body, html {
  background-color: #dddddd;
  height: 100%;
  margin: 0px;
  font-family: sans-serif; /* was eerst font-family: Trebuchet MS;*/
  text-align: center;
  }
/*--------------------------------------------------------------------------------------------------------*/
.bg-text {
    background-color: rgb(0,0,0);
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    font-weight: bold;
    border: 3px solid #babac5;
    position: absolute;
    top: 40%;
    left: 13%;
    /*transform: translate(-50%, -50%);*/
    z-index: -0.1;
    width: 70%;
    padding: 30px;
    text-align: center;
    border-radius: 70px;
  }

  /* De onderstaande CSS regels zijn voor de eigenschappen van de achtergrondafbeelding */
  .bg-image {
  background-image: url('katten.jpg');
  filter: blur(0px);
  -webkit-filter: blur(0px);
  height: 100%; 
  background-repeat: repeat;
  background-position: center center;
  background-size: 10%;
  background-attachment: fixed;
}
  /* -----De onderstaande regels zijn slechts voor de opmaak van een tabel---- */
  table, th, td {
      border: 1px solid black;
      border-collapse: collapse;
  }
  th, td {
      padding: 5px;
      text-align: left;
  }
  table#t01 tr:nth-child(even) {
      background-color: #ccc;
  }
  table#t01 tr:nth-child(odd) {
      background-color: #fff;
  }
  table#t01 th {
      background-color: black;
  }
  th {
      color: white;
  }
  table.center {
	    margin-left:auto; 
	    margin-right:auto;
  }
/* ----------------------------------------------------------- */

/* ------- Aangepast standaardmenu vanuit w3schools.com ----- */
  ul {
      list-style-type: none;
      margin: 0;
      padding: 0;
      overflow: hidden;
      background-color: #4f4f5f;    /* Kleur menubalk; oorspronkelijk #333 */
      box-shadow: 0px 4px 8px 0px rgb(0, 0, 0);
  }

  li {
      float: left;
  }

  li a, .dropbtn {
      display: inline-block;
      color: white;
      text-align: center;
      padding: 30px 75px;
      text-decoration: none;
      font-size: 1.3em;
      transition: background-color 0.5s ease;
  }

  li a:hover, .dropdown:hover .dropbtn {
      background-color: #26262c;   /* Kleur mouseover; oorspronkelijk rood */
  }

  li.dropdown {
      display: inline-block;
  }

  .dropdown-content {
      display: none;
      position: absolute;
      background-color: #f9f9f9;
      min-width: 160px;
      box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
      z-index: 1;
  }

  .dropdown-content a {
      color: black;
      padding: 12px 16px;
      text-decoration: none;
      display: block;
      text-align: left;
  }

  .dropdown-content a:hover {background-color: #dddddd} /* Kleur mouseover binnen dropdown lijst; oorspronkelijk #f1f1f1 */

  .dropdown:hover .dropdown-content {
      display: block;
    }
  li a:active, #active{
      background-color: #0000ff; /* Kleur active class in menubalk; oorspronkelijk #4CAF50 */
      color: white;
  }
  /* ---------------------------------------------------------------------------------*/
  /* -------- Opmaak van de hyperlinks -----------------------------------------------*/
  /* unvisited link */
  .hyper:link {
      color: lightblue;
  }

  /* visited link */
  .hyper:visited {
      color: lightblue;
  }

  /* mouse over link */
  .hyper:hover {
      color: darkblue;
  }

  /* selected link */
  .hyper:active {
      color: yellow;
  }