body{font-family:Arial,sans-serif;background:#0f172a;color:white;margin:0}
nav{display:flex;justify-content:space-between;padding:15px 30px;background:#111827}
header{text-align:center;padding:80px 20px}
section{padding:40px 20px;max-width:1200px;margin:auto}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:15px}
.card{background:#1e293b;padding:20px;border-radius:12px}
.heroimg{max-width:350px;margin:10px;border-radius:10px;background:white}
button{padding:10px}