:root{font-family:system-ui,-apple-system,Segoe UI,sans-serif;color:#16233a;background:#f4f7fb}*{box-sizing:border-box}body{margin:0}header{background:#12355b;color:#fff;padding:1rem 5%;display:flex;justify-content:space-between;align-items:center}nav{display:flex;align-items:center;gap:1rem}nav a{color:#fff;text-decoration:none}nav form{margin:0}main{max-width:1100px;margin:2rem auto;padding:0 1rem}.card{background:#fff;border:1px solid #dce3ed;border-radius:12px;padding:1.5rem;box-shadow:0 6px 20px #17365d10}.narrow{max-width:440px;margin:5rem auto}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1rem}label{display:block;font-weight:600;margin:1rem 0}input{display:block;width:100%;padding:.75rem;margin-top:.4rem;border:1px solid #aab7c7;border-radius:7px}button{cursor:pointer;border:0;border-radius:7px;padding:.65rem 1rem}.primary{background:#146c94;color:#fff}.alert{background:#ffe6e6;color:#8a1010;padding:.75rem;border-radius:7px}