/**
 * Modern Blog Design
 * Fortune Writers - Professional Academic Blog
 */

/* ==========================================
   BLOG HEADER
   ========================================== */

.blog-header {
    background: var(--color-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: var(--space-4) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.blog-header .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.blog-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
}

.blog-logo img {
    height: 40px;
}

.blog-nav {
    display: flex;
    gap: var(--space-6);
}

.blog-nav a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--font-medium);
    transition: color var(--transition-base);
}

.blog-nav a:hover {
    color: var(--color-primary);
}

/* ==========================================
   HERO SECTION - ENHANCED
   ========================================== */

.blog-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    padding: var(--space-12) 0 var(--space-16);
    text-align: center;
    position: relative;
    overflow: hidden;
    margin-top: -20px;
}

.blog-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.blog-hero .container {
    position: relative;
    z-index: 1;
}

.blog-hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: var(--font-extrabold);
    color: var(--color-white);
    margin-bottom: var(--space-3);
    line-height: 1.1;
    animation: fadeInUp 0.6s ease-out;
}

.blog-hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--space-6);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.6s ease-out 0.2s backwards;
}

/* Enhanced Search */
.blog-search {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    gap: var(--space-2);
    background: var(--color-white);
    padding: var(--space-2);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.6s ease-out 0.4s backwards;
}

.blog-search input {
    flex: 1;
    border: none;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
    background: var(--color-gray-50);
}

.blog-search input:focus {
    outline: none;
    background: var(--color-white);
    box-shadow: 0 0 0 2px var(--color-primary);
}

.blog-search button {
    padding: var(--space-3) var(--space-6);
    background: var(--color-secondary);
    color: var(--color-primary);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
}

.blog-search button:hover {
    background: var(--color-secondary-dark);
    transform: translateY(-2px);
}

/* ==========================================
   FILTER BAR
   ========================================== */

.blog-filter-bar {
    background: var(--color-white);
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 72px;
    z-index: 90;
}

.blog-filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.filter-categories {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--space-2) var(--space-4);
    border: 2px solid var(--color-gray-300);
    background: var(--color-white);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.filter-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.filter-sort {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.filter-sort select {
    padding: var(--space-2) var(--space-4);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    cursor: pointer;
}

/* ==========================================
   FEATURED POST
   ========================================== */

.featured-post-section {
    padding: var(--space-16) 0;
    background: var(--color-gray-50);
}

.featured-post {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-12);
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-base);
}

.featured-post:hover {
    box-shadow: var(--shadow-2xl);
    transform: translateY(-5px);
}

.featured-post-image {
    position: relative;
    overflow: hidden;
}

.featured-post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.featured-post:hover .featured-post-image img {
    transform: scale(1.05);
}

.featured-badge {
    position: absolute;
    top: var(--space-6);
    left: var(--space-6);
    background: var(--color-secondary);
    color: var(--color-primary);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--font-bold);
    text-transform: uppercase;
    box-shadow: var(--shadow-md);
}

.featured-post-content {
    padding: var(--space-8);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.featured-category {
    display: inline-block;
    color: var(--color-secondary);
    font-weight: var(--font-semibold);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-3);
}

.featured-post-content h2 {
    font-size: var(--text-3xl);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
    line-height: 1.3;
}

.featured-post-content h2 a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

.featured-post-content h2 a:hover {
    color: var(--color-secondary);
}

.featured-post-excerpt {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.featured-post-meta {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.meta-item i {
    color: var(--color-primary);
}

/* ==========================================
   BLOG LAYOUT
   ========================================== */

.blog-content {
    padding: var(--space-16) 0;
    background: var(--color-white);
}

.blog-layout {
    display: grid;
    grid-template-columns: 2.5fr 1fr;
    gap: var(--space-12);
}

/* ==========================================
   POST CARDS - ENHANCED
   ========================================== */

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-8);
}

.post-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-200);
    display: flex;
    flex-direction: column;
}

.post-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
    border-color: var(--color-primary);
}

.post-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.post-card:hover .post-image img {
    transform: scale(1.1);
}

.post-category {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-bold);
    text-transform: uppercase;
}

.post-content {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.post-meta {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.post-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.post-meta i {
    color: var(--color-primary);
}

.post-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-3);
    line-height: 1.4;
}

.post-title a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.post-title a:hover {
    color: var(--color-secondary);
}

.post-excerpt {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
    flex: 1;
}

.post-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-gray-200);
}

.post-author {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
}

.author-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-bold);
}

.reading-time {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-primary);
    font-weight: var(--font-semibold);
    text-decoration: none;
    transition: all var(--transition-base);
}

.read-more:hover {
    color: var(--color-secondary);
    gap: var(--space-3);
}

/* ==========================================
   SIDEBAR - ENHANCED
   ========================================== */

.blog-sidebar {
    position: sticky;
    top: 150px;
    height: fit-content;
}

.sidebar-widget {
    background: var(--color-white);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    border: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
}

.sidebar-widget h3 {
    font-size: var(--text-lg);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
    font-weight: var(--font-bold);
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--color-secondary);
}

.category-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-list li {
    margin-bottom: var(--space-2);
}

.category-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3);
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    font-weight: var(--font-medium);
}

.category-list a:hover {
    background: var(--color-gray-50);
    color: var(--color-primary);
    padding-left: var(--space-4);
}

.category-list a.active {
    background: var(--color-primary);
    color: var(--color-white);
}

.category-list span {
    background: var(--color-gray-200);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
}

.category-list a.active span {
    background: var(--color-secondary);
    color: var(--color-primary);
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.newsletter-form input {
    padding: var(--space-3);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.newsletter-form button {
    width: 100%;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tag-cloud a {
    display: inline-block;
    padding: var(--space-2) var(--space-3);
    background: var(--color-gray-100);
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    transition: all var(--transition-base);
}

.tag-cloud a:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

/* ==========================================
   PAGINATION
   ========================================== */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-3);
    margin-top: var(--space-12);
}

.pagination-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--color-white);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--font-medium);
    transition: all var(--transition-base);
}

.pagination-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-white);
}

.pagination-numbers {
    display: flex;
    gap: var(--space-2);
}

.pagination-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--font-medium);
    transition: all var(--transition-base);
}

.pagination-number:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.pagination-number.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

/* ==========================================
   EMPTY STATE
   ========================================== */

.empty-state {
    text-align: center;
    padding: var(--space-20) var(--space-4);
}

.empty-state i {
    color: var(--color-gray-400);
    margin-bottom: var(--space-6);
}

.empty-state h3 {
    font-size: var(--text-2xl);
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.empty-state p {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
}

/* ==========================================
   ANIMATIONS
   ========================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

@media (max-width: 1024px) {
    .blog-layout {
        grid-template-columns: 1fr;
    }
    
    .blog-sidebar {
        position: static;
    }
    
    .featured-post {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .blog-hero {
        padding: var(--space-10) 0 var(--space-12);
        margin-top: -10px;
    }
    
    .blog-hero h1 {
        font-size: var(--text-3xl);
        margin-bottom: var(--space-2);
    }
    
    .blog-hero p {
        font-size: var(--text-base);
        margin-bottom: var(--space-4);
    }
    
    .posts-grid {
        grid-template-columns: 1fr;
    }
    
    .blog-filters {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
    
    .pagination-numbers {
        order: 3;
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .blog-header {
        padding: var(--space-3) 0;
    }
    
    .blog-nav {
        gap: var(--space-3);
        font-size: var(--text-sm);
    }
    
    .blog-search {
        flex-direction: column;
    }
    
    .blog-search button {
        width: 100%;
    }
}