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

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent-color: #58a6ff;
    --accent-hover: #79b8ff;
    --border-color: #30363d;
    --success-color: #3fb950;
    --warning-color: #d29922;
}

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;
}

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

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

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

.sidebar-header h1 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

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

.nav-list {
    flex: 1;
    padding: 1rem;
}

.nav-list h2 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
}

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

.nav-list li {
    margin-bottom: 0.25rem;
}

.nav-list a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

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

.nav-list a.active {
    background-color: rgba(88, 166, 255, 0.15);
    color: var(--accent-color);
    font-weight: 500;
}

.nav-list a::before {
    content: '📄';
    font-size: 1rem;
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

.back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

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

/* Main Content */
.content {
    flex: 1;
    margin-left: 280px;
    padding: 2rem 3rem;
    max-width: 100%;
    min-height: 100vh;
}

/* Welcome Message */
.welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
}

.welcome h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.welcome p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.stats {
    background-color: var(--bg-secondary);
    padding: 1rem 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stats span {
    color: var(--accent-color);
    font-weight: 500;
}

/* Markdown Content Styles */
.markdown-body {
    max-width: 900px;
    background-color: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.markdown-body h1 {
    font-size: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.markdown-body h2 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3rem;
}

.markdown-body h3 {
    font-size: 1.25rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

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

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

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

.markdown-body code {
    background-color: var(--bg-tertiary);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.875em;
}

.markdown-body pre {
    background-color: var(--bg-primary);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

.markdown-body pre code {
    background-color: transparent;
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.5;
}

.markdown-body a {
    color: var(--accent-color);
    text-decoration: none;
}

.markdown-body a:hover {
    text-decoration: underline;
}

.markdown-body blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-secondary);
    background-color: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 0 8px 8px 0;
}

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

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

.markdown-body th {
    background-color: var(--bg-tertiary);
    font-weight: 600;
}

.markdown-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.markdown-body hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

/* Loading state */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--text-secondary);
}

.loading::after {
    content: '';
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 0.5rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Error state */
.error {
    background-color: rgba(248, 81, 73, 0.1);
    border: 1px solid #f85149;
    padding: 1rem;
    border-radius: 8px;
    color: #f85149;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .wiki-container {
        flex-direction: column;
    }

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

    .markdown-body {
        padding: 1.5rem;
    }
}