html{overflow:hidden}button{position:absolute;top:50px}button:first-of-type{left:10px;bottom:20px;top:auto}button:last-of-type{right:10px;bottom:20px;top:auto}@media screen and (max-width:350px){button:first-of-type{left:5px;font-size:small}button:last-of-type{right:5px;font-size:small}}#container{width:100%;height:100%;overflow:hidden}