body{margin:0;font-family:Arial;background:#222;color:#fff;
background-image:linear-gradient(45deg,#2d2d2d 25%,#242424 25%,#242424 50%,#2d2d2d 50%,#2d2d2d 75%,#242424 75%);
background-size:20px 20px}
header{padding:30px;text-align:center;background:#111}
h1,h2{color:#fff;text-shadow:2px 2px 4px #000}
nav{display:flex;gap:20px;justify-content:center;padding:15px;background:#b30000}
nav a{color:#fff;text-decoration:none;font-weight:bold}
section{max-width:1200px;margin:auto;padding:30px}
.hero{text-align:center}
.wa{display:inline-block;padding:12px 18px;background:#25D366;color:#fff;text-decoration:none;border-radius:6px}
iframe{background:#fff}