:root {
  --bg: #f3f5f8;
  --card: #ffffff;
  --text: #1c2430;
  --muted: #5f6b7a;
  --primary: #0b5394;
  --primary-text: #ffffff;
  --border: #d8dee6;
  --ok: #1e7d3a;
  --err: #b3261e;
  --code-bg: #f6f8fa;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151b;
    --card: #1b2129;
    --text: #e6ebf1;
    --muted: #9aa6b4;
    --primary: #4a8fd6;
    --border: #2d3540;
    --ok: #5cc27a;
    --err: #f08a80;
    --code-bg: #141920;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  min-height: 100vh;
}
header { background: var(--primary); color: var(--primary-text); padding: 14px 16px; }
header h1 { margin: 0; font-size: 1.15rem; }
main { max-width: 560px; margin: 0 auto; padding: 16px; display: grid; gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
h2 { margin: 0 0 8px; font-size: 1.1rem; }
h3 { margin: 16px 0 6px; font-size: .95rem; color: var(--muted); }

.viewport {
  position: relative; width: 100%; aspect-ratio: 1 / 1;
  background: #000; border-radius: 10px; overflow: hidden;
}
video { width: 100%; height: 100%; object-fit: cover; display: block; }
.frame {
  position: absolute; inset: 15%;
  border: 3px solid rgba(255,255,255,.85); border-radius: 12px;
  box-shadow: 0 0 0 9999px rgba(0,0,0,.35);
  pointer-events: none; display: none;
}
.scanning .frame { display: block; }
.placeholder {
  position: absolute; inset: 0; margin: 0; display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 24px; color: #cfd6df;
}
.scanning .placeholder { display: none; }

.actions { display: flex; gap: 10px; margin-top: 12px; }
.actions button { flex: 1; }
button {
  font: inherit; padding: 12px 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  cursor: pointer;
}
button.primary { background: var(--primary); color: var(--primary-text); border-color: var(--primary); font-weight: 600; }
button:disabled { opacity: .6; }

.manual { margin-top: 12px; }
.manual summary { color: var(--muted); cursor: pointer; }
.manual form { display: flex; gap: 8px; margin-top: 8px; }
.manual input {
  flex: 1; min-width: 0; font: inherit; padding: 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}

.status { margin: 0 0 8px; font-weight: 600; }
.status.ok { color: var(--ok); }
.status.err { color: var(--err); }
.summary { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; margin: 0; }
.summary dt { color: var(--muted); }
.summary dd { margin: 0; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9rem; word-break: break-all; }
pre {
  margin: 0; padding: 12px; background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 8px; overflow-x: auto; white-space: pre-wrap;
}
footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 8px 0 20px; }