:root{color-scheme:light;--bg:#f3f5f8;--panel:#fff;--ink:#141a24;--muted:#5f6b7d;--line:#dde2ea;--accent:#1f4fd1;--accent-ink:#fff;--crit:#c0322b;--f-body:"Archivo","Helvetica Neue",Arial,sans-serif}
@media (prefers-color-scheme:dark){:root{color-scheme:dark;--bg:#0e1219;--panel:#161b25;--ink:#e8ecf3;--muted:#95a1b4;--line:#2a3240;--accent:#6f93ff;--accent-ink:#0b1020;--crit:#ff7a70}}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px;background:var(--bg);color:var(--ink);font:14px/1.45 var(--f-body)}
.card{width:100%;max-width:380px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:24px;box-shadow:0 20px 60px rgba(0,0,0,.12)}
.brand{display:flex;align-items:baseline;gap:10px;margin-bottom:18px}
.brand b{font-weight:800;font-size:18px;letter-spacing:.02em}
.brand span{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.12em}
h1{font-size:22px;font-weight:700;margin:0 0 16px}
form{display:flex;flex-direction:column;gap:14px}
label.f{display:flex;flex-direction:column;gap:4px;font-size:11.5px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
input{font:14px var(--f-body);color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:9px 10px;min-width:0;text-transform:none;letter-spacing:0;font-weight:400}
input:focus-visible,.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn{font:600 13px var(--f-body);border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);padding:10px 12px;border-radius:6px;cursor:pointer}
.btn:disabled{opacity:.45;cursor:not-allowed}
.err{color:var(--crit);font-size:13px;font-weight:600;min-height:18px}