@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;1,400&family=Source+Sans+3:wght@300;400;600&display=swap');

:root {
    --color-ink: #507f31;
    --color-paper: #eef9f3;
    --color-accent: #c84630;
    --color-muted: #6b6b6b;
    --color-border: #d4d4d4;
    --color-hover: #a83826;
    
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Source Sans 3', -apple-system, sans-serif;
    
    --sidebar-width: 280px;
    --header-height: 200px;
    --max-width: 1400px;
    --spacing-unit: 1.5rem;
}

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

body {
    font-family: var(--font-sans);
    font-size: 17px;
    line-height: 1.7;
    color: var(--color-ink);
    background: var(--color-paper);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Header */
.site-header {
    height: var(--header-height);
    border-bottom: 3px solid var(--color-ink);
    background: var(--color-paper);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    height: 100%;
    padding: 0 var(--spacing-unit);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-link {
    display: block;
    height: var(--header-height);
    padding: var(--spacing-unit) 0;
}

.site-logo {
    height: 100%;
    width: auto;
    object-fit: contain;
    transition: opacity 0.3s ease;
}

.site-logo:hover {
    opacity: 0.8;
}

.site-logo-text {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: calc(var(--header-height) - 3rem);
    color: var(--color-ink);
    letter-spacing: -0.02em;
    transition: color 0.3s ease;
}

.site-logo-text:hover {
    color: var(--color-accent);
}

.main-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-ink);
    text-decoration: none;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

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

.nav-link:hover::after {
    width: 100%;
}

/* Layout */
.layout-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr var(--sidebar-width);
    gap: 3rem;
    padding: 3rem var(--spacing-unit);
    min-height: calc(100vh - var(--header-height) - 150px);
}

.main-content {
    min-width: 0;
}

.sidebar {
    position: sticky;
    top: calc(var(--header-height) + 2rem);
    height: fit-content;
    max-height: calc(100vh - var(--header-height) - 4rem);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.sidebar-section {
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-section:last-child {
    border-bottom: none;
}

.sidebar-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-ink);
}

.sidebar-content {
    font-size: 0.9rem;
    color: var(--color-muted);
    line-height: 1.6;
}

.category-list,
.social-links,
.link-list {
    list-style: none;
}

.category-list li,
.social-links li,
.link-list li {
    margin-bottom: 0.5rem;
}

.category-list a,
.social-links a,
.link-list a {
    color: var(--color-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    display: inline-block;
}

.category-list a:hover,
.social-links a:hover,
.link-list a:hover {
    color: var(--color-accent);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-cloud .tag {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: var(--color-ink);
    color: var(--color-paper);
    text-decoration: none;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.tag-cloud .tag:hover {
    background: var(--color-accent);
    transform: translateY(-2px);
}

/* Articles Grid */
.articles-grid {
    display: grid;
    gap: 3rem;
}

.article-card {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 2.5rem;
    animation: fadeInUp 0.6s ease backwards;
}

.article-card:nth-child(1) { animation-delay: 0.1s; }
.article-card:nth-child(2) { animation-delay: 0.2s; }
.article-card:nth-child(3) { animation-delay: 0.3s; }

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

.article-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.8rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.article-date {
    color: var(--color-muted);
}

.article-category {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

.article-category:hover {
    color: var(--color-hover);
}

.article-title {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.article-title a {
    color: var(--color-ink);
    text-decoration: none;
    transition: color 0.3s ease;
}

.article-title a:hover {
    color: var(--color-accent);
}

.article-summary {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-muted);
    margin-bottom: 1.5rem;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.read-more {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    text-decoration: none;
    position: relative;
    transition: transform 0.3s ease;
}

.read-more::after {
    content: ' →';
    transition: transform 0.3s ease;
    display: inline-block;
}

.read-more:hover::after {
    transform: translateX(4px);
}

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

.tag-pill {
    padding: 0.25rem 0.7rem;
    background: var(--color-paper);
    border: 1px solid var(--color-border);
    color: var(--color-muted);
    text-decoration: none;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.tag-pill:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Full Article */
.article-full,
.page-full {
    max-width: 750px;
    animation: fadeInUp 0.6s ease;
}

.article-header,
.page-header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--color-ink);
}

.article-full .article-title,
.page-title {
    font-size: 3rem;
    line-height: 1.15;
    margin-bottom: 1.5rem;
}

.article-author {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-muted);
    font-style: italic;
}

.article-content,
.page-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-content h2,
.article-content h3,
.article-content h4,
.page-content h2,
.page-content h3,
.page-content h4 {
    font-family: var(--font-serif);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.article-content h2,
.page-content h2 {
    font-size: 2rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.5rem;
}

.article-content h3,
.page-content h3 {
    font-size: 1.5rem;
}

.article-content p,
.page-content p {
    margin-bottom: 1.5rem;
}

.article-content a,
.page-content a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: color 0.3s ease;
}

.article-content a:hover,
.page-content a:hover {
    color: var(--color-hover);
}

.article-content img,
.page-content img {
    max-width: 100%;
    height: auto;
    margin: 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.article-content blockquote,
.page-content blockquote {
    margin: 2rem 0;
    padding-left: 2rem;
    border-left: 4px solid var(--color-accent);
    font-style: italic;
    color: var(--color-muted);
}

.article-content code,
.page-content code {
    background: #f5f5f5;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
    font-family: 'Monaco', 'Courier New', monospace;
}

.article-content pre,
.page-content pre {
    background: #1a1a1a;
    color: #f8f8f8;
    padding: 1.5rem;
    border-radius: 4px;
    overflow-x: auto;
    margin: 2rem 0;
}

.article-content pre code,
.page-content pre code {
    background: none;
    padding: 0;
}

.article-full .article-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 2px solid var(--color-ink);
}

.pagination-link {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.pagination-info {
    font-size: 0.9rem;
    color: var(--color-muted);
}

/* Archive */
.archive-header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--color-ink);
}

.archive-title {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 700;
}

/* Related Posts */
.related-posts {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 2px solid var(--color-ink);
}

.related-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

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

.related-card {
    padding: 1.5rem;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.related-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.related-card h4 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.related-card h4 a {
    color: var(--color-ink);
    text-decoration: none;
    transition: color 0.3s ease;
}

.related-card h4 a:hover {
    color: var(--color-accent);
}

.related-card time {
    font-size: 0.85rem;
    color: var(--color-muted);
}

/* Footer */
.site-footer {
    border-top: 3px solid var(--color-ink);
    background: var(--color-paper);
    padding: 2rem var(--spacing-unit);
    margin-top: 4rem;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.footer-content a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-content a:hover {
    color: var(--color-hover);
}

/* Responsive Design */
@media (max-width: 1200px) {
    :root {
        --sidebar-width: 240px;
    }
    
    .layout-container {
        gap: 2rem;
    }
}

@media (max-width: 992px) {
    :root {
        --header-height: 120px;
    }
    
    .site-header {
        height: auto;
        min-height: var(--header-height);
        background-color: black;
    }
    
    .header-container {
        flex-direction: column;
        padding: 1.5rem;
        gap: 1.5rem;
    }
    
    .logo-link {
        height: auto;
        padding: 0;
    }
    
    .site-logo {
        height: 80px;
    }
    
    .site-logo-text {
        font-size: 2.5rem;
        line-height: normal;
    }
    
    .main-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    .layout-container {
        grid-template-columns: 1fr;
        gap: 3rem;
        padding: 2rem var(--spacing-unit);
    }
    
    .sidebar {
        position: static;
        max-height: none;
        overflow-y: visible;
    }
    
    .sidebar-left {
        order: 2;
    }
    
    .main-content {
        order: 1;
    }
    
    .sidebar-right {
        order: 3;
    }
    
    .article-full,
    .page-full {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 16px;
    }
    
    .article-title {
        font-size: 1.8rem;
    }
    
    .article-full .article-title,
    .page-title,
    .archive-title {
        font-size: 2.2rem;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .pagination {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-unit: 1rem;
    }
    
    .site-logo-text {
        font-size: 2rem;
    }
    
    .nav-link {
        font-size: 0.85rem;
    }
    
    .article-title {
        font-size: 1.5rem;
    }
    
    .article-full .article-title,
    .page-title {
        font-size: 1.8rem;
    }
    
    .article-content,
    .page-content {
        font-size: 1rem;
    }
}