.lessons-section{margin-bottom:10px;border:1px solid rgba(52,152,219,0.2);border-radius:14px;overflow:hidden;background:rgba(26,37,47,0.5)}.lessons-section-header{display:flex;align-items:center;gap:12px;padding:16px 24px;cursor:pointer;user-select:none;transition:background 0.2s}.lessons-section-header:hover{background:rgba(52,152,219,0.07)}.ls-icon{font-size:22px}.ls-title{font-size:16px;font-weight:700;color:var(--text-main)}.ls-count{font-size:12px;color:var(--accent);background:rgba(52,152,219,0.13);border:1px solid rgba(52,152,219,0.25);border-radius:20px;padding:2px 10px;font-weight:600}.ls-arrow{margin-left:auto;font-size:20px;color:var(--accent);opacity:0.5;transition:transform 0.3s ease}.lessons-section.ls-open .ls-arrow{transform:rotate(90deg)}.lessons-section-body{max-height:0;overflow:clip;overflow-clip-margin:12px;transition:max-height 0.4s ease}.lessons-section.ls-open .lessons-section-body{max-height:9999px}.section-divider{height:1px;background:rgba(52,152,219,0.15)}.ls-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:18px 16px 18px}@media (max-width:900px){.ls-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:580px){.ls-grid{grid-template-columns:1fr}}.lesson-card{display:flex;align-items:flex-start;gap:12px;padding:12px 14px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:10px;text-decoration:none;transition:border-color 0.2s,transform 0.2s,box-shadow 0.2s;position:relative;overflow:visible}.lesson-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 6px 18px rgba(0,0,0,0.18)}.lc-num{min-width:30px;height:30px;border-radius:7px;background:rgba(52,152,219,0.1);border:1px solid rgba(52,152,219,0.2);color:var(--accent);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.lc-body{flex:1;min-width:0}.lc-name{font-size:12.5px;color:var(--text-main);line-height:1.4;margin-bottom:6px}.lc-footer{display:flex;align-items:center;justify-content:space-between;gap:6px}.lc-action{font-size:11px;color:var(--accent);opacity:0.75}.lc-status{width:18px;height:18px;border-radius:50%;font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.lcs-open{border:1.5px solid rgba(255,255,255,0.12);background:transparent}.lcs-done{background:#2ecc71;color:#fff;border:none}.lesson-card.cardviewed .lc-num{background:rgba(46,204,113,0.15);border-color:rgba(46,204,113,0.4);color:#2ecc71}.lesson-card.cardviewed::after{content:'✓';position:absolute;top:-7px;right:-7px;width:16px;height:16px;background:#2ecc71;color:#fff;border-radius:50%;font-size:9px;font-weight:700;line-height:16px;text-align:center;box-shadow:0 1px 4px rgba(0,0,0,0.3)}.lesson-card.lc-done{border-color:rgba(241,196,15,0.5);background:rgba(241,196,15,0.04)}.lesson-card.lc-done .lc-num{background:rgba(241,196,15,0.15);border-color:rgba(241,196,15,0.4);color:#f1c40f}.ls-test-banner{margin:8px 0;border:1px solid;border-radius:12px;overflow:hidden;transition:transform 0.15s,box-shadow 0.15s}.ls-test-banner:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,0.18)}.ls-test-link{color:inherit}.ls-test-icon{min-width:44px;height:44px;border-radius:10px;font-size:22px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.ls-test-body{flex:1;min-width:0}.ls-test-title{font-size:14px;font-weight:700;margin-bottom:3px}.ls-test-sub{font-size:11px;color:var(--text-muted,#8b949e);margin-bottom:7px}.ls-test-badges{display:flex;gap:8px;flex-wrap:wrap}.ls-badge{font-size:11px;font-weight:600;border:1px solid;border-radius:20px;padding:2px 10px}.ls-test-arrow{font-size:13px;font-weight:600;white-space:nowrap;margin-left:auto;padding-left:12px;opacity:0.8}