:root{font-family:system-ui,-apple-system,Arial,sans-serif;color:#17263b;background:#f5f7fb}
*{box-sizing:border-box}
body{margin:0;line-height:1.6}
header{background:#163b65;color:white;padding:24px max(20px,calc((100vw - 1050px)/2))}
header a{color:white;text-decoration:none}
.brand{font-size:26px;font-weight:800}
nav{margin-top:8px}
main{max-width:1050px;margin:36px auto;padding:0 20px}
h1{font-size:clamp(28px,4vw,42px);line-height:1.2}
h2{font-size:22px}
.lead{color:#53657b;font-size:18px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-top:25px}
.card{background:white;border:1px solid #e2e8f0;border-radius:16px;padding:24px;box-shadow:0 4px 18px #152b4508}
.card a{color:#164d91;font-weight:700;text-decoration:none}
.card a:hover{text-decoration:underline}
label{display:block;font-weight:650;margin:18px 0 6px}
input{display:block;width:100%;padding:13px;border:1px solid #b7c5d5;border-radius:9px;font-size:17px}
button{margin-top:20px;background:#1761b5;color:white;border:0;border-radius:9px;padding:13px 22px;font-size:16px;cursor:pointer}
button:hover{background:#104a8d}
.result{margin-top:22px;padding:16px;background:#edf5ff;border-radius:10px;font-weight:700;min-height:58px}
footer{text-align:center;color:#65758a;padding:36px 20px}
.note{font-size:14px;color:#607086}
@media(max-width:600px){main{margin:22px auto}.card{padding:18px}}