html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
}

button {
  font-size: 18px;
  background: rgb(255, 189, 70);
  padding: 10px 20px;
  border: 2px solid #888;
  border-radius: 5px;
  color: rgb(50, 50, 50);
}

button:active {
  background: rgb(255, 164, 0);
}

button:focus {
  outline:0 !important;
}

.inline-code {
  font-family: Consolas, Monaco, 'Andale Mono', monospace;
  color: rgb(155, 27, 27);
}

#main {
  font-size: 16px;
  margin-left: 20px;
}

#explanation {
  margin: 10px 0 30px 0;
  width: 500px;
  text-align: justify;
}

#demos-column {
  float: left;
  width: 200px;
  margin-right: 20px;
  font-size: 20px;
}

#code-column {
  float: left;
  width: 600px;
  margin-right: 20px;
}

#internals-column {
  float: left;
  width: 300px;
}

#code-column-editor {
  font-family: Consolas, Monaco, 'Andale Mono', monospace;
  width: 100%;
  font-size: 16px;
  padding: 10px;
  box-sizing: border-box;
  resize: vertical;
  background-color: #F9F9F9;
}

#code-column-commentary {
  text-align: justify;
  color: #555;
}

#demos-list {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

.demo-choice {
  cursor: pointer;
  color: #617DFF;
}

.demo-choice:hover {
  text-decoration: underline;
  background-color: #eee;
}

.demo-active {
  background-color: #BAEA87 !important;
}

#controls-form {
  margin-bottom: 20px;
}

#square {
  position: absolute;
  width: 30px;
  height: 30px;
  background-color: #FA79B4;
  border: 2px solid #666;
  left: -100px;
  right: -100px;
  pointer-events: none;
}