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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --text-color: #1e293b;
    --text-light: #64748b;
    --bg-color: #ffffff;
    --bg-secondary: #f8fafc;
    --border-color: #e2e8f0;
    --sidebar-bg: #f8fafc;
    --sidebar-width: 280px;
    --accent-green: #10b981;
    --accent-amber: #f59e0b;
    --accent-red: #ef4444;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: all 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    display: block;
    letter-spacing: -0.5px;
}

.logo-subtitle {
    font-size: 12px;
    color: var(--text-light);
    font-weight: 400;
    margin-top: 4px;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 24px;
}

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-light);
    padding: 0 20px;
    margin-bottom: 8px;
}

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

.nav-link {
    display: block;
    padding: 10px 20px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background-color: rgba(37, 99, 235, 0.05);
    color: var(--primary-color);
}

.nav-link.active {
    background-color: rgba(37, 99, 235, 0.08);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 500;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.quick-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.quick-link:hover {
    background-color: var(--primary-hover);
    text-decoration: none;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 40px 60px;
    max-width: 1200px;
}

.content-wrapper {
    max-width: 800px;
}

.markdown-content h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.markdown-content h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-color);
    margin-top: 40px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.markdown-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
    margin-top: 32px;
    margin-bottom: 12px;
}

.markdown-content h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
    margin-top: 24px;
    margin-bottom: 8px;
}

.markdown-content p {
    margin-bottom: 16px;
    line-height: 1.7;
    color: var(--text-color);
}

.markdown-content a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

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

.markdown-content ul, .markdown-content ol {
    margin-bottom: 20px;
    padding-left: 24px;
}

.markdown-content li {
    margin-bottom: 8px;
}

.markdown-content code {
    background-color: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Menlo, Consolas, 'Courier New', monospace;
    font-size: 14px;
    color: #e11d48;
}

.markdown-content pre {
    background-color: #1e293b;
    color: #e2e8f0;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
}

.markdown-content pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: 14px;
    line-height: 1.5;
}

.markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background-color: var(--bg-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.markdown-content td, .markdown-content th {
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    text-align: left;
}

.markdown-content th {
    background-color: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-color);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.markdown-content td {
    color: var(--text-color);
    font-size: 14px;
}

.markdown-content tr:nth-child(even) {
    background-color: var(--bg-secondary);
}

.markdown-content tr:hover {
    background-color: rgba(37, 99, 235, 0.04);
}

.markdown-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 20px;
    margin: 24px 0;
    color: var(--text-light);
    font-style: italic;
    background-color: var(--bg-secondary);
    padding: 16px 20px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.markdown-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 40px 0;
}

.markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin: 20px 0;
}

.markdown-content strong {
    font-weight: 600;
    color: var(--text-color);
}

.markdown-content em {
    font-style: italic;
}

.markdown-content del {
    text-decoration: line-through;
    color: var(--text-light);
}

/* Info boxes */
.markdown-content .info-box {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin: 24px 0;
}

.markdown-content .info-box.note {
    background-color: #eff6ff;
    border-left: 4px solid var(--primary-color);
}

.markdown-content .info-box.note h4 {
    color: var(--primary-color);
    margin-top: 0;
}

.markdown-content .info-box.warning {
    background-color: #fef3c7;
    border-left: 4px solid var(--accent-amber);
}

.markdown-content .info-box.warning h4 {
    color: #b45309;
    margin-top: 0;
}

.markdown-content .info-box.tip {
    background-color: #ecfdf5;
    border-left: 4px solid var(--accent-green);
}

.markdown-content .info-box.tip h4 {
    color: #047857;
    margin-top: 0;
}

/* Responsive design */
@media (max-width: 1024px) {
    .main-content {
        padding: 32px 40px;
    }
}

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

    .main-content {
        margin-left: 0;
        padding: 24px;
    }

    .container {
        flex-direction: column;
    }

    .markdown-content h1 {
        font-size: 28px;
    }

    .markdown-content h2 {
        font-size: 22px;
    }

    .markdown-content h3 {
        font-size: 18px;
    }
}