/* ==========================================
   REVIEWS PAGE - Design System v25
   Reviews Aggregator Page
   ========================================================================== */

/* CSS Variables specific to reviews page */
:root {
    --color-card-bg: #ffffff;
    --color-text: #212121;
    --color-text-secondary: #757575;
    --color-border: #e0e0e0;
    --color-primary: #558B2F;
    --color-primary-dark: #33691E;
    --color-success: #4CAF50;
    --color-success-dark: #2E7D32;
    --color-error: #D32F2F;
    --color-error-dark: #C62828;

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* Main Grid Layout */
.reviews-page-grid {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

/* ==========================================
   LEFT COLUMN - Reviews Feed
   ========================================== */
.reviews-feed {
    min-width: 0; /* Allow flex/grid to shrink below content size */
}

/* Course Filter Section */
.course-filter-section {
    background: var(--color-card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.filter-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.course-filter-select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: white;
    font-size: 0.9375rem;
    color: var(--color-text);
    cursor: pointer;
    transition: border-color 0.2s;
    font-family: 'Open Sans', sans-serif;
}

.course-filter-select:hover {
    border-color: var(--color-primary);
}

.course-filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(85, 139, 47, 0.1);
}

.feed-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    gap: var(--spacing-md);
}

.feed-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0;
}

.sort-select-compact {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: white;
    font-size: 0.875rem;
    color: var(--color-text);
    cursor: pointer;
    transition: border-color 0.2s;
    min-width: 160px;
}

.sort-select-compact:hover {
    border-color: var(--color-primary);
}

.sort-select-compact:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(85, 139, 47, 0.1);
}

/* Reviews Feed List */
.reviews-feed-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Review Feed Card - Compact version for aggregator */
.review-feed-card {
    background: var(--color-card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
    border: 1px solid var(--color-border);
}

.review-feed-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.review-feed-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-md);
}

.review-feed-author {
    flex: 1;
    min-width: 0;
}

.review-feed-course-name {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0 0 var(--spacing-xs);
    text-decoration: none;
    display: inline-block;
    transition: color 0.2s;
}

.review-feed-course-name:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.review-feed-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    flex-wrap: wrap;
}

.review-feed-author-name {
    font-weight: 600;
    color: var(--color-text);
}

.review-feed-date {
    color: var(--color-text-secondary);
}

.review-feed-rating {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-xs);
}

.rating-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.rating-stars-small {
    display: flex;
    gap: 2px;
}

.star-small {
    color: #FFA000;
    font-size: 0.875rem;
}

.star-small.empty {
    color: var(--color-gray-300);
}

.review-feed-snippet {
    color: var(--color-text);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.review-feed-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.review-feed-tags {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.review-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-gray-100);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-gray-700);
    border: 1px solid var(--color-gray-200);
}

.review-tag.recommend {
    background: rgba(76, 175, 80, 0.1);
    border-color: var(--color-success);
    color: var(--color-success-dark);
}

.btn-read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-read-more:hover {
    background: var(--color-primary);
    color: white;
    transform: translateX(2px);
}

.btn-read-more svg {
    width: 16px;
    height: 16px;
}

/* Load More Button */
.load-more-container {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.btn-load-more {
    padding: var(--spacing-md) var(--spacing-xl);
    background: white;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-load-more:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==========================================
   RIGHT COLUMN - Sidebar
   ========================================== */
.reviews-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.sidebar-widget {
    background: var(--color-card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.widget-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.widget-title svg {
    color: var(--color-primary);
}

/* Top Courses List */
.top-courses-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.top-course-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    text-decoration: none;
    border: 1px solid transparent;
}

.top-course-item:hover {
    background: white;
    border-color: var(--color-primary);
    transform: translateX(4px);
}

.top-course-rank {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.top-course-info {
    flex: 1;
    min-width: 0;
}

.top-course-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 var(--spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.top-course-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.top-course-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-primary);
}

.top-course-rating svg {
    width: 14px;
    height: 14px;
    color: #FFA000;
}

/* Stats Widget */
.stats-widget {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    text-align: center;
}

.stat-item-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-item-label {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==========================================
   Empty State
   ========================================== */
.empty-state-card {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--color-card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.empty-state-icon {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state-icon svg {
    width: 48px;
    height: 48px;
}

.empty-state-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 var(--spacing-sm);
}

.empty-state-text {
    color: var(--color-text-secondary);
    margin: 0 0 var(--spacing-lg);
    font-size: 0.9375rem;
}

/* ==========================================
   Loading State
   ========================================== */
.loading-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-2xl);
    background: var(--color-card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.loading-container p {
    margin-top: var(--spacing-md);
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 1024px) {
    .reviews-page-grid {
        grid-template-columns: 1fr 300px;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .reviews-page-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .reviews-sidebar {
        order: -1; /* Show sidebar above feed on mobile */
    }

    .feed-header {
        flex-direction: column;
        align-items: stretch;
    }

    .sort-select-compact {
        width: 100%;
    }

    .review-feed-header {
        flex-direction: column;
    }

    .review-feed-rating {
        align-items: flex-start;
    }

    .review-feed-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .btn-read-more {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .feed-title {
        font-size: 1.5rem;
    }

    .review-feed-card {
        padding: var(--spacing-md);
    }

    .review-feed-course-name {
        font-size: 1rem;
    }

    .rating-number {
        font-size: 1.5rem;
    }

    .sidebar-widget {
        padding: var(--spacing-md);
    }

    .top-course-item {
        padding: var(--spacing-sm);
    }
}