html {
  scroll-behavior: smooth;
}

.kopregel {
  top: 0px;
  margin: -25px;
  height: 90px;
}

.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: black;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 0;
    
    /* Position the tooltip */
    position: absolute;
    z-index: 1;
    top: 100%;
    left: 50%;
    margin-left: -60px;
    margin-top: -5px;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
}

.kleinefoto {
  width: 120px;
  height: 80px;
  margin-right: 10px;
  margin-bottom: 10px;
}

.ptrTabel {
  max-width: 200px;
}

.etrTabel {
  max-width: 300px;
}

.opvul {
  min-height: 500px;
}

a {
  color: blue;
}

a:hover {
  color : #000000;
  background:yellow;
}