MediaWiki:VisNetwork.css

/* stylesheet for MediaWiki:VisNetwork.js */

.visNetworkGraph {
        width: 100%;
        height: 600px;
        /*border: 1px solid lightgray;*/
      }
      
.custom-menu {
    display: none;
    z-index: 1000;
    position: absolute;
    overflow: hidden;
    border: 1px solid #CCC;
    white-space: nowrap;
    font-family: sans-serif;
    background: #FFF;
    color: #333;
    border-radius: 5px;
}

.custom-menu li {
    padding: 8px 12px;
    cursor: pointer;
}

.custom-menu li:hover {
    background-color: #DEF;
}      

#operation {
  font-size: 28px;
}

#node-popUp {
  display: none;
  position: absolute;
  top: 350px;
  left: 170px;
  z-index: 299;
  width: 250px;
  height: 120px;
  background-color: #f9f9f9;
  border-style: solid;
  border-width: 3px;
  border-color: #5394ed;
  padding: 10px;
  text-align: center;
}

#edge-popUp {
  display: none;
  position: absolute;
  top: 350px;
  left: 170px;
  z-index: 299;
  width: 250px;
  height: 90px;
  background-color: #f9f9f9;
  border-style: solid;
  border-width: 3px;
  border-color: #5394ed;
  padding: 10px;
  text-align: center;
}