body{font-family:Arial;margin:0;background:#f4f6f8}
header{background:#0b3d2e;color:white;padding:15px}
nav{max-width:1200px;margin:auto;display:flex;justify-content:space-between;align-items:center}
nav a{color:white;margin:0 12px;text-decoration:none;font-weight:bold}
.hero{position:relative;height:420px;overflow:hidden}
.hero img{width:100%;height:420px;object-fit:cover;position:absolute;animation:slide 18s infinite}
.hero img:nth-child(2){animation-delay:6s}
.hero img:nth-child(3){animation-delay:12s}
@keyframes slide{
0%{opacity:0}
5%{opacity:1}
30%{opacity:1}
35%{opacity:0}
100%{opacity:0}
}
.hero-text{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:white;text-align:center}
.container{max-width:1100px;margin:auto;padding:40px 20px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.card{background:white;border-radius:10px;padding:18px;box-shadow:0 4px 14px rgba(0,0,0,.1)}
.card img{width:100%;border-radius:8px}
footer{background:#0b3d2e;color:white;text-align:center;padding:25px;margin-top:40px}
.whatsapp{position:fixed;bottom:20px;right:20px;background:#25D366;color:white;padding:14px 18px;border-radius:30px;text-decoration:none;font-weight:bold}