header {
    height: 10vh;
    box-shadow: 0 5px 10px lightgray;
    text-align: center;
    padding: 5px;
}

.centered {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 5vw;
}

.toevoeg {
    position: absolute;
    top: 20px;
    right: 5px;
}