body {
    margin-left: 10%;
    margin-right: 10%
    }
h3 {
    margin-top: 4em
    }
h4 {
    margin-bottom: 2em
    }
a:link {
    color: blue;
    text-decoration: none
    }
link {
    color: blue;
    text-decoration: none
    }
a:visited {
    color: blue;
    text-decoration: none
    }
a:hover {
    color: red
    }