html, body{
    margin:0;
    font-family:sans-serif;
}
main{
    margin:10px;
}

main > header{
    font-size: 2em;
    font-weight:bold;
    padding: 10px 20px;
    background-color: darkmagenta;
    color: floralwhite;
}

nav{
    margin:10px;
}

nav a{
    display:block;
    margin:10px;
    padding:10px;
    text-align:center;
    border-radius: 5px;
    border: darkgray 1px solid;
    box-shadow: 5px 3px 3px darkgray;
    color:black;
    text-decoration:none;
    font-size:1.5em;
    user-select: none;
}
nav a:hover{
    background-color: lightgray;
}

nav a:active, nav a:focus{
    background-color: darkgray;
}