body{margin:0;font-family:Arial,sans-serif;background:#111;color:#eee;line-height:1.6}
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;background:linear-gradient(135deg,#111,#333)}
h1{font-size:4rem;margin:.2em}
nav a{color:white;text-decoration:none;margin:0 15px}
section{max-width:1000px;margin:auto;padding:80px 20px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.card{background:#1d1d1d;padding:40px;border-radius:12px;text-align:center}
footer{text-align:center;padding:30px;border-top:1px solid #333}