gap: 10px; }
.hud-level {
  font: 11px/1 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(13, 11, 20, 0.5);
  backdrop-filter: blur(6px);
}

.hud-title { text-align: center; flex: 1; }
.hud-eyebrow {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--accent);
}
.hud-title h1 {
  margin: 2px 0 0;
  font-size: clamp(18px, 3.4vw, 26px);
  font-weight: 600;
  letter-spacing: -0.01em;
}
.hud-score {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  min-width: 64px;
}
.hud-score b {
  font-size: 26px;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  line-height: 1;
}
.hud-score small {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--dim);
}

.hud-hint {
  position: absolute;
  left: 50%;
  bottom: 78px;
  transform: translateX(-50%);
  margin: 0;
  padding: 8px 16px;
  font-size: 13px;
  color: var(--dim);
  background: rgba(13, 11, 20, 0.55);
  border: 1px solid var(--line);
  border-radius: 999px;
  backdrop-filter: blur(6px);
  text-align: center;
  max-width: 86vw;
  opacity: 0.85;
  transition: opacity 0.3s var(--ease), color 0.3s var(--ease);
}
.hud-hint.show { opacity: 1; color: var(--ink); }

.hud-controls {
  position: absolute;
  right: clamp(14px, 4vw, 34px);
  bottom: 24px;
  display: flex;
  gap: 10px;
}
.hud-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(13, 11, 20, 0.55);
  color: var(--ink);
  font-size: 20px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}
.hud-btn:hover { border-color: var(--accent); transform: translateY(-2px); }
.hud-btn[data-restart]:hover { transform: rotate(-90deg); }
.hud-btn:active { transform: scale(0.92); }

/* ---- win / level overlay ---- */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(60% 60% at 50% 45%, rgba(8,6,14,0.7), rgba(8,6,14,0.9));
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease);
}
.overlay.show { opacity: 1; pointer-events: auto; }
.overlay-card {
  text-align: center;
  padding: 34px clamp(28px, 6vw, 54px);
  border-radius: var(--radius);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
  background: linear-gradient(180deg, #171221, #0f0c17);
  box-shadow: 0 30px 80px -30px var(--accent);
  transform: translateY(12px) scale(0.96);
  transition: transform 0.4s var(--ease);
  max-width: 90vw;
}
.overlay.show .overlay-card { transform: translateY(0) scale(1); }
.overlay-kicker {
  margin: 0 0 8px;
  font: 11px/1 var(--mono);
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--accent);
}
.overlay-title {
  margin: 0;
  font-size: clamp(26px, 5vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
}
.overlay-sub { margin: 10px 0 0; color: var(--dim); font-size: 14px; max-width: 36ch; }
.overlay-actions { display: flex; gap: 12px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }
.overlay-btn {
  font: 14px/1 var(--font);
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.overlay-btn:hover { transform: translateY(-2px); border-color: var(--accent); }
.overlay-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0c0a12;
  font-weight: 600;
}
.overlay-btn.primary:hover { filter: brightness(1.08); }