:root {
    /* Color Palette - Dark Theme */
    --color-bg-primary: #0a0e1a;
    --color-bg-secondary: #151b2e;
    --color-bg-tertiary: #1e2739;
    --color-surface: rgba(30, 39, 57, 0.6);
    --color-surface-glass: rgba(255, 255, 255, 0.05);

    /* Brand Colors */
    --color-brand-primary: #6366f1;
    --color-brand-secondary: #8b5cf6;
    --color-brand-accent: #f59e0b;

    /* Text Colors */
    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;

    /* Semantic Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-medium: 0.25s ease;

    /* Sidebar */
    --sidebar-width: 280px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.7;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--color-bg-secondary);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
}

.sidebar-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    color: var(--color-text-primary);
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    font-size: 1.5rem;
}

.version-badge {
    background: var(--color-brand-primary);
    color: white;
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.sidebar-search {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.sidebar-search input {
    width: 100%;
    padding: 0.6rem 0.75rem 0.6rem 2.25rem;
    background: var(--color-bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.875rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

.sidebar-search input:focus {
    border-color: var(--color-brand-primary);
}

.sidebar-search input::placeholder {
    color: var(--color-text-muted);
}

.search-icon {
    position: absolute;
    left: calc(var(--spacing-md) + 0.6rem);
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.9rem;
    opacity: 0.5;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm) 0;
}

.nav-section {
    padding: var(--spacing-xs) 0;
}

.nav-section-title {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
}

.nav-item {
    display: block;
    padding: 0.5rem var(--spacing-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav-item:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.nav-item.active {
    color: var(--color-brand-primary);
    background: rgba(99, 102, 241, 0.1);
    border-left-color: var(--color-brand-primary);
}

.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-footer .footer-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.sidebar-footer .footer-link:hover {
    color: var(--color-brand-accent);
}

/* ============================================
   MOBILE HEADER
   ============================================ */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 99;
    align-items: center;
    padding: 0 var(--spacing-md);
    gap: var(--spacing-sm);
}

.menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.mobile-logo {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 1rem;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

/* ============================================
   DOCUMENT SECTIONS
   ============================================ */
.doc-section {
    padding-bottom: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.doc-section:last-of-type {
    border-bottom: none;
}

.doc-section h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #ffffff 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.doc-section h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.doc-section h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.doc-section h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.doc-section p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.lead {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   STYLED LISTS
   ============================================ */
.styled-list {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.styled-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
}

.styled-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-brand-primary);
    font-weight: bold;
}

ol.styled-list {
    counter-reset: item;
}

ol.styled-list li::before {
    content: counter(item) ".";
    counter-increment: item;
}

/* ============================================
   FEATURE GRID & CARDS
   ============================================ */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.feature-card {
    background: var(--color-surface-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-medium);
}

.feature-card:hover {
    border-color: var(--color-brand-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.feature-card h4 {
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.feature-card p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 0;
}

/* ============================================
   INFO GRID & CARDS
   ============================================ */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.info-card {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.info-card h4 {
    color: var(--color-brand-secondary);
    margin-bottom: var(--spacing-xs);
}

.info-card ul {
    list-style: none;
}

.info-card li {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    padding: 0.25rem 0;
}

/* ============================================
   CALLOUTS
   ============================================ */
.callout {
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin: var(--spacing-md) 0;
    border-left: 4px solid;
}

.callout h4 {
    margin-bottom: var(--spacing-xs);
}

.callout p {
    margin-bottom: 0;
}

.callout-info {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--color-info);
}

.callout-tip {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--color-success);
}

.callout-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--color-warning);
}

.callout-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--color-success);
}

/* ============================================
   STEP CARDS
   ============================================ */
.step-card {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.step-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--gradient-hero);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
}

.step-content h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-xs);
}

.step-content ol,
.step-content ul {
    margin-bottom: 0;
    padding-left: 1.25rem;
}

.step-content li {
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

/* ============================================
   TABLES
   ============================================ */
.styled-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
    font-size: 0.9rem;
}

.styled-table th,
.styled-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.styled-table th {
    background: var(--color-bg-tertiary);
    font-weight: 600;
    color: var(--color-text-primary);
}

.styled-table td {
    color: var(--color-text-secondary);
}

.styled-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* ============================================
   CODE BLOCKS & INLINE CODE
   ============================================ */
code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
    background: var(--color-bg-tertiary);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
    color: var(--color-brand-accent);
}

.code-block {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    margin: var(--spacing-md) 0;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.copy-btn {
    background: var(--color-brand-primary);
    color: white;
    border: none;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.copy-btn:hover {
    background: var(--color-brand-secondary);
}

.code-block pre {
    padding: 1rem;
    overflow-x: auto;
    margin: 0;
}

.code-block code {
    background: none;
    padding: 0;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
}

.code-inline-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: var(--spacing-sm) 0;
}

/* ============================================
   KEYBOARD KEYS
   ============================================ */
kbd {
    display: inline-block;
    padding: 0.15rem 0.4rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8em;
    background: var(--color-bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.3);
}

/* ============================================
   FAQ / ACCORDION
   ============================================ */
.faq-item {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
}

.faq-item summary {
    padding: var(--spacing-md);
    cursor: pointer;
    font-weight: 500;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--color-brand-primary);
    transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-content {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--color-text-secondary);
}

.faq-content ol {
    padding-left: 1.25rem;
}

.faq-content li {
    margin-bottom: 0.25rem;
}

/* ============================================
   FOOTER
   ============================================ */
.content-footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--color-text-muted);
}

.content-footer p {
    margin-bottom: var(--spacing-xs);
}

.footer-note {
    font-size: 0.9rem;
}

.footer-version {
    font-size: 0.8rem;
    opacity: 0.7;
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: var(--gradient-hero);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-medium);
    box-shadow: var(--shadow-md);
    z-index: 50;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-medium);
    }

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

    .mobile-header {
        display: flex;
    }

    .content {
        margin-left: 0;
        padding-top: 60px;
    }

    .content-wrapper {
        padding: var(--spacing-md);
    }
}

@media (max-width: 600px) {
    .doc-section h1 {
        font-size: 1.75rem;
    }

    .doc-section h2 {
        font-size: 1.25rem;
    }

    .feature-grid {
        grid-template-columns: 1fr 1fr;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .step-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .styled-table {
        font-size: 0.8rem;
    }

    .styled-table th,
    .styled-table td {
        padding: 0.5rem;
    }
}