body{
background:#ffe600;
font-family:Verdana;
}

.container{
width:900px;
margin:auto;
background:white;
border:4px solid #0033a0;
}

header{
text-align:center;
}

nav{
background:#0033a0;
padding:10px;
text-align:center;
}

nav a{
color:white;
margin:10px;
text-decoration:none;
font-weight:bold;
}

.content{
display:flex;
}

aside{
width:250px;
background:#f2f2f2;
padding:15px;
}

main{
flex:1;
padding:20px;
}

footer{
background:#0033a0;
color:white;
text-align:center;
padding:10px;
}