:root {
  --caption-size: 2.2vw;
  --caption-bg: rgba(0, 0, 0, 0.62);
  --accent: #53fc18;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: #000; color: #eee; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
body.overlay { background: transparent; }

/* ---- stage: 16:9 letterboxed in the viewport ---- */
.stage {
  position: relative;
  width: min(100vw, calc(100vh * 16 / 9));
  height: min(100vh, calc(100vw * 9 / 16));
  margin: auto;
  top: 50%;
  transform: translateY(-50%);
  overflow: hidden;
}
.stage:fullscreen { width: 100vw; height: 100vh; top: 0; transform: none; }
body.overlay .stage { width: 100vw; height: 100vh; top: 0; transform: none; }

.player { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: #000; }
body.overlay .player { display: none; }

/* ---- captions ---- */
.captions {
  position: absolute;
  left: 50%;
  bottom: 7%;
  transform: translateX(-50%);
  width: 90%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25em;
  pointer-events: none;
  font-size: var(--caption-size);
  line-height: 1.3;
  text-align: center;
  transition: opacity 0.4s ease;
}
.captions.idle { opacity: 0; }
.line {
  display: inline-block;
  max-width: 100%;
  padding: 0.18em 0.6em;
  border-radius: 0.3em;
  background: var(--caption-bg);
  color: #fff;
  text-shadow: 0 0 4px rgba(0, 0, 0, 0.9), 0 1px 2px rgba(0, 0, 0, 0.9);
  word-wrap: break-word;
  white-space: pre-wrap;
}
.line:empty { display: none; }
.line.prev { opacity: 0.75; font-size: 0.85em; }
.line .tag { color: var(--accent); font-size: 0.7em; margin-right: 0.5em; vertical-align: 0.15em; }
.line .tag.other { color: #ffb347; }
.captions.no-tags .tag { display: none; }

/* ---- HUD ---- */
.hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: linear-gradient(rgba(0, 0, 0, 0.7), transparent);
  font-size: 14px;
  transition: opacity 0.3s ease;
}
.hud.hidden, body.overlay .hud { opacity: 0; pointer-events: none; }
.hud-left, .hud-right { display: flex; align-items: center; gap: 8px; }
.hud button, .hud select {
  background: rgba(255, 255, 255, 0.12);
  color: #eee;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  padding: 4px 9px;
  font: inherit;
  cursor: pointer;
}
.hud button:hover, .hud select:hover { background: rgba(255, 255, 255, 0.22); }
.slug { font-weight: 600; }
.lag { color: #bbb; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; background: #888; }
.dot.live { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.dot.connecting { background: #f5c518; animation: blink 1s infinite; }
.dot.error { background: #ff4d4f; }
@keyframes blink { 50% { opacity: 0.3; } }

/* ---- history panel ---- */
.panel {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: min(420px, 90%);
  background: rgba(10, 10, 10, 0.92);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  font-size: 14px;
}
.panel.hidden, body.overlay .panel { display: none; }
.panel header { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; border-bottom: 1px solid rgba(255, 255, 255, 0.1); font-weight: 600; }
.panel header button { background: none; border: 0; color: #ccc; font-size: 20px; cursor: pointer; }
.panel ol { list-style: none; margin: 0; padding: 8px 14px; overflow-y: auto; flex: 1; }
.panel li { padding: 6px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
.panel time { color: #888; font-variant-numeric: tabular-nums; margin-right: 8px; }
.panel .tag { color: var(--accent); margin-right: 6px; }
.panel .tag.other { color: #ffb347; }
.panel .low { color: #999; }

/* ---- home ---- */
body.home { display: grid; place-items: center; }
.home-card { max-width: 520px; width: 92%; padding: 28px; background: #111; border: 1px solid #222; border-radius: 12px; }
.home-card h1 { margin: 0 0 6px; color: var(--accent); }
.home-card form { display: flex; gap: 8px; margin: 18px 0; }
.home-card input { flex: 1; padding: 10px 12px; border-radius: 8px; border: 1px solid #333; background: #000; color: #eee; font-size: 16px; }
.home-card button { padding: 10px 16px; border-radius: 8px; border: 0; background: var(--accent); color: #000; font-weight: 700; cursor: pointer; }
.channels { list-style: none; padding: 0; margin: 0 0 12px; display: flex; flex-wrap: wrap; gap: 8px; }
.channels a { display: inline-block; padding: 6px 10px; border-radius: 999px; background: #1b1b1b; color: #ddd; text-decoration: none; border: 1px solid #2a2a2a; }
.channels a:hover { border-color: var(--accent); }
.muted { color: #aaa; }
.small { font-size: 13px; }
code { background: #1b1b1b; padding: 1px 5px; border-radius: 4px; }