style.css

* {
  margin: 0;
  box-sizing: border-box;
  float: left;
}

p,
label {
  font-family: roboto, sans-serif;
  color: #fff;
}

#canvas {
  background-color: #14213d;
  position: absolute;
  left: 0;
  top: 0;
}

#menu {
  position: absolute;
  left: 0;
  top: 0;

  height: auto;
  max-height: 100vh;
  width: 300px;
  padding: 20px;
  display: block;
  overflow: auto;

  background-color: #23446c;
  z-index: 1;
  border-bottom-right-radius: 15px;
}

#menu.hidden {
  width: auto;
}

#menu.hidden #menu-hide-button {
  margin: 0;
}

#menu.hidden #menu-inputs {
  display: none;
}

#menu input,
div {
  width: 100%;
  float: left;
  clear: right;
  margin-bottom: 15px;
  clear: both;
}

#menu label {
  clear: left;
  margin-bottom: 5px;
}

#menu :last-child {
  margin-bottom: 0;
}

#menu input[type="radio"] {
  clear: left;
  width: auto;
  height: auto;
  margin: 0;
  margin-right: 5px;
}

#menu .radio-label {
  clear: none;
  margin: 0;
}

body {
  overflow: hidden;
  height: 100vh;
}

#menu-hide-button {
  float: right;
  cursor: pointer;
  width: auto;
  height: auto;
}

#menu-hide-button svg {
  height: 20px;
  width: 20px;

  stroke-width: 15px;
  stroke: #fff;
  stroke-linecap: round;
}