body {
    margin-left: 20%;
    margin-right: 20%;
    text-align: justify
    }
h1 {
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em
    }
h2 {
    text-align: center;
    letter-spacing: 0.04em
    }
h3 {
    text-align: center;
    letter-spacing: 0.04em
    }
p {
    text-indent: 1em;
    margin-top: 0.25em;
    margin-bottom: 0.25em
    }
div.fig {
    display: block;
    margin: 0 auto;
    text-align: center;
    margin-top: 1em;
    margin-bottom: 1em
    }
a:link {
    color: blue;
    text-decoration: none
    }
a:visited {
    color: blue;
    text-decoration: none
    }
a:hover {
    color: red
    }