body{font-family:system-ui,sans-serif;max-width:900px;margin:40px auto;padding:0 20px;line-height:1.6;background:#f8f9fb;color:#222}
header,footer{text-align:center;padding:20px}
.card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 8px rgba(0,0,0,.08);margin:20px 0}
a{color:#0a66cc;text-decoration:none}a:hover{text-decoration:underline}
nav a{margin:0 10px}
h1,h2{color:#174a8b}