/**/
table.c4 {
    border: 3px dotted gray;
    padding: 2%
    }
table.c3 {
    border: none;
    margin-left: auto;
    margin-right: auto;
    max-width: 30em
    }
a.c2 {
    font-weight: bold
    }
table.c1 {
    border: 1px solid gray;
    padding: 2%;
    text-align: center;
    margin-right: auto;
    margin-left: auto;
    max-width: 40em
    }
/**/