/* 
 * Popular Courses Block Styles - INDEPENDENT VERSION
 * All styles scoped to .popular-courses-block to avoid conflicts
 * Based on category_course_tabs but completely independent
 */

/* CSS Variables scoped to block */
.popular-courses-block {
    /* Colors - Easy to customize */
    --course-tab-primary: #007bff;
    --course-tab-primary-hover: #0056b3;
    --course-tab-secondary: #6c757d;
    --course-card-bg: #ffffff;
    --course-card-border: #e9ecef;
    --course-card-shadow: rgba(0, 0, 0, 0.1);
    --course-card-hover-shadow: rgba(0, 0, 0, 0.15);
    --course-price-color: #28a745;
    --course-level-basic: #17a2b8;
    --course-level-intermediate: #ffc107;
    --course-level-advanced: #dc3545;
    --course-meta-color: #6c757d;
    --course-title-color: #212529;
    
    /* Typography */
    --course-title-font-size: 1.1rem;
    --course-title-font-weight: 600;
    --course-summary-font-size: 0.9rem;
    --course-meta-font-size: 0.8rem;
    --course-price-font-size: 1rem;
    --course-price-font-weight: bold;
    
    /* Spacing */
    --course-card-padding: 1rem;
    --course-card-margin: 0.75rem;
    --course-card-border-radius: 8px;
    --course-image-height: 180px;
    
    /* Carousel */
    --carousel-nav-size: 40px;
    --carousel-nav-bg: rgba(255, 255, 255, 0.9);
    --carousel-nav-border: #dee2e6;
    
    /* Block properties */
    margin: 2rem 0;
    font-family: inherit;
    contain: style layout;
    isolation: isolate;
}

/* Carousel Container */
.popular-courses-block .course-carousel-container {
    position: relative;
    overflow: hidden;
}

.popular-courses-block .course-carousel {
    overflow-x: auto;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
    padding: 0 60px; /* Space for navigation buttons */
    margin: 0 -60px;
}

.popular-courses-block .course-carousel::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

.popular-courses-block .course-cards-wrapper {
    display: flex;
    gap: var(--course-card-margin);
    padding: 1rem 0;
}

/* Carousel Navigation */
.popular-courses-block .carousel-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: var(--carousel-nav-size);
    height: var(--carousel-nav-size);
    background: var(--carousel-nav-bg);
    border: 1px solid var(--carousel-nav-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    color: var(--course-tab-secondary);
}

.popular-courses-block .carousel-nav:hover {
    background: #ffffff;
    color: var(--course-tab-primary);
    box-shadow: 0 2px 8px var(--course-card-shadow);
}

.popular-courses-block .carousel-prev {
    left: 10px;
}

.popular-courses-block .carousel-next {
    right: 10px;
}

/* Course Cards */
.popular-courses-block .course-card {
    flex: 0 0 300px; /* Fixed width for horizontal scrolling */
    background: var(--course-card-bg);
    border: 1px solid var(--course-card-border);
    border-radius: var(--course-card-border-radius);
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px var(--course-card-shadow);
}

.popular-courses-block .course-card:hover {
    box-shadow: 0 4px 12px var(--course-card-hover-shadow);
    transform: translateY(-2px);
}

.popular-courses-block .course-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.popular-courses-block .course-card-link:hover {
    text-decoration: none;
    color: inherit;
}

/* Course Image */
.popular-courses-block .course-image {
    position: relative;
    height: var(--course-image-height);
    overflow: hidden;
}

.popular-courses-block .course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.popular-courses-block .course-card:hover .course-image img {
    transform: scale(1.05);
}

/* Level Badge */
.popular-courses-block .course-level-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.popular-courses-block .level-basic {
    background-color: var(--course-level-basic);
}

.popular-courses-block .level-intermediate {
    background-color: var(--course-level-intermediate);
}

.popular-courses-block .level-advanced {
    background-color: var(--course-level-advanced);
}

/* Course Content */
.popular-courses-block .course-content {
    padding: var(--course-card-padding);
}

.popular-courses-block .course-title {
    font-size: var(--course-title-font-size);
    font-weight: var(--course-title-font-weight);
    color: var(--course-title-color);
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.popular-courses-block .course-summary {
    font-size: var(--course-summary-font-size);
    color: var(--course-tab-secondary);
    margin: 0 0 1rem 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Course Meta */
.popular-courses-block .course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.popular-courses-block .course-area,
.popular-courses-block .course-duration {
    font-size: var(--course-meta-font-size);
    color: var(--course-meta-color);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Course Price */
.popular-courses-block .course-price {
    font-size: var(--course-price-font-size);
    font-weight: var(--course-price-font-weight);
    color: var(--course-price-color);
    text-align: right;
}

/* Loading state for popular courses */
.popular-courses-block .loading-placeholder {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
    color: var(--course-tab-secondary);
    font-style: italic;
}

/* Empty state styling - for when no course IDs are set or courses not found */
.popular-courses-block .no-courses-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--course-tab-secondary);
    font-style: italic;
    background-color: var(--course-card-bg);
    border: 1px solid var(--course-card-border);
    border-radius: var(--course-card-border-radius);
}

/* Focus styles for accessibility */
.popular-courses-block .course-card-link:focus {
    outline: 2px solid var(--course-tab-primary);
    outline-offset: 2px;
    border-radius: var(--course-card-border-radius);
}

/* Responsive Design */
@media (max-width: 768px) {
    .popular-courses-block {
        --course-card-margin: 0.5rem;
        --course-card-padding: 0.75rem;
        --course-image-height: 150px;
        margin: 1.5rem 0;
    }
    
    /* Mobile: Stack cards vertically */
    .popular-courses-block .course-carousel {
        padding: 0;
        margin: 0;
        overflow: visible;
    }
    
    .popular-courses-block .course-cards-wrapper {
        flex-direction: column;
        gap: var(--course-card-margin);
    }
    
    .popular-courses-block .course-card {
        flex: none;
        width: 100%;
    }
    
    /* Hide carousel navigation on mobile */
    .popular-courses-block .carousel-nav {
        display: none;
    }
    
    .popular-courses-block .course-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .popular-courses-block {
        --course-title-font-size: 1rem;
        --course-summary-font-size: 0.85rem;
        --course-meta-font-size: 0.75rem;
        margin: 1rem 0;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .popular-courses-block {
        --course-card-border: #000000;
        --course-card-shadow: rgba(0, 0, 0, 0.3);
        --course-card-hover-shadow: rgba(0, 0, 0, 0.5);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .popular-courses-block .course-card,
    .popular-courses-block .carousel-nav,
    .popular-courses-block .course-image img {
        transition: none;
    }
    
    .popular-courses-block .course-card:hover {
        transform: none;
    }
    
    .popular-courses-block .course-card:hover .course-image img {
        transform: none;
    }
}