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

:root {
    --primary-color: #0066cc;
    --primary-hover: #0052a3;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    
    --bg-primary: #0a0e1a;
    --bg-secondary: #1a1f2e;
    --bg-tertiary: #242938;
    --bg-card: rgba(26, 31, 46, 0.8);
    --bg-overlay: rgba(0, 0, 0, 0.7);
    
    --text-primary: #ffffff;
    --text-secondary: #b8c1d3;
    --text-muted: #6c757d;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --border-active: rgba(0, 102, 204, 0.5);
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.25);
    --shadow-xl: 0 12px 36px rgba(0, 0, 0, 0.35);
    
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0f1419 50%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    font-feature-settings: 'kern' 1, 'liga' 1;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

.header-stats {
    display: flex;
    gap: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
}

.stat-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Main Content */
.main-content {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.video-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Video Container */
.video-container {
    position: relative;
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.video-container:hover {
    box-shadow: var(--shadow-xl), 0 0 0 1px var(--border-active);
}

#webcam {
    width: 100%;
    height: 480px;
    object-fit: cover;
    display: block;
    background: #000;
}

/* Video Overlay */
.video-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.overlay-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 1rem;
}

.recording-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-overlay);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    color: var(--danger-color);
    font-size: 0.875rem;
    font-weight: 600;
    opacity: 0;
    transition: var(--transition);
}

.recording-indicator.active {
    opacity: 1;
}

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

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

.quality-indicator {
    background: var(--bg-overlay);
    backdrop-filter: blur(10px);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--success-color);
}

/* Caption Overlay */
.caption-overlay {
    padding: 2rem;
    background: linear-gradient(
        to top,
        var(--bg-overlay) 0%,
        rgba(0, 0, 0, 0.4) 70%,
        transparent 100%
    );
    backdrop-filter: blur(10px);
}

.caption-content {
    max-width: 600px;
}

#caption-text {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    min-height: 2.1rem;
    transition: var(--transition);
}

.caption-metadata {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
}

.confidence-bar {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    overflow: hidden;
}

.confidence-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--danger-color), var(--warning-color), var(--success-color));
    border-radius: 3px;
    transition: width 0.5s ease;
    width: 0%;
}

.confidence-text {
    color: var(--text-secondary);
    font-weight: 600;
    min-width: 40px;
}

.timestamp {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Controls */
.controls-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.main-controls, .advanced-controls {
    display: flex;
    gap: 1rem;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    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, 0.1), transparent);
    transition: left 0.5s ease;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--danger-color), #b02e3c);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-active);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-icon {
    font-size: 1rem;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.metrics-panel, .history-panel, .system-panel {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
}

.metrics-panel h3, .history-panel h3, .system-panel h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.metric-item {
    text-align: center;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.metric-item:hover {
    border-color: var(--border-active);
    transform: translateY(-2px);
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* History Panel */
.history-list {
    max-height: 300px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.history-list::-webkit-scrollbar {
    width: 6px;
}

.history-list::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.history-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.history-list::-webkit-scrollbar-thumb:hover {
    background: var(--border-active);
}

.history-item {
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.history-item:hover {
    border-color: var(--border-active);
}

.history-text {
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.history-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.history-confidence {
    padding: 0.25rem 0.5rem;
    background: var(--success-color);
    color: white;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

/* System Info */
.system-info {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

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

.info-value {
    color: var(--text-primary);
    font-weight: 500;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: var(--transition);
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
    transform: translateY(-20px);
    transition: var(--transition);
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    max-height: 400px;
    overflow-y: auto;
}

.modal-body::-webkit-scrollbar {
    width: 6px;
}

.modal-body::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.modal-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--border-active);
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* Settings */
.setting-group {
    margin-bottom: 1.5rem;
}

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

.setting-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.setting-group select,
.setting-group input[type="range"] {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: var(--transition);
}

.setting-group select:focus,
.setting-group input[type="range"]:focus {
    outline: none;
    border-color: var(--border-active);
}

.setting-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

.setting-group input[type="range"] {
    /* -webkit-appearance: none; */
    height: 8px;
    border-radius: 4px;
    background: var(--bg-tertiary);
    outline: none;
}

.setting-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: var(--shadow-sm);
}

.setting-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: var(--shadow-sm);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    border-radius: 24px;
}

.toggle-slider::before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 2px;
    top: 2px;
    background: var(--text-muted);
    transition: var(--transition);
    border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(26px);
    background: white;
}

/* Status Bar */
.status-bar {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-color);
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.status-left {
    color: var(--text-primary);
    font-weight: 500;
}

.status-right {
    color: var(--text-muted);
}

.keyboard-hint {
    font-size: 0.75rem;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 300px;
    transform: translateX(400px);
    transition: var(--transition);
    pointer-events: auto;
}

.toast.show {
    transform: translateX(0);
}

.toast.hide {
    transform: translateX(400px);
    opacity: 0;
}

.toast-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.toast-message {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    font-size: 1rem;
    transition: var(--transition);
    flex-shrink: 0;
}

.toast-close:hover {
    color: var(--text-primary);
}

/* Toast Types */
.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.success .toast-icon {
    color: var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast.error .toast-icon {
    color: var(--danger-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

.toast.warning .toast-icon {
    color: var(--warning-color);
}

.toast.info {
    border-left: 4px solid var(--info-color);
}

.toast.info .toast-icon {
    color: var(--info-color);
}

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    animation: loading-shimmer 2s infinite;
}

@keyframes loading-shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Responsive Design */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr 300px;
        gap: 1.5rem;
    }
    
    .sidebar {
        gap: 1rem;
    }
    
    .metrics-panel, .history-panel, .system-panel {
        padding: 1rem;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .header-stats {
        gap: 1rem;
        width: 100%;
        justify-content: space-around;
    }
    
    .main-content {
        grid-template-columns: 1fr;
        padding: 1rem;
        gap: 1rem;
    }
    
    #webcam {
        height: 300px;
    }
    
    .controls-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .main-controls, .advanced-controls {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .caption-overlay {
        padding: 1rem;
    }
    
    #caption-text {
        font-size: 1.25rem;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .status-bar {
        padding: 0.5rem 1rem;
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .keyboard-hint {
        display: none;
    }
    
    .toast {
        min-width: 280px;
        margin: 0 1rem;
    }
    
    .modal-content {
        width: 95%;
        margin: 1rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 0.75rem;
    }
    
    .logo-section {
        gap: 0.5rem;
    }
    
    .logo-icon {
        font-size: 1.5rem;
    }
    
    .header h1 {
        font-size: 1.25rem;
    }
    
    .subtitle {
        font-size: 0.8125rem;
    }
    
    .main-content {
        padding: 0.75rem;
    }
    
    #webcam {
        height: 250px;
    }
    
    .btn {
        padding: 0.625rem 1rem;
        font-size: 0.8125rem;
    }
    
    .main-controls, .advanced-controls {
        gap: 0.75rem;
    }
    
    #caption-text {
        font-size: 1.125rem;
    }
    
    .caption-metadata {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .confidence-bar {
        width: 100%;
    }
    
    .toast {
        min-width: 260px;
    }
}

/* Dark mode enhancements */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, var(--bg-primary) 0%, #0a0d14 50%, var(--bg-secondary) 100%);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: rgba(255, 255, 255, 0.3);
        --border-active: var(--primary-color);
        --text-secondary: #d1d5db;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .recording-dot {
        animation: none;
    }
    
    .loading::after {
        animation: none;
    }
}

/* Print styles */
@media print {
    .header, .sidebar, .controls-section, .status-bar, .toast-container {
        display: none;
    }
    
    .main-content {
        grid-template-columns: 1fr;
        padding: 0;
    }
    
    .video-container {
        border: 2px solid #000;
        border-radius: 0;
        box-shadow: none;
    }
}