.responsive-container{height:0;padding-bottom:56.25%;padding-top:25px;position:relative}.responsive-container iframe{height:100%;left:0;position:absolute;top:0;width:100%}.chapters-container ul{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-bottom:20px}.chapter-link{align-items:center;background:#fff;border:1px solid #dcdddf;border-radius:999px;display:flex;flex-direction:row;font-size:12px;height:28px;justify-content:center;padding:4px 8px;transition:background-color .3s}.chapter-link:hover{background-color:#f0f0f1}.chapter-link.active,.chapter-link:active{background-color:#e8eafc;border-color:#adb5f5;color:#3143e5}.current-chapter{background-color:red;color:#fff}