:root {
  --bg: #0b1030;
  --ink: #fff6d6;
  --ink-dim: #c9bfa0;
  --wood: #8a5429;
  --wood-dark: #3a200d;
  --wood-light: #b77a3d;
  --gold: #f0b43c;
  --gold-dark: #b37a14;
  --danger: #ff4d4d;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: 'DotGothic16', 'Microsoft JhengHei', 'PingFang TC', monospace;
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  max-width: 520px;
  margin: 0 auto;
  padding: max(8px, env(safe-area-inset-top)) 16px max(12px, env(safe-area-inset-bottom));
  gap: 8px;
}

/* ---- HUD ---- */

.hud {
  display: flex;
  gap: 8px;
  justify-content: space-between;
  align-items: stretch;
}

.hud-box {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4px 6px;
  background: #1d215a;
  border: 3px solid var(--wood-dark);
  box-shadow: inset 0 0 0 2px #2e2a6a;
  min-width: 0;
}

.hud-label { font-size: 12px; color: var(--ink-dim); }
.hud-value { font-size: 20px; line-height: 1.1; }
.hud-level { color: #ff8a5c; }
.hud-btn {
  flex: 0 0 auto;
  width: 48px;
  font: inherit;
  font-size: 18px;
  color: var(--ink);
  background: #1d215a;
  border: 3px solid var(--wood-dark);
  box-shadow: inset 0 0 0 2px #2e2a6a, 0 3px 0 var(--wood-dark);
  cursor: pointer;
}

.hud-btn:active:not(:disabled) { transform: translateY(2px); box-shadow: inset 0 0 0 2px #2e2a6a; }
.hud-btn:disabled { opacity: 0.4; cursor: default; }

/* ---- 遊戲區 ---- */

#stage {
  flex: 1;
  min-height: 0;
  display: grid;
  place-items: center;
}

.frame {
  position: relative;
  border: 6px solid var(--wood);
  box-shadow:
    0 0 0 3px var(--wood-dark),
    inset 0 0 0 3px var(--wood-light),
    0 8px 0 3px var(--wood-dark);
  line-height: 0;
}

#game {
  display: block;
  touch-action: none;
  image-rendering: pixelated;
  cursor: pointer;
}

/* ---- 覆蓋畫面 ---- */

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px;
  text-align: center;
  line-height: 1.5;
  background: rgba(8, 10, 30, 0.78);
}

.overlay[hidden] { display: none; }

.title {
  margin: 0;
  font-size: 40px;
  color: var(--gold);
  text-shadow: 3px 3px 0 var(--wood-dark);
  letter-spacing: 4px;
}

h2.title { font-size: 32px; }
.subtitle { margin: 0; font-size: 14px; color: var(--ink-dim); letter-spacing: 2px; }
.hint { margin: 8px 0; font-size: 15px; }
.small { margin: 0; font-size: 14px; color: var(--ink-dim); }
.big { margin: 0; font-size: 26px; }
.record { margin: 0; font-size: 18px; color: var(--danger); animation: blink 0.6s steps(2) infinite; }

.over-tier { display: flex; flex-direction: column; align-items: center; gap: 4px; font-size: 14px; }
#over-tier { width: 64px; height: 64px; image-rendering: pixelated; }
#title-moon { width: 96px; height: 96px; image-rendering: pixelated; filter: drop-shadow(0 0 12px rgba(255, 241, 168, 0.5)); }
.keys { font-size: 12px; opacity: 0.8; }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

.toast {
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  padding: 8px 14px;
  font-size: 15px;
  line-height: 1.3;
  white-space: nowrap;
  color: var(--ink);
  background: var(--wood-dark);
  border: 3px solid var(--gold);
}

.toast[hidden] { display: none; }

.pixel-btn {
  font: inherit;
  font-size: 20px;
  color: var(--wood-dark);
  background: var(--gold);
  border: 3px solid var(--wood-dark);
  box-shadow: inset -3px -3px 0 var(--gold-dark), 0 4px 0 var(--wood-dark);
  padding: 8px 28px;
  margin-top: 6px;
  cursor: pointer;
}

.pixel-btn.secondary { background: #8fd0ff; box-shadow: inset -3px -3px 0 #4a8fc2, 0 4px 0 var(--wood-dark); }

.pixel-btn:active { transform: translateY(3px); box-shadow: inset -3px -3px 0 var(--gold-dark), 0 1px 0 var(--wood-dark); }

@keyframes blink { 50% { opacity: 0; } }