#app img{margin:0 auto;width:100%;height:100vh;max-width:100%;-o-object-fit:contain;object-fit:contain;z-index:-9999;cursor:pointer}
#controls{position:relative;bottom:12px;left:12px}
#controls .btn{padding:.25rem .5rem;font-size:.875rem;background:#333;color:#fff;border:0 none;cursor:pointer}
#controls .btn:hover{box-shadow: 0 0 3px 2px #fff;}
#check{color:#19ce60;display:none}