ins {
    background-color: #c6ffc6;
    text-decoration: none;
    font-size: medium;
    border-bottom-color: #003399;
}

del {
    background-color: #ffc6c6;
    font-size: medium;
    border-bottom-color: #003399;
}
div br:nth-child(2n) { display: none; }