html,body{height:100%;margin:0;padding:0}.container{flex-direction:column;height:100vh;display:flex;overflow:hidden}.top-row{background:#ccc;flex-shrink:0;justify-content:center;align-items:center;height:30px;display:flex}.bottom-row{flex:1;min-height:0;overflow:hidden}.bottom-row iframe{border:none;width:100%;height:100%;display:block}