body {
    margin: 0;
}

.navbar ul{ 
    list-style-type: none;
    background-color: rgb(114, 177, 240);
    padding: 0%;
    margin: 0%;
    overflow: hidden;
}

.navbar a {
    color: white;
    text-decoration: none;
    padding: 15px;
    display: block;
    text-align: center;
}

.navbar a:hover {
    background-color: rgb(171, 205, 239);
}

.navbar li {
    float: left;
}

header {
    background-color: lightslategrey;
    text-align: center; 
    color: azure;
    padding: 100px;
    font-family: 'Helvetica', 'Arial', sans-serif;
    font-size: 32px;
}

.nul {
    text-align: center;
    font-family: 'Helvetica', 'Arial', sans-serif;
    padding: 20px;
    font-size: 20px;
    margin: 10px;
    float: left;
}

.eerste {
    width: 46%;
    min-width: 360px;
    float: left;
    padding: 10px; 
    font-family: 'Helvetica', 'Arial', sans-serif;
    font-size: 14px;
    margin: 10px;
    border-top: 2px;
    border-top-style: inset;
    border-top-color: rgb(114, 177, 240);
}

.kop1 {
    text-align: center;
} 

.tweede {
    width: 46%;
    min-width: 360px;
    float: left; 
    padding: 10px;
    font-family: 'Helvetica', 'Arial', sans-serif;
    font-size: 14px;
    margin: 10px;
    border-top: 2px;
    border-top-style: inset;
    border-top-color: rgb(114, 177, 240);
}

.kop2 {
    text-align: center;
} 

.aanbodintroductie  {
    text-align: left;
    font-family: 'Helvetica', 'Arial', sans-serif;
    padding: 30px;
    font-size: 14px;
    margin: 10px;
    float: left;
    border-top: 2px;
    border-top-style: inset;
    border-top-color: rgb(114, 177, 240);
}

footer  {
    background-color: rgb(114, 177, 240);
    width: 100%;
    height: 50px;
    float: left;
    text-align: center;
}