:root { color-scheme: light dark; --fg: #111; --bg: #fff; --muted: #666; --line: #ddd; --accent: #111; --accent-fg: #fff; --warn: #8a5300; --err: #b00020; }
@media (prefers-color-scheme: dark) { :root { --fg: #eee; --bg: #121212; --muted: #aaa; --line: #333; --accent: #eee; --accent-fg: #111; --warn: #f0b35a; --err: #ff6b81; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 -apple-system, "Segoe UI", Helvetica, Arial, sans-serif; }
main { max-width: 420px; margin: 8vh auto; padding: 0 20px; }
.brand { font-weight: 700; letter-spacing: .02em; margin: 0 0 24px; }
h1 { font-size: 1.5rem; margin: 0 0 16px; }
h2 { font-size: 1.1rem; margin: 28px 0 8px; }
label { display: block; margin: 16px 0 6px; font-weight: 600; }
input { width: 100%; padding: 10px 12px; font: inherit; color: inherit; background: transparent; border: 1px solid var(--line); border-radius: 6px; }
button, .button { display: inline-block; width: 100%; margin-top: 12px; padding: 10px 16px; font: inherit; font-weight: 600; text-align: center; text-decoration: none;
  color: var(--fg); background: transparent; border: 1px solid var(--line); border-radius: 6px; cursor: pointer; }
button.primary, .button { color: var(--accent-fg); background: var(--accent); border-color: var(--accent); }
button.danger { color: #fff; background: var(--err); border-color: var(--err); }
button.link { width: auto; border: 0; padding: 0; color: var(--muted); font-weight: 400; text-decoration: underline; }
button:disabled { opacity: .6; cursor: wait; }
.muted { color: var(--muted); font-size: .9rem; }
.error { color: var(--err); }
.warning { color: var(--warn); font-weight: 600; }
.or { text-align: center; color: var(--muted); margin: 20px 0 0; }
.codes { columns: 2; font-family: ui-monospace, Menlo, monospace; }
.details { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; }
.details dt { color: var(--muted); }
.details dd { margin: 0; }
.qr { background: #fff; padding: 8px; border-radius: 6px; }
code { font-family: ui-monospace, Menlo, monospace; word-break: break-all; }
a { color: inherit; }