.custom-btn :hover{background-color:#999;color:#fff;outline:none;padding:10px 16px;cursor:pointer}.custom-btn :active{background-color:#666;color:#fff;outline:none;padding:10px 16px;cursor:pointer}.custom-btn{border:1px;outline:none;padding:10px 16px;background-color:#f1f1f1;cursor:pointer;margin:0 1rem 1rem 0}.btn:hover{background-color:#999;color:#fff;outline:none;padding:10px 16px;cursor:pointer}.btn:active{background-color:#666;color:#fff;outline:none;padding:10px 16px;cursor:pointer}.parent{width:100%;height:100%;left:0;position:absolute;top:0;border:solid 1px #000}iframe{width:100%;height:100%;border:0px}.parent>button{right:10px;top:35px;float:right;opacity:.3;position:absolute;transition:.5s}.parent>button{opacity:1}