/* =============================================================================
   OrangeChat Documentation CMS - Knowledge Base Styles
   Extends existing docs.css with sidebar layout, category cards,
   search, article listing, and table of contents.
   ============================================================================= */

/* =============================================================================
   KB Layout (Sidebar + Main)
   ============================================================================= */

.docs-kb-layout {
    display: flex;
    gap: 32px;
    align-items: flex-start;
    min-height: calc(100vh - 260px);
}

/* =============================================================================
   Sidebar
   ============================================================================= */

.docs-sidebar {
    width: 280px;
    flex-shrink: 0;
    position: sticky;
    top: 100px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 107, 0, 0.2) transparent;
}

.docs-sidebar::-webkit-scrollbar {
    width: 4px;
}

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

.docs-sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 107, 0, 0.2);
    border-radius: 2px;
}

.docs-sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 107, 0, 0.4);
}

.sidebar-close {
    display: none;
    position: absolute;
    top: 12px;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    z-index: 2;
}

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

/* Sidebar Search */
.docs-search {
    position: relative;
    margin-bottom: 20px;
}

.docs-search .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    z-index: 1;
}

.docs-search input {
    width: 100%;
    padding: 10px 12px 10px 38px;
    background: rgba(20, 20, 40, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    outline: none;
    transition: all var(--transition-normal);
}

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

.docs-search input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.1), 0 0 20px rgba(255, 107, 0, 0.05);
}

/* Search Results Dropdown */
.search-results-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--bg-elevated, #222236);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    max-height: 320px;
    overflow-y: auto;
    z-index: 100;
    display: none;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

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

.search-results-dropdown .search-result-item {
    display: block;
    padding: 10px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background var(--transition-normal);
}

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

.search-results-dropdown .search-result-item:hover,
.search-results-dropdown .search-result-item.focused {
    background: rgba(255, 107, 0, 0.08);
    color: var(--text-primary);
}

.search-results-dropdown .search-result-title {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.search-results-dropdown .search-result-category {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.search-results-dropdown .search-no-results {
    padding: 16px 14px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Sidebar Navigation */
.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-category {
    border-radius: 8px;
    overflow: hidden;
}

.sidebar-category-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 8px 10px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all var(--transition-normal);
    border-radius: 8px;
}

.sidebar-category-title:hover {
    color: var(--accent);
    background: rgba(255, 107, 0, 0.05);
}

.sidebar-category-title .chevron {
    transition: transform var(--transition-normal);
    flex-shrink: 0;
}

.sidebar-category.expanded .sidebar-category-title .chevron {
    transform: rotate(180deg);
}

.sidebar-category.expanded .sidebar-category-title {
    color: var(--accent);
}

/* Sidebar Article Links */
.sidebar-articles {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.sidebar-category.expanded .sidebar-articles {
    max-height: 1000px;
}

.sidebar-articles li {
    margin: 0;
}

.sidebar-articles li::before {
    display: none;
}

.sidebar-articles a {
    display: block;
    padding: 6px 10px 6px 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    line-height: 1.5;
    border-left: 2px solid transparent;
    transition: all var(--transition-normal);
    border-radius: 0 6px 6px 0;
}

.sidebar-articles a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
    border-left-color: rgba(255, 107, 0, 0.3);
}

.sidebar-articles a.active {
    color: var(--accent);
    background: rgba(255, 107, 0, 0.08);
    border-left-color: var(--accent);
    font-weight: 600;
}

/* Mobile Sidebar Toggle */
.sidebar-toggle {
    display: none;
    align-items: center;
    gap: 8px;
    position: fixed;
    bottom: 20px;
    left: 20px;
    z-index: 90;
    background: var(--accent);
    color: white;
    border: none;
    padding: 12px 18px;
    border-radius: 28px;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(255, 107, 0, 0.4);
    transition: all var(--transition-normal);
}

.sidebar-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 107, 0, 0.5);
}

/* =============================================================================
   Main Content Area
   ============================================================================= */

.docs-main {
    flex: 1;
    min-width: 0;
}

/* =============================================================================
   Breadcrumbs
   ============================================================================= */

.docs-breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 28px;
    font-size: 0.875rem;
    flex-wrap: wrap;
}

.docs-breadcrumbs a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.docs-breadcrumbs a:hover {
    color: var(--accent);
}

.docs-breadcrumbs .separator {
    color: var(--text-muted);
    opacity: 0.5;
}

.docs-breadcrumbs .current {
    color: var(--text-secondary);
    font-weight: 500;
}

/* =============================================================================
   Docs Home - Header & Search
   ============================================================================= */

.docs-home-header {
    text-align: center;
    padding: 40px 0 48px;
}

.docs-home-title {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 50%, var(--accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.docs-home-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 550px;
    margin: 0 auto 36px;
    line-height: 1.7;
}

.docs-home-search {
    position: relative;
    max-width: 560px;
    margin: 0 auto;
}

.docs-home-search .search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    z-index: 1;
}

.docs-home-search input {
    width: 100%;
    padding: 16px 80px 16px 50px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    outline: none;
    transition: all var(--transition-normal);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

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

.docs-home-search input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(255, 107, 0, 0.1), 0 0 30px rgba(255, 107, 0, 0.08);
}

.docs-home-search .search-kbd {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    gap: 4px;
    pointer-events: none;
}

.docs-home-search .kbd-key {
    display: inline-block;
    padding: 3px 7px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    line-height: 1;
}

.docs-home-search .kbd-plus {
    font-size: 0.65rem;
    color: var(--text-muted);
}

.docs-home-search .search-results-dropdown {
    text-align: left;
}

/* =============================================================================
   Docs Home - Category Cards Grid
   ============================================================================= */

.docs-home-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding-bottom: 40px;
}

.docs-category-card {
    display: flex;
    flex-direction: column;
    padding: 28px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.docs-category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.docs-category-card:hover {
    border-color: var(--glass-border-hover, rgba(255, 107, 0, 0.35));
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(255, 107, 0, 0.05);
}

.docs-category-card:hover::before {
    opacity: 1;
}

.docs-card-icon {
    width: 40px;
    height: 40px;
    color: var(--accent);
    margin-bottom: 16px;
}

.docs-card-icon svg {
    width: 100%;
    height: 100%;
}

.docs-card-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.docs-category-card:hover .docs-card-title {
    color: var(--accent);
}

.docs-card-description {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    flex: 1;
    margin-bottom: 16px;
}

.docs-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.docs-card-count {
    font-family: var(--font-display);
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.docs-card-arrow {
    color: var(--text-muted);
    transition: all var(--transition-normal);
}

.docs-category-card:hover .docs-card-arrow {
    color: var(--accent);
    transform: translateX(4px);
}

/* =============================================================================
   Category Page - Article Listing
   ============================================================================= */

.docs-category-header {
    margin-bottom: 32px;
}

.docs-category-title {
    font-family: var(--font-display);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.docs-category-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.docs-article-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.docs-article-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 24px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.docs-article-item:hover {
    border-color: var(--glass-border-hover, rgba(255, 107, 0, 0.35));
    transform: translateX(4px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.docs-article-item-number {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.4;
    min-width: 32px;
    text-align: center;
}

.docs-article-item:hover .docs-article-item-number {
    opacity: 1;
}

.docs-article-item-body {
    flex: 1;
    min-width: 0;
}

.docs-article-item-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.docs-article-item:hover .docs-article-item-title {
    color: var(--accent);
}

.docs-article-item-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.docs-article-item-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.docs-article-item-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.docs-article-item-tags {
    display: flex;
    gap: 6px;
}

.docs-tag-sm {
    display: inline-block;
    padding: 2px 8px;
    background: rgba(255, 107, 0, 0.08);
    border: 1px solid rgba(255, 107, 0, 0.15);
    border-radius: 4px;
    font-size: 0.7rem;
    color: var(--accent);
    font-family: var(--font-mono);
}

.docs-article-item-arrow {
    color: var(--text-muted);
    flex-shrink: 0;
    transition: all var(--transition-normal);
}

.docs-article-item:hover .docs-article-item-arrow {
    color: var(--accent);
    transform: translateX(4px);
}

/* =============================================================================
   Article Page
   ============================================================================= */

.docs-article-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.docs-article-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.2;
}

.docs-article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.875rem;
}

.docs-meta-category {
    display: inline-block;
    padding: 3px 12px;
    background: rgba(255, 107, 0, 0.1);
    border: 1px solid rgba(255, 107, 0, 0.2);
    border-radius: 20px;
    color: var(--accent);
    text-decoration: none;
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-normal);
}

.docs-meta-category:hover {
    background: rgba(255, 107, 0, 0.2);
    border-color: var(--accent);
}

.docs-meta-separator {
    color: var(--text-muted);
}

.docs-meta-date {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
}

.docs-meta-date svg {
    flex-shrink: 0;
}

.docs-meta-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.docs-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

/* Floating Table of Contents */
.docs-toc-floating {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    margin-bottom: 32px;
    overflow: hidden;
}

.docs-toc-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 14px 18px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.docs-toc-toggle:hover {
    color: var(--accent);
}

.docs-toc-toggle .toc-chevron {
    margin-left: auto;
    transition: transform var(--transition-normal);
}

.docs-toc-toggle[aria-expanded="false"] .toc-chevron {
    transform: rotate(-90deg);
}

.docs-toc-list {
    padding: 0 18px 14px;
}

.docs-toc-list.collapsed {
    display: none;
}

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

.docs-toc-list li {
    margin: 0;
}

.docs-toc-list li::before {
    display: none;
}

.docs-toc-list li a {
    display: block;
    padding: 5px 0 5px 12px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    line-height: 1.5;
    border-left: 2px solid transparent;
    transition: all var(--transition-normal);
}

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

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

.docs-toc-list .toc-level-3 a {
    padding-left: 28px;
}

.docs-toc-list .toc-level-4 a {
    padding-left: 44px;
    font-size: 0.8rem;
}

/* =============================================================================
   Right Sidebar: Table of Contents
   ============================================================================= */

.docs-toc-sidebar {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: 100px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 107, 0, 0.2) transparent;
}

.docs-toc-sidebar::-webkit-scrollbar {
    width: 3px;
}

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

.docs-toc-sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 107, 0, 0.2);
    border-radius: 2px;
}

.docs-toc-sidebar-title {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    padding: 0 0 10px;
    margin-bottom: 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.docs-toc-sidebar .docs-toc-list {
    padding: 0;
}

.docs-toc-sidebar .docs-toc-list li a {
    font-size: 0.8rem;
    padding: 4px 0 4px 12px;
}

.docs-toc-sidebar .docs-toc-list .toc-level-3 a {
    padding-left: 24px;
    font-size: 0.75rem;
}

.docs-toc-sidebar .docs-toc-list .toc-level-4 a {
    padding-left: 36px;
    font-size: 0.72rem;
}

/* Mobile ToC wrapper - hidden on desktop, shown when right sidebar hidden */
.docs-toc-mobile {
    display: none;
}

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

.docs-article-content h2 {
    margin-top: 48px;
}

.docs-article-content h2:first-child {
    margin-top: 0;
}

/* =============================================================================
   Search Results Page
   ============================================================================= */

.docs-search-results-page {
    max-width: 800px;
}

.docs-search-header {
    margin-bottom: 28px;
}

.docs-search-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.docs-search-query {
    color: var(--accent);
}

.docs-search-count {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.docs-search-form {
    margin-bottom: 32px;
}

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

.docs-search-input-wrap .search-icon {
    position: absolute;
    left: 14px;
    color: var(--text-muted);
    pointer-events: none;
}

.docs-search-input-wrap input {
    width: 100%;
    padding: 14px 50px 14px 44px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    outline: none;
    transition: all var(--transition-normal);
}

.docs-search-input-wrap input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.1);
}

.docs-search-submit {
    position: absolute;
    right: 8px;
    background: var(--accent);
    border: none;
    color: white;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.docs-search-submit:hover {
    background: var(--accent-light);
}

/* Search Result Items */
.docs-results-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.docs-result-item {
    display: block;
    padding: 20px 24px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.docs-result-item:hover {
    border-color: var(--glass-border-hover, rgba(255, 107, 0, 0.35));
    transform: translateX(4px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.docs-result-category {
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.docs-result-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.docs-result-item:hover .docs-result-title {
    color: var(--accent);
}

.docs-result-snippet {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 0;
}

.docs-result-excerpt {
    font-size: 0.825rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-top: 6px;
    margin-bottom: 0;
    font-style: italic;
}

.docs-result-excerpt mark {
    background: rgba(255, 107, 0, 0.2);
    color: var(--accent);
    padding: 1px 3px;
    border-radius: 2px;
}

/* =============================================================================
   Empty State
   ============================================================================= */

.docs-empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.docs-empty-state svg {
    margin-bottom: 16px;
    opacity: 0.4;
}

.docs-empty-state p {
    font-size: 1rem;
    margin-bottom: 8px;
}

.docs-empty-hint {
    font-size: 0.875rem;
    opacity: 0.7;
    margin-bottom: 20px;
}

/* =============================================================================
   Responsive: Medium screens (< 1200px) - Hide right ToC sidebar
   ============================================================================= */

@media (max-width: 1200px) {
    .docs-toc-sidebar {
        display: none;
    }

    .docs-toc-mobile {
        display: block;
    }
}

/* =============================================================================
   Responsive: Tablet (< 900px)
   ============================================================================= */

@media (max-width: 900px) {
    .docs-sidebar {
        position: fixed;
        top: 0;
        left: -320px;
        bottom: 0;
        z-index: 200;
        width: 300px;
        max-height: 100vh;
        border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
        transition: left var(--transition-normal);
        padding-top: 24px;
    }

    .docs-sidebar.open {
        left: 0;
    }

    .sidebar-close {
        display: block;
    }

    .sidebar-toggle {
        display: flex;
    }

    .docs-sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 199;
    }

    .docs-sidebar-overlay.active {
        display: block;
    }

    .docs-home-title {
        font-size: 2.25rem;
    }

    .docs-home-grid {
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    }
}

/* =============================================================================
   Responsive: Mobile (< 768px)
   ============================================================================= */

@media (max-width: 768px) {
    .docs-kb-layout {
        flex-direction: column;
        gap: 0;
    }

    .docs-main {
        max-width: 100%;
    }

    .docs-home-title {
        font-size: 2rem;
    }

    .docs-home-subtitle {
        font-size: 1rem;
    }

    .docs-home-search input {
        padding: 14px 16px 14px 44px;
        font-size: 0.9rem;
    }

    .docs-home-search .search-kbd {
        display: none;
    }

    .docs-home-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .docs-category-card {
        padding: 22px;
    }

    .docs-article-title {
        font-size: 1.875rem;
    }

    .docs-article-meta {
        gap: 6px;
    }

    .docs-article-item {
        padding: 16px 18px;
        gap: 14px;
    }

    .docs-article-item-number {
        display: none;
    }

    .docs-category-title {
        font-size: 1.75rem;
    }

    .docs-search-title {
        font-size: 1.35rem;
    }
}

/* =============================================================================
   Responsive: Small Mobile (< 480px)
   ============================================================================= */

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

    .docs-article-title {
        font-size: 1.5rem;
    }
}