style.css

html {
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
  background: #ccc;
  height: 100%;
  font-family: Georgia, serif;
  font-size: 13px;
  -webkit-user-select: none;
}

aside {
  background: #f0f0f0;
  padding: 0 20px;
  height: 100%;
  width: 150px;
  float: left;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

label {
  color: #000;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
}

input {
  margin: 5px 0 10px;
  width: 140px;
  display: block;
}

input[type=checkbox] {
  margin: 5px 5px 10px 0;
  width: auto;
  display: inline-block;
}

select {
  margin: 5px 0 10px;
  width: 142px;
  display: block;
}

button {
  font-family: Georgia, serif;
  font-size: 16px;
  margin: 5px 0 10px;
  width: 142px;
  display: block;
}

section {
  padding-left: 200px;
}

h2 {
  margin: 0;
  padding: 10px;
  font-size: 32px;
  text-align: center;
}

canvas {
  margin: 10px auto;
  background: #111;
  display: block;
}