/* ============================================================
   KNOWLEDGE BASE PAGES — Dark theme
   Shared across: KBList, KBCreate, KBDetails, KBConfig, KBDocuments
   ============================================================ */

/* ── KB List Page ── */

.kb-page {
    max-width: 1100px;
    margin: 0 auto;
}

/* ── Page header ── */
.kb-page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.kb-page-title {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    line-height: 1.2;
}

.kb-page-subtitle {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-top: 0.3rem;
}

/* ── Create button ── */
.kb-create-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-md, 10px);
    font-size: 0.88rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--accent-1, #6366f1), var(--accent-2, #a855f7));
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
    border: none;
    cursor: pointer;
}

.kb-create-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--glow-sm, 0 0 12px rgba(99, 102, 241, 0.45));
}

.kb-create-btn:focus-visible {
    outline: 2px solid var(--accent-1, #6366f1);
    outline-offset: 2px;
}

/* ── Search bar ── */
.kb-search-wrap {
    position: relative;
    margin-bottom: 1.75rem;
}

.kb-search-icon {
    position: absolute;
    left: 0.9rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.kb-search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.7rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md, 10px);
    font-size: 0.9rem;
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

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

.kb-search-input:focus {
    border-color: var(--accent-1, #6366f1);
    background: rgba(99, 102, 241, 0.05);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* Remove native search clear button styling */
.kb-search-input::-webkit-search-cancel-button {
    -webkit-appearance: none;
}

/* ── Error banner ── */
.kb-error-banner {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md, 10px);
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.3);
    color: #f87171;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

/* ── Card grid ── */
.kb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

/* ── KB Card (restructured: outer div, inner link) ── */
.kb-card {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg, 16px);
    padding: 1.35rem;
    transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}

.kb-card:hover {
    border-color: rgba(99, 102, 241, 0.35);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.08);
    transform: translateY(-2px);
}

.kb-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.kb-card-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md, 10px);
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-1, #6366f1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.kb-card-delete {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s, background 0.2s;
}

.kb-card:hover .kb-card-delete {
    opacity: 1;
}

.kb-card-delete:hover {
    color: #f87171;
    background: rgba(248, 113, 113, 0.1);
}

.kb-card-delete:focus-visible {
    opacity: 1;
    outline: 2px solid var(--accent-1);
    outline-offset: 2px;
}

/* The clickable link area within the card */
.kb-card-link {
    display: flex;
    flex-direction: column;
    flex: 1;
    text-decoration: none;
    color: inherit;
}

.kb-card-link:focus-visible {
    outline: 2px solid var(--accent-1, #6366f1);
    outline-offset: 2px;
    border-radius: var(--radius-md, 10px);
}

.kb-card-body {
    flex: 1;
    margin-bottom: 1rem;
}

.kb-card-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
    letter-spacing: -0.2px;
}

.kb-card-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kb-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.85rem;
    border-top: 1px solid var(--border-color);
}

.kb-card-date {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.kb-card-arrow {
    color: var(--text-muted);
    transition: color 0.2s, transform 0.2s;
}

.kb-card:hover .kb-card-arrow {
    color: var(--accent-1);
    transform: translateX(2px);
}

/* ── Empty state ── */
.kb-empty {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--surface-color);
    border-radius: var(--radius-lg, 16px);
    border: 1px dashed var(--border-color);
}

.kb-empty-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.08);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.kb-empty-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.kb-empty-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.kb-empty-btn {
    margin: 0 auto;
}

/* ── Loading state ── */
.kb-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 4rem 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.kb-loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(255, 255, 255, 0.08);
    border-top-color: var(--accent-1, #6366f1);
    border-radius: 50%;
    animation: kbSpin 0.7s linear infinite;
}

@keyframes kbSpin {
    to { transform: rotate(360deg); }
}


/* ============================================================
   SHARED — Used by KBCreate, KBDetails, KBConfig, KBDocuments
   ============================================================ */

/* ── Page container (shared wrapper for detail/create pages) ── */
.page-container {
    max-width: 1100px;
    margin: 0 auto;
}

/* ── Page header ── */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

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

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-md, 10px);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s, border-color 0.2s;
    text-decoration: none;
    border: none;
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--accent-1, #6366f1);
    outline-offset: 2px;
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--accent-1, #6366f1), var(--accent-2, #a855f7));
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--glow-sm, 0 0 12px rgba(99, 102, 241, 0.45));
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-outline {
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.04);
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem;
    border-radius: 8px;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.2s, background 0.2s;
    text-decoration: none;
    font-size: 0.88rem;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

.btn-icon:focus-visible {
    outline: 2px solid var(--accent-1, #6366f1);
    outline-offset: 2px;
}

.btn-danger:hover {
    background: rgba(248, 113, 113, 0.1);
    color: #f87171;
}

/* ── Tabs (KBDetails) ── */
.tabs {
    display: flex;
    gap: 0.25rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.75rem;
}

.tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1rem;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}

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

.tab.active,
.tab[aria-selected="true"] {
    color: var(--accent-1, #6366f1);
    border-bottom-color: var(--accent-1, #6366f1);
}

.tab:focus-visible {
    outline: 2px solid var(--accent-1, #6366f1);
    outline-offset: -2px;
    border-radius: 4px 4px 0 0;
}

.tab-content {
    background: var(--surface-color);
    border-radius: var(--radius-lg, 16px);
    border: 1px solid var(--border-color);
    padding: 1.75rem;
}

/* ── Form container (KBCreate) ── */
.kb-form-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--surface-color);
    padding: 2rem;
    border-radius: var(--radius-lg, 16px);
    border: 1px solid var(--border-color);
}

.kb-form-container h1 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.3px;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.kb-form-container p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    margin-bottom: 1.75rem;
}

/* ── Form styles ── */
.kb-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.form-group label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.2px;
}

.form-group input,
.form-group select,
.form-group textarea,
.kb-form textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md, 10px);
    font-size: 0.9rem;
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    color-scheme: dark;
}

.form-group input::placeholder,
.form-group textarea::placeholder,
.kb-form textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.kb-form textarea:focus {
    border-color: var(--accent-1, #6366f1);
    background: rgba(99, 102, 241, 0.05);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23888888' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.9rem center;
    padding-right: 2.5rem;
    cursor: pointer;
}

.form-group select option {
    background: var(--surface-2-color, #181818);
    color: var(--text-primary);
}


.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

/* ── Config container ── */
.config-container h2,
.documents-container h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.config-container > p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

/* ── Config sections (KBConfig overhaul) ── */
.config-section {
    margin-bottom: 1.75rem;
    padding-bottom: 1.75rem;
    border-bottom: 1px solid var(--border-color);
}

.config-section:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.config-section-title {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.config-section-title svg {
    color: var(--text-muted);
    cursor: help;
    flex-shrink: 0;
}

.strategy-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-top: 0.35rem;
    margin-bottom: 1rem;
}

.config-params {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.config-param-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.label-with-help {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.label-with-help svg {
    color: var(--text-muted);
    cursor: help;
    flex-shrink: 0;
}

.config-fieldset {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md, 10px);
    padding: 1.25rem;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.config-fieldset legend {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0 0.5rem;
}

.form-group select optgroup {
    background: var(--surface-2-color, #181818);
    color: var(--text-secondary);
    font-weight: 600;
    font-style: normal;
}

/* ── Documents ── */
.documents-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

/* Upload button — uses <label> wrapping a sr-only file input */
.doc-upload-label {
    cursor: pointer;
    position: relative;
}

.doc-upload-label input[type="file"].sr-only {
    position: absolute;
}

/* Scrollable table wrapper */
.doc-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-md, 10px);
}

.doc-table-wrap:focus-visible {
    outline: 2px solid var(--accent-1, #6366f1);
    outline-offset: 2px;
}

.documents-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

.documents-table th,
.documents-table td {
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.documents-table th {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.documents-table td {
    color: var(--text-primary);
    font-size: 0.88rem;
}

.documents-table tbody tr {
    transition: background 0.15s;
}

.documents-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.action-buttons {
    display: flex;
    gap: 0.35rem;
}

/* ── Document search ── */
.doc-search-wrap {
    position: relative;
    margin-bottom: 1.25rem;
}

.doc-search-icon {
    position: absolute;
    left: 0.9rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.doc-search-input {
    width: 100%;
    padding: 0.65rem 1rem 0.65rem 2.5rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md, 10px);
    font-size: 0.85rem;
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

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

.doc-search-input:focus {
    border-color: var(--accent-1, #6366f1);
    background: rgba(99, 102, 241, 0.05);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.doc-search-input::-webkit-search-cancel-button {
    -webkit-appearance: none;
}

/* ── Document name (link + inline edit) ── */
.doc-name-cell {
    min-width: 180px;
}

.doc-name-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.doc-name-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.15s;
}

.doc-name-link:hover {
    color: var(--accent-1, #6366f1);
}

.doc-rename-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s, color 0.15s, background 0.15s;
    flex-shrink: 0;
}

.documents-table tbody tr:hover .doc-rename-btn {
    opacity: 1;
}

.doc-rename-btn:hover {
    color: var(--accent-1, #6366f1);
    background: rgba(99, 102, 241, 0.1);
}

.doc-rename-btn:focus-visible {
    opacity: 1;
    outline: 2px solid var(--accent-1, #6366f1);
    outline-offset: 1px;
}

.doc-name-input {
    width: 100%;
    padding: 0.3rem 0.5rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--accent-1, #6366f1);
    border-radius: 4px;
    font-size: 0.88rem;
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* ── Inactive document row ── */
.doc-row-inactive {
    opacity: 0.5;
}

/* ── Toggle switch ── */
.toggle-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
}

.toggle-switch input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-track {
    width: 36px;
    height: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    position: relative;
    transition: background 0.2s;
}

.toggle-track::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--text-muted);
    transition: transform 0.2s, background 0.2s;
}

.toggle-switch input:checked + .toggle-track {
    background: rgba(16, 185, 129, 0.3);
}

.toggle-switch input:checked + .toggle-track::after {
    transform: translateX(16px);
    background: #34d399;
}

.toggle-switch input:focus-visible + .toggle-track {
    outline: 2px solid var(--accent-1, #6366f1);
    outline-offset: 2px;
}

/* ── Drag & drop ── */
.documents-container {
    position: relative;
}

.doc-drop-active {
    border-color: var(--accent-1, #6366f1);
}

.doc-drop-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background: rgba(99, 102, 241, 0.08);
    border: 2px dashed var(--accent-1, #6366f1);
    border-radius: var(--radius-lg, 16px);
    color: var(--accent-1, #6366f1);
    font-size: 0.95rem;
    font-weight: 600;
    z-index: 10;
    pointer-events: none;
}

/* ── Status badges ── */
.status-badge {
    display: inline-flex;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-full, 9999px);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.status-badge.completed {
    background: rgba(16, 185, 129, 0.12);
    color: #34d399;
}

.status-badge.processing {
    background: rgba(99, 102, 241, 0.12);
    color: #818cf8;
}

.status-badge.failed {
    background: rgba(248, 113, 113, 0.12);
    color: #f87171;
}

.status-badge.pending {
    background: rgba(251, 191, 36, 0.12);
    color: #fbbf24;
}

/* ── Messages ── */
.error-message {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.25);
    color: #f87171;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md, 10px);
    margin-bottom: 1.25rem;
    font-size: 0.85rem;
}

.success-message {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.25);
    color: #34d399;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md, 10px);
    margin-bottom: 1.25rem;
    font-size: 0.85rem;
}

/* ── Empty state (shared) ── */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3.5rem 2rem;
    background: var(--surface-color);
    border-radius: var(--radius-lg, 16px);
    border: 1px dashed var(--border-color);
    color: var(--text-secondary);
}

.empty-state svg {
    margin: 0 auto 1rem;
    color: var(--text-muted);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.empty-state p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ── Loading ── */
.loading {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}


/* ── Test Chunking ── */
.test-chunking-section {
    margin-top: 1.75rem;
    padding-top: 1.75rem;
    border-top: 1px solid var(--border-color);
}

.test-chunking-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.4rem 0;
    background: none;
    border: none;
    cursor: pointer;
    user-select: none;
    color: inherit;
    font-family: inherit;
}

.test-chunking-header:focus-visible {
    outline: 2px solid var(--accent-1, #6366f1);
    outline-offset: 2px;
    border-radius: 4px;
}

.test-chunking-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
    text-align: left;
    margin: 0;
}

.test-chunking-header .test-icon {
    color: var(--accent-1, #6366f1);
    flex-shrink: 0;
}

.test-chunking-chevron {
    color: var(--text-muted);
    transition: transform 0.2s;
    flex-shrink: 0;
}

.test-chunking-chevron.expanded {
    transform: rotate(180deg);
}

.test-chunking-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-top: 1.25rem;
}

.test-strategy-label {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.test-strategy-label strong {
    color: var(--accent-1, #6366f1);
}

.test-textarea {
    min-height: 120px;
    resize: vertical;
}

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

.test-results {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.test-stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.test-stat-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md, 10px);
    padding: 0.85rem 1rem;
    text-align: center;
}

.test-stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-1, #6366f1);
    line-height: 1.2;
}

.test-stat-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-top: 0.25rem;
}

.test-chunks-list {
    max-height: 400px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.test-chunks-list::-webkit-scrollbar {
    width: 6px;
}

.test-chunks-list::-webkit-scrollbar-track {
    background: transparent;
}

.test-chunks-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.test-chunk-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md, 10px);
    padding: 0.75rem 1rem;
}

.test-chunk-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 20px;
    padding: 0 0.4rem;
    border-radius: var(--radius-full, 9999px);
    background: rgba(99, 102, 241, 0.12);
    color: var(--accent-1, #6366f1);
    font-size: 0.7rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.test-chunk-text {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: 'SF Mono', 'Fira Code', 'Fira Mono', monospace;
    margin: 0;
}

.test-chunk-meta {
    display: flex;
    justify-content: flex-end;
    margin-top: 0.4rem;
    font-size: 0.7rem;
    color: var(--text-muted);
}


/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
    .kb-page-header {
        flex-direction: column;
        gap: 1rem;
    }

    .kb-create-btn {
        align-self: flex-start;
    }

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

    /* Always show delete button on touch devices */
    .kb-card-delete {
        opacity: 1;
    }

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

    .tab-content {
        padding: 1.25rem;
    }

    .kb-form-container {
        padding: 1.5rem;
    }

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

    .doc-rename-btn {
        opacity: 1;
    }

    /* Touch-friendly targets for tablets */
    .form-group input,
    .form-group select,
    .form-group textarea,
    .kb-form textarea {
        min-height: 44px;
    }

    .btn {
        min-height: 44px;
    }

    .btn-icon {
        min-width: 44px;
        min-height: 44px;
    }

    .custom-select-trigger {
        min-height: 44px;
    }

    .toggle-switch .toggle-track {
        width: 40px;
        height: 24px;
    }

    .toggle-switch .toggle-track::after {
        width: 18px;
        height: 18px;
        top: 3px;
        left: 3px;
    }

    .toggle-switch input:checked + .toggle-track::after {
        transform: translateX(16px);
    }
}

@media (max-width: 480px) {
    .kb-page-title {
        font-size: 1.45rem;
    }

    .kb-card {
        padding: 1.1rem;
    }

    .config-param-row {
        grid-template-columns: 1fr;
    }

    .config-fieldset {
        padding: 1rem;
    }

    .test-stats-row {
        grid-template-columns: 1fr;
    }

    .test-chunks-list {
        max-height: 300px;
    }

    /* Extra-small screen tweaks */
    .kb-card-delete {
        width: 40px;
        height: 40px;
    }

    .kb-search-input {
        padding-top: 0.85rem;
        padding-bottom: 0.85rem;
    }

    .kb-create-btn {
        padding: 0.7rem 1.25rem;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }

    /* Tab bar — scrollable, hide scrollbar */
    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .tabs::-webkit-scrollbar {
        display: none;
    }

    .tab {
        padding: 0.75rem 0.85rem;
        font-size: 0.82rem;
        white-space: nowrap;
        min-height: 44px;
    }
}

/* Extra-small screens */
@media (max-width: 360px) {
    .kb-page-title {
        font-size: 1.3rem;
    }

    .kb-page-subtitle {
        font-size: 0.82rem;
    }

    .kb-card {
        padding: 1rem;
    }

    .kb-card-icon {
        width: 36px;
        height: 36px;
    }

    .kb-card-name {
        font-size: 0.95rem;
    }

    .kb-empty {
        padding: 3rem 1.5rem;
    }

    .kb-form-container {
        padding: 1.25rem;
    }

    .tab-content {
        padding: 1rem;
    }

    .page-header h1 {
        font-size: 1.35rem;
    }
}