body{
font-family:Arial;
background:#f4f6f9;
margin:0;
}

.header{
background:#1e2a38;
color:white;
padding:15px;
}

.header a{
color:white;
margin-left:20px;
text-decoration:none;
}

.container{
display:grid;
grid-template-columns:repeat(4,1fr);
gap:20px;
padding:30px;
}

.box{
background:white;
padding:20px;
border-radius:8px;
box-shadow:0 4px 10px rgba(0,0,0,0.1);
}