body{margin:0;font-family:sans-serif;background:#0b0b0b;color:#fff}header{display:flex;justify-content:space-between;align-items:center;background:#000;padding:10px 30px;flex-wrap:wrap}.logo{height:60px}nav ul{list-style:none;display:flex;gap:15px;padding:0;margin:10px 0 0 0}nav a{text-decoration:none;color:#ffd700;font-weight:bold}.section{display:none;opacity:0;transition:opacity 0.5s}.section.visible{display:block;opacity:1}.hero{background-size:cover;background-position:center;padding:100px 20px;text-align:center;color:#ffd700}.hero h1{font-size:3rem}.hero .subtitle{font-size:1.5rem;font-weight:300}.presence-img{max-width:100%;margin-bottom:20px}form{display:flex;flex-direction:column;max-width:500px}input,textarea{margin-bottom:10px;padding:10px;background:#222;border:none;color:#fff;border-radius:5px}button{background:#ffd700;color:#000;padding:10px;border:none;border-radius:5px;font-weight:bold}