.course-links{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 16px}
.course-links button{min-height:44px}
.course-links button[aria-pressed=true]{border-color:#56765d;background:#e9efe8}
.course-workspace{display:grid;grid-template-columns:minmax(215px,280px) minmax(0,1fr);gap:0;padding:0;overflow:hidden}
.course-directory{min-width:0;padding:20px;background:#f7f8f6;border-right:1px solid #e3e7e1}
.course-directory h2,.course-reader h2{margin:0 0 14px;line-height:1.4;overflow-wrap:anywhere}
.course-directory label{display:block;margin:0 0 12px}
.course-directory select,.course-directory input{width:100%;min-width:0}
#course-list{max-height:min(58vh,650px);overflow:auto;overscroll-behavior:contain;margin-top:12px}
.course-lesson{width:100%;display:block;text-align:left;border:0;border-bottom:1px solid #e4e9e3;padding:10px 8px;background:none;min-height:44px;color:#252e27;overflow-wrap:anywhere}
.course-lesson:hover,.course-lesson[aria-current=true]{background:#e8efe7}
.course-lesson small{display:block;color:#546455;margin-top:3px}
.course-reader{min-width:0;padding:clamp(18px,3vw,38px);overflow-wrap:anywhere;scroll-margin-top:16px}
.course-source{font-size:13px;color:#546455}
.course-prose{max-width:76ch;line-height:1.8}
.course-prose pre{font:inherit;white-space:pre-wrap;overflow-wrap:anywhere}
.course-prose .table-wrap,.course-practice .table-wrap{max-width:100%;overflow:auto}
.course-permissions{margin-top:8px;border:1px solid #e0e6df;border-radius:8px;padding:10px}
.course-permissions summary{cursor:pointer;padding:8px 0;min-height:44px}
.course-permissions label{display:flex;align-items:flex-start;gap:10px;min-height:44px;padding:8px 4px;overflow-wrap:anywhere}
.course-permissions input[type=checkbox]{width:auto;min-width:18px;margin-top:3px;flex:none}
@media(max-width:720px){
  .course-workspace{grid-template-columns:minmax(0,1fr)}
  .course-directory{border-right:0;border-bottom:1px solid #e3e7e1}
  #course-list{max-height:220px}
}
.course-progress-title{display:flex;justify-content:space-between;gap:12px;font-size:13px;color:#405348}
#course-progress{margin:0 0 16px}
#course-progress progress{width:100%;height:8px;accent-color:#557660;display:block;margin:8px 0 12px}
.course-continue{width:100%;min-height:44px}
.course-diagram{margin:0 0 18px;padding:16px 18px;background:#f2f5ef;border:1px solid #dbe5d9;border-radius:12px;color:#294535}
.course-diagram figcaption{font-weight:650;margin-bottom:10px}
.course-diagram ol{display:flex;flex-wrap:wrap;gap:8px 19px;padding:0;margin:0;list-style:none}
.course-diagram li{position:relative;background:#fff;padding:6px 9px;border-radius:6px;font-size:13px}
.course-diagram li:not(:last-child)::after{position:absolute;left:calc(100% + 3px);content:'→';color:#526956}
.course-diagram .course-relations{gap:8px}
.course-diagram .course-relations li::after{display:none}
.course-prose mark{background:#fff0bc;color:inherit;padding:1px 2px;border-radius:3px;box-decoration-break:clone}
.course-finish{margin-top:24px}
.course-finish button{min-height:44px}
@media(max-width:480px){.course-diagram{padding:12px}.course-diagram li{font-size:12px}}

@media(max-width:720px){.course-reader{scroll-margin-top:72px}}
.course-reading-head h2{font-size:clamp(22px,3vw,30px);margin-bottom:18px}
.course-review-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:0 0 18px}
.course-review-grid:empty{display:none}
.course-review{padding:14px 16px;border:1px solid currentColor;border-radius:12px}
.course-review h3{margin:0 0 8px;font-size:15px}
.course-review ul{margin:0;padding-left:19px}
.course-review li+li{margin-top:6px}
.course-memorise,.course-prose mark.course-memorise{color:#782c2b;background:#fbe9e7}
.course-read,.course-prose mark.course-read{color:#23553b;background:#e5f1e6}
.course-chapter,.course-visual{margin:8px 0;border:1px solid #dfe4dc;border-radius:10px;background:#fff}
.course-chapter summary,.course-visual summary{padding:10px 14px;min-height:44px;cursor:pointer;font-weight:600;color:#31463a}
.course-chapter[open] summary{border-bottom:1px solid #e4e9e3}
.course-chapter>p,.course-chapter>h4,.course-chapter>.table-wrap,.course-chapter>div,.course-visual>figure{margin:12px 14px}
.course-prose{max-width:none}
.course-chapter>p{max-width:72ch}
@media(max-width:720px){.course-review-grid{grid-template-columns:1fr}.course-reader{padding:16px}}