body
{
    font-family: 'Segoe UI', sans-serif;
}

tr:nth-child(even)
{
    background-color: lightgrey
}

.sortorder:after 
{
  content: '\25b2'; 
}

.sortorder.reverse:after 
{
  content: '\25bc';  
}

span.expansionHandle
{
    display: inline-block;
    color: gray;
    transform: rotate(90deg);
    margin-right: 4px;
}

span.expansionHandle.expanded
{
    transform: rotate(180deg);
}

span.expansionHandle:after
{
    content: '\25b2';
}

span.gruppenNummer
{
    display: inline-block;
    min-width: 30px;
    text-align: right;
}