body{margin:0;font-family:Arial;background:#f4f8ff;color:#003366}
header.top{display:flex;justify-content:space-between;align-items:center;background:#005599;color:#fff;padding:15px}
header .logo{font-size:22px;font-weight:bold}
header nav a{color:#fff;margin:0 10px;text-decoration:none}
.hero{padding:60px;text-align:center;background:#e6f2ff}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px;padding:30px}
.cards div{background:#fff;padding:20px;border-radius:8px;text-align:center}
.content{padding:40px}
footer{background:#003366;color:#fff;text-align:center;padding:15px}
.whatsapp{position:fixed;right:20px;bottom:20px;background:#25D366;color:#fff;padding:12px 18px;border-radius:50px;text-decoration:none}
input,textarea,button{width:100%;max-width:400px;margin:8px 0;padding:10px}