/**
 * Advanced Features Styles
 * Dark mode, export modals, filters, comparison mode, and chart enhancements
 */

/* ========================================
   DARK MODE THEME VARIABLES
   ======================================== */
[data-theme="dark"] {
    --tableau-blue: #60a5fa;
    --tableau-navy: #e5e7eb;
    --tableau-navy-link: #93c5fd;
    --tableau-dark-navy: #f3f4f6;

    --tableau-bg-light-blue: #1e3a5f;
    --tableau-bg-off-white: #1f2937;
    --tableau-bg-white: #111827;

    --tableau-green: #34d399;
    --tableau-teal: #60a5fa;

    --tableau-text-primary: #f3f4f6;
    --tableau-text-secondary: #e5e7eb;
    --tableau-text-light: #d1d5db;

    --tableau-gray-border: #374151;
    --tableau-gray-divider: #4b5563;

    --gray-50: #1f2937;
    --gray-100: #374151;
    --gray-200: #4b5563;
    --gray-300: #6b7280;
    --gray-400: #9ca3af;
    --gray-500: #d1d5db;
    --gray-600: #e5e7eb;
    --gray-700: #f3f4f6;
    --gray-800: #f9fafb;
    --gray-900: #ffffff;

    --shadow-sm: rgba(0, 0, 0, 0.3) 0px 1px 4px -1px, rgba(0, 0, 0, 0.4) 0px 4px 8px -1px;
    --shadow-md: rgba(0, 0, 0, 0.4) 0px 2px 8px -2px, rgba(0, 0, 0, 0.5) 0px 8px 12px -2px;
    --shadow-lg: rgba(0, 0, 0, 0.5) 0px 4px 12px -2px, rgba(0, 0, 0, 0.6) 0px 12px 20px -2px;
}

.theme-transition,
.theme-transition *,
.theme-transition *:before,
.theme-transition *:after {
    transition: background-color 300ms ease, color 300ms ease, border-color 300ms ease !important;
}

/* ========================================
   THEME TOGGLE BUTTON
   ======================================== */
.theme-toggle {
    background: var(--gray-100);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    padding: 0.5rem;
    cursor: pointer;
    transition: all var(--transition-base);
    color: var(--gray-700);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--brand-primary);
    color: white;
    transform: rotate(15deg);
}

.theme-toggle:focus {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

/* ========================================
   EXPORT MODAL
   ======================================== */
.export-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
}

.export-modal.active {
    display: flex;
}

.export-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.export-modal-content {
    position: relative;
    background: var(--tableau-bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
    z-index: 1;
    animation: modalSlideUp 0.3s ease-out;
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.export-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
}

.export-modal-header h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--tableau-navy);
    margin: 0;
}

.export-modal-close {
    background: none;
    border: none;
    font-size: var(--text-3xl);
    color: var(--gray-500);
    cursor: pointer;
    line-height: 1;
    transition: color var(--transition-fast);
}

.export-modal-close:hover {
    color: var(--error);
}

.export-modal-body {
    padding: var(--space-6);
}

.export-modal-body p {
    margin-bottom: var(--space-4);
    color: var(--gray-600);
}

.export-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.export-option-btn {
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--space-6);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    text-align: center;
}

.export-option-btn:hover {
    background: var(--tableau-bg-light-blue);
    border-color: var(--brand-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.export-option-btn svg {
    color: var(--brand-primary);
}

.export-option-btn span {
    font-weight: 600;
    color: var(--tableau-navy);
    font-size: var(--text-base);
}

.export-option-btn small {
    font-size: var(--text-xs);
    color: var(--gray-600);
}

/* ========================================
   EXPORT LOADER
   ======================================== */
.export-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 10001;
    display: none;
    align-items: center;
    justify-content: center;
}

.export-loader.active {
    display: flex;
}

.export-loader-content {
    text-align: center;
    color: white;
}

.export-loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--brand-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-4);
}

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

.export-loader-message {
    font-size: var(--text-lg);
    font-weight: 500;
}

/* ========================================
   EXPORT TOAST NOTIFICATIONS
   ======================================== */
.export-toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--tableau-bg-white);
    color: var(--tableau-text-primary);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-weight: 500;
    z-index: 10002;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.export-toast.active {
    opacity: 1;
    transform: translateY(0);
}

.export-toast-success {
    border-left: 4px solid var(--success);
}

.export-toast-error {
    border-left: 4px solid var(--error);
}

/* ========================================
   FILTER TOGGLE BUTTON
   ======================================== */
.filter-toggle-btn {
    background: var(--gray-100);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 0.5rem var(--space-4);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--gray-700);
    position: relative;
}

.filter-toggle-btn:hover {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: white;
}

.filter-count {
    background: var(--error);
    color: white;
    border-radius: var(--radius-full);
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
}

/* ========================================
   FILTER PANEL
   ======================================== */
.filter-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: var(--tableau-bg-white);
    box-shadow: var(--shadow-xl);
    z-index: 1001;
    transition: right 0.3s ease-out;
    display: flex;
    flex-direction: column;
}

.filter-panel.active {
    right: 0;
}

.filter-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
}

.filter-panel-header h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--tableau-navy);
    margin: 0;
}

.filter-panel-close {
    background: none;
    border: none;
    font-size: var(--text-3xl);
    color: var(--gray-500);
    cursor: pointer;
    line-height: 1;
    transition: color var(--transition-fast);
}

.filter-panel-close:hover {
    color: var(--error);
}

.filter-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-6);
}

.filter-section {
    margin-bottom: var(--space-8);
}

.filter-section h4 {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--tableau-navy);
    margin-bottom: var(--space-4);
}

.filter-date-presets {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.filter-preset-btn {
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 0.5rem;
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--gray-700);
}

.filter-preset-btn:hover {
    background: var(--gray-100);
    border-color: var(--gray-300);
}

.filter-preset-btn.active {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: white;
}

.filter-date-custom {
    margin-top: var(--space-4);
}

.filter-input-group {
    margin-bottom: var(--space-4);
}

.filter-input-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.filter-input {
    width: 100%;
    padding: 0.5rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    background: var(--tableau-bg-white);
    color: var(--tableau-text-primary);
    transition: border-color var(--transition-fast);
}

.filter-input:focus {
    outline: none;
    border-color: var(--brand-primary);
}

.filter-checkboxes {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.filter-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.filter-checkbox:hover {
    background: var(--gray-50);
}

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

.filter-checkbox-label {
    font-size: var(--text-sm);
    color: var(--gray-700);
}

.filter-slider {
    width: 100%;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--gray-200);
    outline: none;
    margin-bottom: var(--space-2);
    -webkit-appearance: none;
}

.filter-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--brand-primary);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.filter-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.filter-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--brand-primary);
    cursor: pointer;
    border: none;
}

.filter-slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-xs);
    color: var(--gray-600);
}

.filter-slider-value {
    font-weight: 600;
    color: var(--brand-primary);
}

.filter-help-text {
    font-size: var(--text-xs);
    color: var(--gray-600);
    margin-top: var(--space-2);
}

.filter-radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.filter-radio {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.filter-radio:hover {
    background: var(--gray-50);
}

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

.filter-radio span {
    font-size: var(--text-sm);
    color: var(--gray-700);
}

.filter-panel-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--gray-200);
    display: flex;
    gap: var(--space-4);
}

.filter-btn {
    flex: 1;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: var(--text-sm);
}

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

.filter-btn-primary:hover {
    background: #0158A5;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.filter-btn-secondary {
    background: transparent;
    border: 2px solid var(--gray-300);
    color: var(--gray-700);
}

.filter-btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

/* ========================================
   COMPARISON MODE
   ======================================== */
.comparison-toggle-btn {
    background: var(--gray-100);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 0.5rem var(--space-4);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--gray-700);
}

.comparison-toggle-btn:hover,
.comparison-toggle-btn.active {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: white;
}

.comparison-panel {
    background: var(--tableau-bg-light-blue);
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
    display: none;
}

.comparison-panel.active {
    display: block;
}

.comparison-panel-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--space-6);
    flex-wrap: wrap;
}

.comparison-selector {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.comparison-selector label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: var(--text-sm);
}

.comparison-select {
    padding: 0.5rem var(--space-4);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    background: var(--tableau-bg-white);
    color: var(--tableau-text-primary);
    font-size: var(--text-sm);
    min-width: 250px;
    cursor: pointer;
}

.comparison-select:focus {
    outline: none;
    border-color: var(--brand-primary);
}

.comparison-vs {
    font-weight: 700;
    color: var(--gray-500);
    font-size: var(--text-lg);
}

.comparison-apply-btn {
    background: var(--brand-primary);
    border: 2px solid var(--brand-primary);
    color: white;
    padding: 0.5rem var(--space-6);
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: var(--text-sm);
}

.comparison-apply-btn:hover:not(:disabled) {
    background: #0158A5;
    transform: translateY(-1px);
}

.comparison-apply-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.comparison-close-btn {
    background: transparent;
    border: 2px solid var(--error);
    color: var(--error);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    line-height: 1;
    font-size: var(--text-lg);
}

.comparison-close-btn:hover {
    background: var(--error);
    color: white;
}

.comparison-split-view {
    display: none;
    gap: 0;
    height: calc(100vh - 200px);
    overflow: hidden;
}

.comparison-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--tableau-bg-white);
}

.comparison-pane-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
    background: var(--tableau-bg-light-blue);
}

.comparison-pane-header h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--tableau-navy);
    margin: 0 0 0.25rem 0;
}

.comparison-pane-timestamp {
    font-size: var(--text-sm);
    color: var(--gray-600);
}

.comparison-pane-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-6);
}

.comparison-divider {
    width: 2px;
    background: var(--gray-300);
    flex-shrink: 0;
}

.comparison-metrics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.comparison-metric-card {
    background: var(--gray-50);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    text-align: center;
}

.comparison-metric-label {
    font-size: var(--text-xs);
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.comparison-metric-value {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--tableau-navy);
}

.comparison-source-list h4 {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--tableau-navy);
    margin-bottom: var(--space-4);
}

.comparison-source-card {
    background: var(--gray-50);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
}

.comparison-source-name {
    font-weight: 600;
    color: var(--tableau-navy);
    margin-bottom: 0.5rem;
}

.comparison-source-metrics {
    display: flex;
    gap: var(--space-4);
    font-size: var(--text-sm);
    color: var(--gray-600);
}

.comparison-summary {
    background: var(--tableau-bg-white);
    padding: var(--space-8);
    border-bottom: 1px solid var(--gray-200);
    display: none;
}

.comparison-summary h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--tableau-navy);
    margin: 0 0 var(--space-6) 0;
}

.comparison-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
}

.comparison-summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.comparison-summary-label {
    font-size: var(--text-sm);
    color: var(--gray-600);
    font-weight: 500;
}

.comparison-summary-diff {
    font-size: var(--text-lg);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.comparison-summary-diff.increase {
    color: var(--success);
}

.comparison-summary-diff.decrease {
    color: var(--error);
}

.comparison-summary-diff.neutral {
    color: var(--gray-500);
}

.comparison-summary-diff small {
    font-size: var(--text-xs);
    font-weight: 500;
    opacity: 0.8;
}

/* ========================================
   ADVANCED CHART STYLES
   ======================================== */
.sankey-node {
    transition: filter var(--transition-fast);
}

.sankey-flow {
    transition: opacity var(--transition-fast), filter var(--transition-fast);
    opacity: 0.6;
}

.ridge-curve {
    transition: opacity var(--transition-fast);
}

.ridge-curve:hover {
    opacity: 1;
}

/* Chart Export Button */
.chart-export-btn {
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 0.375rem 0.75rem;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--gray-700);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.chart-export-btn:hover {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: white;
}

.chart-export-btn svg {
    width: 14px;
    height: 14px;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    .filter-panel {
        width: 100%;
        right: -100%;
    }

    .comparison-panel-content {
        flex-direction: column;
        align-items: stretch;
    }

    .comparison-select {
        min-width: 100%;
    }

    .comparison-split-view {
        flex-direction: column;
        height: auto;
    }

    .comparison-divider {
        width: 100%;
        height: 2px;
    }

    .export-modal-content {
        width: 95%;
    }

    .export-options {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    .export-loader-spinner {
        animation: none;
    }

    .filter-panel {
        transition: none;
    }

    .export-modal-content {
        animation: none;
    }
}