.lectures-list{margin-top:1rem;width:100%}.lecture-item{border:1px solid var(--border-primary);overflow:hidden;transition:border-color 0.3s ease;background:var(--dark-card);border-radius:12px;margin-bottom:15px;width:100%}.lecture-item:hover{border-color:var(--primary-color)}.lecture-header{display:flex;align-items:center;gap:1rem;padding:1rem 1.25rem;cursor:pointer;transition:background-color 0.2s ease}.lecture-header:hover{background-color:var(--primary-bg-light)}.lecture-number{flex-shrink:0;width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:var(--primary-bg-color);color:var(--primary-color);font-weight:600;font-size:1rem;border-radius:50%}.lecture-title{flex:1;color:var(--text-light);font-size:1rem;font-weight:500;line-height:1.4}.lecture-toggle{flex-shrink:0;color:var(--text-muted);transition:transform 0.3s ease,color 0.3s ease}.lecture-toggle i{font-size:1.2rem;transition:transform 0.2s ease}.lecture-item.active .lecture-toggle{transform:rotate(180deg);color:var(--primary-color)}.lecture-body{max-height:0;overflow:hidden;padding:0 1.25rem;border-top:1px solid transparent;transition:max-height 0.3s ease,padding 0.3s ease,border-color 0.3s ease}.lecture-item.active .lecture-body{max-height:300px;padding:0 1.25rem 1rem 1.25rem;border-top-color:var(--border-lighter)}.lecture-files{display:flex;flex-wrap:wrap;gap:1rem;padding-top:1rem}@media (max-width:768px){.lecture-header{padding:0.8rem 1rem;gap:0.75rem}.lecture-number{width:30px;height:30px;font-size:0.85rem}.lecture-title{font-size:0.9rem}.lecture-item.active .lecture-body{padding:0 1rem 0.8rem 1rem}.lecture-files{gap:0.75rem}}@media (max-width:576px){.lecture-title{font-size:0.85rem}.lecture-files{flex-direction:column}}.info-card{background:var(--dark-card);border:1px solid var(--border-medium);border-radius:8px;padding:1.5rem;transition:transform 0.3s ease,border-color 0.3s ease;height:100%}.info-card:hover{transform:translateY(-4px);border-color:var(--primary-color)}.info-card__icon{color:var(--primary-color);font-size:2rem;margin-bottom:0.75rem}.info-card__title{color:var(--text-light);font-size:1.1rem;font-weight:600;margin-bottom:0.5rem}.info-card__text{color:var(--text-muted);font-size:0.95rem;line-height:1.5}.info-card__text strong{color:var(--text-light)}@media (max-width:768px){.info-card{padding:1rem}.info-card__title{font-size:1rem}.info-card__icon{font-size:1.75rem}}.download-link{display:inline-flex;align-items:center;gap:0.5rem;padding:0.5rem 1rem;background:var(--border-lighter);border-radius:8px;color:var(--text-light);text-decoration:none;font-size:0.85rem;transition:all 0.2s ease}.download-link:hover{background:var(--primary-bg-color);color:var(--primary-color);transform:translateY(-2px)}.download-link i{font-size:1rem}.download-link--detail{margin-left:auto;background:transparent;border:1px solid var(--border-primary-strong)}.download-link--detail:hover{background:var(--primary-color);color:black;border-color:var(--primary-color)}@media (max-width:768px){.download-link{padding:0.4rem 0.8rem;font-size:0.75rem}.download-link--detail{margin-left:0}}@media (max-width:576px){.download-link{width:100%;justify-content:center}}