:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-secondary: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: static;
    z-index: 100;
    margin-bottom: 0.2rem;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.2rem 2rem;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

nav h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1rem;
}

nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem;
}

.hero {
    text-align: left;
    padding: 1rem 1rem;
    background: white;
    color: black;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 0.3rem;
}

.hero h2 {
    font-size: 1.5rem;
    margin-bottom: 0.3rem;
    color: black;
}

.hero p {
    font-size: 0.9rem;
    color: #4a4a4a;
    font-style: italic;
    font-family: 'Georgia', serif;
}

.home-content {
    text-align: left;
    padding: 1rem 1rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 0.3rem;
}

.home-content h2 {
    font-size: 1.5rem;
    margin-bottom: 0.3rem;
    color: black;
}

.home-content p {
    font-size: 0.9rem;
    color: #4a4a4a;
    font-family: 'Georgia', serif;
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.post-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

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

.post-card-content {
    padding: 1rem;
}

.post-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
    color: var(--text-color);
}

.post-card h3 a {
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition);
}

.post-card h3 a:hover {
    color: var(--primary-color);
}

.post-card .post-meta {
    color: var(--text-light);
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
}

.post-card .post-excerpt {
    color: var(--text-color);
    margin-bottom: 0.5rem;
    line-height: 1.4;
    font-size: 0.9rem;
}

.post-card .read-more {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.85rem;
}

.post-card .read-more:hover {
    color: var(--secondary-color);
}

.post-single {
    max-width: 600px;
    margin: 0 auto;
}

.post-single h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.post-meta {
    display: flex;
    gap: 1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

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

.tag {
    background-color: var(--bg-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 16px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.post-content {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.post-content h2 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    color: var(--text-color);
}

.post-content h3 {
    font-size: 1.4rem;
    margin: 1.5rem 0 0.75rem;
    color: var(--text-color);
}

.post-content p {
    margin-bottom: 1rem;
}

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

.post-content a:hover {
    text-decoration: underline;
}

.post-content ul,
.post-content ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.post-content li {
    margin-bottom: 0.5rem;
}

.post-content code {
    background-color: var(--bg-secondary);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.post-content pre {
    background-color: var(--bg-secondary);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.post-content pre code {
    background-color: transparent;
    padding: 0;
}

.post-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin-left: 0;
    color: var(--text-light);
    font-style: italic;
}

.social-share {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.social-share h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.share-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.share-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    color: white;
}

.share-btn.twitter {
    background-color: #1da1f2;
}

.share-btn.facebook {
    background-color: #1877f2;
}

.share-btn.linkedin {
    background-color: #0a66c2;
}

.share-btn:hover {
    opacity: 0.8;
    transform: translateY(-2px);
}

.related-posts {
    margin-bottom: 2rem;
}

.related-posts h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.related-post {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.related-post:last-child {
    border-bottom: none;
}

.related-post h4 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

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

.related-post a:hover {
    color: var(--primary-color);
}

.related-post .post-date {
    color: var(--text-light);
    font-size: 0.9rem;
}

.comments-section {
    margin-top: 2rem;
}

.comments-section h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

.footer-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem;
    text-align: center;
}

.footer-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.8rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.social-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary-color);
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 1rem;
    }

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

    .hero h2 {
        font-size: 2rem;
    }

    .post-single h1 {
        font-size: 2rem;
    }

    .share-buttons {
        flex-direction: column;
    }

    .share-btn {
        width: 100%;
    }
}