[data-theme="dark"] {
    --primary-color: #1a252f;
    --secondary-color: #2980b9;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-card: #2d2d2d;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --border-color: #404040;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: rotate(20deg);
}

/* Dark Mode Styles */
[data-theme="dark"] body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

[data-theme="dark"] .main-header {
    background-color: var(--primary-color);
    box-shadow: 0 2px 4px var(--shadow-color);
}

[data-theme="dark"] .sidebar {
    background-color: var(--bg-secondary);
    box-shadow: -2px 0 4px var(--shadow-color);
}

[data-theme="dark"] .sidebar-link {
    color: var(--text-primary);
}

[data-theme="dark"] .sidebar-link:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--secondary-color);
}

[data-theme="dark"] .sidebar-link.active {
    background-color: rgba(41, 128, 185, 0.2);
    color: var(--secondary-color);
}

[data-theme="dark"] .sidebar-toggle {
    background-color: var(--primary-color);
}

[data-theme="dark"] .sidebar-toggle:hover {
    background-color: #0d1419;
}

/* Cards */
[data-theme="dark"] .card,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .project-card {
    background-color: var(--bg-card);
    box-shadow: 0 2px 4px var(--shadow-color);
    color: var(--text-primary);
}

[data-theme="dark"] .stat-card:hover,
[data-theme="dark"] .project-card:hover {
    box-shadow: 0 4px 8px var(--shadow-color);
}

[data-theme="dark"] .stat-card .stat-label {
    color: var(--text-secondary);
}

/* Form Elements */
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: var(--bg-secondary);
    border-color: var(--secondary-color);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(41, 128, 185, 0.25);
}

[data-theme="dark"] .form-control::placeholder {
    color: var(--text-muted);
}

[data-theme="dark"] .form-label {
    color: var(--text-secondary);
}

/* Alerts */
[data-theme="dark"] .alert-info {
    background-color: rgba(52, 152, 219, 0.2);
    border-color: rgba(52, 152, 219, 0.3);
    color: #5dade2;
}

[data-theme="dark"] .alert-danger {
    background-color: rgba(231, 76, 60, 0.2);
    border-color: rgba(231, 76, 60, 0.3);
    color: #ec7063;
}

[data-theme="dark"] .alert-success {
    background-color: rgba(39, 174, 96, 0.2);
    border-color: rgba(39, 174, 96, 0.3);
    color: #58d68d;
}

[data-theme="dark"] .alert-warning {
    background-color: rgba(243, 156, 18, 0.2);
    border-color: rgba(243, 156, 18, 0.3);
    color: #f5b041;
}

/* Buttons */
[data-theme="dark"] .btn-secondary {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .btn-secondary:hover {
    background-color: #3d3d3d;
    border-color: #505050;
    color: var(--text-primary);
}

[data-theme="dark"] .btn-outline-secondary {
    color: var(--text-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .btn-outline-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

/* Tables */
[data-theme="dark"] .table {
    color: var(--text-primary);
}

[data-theme="dark"] .table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: rgba(255, 255, 255, 0.02);
}

[data-theme="dark"] .table-bordered > :not(caption) > * > * {
    border-color: var(--border-color);
}

/* Step Indicator */
[data-theme="dark"] .step-indicator::before {
    background-color: var(--border-color);
}

[data-theme="dark"] .step-number {
    background-color: var(--border-color);
}

[data-theme="dark"] .step.active .step-number {
    background-color: var(--secondary-color);
}

[data-theme="dark"] .step.completed .step-number {
    background-color: var(--success-color);
}

/* Score Display */
[data-theme="dark"] .score-bg {
    stroke: var(--border-color);
}

[data-theme="dark"] .score-label {
    color: var(--text-secondary);
}

[data-theme="dark"] .score-item {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .score-bar {
    background-color: var(--border-color);
}

[data-theme="dark"] .score-item .score-value {
    color: var(--text-primary);
}

/* Summary Items */
[data-theme="dark"] .summary-item {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .summary-item label {
    color: var(--text-secondary);
}

[data-theme="dark"] .summary-value {
    color: var(--text-primary);
}

/* Info Items */
[data-theme="dark"] .info-item {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .info-item label {
    color: var(--text-secondary);
}

/* Timeline */
[data-theme="dark"] .timeline::before {
    background-color: var(--border-color);
}

[data-theme="dark"] .timeline-marker {
    background-color: var(--secondary-color);
    box-shadow: 0 0 0 2px var(--border-color);
}

[data-theme="dark"] .timeline-content {
    color: var(--text-primary);
}

/* Important Toggle */
[data-theme="dark"] .important-toggle {
    background-color: rgba(41, 128, 185, 0.1);
    border-color: var(--secondary-color);
}

[data-theme="dark"] .important-toggle .form-check-label {
    color: var(--text-primary);
}

/* Settings */
[data-theme="dark"] .settings-tabs {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .settings-tab {
    color: var(--text-secondary);
}

[data-theme="dark"] .settings-tab:hover,
[data-theme="dark"] .settings-tab.active {
    color: var(--secondary-color);
}

[data-theme="dark"] .weight-item,
[data-theme="dark"] .city-item {
    background-color: var(--bg-secondary);
}

/* Miscellaneous */
[data-theme="dark"] .bg-light {
    background-color: var(--bg-secondary) !important;
}

[data-theme="dark"] .text-muted {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .border {
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .modal-content {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

[data-theme="dark"] .modal-header {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .modal-footer {
    border-top-color: var(--border-color);
}

[data-theme="dark"] .close,
[data-theme="dark"] .btn-close {
    filter: invert(1);
}


/* Score Breakdown Detail */
[data-theme="dark"] .score-item-detail {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] .score-item-detail .score-value {
    color: var(--text-primary);
    font-weight: 600;
}

/* Stat Cards with Gradient Backgrounds */
[data-theme="dark"] .stat-card.success {
    background: linear-gradient(to left, rgba(39, 174, 96, 0.15), var(--bg-card));
}

[data-theme="dark"] .stat-card.warning {
    background: linear-gradient(to left, rgba(243, 156, 18, 0.15), var(--bg-card));
}

[data-theme="dark"] .stat-card.danger {
    background: linear-gradient(to left, rgba(231, 76, 60, 0.15), var(--bg-card));
}

/* Smooth transitions */
body,
.main-header,
.sidebar,
.card,
.stat-card,
.project-card,
.form-control,
.form-select,
.btn,
.alert,
.table,
.summary-item,
.info-item,
.score-item {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Compare Page Specific dark mode styles */
[data-theme="dark"] .comparison-table {
    background-color: var(--bg-card);
}

[data-theme="dark"] .comparison-table th,
[data-theme="dark"] .comparison-table td {
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .project-header h6 {
    color: var(--text-primary);
}

[data-theme="dark"] .comparison-value {
    color: var(--text-primary);
    font-weight: 600;
}

[data-theme="dark"] .project-status {
    opacity: 0.9;
}

[data-theme="dark"] .project-status.status-approved {
    background-color: var(--success-color);
}

[data-theme="dark"] .project-status.status-pending {
    background-color: var(--warning-color);
}

[data-theme="dark"] .project-status.status-rejected {
    background-color: var(--danger-color);
}

/* Chart container dark mode */
[data-theme="dark"] .chart-container {
    background-color: var(--bg-card);
}

/* Compare Page - Comparison Table Dark Mode */
[data-theme="dark"] .comparison-table {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

[data-theme="dark"] .comparison-table thead {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .comparison-table th {
    background-color: #1a252f;
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .comparison-table td {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .comparison-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

[data-theme="dark"] .comparison-table strong {
    color: var(--text-secondary);
}

[data-theme="dark"] .project-header {
    background-color: transparent;
}

[data-theme="dark"] .project-header h6 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

[data-theme="dark"] .comparison-value {
    color: var(--text-primary);
    font-weight: 600;
}

[data-theme="dark"] .comparison-table .text-success {
    color: #58d68d !important;
}

/* Badge colors in dark mode */
[data-theme="dark"] .badge.bg-success {
    background-color: rgba(39, 174, 96, 0.8) !important;
    color: #ffffff;
}

[data-theme="dark"] .badge.bg-warning {
    background-color: rgba(243, 156, 18, 0.8) !important;
    color: #ffffff;
}

[data-theme="dark"] .badge.bg-danger {
    background-color: rgba(231, 76, 60, 0.8) !important;
    color: #ffffff;
}

/* Multi-select styling */
#projectSelector {
    min-height: 200px;
    cursor: pointer;
}

#projectSelector option {
    padding: 8px 12px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

#projectSelector option:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

#projectSelector option:checked {
    background-color: #3498db;
    color: white;
}

/* Dark mode multi-select */
[data-theme="dark"] #projectSelector {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] #projectSelector option {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] #projectSelector option:hover {
    background-color: rgba(52, 152, 219, 0.2);
}

[data-theme="dark"] #projectSelector option:checked {
    background-color: var(--secondary-color);
    color: white;
}

/* File Upload Dark Mode */
[data-theme="dark"] .upload-area {
    background-color: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

[data-theme="dark"] .upload-area:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

[data-theme="dark"] .file-item {
    background-color: var(--dark-bg-secondary);
}

[data-theme="dark"] .file-item:hover {
    background-color: var(--dark-bg-tertiary);
}

[data-theme="dark"] .file-meta {
    color: var(--dark-text-secondary);
}

/* Comments Dark Mode */
[data-theme="dark"] .comment-item {
    background-color: var(--dark-bg-secondary);
    border-right-color: var(--dark-primary);
}

[data-theme="dark"] .comment-author {
    color: var(--dark-primary);
}

[data-theme="dark"] .comment-role,
[data-theme="dark"] .comment-time {
    color: var(--dark-text-secondary);
}

[data-theme="dark"] .comment-body {
    color: var(--dark-text);
}

[data-theme="dark"] .empty-state {
    color: var(--dark-text-secondary);
}

[data-theme="dark"] .empty-state i {
    opacity: 0.3;
}

/* ── General Info Card dark mode — desktop pronounced style ── */
@media (min-width: 768px) {
    [data-theme="dark"] .col-md-6:first-child .info-item label {
        color: var(--text-primary);
    }

    [data-theme="dark"] .col-md-6:first-child .info-item span {
        color: var(--text-primary);
    }
}

/* ── General Info Card — Tile Grid dark mode ── */
[data-theme="dark"] .info-tile {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .info-tile:hover {
    box-shadow: 0 3px 10px var(--shadow-color);
}

[data-theme="dark"] .info-tile--full {
    background: linear-gradient(
        to left,
        rgba(41, 128, 185, 0.15),
        rgba(41, 128, 185, 0.05)
    );
    border-color: rgba(41, 128, 185, 0.3);
}

[data-theme="dark"] .info-tile-label {
    color: var(--text-muted);
}

[data-theme="dark"] .info-tile-value {
    color: var(--text-primary);
}

[data-theme="dark"] .info-tile-value--hero {
    color: var(--secondary-color);
}

[data-theme="dark"] .info-tile-unit {
    color: var(--text-muted);
}

/* Mobile dark mode — restore border-bottom */
@media (max-width: 767.98px) {
    [data-theme="dark"] .info-tile {
        border-color: transparent;
        border-bottom-color: var(--border-color);
        background: transparent;
    }

    [data-theme="dark"] .info-tile--full {
        background: transparent;
        border-color: transparent;
        border-bottom-color: var(--border-color);
    }

    [data-theme="dark"] .info-tile-value--hero {
        color: var(--text-primary);
    }
}

/* =====================================================
   Calculations Card — dark mode
   ===================================================== */

[data-theme="dark"] .calc-section {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .calc-section--output {
    background-color: rgba(41, 128, 185, 0.08);
    border-color: rgba(41, 128, 185, 0.2);
}

[data-theme="dark"] .calc-section--input {
    background-color: rgba(243, 156, 18, 0.06);
    border-color: rgba(243, 156, 18, 0.15);
}

[data-theme="dark"] .calc-section--missing {
    background-color: rgba(243, 156, 18, 0.05);
    border-color: rgba(243, 156, 18, 0.15);
}

[data-theme="dark"] .calc-section-header {
    color: var(--text-secondary);
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .calc-section--output .calc-section-header {
    color: #5dade2;
    border-bottom-color: rgba(41, 128, 185, 0.25);
}

[data-theme="dark"] .calc-section--output .calc-section-header i {
    color: #5dade2;
}

[data-theme="dark"] .calc-section--input .calc-section-header {
    color: #f5b041;
    border-bottom-color: rgba(243, 156, 18, 0.2);
}

[data-theme="dark"] .calc-section--input .calc-section-header i {
    color: var(--warning-color);
}

[data-theme="dark"] .calc-section--missing .calc-section-header {
    color: #f5b041;
    border-bottom-color: rgba(243, 156, 18, 0.2);
}

[data-theme="dark"] .calc-row {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .calc-row--highlight {
    background-color: rgba(39, 174, 96, 0.08);
    border-bottom-color: rgba(39, 174, 96, 0.15);
}

[data-theme="dark"] .calc-label {
    color: var(--text-secondary);
}

[data-theme="dark"] .calc-value {
    color: var(--text-primary);
}

[data-theme="dark"] .missing-item {
    color: #f5b041;
}

[data-theme="dark"] .all-complete {
    color: #58d68d;
}

/* =====================================================
   Tabu Cards & Tables — dark mode
   ===================================================== */

[data-theme="dark"] .tabu-card {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    box-shadow: 0 1px 4px var(--shadow-color);
}

[data-theme="dark"] .tabu-card:hover {
    box-shadow: 0 3px 10px var(--shadow-color);
}

[data-theme="dark"] .tabu-card-header {
    background-color: var(--bg-secondary);
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .tabu-card-title {
    color: var(--text-primary);
}

[data-theme="dark"] .tabu-card-meta {
    color: var(--text-muted);
}

[data-theme="dark"] .tabu-meta-pill {
    background-color: rgba(41, 128, 185, 0.15);
    color: #5dade2;
    border-color: rgba(41, 128, 185, 0.25);
}

/* Status banners */
[data-theme="dark"] .tabu-status-banner--processing {
    background-color: rgba(41, 128, 185, 0.12);
    border-color: rgba(41, 128, 185, 0.25);
    color: #5dade2;
}

[data-theme="dark"] .tabu-status-banner--success {
    background-color: rgba(39, 174, 96, 0.1);
    border-color: rgba(39, 174, 96, 0.25);
    color: #58d68d;
}

[data-theme="dark"] .tabu-status-banner--failed {
    background-color: rgba(243, 156, 18, 0.1);
    border-color: rgba(243, 156, 18, 0.25);
    color: #f5b041;
}

/* Table sections */
[data-theme="dark"] .tabu-table-section {
    border-color: var(--border-color);
}

[data-theme="dark"] .tabu-table-label {
    background-color: var(--bg-secondary);
    border-bottom-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .tabu-table-label i {
    color: #5dade2;
}

/* Table cells */
[data-theme="dark"] .tabu-table thead tr {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .tabu-table thead th {
    color: var(--text-secondary);
    border-bottom-color: var(--border-color);
    border-right-color: var(--border-color);
}

[data-theme="dark"] .tabu-table tbody td {
    color: var(--text-primary);
    border-bottom-color: rgba(255, 255, 255, 0.04);
    border-right-color: rgba(255, 255, 255, 0.04);
}

[data-theme="dark"] .tabu-table tbody tr:hover td {
    background-color: rgba(255, 255, 255, 0.03);
}

[data-theme="dark"] .tabu-table--summary tbody td:nth-child(3),
[data-theme="dark"] .tabu-table--summary tbody td:nth-child(4),
[data-theme="dark"] .tabu-table--summary tbody td:nth-child(5) {
    color: var(--text-primary);
}

[data-theme="dark"] .tabu-table--detail tbody td:first-child {
    color: #5dade2;
}

[data-theme="dark"] .tabu-note-type-badge {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border-color: var(--border-color);
}

/* Unified view — plot separator + grand-total rows */
[data-theme="dark"] .tabu-table--unified tbody tr.tabu-plot-group-row td,
[data-theme="dark"] .tabu-table--unified tbody tr.tabu-plot-group-row:hover td,
[data-theme="dark"] .tabu-table--unified tbody tr.tabu-grand-total-row td,
[data-theme="dark"] .tabu-table--unified tbody tr.tabu-grand-total-row:hover td {
    background-color: var(--bg-secondary);
    border-top-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .tabu-plot-group-title {
    color: var(--text-primary);
}

[data-theme="dark"] .tabu-view-toggle .btn.active {
    background-color: #2980b9;
    border-color: #2980b9;
    color: #fff;
}