div.container {
    width: 100%;
    border: 1px solid gray;
}

header, footer {
    padding: 1em;
    color: white;
    background-color:#6699ff;
    clear: left;
    text-align: center;
    
}
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  background-color: #4CAF50;
  color: white;
} 
 
div.figure {
  float: left;
  width: 20%;
  border: thin silver solid;
  margin: 0.5em;
  padding: 0.5em;
}
div.figure p {
  text-align: center;
  font-style: normal;
  font-size: 20px;
 /* <!--  font-size: smaller; --> */
  text-indent: 0;
}
img.scaled {
  width: 100%;
}


div.box {
    float: left;
    background-color: lightgrey;
    width: 20%;
    border: 1px solid green;
    padding: 10px;
    margin: 6px;
    font-size: 24px;
    font-weight: bold;
}

div.info {
  background-color: #eee;
  width: 500px;
  height: 100px;
  border: 1px dotted black;
  overflow: scroll;
}
* {
  box-sizing: border-box;
}

.column {
  float: left;
  width: 25%;
  padding: 5px;
}

/* Clearfix (clear floats) */
.row::after {
  content: "";
  clear: both;
  display: table;
}

/* nieuwe gordijn menu */


.overlay {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  background-color: rgb(1, 0, 7);
  background-color: rgba(1,0,7, 0.9);
  overflow-x: hidden;
  transition: 0.5s;
}

.overlay-content {
  position: relative;
  top: 25%;
  width: 100%;
  text-align: center;
  margin-top: 20px;
}

.overlay a {
  padding: 8px;
  text-decoration: none;
  font-size: 18px;
  color: #f9f9fc;
  display: block;
  transition: 0.3s;
}

.overlay a:hover, .overlay a:focus {
  color: #03fa0b;
}

.overlay .closebtn {
  position: absolute;
  top: 20px;
  right: 45px;
  font-size: 48px;
}

/* einde nieuwe gordijnmenu */