h1,
h2,
h3,
h4,
h5,
h6 {
    background-color: rgb(30, 100, 200);
    color: white
}

h1:hover,
h2:hover,
h3:hover,
h4:hover,
h5:hover,
h6:hover {
    background-color: rgb(139, 190, 232);
}

header {
    margin-left: 40px;
    margin-right: 40px;
}

mark {
    background-color: rgb(255, 210, 0);
}

table img {
    height: 150px;
}

header img {
    height: 100px;
    float: right;
    margin: auto;
    clear: both;
}

figcaption {
    text-align: center;
}

.tableimg {
    text-align: center;
    padding: 10px;
}

table,
table th,
table td {
    border: 4px double;
    border-collapse: collapse;
}

table {
    margin: 0 auto;
}

iframe {
    width: 100%;
    border-radius: 15px;
}

main footer {
    font-size: small;
    margin-bottom: 20px;
}

#footerb {
    margin-top: 20px;
    font-weight: bold;
    font-variant: small-caps;

}

ul {
    list-style-type: square;
}

fieldset {
    border: 2px solid rgb(255, 210, 0);
    padding: 20px;
}

fieldset legend {
    color: rgb(30, 100, 200);
}

.knop {
    margin: 0 20%;
}

#verzend {
    height: 45px;
    padding: 5px;
}

textarea {
    width: 100%;
}

form.border-primary {
    border-color: rgb(255, 210, 0) !important;
    border: 2px;

}