:root {
    --bg-dark: #1e1e1e;
    --bg-sidebar: #252526;
    --bg-card: #2d2d2d;
    --bg-input: #3c3c3c;
    --text-primary: #d4d4d4;
    --text-secondary: #9d9d9d;
    --accent: #d18c4e;
    --accent-hover: #e0a06a;
    --accent-glow: rgba(209, 140, 78, 0.25);
    --success: #4ec9b0;
    --warning: #dcdcaa;
    --danger: #f44747;
    --border: #404040;
    --radius: 8px;
    --transition: 0.2s ease;
}

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

html, body {
    height: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    overflow: hidden;
}

/* ─── Sidebar ────────────────────────────────────────────────────────────── */

#sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 240px;
    height: 100vh;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px 16px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
}

.sidebar-header small {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.nav-links {
    list-style: none;
    flex: 1;
    overflow-y: auto;
    padding: 12px 0;
}

.nav-links li {
    padding: 11px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    color: var(--text-secondary);
    transition: all var(--transition);
    border-left: 3px solid transparent;
}

.nav-links li:hover:not(.disabled) {
    background: rgba(209, 140, 78, 0.10);
    color: var(--text-primary);
}

.nav-links li.active {
    background: rgba(209, 140, 78, 0.15);
    color: var(--accent);
    border-left-color: var(--accent);
}

.nav-links li.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.nav-links li i {
    width: 18px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

#data-badge {
    font-size: 0.78rem;
    color: var(--success);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ─── Main ───────────────────────────────────────────────────────────────── */

#main-content {
    margin-left: 240px;
    height: 100vh;
    overflow-y: auto;
    padding: 32px 40px;
    position: relative;
}

.panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 0.95rem;
}

/* ─── Cards ──────────────────────────────────────────────────────────────── */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

.card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.card h3 i {
    margin-right: 8px;
    color: var(--accent);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

/* ─── Upload ─────────────────────────────────────────────────────────────── */

.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 60px 40px;
    text-align: center;
    transition: all var(--transition);
    cursor: pointer;
    background: var(--bg-card);
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(108, 99, 255, 0.05);
}

.upload-zone i {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 16px;
    display: block;
}

.upload-zone p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.file-label {
    color: var(--accent);
    cursor: pointer;
    text-decoration: underline;
}

.upload-options {
    margin-top: 20px;
}

.upload-options label {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.upload-options select {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 8px;
    font-size: 0.85rem;
}

.progress-bar {
    height: 4px;
    background: var(--bg-input);
    border-radius: 2px;
    overflow: hidden;
    margin: 16px 0 8px;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    transition: width 0.3s;
}

/* ─── Data & Session Management panel ───────────────────────────────────── */

.dsm-tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 24px;
}
.dsm-tab {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    padding: 10px 22px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}
.dsm-tab:hover { color: var(--text-primary); }
.dsm-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Upload / import card */
.dsm-upload-card { margin-bottom: 24px; }
.dsm-upload-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
}
.dsm-upload-header h3 { margin: 0; }
.dsm-chevron { color: var(--text-secondary); transition: transform 0.2s; }
.dsm-chevron.open { transform: rotate(180deg); }
#dsm-upload-body { margin-top: 18px; }

.dsm-upload-meta {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 12px;
    margin-bottom: 16px;
}
.dsm-field { display: flex; flex-direction: column; gap: 5px; }
.dsm-field label { font-size: 0.78rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .05em; }
.dsm-field input, .dsm-field select {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    padding: 7px 10px;
    font-size: 0.88rem;
    outline: none;
    transition: border-color var(--transition);
}
.dsm-field input:focus, .dsm-field select:focus { border-color: var(--accent); }
.dsm-field--sm { min-width: 130px; }

.dsm-upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    background: var(--bg-dark);
    transition: all var(--transition);
}
.dsm-upload-zone:hover, .dsm-upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(209,140,78,.05);
}
.dsm-upload-zone i { font-size: 2.2rem; color: var(--accent); margin-bottom: 10px; display: block; }
.dsm-upload-zone p { color: var(--text-secondary); font-size: 0.9rem; }

.dsm-url-row { margin-top: 14px; }
.dsm-or {
    display: block;
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: .08em;
}
.dsm-url-input-row {
    display: flex;
    gap: 8px;
}
.dsm-url-input-row input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    padding: 7px 10px;
    font-size: 0.88rem;
    outline: none;
    transition: border-color var(--transition);
}
.dsm-url-input-row input:focus { border-color: var(--accent); }

/* Dataset cards grid */
.dsm-dataset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}
.dsm-dataset-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: border-color var(--transition);
}
.dsm-dataset-card:hover { border-color: var(--accent); }
.dsm-dataset-card__title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.dsm-dataset-card__meta {
    font-size: 0.78rem;
    color: var(--text-secondary);
}
.dsm-dataset-card__desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    font-style: italic;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    min-height: 2.4em;
}
.dsm-dataset-card__actions {
    display: flex;
    gap: 6px;
    margin-top: 10px;
}
.dsm-dataset-card__actions .btn {
    flex: 1;
    font-size: 0.78rem;
    padding: 6px 4px;
    justify-content: center;
    white-space: nowrap;
}
.dsm-dataset-card__actions .btn-icon {
    flex: 0 0 auto;
    padding: 6px 10px;
}

/* Session cards list */
.dsm-session-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 10px;
    transition: border-color var(--transition);
}
.dsm-session-card:hover { border-color: var(--accent); }
.dsm-session-card__info { flex: 1; min-width: 0; }
.dsm-session-card__name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}
.dsm-session-card__name input {
    background: var(--bg-input);
    border: 1px solid var(--accent);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.92rem;
    font-weight: 600;
    padding: 3px 8px;
    outline: none;
    width: 220px;
}
.dsm-session-card__sub {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 3px;
}
.dsm-session-card__badges { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 6px; }
.dsm-badge {
    background: rgba(209,140,78,.15);
    color: var(--accent);
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 7px;
    text-transform: uppercase;
    letter-spacing: .04em;
}
.dsm-session-card__actions { display: flex; gap: 8px; flex-shrink: 0; }

/* Empty states */
.dsm-empty {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-secondary);
}
.dsm-empty i { font-size: 2.5rem; margin-bottom: 12px; display: block; opacity: .4; }
.dsm-empty p { font-size: 0.9rem; }

/* Preview modal */
.dsm-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.65);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn .15s ease;
}
.dsm-modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 28px;
    max-width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
    min-width: 520px;
}
.dsm-modal h3 { margin-bottom: 14px; font-size: 1rem; }
.dsm-modal table { width: 100%; border-collapse: collapse; font-size: .8rem; }
.dsm-modal th { background: var(--bg-dark); color: var(--accent); padding: 6px 10px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
.dsm-modal td { padding: 5px 10px; border-bottom: 1px solid var(--border); color: var(--text-secondary); white-space: nowrap; }
.dsm-modal tr:last-child td { border-bottom: none; }
.dsm-modal-close { float: right; background: none; border: none; color: var(--text-secondary); font-size: 1.1rem; cursor: pointer; }
.dsm-modal-close:hover { color: var(--text-primary); }

/* ─── Toolbar ────────────────────────────────────────────────────────────── */

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 16px;
    align-items: flex-end;
    margin-bottom: 20px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.tool-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tool-group > label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.toolbar select, .toolbar input[type="number"] {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 0.85rem;
    min-width: 80px;
}

.toolbar select:focus, .toolbar input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.toolbar input[type="checkbox"] {
    accent-color: var(--accent);
}

/* ─── Buttons ────────────────────────────────────────────────────────────── */

.btn {
    padding: 8px 18px;
    border-radius: 6px;
    border: none;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition);
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

/* ─── Plot Containers ────────────────────────────────────────────────────── */

.plot-container {
    min-height: 400px;
    width: 100%;
}

/* ─── Tables ─────────────────────────────────────────────────────────────── */

.table-container {
    overflow-x: auto;
    max-height: 400px;
    overflow-y: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.data-table th {
    position: sticky;
    top: 0;
    background: var(--bg-input);
    color: var(--accent);
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

.data-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    white-space: nowrap;
}

.data-table tr:hover td {
    background: rgba(108, 99, 255, 0.04);
}

/* ─── Metric Cards ───────────────────────────────────────────────────────── */

.metric-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
}

.metric-item {
    background: var(--bg-input);
    border-radius: 8px;
    padding: 14px 16px;
    text-align: center;
}

.metric-item .metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.metric-item .metric-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ─── Feature Table ──────────────────────────────────────────────────────── */

.feat-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.feat-table th, .feat-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.feat-table th {
    background: var(--bg-input);
    color: var(--accent);
    font-weight: 600;
}

.feat-table td {
    color: var(--text-secondary);
    font-family: 'Fira Code', monospace;
}

/* ─── Info Text ──────────────────────────────────────────────────────────── */

.info-box {
    margin-top: 16px;
    padding: 12px 16px;
    background: var(--bg-input);
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.info-box strong {
    color: var(--accent);
}

/* ─── Loading ────────────────────────────────────────────────────────────── */

#loading-overlay {
    position: fixed;
    top: 0;
    left: 240px;
    right: 0;
    bottom: 0;
    background: rgba(30, 30, 30, 0.88);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 200;
    backdrop-filter: blur(4px);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 16px;
}

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

#loading-overlay p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.hidden {
    display: none !important;
}

/* ─── Scrollbar ──────────────────────────────────────────────────────────── */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

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

@media (max-width: 768px) {
    #sidebar { width: 60px; }
    .sidebar-header h2, .sidebar-header small, .nav-links li span { display: none; }
    .nav-links li { justify-content: center; padding: 14px 0; }
    #main-content { margin-left: 60px; padding: 20px; }
    .grid-2 { grid-template-columns: 1fr; }
}

/* ─── Select multiple ────────────────────────────────────────────────────── */
select[multiple] {
    min-height: 60px;
}

/* ─── Topo Features Tabs ─────────────────────────────────────────────────── */
.feat-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 12px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 0;
}
.feat-tab {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    cursor: pointer;
    font-size: .85rem;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
}
.feat-tab:hover {
    color: var(--text-primary);
}
.feat-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}
.feat-tab i {
    margin-right: 4px;
}
.feat-tab-content {
    display: none;
}
.feat-tab-content.active {
    display: block;
}

/* ─── Data Preparation Panel ──────────────────────────────────────────────── */
.prep-status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 16px;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}
.prep-status-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.prep-badge {
    font-size: .85rem;
    padding: 4px 10px;
    border-radius: 4px;
    background: var(--bg-input);
}
.prep-badge.work b {
    color: var(--accent);
}
.steps-badge {
    background: var(--accent);
    color: var(--bg-dark);
    font-size: .75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
}
.prep-status-actions {
    display: flex;
    gap: 6px;
}
/* Prep tabs */
.prep-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 12px;
    border-bottom: 2px solid var(--border);
    flex-wrap: wrap;
}
.prep-tab {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 14px;
    cursor: pointer;
    font-size: .83rem;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
    white-space: nowrap;
}
.prep-tab:hover { color: var(--text-primary); }
.prep-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}
.prep-tab i { margin-right: 4px; }
.prep-tab-content { display: none; }
.prep-tab-content.active { display: block; }
/* Alerts */
.prep-alert {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: var(--radius);
    font-size: .85rem;
    margin-bottom: 4px;
}
.prep-alert.warn {
    background: rgba(209,140,78,.1);
    border-left: 3px solid var(--accent);
    color: var(--accent);
}
.prep-alert.info {
    background: rgba(78,201,176,.1);
    border-left: 3px solid var(--success);
    color: var(--success);
}
.prep-alert.danger {
    background: rgba(244,71,71,.1);
    border-left: 3px solid var(--danger);
    color: var(--danger);
}
/* Column grid */
.prep-col-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 5px;
    max-height: 480px;
    overflow-y: auto;
    padding: 2px;
}
.prep-col-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-input);
    border-radius: 4px;
    padding: 6px 10px;
    font-size: .8rem;
    border-left: 3px solid transparent;
    cursor: pointer;
}
.prep-col-item.numeric { border-left-color: var(--accent); }
.prep-col-item.categorical { border-left-color: var(--warning); }
.prep-col-item.active-analysis { background: rgba(209,140,78,.08); }
.prep-col-meta {
    font-size: .7rem;
    color: var(--text-secondary);
    margin-left: auto;
    text-align: right;
    white-space: nowrap;
}
/* Missing rows */
.prep-miss-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 0;
    border-bottom: 1px solid var(--border);
    font-size: .83rem;
    flex-wrap: wrap;
}
/* Types tab */
.prep-type-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 0;
    border-bottom: 1px solid var(--border);
    font-size: .83rem;
}
.prep-type-row:last-child { border-bottom: none; }
.prep-type-name {
    flex: 0 0 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 500;
}
.prep-type-dtype {
    flex: 0 0 90px;
    font-size: .75rem;
    color: var(--text-secondary);
    font-family: monospace;
}
.prep-type-pills {
    display: flex;
    gap: 4px;
}
.prep-type-pill {
    padding: 3px 12px;
    border-radius: 12px;
    font-size: .75rem;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-secondary);
    transition: background .15s, color .15s;
}
.prep-type-pill.active-num  { background: rgba(209,140,78,.2);  color: var(--accent);   border-color: var(--accent);  }
.prep-type-pill.active-cat  { background: rgba(255,193,7,.15);  color: var(--warning);  border-color: var(--warning); }
.prep-type-pill.active-int  { background: rgba(67,233,123,.12); color: var(--success);  border-color: var(--success); }
.prep-type-changed { background: rgba(209,140,78,.06) !important; }
.prep-miss-bar {
    height: 6px;
    border-radius: 3px;
    background: var(--danger);
    min-width: 2px;
}
/* History log */
.prep-history-entry {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: .82rem;
}
.prep-history-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--bg-input);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    flex-shrink: 0;
    font-size: .8rem;
}
.prep-history-desc { flex: 1; }
.prep-history-shapes { font-size: .72rem; color: var(--text-secondary); margin-top: 2px; }
.prep-history-ts { color: var(--text-secondary); font-size: .72rem; white-space: nowrap; }
/* Utility buttons */
.btn-sm {
    padding: 4px 10px;
    font-size: .78rem;
}
.btn-danger {
    background: rgba(244,71,71,.15);
    color: var(--danger);
    border: 1px solid rgba(244,71,71,.35);
}
.btn-danger:hover { background: rgba(244,71,71,.3); }

/* ─── Admin Beta Candidates Table ───────────────────────────────────────── */
.beta-candidates-table {
    width: 100%;
    min-width: 1080px;
    border-collapse: collapse;
    font-size: 0.84rem;
}

.beta-candidates-table th {
    text-align: left;
    color: var(--text-primary);
    font-weight: 600;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.beta-candidates-table td {
    padding: 12px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.beta-candidates-table tbody tr:hover td {
    background: rgba(209, 140, 78, 0.06);
}

.beta-candidates-table .beta-cell-name,
.beta-candidates-table .beta-cell-email,
.beta-candidates-table .beta-cell-company,
.beta-candidates-table .beta-cell-date {
    white-space: nowrap;
}

.beta-candidates-table .beta-cell-usecase {
    max-width: 360px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.beta-candidates-table .beta-cell-status {
    text-align: center;
}

.beta-candidates-table .beta-cell-actions {
    min-width: 190px;
}

.beta-status-pill {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.77rem;
    font-weight: 600;
    text-transform: lowercase;
}

.beta-action-buttons {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: nowrap;
}

.beta-admin-header {
    gap: 12px;
    flex-wrap: wrap;
}

.beta-admin-controls {
    margin-left: auto;
}

@media (max-width: 980px) {
    .beta-admin-controls {
        width: 100%;
        justify-content: flex-start;
    }
}

/* ─── Missing Rows Explorer Modal ─────────────────────────────────────────── */
.miss-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.65);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 16px;
}
.miss-modal-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 1100px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 32px rgba(0,0,0,.5);
}
.miss-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.miss-modal-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-right: 12px;
}
.miss-modal-subtitle {
    font-size: .8rem;
    color: var(--text-secondary);
}
.miss-modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
}
.miss-modal-close:hover { color: var(--text-primary); background: var(--bg-input); }
.miss-modal-body {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    padding: 0;
}
#miss-rows-table-wrap {
    flex: 1;
    overflow: auto;
}
.miss-rows-table {
    width: max-content;
    min-width: 100%;
}
.miss-rows-table th,
.miss-rows-table td {
    white-space: nowrap;
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
}
th.miss-col-highlight,
td.miss-col-highlight {
    background: rgba(244,71,71,.12);
    color: var(--danger);
    font-weight: 600;
}
.miss-null-cell {
    color: var(--danger);
    font-style: italic;
    font-size: .78rem;
}
.miss-modal-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 10px 16px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--accent); border-color: var(--accent); }

/* ── Filter tab ─────────────────────────────────────────────────────────── */
.filt-row {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 12px;
    flex-wrap: wrap;
}
.filt-row select,
.filt-row input[type="number"] {
    background: var(--bg-dark);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: .85rem;
}
.filt-remove-btn { margin-left: auto; flex-shrink: 0; }
.filt-cat-wrap {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 200px;
}
.filt-cat-search {
    background: var(--bg-dark);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: .82rem;
    width: 100%;
}
.filt-cat-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-height: 180px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 6px 8px;
    background: var(--bg-dark);
}
.filt-cat-label {
    font-size: .82rem;
    cursor: pointer;
    white-space: nowrap;
    color: var(--text-primary);
}
.filt-cat-label:hover { color: var(--accent); }
.filt-cat-actions { display: flex; gap: 6px; }


/* ─── Data Explorer (Overview tab paginated table) ───────────────────────── */
.dt-sortable .dt-th:hover { color: var(--accent); background: var(--bg-hover, rgba(108,99,255,.08)); }
.dt-sortable .dt-th.dt-sorted { color: var(--accent); }
.dt-page-btn.active { background: var(--accent) !important; color: #fff !important; border-color: var(--accent) !important; }
#dt-filters-toggle.active { background: rgba(108,99,255,.15); border-color: var(--accent); color: var(--accent); }
#dt-card .btn-secondary { background: var(--bg-input); border: 1px solid var(--border); color: var(--text-primary); border-radius: 6px; cursor: pointer; }
#dt-card .btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ─── AI Streaming cursor ─────────────────────────────────────────────────── */
@keyframes blink { 0%,100% { opacity:1 } 50% { opacity:0 } }
.ai-cursor { animation: blink 1s step-end infinite; color: var(--accent); }

/* ─── Sidebar user bar ───────────────────────────────────────────────────── */
.sidebar-user-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.55rem 0.6rem;
    margin-top: 0.5rem;
    border-top: 1px solid var(--border);
    gap: 0.4rem;
}
.sidebar-user-info {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    flex: 1;
}
.sidebar-user-info i { color: var(--accent); flex-shrink: 0; }
.sidebar-user-actions { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }
.sidebar-icon-btn {
    background: none;
    border: 1px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 5px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.sidebar-icon-btn:hover { background: var(--bg-input); color: var(--text-primary); border-color: var(--border); }
.sidebar-icon-btn--danger:hover { color: var(--danger); border-color: var(--danger); }

/* ─── Save session inline form ───────────────────────────────────────────── */
.save-session-inline {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.3rem 0.6rem 0.4rem;
}
.save-session-inline input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text-primary);
    font-size: 0.82rem;
    padding: 0.3rem 0.5rem;
    outline: none;
}
.save-session-inline input:focus { border-color: var(--accent); }
.btn-xs {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 5px;
    padding: 0 0.45rem;
    height: 26px;
    font-size: 0.78rem;
    transition: background var(--transition);
}
.btn-xs:hover { border-color: var(--accent); color: var(--accent); }
.btn-xs.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-xs.btn-primary:hover { background: var(--accent-hover); }

/* ─── Session restore banner ─────────────────────────────────────────────── */
#session-restore-banner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    background: rgba(209,140,78,.08);
    border: 1px solid rgba(209,140,78,.35);
    border-radius: var(--radius);
    padding: 0.8rem 1rem;
    margin-bottom: 1.2rem;
}
.session-banner-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    flex: 1;
}
.session-banner-content > i { color: var(--accent); }
#session-restore-list { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.3rem; width: 100%; }
.session-restore-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.4rem 0.75rem;
    font-size: 0.83rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-direction: column;
    align-items: flex-start;
    transition: border-color var(--transition);
}
.session-restore-btn:hover { border-color: var(--accent); }
.session-restore-btn small { color: var(--text-secondary); font-size: 0.75rem; }
.session-banner-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    flex-shrink: 0;
    padding: 0.2rem;
}
.session-banner-close:hover { color: var(--text-primary); }

/* ─── Modal overlay ─────────────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.65);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 420px;
    box-shadow: 0 8px 32px rgba(0,0,0,.5);
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
}
.modal-title { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    padding: 0.2rem;
}
.modal-close:hover { color: var(--text-primary); }
.modal-body { padding: 1.25rem; }
.modal-footer {
    display: flex;
    gap: 0.6rem;
    justify-content: flex-end;
    padding: 0.9rem 1.25rem;
    border-top: 1px solid var(--border);
}

/* ─── Admin Users panel ──────────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.15rem 0.5rem;
    border-radius: 99px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}
.badge-admin { background: rgba(209,140,78,.18); color: var(--accent); }
.badge-user  { background: rgba(157,157,157,.12); color: var(--text-secondary); }
.btn-danger {
    background: rgba(244,71,71,.12);
    border-color: rgba(244,71,71,.3);
    color: var(--danger);
}
.btn-danger:hover { background: rgba(244,71,71,.22); border-color: var(--danger); }

/* ─── form-control (generic input) ──────────────────────────────────────── */
.form-control {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text-primary);
    font-size: 0.9rem;
    padding: 0.45rem 0.7rem;
    width: 100%;
    outline: none;
    transition: border-color var(--transition);
}
.form-control:focus { border-color: var(--accent); }

/* ─── result-msg ─────────────────────────────────────────────────────────── */
.result-msg { font-size: 0.85rem; padding: 0.3rem 0; }
.text-muted { color: var(--text-secondary); font-size: 0.88rem; }

/* ─── Help system ────────────────────────────────────────────────────────── */
.help-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: transparent;
    border: 1.5px solid var(--text-secondary);
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 700;
    cursor: pointer;
    margin-left: 10px;
    vertical-align: middle;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
    line-height: 1;
    padding: 0;
    flex-shrink: 0;
}
.help-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(255,165,0,0.08);
}

/* Parameter tooltip (ⓘ icon) */
.help-tip {
    cursor: help;
    font-size: 0.72rem;
    color: var(--text-secondary);
    display: inline-block;
    vertical-align: middle;
    margin-left: 3px;
    position: relative;
}
.help-tip::after {
    content: attr(data-tip);
    position: absolute;
    bottom: calc(100% + 7px);
    left: 0;
    transform: none;
    background: #1a1f2e;
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 0.78rem;
    font-weight: 400;
    padding: 7px 11px;
    border-radius: 7px;
    white-space: normal;
    width: 240px;
    z-index: 1500;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s;
    line-height: 1.45;
    box-shadow: 0 4px 14px rgba(0,0,0,.45);
    text-align: left;
}
.help-tip:hover::after { opacity: 1; }

/* Help modal content */
#help-modal .modal-box { max-width: 560px; }
#help-modal .modal-body { overflow-y: auto; max-height: 70vh; }
#help-modal .modal-body h4 { color: var(--accent); font-size: .83rem; margin: 14px 0 5px; text-transform: uppercase; letter-spacing: .04em; }
#help-modal .modal-body p { font-size: .88rem; color: var(--text-primary); line-height: 1.6; margin: 0 0 6px; }
#help-modal .modal-body ul { font-size: .87rem; color: var(--text-primary); line-height: 1.65; padding-left: 20px; margin: 0 0 6px; }
#help-modal .modal-body li { margin-bottom: 3px; }

/* ─── Feedback floating button ────────────────────────────────────────────── */
#feedback-fab {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 900;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent);
    color: #1e1e1e;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 4px 16px rgba(0,0,0,.4);
    transition: transform .15s, box-shadow .15s;
}
#feedback-fab:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 24px rgba(0,0,0,.5);
}

/* ─── Feedback modal ──────────────────────────────────────────────────────── */
#feedback-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.6);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.feedback-modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    width: 100%;
    max-width: 520px;
    display: flex;
    flex-direction: column;
    gap: 0;
    box-shadow: 0 8px 40px rgba(0,0,0,.5);
}
.feedback-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    font-weight: 600;
    font-size: .95rem;
}
.feedback-modal-header button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    padding: 2px 6px;
    border-radius: 4px;
}
.feedback-modal-header button:hover { color: var(--text-primary); }
.feedback-modal-body {
    padding: 20px;
}
.feedback-modal-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}
.feedback-type-row {
    display: flex;
    gap: 8px;
}
.feedback-type-btn {
    flex: 1;
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-panel);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: .85rem;
    transition: all .15s;
}
.feedback-type-btn.active {
    background: rgba(209,140,78,.15);
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 600;
}
.feedback-label {
    display: block;
    font-size: .82rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}
.feedback-file-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px dashed var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: .83rem;
    cursor: pointer;
    transition: border-color .15s, color .15s;
}
.feedback-file-label:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ─── Feedback panel layout ──────────────────────────────────────────────────── */
.feedback-panel-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
    margin-top: 1.2rem;
}
@media (max-width: 860px) {
    .feedback-panel-body { grid-template-columns: 1fr; }
}
.fp-history-item {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
}
.fp-history-item:last-child { border-bottom: none; }
.fp-history-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 6px;
    font-size: .82rem;
}
.fp-history-type { font-weight: 600; color: var(--text-primary); }
.fp-history-date { color: var(--text-secondary); }
.fp-history-status { text-transform: uppercase; font-size: .72rem; font-weight: 700; letter-spacing: .04em; }
.fp-history-msg {
    font-size: .87rem;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-word;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    line-height: 1.5;
}
.fp-history-attach {
    margin-top: 6px;
    font-size: .78rem;
    color: var(--text-secondary);
}

/* ─── Feedback resolution box (user view) ──────────────────────────────────── */
.fp-resolution-box {
    margin-top: 10px;
    padding: 10px 14px;
    background: rgba(34,197,94,.07);
    border: 1px solid rgba(34,197,94,.25);
    border-radius: 6px;
}
.fp-resolution-label {
    font-size: .75rem;
    font-weight: 700;
    color: #22c55e;
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 5px;
}
.fp-resolution-text {
    font-size: .87rem;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-word;
}
.fp-resolution-date {
    margin-top: 5px;
    font-size: .75rem;
    color: var(--text-secondary);
}

/* ─── Email inline edit in users table ─────────────────────────────────────── */
.user-email-cell { white-space: nowrap; }
.user-email-display { display: inline-flex; align-items: center; }
.user-email-form { display: inline-flex; align-items: center; gap: 4px; }
.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 2px 4px;
    border-radius: 3px;
}
.btn-icon:hover { color: var(--accent); }