:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --background-color: #ffffff;
    --surface-color: #f8fafc;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --code-background: #f1f5f9;
    --sidebar-width: 280px;
}

[data-theme="dark"] {
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --text-color: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --code-background: #1e293b;
}

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

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

.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    padding: 2rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.sidebar-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.nav-menu {
    padding: 1rem 0;
}

.nav-menu a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

.nav-menu a:hover {
    background-color: var(--code-background);
    border-left-color: var(--primary-color);
}

.nav-menu a.active {
    background-color: var(--code-background);
    border-left-color: var(--primary-color);
    font-weight: 600;
}

.content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
    max-width: calc(100vw - var(--sidebar-width));
}

.content-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.content-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.breadcrumb {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.markdown-content {
    max-width: none;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.25;
}

.markdown-content h1 { font-size: 2rem; }
.markdown-content h2 { font-size: 1.5rem; }
.markdown-content h3 { font-size: 1.25rem; }
.markdown-content h4 { font-size: 1.125rem; }

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

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

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

.markdown-content code {
    background-color: var(--code-background);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

.markdown-content pre {
    background-color: var(--code-background);
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

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

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

.markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.markdown-content th,
.markdown-content td {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    text-align: left;
}

.markdown-content th {
    background-color: var(--surface-color);
    font-weight: 600;
}

.content-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.875rem;
    text-align: center;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .content {
        margin-left: 0;
        max-width: 100vw;
    }
}