[hidden] { display: none !important; }

:root {
  --bg: #0b0b0d;
  --panel: rgba(18, 18, 22, 0.92);
  --line: rgba(255, 255, 255, 0.12);
  --text: #e9e6e6;
  --muted: #9a9497;
  --red: #e0212f;
  --red-soft: rgba(224, 33, 47, 0.18);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  overflow: hidden;
}

#app {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
}

#stage {
  position: relative;
  flex: 1;
  min-height: 0;
  display: grid;
  place-items: center;
  background: #000;
}

#unity-canvas {
  display: block;
  background: #000;
  outline: none;
}

/* ---------------- 载入封面 ---------------- */
#cover {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(20px, 5vw, 64px);
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.35) 55%, rgba(0, 0, 0, 0.1) 100%),
              url("cover.jpg") center / cover no-repeat;
  transition: opacity 0.6s ease;
}
#cover.done { opacity: 0; pointer-events: none; }
.cover-text h1 {
  margin: 0.1em 0 0;
  font-size: clamp(40px, 8vw, 96px);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
}
.cover-text h1 span {
  display: block;
  margin-top: 0.35em;
  font-size: 0.32em;
  font-weight: 500;
  letter-spacing: 0.5em;
  color: var(--red);
}
.eyebrow { margin: 0; color: var(--muted); letter-spacing: 0.2em; text-transform: uppercase; font-size: 12px; }
.sub { margin: 1.2em 0 0; color: var(--muted); letter-spacing: 0.3em; }
.loader { width: min(420px, 100%); }
.bar { height: 2px; background: var(--line); overflow: hidden; }
#bar-fill { height: 100%; width: 0; background: var(--red); transition: width 0.2s ease; }
#load-text { margin: 10px 0 0; color: var(--muted); font-size: 12px; letter-spacing: 0.1em; }

#hint {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  color: var(--muted);
  font-size: 12px;
  pointer-events: none;
}

/* ---------------- 控制条 ---------------- */
#controls {
  background: var(--panel);
  border-top: 1px solid var(--line);
  padding: 10px 16px 12px;
}
.row { display: flex; align-items: center; gap: 12px; }
.buttons-row { justify-content: space-between; flex-wrap: wrap; row-gap: 8px; margin-top: 8px; }
.group { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }

#track { position: relative; flex: 1; height: 28px; }
.segments { position: absolute; inset: 9px 0 auto; height: 10px; }
.band {
  position: absolute;
  top: 0;
  height: 10px;
  border-left: 1px solid rgba(255, 255, 255, 0.25);
}
.band::after {
  content: attr(data-label);
  position: absolute;
  top: -15px;
  left: 4px;
  font-size: 10px;
  color: var(--muted);
  white-space: nowrap;
}
#scrub {
  position: absolute;
  inset: 0;
  width: 100%;
  margin: 0;
  background: transparent;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}
#scrub::-webkit-slider-runnable-track {
  height: 4px;
  margin-top: 1px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--red) var(--pct, 0%), rgba(255, 255, 255, 0.18) var(--pct, 0%));
}
#track { --pct: 0%; }
#scrub::-moz-range-track { height: 4px; border-radius: 2px; background: rgba(255, 255, 255, 0.18); }
#scrub::-moz-range-progress { height: 4px; border-radius: 2px; background: var(--red); }
#scrub::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  margin-top: -5px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 3px var(--red-soft);
}
#scrub::-moz-range-thumb { width: 14px; height: 14px; border: 0; border-radius: 50%; background: #fff; }

button {
  font: inherit;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
}
button:hover { border-color: rgba(255, 255, 255, 0.35); }
button:focus-visible { outline: 2px solid var(--red); outline-offset: 2px; }
.icon { width: 34px; height: 34px; display: grid; place-items: center; padding: 0; }
.icon svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon.primary { border-color: var(--red); background: var(--red-soft); }
.icon.primary svg path { fill: currentColor; }
#ico-pause path { fill: none; }
.chip { height: 30px; padding: 0 12px; font-size: 13px; }
.chip.on { border-color: var(--red); background: var(--red-soft); }
.seg-toggle { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg-toggle button { border: 0; border-radius: 0; height: 30px; padding: 0 10px; font-size: 12px; color: var(--muted); }
.seg-toggle button.on { color: var(--text); background: var(--red-soft); }
#readout { margin-left: 8px; color: var(--muted); font-variant-numeric: tabular-nums; font-size: 13px; }
#readout b { color: var(--text); font-weight: 600; }

/* ---------------- 说明 ---------------- */
#info {
  position: absolute;
  right: 16px;
  bottom: 120px;
  width: min(420px, calc(100% - 32px));
  max-height: calc(100% - 140px);
  overflow: auto;
  padding: 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  backdrop-filter: blur(6px);
}
#info h2 { margin: 0 0 10px; font-size: 16px; }
#info dt { margin-top: 10px; color: var(--red); font-size: 12px; letter-spacing: 0.1em; }
#info dd { margin: 4px 0 0; color: var(--text); font-size: 13px; }
#info code { font-size: 12px; color: var(--muted); }
#info a { color: var(--text); }
#info .fine { margin: 14px 0 12px; color: var(--muted); font-size: 12px; }

@media (max-width: 640px) {
  #controls { padding: 8px 12px 10px; }
  #readout { flex-basis: 100%; margin: 4px 0 0; }
  .band::after { display: none; }
  #info { bottom: 160px; }
}