body{
    font-size: 1.8rem;
    background-color: rgb(0,0,0);
    color:white;
}
.plateContainer{
    display: inline-grid;
    grid-template-columns: 150px 150px;
    grid-template-rows: 150px 150px;
    grid-template-areas: 
    "tl tr"
    "bl br"
    ;
}
.plate{
    background-color: rgba(78, 78, 78, 0.76);
    color: white;
    margin: 5px;
}

.prime{
    grid-area: tl;
}
.fibonacci{
    grid-area: tr;
}
.even{
    grid-area: bl;
}
.square{
    grid-area: br;
}

.correct{
    background-color: rgba(18, 144, 18, 0.879) !important;
}

button{
    padding:1rem !important ;
}
input[type=checkbox]{
    height: 0;
    width: 0;
    visibility: hidden;
  }
  
  label {
    margin: 0 auto;
    cursor: pointer;
    text-indent: -9999px;
    width: 60px;
    height: 30px;
    background: grey;
    display: block;
    border-radius: 100px;
    position: relative;
  }
  
  label:after {
    content: '';
    position: absolute;
    top: 5px;
    left: 5px;
    width: 20px;
    height: 20px;
    background: #fff;
    border-radius: 90px;
    transition: 0.3s;
  }
  
  input:checked + label {
    background: #bada55;
  }
  
  input:checked + label:after {
    left: calc(100% - 5px);
    transform: translateX(-100%);
  }
  
  label:active:after {
    width: 130px;
  }