:root {
  --bg: #0b0f17;
  --card: #141b2b;
  --card2: #1b2438;
  --accent: #5b8cff;
  --accent2: #7c5cff;
  --ok: #34d399;
  --text: #e7ecf5;
  --muted: #8b97ad;
  --border: #25304a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1a2540 0%, var(--bg) 60%);
  color: var(--text);
  min-height: 100vh;
}
header { text-align: center; padding: 48px 20px 16px; }
h1 { font-size: 44px; margin: 0; letter-spacing: -1px; }
h1 .dot { color: var(--accent); }
.tag { color: var(--muted); max-width: 620px; margin: 12px auto 0; line-height: 1.5; }
.tag strong { color: var(--text); }
main { max-width: 760px; margin: 0 auto; padding: 16px 20px 60px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  margin-bottom: 20px;
}
.hidden { display: none; }
.file-drop {
  display: flex; align-items: center; justify-content: center;
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 38px 20px;
  cursor: pointer;
  color: var(--muted);
  transition: all .15s;
  text-align: center;
}
.file-drop:hover, .file-drop.drag { border-color: var(--accent); color: var(--text); background: var(--card2); }
.row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin-top: 16px; }
@media (max-width: 640px) { .row { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; color: var(--muted); }
select {
  background: var(--card2); color: var(--text);
  border: 1px solid var(--border); border-radius: 9px; padding: 10px;
  font-size: 14px;
}
button {
  margin-top: 18px;
  width: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: white; border: 0; border-radius: 11px;
  padding: 14px; font-size: 16px; font-weight: 600; cursor: pointer;
  transition: opacity .15s, transform .05s;
}
button:hover { opacity: .92; }
button:active { transform: translateY(1px); }
button:disabled { opacity: .4; cursor: not-allowed; }
.hint { color: var(--muted); font-size: 13px; margin-top: 10px; text-align: center; }
.steps { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.step { color: var(--muted); font-size: 14px; padding: 6px 10px; border-radius: 8px; }
.step .ic { display: inline-block; width: 22px; }
.step.active { color: var(--text); background: var(--card2); }
.step.done { color: var(--ok); }
.step.done .ic::after { content: " ✓"; }
.bar { height: 8px; background: var(--card2); border-radius: 99px; overflow: hidden; }
#barFill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--ok)); transition: width .3s; }
#log {
  margin-top: 14px; max-height: 160px; overflow: auto;
  font-size: 12px; color: var(--muted); white-space: pre-wrap;
  background: #0c111c; border-radius: 8px; padding: 10px;
}
.videowrap { position: relative; margin-top: 8px; }
video { width: 100%; border-radius: 12px; background: #000; display: block; }
#subOverlay {
  position: absolute; left: 0; right: 0; bottom: 52px;
  text-align: center; padding: 0 16px; pointer-events: none;
  font-size: clamp(16px, 2.6vw, 24px); font-weight: 600; line-height: 1.35;
  color: #fff; text-shadow: 0 2px 6px #000, 0 0 14px #000;
}
#subOverlay:not(:empty)::before {
  content: ""; /* el contenido se inyecta por JS; estilo solo cuando hay texto */
}
.subbar { display: flex; align-items: center; gap: 12px; margin-top: 8px; }
.subbar .hint { margin-top: 0; text-align: left; flex: 1; }
button.ghost {
  width: auto; margin-top: 0; background: transparent; border: 1px solid var(--border);
  color: var(--text); font-size: 13px; padding: 8px 12px;
}
button.ghost:hover { border-color: var(--accent); opacity: 1; }
.tips {
  margin-top: 14px; background: #0c111c; border: 1px solid var(--border);
  border-radius: 10px; padding: 14px; font-size: 13px; color: var(--muted);
}
.tips strong { color: var(--text); }
.tips p { margin: 8px 0; line-height: 1.5; }
.tips pre, .tips code {
  background: #06090f; color: #cdd7ea; border-radius: 6px;
  font-size: 12px; overflow-x: auto;
}
.tips pre { padding: 10px; white-space: pre-wrap; }
.tips code { padding: 1px 5px; }
.hint a { color: var(--accent); cursor: pointer; }
.downloads { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.downloads button { width: auto; flex: 1; min-width: 180px; margin-top: 0; font-size: 14px; padding: 11px; }
details { margin-top: 18px; }
summary { cursor: pointer; color: var(--accent); }
#segs { margin-top: 12px; max-height: 320px; overflow: auto; }
.seg { padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
.seg .t { color: var(--muted); font-size: 12px; }
.seg .o { color: var(--muted); }
.seg .tr { color: var(--text); }
footer { text-align: center; color: var(--muted); font-size: 12px; padding: 20px; }