.page-center {
	width:1200px;
}

h2 {
    text-align: center;
    margin-bottom: 0.5em;
}

.option-line {
    margin-left: 10px;
    margin-bottom: 5px;
}

#distance-input {
    vertical-align: middle;
}

canvas {
    width: 512px;
    height: 512px;
    display: block;
    margin : 10px auto;
    padding: 0;
    border-radius: 3px;
    box-shadow: 2px 2px 8px #888888;
}