h1, h2, h3, h5 {
    text-align: center;
    clear: both
    }
h4 {
    text-align: left;
    clear: both
    }
p {
    text-align: justify
    }
p.center {
    text-align: center
    }
p.pos_right {
    text-align: right
    }
body {
    margin-left: 10%;
    margin-right: 10%
    }