table.r-responsive-table {
    border: 1px solid #ccc;
    border-collapse: collapse;
    margin: 0;
    padding: 0;
    width: 100%;
    table-layout: fixed;
}

table.r-responsive-table tr {
    border: 1px solid #ddd;
    padding: 0.35em;
}
table.r-responsive-table th,
table.r-responsive-table td {
    padding: 0.625em;
    text-align: center;
}
table.r-responsive-table th {
    font-size: 0.85em;
}
table.r-responsive-table .tdBefore {
    display: none;
}