html{box-sizing:border-box;height:100%}*,*:before,*.after{box-sizing:inherit}body{height:100%;margin:0}#root{height:100%}.App{height:100%;display:flex;flex-direction:column}header{flex-shrink:0}#content{flex-grow:1;overflow:auto}footer{display:flex;flex-shrink:0}.clearer{clear:both}