.epub{height:100vh}*{background-color:#121212;color:#fff}hr{height:3px;border:none;background:linear-gradient(to right,#121212 20%,#aeaeae 50%,#aeaeae 60%,#121212 80%)}footer{text-align:center;padding:10px}.epub-selector{display:flex;justify-content:center;margin:20px 0}.epub-selector button{background-color:#222;color:#fff;border:2px solid #333;padding:10px 20px;border-radius:4px;cursor:pointer;box-shadow:2px 2px 2px #000;font-size:1rem}.epub-selector button:hover{background-color:#333;color:#fff}@media (max-width: 768px){.epub-selector{flex-direction:column;align-items:center}.epub-selector button{width:100%;padding:10px}}#root{background-color:#121212;background:#121212;padding-top:0;padding-bottom:0;border-color:#121212}