.classroom-heading{display:flex;justify-content:space-between;align-items:center;gap:16px}.classroom-heading h1{font-size:clamp(26px,4vw,36px);line-height:1.35;overflow-wrap:anywhere;margin:8px 0}.classroom-heading p{margin:8px 0;color:var(--muted)}#classroomStatus{min-height:28px;font-weight:600;color:#843807;overflow-wrap:anywhere}.lecture-catalog{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.lecture-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;display:flex;flex-direction:column;gap:12px;min-width:0}.lecture-card h2{font-size:23px;margin:0;overflow-wrap:anywhere}.lecture-card p{margin:0;color:var(--muted)}.lecture-card .primary,.lecture-card .secondary{margin-top:auto}.lecture-card .tag{align-self:flex-start;background:#fff0e2;color:#843807;font-size:14px;font-weight:700}.classroom-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:24px;align-items:start;margin-top:20px}.classroom-layout>*{min-width:0}.lesson-card,.syllabus{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden}.lesson-body{padding:24px}.lesson-body h2{font-size:24px;overflow-wrap:anywhere}.lesson-body h3{font-size:18px}.lesson-body p{white-space:pre-wrap;overflow-wrap:anywhere}.lecture-player{width:100%;display:block;aspect-ratio:16/9;background:#1c201d;max-height:520px}.player-controls{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:14px 20px;background:#f4f5f2}.player-controls label{display:flex;align-items:center;gap:8px}.player-controls select{font:inherit;font-size:16px;color:var(--ink);background:#fff;border:1px solid #bec3b8;border-radius:8px;min-height:44px;padding:6px 10px}.player-controls p{font-size:14px;margin:0}.lesson-actions{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 0}.lesson-actions>*{flex:1;min-width:120px}.lesson-pager{display:flex;justify-content:space-between;gap:12px;margin-top:16px}.lesson-pager button{flex:1;min-width:0}.syllabus-head{padding:20px 20px 10px}.syllabus-head h2{font-size:20px}.syllabus-head p{font-size:14px;color:var(--muted);margin-bottom:8px}#lectureList{max-height:570px;overflow:auto;overscroll-behavior:contain;padding:8px}.lecture-item{display:block;width:100%;text-align:left;background:#fff;color:var(--ink);border:1px solid transparent;border-radius:12px;padding:14px;margin-bottom:5px;line-height:1.5}.lecture-item[aria-current=true]{background:#fff1e7;border-color:#bd4707}.lecture-item strong,.lecture-item small{display:block;overflow-wrap:anywhere}.lecture-item small{font-size:14px;color:var(--muted);margin:4px 0}.lecture-item strong{font-size:16px}.lecture-item .completed{color:#216041;font-weight:700}.chapter-label{font-size:14px;font-weight:750;padding:14px 12px 6px;margin:0;color:#82370b}.lesson-attachments{display:grid;gap:10px}.lesson-attachments a{text-decoration:underline;overflow-wrap:anywhere;min-height:44px;padding:8px 0}.lesson-notice{background:#fff1e7;color:#773707;border-radius:12px;padding:14px 18px;white-space:pre-wrap}#moreLectures{margin-top:20px}#classroomRecovery{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}#classroomLogin{margin-bottom:14px}.lesson-save-status{font-size:14px;color:var(--muted);min-height:24px}@media(max-width:800px){main{padding:20px 16px calc(36px + env(safe-area-inset-bottom))}.classroom-heading{align-items:start;flex-direction:column}.lecture-catalog,.classroom-layout{grid-template-columns:1fr}.edu-top{padding:10px 16px;gap:8px}.edu-top b{font-size:16px}.edu-top a{font-size:14px}.lesson-body{padding:20px}.lecture-card{padding:20px}.syllabus{margin-top:6px}#lectureList{max-height:400px}.player-controls{padding:12px}.lesson-pager{flex-wrap:wrap}}