style.css

html,
body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #333;
  color: #555;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

#page-wrapper {
  width: 875px;
  margin: 3rem auto;
  padding: 1.5rem;
  background: #FFF;
  border-top: 5px solid #69c773;
  box-shadow: 0 2px 10px rgba(0,0,0,0.8);
}

#synth-pad {
  float: left;
  width: 500px;
  height: 500px;
  border-radius: 3px;
  background: #1E1E1E url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAIUlEQVQYV2P8+vWrJAMRgBGkkJub+zkhtaMK8YYQ0cEDABxGJwNr5yClAAAAAElFTkSuQmCC);
}

#synth-pad:hover {
  cursor: crosshair;
}

#info {
  margin-left: 500px;
  padding-left: 2rem;
  padding-top: 1rem;
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
}

h1 {
  font-weight: normal;
}

p {
  line-height: 1.8rem;
}

.clearfix {
  *zoom: 1;
}

.clearfix:before,
.clearfix:after {
  display: table;
  line-height: 0;
  content: "";
}

.clearfix:after {
  clear: both;
}