/* =============================================================================
   AI2Learn - Modern UI Stylesheet
   Clean Architecture CSS with Mobile-First Responsive Design
   ============================================================================= */

/* =============================================================================
   1. CSS VARIABLES (Design Tokens)
   ============================================================================= */

:root {
    /* ----- Colors ----- */
    /* Background */
    --color-bg-page: #f5f5f7;
    --color-bg-card: #ffffff;
    --color-bg-hover: #f8f9fa;
    --color-bg-input: #f1f3f4;
    --color-bg-overlay: rgba(0, 0, 0, 0.6);

    /* Primary */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #eef2ff;
    --color-primary-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);

    /* Secondary */
    --color-secondary: #64748b;
    --color-secondary-hover: #475569;

    /* Status */
    --color-success: #22c55e;
    --color-success-light: #dcfce7;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-danger: #ef4444;
    --color-danger-light: #fee2e2;

    /* Text */
    --color-text-primary: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-text-inverse: #ffffff;

    /* Border */
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    /* ----- Typography ----- */
    --font-family: 'Cairo', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;

    /* ----- Spacing ----- */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    /* ----- Border Radius ----- */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* ----- Shadows ----- */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-primary: 0 4px 14px rgba(99, 102, 241, 0.4);

    /* ----- Transitions ----- */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* ----- Layout ----- */
    --container-max: 1400px;
    --sidebar-width: 320px;
    --header-height: 70px;
}

/* =============================================================================
   2. CSS RESET & BASE STYLES
   ============================================================================= */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
    background-color: var(--color-bg-page);
    min-height: 100vh;
    direction: rtl;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img,
video {
    max-width: 100%;
    height: auto;
    display: block;
}

button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

a {
    color: inherit;
    text-decoration: none;
}

/* =============================================================================
   3. UTILITY CLASSES
   ============================================================================= */

/* Visibility */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Status States */
.status-text.ready {
    color: var(--color-success);
}

.status-text.training {
    color: var(--color-warning);
}

/* =============================================================================
   4. COMPONENT: Header
   ============================================================================= */

.header {
    background-color: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.logo {
    flex-shrink: 0;
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: scale(1.05);
}

.title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background-color: var(--color-bg-input);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-warning);
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* =============================================================================
   5. COMPONENT: Layout - Main Container
   ============================================================================= */

.main-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-6);
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--space-8);
    align-items: start;
}

/* =============================================================================
   6. COMPONENT: Classes Column
   ============================================================================= */

.classes-column {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.column-header {
    margin-bottom: var(--space-2);
}

.column-header h2 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.column-header p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.classes-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

/* =============================================================================
   7. COMPONENT: Class Card
   ============================================================================= */

.class-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.class-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.class-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
}

.class-name-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex: 1;
}

.edit-icon {
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.class-name-input {
    flex: 1;
    padding: var(--space-2) var(--space-4);
    background-color: var(--color-bg-input);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.class-name-input:hover {
    background-color: var(--color-bg-hover);
}

.class-name-input:focus {
    outline: none;
    background-color: var(--color-bg-card);
    border-color: var(--color-primary);
}

.btn-remove-class {
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.btn-remove-class:hover {
    background-color: var(--color-danger-light);
    color: var(--color-danger);
}

/* =============================================================================
   8. COMPONENT: Add Samples Section
   ============================================================================= */

.add-samples-section {
    margin-bottom: var(--space-6);
}

.section-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.sample-buttons {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.btn-sample {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    min-height: 44px;
    /* Touch target */
    background-color: var(--color-bg-input);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.btn-sample:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-sample svg {
    flex-shrink: 0;
}

/* Upload Area */
.upload-area {
    display: inline-block;
}

.file-input {
    display: none;
}

.upload-label {
    cursor: pointer;
}

/* =============================================================================
   9. COMPONENT: Images Preview
   ============================================================================= */

.images-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
    gap: var(--space-2);
    min-height: 32px;
    margin-bottom: var(--space-4);
}

.preview-image-container {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 2px solid var(--color-border);
    transition: border-color var(--transition-fast);
}

.preview-image-container:hover {
    border-color: var(--color-primary);
}

.preview-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.btn-remove-image {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background-color: var(--color-danger);
    border: none;
    border-radius: 50%;
    color: var(--color-text-inverse);
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.preview-image-container:hover .btn-remove-image {
    opacity: 1;
}

/* Image Count */
.image-count {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    background-color: var(--color-bg-input);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
}

.count-number {
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.count-label {
    color: var(--color-text-secondary);
}

/* =============================================================================
   10. COMPONENT: Add Class Button
   ============================================================================= */

.btn-add-class {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-4) var(--space-6);
    min-height: 56px;
    /* Touch target */
    background-color: var(--color-bg-card);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.btn-add-class:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* =============================================================================
   11. COMPONENT: Training Panel (Sidebar)
   ============================================================================= */

.training-panel {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    position: sticky;
    top: calc(var(--header-height) + var(--space-6));
}

.panel-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
}

.panel-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.panel-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

/* =============================================================================
   12. COMPONENT: Train Button
   ============================================================================= */

.btn-train {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    min-height: 56px;
    /* Touch target */
    background: var(--color-primary-gradient);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-primary);
    transition: all var(--transition-base);
}

.btn-train:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-train:active:not(:disabled) {
    transform: translateY(0);
}

.btn-train:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

/* =============================================================================
   13. COMPONENT: Training Progress
   ============================================================================= */

.training-progress {
    margin-top: var(--space-6);
}

.progress-bar {
    height: 8px;
    background-color: var(--color-bg-input);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary-gradient);
    width: 0%;
    transition: width var(--transition-base);
    border-radius: var(--radius-full);
}

.progress-text {
    margin-top: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: center;
}

/* =============================================================================
   14. COMPONENT: Advanced Section
   ============================================================================= */

.advanced-section {
    margin-top: var(--space-6);
    border-top: 1px solid var(--color-border-light);
    padding-top: var(--space-4);
}

.advanced-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    cursor: pointer;
    list-style: none;
    padding: var(--space-2) 0;
    transition: color var(--transition-fast);
}

.advanced-toggle:hover {
    color: var(--color-primary);
}

.advanced-toggle::-webkit-details-marker {
    display: none;
}

.advanced-toggle svg {
    transition: transform var(--transition-fast);
}

.advanced-section[open] .advanced-toggle svg {
    transform: rotate(180deg);
}

.advanced-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding-top: var(--space-4);
}

/* =============================================================================
   15. COMPONENT: Buttons (Generic)
   ============================================================================= */

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    min-height: 44px;
    /* Touch target */
    background-color: var(--color-primary);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-inverse);
    transition: all var(--transition-fast);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
}

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

.btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    min-height: 44px;
    /* Touch target */
    background-color: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-bg-hover);
    border-color: var(--color-secondary);
}

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

.btn-danger {
    color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--color-danger-light);
    border-color: var(--color-danger);
}

.export-status {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-2);
}

/* =============================================================================
   16. COMPONENT: Statistics Card
   ============================================================================= */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.stat-item {
    text-align: center;
    padding: var(--space-4);
    background-color: var(--color-bg-input);
    border-radius: var(--radius-md);
}

.stat-value {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-1);
}

.stat-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* =============================================================================
   17. COMPONENT: Prediction Section
   ============================================================================= */

.prediction-section {
    max-width: var(--container-max);
    margin: 0 auto var(--space-8);
    padding: 0 var(--space-6);
}

.section-header {
    margin-bottom: var(--space-6);
}

.section-header h2 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.section-header p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.prediction-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    box-shadow: var(--shadow-sm);
}

.prediction-modes {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.btn-mode {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    min-height: 44px;
    /* Touch target */
    background-color: var(--color-bg-input);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.btn-mode:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-mode.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-inverse);
}

/* Predict Upload Area */
.predict-upload-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 250px;
}

.predict-upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-12);
    background-color: var(--color-bg-input);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    width: 100%;
}

.predict-upload-label:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
}

.predict-upload-label svg {
    color: var(--color-text-muted);
}

.predict-upload-label span {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.predict-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin-top: var(--space-4);
}

/* Predict Webcam Area */
.predict-webcam-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    min-height: 250px;
}

.webcam-feed {
    width: 100%;
    max-height: 300px;
    border-radius: var(--radius-md);
    background-color: var(--color-bg-input);
}

.webcam-controls-inline {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    justify-content: center;
}

/* Prediction Results */
.prediction-results {
    background-color: var(--color-bg-input);
    border-radius: var(--radius-md);
    padding: var(--space-6);
}

.prediction-results h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.predictions-display {
    min-height: 150px;
}

.no-prediction {
    color: var(--color-text-muted);
    text-align: center;
    padding: var(--space-8);
    font-size: var(--font-size-sm);
}

.prediction-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    margin-bottom: var(--space-2);
    background-color: var(--color-bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.prediction-item.top {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.prediction-label {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

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

.confidence-bar {
    width: 80px;
    height: 6px;
    background-color: var(--color-border);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.confidence-fill {
    height: 100%;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

.confidence-text {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    min-width: 45px;
    text-align: left;
}

/* =============================================================================
   18. COMPONENT: Modal
   ============================================================================= */

.modal {
    position: fixed;
    inset: 0;
    background-color: var(--color-bg-overlay);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-4);
}

.modal-content {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.btn-close-modal {
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.btn-close-modal:hover {
    background-color: var(--color-bg-input);
    color: var(--color-text-primary);
}

.modal-body {
    padding: var(--space-6);
    overflow-y: auto;
}

.modal-body .webcam-feed {
    border-radius: var(--radius-md);
    background-color: var(--color-text-primary);
}

/* Auto Capture Controls */
.auto-capture-controls {
    margin-top: var(--space-4);
    padding: var(--space-4);
    background-color: var(--color-bg-input);
    border-radius: var(--radius-md);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    align-items: center;
    justify-content: space-between;
}

.auto-capture-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.auto-capture-toggle input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.auto-capture-settings {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.auto-capture-settings label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.auto-capture-settings select {
    padding: var(--space-1) var(--space-2);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    cursor: pointer;
}

.auto-capture-settings select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.modal-footer {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-input);
}

.capture-info {
    flex: 1;
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    min-width: 120px;
}

.capture-info span {
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

/* =============================================================================
   19. COMPONENT: Footer
   ============================================================================= */

.footer {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
    text-align: center;
    border-top: 1px solid var(--color-border-light);
    margin-top: var(--space-8);
}

.footer p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--space-2);
}

.footer strong {
    color: var(--color-primary);
}

.footer-brand {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.footer-brand a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    transition: color var(--transition-fast);
}

.footer-brand a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}


/* =============================================================================
   20. RESPONSIVE DESIGN (Mobile First Breakpoints)
   ============================================================================= */

/* Tablet (< 1024px) */
@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .training-panel {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .panel-card {
        flex: 1;
        min-width: 280px;
    }
}

/* Mobile Large (< 768px) */
@media (max-width: 768px) {
    :root {
        --space-6: 1rem;
        --space-8: 1.5rem;
    }

    .header-content {
        padding: var(--space-4);
    }

    .title {
        font-size: var(--font-size-xl);
    }

    .main-container {
        padding: var(--space-4);
    }

    .class-card {
        padding: var(--space-4);
    }

    .prediction-container {
        grid-template-columns: 1fr;
        padding: var(--space-6);
    }

    .prediction-section {
        padding: 0 var(--space-4);
    }

    .training-panel {
        flex-direction: column;
    }

    .panel-card {
        min-width: auto;
    }

    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .stat-item {
        padding: var(--space-2);
    }

    .stat-value {
        font-size: var(--font-size-base);
    }

    .stat-label {
        font-size: 0.625rem;
    }
}

/* Mobile Small (< 480px) */
@media (max-width: 480px) {
    .title {
        font-size: var(--font-size-lg);
    }

    .status-badge {
        padding: var(--space-1) var(--space-3);
        font-size: var(--font-size-xs);
    }

    .sample-buttons {
        flex-direction: column;
    }

    .btn-sample {
        width: 100%;
    }

    .upload-area {
        display: block;
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .prediction-modes {
        flex-direction: column;
    }

    .btn-mode {
        width: 100%;
    }

    .modal-content {
        max-height: 95vh;
    }

    .modal-footer {
        flex-direction: column;
    }

    .footer {
        padding: var(--space-6) var(--space-4);
    }
}

/* =============================================================================
   21. PRINT STYLES
   ============================================================================= */

@media print {

    .header,
    .training-panel,
    .prediction-section,
    .footer,
    .modal,
    .btn-add-class {
        display: none !important;
    }

    .main-container {
        display: block;
        padding: 0;
    }

    .class-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* =============================================================================
   22. LTR SUPPORT (Future Enhancement)
   ============================================================================= */

html[dir="ltr"] body {
    direction: ltr;
}