*{box-sizing:border-box}body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#0f1d33;background:#f6f8fc}
header{display:flex;justify-content:space-between;align-items:center;padding:18px 6vw;background:#0b2a5b}header a{color:#fff;text-decoration:none;margin-left:22px}
.logo{font-weight:800;font-size:22px;margin-left:0!important}.btn{background:#20c997;padding:8px 16px;border-radius:6px}main{padding:48px 6vw;min-height:60vh}
.hero h1{font-size:44px;margin:0 0 12px}.card{background:#fff;border-radius:12px;padding:28px;box-shadow:0 2px 12px #0001;max-width:440px}
input{width:100%;padding:10px;margin:6px 0 14px;border:1px solid #c9d3e3;border-radius:6px}button{background:#0b2a5b;color:#fff;border:0;padding:11px 20px;border-radius:6px;cursor:pointer}
.err{color:#b42318}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}footer{padding:24px 6vw;color:#5b6b85;font-size:13px}
code,pre{background:#eef2f8;padding:2px 6px;border-radius:4px}