index.css

html, body, #draw {
 margin: 0;
 padding: 0;
 width: 100vw;
 height: 100vh;
 overflow: hidden;
}
#controls {
 top: 0;
 right: 0;
 position: absolute;
 box-sizing: border-box;
 background-color: rgba(0,0,0,0.75);
 width: 250px;
}
.inputelem {
  color: #fff;
  font-family: sans-serif;
  text-transform: lowercase;
  font-size: 14px;
  width: 100%;
  border-bottom: 1px solid grey;
  box-sizing: border-box;
}
.inputelem label {
  padding: 0.5em;
  display: inline-block;
}
.inputelem:hover {
  background-color: #000;
}
.inputelem input, .inputelem select {
  float: right;
  margin-top: 0.5em;
}
#pitchdisp, #pitch {
  color: #45a3dc;
  background-color: #666;
  border: none;
  margin-top: 0.4em;
}
#pitchdisp {
  width: 3em;
  padding: 3px;
  height: calc(1.5em - 4px);
}
#pitchdisp:focus {
  background: #555;
  color: #fff;
}
#pitch {
  -webkit-appearance: none; 
  cursor: col-resize;
  height: 1.5em;
}
#pitch::-moz-range-thumb {
  height: 100%;
  width: 5px;
  border-radius: 0px;
  background-color: #45a3dc;
  border: none;
}
#pitch::-webkit-slider-thumb{
  height: 0px;
  width: 0px;
}
#pitch::-webkit-slider-runnable-track {
  width: 100%;
  background: transparent;
  border: none;
}
#pitch::-moz-range-track {
  width: 100%;
  background: transparent;
  border: none;
}
#play {
  width: 100%;
  border: none;
  background-color: black;
  color: white;
  text-transform: lowercase;
  padding: 0;
  margin: 0;
  padding: 0.2em;
  font-size: 16px;
}
#play:hover {
  background-color: #333;
}
#form {
  -webkit-appearance: none;
  -moz-appearance: none;
  border: 0;
  color: #45a3dc;
  padding: 1px;
  background: #666 url("data:image/svg+xml;utf8,%3Csvg%20height='16'%20viewBox='0%200%2048%2048'%20width='16'%20xmlns='http://www.w3.org/2000/svg'%3E%3Cpath%20d='M14.83%2016.42l9.17%209.17%209.17-9.17%202.83%202.83-12%2012-12-12z' stroke='%2345a3dc' fill='%2345a3dc'/%3E%3Cpath%20d='M0-.75h48v48h-48z'%20fill='none'/%3E%3C/svg%3E") no-repeat right;
}