:root{font-family:Inter,system-ui,sans-serif;color:#172033;background:#f4f6f9}*{box-sizing:border-box}body{margin:0}header{display:flex;justify-content:space-between;align-items:center;padding:18px 28px;background:#111827;color:#fff}nav{display:flex;gap:16px;align-items:center}nav a,.link-button{color:#fff;text-decoration:none;background:none;border:0;font:inherit;cursor:pointer}main{max-width:1100px;margin:32px auto;padding:0 20px}section{background:#fff;padding:22px;border-radius:14px;box-shadow:0 5px 20px #0001}.login-card{max-width:420px;margin:80px auto}form{display:grid;gap:14px}label{display:grid;gap:6px;font-weight:600}input{padding:11px;border:1px solid #cbd5e1;border-radius:8px;font:inherit}button{padding:11px 16px;border:0;border-radius:8px;background:#2563eb;color:#fff;font-weight:700;cursor:pointer}.error{margin-bottom:14px;padding:10px;border-radius:8px;color:#991b1b;background:#fee2e2}