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.number{width:28px;height:28px;font-size:var(--ion-font-size-xs)}.lesson-item-title{font-size:var(--ion-font-size-md)}.lesson-item-preview{font-size:var(--ion-font-size-xs);-webkit-line-clamp:3}.lessons-grid{grid-template-columns:1fr;gap:var(--ion-spacing-md)}.lesson-content-header{flex-direction:column;text-align:center;gap:var(--ion-spacing-sm)}.lesson-content-title{font-size:var(--ion-font-size-xl)}.lesson-content-body{padding:var(--ion-spacing-lg) var(--ion-spacing-md)}.section,.chapter-overview{padding:var(--ion-spacing-lg)}.chapter-title{font-size:var(--ion-font-size-2xl)}.chapter-description{font-size:var(--ion-font-size-base)}.stat{font-size:var(--ion-font-size-xs);padding:var(--ion-spacing-xs) var(--ion-spacing-sm)}}@media (max-width: 480px){.lesson-item{padding:var(--ion-spacing-sm)}.lesson-item-header{gap:var(--ion-spacing-xs)}.lesson-item-number 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