/* Course Details Page Specific Styles */
.course-details {
    background-color: var(--bg-light);
}

/* Course Hero Section */
.course-details .course-hero {
    background-color: var(--bg-light);
    padding: 40px 0;
    border-bottom: 1px solid var(--border-color);
}

.course-details .course-hero h1 {
    color: var(--text-dark);
    margin-bottom: 15px;
    font-size: 2.5rem;
    line-height: 1.2;
}

.course-details .course-hero .lead {
    color: var(--text-muted);
    font-size: 1.2rem;
    margin-bottom: 30px;
    line-height: 1.6;
}

.course-details .course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 20px 0;
}

.course-details .meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.course-details .meta-item i {
    color: var(--primary-color);
    font-size: 1.1rem;
}

/* Course Content Layout */
.course-details .course-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    padding: 40px 0;
}

.course-details .course-main {
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    padding: 30px;
}

.course-details .course-main h2 {
    color: var(--text-dark);
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.course-details .course-description {
    color: var(--text-muted);
    line-height: 1.6;
    margin: 20px 0;
}

/* Course Sidebar */
.course-details .course-sidebar {
    position: sticky;
    top: 20px;
    align-self: start;
}

.course-details .course-card {
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    padding: 25px;
}

.course-details .price-tag {
    font-size: 2rem;
    color: var(--primary-color);
    margin: 20px 0;
    font-weight: 600;
}

.course-details .price-tag .original-price {
    font-size: 1.2rem;
    color: var(--text-muted);
    text-decoration: line-through;
    margin-right: 10px;
}

.course-details .enroll-btn {
    width: 100%;
    padding: 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.course-details .enroll-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

/* Course Features */
.course-details .feature-list {
    list-style: none;
    padding: 0;
    margin: 20px 0;
}

.course-details .feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--text-muted);
}

.course-details .feature-item i {
    color: var(--primary-color);
}

/* Course Curriculum */
.course-details .curriculum-section {
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.course-details .section-header {
    background-color: var(--bg-light);
    padding: 15px 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.course-details .section-header h3 {
    margin: 0;
    color: var(--text-dark);
    font-size: 1.1rem;
}

.course-details .section-content {
    padding: 20px;
    background: #fff;
    display: none;
}

.course-details .section-content.active {
    display: block;
}

/* Breadcrumb */
.course-details .breadcrumb {
    padding: 20px 0;
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.course-details .breadcrumb ul {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.course-details .breadcrumb li {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.course-details .breadcrumb li:not(:last-child)::after {
    content: '/';
    margin-left: 10px;
    color: var(--text-muted);
}

.course-details .breadcrumb a {
    color: var(--text-dark);
    text-decoration: none;
    transition: color 0.3s ease;
}

.course-details .breadcrumb a:hover {
    color: var(--primary-color);
}

/* Related Courses */
.course-details .related-courses {
    margin: 40px 0;
}

.course-details .related-courses h2 {
    margin-bottom: 30px;
    font-size: 1.8rem;
    color: var(--text-dark);
}

.course-details .related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

/* Responsive Design */
@media (max-width: 992px) {
    .course-details .course-content {
        grid-template-columns: 1fr;
    }
    
    .course-details .course-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .course-details .course-hero h1 {
        font-size: 2rem;
    }
    
    .course-details .course-meta {
        flex-direction: column;
        gap: 15px;
    }
    
    .course-details .related-grid {
        grid-template-columns: 1fr;
    }
}