/* ============================================
   ENTERPRISE KNOWLEDGE BASE STYLES
   Inspired by: Stripe Docs, Linear, Notion
   ============================================ */

/* ========== CSS Variables ========== */
:root {
    --kb-bg: #ffffff;
    --kb-surface: #f8fafc;
    --kb-border: #e2e8f0;
    --kb-text-primary: #1e293b;
    --kb-text-secondary: #64748b;
    --kb-text-muted: #94a3b8;
    --kb-accent: #3B82F6;
    --kb-accent-hover: #2563EB;
    --kb-success: #10B981;
    --kb-warning: #F59E0B;
    --kb-danger: #EF4444;

    /* Sidebar */
    --kb-sidebar-width: 280px;
    --kb-toc-width: 240px;

    /* Typography */
    --kb-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    --kb-font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', monospace;

    /* Shadows */
    --kb-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --kb-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --kb-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --kb-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --kb-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark theme */
.dark-theme {
    --kb-bg: #0f172a;
    --kb-surface: #1e293b;
    --kb-border: #334155;
    --kb-text-primary: #f1f5f9;
    --kb-text-secondary: #cbd5e1;
    --kb-text-muted: #64748b;
}

/* ========== Main Container ========== */
.kb-enterprise {
    font-family: var(--kb-font-sans);
    color: var(--kb-text-primary);
    background: var(--kb-bg);
    height: 100%;
    overflow: hidden;
}

/* ========== 3-Panel Layout ========== */
.kb-layout {
    display: grid;
    grid-template-columns: var(--kb-sidebar-width) 1fr var(--kb-toc-width);
    height: 100%;
    overflow: hidden;
}

/* ========== Left Sidebar (Navigation) ========== */
.kb-sidebar {
    background: var(--kb-surface);
    border-right: 1px solid var(--kb-border);
    overflow-y: auto;
    overflow-x: hidden;
}

.kb-sidebar-header {
    position: sticky;
    top: 0;
    background: var(--kb-surface);
    border-bottom: 1px solid var(--kb-border);
    padding: 1.5rem 1rem;
    z-index: 10;
}

.kb-sidebar-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 1rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--kb-text-primary);
}

.kb-search-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--kb-bg);
    border: 1px solid var(--kb-border);
    border-radius: 0.5rem;
    color: var(--kb-text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    transition: var(--kb-transition);
}

.kb-search-trigger:hover {
    border-color: var(--kb-accent);
    color: var(--kb-text-primary);
}

.kb-search-trigger kbd {
    margin-left: auto;
    padding: 0.125rem 0.375rem;
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-family: var(--kb-font-mono);
}

/* Navigation Tree */
.kb-nav {
    padding: 0.5rem;
}

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

.kb-nav-section-header {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: none;
    border-radius: 0.375rem;
    color: var(--kb-text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--kb-transition);
    text-align: left;
}

.kb-nav-section-header:hover {
    background: var(--kb-bg);
}

.kb-nav-section-header.expanded {
    color: var(--kb-accent);
}

.kb-nav-icon {
    font-size: 1.125rem;
}

.kb-nav-title {
    flex: 1;
}

.kb-nav-section-header i {
    font-size: 0.75rem;
    color: var(--kb-text-muted);
    transition: var(--kb-transition);
}

.kb-nav-section-header.expanded i {
    transform: rotate(0deg);
}

.kb-nav-items {
    padding-left: 2rem;
    margin-top: 0.25rem;
}

.kb-nav-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    color: var(--kb-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: 0.375rem;
    transition: var(--kb-transition);
    margin-bottom: 0.125rem;
}

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

.kb-nav-item.active {
    background: var(--kb-accent);
    color: white;
    font-weight: 500;
}

.favorite-indicator {
    margin-left: auto;
    color: var(--kb-warning);
    font-size: 0.75rem;
}

/* ========== Main Content Area ========== */
.kb-main {
    overflow-y: auto;
    overflow-x: hidden;
    padding: 2rem 3rem;
    max-width: 900px;
}

/* Breadcrumbs */
.kb-breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
    margin-bottom: 2rem;
}

.kb-breadcrumbs a {
    color: var(--kb-text-secondary);
    text-decoration: none;
    transition: var(--kb-transition);
}

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

.kb-breadcrumbs .active {
    color: var(--kb-text-primary);
    font-weight: 500;
}

.kb-breadcrumbs i {
    font-size: 0.75rem;
}

/* ========== Home View ========== */
.kb-home-header {
    margin-bottom: 3rem;
}

.kb-home-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
    color: var(--kb-text-primary);
}

.kb-home-header p {
    font-size: 1.125rem;
    color: var(--kb-text-secondary);
    margin: 0;
}

.kb-home-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.kb-home-card {
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-left: 4px solid;
    border-radius: 0.5rem;
    padding: 1.5rem;
    transition: var(--kb-transition);
}

.kb-home-card:hover {
    box-shadow: var(--kb-shadow-md);
    transform: translateY(-2px);
}

.kb-home-card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.kb-home-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 0.5rem 0;
    color: var(--kb-text-primary);
}

.kb-home-card p {
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
    margin: 0 0 1rem 0;
}

.kb-home-card-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.kb-home-card-links a {
    color: var(--kb-accent);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--kb-transition);
}

.kb-home-card-links a:hover {
    color: var(--kb-accent-hover);
    text-decoration: underline;
}

.kb-home-section {
    margin-bottom: 3rem;
}

.kb-home-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 1rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--kb-text-primary);
}

.kb-recent-list,
.kb-popular-list {
    display: grid;
    gap: 0.75rem;
}

.kb-recent-item,
.kb-popular-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: 0.5rem;
    text-decoration: none;
    transition: var(--kb-transition);
}

.kb-recent-item:hover,
.kb-popular-item:hover {
    border-color: var(--kb-accent);
    box-shadow: var(--kb-shadow-sm);
}

.kb-recent-item i,
.kb-popular-item i {
    color: var(--kb-accent);
    font-size: 1.25rem;
}

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

.kb-recent-category,
.kb-popular-views {
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
}

/* ========== Document View ========== */
.kb-document {
    max-width: 800px;
}

.kb-doc-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--kb-border);
}

.kb-doc-header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    color: var(--kb-text-primary);
    line-height: 1.2;
}

.kb-doc-meta {
    display: flex;
    gap: 0.75rem;
}

.kb-doc-action {
    padding: 0.5rem 1rem;
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: 0.375rem;
    color: var(--kb-text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--kb-transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.kb-doc-action:hover {
    border-color: var(--kb-accent);
    color: var(--kb-accent);
}

.kb-doc-action .favorited {
    color: var(--kb-warning);
}

/* Document Content */
.kb-doc-content {
    line-height: 1.75;
    font-size: 1rem;
    color: var(--kb-text-primary);
}

.kb-doc-content h1 {
    font-size: 2rem;
    font-weight: 700;
    margin: 2.5rem 0 1rem 0;
    color: var(--kb-text-primary);
}

.kb-doc-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 2rem 0 1rem 0;
    color: var(--kb-text-primary);
    padding-top: 1rem;
    border-top: 1px solid var(--kb-border);
}

.kb-doc-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem 0;
    color: var(--kb-text-primary);
}

.kb-doc-content p {
    margin: 1rem 0;
}

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

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

.kb-doc-content ul,
.kb-doc-content ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.kb-doc-content li {
    margin: 0.5rem 0;
}

.kb-doc-content code {
    padding: 0.125rem 0.375rem;
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: 0.25rem;
    font-family: var(--kb-font-mono);
    font-size: 0.875em;
    color: var(--kb-accent);
}

.kb-doc-content pre {
    position: relative;
    margin: 1.5rem 0;
    padding: 1.5rem;
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: 0.5rem;
    overflow-x: auto;
}

.kb-doc-content pre code {
    padding: 0;
    background: transparent;
    border: none;
    color: var(--kb-text-primary);
    font-size: 0.875rem;
}

.kb-copy-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    padding: 0.375rem 0.75rem;
    background: var(--kb-bg);
    border: 1px solid var(--kb-border);
    border-radius: 0.375rem;
    color: var(--kb-text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--kb-transition);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

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

.kb-loading {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 3rem;
    color: var(--kb-text-secondary);
    justify-content: center;
}

.kb-error {
    text-align: center;
    padding: 3rem;
}

.kb-error i {
    font-size: 3rem;
    color: var(--kb-danger);
    margin-bottom: 1rem;
}

.kb-error h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 0.5rem 0;
    color: var(--kb-text-primary);
}

.kb-error p {
    color: var(--kb-text-secondary);
    margin: 0 0 1.5rem 0;
}

/* Document Footer */
.kb-doc-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--kb-border);
}

.kb-doc-helpful {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--kb-text-secondary);
    font-size: 0.875rem;
}

.kb-feedback-btn {
    padding: 0.5rem 1rem;
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: 0.375rem;
    color: var(--kb-text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--kb-transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.kb-feedback-btn:hover {
    border-color: var(--kb-success);
    color: var(--kb-success);
}

/* ========== Right Sidebar (TOC) ========== */
.kb-toc {
    background: var(--kb-surface);
    border-left: 1px solid var(--kb-border);
    overflow-y: auto;
    padding: 2rem 1.5rem;
}

.kb-toc-header h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--kb-text-muted);
    margin: 0 0 1rem 0;
}

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

.kb-toc-list li {
    margin-bottom: 0.5rem;
}

.kb-toc-list a {
    color: var(--kb-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--kb-transition);
    display: block;
    padding: 0.25rem 0;
    border-left: 2px solid transparent;
    padding-left: 0.75rem;
}

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

.kb-toc-list .level-3 {
    margin-left: 1rem;
}

.kb-toc-list .level-3 a {
    font-size: 0.8125rem;
    color: var(--kb-text-muted);
}

.kb-toc-empty {
    font-size: 0.875rem;
    color: var(--kb-text-muted);
    font-style: italic;
}

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

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

.kb-search-modal-content {
    width: 90%;
    max-width: 640px;
    background: var(--kb-bg);
    border-radius: 0.75rem;
    box-shadow: var(--kb-shadow-xl);
    overflow: hidden;
}

.kb-search-input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--kb-border);
}

.kb-search-input-wrapper i {
    color: var(--kb-text-muted);
    font-size: 1.25rem;
}

.kb-search-input-wrapper input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1.125rem;
    background: transparent;
    color: var(--kb-text-primary);
}

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

.kb-search-input-wrapper kbd {
    padding: 0.25rem 0.5rem;
    background: var(--kb-surface);
    border: 1px solid var(--kb-border);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-family: var(--kb-font-mono);
    color: var(--kb-text-muted);
}

.kb-search-results {
    max-height: 400px;
    overflow-y: auto;
}

.kb-search-results-list {
    padding: 0.5rem;
}

.kb-search-result-item {
    display: block;
    padding: 0.75rem 1rem;
    text-decoration: none;
    border-radius: 0.375rem;
    transition: var(--kb-transition);
    margin-bottom: 0.25rem;
}

.kb-search-result-item:hover {
    background: var(--kb-surface);
}

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

.kb-search-result-title mark {
    background: rgba(59, 130, 246, 0.2);
    color: var(--kb-accent);
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
}

.kb-search-result-category {
    font-size: 0.875rem;
    color: var(--kb-text-secondary);
}

.kb-search-empty {
    padding: 3rem 1.5rem;
    text-align: center;
    color: var(--kb-text-muted);
}

.kb-search-empty i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* ========== Responsive Design ========== */
@media (max-width: 1200px) {
    .kb-layout {
        grid-template-columns: var(--kb-sidebar-width) 1fr;
    }

    .kb-toc {
        display: none;
    }
}

@media (max-width: 768px) {
    .kb-layout {
        grid-template-columns: 1fr;
    }

    .kb-sidebar {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 320px;
        height: 100%;
        z-index: 100;
        transition: left 0.3s ease;
        box-shadow: var(--kb-shadow-xl);
    }

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

    .kb-main {
        padding: 1.5rem 1rem;
    }

    .kb-home-header h1 {
        font-size: 2rem;
    }

    .kb-home-grid {
        grid-template-columns: 1fr;
    }

    .kb-doc-header h1 {
        font-size: 1.75rem;
    }
}

/* ========== Scrollbar Styling ========== */
.kb-sidebar::-webkit-scrollbar,
.kb-main::-webkit-scrollbar,
.kb-toc::-webkit-scrollbar,
.kb-search-results::-webkit-scrollbar {
    width: 8px;
}

.kb-sidebar::-webkit-scrollbar-track,
.kb-main::-webkit-scrollbar-track,
.kb-toc::-webkit-scrollbar-track,
.kb-search-results::-webkit-scrollbar-track {
    background: transparent;
}

.kb-sidebar::-webkit-scrollbar-thumb,
.kb-main::-webkit-scrollbar-thumb,
.kb-toc::-webkit-scrollbar-thumb,
.kb-search-results::-webkit-scrollbar-thumb {
    background: var(--kb-border);
    border-radius: 4px;
}

.kb-sidebar::-webkit-scrollbar-thumb:hover,
.kb-main::-webkit-scrollbar-thumb:hover,
.kb-toc::-webkit-scrollbar-thumb:hover,
.kb-search-results::-webkit-scrollbar-thumb:hover {
    background: var(--kb-text-muted);
}

/* ========== Animations ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.kb-home-card,
.kb-recent-item,
.kb-popular-item {
    animation: fadeIn 0.3s ease;
}

/* ========== Print Styles ========== */
@media print {
    .kb-sidebar,
    .kb-toc,
    .kb-breadcrumbs,
    .kb-doc-meta,
    .kb-doc-footer,
    .kb-search-modal {
        display: none !important;
    }

    .kb-layout {
        grid-template-columns: 1fr;
    }

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

/* ========================================
   CMS FEATURES - ADMIN CONTROLS
   ======================================== */

/* Admin Controls Bar */
.kb-admin-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
}

.kb-admin-controls-left,
.kb-admin-controls-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.kb-admin-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.kb-toggle-edit {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.kb-toggle-edit:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.kb-toggle-edit.active {
    background: #10b981;
    border-color: #059669;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.kb-create-article-btn,
.kb-create-category-btn {
    padding: 0.5rem 1rem;
    background: white;
    border: none;
    border-radius: 6px;
    color: #667eea;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.kb-create-article-btn:hover,
.kb-create-category-btn:hover {
    background: #f3f4f6;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Delete Buttons in Navigation */
.kb-nav-section-header-wrapper,
.kb-nav-item-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.kb-delete-article-btn,
.kb-delete-category-btn {
    padding: 0.25rem 0.5rem;
    background: #ef4444;
    border: none;
    border-radius: 4px;
    color: white;
    font-size: 0.75rem;
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.kb-nav-item-wrapper:hover .kb-delete-article-btn,
.kb-nav-section-header-wrapper:hover .kb-delete-category-btn {
    opacity: 1;
}

.kb-delete-article-btn:hover,
.kb-delete-category-btn:hover {
    background: #dc2626;
    transform: scale(1.05);
}

/* ========================================
   MARKDOWN EDITOR
   ======================================== */

.kb-editor {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 250px);
    background: white;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    overflow: hidden;
}

.kb-editor-toolbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: #f9fafb;
    border-bottom: 1px solid #e5e7eb;
}

.kb-toolbar-btn {
    padding: 0.5rem;
    background: white;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    color: #374151;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 36px;
    justify-content: center;
}

.kb-toolbar-btn:hover {
    background: #f3f4f6;
    border-color: #9ca3af;
    color: #111827;
}

.kb-toolbar-btn:active {
    transform: scale(0.95);
}

.kb-toolbar-spacer {
    flex: 1;
}

.kb-preview-toggle {
    font-weight: 600;
    padding: 0.5rem 1rem;
}

.kb-preview-toggle.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.kb-editor-container {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr;
    overflow: hidden;
}

.kb-editor-container.split {
    grid-template-columns: 1fr 1fr;
}

.kb-editor-textarea {
    width: 100%;
    height: 100%;
    padding: 1.5rem;
    border: none;
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    resize: none;
    outline: none;
}

.kb-editor-textarea:focus {
    outline: none;
}

.kb-editor-preview {
    padding: 1.5rem;
    overflow-y: auto;
    background: #fafbfc;
    border-left: 1px solid #e5e7eb;
}

.kb-editor-preview h1,
.kb-editor-preview h2,
.kb-editor-preview h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.kb-editor-preview p {
    margin-bottom: 1rem;
}

.kb-editor-preview ul,
.kb-editor-preview ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.kb-editor-preview code {
    background: #f3f4f6;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Fira Code', monospace;
    font-size: 0.875em;
}

.kb-editor-preview pre {
    background: #1f2937;
    color: #f9fafb;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.kb-editor-preview pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.kb-editor-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: #f9fafb;
    border-top: 1px solid #e5e7eb;
}

/* ========================================
   MODAL DIALOGS
   ======================================== */

.kb-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: 1rem;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.kb-modal-content {
    background: white;
    border-radius: 12px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.kb-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.kb-modal-header h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: #111827;
}

.kb-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #6b7280;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.kb-modal-close:hover {
    background: #f3f4f6;
    color: #111827;
}

.kb-modal-body {
    padding: 1.5rem;
}

.kb-form-group {
    margin-bottom: 1.25rem;
}

.kb-form-group:last-child {
    margin-bottom: 0;
}

.kb-form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #374151;
    font-size: 0.875rem;
}

.kb-form-group input[type="text"],
.kb-form-group select,
.kb-form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.kb-form-group input[type="text"]:focus,
.kb-form-group select:focus,
.kb-form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.kb-form-group input[type="color"] {
    width: 100%;
    height: 48px;
    padding: 0.25rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    cursor: pointer;
}

.kb-form-group small {
    display: block;
    margin-top: 0.375rem;
    color: #6b7280;
    font-size: 0.75rem;
}

.kb-modal-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1.5rem;
    border-top: 1px solid #e5e7eb;
    background: #f9fafb;
}

/* ========================================
   BUTTON STYLES FOR MODALS
   ======================================== */

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, #17afa5, #0d8b82);
    color: white;
    border-color: #17afa5;
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, #1fc4b8, #17afa5);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(23, 175, 165, 0.3);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: white;
    color: #374151;
    border: 1px solid #d1d5db;
}

.btn-secondary:hover:not(:disabled) {
    background: #f9fafb;
    border-color: #9ca3af;
}

.btn-danger {
    background: #ef4444;
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(239, 68, 68, 0.25);
}

/* ========================================
   EDIT MODE INDICATORS
   ======================================== */

.kb-doc-header.edit-mode {
    border-left: 4px solid #10b981;
    padding-left: 1.5rem;
}

.kb-nav-section.edit-mode {
    background: rgba(16, 185, 129, 0.05);
}

/* ========================================
   RESPONSIVE STYLES FOR CMS
   ======================================== */

@media (max-width: 768px) {
    .kb-admin-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .kb-admin-controls-left,
    .kb-admin-controls-right {
        flex-direction: column;
        width: 100%;
    }

    .kb-toggle-edit,
    .kb-create-article-btn,
    .kb-create-category-btn {
        width: 100%;
        justify-content: center;
    }

    .kb-editor {
        height: calc(100vh - 200px);
    }

    .kb-editor-container.split {
        grid-template-columns: 1fr;
    }

    .kb-editor-preview {
        display: none;
    }

    .kb-modal-content {
        margin: 0;
        border-radius: 8px;
    }

    .kb-modal-actions {
        flex-direction: column-reverse;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}