body {
  color: black;
  background: lightblue;
  text-align: center;
}

body.voorwaarde {
   text-align: left;
}

div.centreer {
  text-align: center;
}

a:link {
    color: green;
    text-decoration: none;
}

a:visited {
  color: green;
  text-decoration: none;
}

a:hover {
  color: yellow; 
  text-decoration: none;
}

div.header {
  position: absolute;
  width: 80%;
  left: 20%;
  height: 15%;
  padding-top: 1%;
  top: 1%;
  text-align: center;  
}

div.header a:hover {
  font-size: medium;
}

div.title {
  color: yellow;
  font-weight: bold;
}

div.normal {
  color: blue;
} 

div.content {
  position: absolute;
  width: 80%;
  left: 20%;
  height: 65%;
  top: 19%;
}

div.main {
  font-size: large;
}

div.teller {
  color: white;
}

div.menu {
  width: 16%;
  text-align: center;
  float: left;
/*  margin: 1em; */
}

div.menu a:first-child {
  margin-top: 0;
}

div.menu a:hover {
  border-top-color: black;
  border-left-color: black;
  border-bottom-color: white;
  border-right-color: white;
}

div.menu a:visited {
  color: black;
}

.hidden {
  display: none;
}

div.footer {
  color: yellow;
  padding-top: 3%;
  font-size: large;
}

div.bottom {
  color: yellow;
  font-weight: bold;
  position: absolute;
  width: 80%;
  left: 20%;
  bottom: 8%; 
}

div.bottom:hover {
  position: absolute;
  color: black;
}

h2 {
  margin-bottom: 0%;
  font-size: large;
  color: white;
}

img.correctbutton {
  padding-bottom: 2.4em;
}

#navigatie {
 font-family: verdana, Helvetica, Arial, sans-serif;
 font-size: 14px;
 width: 12em;
 border-right: 1px solid #666;
 padding: 0;
 margin-bottom: 1em;
 background-color: lightblue;
 color: #333;
}

#navigatie ul {
 list-style: none;
 margin: 0;
 padding: 0;
}

#navigatie ul li {
 margin: 0;
 border-top: 1px solid #003;
}

#navigatie ul li a {
 display: block;
 padding: 2px 2px 2px 4px;
 border-left: 1px solid #369;
 border-right: 1px solid #69c;
 border-bottom: 1px solid #369;
 background-color: silver;
 color: #fff;
 text-decoration: none;
 width: 100%;
}

html>body #navigatie ul li a {
 width: auto;
}

#navigatie ul li a:hover {
 border-left: 1px solid #036;
 border-right: 1px solid #69c;
 border-bottom: 1px solid #369;
 background-color: #69f;
 color: black;
}