/*
 * ThinkPad CSS Theme
 * A stylesheet inspired by classic IBM ThinkPad design language
 * 
 * Color Palette:
 * - ThinkPad Black: #1a1a1a (matte black chassis)
 * - TrackPoint Red: #e4002b (iconic red pointing stick)
 * - IBM Blue: #0f62fe (classic IBM blue)
 * - ThinkVantage Blue: #0078d4 (button color)
 * - Keyboard Gray: #2d2d2d (keyboard background)
 * - LED Green: #00ff00 (status LEDs)
 * - Screen Bezel: #333333
 */

:root {
    /* ThinkPad Colors */
    --thinkpad-black: #1a1a1a;
    --thinkpad-dark: #0d0d0d;
    --trackpoint-red: #e4002b;
    --trackpoint-red-hover: #ff1a3d;
    --highlight-gray: #555555;
    --highlight-gray-hover: #777777;
    --ibm-blue: #0f62fe;
    --thinkvantage-blue: #0078d4;
    --keyboard-gray: #2d2d2d;
    --bezel-gray: #333333;
    --led-green: #00ff00;
    --led-amber: #ffbf00;
    
    /* Text Colors */
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'IBM Plex Mono', 'Consolas', 'Monaco', monospace;
    
    /* Borders */
    --border-radius: 4px;
    --border-radius-lg: 8px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--thinkpad-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--thinkvantage-blue);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--ibm-blue);
}

img {
    max-width: 100%;
    height: auto;
}

/* Header - ThinkPad Style */
.thinkpad-header {
    background: var(--thinkpad-black);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.header-stripe {
    height: 3px;
    background: linear-gradient(90deg, 
        var(--trackpoint-red) 0%, 
        var(--trackpoint-red) 30%, 
        var(--thinkpad-black) 30%
    );
}

.main-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo:hover {
    color: var(--text-primary);
}

.logo .think {
    color: var(--text-primary);
}

.logo .pad {
    color: var(--text-primary);
}

.logo .trackpoint {
    width: 8px;
    height: 8px;
    background: var(--trackpoint-red);
    border-radius: 50%;
    margin-left: var(--spacing-xs);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: var(--keyboard-gray);
}

/* Main Content */
.main-content {
    flex: 1;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    width: 100%;
}

.main-content.wide {
    max-width: 1400px;
}

.main-content.narrow {
    max-width: 800px;
}

/* Hero Section */

/* ThinkPad Illustration */

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.2s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--highlight-gray);
    color: white;
}

.btn-primary:hover {
    background: var(--highlight-gray-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(85, 85, 85, 0.4);
}

/* Features Grid */

/* Laptops Grid */

/* Page Header */
.page-header {
    text-align: center;
    padding: var(--spacing-xxl) 0;
    border-bottom: 1px solid var(--bezel-gray);
    margin-bottom: var(--spacing-xl);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    color: var(--text-secondary);
}

/* Breadcrumb */

/* Laptop Detail */

/* Specs Grid */

/* Timeline */

/* Filter Section */

/* Series Grid */

/* History Section */

/* Section Footer */

/* Empty State */

/* Error Page */
.error-page {
    text-align: center;
    padding: var(--spacing-xxl);
}

.error-content h1 {
    font-size: 6rem;
    color: var(--highlight-gray);
    margin-bottom: var(--spacing-sm);
}

.error-content h2 {
    margin-bottom: var(--spacing-lg);
}

.bsod {
    background: #0000aa;
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    text-align: left;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    max-width: 600px;
    margin: var(--spacing-xl) auto;
}

.bsod a {
    color: white;
    text-decoration: underline;
}

/* About Content */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-section {
    margin-bottom: var(--spacing-xxl);
}

.about-section h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--highlight-gray);
}

.about-section h3 {
    font-size: 1.25rem;
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

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

.about-section ul {
    list-style: none;
    margin-left: var(--spacing-lg);
}

.about-section li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

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

/* Footer */
.thinkpad-footer {
    background: var(--thinkpad-black);
    border-top: 3px solid var(--trackpoint-red);
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xxl) var(--spacing-lg);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-section a:hover {
    color: var(--trackpoint-red);
}

.footer-bottom {
    border-top: 1px solid var(--bezel-gray);
    padding: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Responsive */
@media (max-width: 768px) {
    
    .nav-links {
        display: none;
    }
}

/* ==========================================
   MTM (Machine Type - Model) Styles
   ========================================== */

/* Stats Banner */

/* MTM Card Grid */

/* MTM Detail Page */

/* MTM Section */

/* Service Documentation Button */

/* Models Table */

/* Documentation Grid */

/* Filter Section */

/* Search Page */

/* Navigation Search Box */

/* Search Dropdown */

.search-result-item {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: background 0.1s ease;
    border-bottom: 1px solid var(--keyboard-gray);
}

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

.search-result-item:hover,
.search-result-item.selected {
    background: var(--keyboard-gray);
}

/* Dropdown result with snippet */

/* Legacy nav-search for backward compat */

/* Library Page Styles */

/* Search Results Page */
.search-results {
    margin-top: var(--spacing-xl);
}

.search-result-item {
    display: block;
    padding: var(--spacing-lg);
    background: var(--keyboard-gray);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.search-result-item h3 {
    margin-bottom: var(--spacing-sm);
}

.search-result-item h3 a {
    color: var(--text-primary);
}

.search-result-item h3 a:hover {
    color: var(--thinkvantage-blue);
}

.search-result-item .result-excerpt {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.search-result-item .result-excerpt mark {
    background: rgba(228, 0, 43, 0.3);
    color: var(--text-primary);
    padding: 0 2px;
}

.search-result-item .result-path {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Responsive for MTM */

/* ============================================================================
 * EPRM / Parts page styles (merged from parts.css)
 * Layered on top of the thinkpad theme using the same custom properties.
 * ============================================================================ */

/* ============================================================
   Landing page
   ============================================================ */
.parts-hero {
    padding: 1rem 0 2.5rem;
    border-bottom: 1px solid var(--bezel-gray);
    margin-bottom: 2.5rem;
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    flex-wrap: wrap;
}
.parts-hero-image {
    flex: 0 0 auto;
    max-width: 320px;
    width: 100%;
    height: auto;
    display: block;
}
.parts-hero-text {
    flex: 1 1 24rem;
    min-width: 0;
}
.parts-hero .hero-eyebrow {
    display: inline-block;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--highlight-gray);
    margin-bottom: 0.5rem;
    font-weight: 700;
}
.parts-hero h1 {
    font-size: 2.4rem;
    margin: 0 0 1rem;
    color: var(--text-primary);
    line-height: 1.15;
}
.parts-hero .hero-lede {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-primary);
    max-width: 56rem;
    margin: 0 0 0.75rem;
}
.parts-hero .hero-lede strong { color: var(--highlight-gray); }

/* Split hero: 701C image on the left, intro text on the right */

/* Machine groups */
.machine-group {
    margin: 2.5rem 0;
}
.group-title {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--bezel-gray);
    padding-bottom: 0.45rem;
    margin-bottom: 1.25rem;
    font-weight: 600;
}

/* Machine grid — same look as .mtm-grid */
.machine-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* Machine card — styled to match .mtm-card */
.machine-card {
    background: var(--thinkpad-black);
    border: 1px solid var(--bezel-gray);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--text-primary);
}
.machine-card:hover {
    transform: translateY(-4px);
    border-color: var(--highlight-gray);
    box-shadow: 0 8px 24px rgba(228, 0, 43, 0.15);
}

.machine-card-header {
    background: var(--keyboard-gray);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--highlight-gray);
}
.machine-card-code {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}
.machine-card-era {
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 3px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
    background: var(--ibm-blue);
    color: white;
}

.machine-card-body {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}
.machine-card-body h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-sm);
    color: var(--text-primary);
    line-height: 1.3;
}
.machine-card-blurb {
    margin: 0.65rem 0 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

/* ============================================================
   MT page (single concatenated document)
   ============================================================ */
.mt-header {
    padding: 0.5rem 0 1.5rem;
}
.mt-cat {
    display: inline-block;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--highlight-gray);
    font-weight: 700;
}
.mt-header h1 {
    margin: 0.4rem 0 0.5rem;
    font-size: 2.2rem;
    color: var(--text-primary);
    line-height: 1.15;
}
.mt-sub {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.95rem;
}
.mt-sub strong {
    color: var(--text-primary);
    font-family: var(--font-mono);
}
.mt-blurb {
    color: var(--text-secondary);
    margin: 0.75rem 0 0;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ============================================================
   MT page two-column layout: sticky left TOC, document on right
   ============================================================ */
.mt-layout {
    display: grid;
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
    margin-top: 1.5rem;
}

.mt-toc-side {
    position: sticky;
    top: 5.5rem;
    max-height: calc(100vh - 6.5rem);
    overflow-y: auto;
    background: var(--thinkpad-black);
    border: 1px solid var(--bezel-gray);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.1rem;
    font-size: 0.88rem;
    scrollbar-width: thin;
}
.mt-toc-side::-webkit-scrollbar { width: 8px; }
.mt-toc-side::-webkit-scrollbar-thumb {
    background: var(--bezel-gray);
    border-radius: 4px;
}

.mt-toc-heading {
    margin: 0 0 0.75rem;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--highlight-gray);
    padding-bottom: 0.35rem;
}

.mt-toc-side .toc-block { margin: 0.6rem 0 0; }
.mt-toc-side .toc-block p {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin: 0 0 0.3rem;
    padding-left: 0.5rem;
    font-weight: 600;
}
.mt-toc-side .toc-block p a { color: inherit; text-decoration: none; }
.mt-toc-side .toc-block p a:hover { color: var(--highlight-gray); }
.mt-toc-side .toc-block ul { list-style: none; padding: 0; margin: 0 0 0.4rem; }
.mt-toc-side .toc-block li { padding: 0.1rem 0 0.1rem 0.7rem; line-height: 1.35; }
.mt-toc-side .toc-block a {
    color: var(--thinkvantage-blue);
    text-decoration: none;
}
.mt-toc-side .toc-block a:hover {
    text-decoration: underline;
    color: var(--highlight-gray);
}

@media (max-width: 900px) {
    .mt-layout {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .mt-toc-side {
        position: static;
        max-height: none;
    }
}

/* Cleaner section heading: in the new layout each section is just an h3 */
.doc-section-title {
    margin: 0 0 0.85rem;
    font-size: 1.2rem;
    line-height: 1.3;
    color: var(--text-primary);
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    border-bottom: 1px solid var(--bezel-gray);
    padding-bottom: 0.4rem;
}
.doc-section-title .anchor-link {
    color: var(--bezel-gray);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.85em;
    transition: color 0.15s;
}
.doc-section:hover .doc-section-title .anchor-link { color: var(--highlight-gray); }

/* Legacy block TOC (kept for back-compat with any non-rewritten page) */
.toc-block {
    margin-top: 1rem;
    break-inside: avoid;
}
.toc-block p {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin: 0 0 0.4rem;
    padding-left: 0.55rem;
    font-weight: 600;
}
.toc-block p a { color: inherit; text-decoration: none; }
.toc-block p a:hover { color: var(--highlight-gray); }
.toc-block ul { list-style: none; padding: 0; margin: 0; }
.toc-block li { padding: 0.15rem 0 0.15rem 0.7rem; }
.toc-block a {
    color: var(--thinkvantage-blue);
    text-decoration: none;
}
.toc-block a:hover { text-decoration: underline; color: var(--highlight-gray); }
@media (min-width: 1024px) {
    .toc-block ul {
        column-count: 2;
        column-gap: 1.5rem;
    }
    .toc-block li { break-inside: avoid; }
}

/* Document sections */
.mt-doc { scroll-behavior: smooth; min-width: 0; }
.doc-group {
    margin: 1rem 0 0;
}
.doc-section {
    background: var(--thinkpad-black);
    border: 1px solid var(--bezel-gray);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1rem;
    scroll-margin-top: 5rem;
}
.doc-section:hover {
    border-color: var(--bezel-gray);
}
.anchor-link {
    color: var(--bezel-gray);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.85em;
    transition: color 0.15s;
}
.doc-section:hover .anchor-link { color: var(--highlight-gray); }

.callouts { margin: 1rem 0 1.5rem; }
.callout {
    background: rgba(228, 0, 43, 0.08);
    padding: 0.65rem 0.85rem;
    border-radius: 4px;
    margin: 0.5rem 0;
    color: var(--text-primary);
}
.callout strong {
    color: var(--highlight-gray);
    margin-right: 0.25rem;
}

/* Body content */
.page-body { font-size: 1rem; color: var(--text-primary); }
.page-body h1, .page-body h2, .page-body h3, .page-body h4 {
    line-height: 1.25;
    color: var(--text-primary);
}
.page-body h2 { font-size: 1.35rem; margin-top: 2rem; }
.page-body h3 {
    font-size: 1.1rem;
    margin-top: 1.5rem;
    color: var(--text-primary);
}
.page-body h4 { font-size: 1rem; margin-top: 1.25rem; color: var(--text-secondary); }
.page-body p { margin: 0.65rem 0; line-height: 1.6; }
.page-body ul, .page-body ol { padding-left: 1.4rem; }
.page-body li { margin: 0.2rem 0; }
.page-body a {
    color: var(--thinkvantage-blue);
    text-decoration: none;
}
.page-body a:hover { color: var(--highlight-gray); text-decoration: underline; }
.page-body code {
    font-family: var(--font-mono);
    font-size: 0.92em;
    background: var(--keyboard-gray);
    padding: 0.1rem 0.35rem;
    border-radius: 3px;
    color: var(--text-primary);
    border: 1px solid var(--bezel-gray);
}
.page-body pre {
    background: var(--thinkpad-dark);
    padding: 1rem;
    border-radius: var(--border-radius-lg);
    overflow-x: auto;
    font-size: 0.9rem;
    border: 1px solid var(--bezel-gray);
}
.page-body pre code {
    background: transparent;
    border: none;
    padding: 0;
}
.page-body pre.ascii-flow,
.page-body pre.data-table {
    white-space: pre;
    line-height: 1.35;
    tab-size: 4;
}
.page-body pre.data-table {
    background: var(--bg-secondary, #1a1a1a);
}
.page-body pre.ascii-flow img,
.page-body pre.data-table img {
    display: inline-block;
    vertical-align: middle;
    border: none;
    background: transparent;
    padding: 0;
    margin: 0 0.25rem;
    max-height: 1.6em;
    width: auto;
}
.page-body hr {
    border: 0;
    border-top: 1px solid var(--bezel-gray);
    margin: 1.25rem 0;
}
.page-body img {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--bezel-gray);
    border-radius: 4px;
    padding: 6px;
    background: #fafafa;
}

/* Tables */
.page-body table {
    border-collapse: collapse;
    width: 100%;
    margin: 1rem 0;
    font-size: 0.94rem;
    background: var(--thinkpad-dark);
    border: 1px solid var(--bezel-gray);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}
.page-body th, .page-body td {
    padding: 0.55rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--bezel-gray);
    vertical-align: top;
    color: var(--text-primary);
}
.page-body th {
    background: var(--keyboard-gray);
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--highlight-gray);
}
.page-body tr:last-child td { border-bottom: 0; }
.page-body tr:hover td { background: rgba(255, 255, 255, 0.02); }

/* Search page */

.search-results { list-style: none; padding: 0; margin: 0; }

/* Related PDF block on MT pages */
.related-pdfs {
    margin-bottom: 2rem; padding: 1rem 1.25rem;
    background: var(--thinkpad-black); border: 1px solid var(--bezel-gray);
    border-radius: var(--border-radius-lg);
}
.related-pdfs h2 {
    font-size: .85rem; text-transform: uppercase; letter-spacing: .1em;
    color: var(--text-secondary); margin: 0 0 .6rem; font-weight: 700;
}
.related-pdfs ul { list-style: none; padding: 0; margin: 0; }
.related-pdfs li { padding: .25rem 0; }
.related-pdfs a {
    color: var(--text-primary); text-decoration: none;
    display: inline-flex; align-items: baseline; gap: .5rem;
}
.related-pdfs a:hover { color: var(--highlight-gray); }
.related-pdfs .pdf-icon {
    background: var(--highlight-gray); color: white; font-size: .65rem;
    padding: .1rem .4rem; border-radius: 2px; font-weight: 700; letter-spacing: .05em;
}


/* mt-docs block on MT pages */
.mt-docs {
    margin-top: 1.5rem; margin-bottom: 2rem;
}
.mt-docs h3 {
    font-size: .85rem; text-transform: uppercase; letter-spacing: .1em;
    color: var(--text-secondary); margin: 0 0 .8rem; font-weight: 700;
}
.mt-docs ul {
    list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.75rem;
}
.mt-docs li { margin: 0; }
.mt-docs a {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    background: var(--thinkpad-black);
    border: 1px solid var(--bezel-gray);
    border-radius: 4px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}
.mt-docs a:hover {
    background: var(--bezel-gray);
    border-color: var(--highlight-gray);
    color: white;
}

/* Overview styling for h4 and h5 */
.page-body h4 {
    font-size: 1.15rem;
    color: var(--highlight-gray);
    border-bottom: 1px solid var(--bezel-gray);
    padding-bottom: 0.35rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}
.page-body h5 {
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.4rem 0.6rem;
    border-left: 3px solid var(--thinkpad-red);
}

/* Fix TOC Overflow */
.mt-toc-side .toc-block p, .mt-toc-side .toc-block a {
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: normal;
    hyphens: auto;
    display: inline-block;
    max-width: 100%;
}
.mt-toc-side .toc-block p {
    line-height: 1.4;
}