:root {
  --bg: #0f1420;
  --panel: #171e2e;
  --line: #263149;
  --text: #e8ecf5;
  --muted: #93a0ba;
  --accent: #ffd400;
  color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.5;
}
header, main { max-width: 960px; margin: 0 auto; padding: 24px 16px; }
header { padding-bottom: 0; }
h1 { margin: 0; font-size: 28px; }
header p { margin: 4px 0 0; color: var(--muted); }
h2 { margin: 0 0 12px; font-size: 18px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin-bottom: 16px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.card { text-align: left; background: var(--bg); color: var(--text); border: 2px solid var(--line); border-radius: 10px; padding: 12px; cursor: pointer; display: flex; flex-direction: column; gap: 4px; font: inherit; }
.card span { color: var(--muted); font-size: 14px; }
.card.active { border-color: var(--accent); }
.row { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.label { color: var(--muted); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button { background: var(--bg); color: var(--text); border: 0; padding: 8px 14px; cursor: pointer; font: inherit; }
.seg button.active { background: var(--accent); color: #111; font-weight: 600; }
.split { display: grid; grid-template-columns: 1fr 240px; gap: 16px; }
@media (max-width: 720px) { .split { grid-template-columns: 1fr; } }
.form { display: grid; gap: 12px; align-content: start; }
.field { display: grid; gap: 4px; font-size: 14px; }
.field span { color: var(--muted); }
input, textarea { width: 100%; background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; font: inherit; }
input[type=color] { padding: 2px; height: 38px; }
.preview-wrap { display: grid; justify-items: center; gap: 6px; align-content: start; }
.preview-wrap small { color: var(--muted); text-align: center; }
.preview { width: 100%; max-width: 220px; max-height: 300px; border: 3px solid var(--line); border-radius: 10px; display: flex; align-items: center; justify-content: center; padding: 12px; text-align: center; font-weight: 800; overflow: hidden; word-break: break-word; }
.primary { background: var(--accent); color: #111; border: 0; border-radius: 10px; padding: 12px 22px; font: inherit; font-weight: 700; cursor: pointer; }
.primary:disabled { opacity: .5; cursor: progress; }
.steps { display: flex; gap: 8px; list-style: none; padding: 0; margin: 16px 0 0; flex-wrap: wrap; }
.steps li { padding: 4px 12px; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.steps li.active { border-color: var(--accent); color: var(--accent); }
.steps li.complete { background: #1f3a2b; border-color: #2f6b49; color: #8fe0b0; }
.steps.failed li { border-color: #6b2f2f; color: #e08f8f; }
.message { color: var(--muted); margin: 12px 0 0; }
.message a { color: var(--accent); }
#result { margin-top: 16px; display: grid; gap: 12px; justify-items: start; }
video { max-width: 100%; border-radius: 10px; background: #000; }
video.tall { max-height: 520px; }
video.wide { width: 100%; max-width: 720px; }
.download { color: #111; background: var(--accent); padding: 8px 16px; border-radius: 8px; text-decoration: none; font-weight: 600; }
.history { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.history button { background: none; border: 0; color: var(--text); text-decoration: underline; cursor: pointer; font: inherit; padding: 0; text-align: left; }