body{
margin:0;
font-family:'Poppins', sans-serif;
background:#f5f7fa;
}

.header{
background:#000;
color:#fff;
text-align:center;
padding:15px;
}

.hero{
background:url('https://images.unsplash.com/photo-1507525428034-b723cf961d3e') center/cover no-repeat;
height:90vh;
position:relative;
color:#fff;
}

.overlay{
background:rgba(0,0,0,0.5);
height:100%;
display:flex;
flex-direction:column;
justify-content:center;
align-items:center;
text-align:center;
padding:20px;
}

.overlay h1{
font-size:48px;
margin-bottom:10px;
}

.overlay p{
font-size:20px;
}

.btn{
background:#00c6ff;
color:#fff;
padding:14px 30px;
text-decoration:none;
border-radius:30px;
margin-top:20px;
display:inline-block;
font-weight:500;
}

.section{
padding:70px 20px;
text-align:center;
}

.section.dark{
background:#0a2540;
color:#fff;
}

.grid{
display:flex;
gap:30px;
justify-content:center;
flex-wrap:wrap;
}

.card{
background:#fff;
border-radius:15px;
overflow:hidden;
box-shadow:0 10px 25px rgba(0,0,0,0.15);
width:300px;
transition:0.3s;
}

.card:hover{
transform:translateY(-10px);
}

.card img{
width:100%;
height:200px;
object-fit:cover;
}

.card h3{
padding:15px;
}

.footer{
background:#000;
color:#fff;
text-align:center;
padding:25px;
}

@media(max-width:768px){
.overlay h1{
font-size:32px;
}
}