header {
    background-color: darkcyan;
    color: white;
    padding: 20px;
    text-align: center;
    font-size: 2rem;
    margin: 0px;

}
body{
    background-color: darkgoldenrod;
    margin: 0;
}
.pizza{
    width: 250px;
    height: 200px;
    float: left;
}
.top-center {
    text-align: center;
}
.bottom-center{
    position: absolute;
    bottom: 0%;
    font-size: 15px;
    float: left;
}
#header-img {
    float: right;
    height: 50px;
}
.containerpizza{width: 33%;
    height: 600px;
    background-color: green;
    margin: 0px auto;
    box-sizing: content-box;
    position: absolute;
    left: 0%;
    border-bottom: 6px solid black;
    border-top: 6px solid black;

}
.containerpizza2 {
    width: 34%;
    height: 600px;
    background-color: white;
    margin: 0px auto;
    box-sizing: content-box;
    position: absolute;
    left: 33%;
    border-bottom: 6px solid black;
    border-top: 6px solid black;
}
.containerpizza3{width: 33%;
    height: 600px;
    background-color: red;
    position: absolute;
    left: 67%;
    margin: 0px auto;
    box-sizing: content-box;
    margin-left: 0px;
    border-bottom: 6px solid black;
    border-top: 6px solid black;

}
.mafia{height: 450px;
    width: 100%;
    float: right;
}
.tijden{font-size: 30px;
    text-align: center;
    color: white;
    
}

#knop {
    margin-left: -130px;
}