body{
font-family: Arial, sans-serif;
margin:0;
background:#f4f6f9;
color:#333;
}

.container{
width:90%;
max-width:1100px;
margin:auto;
}

header{
background:#0a2540;
color:white;
padding:20px 0;
}

.header-flex{
display:flex;
justify-content:space-between;
align-items:center;
}

nav a{
color:white;
margin-left:20px;
text-decoration:none;
font-weight:bold;
}

.hero{
background:#1e3a8a;
color:white;
padding:80px 0;
text-align:center;
}

.btn{
background:#22c55e;
color:white;
padding:12px 25px;
text-decoration:none;
border-radius:6px;
display:inline-block;
margin-top:15px;
}

.section{
padding:60px 0;
}

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

.grid{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
gap:20px;
margin-top:30px;
}

.card{
background:white;
padding:25px;
border-radius:8px;
box-shadow:0 5px 15px rgba(0,0,0,0.1);
}

.section.dark .card{
background:#162d50;
color:white;
}

footer{
text-align:center;
padding:25px;
background:#111;
color:white;
}