table.extremes th {
    border-bottom: 2px solid #ddd;
    font-weight: 400;
    padding: 8px 0;
    text-align: left;
}
table.extremes th.extremesParam {
    width: 50%;
}
table.extremes td {
    border-top: 1px solid #ddd;
    padding: 8px 0;
    vertical-align: middle;
}