:root{color-scheme:light dark;--bg:#f4f5f7;--fg:#1b2130;--muted:#5d6678;--card:#fff;--line:#dfe3ea;--accent:#2f5bd3;--accent-fg:#fff;--danger:#c23434;--ok:#1d7a46;--radius:12px}
@media (prefers-color-scheme:dark){:root{--bg:#0f1218;--fg:#e7eaf0;--muted:#9aa3b4;--card:#171b23;--line:#2a313d;--accent:#6f93ff;--accent-fg:#0b1020;--danger:#ff7676;--ok:#5fd39a}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;min-height:100vh;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,sans-serif;display:flex;justify-content:center;align-items:flex-start;padding:max(24px,env(safe-area-inset-top)) 16px 32px}
.panel{width:100%;max-width:400px;margin-top:6vh}.panel.wide{max-width:640px;margin-top:2vh}
.brand{display:flex;align-items:center;gap:8px;font-weight:600;margin-bottom:28px}.brand .muted{font-weight:400}
.logo{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--accent);color:var(--accent-fg);font-weight:700}
h1{font-size:1.5rem;margin:0 0 6px;letter-spacing:-.01em}h2{font-size:1.05rem;margin:0 0 12px}
.muted{color:var(--muted)}.fine{color:var(--muted);font-size:.85rem;margin-top:20px}
.stack{display:flex;flex-direction:column;gap:14px;margin:20px 0 8px}
label{display:flex;flex-direction:column;gap:6px;font-size:.9rem;font-weight:500}
input{font:inherit;font-weight:400;padding:11px 12px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--fg);width:100%}
input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
input.code{letter-spacing:.3em;font-variant-numeric:tabular-nums;font-size:1.2rem;text-align:center}
.btn{display:inline-flex;justify-content:center;align-items:center;gap:6px;font:inherit;font-weight:500;padding:11px 16px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--fg);text-decoration:none;cursor:pointer;min-height:44px}
.btn.primary{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
.btn.danger{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 40%,var(--line))}
.btn.link{border:0;background:none;color:var(--muted);padding:8px 0;min-height:0}.btn.small{padding:6px 10px;min-height:36px;font-size:.85rem}
.row{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}
.alert{padding:10px 12px;border-radius:8px;margin:16px 0;font-size:.92rem}
.alert.error{background:color-mix(in srgb,var(--danger) 12%,transparent);color:var(--danger)}
.alert.ok{background:color-mix(in srgb,var(--ok) 14%,transparent);color:var(--ok)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:16px 0}
dl{display:grid;grid-template-columns:max-content 1fr;gap:6px 16px;margin:0}dt{color:var(--muted)}dd{margin:0;word-break:break-word}
.sessions{list-style:none;padding:0;margin:0 0 14px}.session{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}
.session div{display:flex;flex-direction:column}.session .muted{font-size:.85rem}
.crumbs{margin-bottom:12px}.crumbs a{color:var(--muted);text-decoration:none}
.qr{display:block;background:#fff;padding:8px;border-radius:8px;margin:12px 0}code{word-break:break-all}