body {
  background-color: lightcyan;
}

h1 {
  text-align: center;
  border: 1px solid;
  box-shadow: 3px 3px 0px 0px #313131;
  background-color: white;
  margin-bottom: 0;
  padding: 10px;
}

h2 {
  margin-top: 0;
}

h3 {
  margin-bottom: 0;
}

.container {
  width: 1260px;
}

aside {
  float: left;
  width: 200px;
  margin-top: 20px;
}

.container > .etch {
  float: left;
  background-color: red;
  box-shadow: 7px 7px 0px 0 black;
  height: 600px;
  padding: 110px;
  margin: 20px 0 0 20px;
  border-radius: 10px;
  position: relative;
}

canvas#sketch {
  background-color: #e6e6e6;
  box-shadow: inset 1px 1px 3px 0 black;
  border-radius: 10px;
  padding: 2px;
}

.knob {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: white;
  position: absolute;
  bottom: 10px;
}

.knob.left {
  left: 10px;
}

.knob.right {
  right: 10px;
}

aside > section {
  border: 1px solid;
  box-shadow: 3px 3px 0px 0px #313131;
  margin-bottom: 10px;
  padding: 10px;
  background-color: white;
}

section.controls .control-list {
  display: grid;
  grid-template-columns: 50% 50%;
  grid-gap: 10px;
}

section.controls .control.double {
  grid-column: 1 / 3;
}
section.controls .key {
  display: inline-block;
  border: 1px solid #555;
  border-radius: 3px;
  background-color: #eee;
  font-family: monospace;
  line-height: 30px;
  min-width: 30px;
  text-align: center;
  padding: 0 5px;
  box-shadow: 2px 2px 0 0 #000;
}

section.controls .action {
  margin-left: 7px;
  font-size: 19px;
}

section.options input {
  display: none;
}

section.options label {
  display: block;
}

section.options .speed .speed-option,
section.options .color .color-option {
  margin: 7px;
  padding: 5px;
  box-shadow: 2px 2px 0 0 #000;
  border: 1px solid;
}

section.options .speed .speed-option.selected,
section.options .color .color-option.selected {
 box-shadow: none;
  margin: 9px 5px 5px 9px;
  background-color: #eee;
}