/* Blog Styles */
.blog-header {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.blog-header::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 20"><defs><radialGradient id="a" cx="50%" cy="50%"><stop offset="0%" stop-color="rgba(255,255,255,.1)"/><stop offset="100%" stop-color="rgba(255,255,255,0)"/></radialGradient></defs><circle cx="10" cy="10" r="10" fill="url("#a#a")"><animateTransform attributeName="transform" type="translate" values="0 0;90 0;0 0" dur="10s" repeatCount="indefinite"/></circle></svg>') repeat-x;
    opacity: 0.1;
}

.blog-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #fff, #f0f8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.blog-subtitle {
    font-size: 1.3rem;
    opacity: 0.9;
    margin-bottom: 0;
}

.search-container {
    display: flex;
    justify-content: flex-end;
}

.search-box {
    position: relative;
    max-width: 400px;
    width: 100%;
}

.search-input {
    width: 100%;
    padding: 15px 60px 15px 20px;
    border: none;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    font-size: 1rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    background: white;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.search-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(45deg, #667eea, #764ba2);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-btn:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.filters-section {
    padding: 40px 0;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.filters-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-chip {
    padding: 8px 16px;
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s cubic-bezier(0.2, 0.9, 0.3, 1);
    user-select: none;
}

.filter-chip:hover {
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.filter-chip.active {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border-color: transparent;
    transform: scale(1.02);
}

.sort-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sort-select {
    padding: 8px 16px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    background: white;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sort-select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.blog-content {
    padding: 60px 0;
    min-height: 60vh;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

@supports not (display: grid) {
    .blog-grid {
        display: flex;
        flex-wrap: wrap;
        margin: -15px;
    }
    
    .blog-grid > * {
        flex: 1 1 350px;
        margin: 15px;
        max-width: calc(50% - 30px);
    }
    
    @media (max-width: 768px) {
        .blog-grid > * {
            max-width: 100%;
            flex: 1 1 100%;
        }
    }
}

.blog-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.2, 0.9, 0.3, 1);
    cursor: pointer;
    position: relative;
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.blog-card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(45deg, #f0f2f5, #e9ecef);
    position: relative;
    overflow: hidden;
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.blog-card:hover .blog-card-image img {
    transform: scale(1.05);
}

.blog-card-content {
    padding: 24px;
}

.blog-card-category {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.blog-card-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
    color: #2d3748;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-excerpt {
    color: #718096;
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid #e9ecef;
}

.blog-card-date {
    font-size: 0.85rem;
    color: #a0aec0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.blog-card-actions {
    display: flex;
    gap: 12px;
}

.like-btn, .share-btn {
    background: none;
    border: none;
    color: #a0aec0;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.9rem;
}

.like-btn:hover, .share-btn:hover {
    background: #f7fafc;
    color: #667eea;
}

.like-btn.liked {
    color: #e53e3e;
}

.like-btn.liked .heart-icon {
    animation: heartPop 0.3s ease;
}

@keyframes heartPop {
    0% { transform: scale(1); }
    50% { transform: scale(1.3) rotate(5deg); }
    100% { transform: scale(1); }
}

.pagination-container {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.pagination {
    display: flex;
    gap: 8px;
    align-items: center;
}

.page-btn {
    padding: 10px 16px;
    border: 2px solid #e9ecef;
    background: white;
    color: #4a5568;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.page-btn:hover {
    border-color: #667eea;
    color: #667eea;
}

.page-btn.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: #718096;
}

.empty-content i {
    font-size: 4rem;
    margin-bottom: 24px;
    opacity: 0.5;
}

.empty-content h3 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: #4a5568;
}

.suggested-topics {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.topic-tag {
    padding: 8px 16px;
    background: #e2e8f0;
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.topic-tag:hover {
    background: #667eea;
    color: white;
}

.featured-article .card {
    transition: all 0.3s ease;
    border: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.featured-article .card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.cta-btn {
    transition: all 0.2s ease;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

/* Loading States */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.skeleton-image {
    width: 100%;
    height: 200px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.skeleton-title {
    height: 24px;
    border-radius: 4px;
    margin-bottom: 12px;
}

.skeleton-text {
    height: 16px;
    border-radius: 4px;
    margin-bottom: 8px;
}

.skeleton-text:last-child {
    width: 70%;
}

.placeholder-bg {
    width: 100%;
    height: 200px;
    background: linear-gradient(45deg, #f0f2f5, #e9ecef);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #a0aec0;
    font-size: 2rem;
}

/* Mobile Filter Styles */
.mobile-filter-toggle {
    border-radius: 12px;
    padding: 12px 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 2px solid #e9ecef;
}

.mobile-filter-toggle:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
    border-color: #667eea;
}

.mobile-filter-toggle .fas.fa-chevron-down {
    transition: transform 0.3s ease;
}

.mobile-filter-toggle[aria-expanded="true"] {
    border-color: #667eea;
    background-color: #f8f9ff;
}

.mobile-filter-toggle[aria-expanded="true"] .fas.fa-chevron-down {
    transform: rotate(180deg);
}

.mobile-filters-container {
    background: white;
    border-radius: 12px;
    padding: 20px;
    margin-top: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
}

.mobile-category-select,
.mobile-sort-select {
    border-radius: 8px;
    padding: 12px 16px;
    border: 2px solid #e9ecef;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background: white;
}

.mobile-category-select:focus,
.mobile-sort-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    outline: none;
}

.apply-filters-btn {
    border-radius: 8px;
    padding: 12px;
    font-weight: 500;
    background: linear-gradient(45deg, #667eea, #764ba2);
    border: none;
    transition: all 0.3s ease;
}

.apply-filters-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

.results-info {
    padding: 10px 0;
    border-bottom: 1px solid #e9ecef;
    margin-bottom: 20px !important;
    font-size: 0.9rem;
    color: #6c757d;
}

#mobileFilterBtn {
    border-radius: 20px;
    padding: 6px 12px;
    font-size: 0.85rem;
    min-height: 32px;
}

/* Enhanced Responsive Design */
@media (max-width: 1400px) {
    .blog-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
}

@media (max-width: 1200px) {
    .blog-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 25px;
    }
    
    .filter-chip {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 992px) {
    .filters-section {
        padding: 30px 0;
    }
    
    .blog-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
    }
    
    .blog-card-image {
        height: 180px;
    }
}

@media (max-width: 768px) {
    .blog-title {
        font-size: 2.5rem;
    }
    
    .search-container {
        justify-content: center;
        margin-top: 30px;
    }
    
    .filters-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .category-filters {
        justify-content: center;
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .blog-card {
        max-width: 100%;
        margin: 0 auto 20px;
    }
    
    .blog-card-image {
        height: 200px;
    }
    
    .blog-card-content {
        padding: 20px;
    }
    
    .blog-card-title {
        font-size: 1.1rem;
        line-height: 1.4;
    }
    
    .blog-card-excerpt {
        font-size: 0.9rem;
        line-height: 1.5;
    }
    
    .blog-card-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .blog-card-actions {
        align-self: flex-end;
    }
    
    .filter-chip {
        font-size: 0.8rem;
        padding: 6px 12px;
        min-height: 36px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .results-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

@media (max-width: 576px) {
    .blog-header {
        padding: 80px 0 30px;
    }
    
    .blog-title {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .blog-subtitle {
        font-size: 1rem;
    }
    
    .search-input {
        padding: 12px 50px 12px 16px;
        font-size: 0.9rem;
    }
    
    .search-btn {
        width: 35px;
        height: 35px;
    }
    
    .mobile-filters-container {
        padding: 15px;
        margin-top: 10px;
    }
    
    .blog-card-image {
        height: 160px;
    }
    
    .blog-card-content {
        padding: 15px;
    }
    
    .blog-card-title {
        font-size: 1rem;
    }
    
    .blog-card-excerpt {
        font-size: 0.85rem;
        -webkit-line-clamp: 2;
    }
    
    .blog-card-date {
        font-size: 0.8rem;
    }
    
    .like-btn, .share-btn {
        padding: 6px 8px;
        font-size: 0.8rem;
        min-height: 36px;
        min-width: 36px;
    }
    
    .page-btn {
        padding: 8px 12px;
        font-size: 0.85rem;
        min-height: 36px;
        min-width: 36px;
    }
}

@media (max-width: 400px) {
    .blog-header {
        padding: 70px 0 25px;
    }
    
    .blog-title {
        font-size: 1.7rem;
    }
    
    .mobile-filter-toggle {
        padding: 10px 12px;
        font-size: 0.9rem;
    }
    
    .mobile-filters-container {
        padding: 12px;
    }
    
    .blog-card-image {
        height: 140px;
    }
    
    .blog-card-content {
        padding: 12px;
    }
    
    .blog-card-title {
        font-size: 0.95rem;
    }
    
    .blog-card-excerpt {
        font-size: 0.8rem;
    }
}

/* Performance Optimizations */
.blog-card {
    will-change: transform;
    backface-visibility: hidden;
}

@media (max-width: 768px) {
    .blog-card:hover {
        transform: translateY(-2px); /* Reduced transform for mobile */
    }
}

/* Touch-friendly interactions */
@media (hover: none) and (pointer: coarse) {
    .blog-card:hover {
        transform: none;
    }
    
    .blog-card:active {
        transform: scale(0.98);
        transition: transform 0.1s ease;
    }
    
    .filter-chip:active,
    .apply-filters-btn:active,
    .mobile-filter-toggle:active {
        transform: scale(0.95);
    }
}

/* Loading states */
.mobile-loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
    color: #6c757d;
}

.mobile-loading i {
    font-size: 2rem;
    animation: spin 1s linear infinite;
}

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

/* Improved empty state */
.empty-state-message {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Better focus states for accessibility */
.mobile-filter-toggle:focus,
.mobile-category-select:focus,
.mobile-sort-select:focus,
.apply-filters-btn:focus,
#mobileFilterBtn:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .blog-card {
        border: 2px solid;
    }
    
    .filter-chip {
        border-width: 2px;
    }
    
    .mobile-filter-toggle {
        border-width: 2px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus states for keyboard navigation */
.filter-chip:focus,
.search-input:focus,
.sort-select:focus,
.like-btn:focus,
.share-btn:focus,
.cta-btn:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

.blog-card:focus {
    outline: 2px solid #667eea;
    outline-offset: 4px;
}