/**
 * SIGMIX Learn Hub Styles v2.0
 * /css/learn.css
 * Mobile-first educational content display
 */

/* ============================================
   1. CSS VARIABLES
   ============================================ */
:root {
    --primary: #070078;
    --primary-light: #1a1a8c;
    --accent: #10B981;
    --dark: #1a1a2e;
    --gray: #6B7280;
    --gray-light: #9CA3AF;
    --gray-200: #E5E7EB;
    --off-white: #F9FAFB;
    --white: #FFFFFF;
}

/* ============================================
   2. UTILITIES & LAYOUT
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

.header-spacer {
    height: 70px;
}

/* ============================================
   3. BREADCRUMB NAVIGATION - CRITICAL
   ============================================ */
.breadcrumb-nav {
    background: var(--off-white);
    border-bottom: 1px solid var(--gray-200);
    padding: 0.75rem 0;
    margin-top: 70px; /* Push below fixed header */
    position: relative;
    z-index: 50;
}

.breadcrumb-nav .container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

ol.breadcrumb-list {
    display: flex !important;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    list-style: none !important;
    list-style-type: none !important;
    margin: 0 !important;
    padding: 0 !important;
    font-size: 0.875rem;
    color: var(--gray);
}

.breadcrumb-list li {
    display: inline-flex !important;
    align-items: center;
    gap: 0;
    list-style: none !important;
    margin: 0 !important;
    padding: 0 !important;
}

.breadcrumb-list li::before {
    display: none !important;
    content: none !important;
}

.breadcrumb-list li:not(:last-child)::after {
    content: '/';
    color: var(--gray-light);
    font-weight: 400;
    margin: 0 0.5rem;
    display: inline-block;
}

.breadcrumb-list a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.2s ease;
    display: inline-block;
}

.breadcrumb-list a:hover,
.breadcrumb-list a:focus {
    color: var(--primary);
}

.breadcrumb-list li[aria-current="page"] span {
    color: var(--dark);
    font-weight: 600;
    display: inline-block;
}

.breadcrumb-list meta {
    display: none !important;
}

/* ============================================
   4. SECONDARY NAV
   ============================================ */
.secondary-nav {
    background: var(--off-white);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 70px;
    z-index: 100;
}

.secondary-nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.5rem 1rem;
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    scrollbar-width: none;
}

.secondary-nav-container::-webkit-scrollbar {
    display: none;
}

.secondary-nav a {
    color: var(--gray);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    white-space: nowrap;
    transition: all 0.2s;
}

.secondary-nav a:hover,
.secondary-nav a.active {
    color: var(--primary);
    background: rgba(7,0,120,0.08);
}

.nav-separator {
    color: var(--gray-light);
    margin: 0 0.5rem;
    user-select: none;
    font-weight: 400;
}

.current-category {
    color: var(--dark);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.current-category i {
    color: var(--primary);
    font-size: 0.9rem;
}

/* ============================================
   5. HERO SECTION
   ============================================ */
.learn-hero {
    padding: 2rem 0;
    background: linear-gradient(135deg, var(--off-white) 0%, #EEF2FF 100%);
    border-bottom: 1px solid var(--gray-200);
}

.hero-inner {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hero-text {
    text-align: center;
}

.hero-text h1 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.hero-text h1 span {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1rem;
    color: var(--gray);
    margin-bottom: 1rem;
}

.hero-stats-inline {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    font-size: 0.85rem;
    color: var(--dark);
    font-weight: 600;
}

.hero-stats-inline i {
    color: var(--primary);
    margin-right: 0.3rem;
}

/* ============================================
   6. SEARCH
   ============================================ */
.hero-search {
    max-width: 100%;
}

.search-container {
    position: relative;
}

.search-box {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 2.75rem;
    font-size: 1rem;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    outline: none;
    font-family: inherit;
    background: white;
}

.search-box:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(7,0,120,0.1);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

.search-results {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    max-height: 70vh;
    overflow-y: auto;
    display: none;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    z-index: 200;
}

.search-results.active {
    display: block;
}

.search-result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    text-decoration: none;
    color: inherit;
    border-bottom: 1px solid var(--gray-200);
    transition: background 0.2s;
}

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

.search-result-item:hover {
    background: var(--off-white);
}

.search-result-info {
    flex: 1;
    min-width: 0;
}

.search-result-category {
    font-size: 0.7rem;
    color: var(--primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: block;
    margin-bottom: 0.2rem;
}

.search-result-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--dark);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-result-meta {
    font-size: 0.75rem;
    color: var(--gray);
    white-space: nowrap;
}

.search-no-results {
    padding: 1.5rem;
    text-align: center;
    color: var(--gray);
}

/* ============================================
   7. SECTION HEADERS
   ============================================ */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.section-header h2 {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-header h2 i {
    color: var(--primary);
    font-size: 0.95rem;
}

.view-all-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.view-all-link:hover {
    text-decoration: underline;
}

/* ============================================
   8. CATEGORIES GRID
   ============================================ */
.categories-section {
    padding: 2rem 0;
    background: white;
}

.categories-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.category-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--off-white);
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s;
}

.category-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(7,0,120,0.1);
}

.category-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.category-icon i {
    color: white;
    font-size: 1.25rem;
}

.category-content {
    flex: 1;
    min-width: 0;
}

.category-content h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.category-content p {
    font-size: 0.85rem;
    color: var(--gray);
    line-height: 1.4;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.category-count {
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 600;
}

/* ============================================
   9. ARTICLES GRID
   ============================================ */
.articles-section {
    padding: 2rem 0;
    background: var(--off-white);
}

.articles-section.articles-alt {
    background: white;
}

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.article-card {
    display: block;
    padding: 1.25rem;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s;
}

.articles-alt .article-card {
    background: var(--off-white);
}

.article-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(7,0,120,0.1);
}

.article-category {
    font-size: 0.7rem;
    color: var(--primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.article-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.4;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 4rem;
}

.article-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--gray);
}

.article-meta i {
    margin-right: 0.25rem;
}

/* ============================================
   10. QUICK START
   ============================================ */
.quickstart-section {
    padding: 2rem 0;
    background: linear-gradient(135deg, var(--primary) 0%, #1a1a5c 100%);
}

.quickstart-section .section-header h2 {
    color: white;
}

.quickstart-section .section-header h2 i {
    color: var(--accent);
}

.quickstart-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.quickstart-step {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 12px;
    padding: 1.5rem;
    position: relative;
}

.step-number {
    width: 36px;
    height: 36px;
    background: var(--accent);
    color: white;
    font-size: 1rem;
    font-weight: 800;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.quickstart-step h3 {
    font-size: 1rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.5rem;
}

.quickstart-step p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.8);
    line-height: 1.5;
    margin-bottom: 1rem;
}

.step-link {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.step-link:hover {
    text-decoration: underline;
}

/* ============================================
   11. FAQ
   ============================================ */
.faq-section {
    padding: 2rem 0;
    background: var(--off-white);
}

.faq-section h2 {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.faq-section h2 i {
    color: var(--primary);
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.faq-item {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    padding: 1.25rem;
}

.faq-item h3 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.faq-item p {
    font-size: 0.85rem;
    color: var(--gray);
    line-height: 1.6;
}

.faq-item a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.faq-item a:hover {
    text-decoration: underline;
}

/* ============================================
   12. CTA
   ============================================ */
.cta-section {
    padding: 2rem 0;
    background: linear-gradient(135deg, var(--dark) 0%, #0f0f23 100%);
}

.cta-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
}

.cta-text {
    color: white;
}

.cta-text h2 {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.cta-text p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
    max-width: 280px;
}

.cta-btn-primary,
.cta-btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.cta-btn-primary {
    background: var(--accent);
    color: white;
}

.cta-btn-primary:hover {
    background: #0ea271;
}

.cta-btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(255,255,255,0.4);
}

.cta-btn-secondary:hover {
    border-color: white;
    background: rgba(255,255,255,0.1);
}

/* ============================================
   13. RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 640px) {
    .breadcrumb-nav {
        padding: 0.5rem 0;
    }
    
    ol.breadcrumb-list {
        font-size: 0.8rem;
    }
    
    .nav-separator {
        margin: 0 0.25rem;
    }
    
    .current-category {
        font-size: 0.85rem;
    }
}

@media (min-width: 480px) {
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quickstart-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .hero-inner {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .hero-text {
        text-align: left;
        flex: 1;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-stats-inline {
        justify-content: flex-start;
    }
    
    .hero-search {
        width: 320px;
        flex-shrink: 0;
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .articles-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .quickstart-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .faq-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cta-inner {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
    
    .cta-buttons {
        flex-direction: row;
        max-width: none;
        width: auto;
    }
}

@media (min-width: 1024px) {
    .categories-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .faq-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .category-card {
        padding: 1.5rem;
    }
    
    .category-icon {
        width: 56px;
        height: 56px;
    }
    
    .category-icon i {
        font-size: 1.5rem;
    }
}

@media (min-width: 1280px) {
    .hero-text h1 {
        font-size: 2.25rem;
    }
    
    .section-header h2 {
        font-size: 1.25rem;
    }
    
    .categories-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}



/* ============================================
   14. FOOTER VISIBILITY FIX
   ============================================ */
.articles-section,
.categories-section,
.quickstart-section,
.faq-section {
    position: relative;
    clear: both;
    overflow: visible;
    margin-bottom: 0;
}

.articles-grid,
.categories-grid,
.quickstart-grid,
.faq-grid {
    position: relative;
    z-index: 1;
    margin-bottom: 0;
    overflow: visible;
}

.cta-section {
    position: relative;
    z-index: 10;
    clear: both;
}

/* Ensure footer is always visible */
footer {
    position: relative;
    z-index: 20;
    clear: both;
}