style.css

.node circle {
    fill: #fff;
    stroke: steelblue;
    stroke-width: 3px;
}

.node text {
    font: 12px sans-serif;
}

.link {
    fill: none;
    stroke: #ccc;
    stroke-width: 2px;
}

.canvas {
    border: 1px solid #d3d3d3;
    background-color: #f1f1f1;
}

body {
  font-family: Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  font-weight: 300;
  background-color: #fdfdfd;
}

#wrap {
  width:800px;
  margin-left: auto;
  margin-right: auto;
}

a {
  color: #0074d9; /* From http://clrs.cc */
  text-decoration: none;
}

a:hover, a:focus {
  text-decoration: underline;
}

path {
    stroke: steelblue;
    stroke-width: 2;
    fill: none;
}

.axis path,
.axis line {
    fill: none;
    stroke: grey;
    stroke-width: 1;
    shape-rendering: crispEdges;
}

form {
    display: table;
}

select {
    display: table-cell;
}

p.params {
    display: none;
}

p.monitor {
	display: table-row;
}

label {
    display: table-cell;
    padding-left: 10px;
    padding-right: 10px;
}

input.param {
    display: table-cell;
    width: 60px;
}

input.display {
    width: 80px;
}

/* from http://tobiasahlin.com/spinkit/ */
.spinner {
	margin: 100px auto 0;
	width: 70px;
	text-align: center;
}

.spinner > div {
	width: 18px;
	height: 18px;
	background-color: #333;

	border-radius: 100%;
	display: inline-block;
	-webkit-animation: sk-bouncedelay 1.4s infinite ease-in-out both;
	animation: sk-bouncedelay 1.4s infinite ease-in-out both;
}

.spinner .bounce1 {
	-webkit-animation-delay: -0.32s;
	animation-delay: -0.32s;
}

.spinner .bounce2 {
	-webkit-animation-delay: -0.16s;
	animation-delay: -0.16s;
}

@-webkit-keyframes sk-bouncedelay {
	0%, 80%, 100% { -webkit-transform: scale(0) }
	40% { -webkit-transform: scale(1.0) }
}

@keyframes sk-bouncedelay {
	0%, 80%, 100% {
		-webkit-transform: scale(0);
		transform: scale(0);
	} 40% {
		-webkit-transform: scale(1.0);
		transform: scale(1.0);
	}
}