:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --border: #30363d;
    --code-bg: #161b22;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

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

.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo h1 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.logo p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.nav-section {
    margin-bottom: 2rem;
}

.nav-section h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.nav-section ul {
    list-style: none;
}

.nav-section ul li {
    margin-bottom: 0.5rem;
}

.nav-section ul li a {
    color: var(--text-primary);
    text-decoration: none;
    display: block;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    transition: all 0.2s;
}

.nav-section ul li a:hover {
    background-color: var(--bg-tertiary);
    color: var(--accent-hover);
}

.content {
    margin-left: 280px;
    padding: 3rem;
    flex: 1;
    max-width: 1200px;
}

#page-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

#page-content h2 {
    font-size: 1.75rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

#page-content h3 {
    font-size: 1.25rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

#page-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

#page-content ul {
    margin-bottom: 1rem;
    margin-left: 1.5rem;
}

#page-content ul li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

#page-content a {
    color: var(--accent);
    text-decoration: none;
}

#page-content a:hover {
    text-decoration: underline;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.card h3 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.highlight-section {
    background-color: var(--bg-secondary);
    border-left: 4px solid var(--accent);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 4px;
}

.highlight-section h2 {
    margin-top: 0;
    border: none;
}

pre {
    background-color: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem;
    overflow-x: auto;
    margin: 1rem 0;
}

code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.resource-link {
    display: block;
    background-color: var(--bg-secondary);
    padding: 1rem;
    margin: 0.5rem 0;
    border-radius: 6px;
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s;
}

.resource-link:hover {
    border-color: var(--accent);
    background-color: var(--bg-tertiary);
}

.resource-link h4 {
    margin-bottom: 0.25rem;
    color: var(--accent);
}

.resource-link p {
    font-size: 0.875rem;
    margin: 0;
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
    }

    .content {
        margin-left: 0;
        padding: 1.5rem;
    }
}