.sl-overview{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px 20px;margin:0 0 20px;color:var(--muted);font-size:13px}
.sl-overview p{margin:0;color:var(--ink);font-size:16px}
.sl-overview strong{font-size:24px;font-variant-numeric:tabular-nums}
.sl-browser{padding:24px;margin-bottom:16px}
.sl-browser-title{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px 16px;margin-bottom:20px}
.sl-browser-title h2{margin:0;font-size:18px;line-height:1.4}
.sl-browser-title p{margin:0;color:var(--muted);font-size:13px}
.sl-categories{display:flex;gap:8px;overflow:auto;padding:0 0 16px;margin-bottom:16px;border-bottom:1px solid var(--line)}
.sl-categories a{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 14px;border-radius:var(--r-sm);background:var(--tonal);color:var(--muted);font-size:13px;font-weight:600;text-decoration:none;white-space:nowrap}
.sl-categories a:hover{background:var(--pri-s);color:var(--pri-t)}
.sl-categories a.on{background:var(--pri);color:#fff}
.sl-categories a span{font-variant-numeric:tabular-nums;font-size:12px;opacity:.8}
.sl-filters{display:flex;align-items:end;flex-wrap:wrap;gap:12px}
.sl-more-filters{display:contents}
.sl-more-toggle{display:none}
.sl-filters label{display:grid;gap:6px;flex:1 1 136px;min-width:136px;color:var(--muted);font-size:13px}
.sl-filters .sl-search{flex:2 1 230px;min-width:200px}
.sl-filters select,.sl-filters input{width:100%;min-height:44px;border:1px solid var(--line2);background:var(--panel);color:var(--ink);border-radius:var(--r-xs);padding:8px 12px;font:inherit}
.sl-filters .rowlink{margin:0 0 1px}
.sl-summary{display:flex;align-items:baseline;justify-content:space-between;gap:8px 16px;flex-wrap:wrap;padding:8px 2px 20px;color:var(--muted);font-size:13px}
.sl-summary div{display:flex;align-items:baseline;gap:12px}
.sl-summary strong{color:var(--ink);font-size:16px}
.sl-summary small{color:var(--faint);font-size:12px}
.sl-group{margin:0 0 28px}
.sl-group-head{display:flex;align-items:baseline;gap:12px;margin:0 0 12px}
.sl-group-head h3{font-size:16px;margin:0;color:var(--ink)}
.sl-group-head span{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.sl-lessons{list-style:none;margin:0;padding:0}
.sl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.sl-card{display:flex;flex-direction:column;min-width:0;overflow:hidden;border:1px solid var(--line2);border-radius:var(--r-md);background:var(--panel)}
.sl-card:hover{border-color:var(--pri-m)}
.sl-card-link{display:flex;flex:1;flex-direction:column;min-width:0;text-decoration:none;color:var(--ink)}
.sl-card-link:hover .sl-card-title,.sl-card-link:hover .sl-card-open{color:var(--pri-t)}
.sl-cover{position:relative;display:grid;place-items:center;width:100%;aspect-ratio:16/9;overflow:hidden;background:var(--tonal)}
.sl-cover img{display:block;position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:var(--panel);opacity:0}
.sl-cover img.loaded{opacity:1}
.sl-cover-empty{padding:16px;color:var(--faint);font-size:13px;text-align:center}
.sl-card-body{display:grid;align-content:start;gap:8px;padding:16px 16px 14px;min-width:0}
.sl-card-path{color:var(--muted);font-size:12px;overflow-wrap:anywhere}
.sl-card-title{color:var(--ink);font-size:16px;font-weight:600;line-height:1.5;overflow-wrap:anywhere}
.sl-card-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--faint);font-size:12px;font-variant-numeric:tabular-nums}
.sl-card-open{color:var(--pri-t);font-weight:600;white-space:nowrap}
.sl-card-resources{display:flex;align-content:start;flex-wrap:wrap;gap:4px 12px;min-height:50px;padding:10px 16px;border-top:1px solid var(--line)}
.sl-resource{font-size:12px;color:var(--ok);white-space:nowrap}
.sl-resource[data-state="pending"]{color:var(--amber-t)}
.sl-resource[data-state="broken"]{color:var(--bad)}
.sl-resource[data-state="none"]{color:var(--faint)}
.sl-pages{display:flex;align-items:center;justify-content:center;gap:16px;margin:4px 0 32px;color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}
.sl-pages [aria-disabled="true"]{opacity:.4;pointer-events:none}
.sl-lesson-heading{display:grid;justify-items:start;gap:4px;margin:0 0 20px}
.sl-lesson-heading h2{margin:8px 0 0;font-size:24px;line-height:1.35;overflow-wrap:anywhere}
.sl-lesson-heading>p{margin:0;color:var(--muted);font-size:13px}
.sl-workspace{display:grid;grid-template-columns:224px minmax(0,1fr);gap:16px;align-items:start;min-width:0}
.sl-material-panel{position:sticky;top:12px;padding:16px;border-radius:var(--r-md);background:var(--panel);min-width:0}
.sl-material-panel h3{margin:0 0 12px;color:var(--muted);font-size:13px}
.sl-tabs{display:grid;gap:4px}
.sl-tabs a{display:flex;align-items:center;min-height:48px;padding:8px 12px;border-radius:var(--r-sm);color:var(--muted);font-size:14px;text-decoration:none;overflow-wrap:anywhere}
.sl-tabs a:hover{background:var(--soft);color:var(--ink)}
.sl-tabs a.on{background:var(--pri-s);color:var(--pri-t);font-weight:600}
.sl-tabs a.sl-pending{color:var(--faint)}
.sl-reader{min-width:0}
.sl-stage{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line2);border-radius:var(--r-md);overflow:hidden}
.sl-stage-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:12px 16px;background:var(--soft)}
.sl-stage-bar>span{font-weight:600;overflow-wrap:anywhere}
.sl-stage-bar>div{display:flex;align-items:center;flex-wrap:wrap;gap:8px}
.sl-stage iframe{display:block;border:0;width:100%;height:72vh;min-height:460px;background:var(--panel)}
.sl-native-video{display:block;width:100%;max-height:72vh;background:var(--dk-0)}
.sl-video-parts{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 12px}
.sl-cache-error{color:var(--bad)!important;font-size:13px;line-height:1.6}
.sl-frame-status,.sl-frame-note{padding:9px 16px;margin:0;color:var(--muted);font-size:12px;line-height:1.7}
.sl-frame-status{border-bottom:1px solid var(--line)}
.sl-frame-note{border-top:1px solid var(--line)}
.sl-stage:fullscreen{border:0;border-radius:0;width:100%;height:100%;background:var(--panel)}
.sl-stage:fullscreen iframe{flex:1;min-height:0;height:auto}
.sl-stage:fullscreen video{flex:1;max-height:none;min-height:0}
.sl-import-actions{display:flex;justify-content:end;gap:10px;margin-top:22px}
.sl-card-link:focus-visible,.sl-categories a:focus-visible,.sl-tabs a:focus-visible{outline:3px solid var(--focus);outline-offset:-3px}
@media(max-width:1100px){.sl-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.sl-workspace{grid-template-columns:190px minmax(0,1fr)}}
@media(max-width:700px){.sl-overview{margin-bottom:12px}.sl-overview>span,.sl-browser-title p,.sl-summary small{display:none}.sl-browser{padding:12px}.sl-browser-title{margin-bottom:12px}.sl-categories{padding-bottom:8px;margin-bottom:8px}.sl-filters{gap:8px}.sl-more-filters{display:none}.sl-more-filters.open{display:flex;flex-wrap:wrap;gap:8px;width:100%}.sl-more-toggle{display:inline-flex}.sl-grid{grid-template-columns:1fr}.sl-workspace{grid-template-columns:minmax(0,1fr)}.sl-material-panel{position:static;padding:12px}.sl-material-panel h3{margin:0 0 8px}.sl-tabs{display:flex;overflow:auto;gap:8px}.sl-tabs a{flex:none;white-space:nowrap;min-height:44px}.sl-stage-bar>div{width:100%}.sl-stage iframe{height:58vh;min-height:340px}.sl-filters .sl-search{flex-basis:100%}.sl-filters label{min-width:calc(50% - 8px)}}
@media(max-width:430px){.sl-filters label{min-width:100%}.sl-filters .btn{flex:1}.sl-categories{margin-right:-16px;padding-right:16px}.sl-pages{gap:8px}.sl-pages .btn{padding:0 10px}}