:root {
  --bg: #0b0f17;
  --card: #131a26;
  --text: #e8eefb;
  --muted: #9aa7bf;
  --border: #26324a;
  --primary: #5da9ff;
  --danger: #ff6b6b;
  --good: #60d394;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 18px;
}

header h1 {
  margin: 0 0 6px 0;
  font-size: 24px;
}

.lang-toggle {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  margin: 8px 0 12px;
}
.lang-label {
  font-size: 12px;
  color: var(--muted);
}
.lang-btn {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  background: #0e1420;
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
}
.lang-btn.active {
  border-color: #3a5f9a;
  background: #123a6a;
}

.sub { margin: 0 0 10px 0; color: var(--muted); line-height: 1.45; }
.warn { margin: 0; color: #ffd166; line-height: 1.45; }

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 980px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.card h2 { margin: 0 0 12px 0; font-size: 18px; }
.card h3 { margin: 16px 0 8px 0; font-size: 15px; color: #cfe2ff; }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.field.small { flex: 1; min-width: 240px; }
.field span { color: var(--muted); font-size: 13px; }
.field input[type="number"],
.field input[type="file"],
.field select {

  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0e1420;
  color: var(--text);
}

.small { font-size: 12px; }

.model-hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 2px 0 10px 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: #13233a;
  border: 1px solid #234471;
  color: #e5edff;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
}

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 10px; }

button {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: #0e1420;
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
}

button.primary { background: #123a6a; border-color: #1f4f86; }
button.secondary { background: #0e1420; }
button:disabled { opacity: 0.55; cursor: not-allowed; }

.progress {
  width: 100%;
  height: 10px;
  background: #0e1420;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin: 8px 0 8px 0;
}

.progress-bar {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 160ms linear;
}

.status {
  font-size: 13px;
  color: var(--muted);
}

.debug summary { color: var(--muted); cursor: pointer; margin-top: 10px; }
.debug pre {
  margin: 10px 0 0 0;
  padding: 10px;
  background: #0e1420;
  border: 1px solid var(--border);
  border-radius: 10px;
  max-height: 220px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 12px;
  color: #d7e3ff;
}

.video-wrap {
  position: relative;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: #000;
}

video {
  width: 100%;
  height: auto;
  display: block;
}

canvas#overlay {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hint { margin: 10px 0 0 0; color: var(--muted); font-size: 13px; line-height: 1.45; }
.requirements {
  margin: 10px 0 12px 0;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0e1420;
  font-size: 13px;
}
.requirements-title { font-weight: 600; margin-bottom: 6px; }
.requirements ul { margin: 0 0 6px 18px; padding: 0; color: var(--muted); line-height: 1.45; }
.requirements-note { color: var(--muted); font-size: 12px; }
.requirements-example {
  margin: 10px 0 12px 0;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0e1420;
}
.video-embed {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
  margin: 8px 0;
}
.video-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.summary {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #0e1420;
  line-height: 1.5;
  white-space: pre-line;
}

.flags, .advice { line-height: 1.6; }
.flags li { margin: 4px 0; }
.flags .bad { color: var(--danger); font-weight: 650; }
.flags .good { color: var(--good); font-weight: 650; }

.table-wrap { overflow: auto; }
.metrics {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.metrics th, .metrics td {
  border-bottom: 1px solid var(--border);
  padding: 10px 10px;
  text-align: left;
  vertical-align: top;
}
.metrics th { color: #cfe2ff; }

.muted { color: var(--muted); }
.mono { font-family: var(--mono); }

.footer { padding-bottom: 30px; }