:root {
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --line: #d9d9de;
  --accent: #1f5fbf;
  --danger: #b3261e;
  --note: #fff6d6;
  --error-bg: #fdecea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161618;
    --fg: #ececf0;
    --muted: #a1a1a8;
    --line: #3a3a40;
    --accent: #7aa7f0;
    --danger: #f2a49e;
    --note: #3a3320;
    --error-bg: #3d2220;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.bar { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 600; color: var(--fg); text-decoration: none; margin-right: auto; }
.who { color: var(--muted); }
main { max-width: 720px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.5rem; margin: 8px 0 16px; }
h2 { font-size: 1.15rem; margin: 28px 0 12px; }
a { color: var(--accent); }
.stack { display: flex; flex-direction: column; gap: 12px; max-width: 420px; }
.stack label { display: flex; flex-direction: column; gap: 4px; }
.stack label.check { flex-direction: row; align-items: center; gap: 8px; }
.inline { display: inline-flex; gap: 6px; align-items: center; margin: 0; }
input, select, button { font: inherit; }
input[type=text], input[type=email], input[type=password], select { padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg); }
button, .button { display: inline-block; padding: 8px 14px; min-width: 88px; border: 1px solid var(--accent); border-radius: 6px; background: var(--accent); color: #fff; text-decoration: none; text-align: center; cursor: pointer; }
button.plain { background: none; border: none; color: var(--accent); padding: 0; min-width: 0; }
button.danger { background: none; color: var(--danger); border-color: var(--danger); }
.error { background: var(--error-bg); padding: 8px 12px; border-radius: 6px; }
.notice { background: var(--note); padding: 8px 12px; border-radius: 6px; }
.small { color: var(--muted); font-size: 0.875rem; }
.mark { font-size: 0.75rem; border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; color: var(--muted); }
.card { border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px; margin: 0 0 16px; }
.copy { display: flex; gap: 8px; }
.copy input { flex: 1; min-width: 0; }
.lanes { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.lanes li { display: flex; align-items: center; gap: 12px; }
.lane { display: block; flex: 1; padding: 14px 16px; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; color: var(--fg); font-weight: 600; }
.side { font-size: 0.875rem; }
table { width: 100%; border-collapse: collapse; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; white-space: nowrap; }
.log td { white-space: normal; }
.qr { width: 200px; height: 200px; margin: 8px 0; background: #fff; padding: 0; }
.secret { word-break: break-all; font-size: 1rem; }
.codes { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 1.1rem; }