table.sortierbar {
    margin-left:auto;
    margin-right:auto;
}


th {font-weight: bold;
    font-size:small;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    min-width: 50px;
    text-align: center;
    
}
td {
    border-style: solid;
    border-left: 1px;
text-align: center;
    border-bottom: 0px;
    border-top: 0px;
}

.sortsymbol {
    color:red;
    display:block;
    
}

table.sortierbar tr:nth-child(even) {

  background-color: #ffe37f;

}