/* Core Design System & Theme — Light (White / Black) */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    --bg-main: #ffffff;
    --bg-card: #ffffff;
    --bg-sidebar: #fafafa;
    --bg-input: #ffffff;
    --bg-hover: #f5f5f5;
    --bg-muted: #f3f4f6;
    --border-color: #e5e7eb;
    --border-strong: #d1d5db;

    --text-primary: #111111;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;

    --primary: #111111;
    --primary-hover: #374151;
    --primary-glow: rgba(17, 17, 17, 0.08);

    --success: #059669;
    --success-hover: #047857;
    --warning: #d97706;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --info: #0284c7;

    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);

    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* App Layout */
.app-container {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

/* Sidebar */
aside.sidebar {
    width: 280px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: fixed;
    height: 100vh;
    z-index: 10;
    transition: var(--transition);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.brand i {
    color: var(--text-primary);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    list-style: none;
    flex-grow: 1;
}

.nav-item a {
    display: block;
    width: 100%;
    text-decoration: none;
}

.nav-item button {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
}

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

.nav-item.active button {
    background-color: var(--primary);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

/* Main Panel */
main.main-content {
    margin-left: 280px;
    flex-grow: 1;
    padding: 2.5rem;
    max-width: calc(100vw - 280px);
    transition: var(--transition);
    background-color: var(--bg-main);
}

/* Page Headers */
.header-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.title-area h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.title-area p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.action-area {
    display: flex;
    gap: 1rem;
}

/* Cards */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

/* Stats Widgets */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
}

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

.stat-info h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.stat-info .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--bg-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-size: 1.25rem;
    border: 1px solid var(--border-color);
}

/* Form Elements */
.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.65rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-textarea {
    resize: vertical;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-icon-wrap {
    position: relative;
}

.input-icon-wrap i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.input-icon-wrap .form-input {
    padding-left: 2.25rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-muted);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-strong);
}

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

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

/* Data Tables */
.table-container {
    overflow-x: auto;
    width: 100%;
}

table.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
    background-color: #ffffff;
}

table.data-table th {
    padding: 1rem;
    font-weight: 700;
    color: #111111;
    border-bottom: 2px solid #e2e8f0;
    background: #f8fafc;
    white-space: nowrap;
}

table.data-table td {
    padding: 1rem;
    border-bottom: 1px solid #e2e8f0;
    color: #1a1a1a;
    background-color: #ffffff;
    white-space: nowrap;
}

table.data-table tr:hover td {
    background: #f1f5f9;
}

/* Pagination & Controls */
.controls-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex-grow: 1;
    max-width: 400px;
    width: 100%;
}

.search-box input {
    width: 100%;
    padding: 0.65rem 1rem 0.65rem 2.5rem;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.search-box i {
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.filter-select {
    padding: 0.65rem 1rem;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    outline: none;
}

.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.pagination-buttons {
    display: flex;
    gap: 0.5rem;
}

/* Modal and Upload Wizard */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.modal.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 650px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: transform 0.25s ease;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

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

.modal-content.modal-sm {
    max-width: 400px;
    text-align: center;
}

.modal-content.modal-md {
    max-width: 600px;
}

.modal-header.bordered {
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.detail-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
    font-size: 0.9rem;
}

.detail-row {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding: 0.65rem 0;
    align-items: center;
}

.detail-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.detail-value {
    color: var(--text-primary);
    word-break: break-all;
    font-weight: 600;
}

.alert-title {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.alert-message {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.75rem;
    line-height: 1.6;
}

.alert-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
}

/* Drag-Drop Zone */
.dropzone {
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius-lg);
    padding: 3rem 1.5rem;
    text-align: center;
    cursor: pointer;
    background: var(--bg-muted);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.dropzone:hover, .dropzone.dragover {
    border-color: var(--text-primary);
    background: var(--bg-hover);
}

.dropzone i {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.dropzone p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.dropzone span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Duplicate resolution alerts */
.duplicate-panel {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.duplicate-panel h4 {
    color: var(--warning);
    margin-bottom: 0.5rem;
}

.duplicate-options {
    display: flex;
    gap: 1rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

.duplicate-options label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-primary);
}

/* Loader styling */
.loader {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

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

/* Batch Table Specific Styling */
.batch-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    background: var(--bg-muted);
    font-size: 0.8rem;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.batch-badge.accent {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-strong);
}

/* Column mapping table */
.mapping-table {
    width: 100%;
    margin-top: 1rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    border-collapse: collapse;
}

.mapping-table th, .mapping-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.mapping-table select {
    width: 100%;
    padding: 0.4rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
}

.mapping-table select {
    width: 100%;
    padding: 0.4rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
}

.mapping-scroll {
    max-height: 280px;
    margin-bottom: 0.5rem;
}

.mapping-section-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.mapping-link-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
}

.mapping-sample {
    color: var(--text-secondary);
    font-size: 0.85rem;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mapping-action-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.mapping-action-select:disabled,
.mapping-file-select option:disabled {
    opacity: 0.6;
}

/* Column picker & field filters */
.column-picker-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.5rem;
    max-height: 320px;
    overflow-y: auto;
}

.column-picker-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.column-picker-item:hover {
    background: var(--bg-hover);
}

.column-picker-item input {
    accent-color: var(--primary);
}

.field-filter-panel {
    background: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
}

.field-filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.field-filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.85rem;
    margin-bottom: 1rem;
}

.field-filter-item .form-input {
    padding: 0.5rem 0.65rem;
    font-size: 0.85rem;
}

.field-filter-actions {
    display: flex;
    justify-content: flex-end;
}

.export-field-actions {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.export-format-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Login page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-main);
    margin: 0;
    padding: 20px;
}

.login-wrapper {
    width: 100%;
    max-width: 420px;
}

.login-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.login-brand i {
    color: var(--text-primary);
    font-size: 1.75rem;
}

.login-brand img {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
}

.login-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--danger);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Settings preview */
.logo-preview {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

/* RESPONSIVE DESIGN — consolidated in Mobile Top Bar section below */

/* Chatbot Styles */
.chat-workspace {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px);
    min-height: 500px;
    padding: 0;
    overflow: hidden;
}

.chat-messages {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    background: var(--bg-muted);
}

.chat-bubble {
    display: flex;
    max-width: 80%;
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    font-size: 0.95rem;
    line-height: 1.5;
    animation: fadeInUp 0.25s ease;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.bot-message {
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: 2px;
    box-shadow: var(--shadow-sm);
}

.user-message {
    background: var(--primary);
    color: #ffffff;
    align-self: flex-end;
    border-bottom-right-radius: 2px;
    box-shadow: var(--shadow-sm);
}

.bubble-content {
    width: 100%;
}

.chat-input-area {
    display: flex;
    padding: 1rem 1.5rem;
    background: #ffffff;
    border-top: 1px solid var(--border-color);
    gap: 0.75rem;
    align-items: center;
}

.chat-input-area input {
    flex-grow: 1;
    padding: 0.8rem 1.2rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    outline: none;
    font-family: var(--font-sans);
    transition: var(--transition);
}

.chat-input-area input:focus {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.suggested-queries {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.suggest-btn {
    background: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 0.4rem 0.85rem;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.suggest-btn:hover {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

/* Code block output formatting inside bot responses */
.bot-message pre {
    background: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    margin: 0.75rem 0;
    overflow-x: auto;
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--info);
}

.bot-message table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.85rem;
    margin-top: 0.75rem;
    border: 1px solid var(--border-color);
}

.bot-message th, .bot-message td {
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    text-align: left;
}

.bot-message th {
    background: var(--bg-muted);
    color: var(--text-secondary);
}

/* Chart offer in AI chat */
.chart-offer-panel {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.chart-offer-question {
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.85rem;
    line-height: 1.5;
}

.chart-offer-actions {
    display: flex;
    gap: 0.65rem;
    flex-wrap: wrap;
}

.chart-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.5rem;
}

.chart-type-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 0.75rem;
    background: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.chart-type-btn:hover,
.chart-type-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.chart-type-btn.recommended {
    border-color: var(--text-primary);
}

.chart-canvas-wrap {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    max-height: 320px;
}

.chart-export-offer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.chart-export-format-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.chart-export-pdf,
.chart-export-png {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1rem;
    background: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.chart-export-pdf:hover,
.chart-export-png:hover {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

/* ─── Mobile Top Bar ────────────────────────────────────── */
.mobile-topbar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    z-index: 200;
    align-items: center;
    padding: 0 1rem;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.mobile-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}

.mobile-brand i {
    font-size: 1.1rem;
}

/* ─── Burger Button ─────────────────────────────────────── */
.burger-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
}

.burger-btn:hover {
    background: var(--bg-hover);
}

.burger-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ─── Sidebar Close Button (mobile only) ────────────────── */
.sidebar-close-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    margin-left: auto;
    padding: 4px 6px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

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

/* ─── Sidebar Overlay ───────────────────────────────────── */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 149;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* PWA Mobile Card Table (hidden on desktop) */
.data-view-wrapper {
    width: 100%;
}

.mobile-cards-list {
    display: none;
}

.mobile-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.mobile-card-header {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-muted);
}

.mobile-card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.35;
    word-break: break-word;
}

.mobile-card-subtitle {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    line-height: 1.4;
    word-break: break-word;
}

.mobile-card-body {
    padding: 0.75rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.mobile-card-row {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 0.65rem;
    align-items: start;
    padding-bottom: 0.55rem;
    border-bottom: 1px solid var(--border-color);
}

.mobile-card-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.mobile-card-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    line-height: 1.4;
}

.mobile-card-value {
    font-size: 0.88rem;
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-word;
    line-height: 1.4;
}

.mobile-card-muted {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.mobile-card-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    word-break: break-all;
}

.mobile-card-link--stock {
    color: var(--success);
}

.mobile-card-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-muted);
}

.mobile-card-actions .btn {
    padding: 0.45rem 0.75rem;
    font-size: 0.8rem;
}

.mobile-cards-empty,
.mobile-cards-loading {
    text-align: center;
    color: var(--text-muted);
    padding: 2.5rem 1rem;
    font-size: 0.9rem;
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-muted);
}

.mobile-cards-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
}

/* ─── Responsive Breakpoints ────────────────────────────── */

/* Tablet & Mobile: < 1024px */
@media (max-width: 1023px) {
    aside.sidebar {
        width: 280px;
        max-width: 85vw;
        padding: 1.5rem 1.25rem;
        align-items: stretch;
        transform: translateX(-100%);
        z-index: 150;
        box-shadow: var(--shadow-lg);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    aside.sidebar.open {
        transform: translateX(0);
    }

    .brand {
        width: 100%;
    }

    .brand span {
        display: inline;
    }

    .nav-item button {
        justify-content: flex-start;
        padding: 0.85rem 1rem;
    }

    .nav-item button i {
        font-size: 1rem;
        width: 20px;
        text-align: center;
        flex-shrink: 0;
    }

    .sidebar-overlay {
        display: block;
    }

    .mobile-topbar {
        display: flex;
    }

    .sidebar-close-btn {
        display: block;
    }

    main.main-content {
        margin-left: 0;
        max-width: 100vw;
        padding: 1.5rem 1rem;
        padding-top: calc(60px + 1.5rem);
    }

    .dashboard-grid {
        grid-template-columns: 1fr !important;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .header-section {
        flex-direction: column;
        align-items: flex-start;
    }

    .action-area {
        flex-wrap: wrap;
        width: 100%;
    }

    .action-area .btn {
        flex: 1;
        justify-content: center;
        min-width: 120px;
    }

    .controls-row {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        max-width: 100%;
    }

    .field-filter-grid {
        grid-template-columns: 1fr;
    }

    .column-picker-list {
        grid-template-columns: 1fr;
    }

    /* PWA mobile card table */
    .desktop-table-view {
        display: none;
    }

    .mobile-cards-list {
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
        margin-bottom: 1rem;
    }

    /* Modal: keep centered on tablet/mobile */
    .modal {
        padding: 1rem;
        box-sizing: border-box;
    }

    .modal-content {
        width: 100%;
        max-width: 560px;
        margin: 0;
    }
}

/* Mobile: < 640px */
@media (max-width: 639px) {
    main.main-content {
        padding: 1rem;
        padding-top: calc(60px + 1rem);
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .stat-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .stat-info .stat-value {
        font-size: 1.4rem;
    }

    .mobile-card-row {
        grid-template-columns: 1fr;
        gap: 0.2rem;
    }

    .mobile-card-label {
        font-size: 0.7rem;
    }

    /* Glass card padding reduction */
    .glass-card {
        padding: 1rem;
    }

    .title-area h1 {
        font-size: 1.35rem;
    }

    /* Modal responsive */
    .modal {
        padding: 1rem;
        box-sizing: border-box;
        align-items: center;
        justify-content: center;
    }

    .modal-content {
        width: 100%;
        max-width: 100% !important;
        margin: 0 !important;
        padding: 1.25rem !important;
    }

    .detail-row {
        grid-template-columns: 1fr;
        gap: 0.25rem;
        align-items: start;
    }

    /* Action area buttons */
    .action-area {
        gap: 0.5rem;
    }

    .action-area .btn {
        font-size: 0.8rem;
        padding: 0.55rem 0.75rem;
    }

    /* Controls row */
    .controls-row {
        gap: 0.75rem;
    }

    /* Pagination */
    .pagination-area {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    /* Import Modal steps */
    .step-indicator {
        gap: 0.5rem;
        font-size: 0.78rem;
    }

    /* Dashboard summary cards min-width */
    .stats-grid > * {
        min-width: 0;
    }

    /* Column mapping table scroll */
    .mapping-scroll {
        max-height: 200px;
    }

    /* Duplicate options stacked on mobile */
    .duplicate-options {
        flex-direction: column;
        gap: 0.5rem;
    }

    /* Chat section */
    .chat-section-container {
        height: 60vh;
    }
}

/* Very small phones: < 380px */
@media (max-width: 380px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .mobile-brand span {
        display: none;
    }

    .title-area h1 {
        font-size: 1.15rem;
    }
}