/* Scikit-Learner - Styles */

:root {
    --panel-bg: #f8f9fa;
    --panel-border: #dee2e6;
    --header-bg: #e9ecef;
    --primary-color: #0d6efd;
    --success-color: #198754;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Toolbar */
.toolbar {
    flex-shrink: 0;
}

/* Main Container - 3 Column Layout */
.main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Left Panel - Models */
.left-panel {
    width: 280px;
    min-width: 280px;
    background: var(--panel-bg);
    border-right: 1px solid var(--panel-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Center Panel - Visualizations */
.center-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #fff;
}

/* Right Panel - Settings */
.right-panel {
    width: 250px;
    min-width: 250px;
    background: var(--panel-bg);
    border-left: 1px solid var(--panel-border);
    overflow-y: auto;
}

/* Panel Headers */
.panel-header {
    background: var(--header-bg);
    padding: 8px 12px;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    color: #495057;
    border-bottom: 1px solid var(--panel-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Panel Sections */
.panel-section {
    border-bottom: 1px solid var(--panel-border);
}

/* Model List */
.model-list {
    flex: 1;
    overflow-y: auto;
    min-height: 200px;
}

.model-item {
    padding: 10px 12px;
    border-bottom: 1px solid var(--panel-border);
    cursor: pointer;
    transition: background-color 0.15s;
}

.model-item:hover {
    background-color: #e9ecef;
}

.model-item.selected {
    background-color: #cfe2ff;
    border-left: 3px solid var(--primary-color);
}

.model-item .model-name {
    font-weight: 500;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.model-item .model-meta {
    font-size: 11px;
    color: #6c757d;
    margin-top: 3px;
}

.model-item .model-score {
    font-weight: 600;
    color: var(--success-color);
}

.model-item .model-score.poor {
    color: var(--danger-color);
}

.model-item .model-score.medium {
    color: var(--warning-color);
}

/* Model Category Badge */
.category-badge {
    font-size: 9px;
    padding: 2px 6px;
    border-radius: 3px;
    text-transform: uppercase;
    font-weight: 600;
}

.category-badge.linear { background: #d1e7dd; color: #0f5132; }
.category-badge.tree { background: #fff3cd; color: #664d03; }
.category-badge.ensemble { background: #cff4fc; color: #055160; }
.category-badge.svm { background: #f8d7da; color: #842029; }
.category-badge.neighbors { background: #e2d9f3; color: #432874; }
.category-badge.neural { background: #d3d3d3; color: #333; }

/* Available Models */
.available-models {
    overflow-y: auto;
    flex: 1;
    min-height: 150px;
}

.model-category {
    padding: 6px 12px;
    background: #e9ecef;
    font-size: 11px;
    font-weight: 600;
    color: #495057;
    text-transform: uppercase;
    position: sticky;
    top: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Task type tags for model categories */
.task-tag {
    font-size: 9px;
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: 600;
    text-transform: uppercase;
}

.task-tag.regression {
    background: #dbeafe;
    color: #1d4ed8;
}

.task-tag.classification {
    background: #fef3c7;
    color: #b45309;
}

.available-model-item {
    padding: 6px 12px;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid #f0f0f0;
}

.available-model-item:hover {
    background: #e9ecef;
}

.available-model-item input[type="checkbox"] {
    margin: 0;
}

/* Visualization Area */
#visualizationArea {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

/* Plot Container */
.plot-container {
    width: 100%;
    height: 100%;
    min-height: 400px;
}

/* Tabs */
#vizTabs {
    background: #f8f9fa;
    border-bottom: 1px solid var(--panel-border);
}

#vizTabs .nav-link {
    font-size: 12px;
    padding: 8px 16px;
    color: #495057;
    border-radius: 0;
}

#vizTabs .nav-link.active {
    background: #fff;
    border-bottom-color: #fff;
}

#vizTabs .nav-link i {
    margin-right: 4px;
}

.tab-content {
    flex: 1;
    overflow: hidden;
}

.tab-pane {
    height: 100%;
}

/* Info Bar */
.info-bar {
    font-size: 12px;
    flex-shrink: 0;
}

/* Buttons */
.btn-sm {
    font-size: 12px;
}

/* Form Controls */
.form-select-sm, .form-control-sm {
    font-size: 12px;
}

.form-label {
    font-weight: 500;
    margin-bottom: 4px;
}

/* Tables */
.table-sm {
    font-size: 12px;
}

/* Modals */
.modal-body {
    max-height: 70vh;
    overflow-y: auto;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a1a1a1;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #6c757d;
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h5 {
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 13px;
}

/* Training Progress */
.training-progress {
    padding: 16px;
    background: #f8f9fa;
    border-radius: 8px;
    margin: 16px;
}

.training-progress .progress {
    height: 8px;
    margin-top: 8px;
}

/* Responsive */
@media (max-width: 1200px) {
    .left-panel {
        width: 240px;
        min-width: 240px;
    }
    .right-panel {
        width: 220px;
        min-width: 220px;
    }
}

@media (max-width: 992px) {
    .main-container {
        flex-direction: column;
    }
    .left-panel, .right-panel {
        width: 100%;
        min-width: 100%;
        max-height: 200px;
    }
    .center-panel {
        min-height: 400px;
    }
}

/* Tooltips */
[data-tooltip] {
    position: relative;
}

[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 8px;
    background: #333;
    color: #fff;
    font-size: 11px;
    white-space: nowrap;
    border-radius: 4px;
    z-index: 1000;
}

/* Model comparison table */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 8px 12px;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

.comparison-table th {
    background: #f8f9fa;
    font-weight: 600;
    font-size: 12px;
}

.comparison-table tr:hover {
    background: #f8f9fa;
}

.comparison-table .rank-1 {
    background: #d4edda;
}

.comparison-table .rank-2 {
    background: #fff3cd;
}

.comparison-table .rank-3 {
    background: #f8d7da;
}

/* Feature importance bars */
.feature-bar {
    height: 16px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.feature-importance-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.feature-importance-item .label {
    width: 100px;
    font-size: 11px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.feature-importance-item .bar-container {
    flex: 1;
    height: 16px;
    background: #e9ecef;
    border-radius: 2px;
    margin: 0 8px;
}

.feature-importance-item .value {
    width: 50px;
    font-size: 11px;
    text-align: right;
}

/* Welcome View - Redesigned */
.welcome-view {
    display: flex;
    gap: 20px;
    height: 100%;
    padding: 20px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    overflow-y: auto;
}

.welcome-main {
    flex: 1;
    max-width: 480px;
}

.welcome-sidebar {
    width: 220px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Welcome Card */
.welcome-card {
    background: #fff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.welcome-card-header {
    padding: 12px 16px;
    border-bottom: 1px solid #f1f5f9;
    font-weight: 600;
    font-size: 14px;
    color: #334155;
    display: flex;
    align-items: center;
    gap: 8px;
}

.welcome-card-header i {
    color: #3b82f6;
}

.welcome-card-header small {
    font-weight: 400;
    color: #94a3b8;
    margin-left: auto;
    font-size: 11px;
}

.welcome-card-footer {
    padding: 12px;
    background: #f8fafc;
    border-top: 1px solid #f1f5f9;
}

/* Dataset List */
.dataset-list {
    max-height: 280px;
    overflow-y: auto;
}

.dataset-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    cursor: pointer;
    border-bottom: 1px solid #f1f5f9;
    transition: background 0.15s;
}

.dataset-item:hover {
    background: #f8fafc;
}

.dataset-item:last-child {
    border-bottom: none;
}

.dataset-icon {
    font-size: 24px;
    width: 36px;
    text-align: center;
}

.dataset-info {
    flex: 1;
    min-width: 0;
}

.dataset-name {
    font-weight: 500;
    font-size: 13px;
    color: #1e293b;
    display: flex;
    align-items: center;
    gap: 6px;
}

.dataset-meta {
    font-size: 11px;
    color: #64748b;
    margin-top: 2px;
}

.type-badge {
    font-size: 9px;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
}

.type-badge.regression {
    background: #dbeafe;
    color: #1d4ed8;
}

.type-badge.classification {
    background: #fef3c7;
    color: #b45309;
}

.dataset-load-btn {
    opacity: 0;
    padding: 4px 10px;
    background: #3b82f6;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.15s;
}

.dataset-item:hover .dataset-load-btn {
    opacity: 1;
}

.dataset-load {
    opacity: 0;
    color: #3b82f6;
    transition: opacity 0.15s, transform 0.15s;
}

.dataset-item:hover .dataset-load {
    opacity: 1;
    transform: translateX(4px);
}

/* Upload Button */
.upload-btn {
    width: 100%;
    padding: 10px;
    border: 2px dashed #cbd5e1;
    background: transparent;
    border-radius: 8px;
    color: #64748b;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.upload-btn:hover {
    border-color: #3b82f6;
    color: #3b82f6;
    background: #eff6ff;
}

/* Task Actions */
.task-actions {
    display: flex;
    gap: 10px;
    margin-top: 12px;
}

.task-btn {
    flex: 1;
    padding: 14px 12px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    text-align: left;
    transition: transform 0.15s, box-shadow 0.15s;
}

.task-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.task-btn.regression {
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    color: #fff;
}

.task-btn.classification {
    background: linear-gradient(135deg, #10b981 0%, #14b8a6 100%);
    color: #fff;
}

.task-btn.active {
    box-shadow: 0 0 0 3px rgba(0,0,0,0.2);
    transform: scale(0.98);
}

.task-btn.active:hover {
    transform: scale(0.98);
}

.task-btn i {
    font-size: 20px;
    display: block;
    margin-bottom: 6px;
    opacity: 0.9;
}

.task-btn span {
    font-weight: 600;
    font-size: 13px;
    display: block;
}

.task-btn small {
    font-size: 10px;
    opacity: 0.8;
}

/* Workflow Card */
.workflow-card {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border-radius: 10px;
    padding: 14px;
    color: #fff;
}

.workflow-header {
    font-weight: 600;
    font-size: 12px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.workflow-header i {
    color: #fbbf24;
}

.workflow-steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.workflow-step {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 11px;
    color: #94a3b8;
}

.workflow-step span {
    width: 20px;
    height: 20px;
    background: #475569;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: #cbd5e1;
}

/* Concepts Card */
.concepts-card {
    background: #fff;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
    padding: 14px;
}

.concepts-header {
    font-weight: 600;
    font-size: 12px;
    color: #334155;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.concepts-header i {
    color: #f59e0b;
}

.concept {
    padding: 8px 10px;
    border-radius: 6px;
    margin-bottom: 6px;
}

.concept:last-child {
    margin-bottom: 0;
}

.concept strong {
    font-size: 11px;
    display: block;
}

.concept span {
    font-size: 10px;
}

.regression-concept {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
}

.regression-concept strong {
    color: #1d4ed8;
}

.regression-concept span {
    color: #3b82f6;
}

.classification-concept {
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
}

.classification-concept strong {
    color: #047857;
}

.classification-concept span {
    color: #10b981;
}

/* Collapsible panel header */
.panel-header.collapsible {
    cursor: pointer;
    user-select: none;
}

.panel-header.collapsible:hover {
    background: #dfe5ec;
}

.panel-header .bi-chevron-down {
    transition: transform 0.2s;
    font-size: 10px;
    margin-right: 4px;
}

.panel-header .bi-chevron-down.collapsed {
    transform: rotate(-90deg);
}

/* Task Type Badge in toolbar */
.task-type-badge {
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 500;
}

.task-type-badge.regression {
    background: #d1e7dd;
    color: #0f5132;
}

.task-type-badge.classification {
    background: #cff4fc;
    color: #055160;
}

/* Modal Dataset List */
.sample-dataset-list {
    max-height: 300px;
    overflow-y: auto;
}

.modal-dataset-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.15s;
    margin-bottom: 4px;
}

.modal-dataset-item:hover {
    background: #f1f5f9;
}

.modal-dataset-item:last-child {
    margin-bottom: 0;
}

.modal-dataset-icon {
    font-size: 24px;
    width: 36px;
    text-align: center;
}

.modal-dataset-info {
    flex: 1;
    min-width: 0;
}

.modal-dataset-name {
    font-weight: 500;
    font-size: 14px;
    color: #1e293b;
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-dataset-meta {
    font-size: 12px;
    color: #64748b;
    margin-top: 2px;
}

/* Minimal Welcome View */
.welcome-view-minimal {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.welcome-content {
    text-align: center;
    padding: 40px;
}

.welcome-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.welcome-icon i {
    font-size: 36px;
    color: #fff;
}

.welcome-content h4 {
    color: #1e293b;
    margin-bottom: 8px;
}

.welcome-content p {
    margin-bottom: 24px;
}

/* Export Modal */
.export-model-list {
    max-height: 250px;
    overflow-y: auto;
}

.export-model-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: 6px;
    margin-bottom: 4px;
    background: #f8fafc;
}

.export-model-item:hover {
    background: #f1f5f9;
}

.export-model-item input[type="checkbox"] {
    margin: 0;
}

.export-model-item .model-info {
    flex: 1;
}

.export-model-item .model-name {
    font-weight: 500;
    font-size: 13px;
}

.export-model-item .model-score {
    font-size: 11px;
    color: #64748b;
}