render.css

* {
  box-sizing: border-box;
}
.column {
  float: left;
  width: 50%;
  padding: 10px;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: normal;
}

p {
  font-size: large;
}

button{
  font-family: monospace;
}

body {
  font-family: monospace;
}

.overlay {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 1;
  top: 0;
  right: 0;
  background-color: rgb(200,200,200);
  background-color: rgba(200,200,200, 0.6);
  overflow-x: hidden;
  transition: 0.5s;
}

.overlay-content {
  position: relative;
  top: 25%;
  width: 40%;
  text-align: center;
  margin-top: 30px;
}

.overlay .closebtn {
  position: absolute;
  top: 20px;
  right: 45px;
  font-size: 60px;
}

#myCanvas {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: #ccc;
}

.row:after {
  content: "";
  display: table;
  clear: both;
}

.left {
  width: 60%;
}

.right {
  width: 40%;
}

.hidden{
  display: none;
}

.toggleButton{
  margin: 3px;
}

input{
  width: 9%;
}

.slidecontainer {
  width: 100%;
}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 25px;
  background: #d3d3d3;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
}

.slider:hover {
  opacity: 1;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 25px;
  height: 25px;
  background: #462686;
  cursor: pointer;
}

.slider::-moz-range-thumb {
  width: 25px;
  height: 25px;
  background: #04AA6D;
  cursor: pointer;
}