.course-detail{background-color:#f8f9fa;min-height:100vh;padding:2rem 0}.course-detail__container{max-width:1200px;margin:0 auto;padding:0 1rem}.course-detail__header{background:#fff;border-radius:12px;margin-bottom:2rem;padding:2rem;box-shadow:0 2px 10px #0000001a}.course-detail__header .course-detail__ratings{margin-bottom:1rem}.course-detail__header .course-detail__ratings .rating-stars{gap:.25rem;display:flex}.course-detail__header .course-detail__ratings .rating-stars .star{color:#ddd}.course-detail__header .course-detail__ratings .rating-stars .star.filled{color:#ffc107}.course-detail__header .course-detail__title{color:#1a1a1a;margin:1rem 0;font-size:2.5rem;font-weight:700;line-height:1.3}@media (max-width:768px){.course-detail__header .course-detail__title{font-size:1.8rem}}.course-detail__header .course-detail__meta{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;display:flex}.course-detail__header .course-detail__meta .course-meta .category{color:#666;font-size:1rem}.course-detail__header .course-detail__meta .course-meta .category a{color:#007bff;font-weight:500;text-decoration:none}.course-detail__header .course-detail__meta .course-meta .category a:hover{text-decoration:underline}.course-detail__header .course-detail__meta .course-actions{gap:1rem;display:flex}.course-detail__content{grid-template-columns:1fr 400px;gap:2rem;display:grid}@media (max-width:1024px){.course-detail__content{grid-template-columns:1fr}}.course-detail__main{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 10px #0000001a}.course-detail__sidebar{flex-direction:column;gap:1.5rem;display:flex}.course-thumbnail{aspect-ratio:16/9;width:100%;overflow:hidden}.course-thumbnail img{object-fit:cover;width:100%;height:100%}.course-tabs .tabs-nav{background:#f8f9fa;border-bottom:1px solid #e9ecef;padding:0 2rem;display:flex}.course-tabs .tabs-nav .tab-link{color:#666;cursor:pointer;background:0 0;border:none;border-bottom:3px solid #0000;padding:1rem 1.5rem;font-size:1rem;font-weight:500;transition:all .3s}.course-tabs .tabs-nav .tab-link:hover{color:#007bff;background:#007bff1a}.course-tabs .tabs-nav .tab-link.active{color:#007bff;background:#fff;border-bottom-color:#007bff}.course-tabs .tab-content{padding:2rem}.course-about{margin-bottom:3rem}.course-about h2{color:#1a1a1a;margin-bottom:1rem;font-size:1.75rem;font-weight:700}.course-about .course-description{color:#666;font-size:1rem;line-height:1.7}.course-about .course-description p{margin-bottom:1rem}.course-content h3{color:#1a1a1a;margin-bottom:1.5rem;font-size:1.5rem;font-weight:700}.accordion{border:1px solid #e9ecef;border-radius:8px;overflow:hidden}.accordion-item{border-bottom:1px solid #e9ecef}.accordion-item:last-child{border-bottom:none}.accordion-header{text-align:left;color:#1a1a1a;cursor:pointer;background:#f8f9fa;border:none;justify-content:space-between;align-items:center;width:100%;padding:1.25rem 1.5rem;font-size:1.125rem;font-weight:600;transition:background-color .3s;display:flex}.accordion-header:hover,.accordion-header.active{background:#e9ecef}.accordion-header .accordion-icon{font-size:1.25rem;font-weight:400;transition:transform .3s}.accordion-body{background:#fff;padding:1.5rem;animation:.3s slideDown}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.lesson-list{margin:0;padding:0;list-style:none}.lesson-list .lesson-item{border-bottom:1px solid #f1f3f4;align-items:center;gap:.75rem;padding:.75rem 0;display:flex}.lesson-list .lesson-item:last-child{border-bottom:none}.lesson-list .lesson-item .lesson-icon{color:#666;flex-shrink:0;font-size:1.25rem}.lesson-list .lesson-item .lesson-content{flex-direction:column;flex:1;gap:.25rem;display:flex}.lesson-list .lesson-item .lesson-content .lesson-title{color:#1a1a1a;margin:0;font-size:1rem;font-weight:500;line-height:1.4}.lesson-list .lesson-item .lesson-content .lesson-duration{color:#666;font-size:.875rem;font-weight:400}.lesson-list .lesson-item .lesson-lock{color:#999;flex-shrink:0;font-size:1rem}.reviews-section h3{color:#1a1a1a;margin-bottom:1.5rem;font-size:1.5rem;font-weight:700}.reviews-section .empty-state{text-align:center;padding:3rem 2rem}.reviews-section .empty-state img{opacity:.6;max-width:200px;margin-bottom:1rem}.reviews-section .empty-state p{color:#666;font-size:1.125rem}.sidebar-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 10px #0000001a}.sidebar-card .pricing-section{border-bottom:1px solid #e9ecef;padding:1.5rem}.sidebar-card .pricing-section .price-display{align-items:baseline;gap:.75rem;margin-bottom:1.5rem;display:flex}.sidebar-card .pricing-section .price-display .current-price{color:#1a1a1a;font-size:2rem;font-weight:700}.sidebar-card .pricing-section .price-display .original-price{color:#999;font-size:1rem}.sidebar-card .pricing-section .add-to-cart{justify-content:center;align-items:center;gap:.5rem;width:100%;padding:.875rem 1.5rem;font-size:1rem;font-weight:600;display:flex}.sidebar-card .pricing-section .add-to-cart .btn-icon{font-size:1.125rem}.sidebar-card .course-info{padding:1.5rem}.sidebar-card .course-info .info-list{margin:0;padding:0;list-style:none}.sidebar-card .course-info .info-list .info-item{color:#666;align-items:center;gap:.75rem;padding:.75rem 0;font-size:1rem;display:flex}.sidebar-card .course-info .info-list .info-item .info-icon{color:#1a1a1a;font-size:1.125rem}.sidebar-widget{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 2px 10px #0000001a}.sidebar-widget h3{color:#1a1a1a;margin-bottom:1rem;font-size:1.25rem;font-weight:700}.sidebar-widget .widget-list{margin:0;padding:0;list-style:none}.sidebar-widget .widget-list li{color:#1a1a1a;align-items:flex-start;gap:.75rem;margin-bottom:.75rem;font-size:1rem;line-height:1.5;display:flex}.sidebar-widget .widget-list li:last-child{margin-bottom:0}.sidebar-widget .widget-list li .bullet-point{color:#999;flex-shrink:0;margin-top:.125rem;font-weight:700}.btn{cursor:pointer;border:none;border-radius:6px;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:.875rem;font-weight:500;text-decoration:none;transition:all .3s;display:inline-flex}.btn--primary{color:#fff;background:#007bff}.btn--primary:hover{background:#0056b3;transform:translateY(-1px)}.btn--ghost{color:#666;background:0 0;border:1px solid #e9ecef}.btn--ghost:hover{color:#1a1a1a;background:#f8f9fa}.btn--block{justify-content:center;width:100%}.btn .icon{font-size:1rem}@media (max-width:768px){.course-detail{padding:1rem 0}.course-detail__container{padding:0 .5rem}.course-detail__header{padding:1.5rem}.course-detail__header .course-detail__meta{flex-direction:column;align-items:flex-start}.course-detail__header .course-detail__meta .course-actions{justify-content:center;width:100%}.course-detail__content{gap:1rem}.course-tabs .tabs-nav{padding:0 1rem}.course-tabs .tabs-nav .tab-link{padding:.75rem 1rem;font-size:.875rem}.course-tabs .tab-content{padding:1.5rem}.sidebar-card,.sidebar-widget{margin:0 .5rem}}