/* Course Detail Page Specific Styles */

/* Course Header */
.course-header {
    background: linear-gradient(135deg, #7c0345 0%, #cf2a77 100%);
    padding: 60px 0 80px;
    color: var(--white);
    position: relative;
}

.course-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, transparent, #f8f9fa);
    pointer-events: none;
}

.breadcrumb {
    background: transparent;
    padding: 0;
    margin-bottom: 24px;
}

.breadcrumb-item {
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb-item a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb-item a:hover {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--white);
}

.breadcrumb-item + .breadcrumb-item::before {
    color: rgba(255, 255, 255, 0.6);
}

.course-badges {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.course-badges span {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-bestseller {
    background: #ffc107;
    color: #1a1a2e;
}

.badge-updated {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    backdrop-filter: blur(10px);
}

.course-header-title {
    font-size: 42px;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 20px;
}

.course-header-subtitle {
    font-size: 18px;
    line-height: 1.7;
    margin-bottom: 24px;
    opacity: 0.95;
}

.course-meta {
    display: flex;
    align-items: center;
    gap: 32px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.rating-section {
    display: flex;
    align-items: center;
    gap: 8px;
}

.rating-number {
    font-size: 18px;
    font-weight: 700;
}

.stars {
    color: #ffc107;
    font-size: 16px;
}

.rating-count {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

.students-count {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.course-instructor-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    font-size: 15px;
}

.instructor-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--white);
    text-decoration: underline;
    font-weight: 600;
    transition: var(--transition);
}

.instructor-link:hover {
    color: rgba(255, 255, 255, 0.9);
}

.instructor-link img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--white);
}

.course-info-items {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.info-item i {
    font-size: 16px;
}

/* Sticky Purchase Mobile */
.sticky-purchase-mobile {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.15);
    padding: 16px 0;
    z-index: 999;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    display: none;
}

.sticky-purchase-mobile.show {
    transform: translateY(0);
}

.mobile-price {
    display: flex;
    flex-direction: column;
}

.mobile-price .new-price {
    font-size: 24px;
    font-weight: 900;
    color: var(--primary-color);
}

.mobile-price .old-price {
    font-size: 14px;
    color: var(--text-light);
    text-decoration: line-through;
}

/* Course Content Section */
.course-content-section {
    padding: 0px 0 0px;
    background: var(--bg-light);
}

.content-card {
    background: var(--white);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 32px;
    box-shadow: var(--shadow-sm);
}

.content-title {
    font-size: 28px;
    font-weight: 900;
    margin-bottom: 24px;
    color: var(--text-dark);
}

/* Learning Objectives */
.learning-objectives {
    background: var(--bg-light);
    padding: 24px;
    border-radius: 12px;
}

.objective-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 0px;
    font-size: 15px;
    line-height: 1.6;
}

.objective-item:last-child {
    margin-bottom: 0;
}

.objective-item i {
    color: #10b981;
    font-size: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

/* Curriculum */
.section-header{
    margin-bottom: 0px;
}

.curriculum-stats {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    padding: 16px 0;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--bg-light);
    font-size: 14px;
    color: var(--text-light);
}

.curriculum-stats span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.curriculum-stats i {
    color: var(--primary-color);
}

.curriculum-section {
    border: 1px solid #e9ecef;
    border-radius: 8px;
    margin-bottom: 12px;
    overflow: hidden;
}

.section-header {
    padding: 20px 24px;
    cursor: pointer;
    background: var(--white);
    transition: var(--transition);
}

.section-header:hover {
    background: var(--bg-light);
}

.section-header.collapsed .section-info i {
    transform: rotate(-90deg);
}

.section-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.section-info i {
    color: var(--text-light);
    font-size: 14px;
    transition: transform 0.3s ease;
}

.section-info h4 {
    font-size: 17px;
    font-weight: 700;
    margin: 0;
    flex: 1;
    color: var(--text-dark);
}

.section-meta {
    color: var(--text-light);
    font-size: 14px;
}

.section-content {
    background: var(--bg-light);
    padding: 0px 0;
}

.lecture-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    transition: var(--transition);
}

.lecture-item:hover {
    background: rgba(102, 126, 234, 0.05);
}

.lecture-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.lecture-info i {
    color: var(--primary-color);
    font-size: 16px;
}

.lecture-info span {
    font-size: 14px;
    color: var(--text-dark);
}

.lecture-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: var(--text-light);
}

.preview-btn {
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.preview-btn:hover {
    text-decoration: underline;
}

.btn-show-more {
    width: 100%;
    margin-top: 16px;
    padding: 12px;
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-show-more:hover {
    background: var(--primary-color);
    color: var(--white);
}

.btn-show-more i {
    transition: transform 0.3s ease;
}

.btn-show-more.expanded i {
    transform: rotate(180deg);
}

/* Requirements */
.requirements-list {
    list-style: none;
    padding: 0;
}

.requirements-list li {
    padding: 12px 0 12px 32px;
    position: relative;
    font-size: 15px;
    line-height: 1.6;
    border-bottom: 1px solid var(--bg-light);
}

.requirements-list li:last-child {
    border-bottom: none;
}

.requirements-list li::before {
    content: '•';
    position: absolute;
    left: 12px;
    color: var(--primary-color);
    font-size: 24px;
    line-height: 1;
}

/* Description */
.description-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin-top: 24px;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.description-content p {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.description-content ul {
    margin-bottom: 20px;
}

.description-content ul li {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 8px;
}

.btn-show-description {
    background: transparent;
    border: none;
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-show-description:hover {
    color: var(--secondary-color);
}

.btn-show-description i {
    transition: transform 0.3s ease;
}

.btn-show-description.expanded i {
    transform: rotate(180deg);
}

/* Instructor Profile */
.instructor-profile {
    display: flex;
    gap: 24px;
}

.instructor-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.instructor-info h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.instructor-title {
    color: var(--text-light);
    font-size: 16px;
    margin-bottom: 16px;
}

.instructor-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.instructor-stats .stat {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.instructor-stats .stat i {
    color: var(--primary-color);
}

.instructor-bio {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-dark);
    margin-bottom: 12px;
}

/* Reviews */
.reviews-summary {
    margin-bottom: 32px;
}

.rating-overview {
    display: flex;
    gap: 48px;
    align-items: center;
    padding: 32px;
    background: var(--bg-light);
    border-radius: 12px;
}

.overall-rating {
    text-align: center;
}

.overall-rating .rating-number {
    font-size: 56px;
    font-weight: 900;
    color: var(--text-dark);
    display: block;
    line-height: 1;
    margin-bottom: 12px;
}

.overall-rating .stars {
    font-size: 20px;
    margin-bottom: 8px;
}

.overall-rating p {
    color: var(--text-light);
    margin: 0;
    font-size: 14px;
}

.rating-bars {
    flex: 1;
}

.rating-bar-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.progress-bar-container {
    flex: 1;
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    transition: width 0.5s ease;
}

.stars-small {
    color: #ffc107;
    font-size: 12px;
    white-space: nowrap;
}

.percentage {
    color: var(--text-light);
    font-size: 14px;
    min-width: 40px;
    text-align: right;
}

/* Review Item */
.review-item {
    padding: 24px 0;
    border-bottom: 1px solid var(--bg-light);
}

.review-item:last-child {
    border-bottom: none;
}

.review-header {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
}

.review-header img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.review-user {
    flex: 1;
}

.review-user h5 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.review-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.review-date {
    color: var(--text-light);
    font-size: 13px;
}

.review-text {
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.review-helpful {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.review-helpful span {
    color: var(--text-light);
}

.btn-helpful {
    background: transparent;
    border: 1px solid #e9ecef;
    padding: 6px 12px;
    border-radius: 6px;
    color: var(--text-dark);
    cursor: pointer;
    transition: var(--transition);
    font-size: 13px;
}

.btn-helpful:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Purchase Card */
.purchase-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.sticky-card {
    position: sticky;
    top: 100px;
}

.course-preview-video {
    position: relative;
    height: 200px;
    background: var(--bg-light);
}

.preview-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    color: var(--primary-color);
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.play-button:hover {
    transform: translate(-50%, -50%) scale(1.1);
    background: var(--white);
}

.purchase-card-content {
    padding: 24px;
}

.price-section {
    margin-bottom: 16px;
}

.current-price {
    font-size: 36px;
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.original-price {
    font-size: 18px;
    color: var(--text-light);
    text-decoration: line-through;
    margin-right: 8px;
}

.discount-badge {
    display: inline-block;
    background: #10b981;
    color: var(--white);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 700;
}

.urgency-notice {
    background: #fef3c7;
    border: 1px solid #fbbf24;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 14px;
    color: #78350f;
}

.urgency-notice i {
    color: #f59e0b;
    margin-top: 2px;
}

.guarantee-badge {
    text-align: center;
    padding: 16px;
    background: var(--bg-light);
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
}

.guarantee-badge i {
    color: #10b981;
    font-size: 18px;
}

.course-includes h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.course-includes ul {
    list-style: none;
    padding: 0;
}

.course-includes ul li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-dark);
    border-bottom: 1px solid var(--bg-light);
}

.course-includes ul li:last-child {
    border-bottom: none;
}

.course-includes ul li i {
    color: var(--primary-color);
    font-size: 16px;
    width: 20px;
}

.share-section {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--bg-light);
}

.share-section h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.share-buttons {
    display: flex;
    gap: 8px;
}

.share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid #e9ecef;
    background: var(--white);
    color: var(--text-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.share-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* Related Courses */
.related-courses-section {
    padding: 80px 0;
    background: var(--white);
}

.course-card-small {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.course-card-small:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.course-card-small img {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.course-card-small .card-content {
    padding: 16px;
}

.course-card-small h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.instructor-small {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 8px;
}

.rating-small {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    margin-bottom: 8px;
}

.rating-small i {
    color: #ffc107;
}

.rating-small span:first-child {
    font-weight: 700;
    color: var(--text-dark);
}

.rating-small span:last-child {
    color: var(--text-light);
}

.price-small {
    display: flex;
    align-items: center;
    gap: 8px;
}

.price-small .current {
    font-size: 18px;
    font-weight: 900;
    color: var(--primary-color);
}

.price-small .original {
    font-size: 14px;
    color: var(--text-light);
    text-decoration: line-through;
}

/* Mobile Responsive */
@media (max-width: 991px) {
    .sticky-purchase-mobile {
        display: block;
    }

    .purchase-card {
        position: relative !important;
        top: auto !important;
        margin-bottom: 32px;
    }

    .course-header-title {
        font-size: 32px;
    }

    .rating-overview {
        flex-direction: column;
        gap: 24px;
    }

    .instructor-profile {
        flex-direction: column;
        text-align: center;
    }

    .instructor-avatar {
        margin: 0 auto;
    }

    .instructor-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .course-header {
        padding: 40px 0 60px;
    }

    .course-header-title {
        font-size: 26px;
    }

    .course-header-subtitle {
        font-size: 16px;
    }

    .content-card {
        padding: 24px 20px;
    }

    .content-title {
        font-size: 24px;
    }

    .current-price {
        font-size: 28px;
    }

    .course-meta {
        gap: 16px;
    }

    .curriculum-stats {
        flex-direction: column;
        gap: 12px;
    }

    .section-info {
        flex-wrap: wrap;
    }

    .section-meta {
        width: 100%;
        margin-top: 8px;
    }
}