:root {
  color-scheme: light;
  --ink: #17201d;
  --muted: #66716d;
  --paper: #f5f4ef;
  --panel: #ffffff;
  --border: #dfe4e1;
  --accent: #1f8a62;
  --accent-dark: #146746;
  --danger: #b64242;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: radial-gradient(circle at top left, #e0f1e9 0, transparent 34rem), var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
}

.shell { width: min(1060px, calc(100% - 32px)); margin: 0 auto; padding: 64px 0 32px; }
.hero { max-width: 720px; margin-bottom: 28px; }
.eyebrow { color: var(--accent-dark); font-size: 13px; font-weight: 700; letter-spacing: .14em; }
h1 { margin: 10px 0 12px; font-size: clamp(34px, 7vw, 58px); line-height: 1.05; letter-spacing: -.04em; }
.hero p { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.7; }

.panel {
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: 0 14px 40px rgba(28, 47, 40, .07);
}

.input-panel { padding: 24px; }
label { display: block; margin-bottom: 10px; font-weight: 700; }
textarea {
  width: 100%; resize: vertical; min-height: 126px; padding: 16px;
  border: 1px solid #cfd7d3; border-radius: 12px; color: var(--ink); background: #fcfdfc;
  font: inherit; line-height: 1.6; outline: none;
}
textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(31, 138, 98, .12); }
.actions { display: flex; align-items: center; gap: 18px; margin-top: 16px; }
button, .download-button {
  border: 0; border-radius: 11px; padding: 12px 20px; color: white; background: var(--accent);
  font: inherit; font-weight: 700; cursor: pointer; text-decoration: none; transition: .18s ease;
}
button:hover, .download-button:hover { background: var(--accent-dark); transform: translateY(-1px); }
button:disabled { opacity: .55; cursor: wait; transform: none; }
.privacy, .expiry { color: var(--muted); font-size: 13px; }

.progress-panel { display: flex; align-items: center; margin-top: 18px; padding: 18px 24px; }
.stage { display: flex; align-items: center; gap: 9px; color: var(--muted); white-space: nowrap; }
.stage span { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: #edf0ee; font-size: 13px; }
.stage p { margin: 0; font-size: 14px; }
.stage.active, .stage.done { color: var(--accent-dark); }
.stage.active span, .stage.done span { color: white; background: var(--accent); }
.line { flex: 1; height: 1px; margin: 0 14px; background: var(--border); }

.error-panel { margin-top: 18px; padding: 20px 24px; border-color: #efc7c7; color: var(--danger); }
.error-panel p { margin: 8px 0; }
.error-panel small { color: var(--muted); }

.result-panel { display: grid; grid-template-columns: minmax(280px, 42%) 1fr; gap: 28px; margin-top: 18px; padding: 24px; }
.video-wrap { display: grid; place-items: center; min-height: 360px; overflow: hidden; border-radius: 14px; background: #111; }
video { display: block; width: 100%; max-height: 570px; }
.details { align-self: center; }
.success-tag { display: inline-block; padding: 6px 10px; border-radius: 99px; color: var(--accent-dark); background: #e4f4ec; font-size: 12px; font-weight: 700; }
h2 { margin: 16px 0 22px; font-size: 25px; line-height: 1.45; }
dl { margin: 0 0 26px; }
dl div { display: grid; grid-template-columns: 78px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid #edf0ee; }
dt { color: var(--muted); } dd { margin: 0; overflow-wrap: anywhere; }
.download-button { display: inline-block; }
.expiry { margin: 13px 0 0; }
footer { padding: 28px 4px 0; color: var(--muted); font-size: 13px; text-align: center; }

@media (max-width: 720px) {
  .shell { padding-top: 36px; }
  .actions { align-items: flex-start; flex-direction: column; }
  .progress-panel { padding: 16px; }
  .stage { flex-direction: column; gap: 5px; }
  .stage p { font-size: 12px; }
  .line { margin: 0 7px; }
  .result-panel { grid-template-columns: 1fr; padding: 16px; }
  .video-wrap { min-height: 260px; }
}