:root {
  --bg: #eef2f5;
  --surface: #fff;
  --text: #15202b;
  --muted: #52606d;
  --border: #cbd2d9;
  --primary: #0f5c6e;
  --primary-text: #fff;
  --danger: #a4161a;
  --ok: #1b6b3a;
  --focus: #f2a900;
  font-family: 'Segoe UI', system-ui, -apple-system, Arial, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.5; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.test-banner { background: #fff4ce; color: #5c4400; text-align: center; font-size: .85rem; padding: .4rem 1rem; }
.top { display: flex; gap: .9rem; align-items: center; max-width: 460px; margin: 1.5rem auto .75rem; padding: 0 1rem; }
.mark { width: 48px; height: 48px; border-radius: 12px; background: var(--primary); color: var(--primary-text); display: grid; place-items: center; font-weight: 700; }
.title { font-size: 1.35rem; font-weight: 700; }
.subtitle { color: var(--muted); font-size: .9rem; }
.panel { max-width: 460px; margin: 0 auto 2rem; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 1.5rem; }
h1 { font-size: 1.25rem; margin: 0 0 .75rem; }
p { margin: 0 0 1rem; }
.muted { color: var(--muted); }
label { display: block; font-weight: 600; margin-bottom: .3rem; }
input[type=text], input[type=password] { width: 100%; padding: .6rem .7rem; border: 1px solid var(--border); border-radius: 6px; font: inherit; margin-bottom: 1rem; }
.btn { display: inline-block; width: 100%; padding: .7rem 1rem; border-radius: 6px; border: 1px solid var(--primary); background: var(--primary); color: var(--primary-text); font: inherit; font-weight: 600; cursor: pointer; text-align: center; text-decoration: none; }
.btn.secondary { background: transparent; color: var(--primary); }
.btn.danger { border-color: var(--danger); background: transparent; color: var(--danger); }
.stack > * + * { margin-top: .6rem; }
.error { background: #fdecec; border: 1px solid var(--danger); border-radius: 6px; padding: .7rem .9rem; margin-bottom: 1rem; }
.ok { background: #e7f4ec; border: 1px solid var(--ok); border-radius: 6px; padding: .7rem .9rem; margin-bottom: 1rem; }
.number { font-size: 3rem; font-weight: 700; letter-spacing: .1em; text-align: center; margin: .5rem 0 1rem; }
.qr { display: flex; justify-content: center; margin: .5rem 0 1rem; }
.qr svg { width: 220px; height: 220px; }
.waiting { display: flex; align-items: center; gap: .6rem; justify-content: center; color: var(--muted); }
.spinner { width: 18px; height: 18px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }
dl { display: grid; grid-template-columns: max-content 1fr; gap: .35rem 1rem; margin: 0 0 1.25rem; }
dt { color: var(--muted); }
dd { margin: 0; }
details { margin-top: 1rem; font-size: .9rem; }
code { background: #f1f3f5; padding: .1rem .3rem; border-radius: 4px; word-break: break-all; }