:root{--bg:#f6f7f9;--fg:#1c2430;--muted:#667085;--brand:#1f6f8b;--card:#fff;--line:#dde1e7;--err:#b42318}
@media (prefers-color-scheme:dark){:root{--bg:#12161c;--fg:#e8ecf1;--muted:#9aa4b2;--brand:#5db4d1;--card:#1b212a;--line:#2b3340;--err:#f97066}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif}
.top{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--card);border-bottom:1px solid var(--line)}
.brand{font-weight:700;font-size:1.2rem;color:var(--fg);text-decoration:none}
.brand span{color:var(--brand)}
.logout{display:flex;gap:12px;align-items:center;margin:0}
.logout span{color:var(--muted)}
main{max-width:640px;margin:0 auto;padding:24px 16px}
h1{font-size:1.5rem;margin:0 0 16px}
.muted{color:var(--muted)}
.error{color:var(--err)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;display:grid;gap:12px}
label{display:grid;gap:4px;font-size:.9rem;color:var(--muted)}
input{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg)}
button{font:inherit;padding:10px 16px;border:0;border-radius:8px;background:var(--brand);color:#fff;cursor:pointer}
.logout button{padding:6px 12px}