form {
    text-align: center;
}

#alien {
    width: 100px;
}
.ruimteschip {
    width: 150px;
}
#knop1 {
    margin-left: 5px;
}
#knop2 {
    margin-left: 140px;
}
#knop3 {
    margin-left: 140px;
}
#ww {
    margin-top: 15px;
    width: 150px;
}
#value-slider {
    font-size: 15px;
}
#zon {
    margin-right: auto;
    margin-left: auto;
    width: 150px;
}

select, input, ::placeholder{
    padding: 10px;
    background-color: #272727;
    color: white;
    border-radius: 8px;
}