/* ========================================
   Страница курса
======================================== */

/* Шапка курса */
.course-header {
    background: var(--primary);
    padding: 100px 0 60px;
    color: var(--white);
}

/* Хлебные крошки */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 32px;
    font-size: 14px;
    opacity: 0.8;
}

.breadcrumbs a {
    color: var(--white);
    transition: opacity var(--transition-fast);
}

.breadcrumbs a:hover {
    opacity: 1;
    text-decoration: underline;
}

.breadcrumbs span {
    opacity: 0.6;
}

/* Hero курса */
.course-hero {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 60px;
    align-items: center;
}

.course-hero-content .course-badge {
    display: inline-block;
    background: var(--accent-orange);
    padding: 8px 16px;
    border-radius: var(--radius-xl);
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 16px;
}

.course-hero-content .course-title {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--white);
}

/* Белый текст в шапке курса */
.course-header h1,
.course-header h2,
.course-header h3,
.course-header p,
.course-header span,
.course-header .course-description {
    color: var(--white);
}

.course-hero-content .course-description {
    font-size: 18px;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 24px;
}

.course-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 32px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
}

.stat-icon {
    font-size: 20px;
}

.course-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.favorite-course-btn .heart {
    font-size: 18px;
    transition: transform var(--transition-fast);
}

.favorite-course-btn:hover .heart {
    transform: scale(1.2);
}

.favorite-course-btn.active {
    background: rgba(232, 67, 147, 0.2);
    border-color: #E84393;
    color: #E84393;
}

.favorite-course-btn.active .heart::before {
    content: '♥';
}

/* Превью видео */
.course-hero-preview {
    display: flex;
    justify-content: center;
}

.video-preview {
    position: relative;
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.video-preview img {
    width: 100%;
    height: auto;
    display: block;
}

.play-preview-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: var(--white);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
}

.play-preview-btn:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

.play-icon {
    font-size: 28px;
    color: var(--primary);
    margin-left: 4px;
}

/* ========================================
   Контент курса
======================================== */

.course-content-section {
    padding: 60px 0;
    background: var(--light);
}

.course-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 40px;
    align-items: start;
}

/* Уроки */
.course-lessons {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
}

.section-header-inline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.section-header-inline h2 {
    font-size: 24px;
    font-weight: 800;
}

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

.progress-text {
    font-size: 14px;
    color: var(--gray-dark);
}

.mini-progress {
    width: 100px;
    height: 8px;
    background: var(--gray-light);
    border-radius: 4px;
    overflow: hidden;
}

.mini-progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width var(--transition-slow);
}

/* Модули */
.lesson-module {
    border: 1px solid var(--gray-light);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
}

.lesson-module:last-child {
    margin-bottom: 0;
}

.module-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: var(--light);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.module-header:hover {
    background: var(--gray-light);
}

.module-number {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.module-title {
    font-size: 18px;
    font-weight: 700;
    margin-top: 4px;
}

.module-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: var(--gray-dark);
}

.module-toggle {
    font-size: 12px;
    transition: transform var(--transition-fast);
}

.lesson-module.collapsed .module-toggle {
    transform: rotate(-90deg);
}

.lesson-module.collapsed .module-lessons {
    display: none;
}

/* Уроки в модуле */
.module-lessons {
    border-top: 1px solid var(--gray-light);
}

.lesson-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--gray-light);
    transition: background var(--transition-fast);
    text-decoration: none;
    color: inherit;
}

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

.lesson-item:hover {
    background: var(--light);
}

.lesson-status {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.lesson-item.completed .lesson-status {
    background: var(--accent-orange);
    color: var(--white);
}

.lesson-item.current .lesson-status {
    background: var(--primary);
    color: var(--white);
    animation: pulse 2s infinite;
}

.lesson-item.locked .lesson-status {
    background: var(--gray-light);
    font-size: 12px;
}

.lesson-item.locked {
    opacity: 0.6;
    cursor: not-allowed;
}

.lesson-info {
    flex: 1;
}

.lesson-number {
    font-size: 12px;
    color: var(--gray-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lesson-title {
    font-size: 16px;
    font-weight: 700;
    margin: 4px 0;
}

.lesson-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--gray-dark);
}

.lesson-arrow {
    font-size: 18px;
    color: var(--gray);
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.lesson-item:hover .lesson-arrow {
    transform: translateX(4px);
    color: var(--primary);
}

/* ========================================
   Боковая панель
======================================== */

.course-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 90px;
}

.sidebar-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.sidebar-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
}

/* Карточка преподавателя */
.teacher-info {
    display: flex;
    gap: 16px;
    align-items: center;
}

.teacher-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.teacher-details h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.teacher-details p {
    font-size: 13px;
    color: var(--gray-dark);
    margin-bottom: 4px;
}

.teacher-rating {
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
}

/* Списки */
.learn-list,
.requirements-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.learn-list li,
.requirements-list li {
    font-size: 14px;
    line-height: 1.5;
    color: var(--dark);
    padding-left: 8px;
}

.requirements-list li {
    position: relative;
    padding-left: 20px;
}

.requirements-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* Сертификат */
.certificate-card {
    text-align: center;
    background: linear-gradient(135deg, #FFF9E6 0%, #FFF3CD 100%);
    border: 2px solid var(--accent-yellow);
}

.certificate-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.certificate-card h3 {
    margin-bottom: 8px;
}

.certificate-card p {
    font-size: 14px;
    color: var(--gray-dark);
}

/* ========================================
   Отзывы
======================================== */

.reviews-section {
    padding: 80px 0;
    background: var(--white);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.review-card {
    background: var(--light);
    border-radius: var(--radius-lg);
    padding: 24px;
}

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

.review-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.review-author {
    flex: 1;
}

.review-author h4 {
    font-size: 16px;
    font-weight: 700;
}

.review-date {
    font-size: 12px;
    color: var(--gray-dark);
}

.review-rating {
    color: #FFD93D;
    font-size: 14px;
}

.review-text {
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-dark);
}

/* ========================================
   Страницы курсов с модулями
======================================== */

.course-content-section {
    padding: 60px 0;
    background: var(--light);
}

.course-content-section .section-title {
    margin-bottom: 32px;
}

/* Карточка модуля */
.module-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.module-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    cursor: pointer;
    transition: background var(--transition-fast);
}

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

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

.module-number {
    background: var(--primary);
    color: var(--white);
    padding: 6px 14px;
    border-radius: var(--radius-xl);
    font-size: 13px;
    font-weight: 700;
}

.module-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
}

.module-meta {
    font-size: 14px;
    color: var(--gray-dark);
}

.module-toggle {
    font-size: 14px;
    color: var(--gray);
    transition: transform var(--transition-fast);
}

/* Уроки в модуле */
.module-lessons {
    border-top: 1px solid var(--gray-light);
}

.module-lessons.collapsed {
    display: none;
}

.lesson-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--gray-light);
    transition: background var(--transition-fast);
    text-decoration: none;
    color: inherit;
}

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

.lesson-item:hover {
    background: var(--light);
}

.lesson-number {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.lesson-info {
    flex: 1;
}

.lesson-info h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 4px;
}

.lesson-info p {
    font-size: 14px;
    color: var(--gray-dark);
}

.lesson-duration {
    font-size: 13px;
    color: var(--gray);
    white-space: nowrap;
}

/* Превью видео в шапке курса */
.course-hero-preview {
    flex-shrink: 0;
}

.video-preview-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 380px;
    transition: transform var(--transition-normal);
}

.video-preview-card:hover {
    transform: translateY(-8px);
}

.video-thumbnail {
    position: relative;
    height: 220px;
    overflow: hidden;
}

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

.play-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    transition: background var(--transition-fast);
}

.play-overlay:hover {
    background: rgba(0, 0, 0, 0.5);
}

.play-icon {
    width: 70px;
    height: 70px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--primary);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    transition: transform var(--transition-fast);
}

.play-overlay:hover .play-icon {
    transform: scale(1.1);
}

.preview-info {
    padding: 20px;
}

.preview-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent-orange);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.preview-info h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin: 8px 0;
}

.preview-info p {
    font-size: 14px;
    color: var(--gray-dark);
}

/* Стили для travel курса */
.course-header-travel {
    background: var(--accent-orange);
}

.course-header-travel .course-badge {
    background: rgba(255, 255, 255, 0.2);
}

/* ========================================
   Адаптивность
======================================== */

@media (max-width: 1024px) {
    .course-hero {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .course-stats {
        justify-content: center;
    }
    
    .course-actions {
        justify-content: center;
    }
    
    .course-hero-preview {
        order: -1;
        display: flex;
        justify-content: center;
    }
    
    .video-preview-card {
        width: 100%;
        max-width: 400px;
    }
    
    .course-layout {
        grid-template-columns: 1fr;
    }
    
    .course-sidebar {
        position: static;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
    
    .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .course-hero-content .course-title {
        font-size: 32px;
    }
    
    .course-stats {
        flex-direction: column;
        gap: 12px;
    }
    
    .course-actions {
        flex-direction: column;
    }
    
    .course-sidebar {
        grid-template-columns: 1fr;
    }
    
    .section-header-inline {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .module-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .module-meta {
        width: 100%;
        justify-content: space-between;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
}