#original-text,
#new-text {
    width:500px;
    height:120px;
    }
#diff-results {
    border:1px solid #CCCCCC;
    padding:3px;
    background-color:#eeeeee;
    }
#diff-results del {
    background-color:#ffaaaa;
    }
#diff-results ins {
    background-color:#feff99;
    }