/**
 * Knowledge Base Layout Styles
 * 
 * Fumadocs-inspired three-column layout for the user interface.
 */

/* ============================================================================
   Main Layout Structure
   ============================================================================ */

/* Root layout - stacks header and content vertically */
.kb-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Full-width header */
.kb-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--kb-bg-card);
    border-bottom: 1px solid var(--kb-border-subtle);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    backdrop-filter: blur(8px);
}

/* Header inner container - centered with max-width */
.kb-header-inner {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Centered content wrapper with three-column grid */
.kb-content-wrapper {
    flex: 1;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 280px 1fr 220px;
    grid-template-areas: "sidebar-left main sidebar-right";
}

/* No TOC layout - hide right sidebar, expand main content */
.kb-content-wrapper.kb-no-toc {
    grid-template-columns: 280px 1fr;
    grid-template-areas: "sidebar-left main";
}

.kb-content-wrapper.kb-no-toc .kb-sidebar-right {
    display: none;
}

/* Full-width layout - hide both sidebars on desktop, center content */
.kb-content-wrapper.kb-full-width {
    grid-template-columns: 1fr;
    grid-template-areas: "main";
    max-width: 1400px;
}

.kb-content-wrapper.kb-full-width .kb-sidebar-right {
    display: none;
}

/* Hide left sidebar in grid on full-width - but keep it available for mobile slide-out */
.kb-content-wrapper.kb-full-width .kb-sidebar-left {
    position: fixed;
    left: -300px;
    top: 0;
    width: 280px;
    height: 100vh;
    z-index: 200;
    transition: left var(--kb-transition-normal);
    padding-top: 1.5rem;
}

.kb-content-wrapper.kb-full-width .kb-sidebar-left.open {
    left: 0;
}

/* Show sidebar header in full-width mode (needed for close button) */
.kb-content-wrapper.kb-full-width .kb-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--kb-border-subtle);
}

/* Show close button in full-width mode */
.kb-content-wrapper.kb-full-width .kb-mobile-nav-close {
    display: block;
}

.kb-sidebar-left {
    grid-area: sidebar-left;
    position: sticky;
    top: 64px;
    height: calc(100vh - 64px);
    overflow-y: auto;
    background: var(--kb-bg-card);
    border-right: 1px solid var(--kb-border-subtle);
    padding: 1.5rem;
}

.kb-main {
    grid-area: main;
    padding: 2rem 2rem;
    max-width: 100%;
    /* `overflow: clip` clips overflowing content visually (same as `hidden`)
       but does NOT create a scroll container, so position: sticky inside
       descendants (e.g. .vt-sticky-thead) can anchor to the body's scroll. */
    overflow: clip;
    min-width: 0;
}

.kb-sidebar-right {
    grid-area: sidebar-right;
    position: sticky;
    top: 64px;
    height: calc(100vh - 64px);
    overflow-y: auto;
    padding: 2rem 1rem;
    border-left: 1px solid var(--kb-border-subtle);
}

/* ============================================================================
   Header Components
   ============================================================================ */

.kb-header-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--kb-text-primary);
}

.kb-header-brand img {
    height: 32px;
    width: auto;
}

.kb-header-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.kb-theme-toggle {
    transition: color var(--kb-transition-fast);
}

.kb-theme-toggle:hover {
    color: var(--kb-text-primary) !important;
}

/* ============================================================================
   Search Trigger (clickable bar that opens the search modal)
   ============================================================================ */

.kb-search-trigger {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    max-width: 400px;
    padding: 0.5rem 0.75rem 0.5rem 0.875rem;
    background: var(--kb-bg-popover);
    border: 1px solid var(--kb-border-default);
    border-radius: 10px;
    color: var(--kb-text-muted);
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--kb-transition-fast);
    user-select: none;
}

.kb-search-trigger:hover {
    border-color: var(--kb-primary);
    box-shadow: 0 0 0 3px var(--kb-primary-muted);
}

.kb-search-trigger:focus-visible {
    outline: none;
    border-color: var(--kb-primary);
    box-shadow: 0 0 0 3px var(--kb-primary-muted);
}

.kb-search-trigger-icon {
    color: var(--kb-primary);
    font-size: 0.875rem;
    flex-shrink: 0;
}

.kb-search-trigger-text {
    flex: 1;
    text-align: left;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.kb-search-shortcut {
    display: inline-flex;
    align-items: center;
    gap: 0.125rem;
    padding: 0.125rem 0.4rem;
    font-family: inherit;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--kb-text-muted);
    background: var(--kb-bg-muted);
    border: 1px solid var(--kb-border-default);
    border-radius: 4px;
    line-height: 1.4;
    flex-shrink: 0;
}

/* ============================================================================
   Search Modal (fullscreen overlay)
   ============================================================================ */

.kb-search-modal-dialog {
    --bs-modal-margin: 8vh;
    max-width: 680px;
}

.kb-search-modal-content {
    background: var(--kb-bg-popover);
    border: 1px solid var(--kb-border-default);
    border-radius: 12px;
    box-shadow: var(--kb-shadow-xl);
}

.kb-search-modal-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--kb-border-strong);
}

.kb-search-modal-icon {
    color: var(--kb-primary);
    font-size: 1.125rem;
    flex-shrink: 0;
}

.kb-search-modal-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--kb-text-primary);
    font-size: 1.0625rem;
    padding: 0;
    min-width: 0;
}

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

/* Hide the browser-native search clear button */
.kb-search-modal-input::-webkit-search-cancel-button {
    -webkit-appearance: none;
    appearance: none;
}

.kb-search-modal-body {
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.kb-search-modal-body:empty {
    display: none;
}

/* Initial state before any search */
.kb-search-modal-start {
    padding: 2.5rem 1.25rem;
    text-align: center;
    color: var(--kb-text-muted);
    font-size: 0.875rem;
}

.kb-search-modal-footer {
    padding: 0.625rem 1.25rem;
    border-top: 1px solid var(--kb-border-subtle);
}

.kb-search-modal-hints {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--kb-text-muted);
}

.kb-search-hint {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.kb-search-hint kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.25rem;
    padding: 0.0625rem 0.3rem;
    font-family: inherit;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--kb-text-muted);
    background: var(--kb-bg-muted);
    border: 1px solid var(--kb-border-default);
    border-radius: 3px;
    line-height: 1.4;
}

/* ============================================================================
   Search Result Items (shared between modal and any future use)
   ============================================================================ */

.kb-search-item {
    display: block;
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--kb-border-strong);
    text-decoration: none;
    transition: background var(--kb-transition-fast);
}

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

/* Mouse hover - muted background */
.kb-search-item:hover {
    background: var(--kb-bg-muted);
}

/* Suppress hover highlight during keyboard navigation */
.kb-keyboard-nav .kb-search-item:hover:not(.active) {
    background: transparent;
}

/* Active/selected result - primary background with contrasting foreground */
.kb-search-item.active {
    background: var(--kb-primary);
    color: var(--kb-primary-fg);
    border-bottom-color: color-mix(in oklab, var(--kb-primary-fg) 15%, transparent);
}

.kb-search-item.active .kb-search-title {
    color: var(--kb-primary-fg);
}

.kb-search-item.active .kb-search-category {
    color: color-mix(in oklab, var(--kb-primary-fg) 80%, transparent);
}

.kb-search-item.active .kb-search-snippet {
    color: color-mix(in oklab, var(--kb-primary-fg) 75%, transparent);
}

.kb-search-item.active .kb-search-type-article,
.kb-search-item.active .kb-search-type-faq {
    background: color-mix(in oklab, var(--kb-primary-fg) 20%, transparent);
    color: var(--kb-primary-fg);
}

.kb-search-item.active mark,
.kb-search-item.active .highlight {
    background: color-mix(in oklab, var(--kb-primary-fg) 25%, transparent);
    color: var(--kb-primary-fg);
    font-weight: 600;
}

.kb-search-title-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.kb-search-title {
    font-weight: 500;
    color: var(--kb-text-primary);
    flex: 1;
}

.kb-search-type {
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    padding: 0.125rem 0.375rem;
    border-radius: 3px;
    flex-shrink: 0;
}

.kb-search-type-article {
    background: var(--kb-primary-muted);
    color: var(--kb-primary);
}

.kb-search-type-faq {
    background: var(--kb-info-muted);
    color: var(--kb-info);
}

.kb-search-category {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--kb-primary);
    margin-bottom: 0.25rem;
}

.kb-search-snippet {
    font-size: 0.8125rem;
    color: var(--kb-text-secondary);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kb-search-empty {
    padding: 1.5rem;
    text-align: center;
    color: var(--kb-text-muted);
}

/* ============================================================================
   Navigation Tree
   ============================================================================ */

.kb-nav {
    font-size: 0.9375rem;
}

.kb-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.kb-nav-item {
    margin-bottom: 0.125rem;
}

.kb-nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    color: var(--kb-text-secondary);
    border-radius: 6px;
    text-decoration: none;
    transition: all var(--kb-transition-fast);
}

.kb-nav-link:hover {
    background: var(--kb-bg-muted);
    color: var(--kb-text-primary);
}

.kb-nav-link.active {
    background: var(--kb-primary-muted);
    color: var(--kb-primary);
}

.kb-nav-link i {
    font-size: 1rem;
    opacity: 0.7;
}

.kb-nav-category {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    color: var(--kb-primary);
    font-weight: 500;
    text-decoration: none;
    border-radius: 6px;
    transition: all var(--kb-transition-fast);
}

.kb-nav-category:hover {
    background: var(--kb-bg-muted);
    color: var(--kb-primary-hover);
}

.kb-nav-category.active {
    background: var(--kb-primary-muted);
    color: var(--kb-primary);
}

.kb-nav-category i {
    font-size: 1rem;
    opacity: 0.9;
}

.kb-nav-children {
    list-style: none;
    padding-left: 1.25rem;
    margin: 0;
}

/* Collapsible category wrapper */
.kb-nav-collapsible {
    display: flex;
    align-items: center;
}

.kb-nav-collapsible .kb-nav-category {
    flex: 1;
}

.kb-nav-collapse-toggle {
    background: none;
    border: none;
    padding: 0.5rem;
    color: var(--kb-text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: all var(--kb-transition-fast);
}

.kb-nav-collapse-toggle:hover {
    color: var(--kb-primary);
    background: var(--kb-bg-muted);
}

.kb-nav-collapse-toggle i {
    transition: transform var(--kb-transition-fast);
}

.kb-nav-collapse-toggle[aria-expanded="false"] i {
    transform: rotate(-90deg);
}

/* Collapsible children - hidden when collapsed */
.kb-nav-children[data-collapsible="true"].collapsed {
    display: none;
}

.kb-nav-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--kb-text-muted);
    padding: 1rem 0.75rem 0.5rem;
    margin-top: 0.5rem;
}

/* ============================================================================
   Table of Contents (Right Sidebar)
   ============================================================================ */

.kb-toc {
    font-size: 0.875rem;
}

.kb-toc-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--kb-text-muted);
    margin-bottom: 1rem;
}

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

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

.kb-toc-nav a {
    display: block;
    padding: 0.375rem 0;
    color: var(--kb-text-secondary);
    text-decoration: none;
    border-left: 2px solid transparent;
    padding-left: 0.75rem;
    margin-left: -2px;
    transition: all var(--kb-transition-fast);
}

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

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

.kb-toc-nav ul ul {
    padding-left: 0.75rem;
}

.kb-toc-nav ul ul a {
    font-size: 0.8125rem;
}

/* ============================================================================
   Article Content
   ============================================================================ */

.kb-article {
    max-width: 800px;
}

.kb-article-header {
    margin-bottom: 2rem;
}

.kb-article-title {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--kb-text-primary);
}

.kb-article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
}

.kb-article-content {
    line-height: 1.75;
}

.kb-article-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--kb-border-subtle);
}

.kb-article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.kb-article-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.kb-article-content p {
    margin-bottom: 1.25rem;
}

.kb-article-content ul,
.kb-article-content ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.kb-article-content li {
    margin-bottom: 0.5rem;
}

.kb-article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1rem 0;
}

.kb-article-content blockquote {
    border-left: 4px solid var(--kb-primary);
    padding: 0.5rem 0 0.5rem 1.25rem;
    margin: 1.5rem 0;
    background: var(--kb-bg-popover);
    border-radius: 0 8px 8px 0;
}

.kb-article-content blockquote p {
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
}

.kb-article-content table {
    width: 100%;
    margin: 1.5rem 0;
    border-collapse: collapse;
}

.kb-article-content th,
.kb-article-content td {
    padding: 0.75rem;
    border: 1px solid var(--kb-border-default);
    text-align: left;
}

.kb-article-content th {
    background: var(--kb-bg-popover);
    font-weight: 600;
}

/* Anchor links */
.kb-anchor {
    margin-left: 0.5rem;
    opacity: 0;
    color: var(--kb-text-muted);
    text-decoration: none;
    transition: opacity var(--kb-transition-fast);
}

.kb-article-content h2:hover .kb-anchor,
.kb-article-content h3:hover .kb-anchor,
.kb-article-content h4:hover .kb-anchor {
    opacity: 1;
}

/* ============================================================================
   Article Navigation
   ============================================================================ */

.kb-article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--kb-border-subtle);
}

.kb-article-nav-item {
    display: flex;
    flex-direction: column;
    padding: 1rem;
    background: var(--kb-bg-card);
    border: 1px solid var(--kb-border-default);
    border-radius: 10px;
    text-decoration: none;
    transition: all var(--kb-transition-fast);
}

.kb-article-nav-item:hover {
    border-color: var(--kb-primary);
    background: var(--kb-bg-popover);
}

.kb-article-nav-item.next {
    text-align: right;
}

.kb-article-nav-label {
    font-size: 0.75rem;
    color: var(--kb-text-muted);
    margin-bottom: 0.25rem;
}

.kb-article-nav-title {
    font-weight: 500;
    color: var(--kb-text-primary);
}

/* ============================================================================
   Related Articles
   ============================================================================ */

.kb-related {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--kb-border-subtle);
}

.kb-related-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.kb-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.kb-related-item {
    padding: 1rem;
    background: var(--kb-bg-card);
    border: 1px solid var(--kb-border-default);
    border-radius: 10px;
    text-decoration: none;
    transition: all var(--kb-transition-fast);
}

.kb-related-item:hover {
    border-color: var(--kb-primary);
    background: var(--kb-bg-popover);
}

.kb-related-item-title {
    font-weight: 500;
    color: var(--kb-text-primary);
    margin-bottom: 0.25rem;
}

.kb-related-item-category {
    font-size: 0.75rem;
    color: var(--kb-text-muted);
}

/* ============================================================================
   Landing Page
   ============================================================================ */

.kb-hero {
    text-align: center;
    padding: 2rem 1.5rem;
    margin-bottom: 2rem;
    background: var(--kb-primary);
    border-radius: 12px;
    color: var(--kb-primary-fg);
}

.kb-hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--kb-primary-fg);
}

.kb-hero-subtitle {
    font-size: 1.125rem;
    color: var(--kb-primary-fg);
    opacity: 0.9;
    margin-bottom: 1.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.kb-hero-search {
    max-width: 500px;
    margin: 0 auto;
}

/* Hero search trigger variant - uses inverse text on primary background */
.kb-search-trigger-hero {
    max-width: 100%;
    background: color-mix(in oklab, var(--kb-primary-fg) 10%, transparent);
    border: 1px solid color-mix(in oklab, var(--kb-primary-fg) 60%, transparent);
    color: color-mix(in oklab, var(--kb-primary-fg) 70%, transparent);
}

.kb-search-trigger-hero:hover {
    border-color: var(--kb-primary-fg);
    box-shadow: 0 0 0 3px color-mix(in oklab, var(--kb-primary-fg) 20%, transparent);
}

.kb-search-trigger-hero:focus-visible {
    border-color: var(--kb-primary-fg);
    box-shadow: 0 0 0 3px color-mix(in oklab, var(--kb-primary-fg) 20%, transparent);
}

.kb-search-trigger-hero .kb-search-trigger-icon {
    color: color-mix(in oklab, var(--kb-primary-fg) 80%, transparent);
}

.kb-search-trigger-hero .kb-search-trigger-text {
    color: color-mix(in oklab, var(--kb-primary-fg) 70%, transparent);
}

.kb-search-trigger-hero .kb-search-shortcut {
    color: color-mix(in oklab, var(--kb-primary-fg) 80%, transparent);
    background: color-mix(in oklab, var(--kb-primary-fg) 15%, transparent);
    border-color: color-mix(in oklab, var(--kb-primary-fg) 40%, transparent);
}

/* Landing page split layout for categories + FAQ sidebar */
.kb-landing-split {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 2rem;
    align-items: start;
}

.kb-landing-categories {
    min-width: 0;
}

.kb-landing-faq-section {
    position: sticky;
    top: 80px;
}

.kb-landing-faq-sidebar {
    background: var(--kb-bg-card);
    border: 1px solid var(--kb-border-default);
    border-radius: 12px;
    padding: 1.25rem;
}

/* FAQ Accordion styles for sidebar */
.kb-faq-accordion {
    --bs-accordion-bg: transparent;
    --bs-accordion-border-color: var(--kb-border-subtle);
}

.kb-faq-accordion .accordion-item {
    background: transparent;
    border-left: none;
    border-right: none;
    border-top: none;
    transition: border-color var(--kb-transition-fast);
}

.kb-faq-accordion .accordion-item:hover {
    border-color: var(--kb-primary) !important;
}

.kb-faq-accordion .accordion-item:last-child {
    border-bottom: none;
}

.kb-faq-accordion .accordion-button {
    background: transparent;
    color: var(--kb-text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.75rem 1rem;
    box-shadow: none;
    line-height: 1.4;
}

.kb-faq-accordion .accordion-button:not(.collapsed) {
    background: transparent;
    color: var(--kb-primary);
}

.kb-faq-accordion .accordion-button:focus {
    box-shadow: none;
}

.kb-faq-accordion .accordion-button::after {
    display: none;
}

.kb-faq-accordion .accordion-body {
    padding: 1rem;
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
}

.kb-faq-accordion .accordion-body p:last-child {
    margin-bottom: 0;
}

/* Responsive: stack on smaller screens */
@media (max-width: 1024px) {
    .kb-landing-split {
        grid-template-columns: 1fr;
    }
    
    .kb-landing-faq-section {
        position: static;
    }
}

.kb-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.kb-category-card {
    padding: 1.5rem;
    background: var(--kb-bg-card);
    border: 1px solid var(--kb-border-default);
    border-radius: 12px;
    text-decoration: none;
    transition: all var(--kb-transition-fast);
}

.kb-category-card:hover {
    border-color: var(--kb-primary);
    box-shadow: var(--kb-shadow-md);
    transform: translateY(-2px);
}

.kb-category-card-icon {
    font-size: 1.5rem;
    color: var(--kb-primary);
    margin-bottom: 0.75rem;
}

.kb-category-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--kb-text-primary);
    margin-bottom: 0.5rem;
}

.kb-category-card-desc {
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
    margin-bottom: 0.75rem;
}

.kb-category-card-count {
    font-size: 0.75rem;
    color: var(--kb-text-muted);
}

/* ============================================================================
   Article Cards
   ============================================================================ */

.kb-article-card {
    display: block;
    padding: 1.25rem;
    background: var(--kb-bg-card);
    border: 1px solid var(--kb-border-default);
    border-radius: 10px;
    text-decoration: none;
    transition: all var(--kb-transition-fast);
}

.kb-article-card:hover {
    border-color: var(--kb-primary);
    background: var(--kb-bg-popover);
}

.kb-article-card-category {
    font-size: 0.75rem;
    color: var(--kb-primary);
    margin-bottom: 0.5rem;
}

.kb-article-card-title {
    font-weight: 600;
    color: var(--kb-text-primary);
    margin-bottom: 0.5rem;
}

.kb-article-card-type {
    font-size: 0.75rem;
    white-space: nowrap;
    flex-shrink: 0;
}

.kb-article-card-excerpt {
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kb-article-card-meta {
    font-size: 0.75rem;
    color: var(--kb-text-muted);
}

/* ============================================================================
   Mobile Navigation
   ============================================================================ */

.kb-mobile-nav-toggle {
    display: none;
    transition: color var(--kb-transition-fast);
}

.kb-mobile-nav-toggle:hover {
    color: var(--kb-text-primary) !important;
}

.kb-mobile-nav-close {
    display: none;
    transition: color var(--kb-transition-fast);
}

.kb-mobile-nav-close:hover {
    color: var(--kb-text-primary) !important;
}

.kb-mobile-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--kb-bg-overlay);
    z-index: 99;
}

.kb-mobile-backdrop.active {
    display: block;
}

/* Sidebar header - only visible on mobile */
.kb-sidebar-header {
    display: none;
}

/* Hide elements on mobile */
.kb-hide-mobile {
    display: flex;
}

/* ============================================================================
   Responsive Breakpoints
   ============================================================================ */

/* Medium-large screens: collapse left nav to hamburger, keep right TOC */
@media (max-width: 1199px) {
    .kb-content-wrapper {
        grid-template-columns: 1fr 220px;
        grid-template-areas: "main sidebar-right";
    }
    
    .kb-content-wrapper.kb-no-toc,
    .kb-content-wrapper.kb-full-width {
        grid-template-columns: 1fr;
        grid-template-areas: "main";
    }
    
    .kb-sidebar-left {
        position: fixed;
        left: -300px;
        top: 0;
        width: 280px;
        height: 100vh;
        z-index: 200;
        transition: left var(--kb-transition-normal);
        padding-top: 1.5rem;
    }
    
    .kb-sidebar-left.open {
        left: 0;
    }
    
    .kb-mobile-nav-toggle {
        display: flex;
        margin-right: 1rem;
    }
    
    .kb-mobile-nav-close {
        display: block;
    }
    
    /* Hide brand and theme toggle in main header on mobile */
    .kb-hide-mobile {
        display: none !important;
    }
    
    /* Show sidebar header on mobile */
    .kb-sidebar-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-bottom: 1rem;
        margin-bottom: 1rem;
        border-bottom: 1px solid var(--kb-border-subtle);
    }
}

/* Medium screens: hide right TOC as well */
@media (max-width: 991px) {
    .kb-content-wrapper {
        grid-template-columns: 1fr;
        grid-template-areas: "main";
    }
    
    .kb-sidebar-right {
        display: none;
    }
    
    .kb-main {
        padding: 1.5rem;
    }
    
    .kb-article-title {
        font-size: 1.75rem;
    }
    
    .kb-hero-title {
        font-size: 2rem;
    }
}

/* Small screens */
@media (max-width: 576px) {
    .kb-header-inner {
        padding: 0 1.5rem;
    }
    
    .kb-search-trigger {
        max-width: none;
    }
    
    .kb-search-shortcut {
        display: none;
    }
    
    .kb-search-modal-dialog {
        --bs-modal-margin: 0;
        max-width: 100%;
        min-height: 100vh;
    }
    
    .kb-search-modal-content {
        border-radius: 0;
        border: none;
        min-height: 100vh;
    }
    
    .kb-search-modal-footer {
        display: none;
    }
    
    .kb-article-nav {
        grid-template-columns: 1fr;
    }
    
    .kb-categories-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   Admin Layout
   ============================================================================ */

.kb-admin-layout {
    display: flex;
    min-height: 100vh;
}

.kb-admin-sidebar {
    width: 225px;
    background: var(--kb-admin-sidebar-bg);
    border-right: 1px solid var(--kb-border-subtle);
    padding: 1rem;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

/* Theme dropdown in sidebar needs high z-index to appear above main content */
.kb-admin-sidebar .dropdown-menu {
    z-index: 1050;
}

/* Admin sidebar branding - theme aware */
.kb-admin-brand a {
    color: var(--kb-admin-brand-color);
}

.kb-admin-brand a h5 {
    color: inherit;
}

/* Admin nav link styling */
.kb-admin-nav .nav-link {
    color: var(--kb-admin-nav-color);
    transition: all var(--kb-transition-fast);
}

.kb-admin-nav .nav-link:hover {
    color: var(--kb-admin-nav-hover-color);
    background: var(--kb-admin-nav-hover-bg);
}

.kb-admin-nav .nav-link.active {
    color: var(--kb-primary-fg) !important;
    background: var(--kb-primary);
    box-shadow: 0 2px 8px var(--kb-primary-muted);
}

.kb-admin-main {
    flex: 1;
    margin-left: 225px;
    padding: 0;
    background: var(--kb-bg-primary);
}

.kb-admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--kb-border-subtle);
    background: var(--kb-bg-card);
}

.kb-admin-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--kb-text-primary);
    margin-bottom: 0;
}

/* Admin content area with padding */
.kb-admin-content {
    padding: 2rem;
}

/* Admin sidebar toggle (hamburger) - always visible */
.kb-admin-sidebar-toggle {
    transition: color var(--kb-transition-fast);
    position: relative;
    left: 3px;
}

.kb-admin-sidebar-toggle:hover {
    color: var(--kb-text-primary) !important;
}

/* Admin sidebar close button - hidden by default, shown on mobile */
.kb-admin-sidebar-close {
    display: none;
    transition: color var(--kb-transition-fast);
}

.kb-admin-sidebar-close:hover {
    color: var(--kb-text-primary) !important;
}

/* Admin backdrop - for mobile overlay */
.kb-admin-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--kb-bg-overlay);
    z-index: 99;
}

.kb-admin-backdrop.active {
    display: block;
}

/* Admin sidebar collapsed state - Desktop (icon-only mode) */
.kb-admin-sidebar {
    transition: width var(--kb-transition-normal);
}

.kb-admin-sidebar.collapsed {
    width: 60px;
    padding: 1rem 0.5rem;
}

/* Hide text labels when collapsed */
.kb-admin-sidebar.collapsed .kb-admin-brand a h5 {
    display: none;
}

.kb-admin-sidebar.collapsed .kb-admin-nav .nav-link {
    justify-content: center;
    padding: 0.75rem;
}

.kb-admin-sidebar.collapsed .kb-admin-nav .nav-link i {
    margin-right: 0 !important;
}

.kb-admin-sidebar.collapsed .kb-admin-nav .nav-link span,
.kb-admin-sidebar.collapsed .kb-admin-nav .nav-link:not(i) {
    font-size: 0;
}

/* Hide text in nav links when collapsed - target text nodes */
.kb-admin-sidebar.collapsed .nav-link {
    font-size: 0;
}

.kb-admin-sidebar.collapsed .nav-link i {
    font-size: 1.25rem;
}

/* Collapsed state - center the hamburger icon */
.kb-admin-sidebar.collapsed .kb-admin-brand {
    justify-content: center !important;
}

.kb-admin-sidebar.collapsed .kb-admin-brand > div:first-child {
    justify-content: center;
}

/* Hide title link when collapsed */
.kb-admin-sidebar.collapsed .kb-admin-brand > div:first-child a {
    display: none;
}

/* Hide theme toggle and close button when collapsed on desktop */
.kb-admin-sidebar.collapsed .kb-admin-brand > div:last-child {
    display: none !important;
}

/* Hide the hr separator when collapsed */
.kb-admin-sidebar.collapsed .kb-admin-nav hr {
    margin: 0.75rem 0;
}

.kb-admin-main {
    transition: margin-left var(--kb-transition-normal);
}

.kb-admin-main.sidebar-collapsed {
    margin-left: 60px;
}

/* Mobile admin layout */
@media (max-width: 991px) {
    .kb-admin-sidebar {
        position: fixed;
        left: 0;
        top: 0;
        width: 280px !important;
        height: 100vh;
        z-index: 200;
        transform: translateX(-100%);
        padding: 1.5rem !important;
    }
    
    .kb-admin-sidebar.open {
        transform: translateX(0);
    }
    
    /* On mobile, collapsed class uses transform, not width */
    .kb-admin-sidebar.collapsed {
        transform: translateX(-100%);
        width: 280px !important;
    }
    
    /* Reset collapsed styles on mobile - show full sidebar when open */
    .kb-admin-sidebar.collapsed.open,
    .kb-admin-sidebar.open {
        transform: translateX(0);
    }
    
    /* Show text labels on mobile when sidebar is open */
    .kb-admin-sidebar.open .kb-admin-brand a h5 {
        display: block;
    }
    
    .kb-admin-sidebar.open .kb-admin-brand > div:first-child a {
        display: block;
    }
    
    .kb-admin-sidebar.open .nav-link {
        font-size: inherit;
        justify-content: flex-start;
        padding: 0.5rem 0.75rem;
    }
    
    .kb-admin-sidebar.open .nav-link i {
        font-size: 1rem;
        margin-right: 0.5rem !important;
    }
    
    .kb-admin-sidebar.open .kb-admin-brand {
        justify-content: space-between;
    }
    
    .kb-admin-sidebar.open .kb-admin-brand > div:first-child {
        gap: 0.5rem;
        justify-content: flex-start;
    }
    
    .kb-admin-sidebar.open .kb-admin-brand > div:last-child {
        display: flex !important;
    }
    
    .kb-admin-sidebar-close {
        display: block;
    }
    
    .kb-admin-main {
        margin-left: 0 !important;
    }
    
    .kb-admin-main.sidebar-collapsed {
        margin-left: 0 !important;
    }
    
    .kb-admin-layout {
        flex-direction: column;
    }
    
    .kb-admin-header {
        padding: 1rem 1.5rem;
    }
    
    .kb-admin-content {
        padding: 1.5rem;
    }
}