:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #ffffff;
    --sidebar-bg: #f8fafc;
    --text-color: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --code-bg: #f1f5f9;
    --code-border: #e2e8f0;
    --link-color: #2563eb;
    --link-hover: #1d4ed8;
    --sidebar-width: 280px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    padding: 2rem 0;
    z-index: 100;
}

.sidebar-header {
    padding: 0 1.5rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.sidebar-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.sidebar-header h1 a {
    color: inherit;
    text-decoration: none;
}

.sidebar-header h1 a:hover {
    opacity: 0.8;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.nav {
    padding: 0 1rem;
}

.nav ul {
    list-style: none;
}

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

.nav a {
    display: block;
    padding: 0.5rem 0.75rem;
    color: var(--text-color);
    text-decoration: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.nav a:hover {
    background-color: var(--bg-color);
    color: var(--primary-color);
}

.nav a.active {
    background-color: #dbeafe;
    color: var(--primary-color);
    font-weight: 500;
}

.nav .nav-level-1 > a {
    font-weight: 600;
    color: var(--text-color);
    margin-top: 0.75rem;
    margin-bottom: 0.5rem;
}

.nav .nav-level-1:first-child > a {
    margin-top: 0;
}

.nav .nav-level-2 {
    margin-left: 0.75rem;
}

.nav .nav-level-2 > a {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    padding-left: 1rem;
}

.nav .nav-level-3 {
    margin-left: 1rem;
}

.nav .nav-level-3 > a {
    font-size: 0.75rem;
    color: var(--text-secondary);
    padding-left: 1.25rem;
}

.nav-home {
    font-weight: 600;
    margin-bottom: 0.5rem;
    padding: 0.75rem 0.75rem !important;
    background-color: var(--bg-color);
    border-radius: 0.5rem;
}

.nav-section {
    margin-top: 1.5rem;
}

.nav-section:first-child {
    margin-top: 0.5rem;
}

.nav-section-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.5rem;
}

.nav-section ul {
    list-style: none;
    margin-left: 0;
}

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

.nav-section a {
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    display: block;
    color: var(--text-color);
    text-decoration: none;
    border-radius: 0.375rem;
    transition: all 0.2s;
}

.nav-section a:hover {
    background-color: var(--bg-color);
    color: var(--primary-color);
}

.nav-section a.active {
    background-color: #dbeafe;
    color: var(--primary-color);
    font-weight: 500;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    position: sticky;
    bottom: 0;
    background-color: var(--sidebar-bg);
}

.version {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Main Content */
.content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 2rem 3rem;
    max-width: 1200px;
}

.markdown-body {
    font-size: 1rem;
    line-height: 1.7;
}

.markdown-body h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-color);
}

.markdown-body h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-top: 1rem;
    color: var(--text-color);
    scroll-margin-top: 2rem;
}

.markdown-body h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
    scroll-margin-top: 2rem;
}

.markdown-body h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    scroll-margin-top: 2rem;
}

.markdown-body h5 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.markdown-body h6 {
    font-size: 1rem;
    font-weight: 600;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.markdown-body p {
    margin-bottom: 1rem;
    color: var(--text-color);
}

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

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

.markdown-body a {
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.markdown-body a:hover {
    border-bottom-color: var(--link-color);
}

.markdown-body code {
    background-color: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 0.25rem;
    padding: 0.125rem 0.375rem;
    font-size: 0.875em;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    color: #e11d48;
}

.markdown-body pre {
    background-color: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 0.5rem;
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.markdown-body pre code {
    background-color: transparent;
    border: none;
    padding: 0;
    color: var(--text-color);
    font-size: 0.875rem;
}

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

.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

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

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

.markdown-body table tr:nth-child(even) {
    background-color: var(--sidebar-bg);
}

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

.markdown-body .mermaid {
    margin: 2rem 0;
    text-align: center;
    background-color: var(--bg-color);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    overflow-x: auto;
    overflow-y: hidden;
}

.markdown-body .mermaid svg {
    max-width: 100%;
    height: auto;
}

/* Ensure sequence diagrams are properly sized */
.markdown-body .mermaid .sequence-diagram {
    width: 100%;
    overflow-x: auto;
}

.markdown-body img {
    max-width: 100%;
    height: auto;
    border-radius: 0.5rem;
    margin: 1rem 0;
}

/* Page Navigation */
.page-navigation {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-navigation a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    transition: all 0.2s;
}

.page-navigation a:hover {
    background-color: var(--sidebar-bg);
    border-color: var(--primary-color);
}

.page-navigation .page-nav {
    display: flex;
    gap: 1rem;
    align-items: center;
    width: 100%;
    justify-content: space-between;
}

.page-navigation .page-nav a {
    flex: 1;
    text-align: center;
}

.page-navigation .page-nav a:first-child {
    text-align: left;
}

.page-navigation .page-nav a:last-child {
    text-align: right;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .content {
        margin-left: 0;
        padding: 1rem;
    }

    .markdown-body h1 {
        font-size: 2rem;
    }

    .markdown-body h2 {
        font-size: 1.75rem;
    }

    .markdown-body h3 {
        font-size: 1.25rem;
    }
}

/* Print styles */
@media print {
    .sidebar {
        display: none;
    }

    .content {
        margin-left: 0;
    }
}