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#3b82f61a}.audio-volume-control{display:flex;align-items:center;gap:.5rem}.audio-mute-btn{background:none;border:none;color:#6b7280;cursor:pointer;padding:0;display:flex;align-items:center;transition:color .2s}.audio-mute-btn:hover{color:#111827}.audio-mute-btn svg{width:1.5rem;height:1.5rem}.audio-volume-slider{width:6rem;height:.25rem;background:#e5e7eb;border-radius:.125rem;-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer}.audio-volume-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:1rem;height:1rem;background:#3b82f6;border-radius:50%;cursor:pointer}.audio-volume-slider::-moz-range-thumb{width:1rem;height:1rem;background:#3b82f6;border-radius:50%;cursor:pointer;border:none}.spacer{width:100%;display:block}.divider{border:none;border-top:1px solid #e5e7eb;margin:2rem 0}.divider.thick{border-top:3px solid #e5e7eb}.divider.dashed{border-top:2px dashed #e5e7eb}.divider.dotted{border-top:2px dotted #e5e7eb}.course-recommendation-block{display:flex;gap:24px;background:transparent;border:none;border-radius:12px;padding:24px;margin:32px 0;align-items:center}.course-recommendation-thumbnail{flex-shrink:0;width:280px;height:180px;border-radius:8px;overflow:hidden}.course-recommendation-thumbnail a{display:block;width:100%;height:100%;text-decoration:none}.course-recommendation-thumbnail img{width:100%;height:100%;margin:0!important;-o-object-fit:cover;object-fit:cover}.course-recommendation-content{flex:1;min-width:0}.lesson-content .course-recommendation-title{font-size:1.2rem!important;font-weight:700;color:#1e40af;margin:0 0 12px}.course-recommendation-description{font-size:1rem;color:#475569;margin:0 0 20px;line-height:1.6}.course-recommendation-button{display:inline-flex;align-items:center;gap:8px;background-color:#3b82f6;color:#fff!important;padding:12px 24px;border-radius:8px;font-weight:600;text-decoration:none!important;transition:all .2s}.course-recommendation-button:hover{background-color:#2563eb;transform:translateY(-2px);box-shadow:0 4px 12px #3b82f666;color:#fff!important;text-decoration:none!important}.course-recommendation-button svg{width:18px;height:18px;transition:transform .2s}.course-recommendation-button:hover svg{transform:translate(4px)}@media(max-width:768px){.course-recommendation-block{flex-direction:column;text-align:center}.course-recommendation-thumbnail{width:100%;max-width:400px}}@media(max-width:768px){.bar-label{min-width:80px;font-size:.8125rem}.bar-chart-vertical{height:200px;gap:12px}.bar-item-vertical{max-width:60px}.line-chart{height:200px}.pie-chart-container{flex-direction:column;gap:30px}.comparison-chart{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}.comparison-value{font-size:1.5rem}}@media print{.lesson-block{page-break-inside:avoid;box-shadow:none;border:1px solid #d1d5db}.lesson-block:hover{transform:none;box-shadow:none}}