:root{--bg:#f2f5f5;--card:#fff;--ink:#14252c;--muted:#58696f;--line:#d9e2e3;--accent:#0a6a70;--bad:#ae342b;color-scheme:light}
@media (prefers-color-scheme:dark){:root{--bg:#0e1719;--card:#152124;--ink:#e3eced;--muted:#93a6aa;--line:#2a3b3f;--accent:#4cc1c0;--bad:#f08a80;color-scheme:dark}}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:grid;place-items:center;background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;padding:16px}
main{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px;width:min(380px,100%);display:flex;flex-direction:column;gap:12px}
form{display:flex;flex-direction:column;gap:14px}
h1{margin:0;font-size:1.4rem}
label{display:flex;flex-direction:column;gap:4px;font-size:.85rem;font-weight:600;color:var(--muted)}
input{font:inherit;color:inherit;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:9px 11px}
button{font:inherit;font-weight:600;background:var(--accent);color:#fff;border:0;border-radius:8px;padding:10px;cursor:pointer}
button.link{background:none;color:var(--accent);padding:4px;font-weight:500}
.err{color:var(--bad);margin:0}.muted{color:var(--muted);margin:0}