:root{color-scheme:light dark;--bg:#f7f7f5;--fg:#1d1d1b;--muted:#5c5c57;--panel:#fff;--border:#d6d6d0;--accent:#1f5f8b;--accent-fg:#fff;--err:#8a1c12}
@media (prefers-color-scheme:dark){:root{--bg:#161615;--fg:#ececea;--muted:#a5a59f;--panel:#20201e;--border:#3a3a37;--accent:#6fb1e0;--accent-fg:#0d1b25;--err:#f6b8b1}}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:flex;align-items:flex-start;justify-content:center;background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;line-height:1.5;padding:1rem}
.box{width:min(92vw,26rem);margin-top:12vh;background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:1.5rem}
h1{margin:0 0 .5rem;font-size:1.6rem}
.muted{color:var(--muted);margin:0 0 1rem}
.err{color:var(--err);font-weight:600;margin:0 0 1rem}
label{display:block;font-weight:600;margin:0 0 .3rem}
input{width:100%;padding:.55rem;font:inherit;color:inherit;background:transparent;border:1px solid var(--border);border-radius:4px}
button{margin-top:1rem;padding:.55rem 1.1rem;font:inherit;font-weight:600;color:var(--accent-fg);background:var(--accent);border:0;border-radius:4px;cursor:pointer}