:root{--ink:#0e0e0f;--paper:#f5f2ec;--line:#d8d3c8;--muted:#8b8478}
*{box-sizing:border-box}body{margin:0;background:var(--paper);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial;color:var(--ink)}
.auth-shell{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}.auth-dark{background:var(--ink);display:grid;place-items:center;padding:24px}.auth-light{display:grid;place-items:center;padding:20px}
.brand{display:inline-flex;align-items:center;gap:.55em;white-space:nowrap}.brand-logo{height:46px;width:auto;display:inline-block}.brand-text{color:#fff;letter-spacing:.14em;text-transform:uppercase;font-weight:600}
.card{width:min(520px,92vw);background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;display:grid;gap:10px}
h1{font-size:2rem;margin:0}.sub{color:var(--muted);margin:0 0 6px}
input,select,button{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font-size:15px;background:#fff}.row{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.btn-dark{background:var(--ink);color:#fff;border-color:var(--ink)}.link{border:none;background:transparent;text-align:left;padding:2px 0;color:#5f584e;text-decoration:underline}
.msg{min-height:18px;font-size:.85rem}.ok{color:#1b7a36}.err{color:#b42318}
@media (max-width:900px){.auth-shell{grid-template-columns:1fr}.auth-dark{min-height:120px}.brand-logo{height:34px}}