.sort th
{
    cursor: default;
    user-select: none;
}

.relevant > span
{
    opacity: 0;
}


.ascending > span
{
    opacity: 1;
}

.ascending > span + span
{
    opacity: 0;
}


.descending > span
{
    opacity: 0;
}

.descending > span + span
{
    opacity: 1;
}