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

:root {
    /* Light theme colors */
    --color-bg: #fff;
    --color-text: #333;
    --color-text-muted: #7f8c8d;
    --color-text-light: #555;
    --color-heading: #2c3e50;
    --color-primary: #3498db;
    --color-primary-hover: #2980b9;
    --color-border: #eee;
    --color-code-bg: #f8f9fa;
    --color-code-text: #e83e8c;
    --color-code-block-text: #333;
    --color-tag-bg: #ecf0f1;
    --color-quote-bg: #f8f9fa;
    --color-muted-heading: #95a5a6;
    --color-no-posts-code: #2c3e50;
    --color-no-posts-bg: #ecf0f1;
}

:root[data-theme="dark"] {
    /* Dark theme colors */
    --color-bg: #1a1a1a;
    --color-text: #e0e0e0;
    --color-text-muted: #a0a0a0;
    --color-text-light: #c0c0c0;
    --color-heading: #ffffff;
    --color-primary: #4fa8d8;
    --color-primary-hover: #6bb6e0;
    --color-border: #333;
    --color-code-bg: #2a2a2a;
    --color-code-text: #ff6b9d;
    --color-code-block-text: #e0e0e0;
    --color-tag-bg: #333;
    --color-quote-bg: #2a2a2a;
    --color-muted-heading: #777;
    --color-no-posts-code: #ffffff;
    --color-no-posts-bg: #333;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        /* Dark theme colors */
        --color-bg: #1a1a1a;
        --color-text: #e0e0e0;
        --color-text-muted: #a0a0a0;
        --color-text-light: #c0c0c0;
        --color-heading: #ffffff;
        --color-primary: #4fa8d8;
        --color-primary-hover: #6bb6e0;
        --color-border: #333;
        --color-code-bg: #2a2a2a;
        --color-code-text: #ff6b9d;
        --color-code-block-text: #e0e0e0;
        --color-tag-bg: #333;
        --color-quote-bg: #2a2a2a;
        --color-muted-heading: #777;
        --color-no-posts-code: #ffffff;
        --color-no-posts-bg: #333;
    }
}

html {
    font-size: 16px;
    line-height: 1.6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Layout */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding: 2rem 0;
}

/* Header */
.site-header {
    padding: 2rem 0 1rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2rem;
}

.site-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-heading);
}

.site-header p {
    color: var(--color-text-muted);
    font-style: italic;
}

/* Menu */
.site-menu {
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2rem;
}

.site-menu p {
    margin: 0;
    text-align: center;
}

.site-menu a,
.site-menu button {
    color: var(--color-text);
    text-decoration: none;
    padding: 0.5rem 1rem;
    margin: 0 0.25rem;
    border-radius: 4px;
    transition: all 0.2s ease;
    display: inline-block;
}

.site-menu button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-family: inherit;
    line-height: inherit;
    vertical-align: baseline;
}

.site-menu a:hover,
.site-menu button:hover {
    background-color: var(--color-primary);
    color: white;
    text-decoration: none;
}

.site-menu a:visited {
    color: var(--color-text);
}

.site-menu a:visited:hover {
    color: white;
}

/* Footer */
.site-footer {
    padding: 2rem 0;
    border-top: 1px solid var(--color-border);
    margin-top: 2rem;
    text-align: center;
    color: var(--color-text-muted);
}

.site-version {
    display: block;
    margin-top: 0.4rem;
    font-size: 0.75rem;
    opacity: 0.6;
    font-family: monospace;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin: 1.5rem 0 1rem;
    color: var(--color-heading);
    line-height: 1.3;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin: 1rem 0;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

/* Posts Grid */
.posts-grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 3rem;
}

.post-preview {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

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

.post-title {
    margin: 0 0 0.5rem;
    font-size: 1.5rem;
}

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

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

.post-meta {
    margin: 0.5rem 0 1rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.post-meta time {
    margin-right: 1rem;
}

.post-author:before {
    content: " • ";
    margin-right: 0.5rem;
}

.post-excerpt {
    margin: 1rem 0;
    color: var(--color-text-light);
    line-height: 1.6;
}

.read-more {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 500;
    margin-top: 0.5rem;
}

/* Single Post */
.post {
    max-width: none;
}

.post-header {
    margin-bottom: 2rem;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1.5rem;
}

.post-header .post-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--color-heading);
}

.post-content {
    margin: 2rem 0;
    line-height: 1.7;
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 1rem 0;
}

.post-tags {
    margin: 2rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--color-border);
}

.tag {
    display: inline-block;
    background: var(--color-tag-bg);
    color: var(--color-heading);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    margin: 0.25rem 0.5rem 0.25rem 0;
}

.post-navigation {
    margin: 3rem 0 2rem;
    text-align: center;
}

.back-to-home {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--color-primary);
    color: white;
    border-radius: 4px;
    text-decoration: none;
    transition: background-color 0.2s ease;
}

.back-to-home:hover {
    background: var(--color-primary-hover);
    text-decoration: none;
    color: white;
}

/* Code blocks */
pre, code {
    font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
    font-size: 0.9rem;
}

code {
    background: var(--color-code-bg);
    color: var(--color-code-text);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
}

pre {
    background: var(--color-code-bg);
    color: var(--color-code-block-text);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin: 1.5rem 0;
    border-left: 4px solid var(--color-primary);
}

pre code {
    background: none;
    color: inherit;
    padding: 0;
}

/* Lists */
ul, ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

li {
    margin: 0.5rem 0;
}

/* Blockquotes */
blockquote {
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    border-left: 4px solid var(--color-primary);
    background: var(--color-quote-bg);
    font-style: italic;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 3rem 0 2rem;
    padding: 1rem 0;
    border-top: 1px solid var(--color-border);
}

.pagination-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--color-primary);
    color: white;
    border-radius: 4px;
    text-decoration: none;
    transition: background-color 0.2s ease;
}

.pagination-link:hover {
    background: var(--color-primary-hover);
    color: white;
    text-decoration: none;
}

.pagination-info {
    color: var(--color-text-muted);
    font-weight: 500;
}

/* No posts message */
.no-posts {
    text-align: center;
    padding: 4rem 0;
    color: var(--color-text-muted);
}

.no-posts h2 {
    margin-bottom: 1rem;
    color: var(--color-muted-heading);
}

.no-posts code {
    background: var(--color-no-posts-bg);
    color: var(--color-no-posts-code);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .site-header h1 {
        font-size: 2rem;
    }
    
    .post-header .post-title {
        font-size: 2rem;
    }
    
    .pagination {
        flex-direction: column;
        gap: 1rem;
    }
    
    .pagination-info {
        order: 1;
    }
    
    .pagination-link {
        width: 100%;
        text-align: center;
    }
    
    .pagination-link.prev {
        order: 2;
    }
    
    .pagination-link.next {
        order: 3;
    }
    
    pre {
        padding: 0.75rem;
        font-size: 0.8rem;
    }
}

/* Print styles */
@media print {
    .site-header,
    .site-footer,
    .post-navigation,
    .pagination {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    a {
        color: #000;
        text-decoration: none;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}