/* ===== BLOG SPECIFIC STYLES ===== */

/* ===== BLOG HERO ===== */
.blog-hero {
    background: linear-gradient(135deg, #34495e 0%, #2c3e50 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.blog-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="blog-pattern" width="40" height="40" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1" fill="%23fff" opacity="0.1"/><circle cx="5" cy="5" r="0.5" fill="%23fff" opacity="0.08"/><circle cx="35" cy="15" r="0.8" fill="%23fff" opacity="0.06"/></pattern></defs><rect width="100" height="100" fill="url(%23blog-pattern)"/></svg>');
    pointer-events: none;
}

.blog-hero .hero-title {
    color: white;
}

.blog-hero .hero-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.blog-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.blog-stats .stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    min-width: 120px;
}

.blog-stats .stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--spacing-xs);
}

.blog-stats .stat-label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== FILTER SECTION ===== */
.filter-section {
    padding: var(--spacing-xl) 0;
    background: white;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: var(--header-height);
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.filter-container {
    text-align: center;
}

.filter-container h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
    font-size: var(--font-size-sm);
}

.filter-btn:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--gradient-primary);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--shadow-light);
}

@media (max-width: 768px) {
    .filter-buttons {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
        max-width: 400px;
        margin: 0 auto;
    }
    
    .filter-btn {
        padding: var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
}

/* ===== ARTICLES SECTION ===== */
.articles-section {
    padding: var(--spacing-xxl) 0;
    background: var(--surface-color);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.article-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 5px 20px var(--shadow-light);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    opacity: 1;
    transform: translateY(0);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px var(--shadow-medium);
}

.article-card.hidden {
    display: none;
}

.article-image {
    height: 120px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    position: relative;
}

.article-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.article-content {
    padding: var(--spacing-lg);
}

.article-category {
    display: inline-block;
    background: var(--secondary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-content h3 {
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.article-content h3 a {
    color: var(--primary-color);
    font-weight: 600;
    font-size: var(--font-size-lg);
    transition: var(--transition);
    text-decoration: none;
}

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

.article-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    font-size: var(--font-size-sm);
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-xs);
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.article-author {
    font-weight: 600;
    color: var(--primary-color);
}

.article-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    background: var(--surface-color);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.tag:hover {
    background: var(--primary-color);
    color: white;
    cursor: pointer;
}

/* ===== LOAD MORE SECTION ===== */
.load-more-section {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.load-more-section .btn {
    margin-bottom: var(--spacing-md);
    min-width: 200px;
}

.articles-count {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.articles-count span {
    font-weight: 600;
    color: var(--primary-color);
}

/* ===== NEWSLETTER SECTION ===== */
.newsletter-section {
    padding: var(--spacing-xxl) 0;
    background: var(--gradient-primary);
    color: white;
}

.newsletter-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.newsletter-text h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
    color: white;
}

.newsletter-text p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

.newsletter-form-element {
    display: flex;
    gap: var(--spacing-sm);
    background: white;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.newsletter-form-element input {
    flex: 1;
    border: none;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    border-radius: var(--border-radius);
    outline: none;
    background: transparent;
    color: var(--primary-color);
}

.newsletter-form-element input::placeholder {
    color: var(--text-light);
}

.newsletter-form-element .btn {
    border-radius: var(--border-radius);
    white-space: nowrap;
}

@media (max-width: 768px) {
    .newsletter-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .newsletter-form-element {
        flex-direction: column;
        padding: var(--spacing-md);
    }
    
    .newsletter-form-element input {
        margin-bottom: var(--spacing-sm);
    }
}

/* ===== FILTER ANIMATIONS ===== */
.article-card {
    transition: all 0.3s ease;
}

.article-card.fade-out {
    opacity: 0;
    transform: scale(0.95);
}

.article-card.fade-in {
    opacity: 1;
    transform: scale(1);
}

/* ===== SEARCH FUNCTIONALITY (Future Enhancement) ===== */
.search-section {
    padding: var(--spacing-lg) 0;
    background: white;
    border-bottom: 1px solid var(--border-color);
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-base);
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.1);
}

.search-icon {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: var(--font-size-lg);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .articles-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .article-card {
        margin-bottom: var(--spacing-md);
    }
    
    .article-content {
        padding: var(--spacing-md);
    }
    
    .blog-stats {
        gap: var(--spacing-md);
    }
    
    .blog-stats .stat-item {
        min-width: 100px;
        padding: var(--spacing-sm);
    }
    
    .blog-stats .stat-number {
        font-size: var(--font-size-2xl);
    }
}

@media (max-width: 480px) {
    .filter-section {
        padding: var(--spacing-md) 0;
    }
    
    .filter-container h3 {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-sm);
    }
    
    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .newsletter-text h3 {
        font-size: var(--font-size-xl);
    }
    
    .newsletter-text p {
        font-size: var(--font-size-base);
    }
}

/* ===== LOADING STATES ===== */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== NO RESULTS STATE ===== */
.no-results {
    text-align: center;
    padding: var(--spacing-xxl);
    color: var(--text-secondary);
}

.no-results h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.no-results p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.no-results .btn {
    margin-top: var(--spacing-md);
}

/* ===== ACCESSIBILITY ===== */
.filter-btn:focus,
.search-input:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

.article-card:focus-within {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
    .filter-section,
    .newsletter-section,
    .load-more-section {
        display: none;
    }
    
    .article-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
        margin-bottom: var(--spacing-md);
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
}