body {font-family: Arial; margin:0;}
nav {display:flex; justify-content:space-between; padding:15px; background:#0a2540; color:white;}
nav a {color:white; margin-left:15px; text-decoration:none;}
.hero {
  background: url('https://images.unsplash.com/photo-1586528116311-ad8dd3c8310d') center/cover no-repeat;
  height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.overlay {
  background: rgba(0,0,0,0.5);
  padding: 40px;
  color: white;
}
.btn {background:orange; padding:10px 20px; color:white; text-decoration:none; border:none;}
section {padding:40px;}
.grid {display:flex; gap:20px;}
.grid div {background:#f4f4f4; padding:20px;}
.cta {background:#eee; text-align:center;}
footer {text-align:center; padding:20px;}