:root {
  --bg: #0f1419;
  --card: #1a212b;
  --card2: #222c38;
  --text: #e6edf3;
  --muted: #8b97a7;
  --accent: #36c2a0;
  --accent2: #2a9d83;
  --border: #2d3744;
  --danger: #e5534b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header {
  text-align: center;
  padding: 28px 16px 8px;
}
header h1 { margin: 0; font-size: 1.8rem; }
.subtitle { color: var(--muted); margin: 6px 0 0; }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 18px 20px;
}
.card h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent);
  color: #04211b;
  font-size: 0.9rem;
  font-weight: 700;
  flex: none;
}

.hint { color: var(--muted); font-size: 0.9rem; margin: 0 0 12px; }

.video-wrap {
  position: relative;
  width: 100%;
  background: #000;
  border-radius: 10px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  margin-bottom: 12px;
}
.video-wrap video { width: 100%; height: 100%; object-fit: cover; display: block; }

.row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--card2);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 0.97rem;
  min-height: 44px;
  cursor: pointer;
  transition: transform 0.05s, background 0.15s, opacity 0.15s;
  touch-action: manipulation;
}
.btn:hover { background: #2b3744; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.primary { background: var(--accent); color: #04211b; border-color: transparent; font-weight: 600; }
.btn.primary:hover { background: var(--accent2); }
.btn.recording { background: var(--danger); color: #fff; border-color: transparent; }

.rec-time { font-variant-numeric: tabular-nums; color: var(--danger); font-weight: 600; }
.status-inline { color: var(--accent); font-size: 0.9rem; }

.file-label {
  color: var(--muted);
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: underline dotted;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.grid label { display: flex; flex-direction: column; font-size: 0.85rem; color: var(--muted); gap: 5px; }
.grid label.slider { grid-column: span 1; }
.grid input[type="text"],
.grid input[type="number"],
.grid select {
  background: var(--card2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 10px;
  border-radius: 8px;
  font-size: 0.95rem;
}
.grid small { color: #6b7787; font-size: 0.75rem; }
.grid b { color: var(--accent); }
input[type="range"] { accent-color: var(--accent); width: 100%; }

#viewer {
  width: 100%;
  height: 360px;
  background: linear-gradient(180deg, #11161d, #0c1014);
  border-radius: 10px;
  overflow: hidden;
  touch-action: none;
}

.result { margin: 14px 0 0; font-size: 0.95rem; min-height: 1.4em; }
.result.ok { color: var(--accent); }
.result.err { color: var(--danger); }
.result.busy { color: var(--muted); }

footer {
  max-width: 760px;
  margin: 8px auto 40px;
  padding: 0 16px;
  color: #6b7787;
  font-size: 0.8rem;
  text-align: center;
}

/* --- Scan / FootScan --- */
.scan-ref { display: flex; flex-direction: column; gap: 5px; font-size: 0.85rem; color: var(--muted); margin-bottom: 12px; }
.scan-ref select {
  background: var(--card2); border: 1px solid var(--border); color: var(--text);
  padding: 9px 10px; border-radius: 8px; font-size: 0.95rem;
}
.scan-stage {
  width: 100%; background: #000; border-radius: 10px; overflow: hidden;
  margin-bottom: 10px; display: flex; justify-content: center;
}
.scan-stage.small { background: #0c1014; }
.scan-stage video, .scan-stage canvas { max-width: 100%; height: auto; display: block; }
.scan-stage canvas { cursor: crosshair; touch-action: manipulation; }

.scan-results { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 14px; }
.scan-readout { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.scan-readout > div {
  flex: 1; min-width: 90px; background: var(--card2); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 12px; text-align: center;
}
.scan-readout span { display: block; font-size: 0.75rem; color: var(--muted); }
.scan-readout b { font-size: 1.05rem; color: var(--accent); }
.scan-arch { margin: 6px 0 14px; }
.scan-arch summary { cursor: pointer; color: var(--text); font-size: 0.92rem; padding: 6px 0; }

@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  .btn {
    min-height: 52px;
    font-size: 1.02rem;
    padding: 14px 20px;
  }
  .file-label {
    font-size: 1rem;
    padding: 8px 12px;
    display: inline-block;
  }
  .card h2 { font-size: 1.2rem; }
  .hint { font-size: 0.95rem; }
  .scan-readout > div { min-height: 58px; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}
.result.busy { animation: pulse 1.4s ease-in-out infinite; }