* {
    box-sizing: border-box;
  }
  
  body {
    font-family: Arial, sans-serif;
    margin: 0;
    line-height: 1.6;
  }
  
#h2 {
  color: #2783f3;
  border-bottom: 2px #2783f3;
}

.header {
  background-color: slateblue;
  padding: 80px;
  background-size: auto;
  color: #ffffff;
  text-align: center;
}

::selection {
  color: #fff;
  background: #2783f3;
}

/* Navigatiebalk */

  ul{
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
  }
        
  li {
    float: left;
  }
        
  li a{
    display: block;
    color: white;
    text-align: center;
    padding: 21px 43px;
    text-decoration: none;
    width: 14,2857142857%;
  }
        
  li a:hover:not(#lid-worden-button) {
    background-color: #2783f3;
  }
        
  #lid-worden-button {
    background-color: #0b00a3;
    color: #ffffff;
    overflow: hidden;
  }
      
  li img {
    float: left;
    overflow: auto;
    height: 67px;
    width: 67px;
  }
  
  #navbalk-img,
  div .list-items {
      margin-bottom: 0rem;
  }

  .grid-container {  
    display: grid;
    flex-wrap: wrap;
    grid-template-columns: 30% 70%;
  }
  
  .side {
    width: auto;
    background-color: #f1f1f1;
    padding: 20px;
  }
  
  .main {   
    width: 70%;
    background-color: white;
    padding: 20px;
  }
  
  @media screen and (max-width: 700px) {
    .row {   
      flex-direction: column;
    }
  }
  
  @media screen and (max-width: 400px) {
    .navbar a {
      float: none;
      width:100%;
    }
  }

  .fotogebouw{
    width: 100%;
  }
 
  .form-div input[type="email"]{ 
    display: block;
    width: 100%;
    padding: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    outline-color: #2783f3;
  }

  .form-div input[type="submit"]{
    display: block;
    width: 100%;
    padding: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    outline-color: #2783f3;
}

.subkop {
  font-weight: bold;
}