:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1c2330;
  --muted: #5d6879;
  --border: #dde2ea;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --keep: #16a34a;
  --blur: #dc2626;
  --warn-bg: #fff7e6;
  --warn-border: #f5c46b;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --surface: #1b2029;
    --text: #e6e9ef;
    --muted: #9aa4b5;
    --border: #2d3441;
    --accent: #4f8cff;
    --warn-bg: #2d2412;
    --warn-border: #7a5a1c;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
[hidden] { display: none !important; }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 12px 24px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; font-size: 17px; }
.local-badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--keep);
  border: 1px solid currentColor; border-radius: 999px; padding: 3px 10px;
}

.steps { display: flex; gap: 4px; padding: 12px 24px 0; flex-wrap: wrap; }
.steps button {
  border: none; background: transparent; color: var(--muted); padding: 8px 12px; border-radius: 8px 8px 0 0;
  font: inherit; cursor: pointer; border-bottom: 2px solid transparent;
}
.steps button.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.steps button:disabled { opacity: 0.45; cursor: default; }

main { max-width: 1200px; margin: 0 auto; padding: 16px 24px 48px; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; }
h1 { font-size: 22px; margin: 0 0 6px; }
.lead { color: var(--muted); margin: 0 0 16px; max-width: 80ch; }
.lead.warn { color: var(--text); background: var(--warn-bg); border: 1px solid var(--warn-border); padding: 8px 12px; border-radius: 8px; }

button {
  font: inherit; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); cursor: pointer;
}
button:hover:not(:disabled) { border-color: var(--accent); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.drop {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  border: 2px dashed var(--border); border-radius: var(--radius); padding: 48px 16px; cursor: pointer;
  color: var(--muted); text-align: center;
}
.drop strong { color: var(--text); }
.drop.over, .drop:hover { border-color: var(--accent); }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }

.status { color: var(--muted); font-size: 14px; min-height: 1.5em; margin: 8px 0; }
.status.error { color: var(--blur); }

.split { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 20px; align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

video, canvas.preview, canvas.analysis-canvas {
  width: 100%; background: #000; border-radius: 8px; display: block; max-height: 60vh; object-fit: contain;
}
canvas.analysis-canvas { max-width: 640px; margin-top: 12px; }

.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.row input[type=number] { width: 64px; font: inherit; padding: 6px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.transport input[type=range] { flex: 1; }
.time { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 14px; }
button.icon { width: 44px; }

.people-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-weight: 600; }
.people { display: flex; flex-direction: column; gap: 12px; max-height: 62vh; overflow: auto; padding-right: 4px; }
.person { border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }
.person-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.person-head button { padding: 3px 8px; font-size: 12px; }
.faces { display: flex; flex-wrap: wrap; gap: 6px; }
.face {
  position: relative; width: 76px; height: 76px; padding: 0; border-radius: 8px; overflow: hidden;
  border: 3px solid var(--blur);
}
.face img { width: 100%; height: 100%; display: block; object-fit: cover; }
.face .tag {
  position: absolute; left: 0; right: 0; bottom: 0; font-size: 10px; font-weight: 700; letter-spacing: 0.04em;
  background: var(--blur); color: #fff; text-align: center; padding: 1px 0;
}
.face img { filter: blur(2px); }
.face.keep { border-color: var(--keep); }
.face.keep .tag { background: var(--keep); }
.face.keep img { filter: none; }

.actions { display: flex; gap: 10px; margin-top: 18px; }
.settings { margin: 0 0 12px; border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; }
.settings summary { cursor: pointer; font-weight: 600; }
.settings label, .side-col label { display: block; margin: 10px 0; }
.settings small, .side-col small { display: block; color: var(--muted); font-size: 12px; }
label.check small { display: inline; }
input[type=range] { vertical-align: middle; width: 200px; accent-color: var(--accent); }
.transport input[type=range] { width: auto; }
select { font: inherit; padding: 4px; border-radius: 6px; background: var(--surface); color: var(--text); border: 1px solid var(--border); }
output { font-variant-numeric: tabular-nums; margin-left: 6px; }

.progress { height: 8px; background: var(--border); border-radius: 99px; overflow: hidden; margin-top: 14px; }
.progress .bar { height: 100%; width: 0; background: var(--accent); transition: width 0.15s; }

.export-box { margin-top: 16px; border-top: 1px solid var(--border); padding-top: 14px; }
.download {
  display: inline-block; margin-top: 6px; padding: 8px 14px; border-radius: 8px; background: var(--keep); color: #fff;
  text-decoration: none; font-weight: 600;
}
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 12px; }

/* Keep the step-2 "Next" button reachable without scrolling. */
#step2 .actions {
  position: sticky; bottom: 0; background: var(--surface);
  padding: 12px 0; margin-bottom: -8px; border-top: 1px solid var(--border);
}

/* Manual blur */
canvas.preview.drawing { cursor: crosshair; outline: 3px solid #facc15; outline-offset: -3px; touch-action: none; }
.draw-hint { margin: 6px 0 0; font-size: 13px; color: var(--text); background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: 6px; padding: 4px 8px; }
.manual-box { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 12px; }
.manual-box > small { display: block; color: var(--muted); font-size: 12px; margin: 6px 0 8px; }
.manual-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
#drawToggle[aria-pressed="true"] { background: #facc15; border-color: #eab308; color: #1c2330; font-weight: 600; }
.manual-list { display: flex; flex-direction: column; gap: 6px; }
.manual-item { border: 1px solid var(--border); border-radius: 8px; padding: 6px 8px; font-size: 13px; cursor: pointer; }
.manual-item.selected { border-color: #eab308; box-shadow: 0 0 0 2px rgba(250, 204, 21, 0.35); }
.manual-item .mi-head { display: flex; justify-content: space-between; align-items: center; gap: 6px; }
.manual-item .mi-times { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; margin-top: 4px; }
.manual-item input[type=number] { width: 64px; font: inherit; padding: 2px 4px; border-radius: 4px; border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.manual-item button { padding: 2px 8px; font-size: 12px; }
.manual-empty { color: var(--muted); font-size: 13px; font-style: italic; }