:root {
  --bg: #0b1020;
  --bg2: #05070c;
  --card: rgba(26, 34, 51, 0.9);
  --line: rgba(255, 255, 255, 0.1);
  --text: #f5f7fa;
  --muted: rgba(255, 255, 255, 0.55);
  --coral: #ff6b6b;
  --teal: #4fccc4;
  --mint: #6ee7b7;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: linear-gradient(160deg, var(--bg), var(--bg2));
  min-height: 100vh;
}
.app { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header h1 { margin: 0; font-size: 30px; letter-spacing: -0.5px; }
.tagline { color: var(--muted); margin: 4px 0 24px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px;
  margin-bottom: 18px;
}
video {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #000;
  border-radius: 14px;
  object-fit: cover;
}
.controls { display: flex; align-items: center; gap: 14px; margin-top: 14px; }
button {
  background: #fff; color: #000; border: 0; border-radius: 999px;
  padding: 11px 20px; font-weight: 600; cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: default; }
.status { color: var(--muted); font-size: 14px; }
.api { display: block; color: var(--muted); font-size: 13px; margin-top: 14px; }
.api input {
  display: block; width: 100%; margin-top: 4px; padding: 8px 10px;
  background: rgba(0,0,0,0.3); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px; font: inherit;
}
.result h2, .card h2 { margin: 0 0 12px; font-size: 16px; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.metric { background: rgba(0,0,0,0.25); border-radius: 14px; padding: 14px; text-align: center; }
.metric .label { display: block; color: var(--muted); font-size: 12px; }
.metric .value { display: block; font-size: 30px; font-weight: 700; font-variant-numeric: tabular-nums; }
.metric:nth-child(1) .value { color: var(--coral); }
.metric:nth-child(2) .value { color: var(--teal); }
.metric:nth-child(3) .value { color: var(--mint); }
.metric .unit { color: var(--muted); font-size: 12px; }
.note { color: var(--coral); font-size: 13px; min-height: 1em; }
.recent { list-style: none; padding: 0; margin: 0; font-variant-numeric: tabular-nums; }
.recent li { padding: 6px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.recent li:last-child { border-bottom: 0; }
.muted { color: var(--muted); }
.hidden { display: none; }
footer { margin-top: 8px; }
footer .muted { font-size: 12px; }