/* ==========================================================================
   Docsfy - Documentation Theme
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Light Theme - Default)
   -------------------------------------------------------------------------- */
:root {
    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-sidebar: #f9fafb;
    --bg-code: #f5f5f5;
    --bg-code-block: #1e1e2e;
    --bg-card: #ffffff;
    --bg-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-search-result: #ffffff;

    /* Text */
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #6b7280;
    --text-inverse: #ffffff;
    --text-link: #4f46e5;
    --text-link-hover: #4338ca;
    --text-code: #e11d48;
    --text-code-block: #d4d4d8;

    /* Borders */
    --border-primary: #e5e7eb;
    --border-secondary: #f3f4f6;
    --border-focus: #4f46e5;

    /* Accent */
    --accent: #4f46e5;
    --accent-light: #eef2ff;
    --accent-hover: #4338ca;

    /* Callouts */
    --callout-note-bg: #eff6ff;
    --callout-note-border: #3b82f6;
    --callout-note-text: #1e40af;
    --callout-warning-bg: #fffbeb;
    --callout-warning-border: #f59e0b;
    --callout-warning-text: #92400e;
    --callout-tip-bg: #ecfdf5;
    --callout-tip-border: #10b981;
    --callout-tip-text: #065f46;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    /* Layout */
    --sidebar-width: 280px;
    --content-max-width: 720px;
    --header-height: 56px;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    --font-mono: "SF Mono", SFMono-Regular, ui-monospace, "DejaVu Sans Mono", Menlo, Consolas, monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    /* Table */
    --table-row-alt: #f9fafb;
    --table-border: #e5e7eb;
}

/* --------------------------------------------------------------------------
   Dark Theme
   -------------------------------------------------------------------------- */
[data-theme="dark"] {
    --bg-primary: #0f1117;
    --bg-secondary: #161822;
    --bg-tertiary: #1e2030;
    --bg-sidebar: #161822;
    --bg-code: #1e2030;
    --bg-code-block: #1e2030;
    --bg-card: #161822;
    --bg-hero: linear-gradient(135deg, #3730a3 0%, #6d28d9 100%);
    --bg-search-result: #1e2030;

    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    --text-inverse: #ffffff;
    --text-link: #818cf8;
    --text-link-hover: #a5b4fc;
    --text-code: #fb7185;
    --text-code-block: #d4d4d8;

    --border-primary: #2e3248;
    --border-secondary: #252838;
    --border-focus: #818cf8;

    --accent: #818cf8;
    --accent-light: #1e1b4b;
    --accent-hover: #a5b4fc;

    --callout-note-bg: #172554;
    --callout-note-border: #3b82f6;
    --callout-note-text: #93c5fd;
    --callout-warning-bg: #451a03;
    --callout-warning-border: #f59e0b;
    --callout-warning-text: #fcd34d;
    --callout-tip-bg: #052e16;
    --callout-tip-border: #10b981;
    --callout-tip-text: #6ee7b7;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);

    --table-row-alt: #1a1c2e;
    --table-border: #2e3248;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height, 60px) + 20px);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.7;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    display: flex;
    min-height: 100vh;
}

a {
    color: var(--text-link);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--text-link-hover);
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Sidebar
   -------------------------------------------------------------------------- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-primary);
    overflow-y: auto;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.sidebar-header {
    padding: 24px 20px 16px;
    border-bottom: 1px solid var(--border-secondary);
}

.sidebar-logo {
    display: block;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.01em;
}

.sidebar-logo:hover {
    color: var(--accent);
    text-decoration: none;
}

.sidebar-tagline {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 4px;
    line-height: 1.4;
}

/* Sidebar Search */
.sidebar-search {
    padding: 12px 20px;
    position: relative;
}

#search-input {
    width: 100%;
    padding: 8px 12px;
    font-size: 0.875rem;
    font-family: var(--font-sans);
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
                background-color var(--transition-normal);
}

#search-input::placeholder {
    color: var(--text-tertiary);
}

#search-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.search-results {
    display: none;
    position: absolute;
    top: 100%;
    left: 20px;
    right: 20px;
    background: var(--bg-search-result);
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    z-index: 200;
    max-height: 300px;
    overflow-y: auto;
}

.search-result-item {
    display: block;
    padding: 10px 14px;
    font-size: 0.875rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-secondary);
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background: var(--accent-light);
    color: var(--accent);
    text-decoration: none;
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: 8px 0 24px;
    overflow-y: auto;
}

.nav-group {
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-group-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    padding: 12px 8px 6px;
}

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

.nav-link {
    display: block;
    padding: 6px 12px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-radius: 6px;
    text-decoration: none;
    transition: color var(--transition-fast), background-color var(--transition-fast);
    line-height: 1.5;
}

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

.nav-link.active {
    color: var(--accent);
    background: var(--accent-light);
    font-weight: 500;
}

/* --------------------------------------------------------------------------
   Main Wrapper
   -------------------------------------------------------------------------- */
.main-wrapper {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
}

/* --------------------------------------------------------------------------
   Top Bar
   -------------------------------------------------------------------------- */
.top-bar {
    position: sticky;
    top: 0;
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 24px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-primary);
    z-index: 50;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.top-bar-spacer {
    flex: 1;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

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

.theme-toggle {
    background: none;
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 7px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast), background-color var(--transition-fast),
                border-color var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border-color: var(--border-primary);
}

/* Show sun in dark mode, moon in light mode */
.icon-sun {
    display: none;
}

.icon-moon {
    display: block;
}

[data-theme="dark"] .icon-sun {
    display: block;
}

[data-theme="dark"] .icon-moon {
    display: none;
}

/* --------------------------------------------------------------------------
   Content
   -------------------------------------------------------------------------- */
.content {
    flex: 1;
    padding: calc(var(--header-height, 60px) + 20px) 48px 40px;
    max-width: calc(var(--content-max-width) + 96px);
}

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

.article-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin-bottom: 24px;
    line-height: 1.25;
}

.article-body {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-secondary);
}

/* Typography in article body */
.article-body h1 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-top: 48px;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.article-body h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 40px;
    margin-bottom: 12px;
    color: var(--text-primary);
    letter-spacing: -0.015em;
    line-height: 1.35;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-secondary);
}

.article-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 8px;
    color: var(--text-primary);
    line-height: 1.4;
}

.article-body h4 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.article-body p {
    margin-bottom: 16px;
}

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

.article-body li {
    margin-bottom: 6px;
}

.article-body li > ul,
.article-body li > ol {
    margin-top: 6px;
    margin-bottom: 0;
}

/* Inline code */
.article-body code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--bg-code);
    color: var(--text-code);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Code blocks (Pygments / codehilite) */
.article-body pre {
    margin-bottom: 20px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.875rem;
    line-height: 1.6;
}

.article-body .highlight {
    background: var(--bg-code-block);
    border-radius: 8px;
    padding: 16px 20px;
    overflow-x: auto;
    margin-bottom: 20px;
}

.article-body .highlight pre {
    margin: 0;
    background: transparent;
    padding: 0;
    color: var(--text-code-block);
}

.article-body .highlight code {
    background: transparent;
    color: inherit;
    padding: 0;
    font-size: 0.875rem;
}

/* Pygments syntax highlighting tokens */
.highlight .hll { background-color: #3d405b; }
.highlight .c   { color: #6a737d; font-style: italic; } /* Comment */
.highlight .k   { color: #c678dd; font-weight: bold; }  /* Keyword */
.highlight .o   { color: #c678dd; }                      /* Operator */
.highlight .cm  { color: #6a737d; font-style: italic; }  /* Comment.Multiline */
.highlight .cp  { color: #6a737d; font-weight: bold; }   /* Comment.Preproc */
.highlight .c1  { color: #6a737d; font-style: italic; }  /* Comment.Single */
.highlight .cs  { color: #6a737d; font-style: italic; }  /* Comment.Special */
.highlight .gd  { color: #e06c75; }                      /* Generic.Deleted */
.highlight .gi  { color: #98c379; }                      /* Generic.Inserted */
.highlight .ge  { font-style: italic; }                  /* Generic.Emph */
.highlight .gs  { font-weight: bold; }                   /* Generic.Strong */
.highlight .gu  { color: #56b6c2; font-weight: bold; }  /* Generic.Subheading */
.highlight .kc  { color: #c678dd; font-weight: bold; }  /* Keyword.Constant */
.highlight .kd  { color: #c678dd; font-weight: bold; }  /* Keyword.Declaration */
.highlight .kn  { color: #c678dd; }                     /* Keyword.Namespace */
.highlight .kp  { color: #c678dd; }                     /* Keyword.Pseudo */
.highlight .kr  { color: #c678dd; font-weight: bold; }  /* Keyword.Reserved */
.highlight .kt  { color: #e5c07b; }                     /* Keyword.Type */
.highlight .m   { color: #d19a66; }                     /* Literal.Number */
.highlight .s   { color: #98c379; }                     /* Literal.String */
.highlight .na  { color: #e06c75; }                     /* Name.Attribute */
.highlight .nb  { color: #56b6c2; }                     /* Name.Builtin */
.highlight .nc  { color: #e5c07b; font-weight: bold; }  /* Name.Class */
.highlight .no  { color: #e06c75; }                     /* Name.Constant */
.highlight .nd  { color: #61afef; }                     /* Name.Decorator */
.highlight .nf  { color: #61afef; }                     /* Name.Function */
.highlight .nn  { color: #e5c07b; }                     /* Name.Namespace */
.highlight .nt  { color: #e06c75; }                     /* Name.Tag */
.highlight .nv  { color: #e06c75; }                     /* Name.Variable */
.highlight .ow  { color: #c678dd; font-weight: bold; }  /* Operator.Word */
.highlight .w   { color: #abb2bf; }                     /* Text.Whitespace */
.highlight .mb  { color: #d19a66; }                     /* Literal.Number.Bin */
.highlight .mf  { color: #d19a66; }                     /* Literal.Number.Float */
.highlight .mh  { color: #d19a66; }                     /* Literal.Number.Hex */
.highlight .mi  { color: #d19a66; }                     /* Literal.Number.Integer */
.highlight .mo  { color: #d19a66; }                     /* Literal.Number.Oct */
.highlight .sa  { color: #98c379; }                     /* Literal.String.Affix */
.highlight .sb  { color: #98c379; }                     /* Literal.String.Backtick */
.highlight .sc  { color: #98c379; }                     /* Literal.String.Char */
.highlight .dl  { color: #98c379; }                     /* Literal.String.Delimiter */
.highlight .sd  { color: #98c379; font-style: italic; } /* Literal.String.Doc */
.highlight .s2  { color: #98c379; }                     /* Literal.String.Double */
.highlight .se  { color: #d19a66; }                     /* Literal.String.Escape */
.highlight .sh  { color: #98c379; }                     /* Literal.String.Heredoc */
.highlight .si  { color: #98c379; }                     /* Literal.String.Interpol */
.highlight .sx  { color: #98c379; }                     /* Literal.String.Other */
.highlight .sr  { color: #56b6c2; }                     /* Literal.String.Regex */
.highlight .s1  { color: #98c379; }                     /* Literal.String.Single */
.highlight .ss  { color: #98c379; }                     /* Literal.String.Symbol */
.highlight .bp  { color: #56b6c2; }                     /* Name.Builtin.Pseudo */
.highlight .fm  { color: #61afef; }                     /* Name.Function.Magic */
.highlight .vc  { color: #e06c75; }                     /* Name.Variable.Class */
.highlight .vg  { color: #e06c75; }                     /* Name.Variable.Global */
.highlight .vi  { color: #e06c75; }                     /* Name.Variable.Instance */
.highlight .vm  { color: #e06c75; }                     /* Name.Variable.Magic */
.highlight .il  { color: #d19a66; }                     /* Literal.Number.Integer.Long */

/* --------------------------------------------------------------------------
   Blockquotes / Callouts
   -------------------------------------------------------------------------- */
.article-body blockquote p {
    margin-bottom: 8px;
}

.article-body blockquote p:last-child {
    margin-bottom: 0;
}

/* Callout boxes */
blockquote.callout-note {
    border-left: 4px solid #3b82f6;
    background: rgba(59, 130, 246, 0.08);
    padding: 1rem 1.25rem;
    border-radius: 0 8px 8px 0;
    margin: 1.5rem 0;
}

blockquote.callout-warning {
    border-left: 4px solid #f59e0b;
    background: rgba(245, 158, 11, 0.08);
    padding: 1rem 1.25rem;
    border-radius: 0 8px 8px 0;
    margin: 1.5rem 0;
}

blockquote.callout-tip {
    border-left: 4px solid #10b981;
    background: rgba(16, 185, 129, 0.08);
    padding: 1rem 1.25rem;
    border-radius: 0 8px 8px 0;
    margin: 1.5rem 0;
}

/* Chained :not() for broader browser compatibility */
/* Default blockquote styling (not a callout) */
blockquote:not(.callout-note):not(.callout-warning):not(.callout-tip) {
    border-left: 4px solid var(--border-primary);
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    font-size: 0.9375rem;
    border: 1px solid var(--table-border);
    border-radius: 8px;
    overflow: hidden;
}

.article-body thead {
    background: var(--bg-tertiary);
}

.article-body th {
    padding: 10px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--table-border);
}

.article-body td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--table-border);
    color: var(--text-secondary);
}

.article-body tbody tr:nth-child(even) {
    background: var(--table-row-alt);
}

.article-body tbody tr:hover {
    background: var(--accent-light);
}

/* --------------------------------------------------------------------------
   Links in article
   -------------------------------------------------------------------------- */
.article-body a {
    color: var(--text-link);
    text-decoration: underline;
    text-decoration-color: rgba(79, 70, 229, 0.3);
    text-underline-offset: 2px;
    transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

.article-body a:hover {
    color: var(--text-link-hover);
    text-decoration-color: var(--text-link-hover);
}

/* --------------------------------------------------------------------------
   Images
   -------------------------------------------------------------------------- */
.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 16px 0;
}

/* --------------------------------------------------------------------------
   Horizontal Rule
   -------------------------------------------------------------------------- */
.article-body hr {
    border: none;
    border-top: 1px solid var(--border-primary);
    margin: 32px 0;
}

/* --------------------------------------------------------------------------
   Hero Section (Index Page)
   -------------------------------------------------------------------------- */
.hero {
    text-align: center;
    padding: 80px 24px 60px;
    background: var(--bg-hero);
    border-radius: 16px;
    margin-bottom: 48px;
    color: var(--text-inverse);
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
    line-height: 1.15;
}

.hero-tagline {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 32px;
    line-height: 1.5;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: inline-block;
    padding: 12px 32px;
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-inverse);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: background var(--transition-fast);
    backdrop-filter: blur(4px);
}

.hero-cta:hover {
    background: rgba(255, 255, 255, 0.3);
    color: var(--text-inverse);
    text-decoration: none;
}

/* --------------------------------------------------------------------------
   Card Grid (Index Page)
   -------------------------------------------------------------------------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 48px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: 12px;
    padding: 24px;
    transition: box-shadow var(--transition-normal), border-color var(--transition-fast),
                background-color var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--accent);
}

.card-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.card-pages {
    list-style: none;
    margin-bottom: 16px;
}

.card-pages li {
    margin-bottom: 8px;
}

.card-pages a {
    font-size: 0.9375rem;
    color: var(--text-link);
    text-decoration: none;
}

.card-pages a:hover {
    text-decoration: underline;
}

.card-page-desc {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 2px;
    line-height: 1.4;
}

.card-link {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.card-link:hover {
    color: var(--accent-hover);
    text-decoration: none;
}

/* --------------------------------------------------------------------------
   Table of Contents - Right Sidebar
   -------------------------------------------------------------------------- */
.toc-sidebar {
    position: fixed;
    top: var(--header-height);
    right: 20px;
    width: 200px;
    max-height: calc(100vh - var(--header-height) - 20px);
    overflow-y: auto;
    font-size: 0.8125rem;
    display: none;
}

.toc-container h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    position: sticky;
    top: 0;
    background: var(--bg-primary);
    padding: 12px 0 8px;
    z-index: 1;
}

.toc-container ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-container li {
    margin-bottom: 0.4rem;
}

.toc-container a {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    padding: 0.2rem 0;
    padding-left: 0.75rem;
    border-left: 2px solid var(--border-primary);
    transition: all 0.15s ease;
}

.toc-container a:hover {
    color: var(--accent);
    border-left-color: var(--accent);
}

/* Hide h3+ nested items to limit TOC depth to h2 only */
.toc-container ul ul {
    display: none;
}

/* Show TOC and adjust main content on wide screens only */
@media (min-width: 1280px) {
    .toc-sidebar {
        display: block;
    }

    .content {
        margin-right: 220px;
    }
}

/* TOC is hidden by default (display: none above), no extra rule needed */

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: 24px 48px;
    border-top: 1px solid var(--border-primary);
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    transition: border-color var(--transition-normal);
}

.footer a {
    color: var(--text-link);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Sidebar Overlay (Mobile)
   -------------------------------------------------------------------------- */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 90;
}

.sidebar-overlay.open {
    display: block;
}

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

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

    .main-wrapper {
        margin-left: 0;
    }

    .sidebar-toggle {
        display: flex;
    }

    .content {
        padding: 24px 20px;
    }

    .footer {
        padding: 20px;
    }

    .hero {
        padding: 48px 20px 40px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-tagline {
        font-size: 1.0625rem;
    }

    .article-title {
        font-size: 1.625rem;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .article-body h1 {
        font-size: 1.5rem;
    }

    .article-body h2 {
        font-size: 1.25rem;
    }

    .article-body h3 {
        font-size: 1.125rem;
    }
}

/* --------------------------------------------------------------------------
   Scrollbar Styling
   -------------------------------------------------------------------------- */
.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    .sidebar,
    .top-bar,
    .sidebar-overlay {
        display: none !important;
    }

    .main-wrapper {
        margin-left: 0 !important;
    }

    .content {
        padding: 0;
        max-width: 100%;
    }
}

/* --------------------------------------------------------------------------
   Code Copy Button
   -------------------------------------------------------------------------- */
.copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 10px;
    font-size: 0.75rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s ease;
}

pre:hover .copy-btn {
    opacity: 1;
}

/* Make copy button always visible on touch devices */
@media (hover: none) {
    .copy-btn {
        opacity: 0.7;
    }
}

.copy-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* --------------------------------------------------------------------------
   Prev/Next Page Navigation
   -------------------------------------------------------------------------- */
.page-nav {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-primary);
}

.page-nav-link {
    display: flex;
    flex-direction: column;
    padding: 1rem 1.25rem;
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.15s ease;
    max-width: 50%;
}

.page-nav-link:hover {
    border-color: var(--accent);
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.1);
}

.page-nav-next {
    text-align: right;
    margin-left: auto;
}

.page-nav-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.page-nav-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent);
}

/* --------------------------------------------------------------------------
   Search Modal (Cmd+K)
   -------------------------------------------------------------------------- */
.search-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    padding-top: 15vh;
}

.search-modal-overlay.active {
    display: flex;
}

.search-modal {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 12px;
    width: 560px;
    max-height: 480px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.search-modal-input {
    width: 100%;
    padding: 16px 20px;
    border: none;
    border-bottom: 1px solid var(--border-primary);
    background: transparent;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    box-sizing: border-box;
}

.search-modal-results {
    overflow-y: auto;
    flex: 1;
}

.search-modal .search-result-item {
    display: flex;
    flex-direction: column;
    padding: 12px 20px;
    text-decoration: none;
    border-bottom: 1px solid var(--border-primary);
    transition: background 0.1s ease;
}

.search-modal .search-result-item:hover,
.search-modal .search-result-item.selected {
    background: var(--bg-secondary);
}

.search-result-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.search-result-preview {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-no-results {
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
}

.search-modal-footer {
    padding: 8px 20px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-primary);
    text-align: center;
}

.search-modal-footer kbd {
    display: inline-block;
    padding: 2px 6px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.7rem;
}

/* --------------------------------------------------------------------------
   Scroll Spy - TOC Active State
   -------------------------------------------------------------------------- */
.toc-container a.toc-active {
    color: var(--accent);
    border-left-color: var(--accent);
    font-weight: 500;
}

/* --------------------------------------------------------------------------
   Top Bar - Desktop Visibility & Layout
   -------------------------------------------------------------------------- */
.top-bar-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-bar-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.01em;
}

.top-bar-title:hover {
    color: var(--accent);
    text-decoration: none;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-bar-search-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: color var(--transition-fast), background-color var(--transition-fast),
                border-color var(--transition-fast);
}

.top-bar-search-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border-color: var(--border-primary);
}

.top-bar-search-btn kbd {
    display: inline-block;
    padding: 1px 5px;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.7rem;
    color: var(--text-tertiary);
}

.top-bar-github {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1px solid var(--border-primary);
    border-radius: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition-fast), background-color var(--transition-fast),
                border-color var(--transition-fast);
}

.top-bar-github:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border-color: var(--accent);
    text-decoration: none;
}

.top-bar-github svg {
    flex-shrink: 0;
}

.github-stars {
    font-weight: 600;
    font-size: 0.8rem;
}

.github-stars:empty {
    display: none;
}

/* --------------------------------------------------------------------------
   Code Language Labels
   -------------------------------------------------------------------------- */
.code-label {
    position: absolute;
    top: 8px;
    right: 60px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.6;
}