/* =====================================================
   CSS Reset and Base Styles
   ===================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* =====================================================
   CSS Variables for Light and Dark Themes
   ===================================================== */
:root {
    /* Light theme colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-sidebar: #f6f8fa;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --link-color: #0969da;
    --link-hover: #0550ae;
    --border-color: #d0d7de;
    --code-bg: #f6f8fa;
    --code-border: #d0d7de;
    --highlight-bg: #fff8c5;
}

[data-theme="dark"] {
    /* Dark theme colors - GitHub dark theme inspired */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-sidebar: #161b22;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --link-color: #58a6ff;
    --link-hover: #79c0ff;
    --border-color: #30363d;
    --code-bg: #161b22;
    --code-border: #30363d;
    --highlight-bg: #1f6feb;
}

/* =====================================================
   Base Typography
   ===================================================== */
html {
    font-size: 16px;
    line-height: 1.6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* =====================================================
   Layout
   ===================================================== */
.container {
    display: flex;
    min-height: 100vh;
}

/* =====================================================
   Sidebar Navigation
   ===================================================== */
.sidebar {
    width: 280px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: background-color 0.3s ease;
}

.sidebar-header {
    margin-bottom: 2rem;
    position: relative;
}

.logo-link {
    display: block;
    margin-bottom: 1rem;
}

.sidebar-logo {
    width: 100%;
    max-width: 200px;
    height: auto;
    display: block;
}

.sidebar-header h1 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.sidebar-header h1 a {
    color: var(--text-primary);
    text-decoration: none;
}

.sidebar-header h1 a:hover {
    color: var(--link-color);
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* Theme toggle button */
.theme-toggle {
    position: absolute;
    top: 0;
    right: 0;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem;
    cursor: pointer;
    font-size: 1.2rem;
    transition: border-color 0.2s ease;
}

.theme-toggle:hover {
    border-color: var(--link-color);
}

/* Navigation */
.nav-section {
    margin-bottom: 1.5rem;
}

.nav-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-link {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 0;
    font-size: 0.9375rem;
    transition: color 0.2s ease;
}

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

.nav-link.active {
    color: var(--link-color);
    font-weight: 500;
}

.nav-list {
    list-style: none;
    margin-top: 0.5rem;
}

.nav-list li {
    margin-left: 0;
}

.nav-list .nav-link {
    padding-left: 1rem;
    border-left: 2px solid transparent;
}

.nav-list .nav-link:hover {
    border-left-color: var(--border-color);
}

.nav-list .nav-link.active {
    border-left-color: var(--link-color);
}

/* =====================================================
   Main Content
   ===================================================== */
.content {
    flex: 1;
    margin-left: 280px;
    padding: 3rem;
    max-width: 900px;
}

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

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Article Content */
article {
    line-height: 1.7;
}

article h1, 
article h2, 
article h3, 
article h4, 
article h5, 
article h6 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

article h1 { font-size: 2rem; }
article h2 { font-size: 1.5rem; }
article h3 { font-size: 1.25rem; }
article h4 { font-size: 1.1rem; }

article p {
    margin-bottom: 1rem;
}

article a {
    color: var(--link-color);
    text-decoration: none;
}

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

article ul,
article ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

article li {
    margin-bottom: 0.5rem;
}

/* Code blocks */
article code {
    background-color: var(--code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.875rem;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

article pre {
    background-color: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 6px;
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

article pre code {
    background-color: transparent;
    padding: 0;
    border-radius: 0;
}

/* Tables */
article table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

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

article table th {
    background-color: var(--bg-secondary);
    font-weight: 600;
}

/* Blockquotes */
article blockquote {
    border-left: 4px solid var(--border-color);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

/* =====================================================
   Footer
   ===================================================== */
.page-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.page-footer a {
    color: var(--link-color);
    text-decoration: none;
}

.page-footer a:hover {
    text-decoration: underline;
}

/* =====================================================
   Responsive Design
   ===================================================== */
@media (max-width: 768px) {
    .sidebar {
        position: relative;
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .content {
        margin-left: 0;
        padding: 1.5rem;
    }
    
    .container {
        flex-direction: column;
    }
}

/* =====================================================
   Syntax Highlighting (Rouge)
   ===================================================== */
.highlight {
    background-color: var(--code-bg);
    border-radius: 6px;
}

.highlight pre {
    border: none;
}

/* Add basic syntax highlighting colors */
[data-theme="dark"] .highlight .c { color: #8b949e; } /* Comment */
[data-theme="dark"] .highlight .k { color: #ff7b72; } /* Keyword */
[data-theme="dark"] .highlight .s { color: #a5d6ff; } /* String */
[data-theme="dark"] .highlight .n { color: #c9d1d9; } /* Name */
[data-theme="dark"] .highlight .nf { color: #d2a8ff; } /* Function */

.highlight .c { color: #6a737d; } /* Comment */
.highlight .k { color: #d73a49; } /* Keyword */
.highlight .s { color: #032f62; } /* String */
.highlight .n { color: #24292f; } /* Name */
.highlight .nf { color: #6f42c1; } /* Function */