@import url('https://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css');html{position:relative;height:100%}body{margin-top:50px;margin-bottom:50px;height:100%}.footer{position:absolute;bottom:0;width:100%;height:60px;background-color:#f5f5f5}#article,#articleBody{margin-left:auto;margin-right:auto}.node circle{fill:#fff;stroke:steelblue;stroke-width:1.5px}.node{font:10px sans-serif}.link{fill:none;stroke:#ccc;stroke-width:1.5px}