main.css

body {
   margin: 0;
   padding: 0;
   background-color: black;
   font-family: 'Press Start 2P';
   font-size: 1em;
}

label {
   display: inline-block;
   width: 200px;
}

input[type='range']{
   width: 180px;
}

input[type='text']{
   width: 45px;
}

textarea {
   width: 500px;
}

h1 {
   font-size: 1.25em;
}


.code {
   position: relative;
}

.code #copy-to-clipboard {
   position: absolute;
   top: 10;
   right: 10;
}

.control {
   display: flex;
   white-space: nowrap;
   padding: .15em;
   align-items: center;
}

.control label {
   margin-right: auto;
}
.control:nth-child(2n) {
   background-color: #2f2f2f;
}

.particle-controls {
   padding: 20px;
   position: absolute;
   left: 20px;
   top: 20px;
   bottom: 20px;
   width: 500px;
   background-color: gray;
   color: white;
   border: none;
   border-radius: 10px;
   overflow-y: scroll;
}