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.empty-exercise-image{filter:invert(1) hue-rotate(180deg);opacity:.8}.lesson-part-section{background-color:#fff;border-radius:20px;padding:0;box-shadow:0 1px 5px #00000040;overflow:hidden;margin-bottom:0}.lesson-part-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:0;padding:8px 12px;border-bottom:1px solid #f0f0f0}.lesson-part-title{font-size:clamp(15px,4vw,18px);font-weight:600;color:#000;margin:0}.lesson-part-carousel{display:flex;align-items:center;gap:8px;position:relative;padding:0 16px}.carousel-items-container{flex:1;display:flex;row-gap:35px;padding:10px 0 4px 12px;align-items:center;transition:max-height .35s ease-in-out;overflow:hidden;flex-wrap:wrap}.carousel-items-container.collapsed{max-height:calc(clamp(60px,20vw,80px) + 14px)}.carousel-items-container.expanded{max-height:500px}.carousel-item-wrapper{display:flex;align-items:center;flex-shrink:0;width:33.33%;justify-content:center;position:relative;transition:opacity .2s 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