virtpool/templates/assets/css/Bootstrap-4---Table-Fixed-Header.css

body {
  background: #74ebd5;
  background: -webkit-linear-gradient(to right, #74ebd5, #ACB6E5);
  background: linear-gradient(to right, #74ebd5, #ACB6E5);
}

.tableFixHead{
  overflow-y: auto;
  height: 400px;
}

.tableFixHead thead th{
  position: sticky;
  top: 0;
}