body {
    margin: 2em 7%;
    text-align: justify
    }
h1 {
    text-align: center;
    font-size: large;
    margin-top: 3em;
    margin-bottom: 1.5em
    }
h2 {
    text-align: center;
    font-size: medium;
    font-weight: normal;
    margin-top: 3em;
    margin-bottom: 1.5em
    }
hr.pb {
    border: none;
    border-bottom: 1px solid #ccc
    }
div.centered {
    text-align: center
    }
div.centered table {
    margin: 0 auto;
    text-align: left
    }