/* Modern CSS Variables for consistent theming */
:root {
    --primary-color: #6366f1;
    --primary-hover: #5b5ad6;
    --primary-light: #f0f0ff;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.class-card.disabled {
    opacity: 0.5;
    filter: grayscale(100%);
    transform: scale(0.98);
    transition: var(--transition);
}

* {
    box-sizing: border-box;
}

body {
    background: linear-gradient(135deg, #f0f2ff 0%, #e8f4fd 100%);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Updated Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 20px;
}

.app-title {
    color: var(--primary-color);
    font-size: 24px;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.025em;
}

.container {
    max-width: 1200px;
    margin: 16px auto;
    padding: 0 16px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    position: relative;
}

.left-column {
    display: flex;
    flex-direction: column;
    order: 1;
}

.class-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 20px;
    overflow: hidden;
    border: 1px solid var(--gray-100);
    transition: var(--transition);
    position: relative;
}

.class-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.class-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.class-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}

.class-name {
    cursor: default;
    word-break: break-word;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.025em;
}

.class-icons {
    display: flex;
    gap: 8px;
    align-items: center;
}

.edit-icon, .delete-icon {
    color: var(--gray-400);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
    font-size: 16px;
}

.edit-icon:hover {
    color: var(--primary-color);
    background: var(--primary-light);
}

.delete-icon:hover {
    color: var(--danger-color);
    background: #fef2f2;
}

.menu-dots {
    color: var(--gray-400);
    cursor: pointer;
    position: relative;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
}

.menu-dots:hover {
    color: var(--gray-600);
    background: var(--gray-100);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    display: none;
    z-index: 100;
    width: 200px;
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.dropdown-menu.show {
    display: block;
    animation: fadeInDown 0.2s ease-out;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-item {
    padding: 12px 16px;
    cursor: pointer;
    color: var(--gray-700);
    display: block;
    text-decoration: none;
    white-space: nowrap;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    border-bottom: 1px solid var(--gray-100);
}

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

.dropdown-item:hover {
    background: var(--gray-50);
    color: var(--primary-color);
}

.class-content {
    padding: 20px;
}

.samples-label {
    margin-bottom: 16px;
    color: var(--gray-600);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: -0.025em;
}

.sample-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.sample-button {
    background: linear-gradient(135deg, var(--primary-light) 0%, #f8faff 100%);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    min-height: 80px;
    justify-content: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.sample-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
    transition: left 0.5s;
}

.sample-button:hover::before {
    left: 100%;
}

.sample-button:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.sample-button:hover .sample-icon,
.sample-button:hover .sample-label {
    color: var(--white);
}

.sample-button:active {
    transform: translateY(0);
}

.sample-icon {
    color: var(--primary-color);
    font-size: 24px;
    margin-bottom: 8px;
    transition: var(--transition);
}

.sample-label {
    color: var(--primary-color);
    font-size: 13px;
    text-align: center;
    font-weight: 600;
    letter-spacing: -0.025em;
    transition: var(--transition);
}

.samples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 8px;
    margin-top: 12px;
}

.sample-image {
    width: 100%;
    height: 60px;
    object-fit: cover;
    border-radius: var(--border-radius);
    border: 2px solid var(--gray-200);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.sample-image:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.sample-image-container {
    position: relative;
    display: inline-block;
    width: 100%;
}

.sample-delete-btn {
    position: absolute;
    top: 2px;
    right: 2px;
    background: var(--danger-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 10px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.sample-delete-btn:hover {
    background: #dc2626;
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.sample-image-container:hover .sample-delete-btn {
    display: flex;
}

.add-class-btn {
    border: 2px dashed var(--gray-300);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    text-align: center;
    color: var(--gray-500);
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--white);
    width: 100%;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    min-height: 70px;
    transition: var(--transition);
    letter-spacing: -0.025em;
}

.add-class-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.add-icon {
    margin-right: 8px;
    font-size: 18px;
}

.right-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
    order: 2;
}

.training-section, .preview-section {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
    overflow: visible; /* Changed from hidden to visible to allow dropdown */
    transition: var(--transition);
    position: relative; /* Add position relative for proper dropdown positioning */
}

.preview-section {
    min-height: 550px; /* Fixed minimum height for the entire preview section */
}

.training-section:hover, .preview-section:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.section-title {
    padding: 20px 24px;
    font-weight: 700;
    color: var(--gray-800);
    font-size: 18px;
    border-bottom: 1px solid var(--gray-100);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    letter-spacing: -0.025em;
}

.train-button {
    display: block;
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border: none;
    text-align: center;
    font-weight: 600;
    color: var(--white);
    cursor: pointer;
    font-size: 16px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    letter-spacing: -0.025em;
}

.train-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.6s;
}

.train-button:hover::before {
    left: 100%;
}

.train-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.train-button:active {
    transform: translateY(0);
}

/* Enhanced mobile feedback for train button */
@media (max-width: 768px) {
    .train-button:active {
        transform: scale(0.96);
        box-shadow: var(--shadow-sm);
    }
}

.train-button:disabled {
    background: var(--gray-300);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Model Action Button Styles */
.model-action-btn {
    background: linear-gradient(135deg, var(--primary-light) 0%, #f8faff 100%);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    letter-spacing: -0.025em;
    width: 100%;
}

.model-action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
    transition: left 0.5s;
}

.model-action-btn:hover::before {
    left: 100%;
}

.model-action-btn:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
}

.model-action-btn:active {
    transform: translateY(0);
}

/* Enhanced mobile feedback for model action buttons */
@media (max-width: 768px) {
    .model-action-btn:active {
        transform: scale(0.96);
        box-shadow: var(--shadow-sm);
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        color: var(--white);
    }
    
    .model-action-btn:hover {
        transform: none; /* Disable hover effects on mobile */
    }
}

.model-action-btn:disabled {
    background: var(--gray-300);
    color: var(--gray-500);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    border-color: transparent;
}

.model-action-btn i {
    font-size: 16px;
    transition: var(--transition);
}

.training-status {
    padding: 12px 20px;
    text-align: center;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 14px;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    border-radius: var(--border-radius);
    margin: 16px 20px;
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.training-status:empty {
    opacity: 0;
    height: 0;
    padding: 0;
    margin: 0;
    border: none;
}

.advanced-dropdown {
    padding: 16px 24px;
    border-top: 1px solid var(--gray-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    color: var(--gray-600);
    position: relative;
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    background: var(--gray-50);
}

.advanced-dropdown:hover {
    background: var(--gray-100);
    color: var(--primary-color);
}

.advanced-dropdown i {
    transition: var(--transition);
    font-size: 16px;
}

.advanced-panel {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--white);
    border: 1px solid var(--gray-200);
    padding: 20px;
    z-index: 1000; /* Reduced z-index for better layering */
    box-shadow: var(--shadow-xl);
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    animation: slideDown 0.2s ease-out;
}

/* Higher z-index only on mobile where it needs to appear above preview tabs */
@media (max-width: 768px) {
    .advanced-panel {
        z-index: 10000;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.option-group {
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.option-group:last-child {
    margin-bottom: 0;
}

.option-group label {
    font-size: 14px;
    color: var(--gray-700);
    font-weight: 600;
    letter-spacing: -0.025em;
}

.option-group input {
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: 15px;
    transition: var(--transition);
    background: var(--white);
    color: var(--gray-700);
}

.option-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.preview-tabs {
    display: flex;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.preview-tab {
    padding: 16px 12px;
    flex: 1;
    text-align: center;
    background: none;
    border: none;
    font-weight: 600;
    color: var(--gray-600);
    cursor: pointer;
    font-size: 15px;
    transition: var(--transition);
    position: relative;
    letter-spacing: -0.025em;
}

.preview-tab::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px 3px 0 0;
    transform: scaleX(0);
    transition: var(--transition);
}

.preview-tab.active {
    color: var(--primary-color);
    background: var(--white);
}

.preview-tab.active::after {
    transform: scaleX(1);
}

.preview-tab:hover:not(.active) {
    color: var(--gray-700);
    background: var(--gray-100);
}

.preview-content {
    padding: 24px 20px;
    text-align: center;
    color: var(--gray-500);
    font-size: 15px;
    line-height: 1.6;
    min-height: 450px; /* Increased to accommodate canvas + content */
    height: 450px; /* Fixed height to prevent layout shifts */
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    overflow-y: auto; /* Allow scrolling if content exceeds height */
}

#preview-webcam {
    width: 280px !important;
    height: 280px !important;
    max-width: 280px;
    margin: 0 auto 20px auto;
    border-radius: var(--border-radius-lg);
    border: 3px solid var(--gray-200);
    transition: var(--transition);
    display: block;
    object-fit: cover;
}

#preview-webcam:hover {
    border-color: var(--primary-color);
}

#preview-canvas {
    width: 280px !important;
    height: 280px !important;
    max-width: 280px;
    margin: 0 auto 20px auto;
    border: 3px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
    background: var(--gray-50);
    display: block;
}

#preview-canvas.camera-disabled {
    filter: grayscale(100%);
    opacity: 0.8;
    border-color: var(--gray-300);
}

.prediction-bars {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.prediction-bar {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    font-size: 13px;
    background: var(--gray-50);
    padding: 8px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.prediction-bar:hover {
    background: var(--gray-100);
}

.prediction-bar .class-name {
    width: 80px;
    text-align: right;
    margin-right: 12px;
    font-size: 12px;
    font-weight: 600;
    word-break: break-word;
    color: var(--gray-700);
}

.bar-container {
    flex-grow: 1;
    height: 20px;
    background: var(--gray-200);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.bar {
    height: 100%;
    border-radius: 10px;
    position: relative;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.prediction-value {
    width: 50px;
    text-align: left;
    margin-left: 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-600);
}

.prediction-paused, .prediction-switching {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--gray-500);
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    background: var(--gray-50);
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-200);
}

.prediction-paused i, .prediction-switching i {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--gray-400);
}

.prediction-switching {
    color: var(--primary-color);
}

.prediction-switching i {
    color: var(--primary-color);
    animation: spin 1s linear infinite;
}

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

.class-name-edit {
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    padding: 8px 12px;
    outline: none;
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
    width: 100%;
    max-width: 250px;
    background: var(--white);
    transition: var(--transition);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.connections {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    display: none; /* Hidden on mobile by default */
}

.webcam-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(0);
    -webkit-backdrop-filter: blur(0);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.webcam-modal-content {
    background: var(--white);
    padding: 24px;
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    box-shadow: var(--shadow-xl);
    max-width: 90vw;
    max-height: 90vh;
    overflow: visible;
    position: relative;
}

/* Webcam Modal Specific Styles */
.webcam-video-container {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: var(--gray-900);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
    margin: 0;
    width: 100%;
    max-width: 560px;
}

.webcam-control-btn {
    position: absolute;
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    z-index: 1001;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.switch-camera-btn {
    bottom: 16px;
    left: 16px;
    background: rgba(0, 0, 0, 0.8);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.switch-camera-btn:hover {
    background: rgba(0, 0, 0, 0.9);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.close-btn {
    top: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.7);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-sm);
    width: 32px;
    height: 32px;
    font-size: 16px;
}

.close-btn:hover {
    background: var(--danger-color);
    color: var(--white);
    border-color: var(--danger-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.webcam-action-overlay {
    position: relative;
    margin-top: 16px;
    display: flex;
    gap: 12px;
    z-index: 1002;
}

.webcam-action-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.capture-btn {
    background: rgba(16, 185, 129, 0.8);
}

.capture-btn:hover {
    background: var(--success-color);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.record-btn {
    background: rgba(239, 68, 68, 0.8);
}

.record-btn:hover {
    background: var(--danger-color);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.record-btn.recording {
    background: var(--warning-color);
    animation: pulse 1s infinite;
    border-color: var(--warning-color);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.record-status {
    margin-top: 8px;
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.8);
    color: var(--white);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    text-align: center;
}

.record-status:empty {
    display: none;
}

/* Mobile adjustments for webcam buttons */
@media (max-width: 480px) {
    .webcam-action-overlay {
        bottom: 12px;
        gap: 8px;
    }
    
    .webcam-action-btn {
        width: 48px;
        height: 48px;
        font-size: 18px;
    }
    
    .webcam-control-btn {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }
    
    .switch-camera-btn {
        bottom: 12px;
        left: 12px;
    }
    
    .close-btn {
        top: -10px;
        right: -10px;
    }
}

/* Desktop styles - applied when screen is wider than 768px */
@media (min-width: 768px) {
    .container {
        grid-template-columns: 1fr 2fr;
        gap: 24px;
        padding: 0 24px;
        margin: 24px auto;
    }
    
    .header {
        padding: 16px 24px;
    }
    
    .logo {
        font-size: 20px;
    }
    
    .right-column {
        flex-direction: row;
        align-items: flex-start;
    }
    
    .training-section, .preview-section {
        flex: 1;
    }
    
    .class-header {
        padding: 20px 24px;
    }
    
    .class-title {
        font-size: 18px;
    }
    
    .class-content {
        padding: 24px;
    }
    
    .samples-label {
        margin-bottom: 20px;
        font-size: 16px;
    }
    
    .sample-buttons {
        display: flex;
        gap: 16px;
        margin-bottom: 24px;
    }
    
    .sample-button {
        width: 120px;
        padding: 20px 16px;
        min-height: 100px;
    }
    
    .sample-icon {
        font-size: 28px;
        margin-bottom: 8px;
    }
    
    .sample-label {
        font-size: 14px;
    }
    
    .samples-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: 12px;
        margin-top: 16px;
    }
    
    .sample-image {
        height: 80px;
    }
    
    .add-class-btn {
        padding: 24px;
        font-size: 16px;
        margin-bottom: 24px;
        min-height: 80px;
    }
    
    .section-title {
        padding: 20px 24px;
        font-size: 20px;
    }
    
    .train-button {
        padding: 18px 24px;
        font-size: 16px;
    }
    
    .training-status {
        padding: 16px 20px;
        font-size: 15px;
        margin: 20px 24px;
    }
    
    .advanced-dropdown {
        padding: 20px 24px;
        font-size: 16px;
    }
    
    .advanced-panel {
        padding: 24px;
    }
    
    .option-group {
        margin-bottom: 20px;
        flex-direction: row;
        align-items: center;
        gap: 16px;
    }
    
    .option-group label {
        margin-right: 16px;
        margin-bottom: 0;
        font-size: 15px;
        min-width: 120px;
    }
    
    .option-group input {
        padding: 12px 16px;
        font-size: 15px;
    }
    
    .preview-tab {
        padding: 18px 16px;
        font-size: 16px;
    }
    
    .preview-content {
        padding: 32px 24px;
        font-size: 16px;
    }
    
    .prediction-bar {
        margin-bottom: 16px;
        font-size: 14px;
        padding: 12px;
    }
    
    .prediction-bar .class-name {
        width: 120px;
        margin-right: 16px;
        font-size: 14px;
    }
    
    .bar-container {
        height: 24px;
        border-radius: 12px;
    }
    
    .bar {
        border-radius: 12px;
    }
    
    .prediction-value {
        width: 60px;
        margin-left: 16px;
        font-size: 14px;
    }
    
    .class-name-edit {
        font-size: 18px;
        padding: 12px 16px;
        width: auto;
        max-width: none;
    }
    
    .connections {
        display: block; /* Show connections on desktop only when side-by-side */
    }
    
    .webcam-video-container {
        max-width: 600px;
    }
}

/* Large desktop styles - ensure connections are visible on larger screens */
@media (min-width: 1200px) {
    .container {
        margin: 40px auto;
        padding: 0 32px;
    }
    
    .connections {
        display: block; /* Ensure connections are visible on large screens */
    }
    
    .class-card {
        margin-bottom: 24px;
    }
    
    .right-column {
        gap: 24px;
    }
}

/* Touch-friendly adjustments for mobile */
@media (max-width: 767px) {
    .edit-icon, .delete-icon, .menu-dots {
        padding: 12px;
        margin: -12px;
        border-radius: 8px;
    }
    
    .dropdown-item {
        padding: 16px 20px;
        font-size: 16px;
    }
    
    /* Advanced panel mobile adjustments */
    .training-section {
        overflow: visible; /* Allow overflow for dropdown */
        position: relative;
        z-index: 1000;
        margin-bottom: 20px; /* Add space after training section */
    }
    
    .advanced-panel {
        position: static; /* Make it part of normal flow */
        display: block !important; /* Always visible */
        border-radius: var(--border-radius);
        margin-top: 16px;
        animation: none;
        box-shadow: var(--shadow-md);
        z-index: auto;
        width: 100%;
        left: auto;
        right: auto;
        top: auto;
        border: 1px solid var(--gray-200);
        padding: 16px;
    }
    
    /* Hide the dropdown toggle on mobile since panel is always visible */
    .advanced-dropdown > div:first-child,
    .advanced-dropdown > i {
        display: none;
    }
    
    /* Keep the dropdown container visible but remove its styling */
    .advanced-dropdown {
        background: none;
        border: none;
        cursor: default;
        padding: 0;
    }
    
    /* Ensure proper spacing in right column */
    .right-column {
        gap: 20px; /* Reset gap to normal */
    }
    
    /* Add proper spacing for preview section */
    .preview-section {
        margin-top: 0; /* Reset margin since we have proper gap now */
    }
    
    .sample-button {
        touch-action: manipulation;
        min-height: 90px;
    }
    
    .train-button {
        touch-action: manipulation;
        padding: 18px 24px;
    }
    
    .model-action-btn {
        padding: 14px 20px;
        font-size: 16px;
    }
    
    /* Better mobile spacing */
    .container {
        margin: 12px auto;
        padding: 0 12px;
    }
    
    .class-content {
        padding: 16px;
    }
    
    .preview-content {
        padding: 20px 16px;
    }
}

/* Extra small devices */
@media (max-width: 480px) {
    .sample-buttons {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .sample-button {
        min-height: 70px;
        padding: 14px 12px;
    }
    
    .webcam-modal {
        padding: 16px;
    }
    
    .webcam-modal-content {
        padding: 16px;
    }
    
    .webcam-video-container {
        margin: 0;
        max-width: calc(100vw - 64px);
    }
}

/* Footer Styles */
.footer {
    background: var(--gray-800);
    color: var(--white);
    padding: 20px 0;
    margin-top: 40px;
    border-top: 1px solid var(--gray-200);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.partner-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    order: 1;
}

.partner-logo {
    height: 36px;
    width: auto;
    opacity: 0.7;
    transition: var(--transition);
    filter: brightness(0.9);
}

.partner-logo:hover {
    opacity: 1;
    filter: brightness(1);
}

.mdz-logo {
    background: white;
    padding: 6px 12px;
    border-radius: 8px;
}

.bil-logo {
    height: 44px !important;
}

.footer-link {
    color: var(--gray-300);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--white);
    text-decoration: underline;
}

.footer-credit {
    font-size: 12px;
    color: var(--gray-400);
}

.credit-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.credit-link:hover {
    text-decoration: underline;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
}

.close {
    color: var(--white);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
    transition: var(--transition);
}

.close:hover {
    opacity: 0.7;
}

.modal-body {
    padding: 24px;
    max-height: 60vh;
    overflow-y: auto;
    line-height: 1.6;
}

.modal-body h3 {
    color: var(--gray-800);
    font-size: 18px;
    font-weight: 600;
    margin: 24px 0 12px 0;
}

.modal-body h3:first-child {
    margin-top: 0;
}

.modal-body h4 {
    color: var(--gray-700);
    font-size: 16px;
    font-weight: 600;
    margin: 20px 0 8px 0;
}

.modal-body p {
    color: var(--gray-600);
    margin: 0 0 16px 0;
}

/* Camera Controls and 3-State Switch */
.camera-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding: 20px;
}

.preview-mode-selector {
    display: flex;
    background: var(--gray-100);
    border-radius: var(--border-radius);
    padding: 4px;
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.preview-mode-option {
    flex: 1;
    padding: 12px 20px;
    text-align: center;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-600);
    background: transparent;
    border: none;
    border-radius: calc(var(--border-radius) - 4px);
    transition: var(--transition);
    position: relative;
    z-index: 2;
    min-width: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.preview-mode-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.5s;
}

.preview-mode-option:hover::before {
    left: 100%;
}

.preview-mode-option:hover {
    color: var(--gray-800);
    transform: translateY(-1px);
}

.preview-mode-option.active {
    color: var(--primary-color);
    background: var(--white);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--primary-color);
}

.preview-mode-option.active::before {
    display: none;
}

.preview-mode-option i {
    font-size: 16px;
}

.preview-content-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    min-height: 250px;
    width: 100%;
}

.preview-video-container {
    position: relative;
    display: inline-block;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 2px solid var(--gray-200);
    transition: var(--transition);
    background: var(--gray-50);
}

.preview-video-container.active {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

#preview-webcam {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
}

#preview-canvas {
    display: none;
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
}

.preview-upload-area {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    border: 2px dashed var(--gray-300);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    width: 100%;
    max-width: 400px;
}

.preview-upload-area:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 100%);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.preview-upload-area.active {
    display: flex;
}

.preview-upload-icon {
    font-size: 48px;
    color: var(--gray-400);
    margin-bottom: 15px;
    transition: var(--transition);
}

.preview-upload-area:hover .preview-upload-icon {
    color: var(--primary-color);
    transform: scale(1.1);
}

.preview-upload-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
    transition: var(--transition);
}

.preview-upload-subtext {
    font-size: 14px;
    color: var(--gray-500);
    transition: var(--transition);
}

.preview-upload-area:hover .preview-upload-text {
    color: var(--primary-color);
}

.preview-upload-area:hover .preview-upload-subtext {
    color: var(--primary-hover);
}

.preview-off-state {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    color: var(--gray-500);
    text-align: center;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    border: 1px solid var(--gray-200);
}

.preview-off-state.active {
    display: flex;
}

.preview-off-icon {
    font-size: 64px;
    color: var(--gray-300);
    margin-bottom: 20px;
}

.preview-off-text {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--gray-600);
}

.preview-off-subtext {
    font-size: 14px;
    color: var(--gray-500);
}

.preview-uploaded-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--border-radius);
    border: 2px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.preview-uploaded-image:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.uploaded-image-actions {
    margin-top: 15px;
    display: flex;
    gap: 10px;
    align-items: center;
}

.clear-image-btn {
    padding: 8px 16px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    transition: var(--transition);
}

.clear-image-btn:hover {
    background: #dc2626;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.switch-camera-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    font-size: 16px;
    backdrop-filter: blur(10px);
}

.switch-camera-btn:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.switch-camera-btn:active {
    transform: scale(0.95);
}

.preview-mode-content {
    display: none;
    width: 100%;
}

.preview-mode-content.active {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Challenge Tab Specific Styles */
#challengeContent {
    padding: 24px 20px; /* Match the preview-content padding */
    height: 450px; /* Fixed height to match other tabs */
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    overflow-y: auto; /* Allow scrolling if content exceeds height */
}

#challengeContent h5 {
    color: var(--gray-800);
    font-weight: 600;
    margin-bottom: 15px;
    font-size: 16px;
}

#challengeContent input[type="text"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 14px;
    background: var(--white);
    color: var(--gray-700);
    transition: var(--transition);
    font-family: inherit;
}

#challengeContent input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: var(--white);
}

#challengeContent input[type="text"]::placeholder {
    color: var(--gray-400);
}

#challengeContent label {
    display: block;
    font-weight: 500;
    color: var(--gray-700);
    font-size: 14px;
    margin-bottom: 5px;
}

#challengeStatus {
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid transparent;
    background: var(--gray-50);
    transition: var(--transition);
}

#challengeStatus[style*="color: rgb(239, 68, 68)"] {
    background: #fef2f2;
    border-color: #fecaca;
}

#challengeStatus[style*="color: rgb(40, 167, 69)"] {
    background: #f0fdf4;
    border-color: #bbf7d0;
}

#submitChallengeBtn {
    width: 100%;
    justify-content: center;
    margin-top: 10px;
}

#submitChallengeBtn.submitted {
    background: var(--success-color) !important;
    color: white !important;
    opacity: 0.8;
    cursor: not-allowed;
}

#submitChallengeBtn.submitted:hover {
    background: var(--success-color) !important;
    opacity: 0.8;
}

#submitChallengeBtn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}