:root {
    --primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-solid: #667eea;
    --secondary: #6c757d;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --light: #f8f9fa;
    --dark: #343a40;
    --border: #dee2e6;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Kanit', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 100%;
    margin: 0;
    background: white;
    min-height: 100vh;
    box-shadow: none;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    background: var(--primary);
    color: white;
    padding: 1.5rem 2rem;
    box-shadow: 0 2px 10px var(--shadow);
    position: relative;
    z-index: 1;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-brands {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 0 auto;
}

.header-brand-logo {
    max-width: var(--logo-max-width);
    max-height: var(--logo-max-height);
    width: auto;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.brand-separator {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 300;
}

.header-title-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* โลโก้ WD - ไม่ใช้ filter */
.winday-logo svg {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2)) !important;
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 0;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-danger {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: white;
    color: var(--primary-solid);
    border: 2px solid var(--primary-solid);
}

.btn-secondary:hover {
    background: var(--light);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-sm {
    padding: 0.4375rem 0.875rem;
    font-size: 0.875rem;
}

/* Brand Tabs */
.brand-tabs {
    display: flex;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--light);
    border-bottom: 2px solid var(--border);
}

.tab-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: white;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 60px;
}

.tab-btn:hover {
    border-color: var(--primary-solid);
    background: #f8f9ff;
}

.tab-btn.active {
    background: var(--primary);
    color: white;
    border-color: transparent;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.brand-logo {
    height: 40px;
    width: auto;
    max-width: 180px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}


.tab-btn.active .brand-logo {
    filter: brightness(0) invert(1) drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.tab-icon {
    font-size: 1.25rem;
    display: none;
}

/* File Management Bar */
.file-management-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: white;
    border-bottom: 2px solid var(--border);
    gap: 1rem;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
    color: var(--dark);
}

.file-count {
    padding: 0.25rem 0.75rem;
    background: var(--light);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-solid);
}

/* Auto-load Toggle Switch */
.auto-load-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
    position: relative;
}

.auto-load-toggle input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
    background: #ccc;
    border-radius: 24px;
    transition: background 0.3s ease;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    left: 3px;
    top: 3px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.auto-load-toggle input:checked+.toggle-slider {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auto-load-toggle input:checked+.toggle-slider::before {
    transform: translateX(24px);
}

.toggle-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--dark);
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-upload,
.btn-download,
.btn-download-local,
.btn-sync,
.btn-save-drive,
.btn-google-auth,
.file-actions label.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    background: white;
    text-decoration: none;
}

.btn-upload:hover,
.btn-download:hover,
.btn-download-local:hover,
.btn-sync:hover,
.btn-save-drive:hover,
.btn-google-auth:hover,
.file-actions label.btn-secondary:hover {
    border-color: var(--primary-solid);
    background: #f8f9ff;
    transform: translateY(-2px);
}

.btn-upload {
    color: var(--success);
    border-color: var(--success);
}

.btn-upload:hover {
    background: #d4edda;
    border-color: var(--success);
}

.btn-download {
    color: var(--primary-solid);
    border-color: var(--primary-solid);
}

.btn-download-local {
    color: var(--primary-solid);
    border-color: var(--primary-solid);
}

.btn-download-local:hover {
    background: #f8f9ff;
    border-color: var(--primary-solid);
}

.file-actions label.btn-secondary {
    color: #6c757d;
    border-color: #6c757d;
}

.file-actions label.btn-secondary:hover {
    background: #f8f9fa;
    border-color: #6c757d;
}

.btn-sync {
    color: var(--warning);
    border-color: var(--warning);
}

.btn-sync:hover {
    background: #fff3cd;
    border-color: var(--warning);
}

.btn-save-drive {
    color: #0F9D58;
    border-color: #0F9D58;
}

.btn-save-drive:hover {
    background: #e8f5e9;
    border-color: #0F9D58;
}

.btn-google-auth {
    color: #4285F4;
    border-color: #4285F4;
}

.btn-google-auth:hover {
    background: #e3f2fd;
    border-color: #4285F4;
}

.btn-google-auth svg {
    fill: #4285F4;
}

/* Main Content Layout */
.main-content {
    display: grid;
    grid-template-columns: 350px 1fr;
    min-height: calc(100vh - 240px);
}

/* Sidebar */
.faq-sidebar {
    background: var(--light);
    border-right: 2px solid var(--border);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 2px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h2 {
    font-size: 1.125rem;
    color: var(--dark);
}

.search-box {
    padding: 1rem 1.5rem;
    border-bottom: 2px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: white;
}

.search-box svg {
    color: var(--secondary);
}

.search-box input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 0.9375rem;
}

.faq-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
    max-height: calc(100vh - 340px);
    min-height: 400px;
}

/* Custom Scrollbar for FAQ List */
.faq-list::-webkit-scrollbar {
    width: 10px;
}

.faq-list::-webkit-scrollbar-track {
    background: #f1f3f9;
    border-radius: 10px;
    margin: 5px 0;
}

.faq-list::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    border: 2px solid #f1f3f9;
}

.faq-list::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #764ba2 0%, #667eea 100%);
}

/* Topic Group (Collapsible) */
.faq-topic-group {
    background: white;
    border: 2px solid var(--border);
    border-radius: 10px;
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.faq-topic-group:hover {
    border-color: var(--primary-solid);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
    transform: translateY(-2px);
}

.faq-topic-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    cursor: pointer;
    background: linear-gradient(135deg, #667eea10 0%, #764ba210 100%);
    transition: background 0.3s ease;
}

.faq-topic-header:hover {
    background: linear-gradient(135deg, #667eea20 0%, #764ba220 100%);
}

.faq-topic-header.active {
    background: linear-gradient(135deg, #667eea25 0%, #764ba225 100%);
}

.faq-topic-title {
    font-weight: 700;
    font-size: 1rem;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.faq-topic-icon {
    font-size: 1.25rem;
}

.faq-topic-count {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--secondary);
    font-weight: 500;
}

.faq-topic-arrow {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.faq-topic-header.active .faq-topic-arrow {
    transform: rotate(180deg);
}

.faq-topic-items {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-topic-items.expanded {
    max-height: 2000px;
}

.faq-item {
    background: white;
    border: none;
    border-top: 1px solid var(--border);
    border-radius: 0;
    padding: 0.875rem 1.25rem;
    margin-bottom: 0;
    cursor: pointer;
    transition: all 0.2s ease;
}

.faq-item:first-child {
    border-top: none;
}

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

.faq-item:hover {
    background: #f8f9fa;
    border-color: var(--border);
    box-shadow: none;
}

.faq-item.active {
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
    border-color: var(--border);
}

.faq-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0;
}

.faq-item-title {
    flex: 1;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--dark);
    line-height: 1.5;
}

.faq-item-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.6875rem;
    font-weight: 600;
    white-space: nowrap;
}

.badge-active {
    background: #d4edda;
    color: #155724;
}

.badge-inactive {
    background: #f8d7da;
    color: #721c24;
}

.faq-item-category {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8125rem;
    color: var(--secondary);
    padding: 0.125rem 0.5rem;
    background: var(--light);
    border-radius: 4px;
}

.loading {
    text-align: center;
    padding: 2rem;
    color: var(--secondary);
}

/* Editor Area */
.faq-editor {
    overflow-y: auto;
    padding: 2rem;
    min-height: calc(100vh - 240px);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--secondary);
    text-align: center;
}

.empty-state svg {
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.empty-state p {
    font-size: 1rem;
}

.editor-content {
    max-width: 900px;
    min-height: 100%;
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border);
}

.editor-header h2 {
    font-size: 1.5rem;
    color: var(--dark);
}

.editor-actions {
    display: flex;
    gap: 0.5rem;
}

.editor-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    background: #f8f9ff;
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid #e8ebf7;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--dark);
    font-size: 0.9375rem;
}

.form-group label svg {
    color: var(--primary-solid);
}

.form-group input[type="text"],
.form-group textarea,
.form-group select {
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 0.9375rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 80px;
    max-height: 250px;
    background: #fafbff;
}

.form-group textarea:focus {
    background: white;
}

.form-group small {
    color: var(--secondary);
    font-size: 0.8125rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background 0.2s;
}

.checkbox-label:hover {
    background: var(--light);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-preview {
    margin: 0;
    padding: 0;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    border: 1px solid #e8ebf7;
}

.form-preview h4 {
    margin: 0;
    padding: 1rem 1.25rem;
    color: var(--dark);
    font-size: 0.95rem;
    background: linear-gradient(135deg, #f8f9ff 0%, #e8ebf7 100%);
    border-radius: 8px 8px 0 0;
    border-bottom: 2px solid #e0e4f5;
}

.preview-content {
    padding: 1.25rem;
    background: white;
    border-radius: 0 0 8px 8px;
    min-height: 120px;
    max-height: 400px;
    overflow-y: auto;
    line-height: 1.7;
    word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: pre-wrap;
}

.preview-content em {
    color: var(--secondary);
    font-style: italic;
}

.preview-content a {
    color: var(--primary-solid);
    text-decoration: underline;
    word-break: break-all;
}

/* Scrollbar for Preview */
.preview-content::-webkit-scrollbar {
    width: 8px;
}

.preview-content::-webkit-scrollbar-track {
    background: #f8f9ff;
    border-radius: 4px;
}

.preview-content::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
}

.preview-content::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #764ba2 0%, #667eea 100%);
}

/* Scrollbar Styling */
.faq-list::-webkit-scrollbar,
.faq-editor::-webkit-scrollbar {
    width: 8px;
}

.faq-list::-webkit-scrollbar-track,
.faq-editor::-webkit-scrollbar-track {
    background: var(--light);
}

.faq-list::-webkit-scrollbar-thumb,
.faq-editor::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.faq-list::-webkit-scrollbar-thumb:hover,
.faq-editor::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}

/* Responsive */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 300px 1fr;
    }
}

@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .faq-sidebar {
        height: 300px;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .header-brands {
        order: -1;
        margin: 0;
    }

    .header-brand-logo {
        max-width: 150px;
        max-height: 40px;
    }

    .brand-tabs {
        overflow-x: auto;
        gap: 0.75rem;
    }

    .tab-btn {
        min-width: 140px;
        padding: 0.5rem 1rem;
        min-height: 50px;
    }

    .brand-logo {
        height: 32px;
        max-width: 140px;
    }


    .file-management-bar {
        flex-direction: column;
        gap: 0.75rem;
    }

    .file-actions {
        width: 100%;
        flex-wrap: wrap;
    }

    .btn-upload,
    .btn-download,
    .btn-sync {
        flex: 1;
        justify-content: center;
    }
}

/* ==================== DARK MODE ==================== */
body.dark-mode {
    background: #2d3748;
    color: #ffffff;
}

body.dark-mode .container {
    background: #2d3748;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
}

body.dark-mode .header {
    background: linear-gradient(135deg, rgba(45, 90, 123, 0.6) 0%, rgba(61, 77, 92, 0.6) 100%);
}

body.dark-mode .faq-form {
    background: #2d2d2d;
    border-color: #3d3d3d;
}

body.dark-mode .form-group input,
body.dark-mode .form-group select,
body.dark-mode .form-group textarea {
    background: #1e1e1e;
    border-color: #3d3d3d;
    color: #e0e0e0;
}

body.dark-mode .form-group input:focus,
body.dark-mode .form-group select:focus,
body.dark-mode .form-group textarea:focus {
    border-color: #667eea;
    background: #252525;
}

body.dark-mode .faq-list-section {
    background: #2d2d2d;
}

body.dark-mode .faq-item {
    background: #1e1e1e;
    border-color: #3d3d3d;
}

body.dark-mode .faq-item:hover {
    background: #252525;
    border-color: #667eea;
}

body.dark-mode .faq-question {
    color: #ffffff;
    font-weight: 600;
}

body.dark-mode .faq-answer {
    color: #e0e0e0;
}

body.dark-mode .language-badge {
    background: #3d3d3d;
    color: #e0e0e0;
}

body.dark-mode .category-badge {
    background: #667eea;
}

body.dark-mode .btn-edit {
    background: #3d3d3d;
    color: #e0e0e0;
}

body.dark-mode .btn-edit:hover {
    background: #4d4d4d;
}

body.dark-mode .btn-delete:hover {
    background: #c82333;
}

body.dark-mode .empty-state {
    color: #808080;
}

body.dark-mode .stats-grid {
    background: #2d2d2d;
}

body.dark-mode .stat-card {
    background: #1e1e1e;
    border-color: #3d3d3d;
}

body.dark-mode .stat-card:hover {
    background: #252525;
    border-color: #667eea;
}

body.dark-mode .search-box {
    background: rgba(45, 90, 123, 0.3);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

body.dark-mode .search-box svg {
    color: #ffffff;
}

body.dark-mode .search-box input {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
}

body.dark-mode .search-box input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

body.dark-mode .search-box input:focus {
    background: rgba(255, 255, 255, 0.12);
    border-color: #667eea;
    color: #ffffff;
}

body.dark-mode .filter-group select {
    background: #1e1e1e;
    border-color: #3d3d3d;
    color: #e0e0e0;
}

/* เพิ่ม Dark Mode สำหรับส่วนที่ขาดไป */
body.dark-mode .brand-tabs {
    background: rgba(45, 90, 123, 0.3);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

body.dark-mode .tab-btn {
    background: #1e1e1e;
    color: #ffffff;
    border-color: #3d3d3d;
}

body.dark-mode .tab-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: #667eea;
}

body.dark-mode .tab-btn.coming-soon {
    background: #252525;
    color: #666;
}

body.dark-mode .file-management-bar {
    background: rgba(45, 90, 123, 0.3);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

body.dark-mode .file-status {
    color: #ffffff;
}

body.dark-mode .file-count {
    background: transparent;
    color: #ffffff;
    border: none;
}

body.dark-mode .auto-load-toggle .toggle-label {
    color: #ffffff;
}

body.dark-mode .toggle-slider {
    background-color: #3d3d3d;
}

body.dark-mode .faq-sidebar {
    background: rgba(45, 90, 123, 0.2);
    border-right-color: rgba(255, 255, 255, 0.1);
}

body.dark-mode .sidebar-header {
    background: rgba(45, 90, 123, 0.3);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

body.dark-mode .sidebar-header h2 {
    color: #ffffff;
}

body.dark-mode .faq-list {
    background: rgba(45, 90, 123, 0.2);
}

body.dark-mode .faq-topic-group {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
}

body.dark-mode .faq-topic-group:hover {
    background: #252525;
    border-color: #667eea;
}

body.dark-mode .faq-topic-header {
    background: rgba(45, 90, 123, 0.3);
    color: #ffffff;
}

body.dark-mode .faq-topic-title {
    color: #ffffff;
    font-weight: 700;
}

body.dark-mode .faq-topic-count {
    color: #ffffff;
}

body.dark-mode .faq-topic-arrow {
    color: #ffffff;
}

body.dark-mode .faq-item {
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.15);
}

body.dark-mode .faq-item-title {
    color: #ffffff;
    font-weight: 500;
}

body.dark-mode .faq-item-category {
    color: #b0b0b0;
}

body.dark-mode .faq-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

body.dark-mode .faq-item.active {
    background: rgba(102, 126, 234, 0.4);
    color: white;
}

body.dark-mode .faq-item.active .faq-item-title {
    color: white;
}

body.dark-mode .faq-editor {
    background: rgba(45, 90, 123, 0.15);
}

body.dark-mode .empty-state {
    color: #808080;
}

body.dark-mode .empty-state h3 {
    color: #a0a0a0;
}

body.dark-mode .empty-state p {
    color: #707070;
}

body.dark-mode .editor-content {
    background: rgba(45, 90, 123, 0.15);
}

body.dark-mode .editor-header {
    background: rgba(45, 90, 123, 0.3);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

body.dark-mode .editor-header h2 {
    color: #ffffff;
}

body.dark-mode .editor-form {
    background: rgba(45, 90, 123, 0.2);
}

body.dark-mode .form-group {
    background: rgba(255, 255, 255, 0.05);
}

body.dark-mode .form-group label {
    color: #ffffff;
}

body.dark-mode .form-group textarea,
body.dark-mode .form-group input,
body.dark-mode .form-group select {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    color: #ffffff;
}

body.dark-mode .form-group textarea:focus,
body.dark-mode .form-group input:focus,
body.dark-mode .form-group select:focus {
    border-color: #667eea;
    background: #2d2d2d;
}

body.dark-mode .form-group small {
    color: #999;
}

body.dark-mode .form-preview {
    background: #1e1e1e;
}

body.dark-mode .form-preview h4 {
    background: linear-gradient(135deg, rgba(45, 90, 123, 0.5) 0%, rgba(61, 77, 92, 0.5) 100%);
    color: #ffffff;
    font-weight: 600;
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

body.dark-mode .preview-content {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
}

body.dark-mode .preview-content em {
    color: #999;
}

body.dark-mode .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

body.dark-mode .btn-secondary:hover {
    background: #4d4d4d;
}

body.dark-mode .btn-download,
body.dark-mode .btn-save-drive,
body.dark-mode .btn-download-local {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.2);
}

body.dark-mode .btn-download:hover,
body.dark-mode .btn-save-drive:hover,
body.dark-mode .btn-download-local:hover {
    background: #4d4d4d;
    border-color: #667eea;
}

body.dark-mode .checkbox-label {
    color: #ffffff;
}

body.dark-mode .checkbox-label input:checked+span {
    color: #ffffff;
}

/* Scrollbar Dark Mode */
body.dark-mode .faq-list::-webkit-scrollbar-track,
body.dark-mode .faq-editor::-webkit-scrollbar-track,
body.dark-mode .preview-content::-webkit-scrollbar-track {
    background: #1e1e1e;
}

body.dark-mode .faq-list::-webkit-scrollbar-thumb,
body.dark-mode .faq-editor::-webkit-scrollbar-thumb,
body.dark-mode .preview-content::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body.dark-mode .faq-list::-webkit-scrollbar-thumb:hover,
body.dark-mode .faq-editor::-webkit-scrollbar-thumb:hover,
body.dark-mode .preview-content::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

/* ======================================
   RESPONSIVE DESIGN - MOBILE
   ====================================== */

/* Tablet and below (≤ 1024px) */
@media (max-width: 1024px) {
    .header {
        padding: 1rem 1.5rem;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .header-actions {
        gap: 8px;
    }

    .brand-tabs {
        padding: 0.75rem 1.5rem;
    }

    .file-management-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
        padding: 1rem 1.5rem;
    }

    .file-actions {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .main-content {
        flex-direction: column;
    }

    .faq-sidebar {
        width: 100%;
        min-height: 300px;
        border-right: none;
        border-bottom: 2px solid var(--border);
    }

    .faq-editor {
        width: 100%;
    }
}

/* Mobile (≤ 768px) */
@media (max-width: 768px) {
    .faq-page-wrapper {
        padding-left: 0 !important;
    }

    .header {
        padding: 1rem;
    }

    .header-content {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .header-left {
        width: 100%;
    }

    .header h1 {
        font-size: 1.25rem;
    }

    .header-actions {
        width: 100%;
        justify-content: space-between;
    }

    .brand-tabs {
        padding: 0.5rem 1rem;
        overflow-x: auto;
        white-space: nowrap;
    }

    .tab-btn {
        padding: 10px 16px;
        font-size: 14px;
    }

    .file-management-bar {
        padding: 1rem;
    }

    .file-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .file-actions {
        gap: 8px;
    }

    .file-actions button,
    .file-actions label {
        padding: 8px 12px;
        font-size: 13px;
    }

    .main-content {
        min-height: calc(100vh - 350px);
    }

    .faq-sidebar {
        min-height: 250px;
    }

    .sidebar-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .faq-list {
        max-height: 200px;
    }

    .editor-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .editor-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .editor-form textarea {
        font-size: 14px;
    }

    .form-preview {
        padding: 1rem;
    }

    /* ปรับ sidebar toggle button ให้เห็นชัดบนมือถือ */
    .floating-sidebar-toggle {
        display: block !important;
        bottom: 20px;
        left: 15px;
        width: 50px;
        height: 50px;
        font-size: 24px;
    }
}

/* Small Mobile (≤ 480px) */
@media (max-width: 480px) {
    .header {
        padding: 0.75rem;
    }

    .header h1 {
        font-size: 1.1rem;
    }

    .header-brand-logo {
        max-width: 120px;
        height: 30px;
    }

    .brand-tabs {
        padding: 0.5rem 0.75rem;
    }

    .tab-btn {
        padding: 8px 12px;
        font-size: 13px;
    }

    .file-management-bar {
        padding: 0.75rem;
    }

    .file-status,
    .file-count {
        font-size: 13px;
    }

    .file-actions button,
    .file-actions label {
        padding: 6px 10px;
        font-size: 12px;
        flex: 1 1 calc(50% - 4px);
        min-width: 0;
    }

    .file-actions button svg,
    .file-actions label svg {
        width: 12px;
        height: 12px;
    }

    .sidebar-header h2 {
        font-size: 1.1rem;
    }

    .btn-primary,
    .btn-secondary,
    .btn-danger {
        padding: 8px 12px;
        font-size: 13px;
    }

    .search-box input {
        font-size: 13px;
        padding: 8px 12px 8px 35px;
    }

    .faq-list {
        max-height: 180px;
    }

    .faq-topic-group {
        padding: 10px;
    }

    .faq-item {
        padding: 8px 10px;
        font-size: 13px;
    }

    .editor-form {
        padding: 1.5rem;
    }

    .form-group label {
        font-size: 14px;
    }

    .form-group textarea,
    .form-group input {
        font-size: 13px;
        padding: 10px 12px;
    }

    .form-group small {
        font-size: 11px;
    }

    .preview-content {
        font-size: 13px;
        padding: 1rem;
    }

    .empty-state svg {
        width: 48px;
        height: 48px;
    }

    .empty-state h3 {
        font-size: 1.1rem;
    }

    .empty-state p {
        font-size: 13px;
    }
}