/* ================================================================
   VECTOR Docs — Design System
   Background: #0A0A0A → #111111 → #1A1A1A → #262626
   Accent: #F59E0B (amber)
   Text: #F5F5F5 primary, #A3A3A3 secondary, #737373 muted
   ================================================================ */

:root {
    --bg-deepest: #0A0A0A;
    --bg-deep: #111111;
    --bg-mid: #1A1A1A;
    --bg-surface: #262626;
    --bg-hover: #333333;
    --accent: #F59E0B;
    --accent-dim: #D97706;
    --accent-glow: rgba(245, 158, 11, 0.15);
    --accent-glow-strong: rgba(245, 158, 11, 0.25);
    --text-primary: #F5F5F5;
    --text-secondary: #A3A3A3;
    --text-muted: #737373;
    --border: #333333;
    --border-subtle: #262626;
    --radius: 8px;
    --sidebar-width: 280px;
    --toc-width: 220px;
    --content-max: 800px;
    --header-height: 56px;
    --font-body: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', 'JetBrains Mono', ui-monospace, monospace;
    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
    font-family: var(--font-body);
    background: var(--bg-deepest);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

::selection {
    background: var(--accent-glow-strong);
    color: var(--text-primary);
}

/* ── Layout ── */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 100;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-deep);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    z-index: 200;
    overflow: hidden;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 150;
    opacity: 0;
    transition: opacity var(--transition);
}

.main-content {
    margin-left: var(--sidebar-width);
    margin-right: var(--toc-width);
    min-height: 100vh;
    padding: 48px 64px 96px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.content {
    max-width: var(--content-max);
    width: 100%;
}

.toc-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: var(--toc-width);
    padding: 48px 16px 24px;
    overflow-y: auto;
    scrollbar-width: none;
}

.toc-sidebar::-webkit-scrollbar { display: none; }

/* ── Sidebar Header ── */
.sidebar-header {
    padding: 20px 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: -0.02em;
}

.logo-icon { font-size: 1.25rem; }
.accent { color: var(--accent); }

.version-badge {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 2px 8px;
    border-radius: 99px;
    letter-spacing: 0.02em;
}

/* ── Search ── */
.search-container {
    padding: 16px 16px 0;
    flex-shrink: 0;
    position: relative;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 12px;
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 8px 40px 8px 36px;
    background: var(--bg-mid);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.search-shortcut {
    position: absolute;
    right: 10px;
    font-family: var(--font-body);
    font-size: 0.7rem;
    color: var(--text-muted);
    background: var(--bg-surface);
    padding: 1px 6px;
    border-radius: 4px;
    border: 1px solid var(--border);
    pointer-events: none;
}

.search-results {
    position: absolute;
    top: calc(100% + 4px);
    left: 16px;
    right: 16px;
    background: var(--bg-mid);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    max-height: 320px;
    overflow-y: auto;
    display: none;
    z-index: 300;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.search-results.active { display: block; }

.search-result-item {
    display: block;
    padding: 10px 14px;
    text-decoration: none;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition);
}

.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover,
.search-result-item.active { background: var(--accent-glow); }

.search-result-title {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.search-result-snippet {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-result-section {
    font-size: 0.65rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.search-no-results {
    padding: 16px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ── Sidebar Navigation ── */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 16px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.nav-section {
    margin-bottom: 4px;
}

.nav-section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 20px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
    transition: color var(--transition);
}

.nav-section-title:hover { color: var(--text-secondary); }

.nav-section-title .chevron {
    width: 14px;
    height: 14px;
    transition: transform var(--transition);
    flex-shrink: 0;
}

.nav-section.collapsed .chevron { transform: rotate(-90deg); }
.nav-section.collapsed .nav-items { display: none; }

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

.nav-item a {
    display: block;
    padding: 6px 20px 6px 24px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

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

.nav-item a.active {
    color: var(--accent);
    border-left-color: var(--accent);
    background: var(--accent-glow);
    font-weight: 500;
}

/* ── Sidebar Footer ── */
.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 6px;
    transition: color var(--transition), background var(--transition);
}

.sidebar-link:hover {
    color: var(--text-primary);
    background: var(--bg-surface);
}

/* ── Table of Contents ── */
.toc-header {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 12px;
}

.toc-nav a {
    display: block;
    padding: 4px 0 4px 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-decoration: none;
    border-left: 1px solid var(--border-subtle);
    transition: color var(--transition), border-color var(--transition);
    line-height: 1.5;
}

.toc-nav a:hover { color: var(--text-secondary); }

.toc-nav a.active {
    color: var(--accent);
    border-left-color: var(--accent);
}

.toc-nav a.toc-h3 { padding-left: 24px; font-size: 0.78rem; }

/* ── Typography ── */
.content h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-top: 48px;
    margin-bottom: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-primary);
}

.content h2:first-child,
.content h1 + h2 {
    border-top: none;
    margin-top: 0;
    padding-top: 0;
}

.content h3 {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.4;
    margin-top: 32px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.content h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.content p {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

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

.content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition);
}

.content a:hover { border-bottom-color: var(--accent); }

.content ul, .content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.content li {
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.content li strong { color: var(--text-primary); }

.content blockquote {
    margin: 24px 0;
    padding: 16px 20px;
    background: var(--accent-glow);
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--text-secondary);
}

.content blockquote p:last-child { margin-bottom: 0; }
.content blockquote strong { color: var(--accent); }

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

/* ── Tables ── */
.content table {
    width: 100%;
    margin: 16px 0 24px;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.content thead th {
    text-align: left;
    padding: 10px 14px;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    background: var(--bg-mid);
    border-bottom: 1px solid var(--border);
}

.content thead th:first-child { border-radius: var(--radius) 0 0 0; }
.content thead th:last-child { border-radius: 0 var(--radius) 0 0; }

.content tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
}

.content tbody tr:hover { background: rgba(255, 255, 255, 0.02); }
.content tbody td strong { color: var(--text-primary); }

/* ── Code Blocks ── */
.content code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--bg-mid);
    color: var(--accent);
    padding: 2px 6px;
    border-radius: 4px;
}

.content pre {
    position: relative;
    margin: 16px 0 24px;
    border-radius: var(--radius);
    overflow: hidden;
}

.content pre code {
    display: block;
    padding: 20px 24px;
    background: var(--bg-deep);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.content pre code::-webkit-scrollbar { height: 4px; }
.content pre code::-webkit-scrollbar-track { background: transparent; }
.content pre code::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* Copy button */
.copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-muted);
    padding: 4px 8px;
    font-size: 0.7rem;
    font-family: var(--font-body);
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition), color var(--transition), background var(--transition);
    z-index: 5;
}

.content pre:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: var(--text-primary); background: var(--bg-hover); }
.copy-btn.copied { color: var(--accent); }

/* ── Mermaid Diagrams ── */
.mermaid {
    margin: 24px 0;
    padding: 24px;
    background: var(--bg-mid);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    text-align: center;
    overflow-x: auto;
}

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

/* ── Page Navigation ── */
.page-nav {
    max-width: var(--content-max);
    width: 100%;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
}

.page-nav a {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px 20px;
    background: var(--bg-deep);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    text-decoration: none;
    transition: border-color var(--transition), background var(--transition);
    min-width: 0;
    flex: 1;
}

.page-nav a:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.page-nav a .nav-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.page-nav a .nav-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.page-nav a.next { text-align: right; }

/* ── Hamburger ── */
.hamburger {
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    padding: 6px;
}

.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-logo {
    font-weight: 700;
    font-size: 0.95rem;
}

/* ── Responsive ── */
@media (max-width: 1200px) {
    .toc-sidebar { display: none; }
    .main-content { margin-right: 0; }
}

@media (max-width: 768px) {
    .mobile-header { display: flex; }
    
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        top: 0;
    }
    
    .sidebar.open { transform: translateX(0); }
    
    .sidebar-overlay.active {
        display: block;
        opacity: 1;
    }
    
    .main-content {
        margin-left: 0;
        margin-right: 0;
        padding: calc(var(--header-height) + 24px) 20px 64px;
    }
    
    .content h1 { font-size: 1.6rem; }
    .content h2 { font-size: 1.2rem; }
    
    .page-nav { flex-direction: column; }
    .page-nav a.next { text-align: left; }
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deepest); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Prism Overrides (dark theme) ── */
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata { color: var(--text-muted); }

.token.punctuation { color: var(--text-secondary); }

.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol,
.token.deleted { color: #EF4444; }

.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted { color: #34D399; }

.token.operator,
.token.entity,
.token.url { color: var(--text-secondary); }

.token.atrule,
.token.attr-value,
.token.keyword { color: var(--accent); }

.token.function,
.token.class-name { color: #60A5FA; }

.token.regex,
.token.important,
.token.variable { color: #F472B6; }

/* ── Animations ── */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.content { animation: fadeIn 0.4s ease-out; }