style.css

/* General formatting */
body {
	padding: 0 10px;
	font: 18px/1.5 -apple-system, BlinkMacSystemFont, "avenir next",avenir, "Segoe UI", "lucida grande", "helvetica neue", helvetica, "Fira Sans",roboto, noto, "Droid Sans", cantarell, oxygen, ubuntu, "franklin gothic medium", "century gothic", "Liberation Sans",
	sans-serif;
}

h1, h2, h3 {
	line-height: 1.2
}

/* Your text should be in a nice narrow column */
.content-column {
	max-width: 650px;
	margin: 40px auto;
}

/* But your visualization should be full-width and full-height */
.vis-holder {
  width: 100%;
  display: flex;
}

.bubblechart-holder {
	flex: 0 0 50%;
  }

.selected {
	opacity: 1 !important;
	stroke: black;
	stroke-width: .5px;
	fill: #ff7575 !important;
}

/* Style for the line path*/
.linePath {
  fill: none;
  stroke: black;
  stroke-width: 1;
}

.network-holder {
flex: 1;
}

.links line {
  stroke: #999;
  stroke-opacity: 0.6;
}

.nodes circle {
  stroke: #fff;
  stroke-width: 0px;
}


.vis-holder2 {
 	width: 100%;
  	display: block;
  	margin: auto;
	max-width: 1000px;
}

.line {
	fill: none;
	stroke-width: 3px;
	display: none;
}

.show {
	display: block;
}

.vis-svg {
  background-color: #f4f1f0;
}

div.tooltip {
    position: absolute;
    text-align: center;
    width: 70px;
    height: 30;
    padding: 2px;
    font: 18px sans-serif;
    background: lightsteelblue;
    border: 0px;
    border-radius: 8px;
    pointer-events: none;
}

div.tooltip2 {
    position: absolute;
    text-align: center;
    width: 100px;
    height: 30;
    padding: 2px;
    font: 18px sans-serif;
    background: lightsteelblue;
    border: 0px;
    border-radius: 8px;
    pointer-events: none;
}

#forkongithub a{
	background:#00F;
	color:#fff;
	text-decoration:none;
	font-family:arial,sans-serif;
	text-align:center;
	font-weight:bold;
	padding:5px 40px;
	font-size:1rem;
	line-height:1.4rem;
	position:relative;
	transition:0.5s;
}
#forkongithub a:hover{
	background:#118;
	color:#fff;
}
#forkongithub a::before,#forkongithub a::after{
	content:"";
	width:100%;
	display:block;
	position:absolute;
	top:1px;
	left:0;
	height:1px;
	background:#fff;
}
#forkongithub a::after{
	bottom:1px;
	top:auto;
}
@media screen and (min-width:1000px){
	#forkongithub{
		position:absolute;
		display:block;
		top:0;
		right:0;
		width:200px;
		overflow:hidden;
		height:200px;
		z-index:9999;
	}
	#forkongithub a{
		width:200px;
		position:absolute;
		top:60px;
		right:-60px;
		transform:rotate(45deg);
		-webkit-transform:rotate(45deg);
		-ms-transform:rotate(45deg);
		-moz-transform:rotate(45deg);
		-o-transform:rotate(45deg);
		box-shadow:4px 4px 10px rgba(0,0,0,0.8);
	}
}