*{
margin:0;
padding:0;
box-sizing:border-box;
font-family:'Poppins',sans-serif;
}

body{

background:#f4f7fb;
color:#333;
line-height:1.6;

}

.container{

width:90%;
max-width:1200px;
margin:auto;

}

header{

background:#071c33;
padding:20px 0;
position:sticky;
top:0;
z-index:999;

}

.nav{

display:flex;
justify-content:space-between;
align-items:center;

}

.logo{

color:#fff;
font-size:28px;
font-weight:700;

}

nav a{

color:#fff;
text-decoration:none;
margin-left:25px;
transition:.3s;

}

nav a:hover{

color:#32c5ff;

}

.hero{

height:90vh;

background:url("https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=1600&q=80") center center/cover;

position:relative;
display:flex;
align-items:center;
justify-content:center;

}

.overlay{

position:absolute;
width:100%;
height:100%;
background:rgba(0,25,50,.75);

}

.hero-content{

position:relative;
z-index:2;
text-align:center;
color:white;

}

.hero h1{

font-size:56px;
margin-bottom:20px;

}

.hero p{

max-width:800px;
margin:auto;
font-size:22px;
margin-bottom:35px;

}

.btn{

display:inline-block;
padding:15px 40px;
background:#1ea5ff;
color:white;
text-decoration:none;
border-radius:40px;
font-weight:600;
transition:.3s;

}

.btn:hover{

background:#0079d3;

}

.section{

padding:80px 0;

}

.section h2{

text-align:center;
margin-bottom:40px;
font-size:38px;
color:#0d3c68;

}

.cards{

display:grid;
grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
gap:30px;

}

.card{

background:white;
padding:35px;
border-radius:15px;
box-shadow:0 8px 25px rgba(0,0,0,.08);
transition:.3s;

}

.card:hover{

transform:translateY(-8px);

}

.card h3{

margin-bottom:15px;
color:#1269a3;

}

.dark{

background:#0b2039;
color:white;
text-align:center;

}

.dark h2{

color:white;

}

.dark p{

max-width:900px;
margin:auto;

}

.contact{

background:#1269a3;
color:white;
padding:80px 0;
text-align:center;

}

.contact h3{

margin:30px 0;
font-size:30px;

}

footer{

background:#06101d;
color:white;
text-align:center;
padding:25px;

}

hr{

margin:40px auto;
border:none;
border-top:1px solid #ddd;
width:80%;

}

@media(max-width:768px){

.hero h1{

font-size:36px;

}

.hero p{

font-size:18px;

}

nav{

display:none;

}

}