body {
    margin-left: 5%;
    margin-right: 5%
    }
h1 {
    text-align: center
    }
h2 {
    text-align: center
    }
h3 {
    text-align: center
    }
.indent {
    margin-left: 10%
    }
.indentb {
    margin-left: 15%
    }
.indentc {
    margin-left: 5%
    }