/* ===== CSS VARIABLES ===== */
:root {
    /* Color Palette */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Neutral Colors */
    --white: #ffffff;
    --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;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #0f172a;
    
    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-white: #ffffff;
    
    /* Shadows */
    --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);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* 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;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== APP CONTAINER ===== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
}

.app-container::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.2) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ===== DARK MODE ===== */
.app-container.dark-mode {
    --primary-color: #818cf8;
    --primary-dark: #6366f1;
    --primary-light: #a5b4fc;
    --secondary-color: #34d399;
    --accent-color: #fbbf24;
    --danger-color: #f87171;

    --white: #18181b;
    --gray-50: #27272a;
    --gray-100: #27272a;
    --gray-200: #3f3f46;
    --gray-300: #52525b;
    --gray-400: #a1a1aa;
    --gray-500: #d4d4d8;
    --gray-600: #e4e4e7;
    --gray-700: #f4f4f5;
    --gray-800: #fafafa;
    --gray-900: #fff;

    --bg-primary: #18181b;
    --bg-secondary: #23232b;
    --bg-tertiary: #23232b;
    --bg-dark: #09090b;

    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --text-white: #fff;
}

.app-container.dark-mode,
.app-container.dark-mode body {
    background: linear-gradient(135deg, #23232b 0%, #18181b 100%) !important;
}

.app-container.dark-mode .app-header,
.app-container.dark-mode .app-footer,
.app-container.dark-mode .info-panel,
.app-container.dark-mode .camera-panel,
.app-container.dark-mode .predictions-panel,
.app-container.dark-mode .gestures-section {
    background: rgba(24, 24, 27, 0.98) !important;
    border-color: rgba(63, 63, 70, 0.5) !important;
    box-shadow: 0 4px 32px 0 rgba(0,0,0,0.5);
}

.app-container.dark-mode .panel-header {
    background: linear-gradient(135deg, #23232b, #6366f1);
    color: #fff;
}

.app-container.dark-mode .feature-card,
.app-container.dark-mode .gesture-card,
.app-container.dark-mode .prediction-card {
    background: #23232b !important;
    border-color: #3f3f46 !important;
    color: #f4f4f5 !important;
}

.app-container.dark-mode .placeholder-image,
.app-container.dark-mode .placeholder-prediction-content .placeholder-icon {
    background: linear-gradient(135deg, #23232b, #18181b) !important;
    color: #a1a1aa !important;
}

.app-container.dark-mode .btn,
.app-container.dark-mode .btn-primary,
.app-container.dark-mode .btn-secondary,
.app-container.dark-mode .btn-stop {
    color: #fff !important;
}

.app-container.dark-mode .btn {
    background: #23232b !important;
    border: 1px solid #3f3f46 !important;
}

.app-container.dark-mode .btn-primary {
    background: linear-gradient(135deg, #6366f1, #23232b) !important;
}

.app-container.dark-mode .btn-secondary {
    background: linear-gradient(135deg, #fbbf24, #23232b) !important;
}

.app-container.dark-mode .btn-stop {
    background: linear-gradient(135deg, #f87171, #23232b) !important;
}

.app-container.dark-mode .status-indicator {
    background: rgba(52, 211, 153, 0.08) !important;
    border-color: rgba(52, 211, 153, 0.2) !important;
    color: #34d399 !important;
}

.app-container.dark-mode .spinner {
    border: 4px solid #23232b;
    border-top: 4px solid #6366f1;
}

.app-container.dark-mode .accuracy-indicator {
    background: #3f3f46 !important;
}

.app-container.dark-mode .accuracy-line {
    background: linear-gradient(90deg, #6366f1, #34d399) !important;
}

/* Dark mode toggle button */
.dark-mode-toggle {
    background: none;
    border: none;
    outline: none;
    cursor: pointer;
    margin-left: 1.5rem;
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: color 0.2s;
    padding: 0.25rem 0.5rem;
    border-radius: 50%;
    position: relative;
    z-index: 10;
}
.dark-mode-toggle:hover {
    color: var(--accent-color);
    background: rgba(99,102,241,0.08);
}
.app-container.dark-mode .dark-mode-toggle {
    color: #fbbf24;
}
.app-container.dark-mode .dark-mode-toggle:hover {
    color: #fff;
    background: rgba(251,191,36,0.08);
}

/* ===== HEADER ===== */
.app-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding: var(--space-4) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-xl);
    box-shadow: var(--shadow-lg);
}

.logo-text {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-lg);
    color: var(--secondary-color);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    padding: var(--space-8) var(--space-6);
    position: relative;
    z-index: 1;
}

.content-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.5fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-16);
}

/* ===== PANELS ===== */
.info-panel,
.camera-panel,
.predictions-panel {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    transition: var(--transition-normal);
}

.info-panel:hover,
.camera-panel:hover,
.predictions-panel:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl), 0 0 40px rgba(99, 102, 241, 0.1);
}

.panel-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    padding: var(--space-6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.panel-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.panel-title i {
    font-size: var(--font-size-lg);
    opacity: 0.9;
}

.panel-content {
    padding: var(--space-6);
}

/* ===== INFO PANEL ===== */
.description {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.7;
    margin-bottom: var(--space-8);
}

.features-grid {
    display: grid;
    gap: var(--space-4);
}

.feature-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: var(--transition-normal);
}

.feature-card:hover {
    background: var(--white);
    border-color: var(--primary-color);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.feature-content h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.feature-content p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===== CAMERA PANEL ===== */
.camera-container {
    padding: var(--space-6);
}

.camera-viewport {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--bg-secondary);
    border: 2px solid var(--gray-200);
    margin-bottom: var(--space-6);
}

.placeholder-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    position: relative;
    overflow: hidden;
}

.placeholder-content {
    text-align: center;
    color: var(--text-secondary);
    z-index: 2;
}

.placeholder-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    color: var(--white);
    font-size: var(--font-size-3xl);
    box-shadow: var(--shadow-lg);
}

.placeholder-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.placeholder-content p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.webcam-container {
    width: 100%;
    height: 100%;
    position: relative;
    display: none;
}

.webcam-container.active {
    display: block;
}

.webcam-container canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-xl);
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
    pointer-events: none;
    border-radius: var(--radius-xl);
}

.loading-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.loading-content {
    text-align: center;
    color: var(--text-secondary);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-4);
}

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

.loading-progress {
    width: 200px;
    height: 4px;
    background: var(--gray-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-top: var(--space-4);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-sm);
    animation: progress 2s ease-in-out infinite;
}

@keyframes progress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

.control-panel {
    display: flex;
    justify-content: center;
}

.button-group {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-normal);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
}

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

.btn-secondary {
    background: linear-gradient(135deg, var(--accent-color), #f97316);
    color: var(--white);
}

.btn-stop {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: var(--white);
}

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

.btn i {
    font-size: var(--font-size-lg);
}

/* ===== PREDICTIONS PANEL ===== */
.predictions-container {
    padding: var(--space-4);
    height: auto;
    min-height: 200px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.prediction-panel {
    height: auto;
    min-height: 140px;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    box-shadow: none;
    padding: 0;
}

.predictions-content {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    overflow: visible;
}

.label-container {
    display: flex;
    flex-direction: row;
    gap: var(--space-3);
    width: 100%;
    justify-content: center;
    align-items: stretch;
    flex-wrap: wrap;
}

.prediction-card {
    min-width: 160px;
    max-width: 200px;
    flex: 1 1 160px;
    padding: var(--space-4);
    margin: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.prediction-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    transform-origin: left;
}

.prediction-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.prediction-card:hover::before {
    transform: scaleX(1);
}

.prediction-name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-3);
    text-align: center;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.prediction-probability {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    width: 100%;
}

.probability-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.probability-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--primary-color);
    text-shadow: 0 2px 4px rgba(99, 102, 241, 0.2);
}

.accuracy-indicator {
    width: 100%;
    height: 12px;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.accuracy-line {
    height: 100%;
    background: linear-gradient(90deg, 
        var(--primary-color) 0%, 
        var(--primary-light) 25%, 
        var(--secondary-color) 50%, 
        var(--accent-color) 75%, 
        var(--primary-color) 100%);
    border-radius: var(--radius-lg);
    transition: width var(--transition-normal);
    position: relative;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.accuracy-line::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.4) 50%, 
        transparent 100%);
    animation: shimmer 2s infinite;
    border-radius: var(--radius-lg);
}

.accuracy-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.2) 0%, 
        transparent 50%, 
        rgba(255, 255, 255, 0.2) 100%);
    border-radius: var(--radius-lg);
}

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

/* Dark mode adjustments for prediction cards */
.app-container.dark-mode .prediction-card {
    background: var(--bg-secondary);
    border-color: var(--gray-300);
    color: var(--text-primary);
}

.app-container.dark-mode .prediction-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(99, 102, 241, 0.2);
}

.app-container.dark-mode .accuracy-indicator {
    background: var(--gray-300);
}

.app-container.dark-mode .accuracy-line {
    background: linear-gradient(90deg, 
        var(--primary-color) 0%, 
        var(--primary-light) 25%, 
        var(--secondary-color) 50%, 
        var(--accent-color) 75%, 
        var(--primary-color) 100%);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.placeholder-predictions {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.placeholder-prediction-content {
    text-align: center;
}

.placeholder-prediction-content .placeholder-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--gray-300), var(--gray-400));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    color: var(--gray-600);
    font-size: var(--font-size-2xl);
}

.placeholder-prediction-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.placeholder-prediction-content p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===== GESTURES SECTION ===== */
.gestures-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-2xl);
    padding: var(--space-8);
    margin-top: var(--space-8);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
}

.section-title i {
    color: var(--primary-color);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.gestures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.gesture-card {
    background: var(--white);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    text-align: center;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.gesture-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.gesture-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    color: var(--white);
    font-size: var(--font-size-2xl);
    box-shadow: var(--shadow-lg);
}

.gesture-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.gesture-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===== FOOTER ===== */
.app-footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding: var(--space-6) 0;
    margin-top: auto;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ===== UTILITY CLASSES ===== */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1200px) {
    .content-wrapper {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .info-panel,
    .camera-panel,
    .predictions-panel {
        max-width: 800px;
        margin: 0 auto;
    }
    
    .gestures-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }

    .label-container {
        gap: var(--space-2);
    }
    
    .prediction-card {
        min-width: 140px;
        max-width: 180px;
        flex: 1 1 140px;
        padding: var(--space-3);
    }
    
    .prediction-name {
        font-size: var(--font-size-base);
    }
    
    .probability-value {
        font-size: var(--font-size-xl);
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: var(--space-4);
    }
    
    .header-content {
        padding: 0 var(--space-4);
    }
    
    .logo-text {
        font-size: var(--font-size-xl);
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-lg);
    }
    
    .panel-header {
        padding: var(--space-4);
    }
    
    .panel-content,
    .camera-container,
    .predictions-container {
        padding: var(--space-4);
    }
    
    .button-group {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .gestures-section {
        padding: var(--space-6);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .gestures-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--space-4);
    }
    
    .gesture-card {
        padding: var(--space-4);
    }
    
    .gesture-icon {
        width: 48px;
        height: 48px;
        font-size: var(--font-size-xl);
    }
}

@media (max-width: 480px) {
    .content-wrapper {
        gap: var(--space-4);
    }
    
    .panel-header {
        padding: var(--space-3);
    }
    
    .panel-content,
    .camera-container,
    .predictions-container {
        padding: var(--space-3);
    }
    
    .feature-card {
        flex-direction: column;
        text-align: center;
        gap: var(--space-3);
    }
    
    .gestures-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: var(--font-size-xl);
        flex-direction: column;
        gap: var(--space-2);
    }
}

@media (max-width: 900px) {
    .label-container {
        flex-direction: column;
        gap: var(--space-3);
        align-items: center;
    }
    
    .predictions-content {
        flex-direction: column;
    }
    
    .prediction-panel {
        flex-direction: column;
    }
    
    .prediction-card {
        min-width: 200px;
        max-width: 300px;
        flex: none;
    }
}

@media (max-width: 600px) {
    .predictions-container {
        padding: var(--space-2);
    }
    
    .label-container {
        flex-direction: column;
        gap: var(--space-2);
    }
    
    .prediction-card {
        min-width: 120px;
        max-width: 100%;
        font-size: var(--font-size-xs);
        padding: var(--space-3);
    }
    
    .prediction-name {
        font-size: var(--font-size-sm);
    }
    
    .probability-value {
        font-size: var(--font-size-lg);
    }
    
    .accuracy-indicator {
        height: 8px;
    }
    
    .predictions-content {
        overflow-x: auto;
        padding-bottom: var(--space-2);
    }
}