/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

/* Site Header */
.site-header {
    background: #2c3e50;
    color: white;
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.site-title {
    color: white;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
}

.site-title:hover {
    opacity: 0.9;
}

/* Hamburger menu */
.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    font-size: 2rem;
    cursor: pointer;
    color: white;
    padding: 0 0.5rem;
}

/* Container layout */
.container {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    gap: 2rem;
}

/* Sidebar Navigation */
.sidebar {
    flex: 0 0 280px;
    position: sticky;
    top: 70px;
    height: calc(100vh - 70px);
    overflow-y: auto;
    padding: 1.5rem;
    background: white;
    border-right: 1px solid #e0e0e0;
}

.site-nav ul {
    list-style: none;
    padding-left: 0;
}

.site-nav ul ul {
    padding-left: 1rem;
    margin-top: 0.25rem;
}

.site-nav li {
    margin: 0.25rem 0;
}

.site-nav a {
    color: #333;
    text-decoration: none;
    display: block;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.site-nav a:hover {
    background: #f0f0f0;
    color: #3498db;
}

.site-nav a.active {
    background: #3498db;
    color: white;
}

.site-nav details.nav-folder {
    margin: 0;
}

.site-nav details.nav-folder > summary {
    cursor: pointer;
    list-style: none;
    user-select: none;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    transition: background 0.2s;
}

.site-nav details.nav-folder > summary::-webkit-details-marker {
    display: none;
}

.site-nav details.nav-folder > summary::before {
    content: '▶';
    display: inline-block;
    width: 1em;
    margin-right: 0.25rem;
    transition: transform 0.2s;
    font-size: 0.75em;
}

.site-nav details.nav-folder[open] > summary::before {
    transform: rotate(90deg);
}

.site-nav details.nav-folder > summary:hover {
    background: #f0f0f0;
}

.site-nav details.nav-folder > summary > span,
.site-nav details.nav-folder > summary > a {
    display: inline;
    padding: 0;
}

.site-nav details.nav-folder > summary > a:hover {
    background: transparent;
    text-decoration: underline;
}

.site-nav details.nav-folder > ul {
    margin-top: 0.25rem;
}

/* Content area */
.content {
    flex: 1;
    min-width: 0;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

article {
    max-width: 800px;
}

/* Index page styles */
.index-header {
    padding: 3rem 2rem;
    text-align: center;
    border-bottom: 1px solid #e0e0e0;
}

.index-header h1 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.page-list {
    padding: 2rem;
}

.page-list h2 {
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

.page-list ul {
    list-style: none;
}

.page-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.page-list a {
    color: #3498db;
    text-decoration: none;
    display: block;
    padding: 0.5rem 0;
}

.page-list a:hover {
    color: #2980b9;
    background: #f8f9fa;
    padding-left: 1rem;
    transition: all 0.3s ease;
}

/* Article content */
.article-content {
    margin-top: 2rem;
}

.article-content h1 {
    font-size: 2rem;
    margin: 2rem 0 1rem;
    color: #2c3e50;
}

.article-content h2 {
    font-size: 1.5rem;
    margin: 1.5rem 0 1rem;
    color: #34495e;
}

.article-content h3 {
    font-size: 1.25rem;
    margin: 1.25rem 0 0.75rem;
    color: #34495e;
}

.article-content p {
    margin: 1rem 0;
}

.article-content a {
    color: #3498db;
    text-decoration: none;
}

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

.article-content ul, .article-content ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.article-content li {
    margin: 0.5rem 0;
}

.article-content blockquote {
    border-left: 4px solid #3498db;
    padding-left: 1rem;
    margin: 1.5rem 0;
    color: #666;
    font-style: italic;
    background: #f8f9fa;
    padding: 1rem;
}

.article-content pre {
    background: #2c3e50;
    color: #ecf0f1;
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin: 1rem 0;
}

.article-content code {
    background: #ecf0f1;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
}

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

.article-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1.5rem auto;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.article-content th, .article-content td {
    border: 1px solid #ddd;
    padding: 0.75rem;
    text-align: left;
}

.article-content th {
    background: #f8f9fa;
    font-weight: bold;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: #666;
    font-size: 0.9rem;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .nav-toggle-label {
        display: block;
    }
    
    .container {
        flex-direction: column;
        gap: 0;
    }
    
    .sidebar {
        position: fixed;
        top: 64px;
        left: 0;
        width: 280px;
        height: calc(100vh - 64px);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        border-right: none;
        box-shadow: 2px 0 8px rgba(0,0,0,0.1);
        z-index: 90;
    }
    
    .nav-toggle:checked ~ .container .sidebar {
        transform: translateX(0);
    }
    
    .content {
        margin: 1rem;
        padding: 1rem;
        border-radius: 4px;
    }
    
    article {
        max-width: 100%;
    }
    
    .index-header {
        padding: 2rem 1rem;
    }
    
    .article-content h1 {
        font-size: 1.75rem;
    }
    
    .article-content h2 {
        font-size: 1.35rem;
    }
    
    .article-content h3 {
        font-size: 1.15rem;
    }
}