body {
  font-family: "Helvetica Neue", helvetica, arial, sans-serif;
  font-size: 14px;
  background-color: #fafafa;
}
canvas {
  background-color: #ffffff;
}
#container {
  width: 1000px;
  margin: 0 auto;
  overflow: hidden;
}
#app {
  float: left;
}
#app canvas {
  margin-top: 30px;
  border: 1px solid #ccc;
}

#history {
  float: right;
  height: 400px;
  width: 130px;
  overflow-y: scroll;
  padding-top: 50px;
}

#history canvas {
  width: 120px;
  height: 60px;
  border: 1px solid #ccc;
}

#history ul { list-style: none; margin: 0; padding: 0 }
#history .selected canvas {
  border-color: blue;
}
#help {
  padding-top: 20px;
  clear: both;
}
#help dl dt {
  float: left;
  clear: left;
  min-width: 60px;
}