:root {
   --bg: #f5f6f8; --card: #ffffff; --ink: #1b1f24; --muted: #5d6673; --line: #dfe3e8;
   --accent: #0b5cad; --accent-ink: #ffffff; --danger: #b42318; --ok: #1a7f37;
   color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
   :root { --bg: #111418; --card: #1a1e24; --ink: #e8ebef; --muted: #9aa4b1; --line: #2c323a; --accent: #5aa2f0; --accent-ink: #0b1220; --danger: #f97066; --ok: #4ac26b; }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
.shell { max-width: 440px; margin: 0 auto; padding: 32px 16px; }
.brand { display: flex; align-items: baseline; gap: 8px; margin-bottom: 16px; }
.brand-mark { font-weight: 600; letter-spacing: .08em; color: var(--ink); text-decoration: none; }
.brand-name { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 24px; }
.foot { margin-top: 16px; color: var(--muted); font-size: 13px; text-align: center; }
h1 { font-size: 22px; font-weight: 500; margin: 0 0 16px; }
h2 { font-size: 18px; font-weight: 500; margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.stack { display: flex; flex-direction: column; gap: 8px; margin: 0 0 12px; }
.inline { display: inline-flex; gap: 6px; }
.btn { display: inline-block; width: 100%; padding: 10px 14px; border: 1px solid var(--accent); border-radius: 8px; background: var(--accent); color: var(--accent-ink); font: inherit; text-align: center; text-decoration: none; cursor: pointer; }
.btn.secondary { background: transparent; color: var(--accent); }
.btn.danger { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn.small { width: auto; padding: 4px 10px; font-size: 14px; }
.alert { padding: 10px 12px; border-radius: 8px; margin-bottom: 12px; border: 1px solid; }
.alert.error, .error { color: var(--danger); border-color: var(--danger); }
.alert.ok { color: var(--ok); border-color: var(--ok); }
label { font-size: 14px; color: var(--muted); }
input[type=text], input:not([type]) { padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); font: inherit; }
.tabs { display: flex; gap: 16px; margin-bottom: 16px; border-bottom: 1px solid var(--line); }
.tabs a { padding: 6px 0; color: var(--muted); text-decoration: none; }
.tabs a.active { color: var(--ink); border-bottom: 2px solid var(--accent); }
.rows { list-style: none; padding: 0; margin: 0 0 16px; }
.rows li { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.links { padding-left: 18px; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }
.chip { display: inline-block; padding: 1px 8px; margin: 0 4px 4px 0; border: 1px solid var(--line); border-radius: 999px; font-size: 13px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 16px 0; }
.qr { display: block; width: 200px; height: 200px; background: #fff; padding: 8px; border-radius: 8px; }
.codes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 4px 16px; padding: 0; list-style: none; }
input[type=password] { padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); font: inherit; }