html, body {
  margin: 0;
  height: 100%;
  background: #000;
  color: #e8e0d0;
  font-family: system-ui, "Microsoft YaHei", sans-serif;
  overflow: hidden;
  touch-action: manipulation;   /* taps start playback without double-tap zoom */
}
#stage {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  background: #000;
}
#screen {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
#mv {
  display: block;
  background: #000;
}
.hidden { display: none !important; }

#overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  padding: 0 24px;
  background: rgba(0, 0, 0, .82);
}
#overlay h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 2px;
  color: #FFD75F;
}
#overlay p { margin: 0; max-width: 660px; line-height: 1.7; }
#overlay .dim { color: #AF875F; font-size: 13px; }

#toast {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 16px;
  border: 1px solid #875F00;
  border-radius: 6px;
  background: rgba(0, 0, 0, .8);
  color: #FFD75F;
  font-size: 14px;
}

#stats {
  position: absolute;
  top: 10px;
  right: 12px;
  padding: 4px 10px;
  border: 1px solid #5F5F00;
  border-radius: 6px;
  background: rgba(0, 0, 0, .65);
  color: #AF875F;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}