/* RNN Simulation Styles - Light Theme */

/* CSS Variables for theming */
:root {
    /* Light Color Palette */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --bg-code: #f5f5f5;

    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #6c757d;

    /* Accent Colors - matching Virtual Labs blue */
    --accent-blue: #0d6efd;
    --accent-blue-light: #3d8bfd;
    --accent-blue-dark: #0a58ca;
    --accent-purple: #6f42c1;
    --accent-green: #198754;
    --accent-yellow: #ffc107;
    --accent-orange: #fd7e14;
    --accent-red: #dc3545;
    --accent-cyan: #0dcaf0;
    --accent-teal: #20c997;

    /* Step States */
    --step-pending: #adb5bd;
    --step-ready: #0d6efd;
    --step-running: #ffc107;
    --step-completed: #198754;
    --step-error: #dc3545;

    /* Borders */
    --border-color: #dee2e6;
    --border-light: #e9ecef;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Sidebar Width */
    --sidebar-width: 260px;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Main Container */
.simulation-container {
    display: flex;
    min-height: 100vh;
}

/* Step Sidebar */
.step-sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
    box-shadow: var(--shadow-sm);
}

.step-sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
}

.step-sidebar-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
    letter-spacing: 0.3px;
}

.step-list {
    flex: 1;
    padding: var(--spacing-md);
}

.step-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.step-item:hover {
    border-color: var(--accent-blue);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.step-item.active {
    border-color: var(--step-ready);
    background: rgba(13, 110, 253, 0.05);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}

.step-item.running {
    border-color: var(--step-running);
    background: rgba(255, 193, 7, 0.1);
}

.step-item.running .step-indicator {
    animation: pulse 1.5s infinite;
}

.step-item.completed {
    border-color: var(--step-completed);
    background: rgba(25, 135, 84, 0.05);
}

.step-indicator {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 2px solid var(--step-pending);
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.step-item.active .step-indicator {
    border-color: var(--step-ready);
    background: var(--step-ready);
}

.step-item.running .step-indicator {
    border-color: var(--step-running);
    background: var(--step-running);
}

.step-item.completed .step-indicator {
    border-color: var(--step-completed);
    background: var(--step-completed);
}

.step-number {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: color var(--transition-normal);
}

.step-item.active .step-number,
.step-item.running .step-number,
.step-item.completed .step-number {
    color: #ffffff;
}

.step-item.completed .step-number::after {
    content: '✓';
    font-size: 0.875rem;
}

.step-item.completed .step-number {
    font-size: 0;
}

.step-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-normal);
}

.step-item.active .step-title {
    color: var(--accent-blue);
    font-weight: 600;
}

.step-item.running .step-title {
    color: var(--text-primary);
    font-weight: 600;
}

.step-item.completed .step-title {
    color: var(--step-completed);
}

/* Sidebar Footer */
.step-sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.run-all-btn,
.reset-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.run-all-btn {
    background: linear-gradient(135deg, #198754 0%, #157347 100%);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.run-all-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(25, 135, 84, 0.35);
}

.run-all-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

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

/* Notebook Area */
.notebook-area {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--spacing-xl);
    max-width: calc(100% - var(--sidebar-width));
    background: var(--bg-primary);
}

.notebook-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--border-light);
}

.notebook-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-blue);
    margin-bottom: var(--spacing-sm);
}

.notebook-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Parameter Selector Dropdowns */
.param-selector {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(13, 110, 253, 0.05) 0%, rgba(111, 66, 193, 0.05) 100%);
    border-bottom: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xl);
}

.param-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.param-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.param-dropdown {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 2px solid var(--accent-blue);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 100px;
}

.param-dropdown:hover {
    border-color: var(--accent-blue-dark);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}

.param-dropdown:focus {
    outline: none;
    border-color: var(--accent-blue-dark);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.25);
}

.param-dropdown.wide {
    min-width: 180px;
}

/* Notebook Cells */
.notebook-cell {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.notebook-cell:hover {
    border-color: var(--accent-blue-light);
    box-shadow: var(--shadow-md);
}

.notebook-cell.running {
    border-color: var(--step-running);
    box-shadow: 0 0 20px rgba(255, 193, 7, 0.2);
}

.notebook-cell.completed {
    border-color: var(--step-completed);
}

.cell-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
}

.cell-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.run-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent-green);
    border: none;
    border-radius: var(--radius-sm);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.run-btn:hover:not(:disabled) {
    background: #157347;
    transform: scale(1.05);
}

.run-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.run-btn.running {
    background: var(--step-running);
    color: var(--text-primary);
}

/* Code Block - Gray background */
.cell-code {
    background: #2d2d2d;
    padding: var(--spacing-lg);
    overflow-x: auto;
}

.cell-code pre {
    margin: 0;
    font-family: 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    color: #e6e6e6;
}

.cell-code code {
    font-family: inherit;
}

/* Syntax Highlighting - for dark code background */
.keyword {
    color: #c678dd;
}

.string {
    color: #98c379;
}

.number {
    color: #d19a66;
}

.comment {
    color: #7f848e;
    font-style: italic;
}

.function {
    color: #61afef;
}

.class-name {
    color: #e5c07b;
}

.builtin {
    color: #56b6c2;
}

.self {
    color: #e06c75;
}

.format {
    color: #56b6c2;
}

/* Output Area */
.cell-output {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

/* Specific styling for training cell (7th step) output */
.notebook-cell[data-cell="7"] .cell-output {
    max-height: 1200px;
    overflow-y: auto;
}

.cell-output.hidden {
    display: none;
}

.output-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.output-content {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
}

.text-output pre {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
    color: var(--text-primary);
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
}

.success-text {
    color: var(--accent-green);
    font-weight: 600;
}

/* Model Architecture */
.model-architecture {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-purple);
}

.arch-title {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.arch-layer {
    color: var(--accent-blue);
    padding-left: var(--spacing-sm);
    font-family: 'Fira Code', monospace;
}

/* Parameters Table */
.params-table {
    margin-top: var(--spacing-md);
}

.params-table table {
    width: 100%;
    max-width: 400px;
    border-collapse: collapse;
    font-size: 0.875rem;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.params-table th,
.params-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.params-table th {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-weight: 600;
}

.params-table td:last-child {
    color: var(--accent-blue);
    font-weight: 600;
}

/* Training Output */
.training-output {
    margin-bottom: var(--spacing-lg);
}

.training-output pre {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    max-height: 600px;
    overflow-y: auto;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    font-size: 0.8rem;
}

/* Epoch Section Styling */
.epoch-section {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-blue);
}

.epoch-section h4 {
    color: var(--accent-blue);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 600;
}

.epoch-section p {
    margin: var(--spacing-xs) 0;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.epoch-chart-container {
    margin-top: var(--spacing-md);
    margin-left: auto;
    margin-right: auto;
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    height: 350px;
    max-width: 600px;
    width: 100%;
}

.epoch-chart-container canvas {
    max-width: 100%;
    max-height: 100%;
}

/* Chart Container */
.chart-container {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-md);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    max-width: 900px;
    max-height: 600px;
    margin-left: auto;
    margin-right: auto;
}

.chart-container canvas {
    max-width: 100%;
    max-height: 350px;
    height: auto !important;
}

/* Test Loss */
.test-loss {
    background: linear-gradient(135deg, rgba(13, 110, 253, 0.1) 0%, rgba(111, 66, 193, 0.1) 100%);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    display: inline-flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(13, 110, 253, 0.2);
}

.loss-label {
    color: var(--text-secondary);
    font-weight: 600;
}

.loss-value {
    color: var(--accent-blue);
    font-weight: 700;
    font-size: 1.125rem;
}

/* Generated Text */
.generated-text-container {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.generated-text-header {
    background: linear-gradient(135deg, #0d6efd 0%, #6f42c1 100%);
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 600;
    color: white;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.generated-text {
    padding: var(--spacing-lg);
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-primary);
    max-height: 400px;
    overflow-y: auto;
    white-space: pre-wrap;
    background: #fffef5;
}

/* Completion Message */
.completion-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(25, 135, 84, 0.1) 0%, rgba(13, 110, 253, 0.1) 100%);
    border-radius: var(--radius-lg);
    border: 2px solid var(--step-completed);
    margin-top: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.completion-message.hidden {
    display: none;
}

.completion-icon {
    font-size: 3rem;
}

.completion-text h3 {
    color: var(--accent-green);
    margin-bottom: var(--spacing-xs);
}

.completion-text p {
    color: var(--text-secondary);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    z-index: 1000;
}

.loading-overlay.hidden {
    display: none;
}

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

.loading-text {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
}

/* Animations */
@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cell-output:not(.hidden) {
    animation: fadeIn 0.3s ease-out;
}

/* Scrollbar Styling - Light theme */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

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

/* Responsive Design */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 220px;
    }

    .notebook-header h1 {
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    .step-sidebar {
        position: fixed;
        left: -100%;
        transition: left var(--transition-normal);
        width: 100%;
        max-width: 280px;
        box-shadow: var(--shadow-lg);
    }

    .step-sidebar.open {
        left: 0;
    }

    .notebook-area {
        margin-left: 0;
        max-width: 100%;
        padding: var(--spacing-md);
    }

    /* Mobile Menu Button */
    .mobile-menu-btn {
        display: block;
        position: fixed;
        top: var(--spacing-md);
        left: var(--spacing-md);
        z-index: 101;
        background: var(--accent-blue);
        border: none;
        border-radius: var(--radius-md);
        padding: var(--spacing-sm) var(--spacing-md);
        color: white;
        cursor: pointer;
        font-weight: 600;
        box-shadow: var(--shadow-md);
    }

    .cell-header {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }

    .notebook-header h1 {
        font-size: 1.25rem;
    }

    .completion-message {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .cell-code {
        padding: var(--spacing-md);
    }

    .cell-code pre {
        font-size: 0.7rem;
    }

    .generated-text {
        font-size: 0.875rem;
    }
}

/* Print Styles */
@media print {

    .step-sidebar,
    .run-btn,
    .run-all-btn,
    .reset-btn,
    .loading-overlay {
        display: none !important;
    }

    .notebook-area {
        margin-left: 0;
        max-width: 100%;
    }

    .cell-output.hidden {
        display: block;
    }
}