html,body,#root{height:100%;width:100%;padding:0;margin:0}#root{display:flex;flex-direction:column}header{background-color:#ccc;flex-direction:row;display:flex;height:53px}header>div{display:flex;flex:1}header>.btn-logout{display:flex;flex:none;padding:5px;font-size:12px}main{flex:auto}footer{height:25px;background-color:#ccc}