body{margin:0;font-family:Arial,sans-serif;background:#f6f8fb;color:#1d2433}.nav{display:flex;gap:1rem;padding:1rem;background:#111827}.nav a{color:#fff;text-decoration:none}.container{max-width:1000px;margin:1.5rem auto;padding:0 1rem}.grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.card{background:#fff;border-radius:8px;padding:1rem;box-shadow:0 1px 4px #00000014}input,button{display:block;width:100%;margin-bottom:.75rem;padding:.6rem}.error{color:#b91c1c}