/* =====================================================
   LEARNING HUB - Page Specific Styles
   ===================================================== */

/* CSS Variables for Learning Hub inline styles compatibility */
:root {
    --color-primary: var(--primary-blue, #3B82F6);
    --color-surface: var(--bg-primary, #fff);
    --color-background: var(--bg-secondary, #f8fafc);
    --color-text-secondary: var(--text-secondary, #64748b);
    --color-border: var(--border-color, #e2e8f0);
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    
    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
}

/* App Container */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Overrides for Learning Hub */
.app-container .sidebar {
    width: 260px;
    background: var(--bg-primary, #fff);
    border-right: 1px solid var(--border-color, #e2e8f0);
    padding: 1rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.app-container .sidebar-header {
    padding: 0.5rem 0;
    margin-bottom: 1.5rem;
}

.app-container .sidebar-header .logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--primary-blue, #3B82F6);
    font-weight: 700;
    font-size: 1.25rem;
}

.app-container .sidebar-header .logo i {
    font-size: 1.5rem;
}

.app-container .sidebar-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.app-container .sidebar-nav li {
    margin-bottom: 0.25rem;
}

.app-container .sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary, #64748b);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s;
}

.app-container .sidebar-nav a:hover {
    background: var(--bg-secondary, #f8fafc);
    color: var(--text-primary, #1e293b);
}

.app-container .sidebar-nav li.active a {
    background: var(--primary-blue, #3B82F6);
    color: white;
}

.app-container .sidebar-nav a i {
    width: 1.25rem;
    text-align: center;
}

/* Main Content */
.app-container .main-content {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
    background: var(--bg-secondary, #f8fafc);
}

/* Topbar */
.topbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-primary, #fff);
    border-bottom: 1px solid var(--border-color, #e2e8f0);
    position: sticky;
    top: 0;
    z-index: 100;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--primary-blue);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.search-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-secondary, #f8fafc);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    flex: 1;
    max-width: 400px;
}

.search-wrapper i {
    color: var(--text-muted, #94a3b8);
}

.search-wrapper input {
    border: none;
    background: transparent;
    outline: none;
    flex: 1;
    font-size: 0.875rem;
}

/* Content Area */
.content-area {
    padding: 1.5rem;
}

/* Hub Hero */
.hub-hero {
    background: linear-gradient(135deg, var(--primary-blue, #3B82F6) 0%, #818CF8 100%);
    border-radius: 16px;
    padding: 2.5rem;
    color: white;
    margin-bottom: 2rem;
}

.hub-hero h1 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.hub-hero p {
    font-size: 1rem;
    opacity: 0.9;
    margin: 0;
    max-width: 600px;
}

/* Categories Section */
.categories-section {
    margin-bottom: 2rem;
}

.categories-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 1.5rem 0;
    color: var(--text-primary, #1e293b);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

/* Category Card */
.category-card {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    text-decoration: none;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.1));
    border-color: transparent;
}

.category-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.category-card.dyslexia .category-icon {
    background: var(--dyslexia-bg, #EFF6FF);
    color: var(--dyslexia-color, #3B82F6);
}

.category-card.dyscalculia .category-icon {
    background: var(--dyscalculia-bg, #ECFDF5);
    color: var(--dyscalculia-color, #10B981);
}

.category-card.dysgraphia .category-icon {
    background: var(--dysgraphia-bg, #FFFBEB);
    color: var(--dysgraphia-color, #F59E0B);
}

.category-card.dyspraxia .category-icon {
    background: var(--dyspraxia-bg, #FEF2F2);
    color: var(--dyspraxia-color, #EF4444);
}

.category-card.parents .category-icon {
    background: #FCE7F3;
    color: #EC4899;
}

.category-card.educators .category-icon {
    background: #E0E7FF;
    color: #6366F1;
}

.category-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary, #1e293b);
    margin: 0 0 0.25rem 0;
}

.category-card p {
    font-size: 0.813rem;
    color: var(--text-secondary, #64748b);
    margin: 0 0 0.5rem 0;
}

.category-card .count {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary-blue, #3B82F6);
}

/* Articles Section */
.articles-section {
    margin-bottom: 2rem;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.view-all-btn {
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Article Card */
.article-card {
    background: var(--bg-primary, #fff);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color, #e2e8f0);
    transition: all 0.2s;
}

.article-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.article-image {
    height: 160px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, #818CF8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.article-image i {
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.5);
}

.article-content {
    padding: 1.25rem;
}

.article-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    margin-bottom: 0.75rem;
}

.article-tag.dyslexia {
    background: var(--dyslexia-bg);
    color: var(--dyslexia-color);
}

.article-tag.dyscalculia {
    background: var(--dyscalculia-bg);
    color: var(--dyscalculia-color);
}

.article-tag.dysgraphia {
    background: var(--dysgraphia-bg);
    color: var(--dysgraphia-color);
}

.article-tag.dyspraxia {
    background: var(--dyspraxia-bg);
    color: var(--dyspraxia-color);
}

.article-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 0.5rem 0;
    color: var(--text-primary);
    line-height: 1.4;
}

.article-content h3 a {
    color: inherit;
    text-decoration: none;
}

.article-content h3 a:hover {
    color: var(--primary-blue);
}

.article-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0 0 1rem 0;
    line-height: 1.5;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Tools Section */
.tools-section {
    margin-bottom: 2rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.tool-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    text-decoration: none;
    transition: all 0.2s;
}

.tool-card:hover {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-md);
}

.tool-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--primary-blue);
    flex-shrink: 0;
}

.tool-info h3 {
    font-size: 0.938rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
}

.tool-info p {
    font-size: 0.813rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Featured Resources */
.featured-section {
    background: linear-gradient(135deg, #1E293B 0%, #334155 100%);
    border-radius: 16px;
    padding: 2rem;
    color: white;
    margin-bottom: 2rem;
}

.featured-section h2 {
    font-size: 1.25rem;
    margin: 0 0 1.5rem 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.featured-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
}

.featured-card h3 {
    font-size: 1rem;
    margin: 0 0 0.5rem 0;
}

.featured-card p {
    font-size: 0.875rem;
    opacity: 0.8;
    margin: 0 0 1rem 0;
}

.featured-card .btn {
    background: white;
    color: var(--text-primary);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

/* Responsive */
@media (max-width: 1024px) {
    .app-container .sidebar {
        transform: translateX(-100%);
        z-index: 1000;
    }
    
    .app-container .sidebar.open {
        transform: translateX(0);
    }
    
    .app-container .main-content {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: block;
    }
}

@media (max-width: 768px) {
    .hub-hero {
        padding: 1.5rem;
    }
    
    .hub-hero h1 {
        font-size: 1.5rem;
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .search-wrapper {
        display: none;
    }
}