body{margin:0;font-family:Arial,sans-serif;background:#f4f4f4}
nav{background:#111;color:#fff;padding:15px 20px;display:flex;justify-content:space-between}
nav a,.btn{color:#fff;text-decoration:none}
.hero{background:#1f2937;color:#fff;padding:80px 20px;text-align:center}
.btn{background:#25D366;padding:12px 20px;border-radius:6px}
section{max-width:1100px;margin:auto;padding:40px 20px}
.plans{display:flex;flex-wrap:wrap;gap:20px;justify-content:center}
.card{background:#fff;padding:20px;border-radius:10px;box-shadow:0 2px 8px rgba(0,0,0,.15);width:220px;text-align:center}
.price{font-size:30px;font-weight:bold}
footer{background:#111;color:#fff;text-align:center;padding:20px}