.product {
    max-width: 300px;
    margin: 20px 40px 20px 40px;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
    float: left;
    background-color: white;
}

body {
    background-color: antiquewhite;
}


.prijs {
    color: gray;
    font-size: 22px;
}

.product button {
    border: none;
    padding: 12px;
    color: black;
    background-color: #e5f8fc;
    cursor: pointer;
    text-align: center;
    width: 100%;
    font-size: 16px;
}

.product button:hover {
    opacity: 0.5;
    background-color: ;
}