:root{--bg:#f6f5f2;--panel:#fff;--ink:#17151c;--muted:#6b6775;--line:#e4e0ea;--acento:#7c3aed}
@media (prefers-color-scheme:dark){:root{--bg:#121016;--panel:#1c1922;--ink:#f1eef6;--muted:#a39fae;--line:#2e2a36}}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:grid;place-items:center;background:var(--bg);color:var(--ink);font:16px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,sans-serif;padding:16px}
.caja{width:100%;max-width:380px;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 10px 40px rgba(0,0,0,.06)}
.marca{display:flex;gap:12px;align-items:center;margin-bottom:24px}
.marca b{display:block;font-size:18px}.marca span{color:var(--muted);font-size:13px}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:14px}
input{display:block;width:100%;margin-top:6px;padding:12px 14px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink);font-size:16px}
input:focus{outline:2px solid var(--acento);outline-offset:1px}
button{width:100%;padding:13px;border:0;border-radius:10px;background:var(--ink);color:var(--bg);font-weight:600;font-size:16px;cursor:pointer;margin-top:6px}
.error{color:#dc2626;font-size:14px;margin:0 0 10px}