/* Default CSS */

html,body{height:100%;margin:0;background:#f4f4f4;font-family:sans-serif;}
.pdf-container{
display:flex;justify-content:center;align-items:center;
width:100%;height:100%;padding:1rem;box-sizing:border-box;}
.pdf-container iframe{
max-width:100%;max-height:100%;aspect-ratio:4/3;
width:100%;height:auto;border:1px solid #ccc;background:#fff;
opacity:0;transition:opacity .3s ease-in-out;}
.pdf-container iframe[src]{opacity:1;}</style>