/**/
span.c3 {
    margin-left: 2em
    }
table.c2 {
    text-align: center;
    font-weight: bold;
    font-size: 150%
    }
table.c1 {
    border: 2px black solid;
    margin: auto auto;
    max-width: 50%;
    padding: 1%
    }
/**/