html,body{
    width: 100%;
    height: 100%;
    margin:0;
    padding:0;

    font-family: "JetBrains Mono Light";
    background: linear-gradient(to right bottom,antiquewhite,85%,white);
}

header, article{
    text-align: center;
}

main{
    position:relative;
}

aside{
    position:absolute;
    left:10px;
    top:0;
    width:180px;
    height:300px;

    box-shadow:1px 2px 5px 2px #CDCCCC;
}

nav{
    width:100%;
}

a:link{
    color:blue;
}
a:visited{
    color:grey;
}
a:hover{
    color:red;
}
a:active{
    color:gray;
}