/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-light: #f9fafb;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-color);
    font-weight: 500;
    font-size: 1rem;
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 24px;
    height: 3px;
    background: var(--text-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto;
}

/* Blog Section */
.blog-section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    text-align: center;
    color: var(--text-color);
}

/* Blog List View (Simple) */
.blog-list {
    max-width: 900px;
    margin: 0 auto;
}

.blog-list-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.blog-list-item:hover {
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.blog-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.blog-list-category {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.blog-list-date {
    font-size: 0.875rem;
    color: var(--text-light);
}

.blog-list-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.blog-list-title a {
    color: var(--text-color);
    transition: var(--transition);
}

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

.blog-list-excerpt {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.blog-list-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 1rem;
}

.blog-list-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-light);
}

.blog-list-author {
    font-weight: 500;
}

.blog-list-separator {
    color: var(--border-color);
}

.blog-list-link {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    transition: var(--transition);
}

.blog-list-link:hover {
    gap: 0.5rem;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.blog-card {
    background: var(--bg-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.blog-card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.blog-card-category {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.blog-card-content {
    padding: 1.5rem;
}

.blog-card-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.blog-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.blog-card-title a {
    color: var(--text-color);
}

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

.blog-card-excerpt {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.blog-card-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.tag {
    background: var(--bg-light);
    color: var(--text-light);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
}

.blog-card-link {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Blog Detail Page */
.blog-detail {
    padding: 2rem 0;
}

.breadcrumb {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.breadcrumb a {
    color: var(--primary-color);
}

.blog-detail-header {
    margin-bottom: 2rem;
}

.blog-detail-category {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.blog-detail-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.blog-detail-meta {
    display: flex;
    gap: 1.5rem;
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.blog-detail-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.blog-detail-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.blog-detail-image {
    margin-bottom: 2rem;
    border-radius: 12px;
    overflow: hidden;
}

.blog-detail-image img {
    width: 100%;
    height: auto;
}

.blog-detail-content {
    width: 100%;
    margin: 0;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-color);
}

.blog-detail-content p {
    margin-bottom: 1.5rem;
}

.blog-detail-content h2,
.blog-detail-content h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.blog-detail-footer {
    width: 100%;
    margin: 3rem 0 0;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
}

.related-posts {
    padding: 4rem 0;
    background: var(--bg-light);
}

/* Footer */
.footer {
    background: var(--text-color);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    font-weight: 700;
}

.footer-section p {
    color: #d1d5db;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #d1d5db;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .blog-detail-title {
        font-size: 2rem;
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .blog-detail-content {
        font-size: 1rem;
    }

    .blog-list-item {
        padding: 1.5rem;
    }

    .blog-list-title {
        font-size: 1.25rem;
    }

    .blog-list-footer {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 0;
    }

    .blog-section {
        padding: 2rem 0;
    }

    .related-posts {
        padding: 2rem 0;
    }

    .blog-list-item {
        padding: 1rem;
    }

    .blog-list-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Category Page Styles */
.category-hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 4rem 0 3rem;
    text-align: center;
}

.category-hero .breadcrumb {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1rem;
}

.category-hero .breadcrumb a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
}

.category-hero .breadcrumb a:hover {
    color: white;
}

.category-title {
    font-size: 3rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.category-subtitle {
    font-size: 1.25rem;
    margin: 0;
    opacity: 0.9;
}

.no-posts {
    text-align: center;
    padding: 4rem 0;
}

.empty-state h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.empty-state p {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: background 0.2s;
}

.btn:hover {
    background: var(--secondary-color);
    color: white;
}

@media (max-width: 768px) {
    .category-title {
        font-size: 2rem;
    }
    
    .category-subtitle {
        font-size: 1rem;
    }
    
    .category-hero {
        padding: 2rem 0;
    }
}