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

:root {
    /* Color Palette */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #06b6d4;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* 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);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 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;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--gray-800);
    line-height: 1.6;
}

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

/* Navigation */
.navbar {
    background: var(--white);
    padding: var(--space-4) var(--space-6);
    box-shadow: var(--shadow-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.brand-icon {
    font-size: 1.5rem;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--primary-color);
    color: var(--white);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-brand h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
}

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

.nav-btn {
    background: var(--gray-100);
    color: var(--gray-700);
    border: none;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* Standardize emoji icon sizes in nav buttons */
.nav-btn::first-letter {
    font-size: 1rem;
    line-height: 1;
}

.nav-btn:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.nav-btn.nav-btn-primary {
    background: var(--primary-500);
    color: white;
}

.nav-btn.nav-btn-primary:hover {
    background: var(--primary-600);
    color: white;
}

.nav-btn.nav-btn-primary:disabled {
    background: var(--gray-300);
    color: var(--gray-500);
    cursor: not-allowed;
}

.status-indicator {
    background: var(--success-color);
    color: var(--white);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--space-6);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    gap: var(--space-6);
    grid-template-columns: 1fr;
}

/* Desktop Layout - Two Column Grid */
@media (min-width: 1024px) {
    .main-content {
        grid-template-columns: 2fr 1fr;
        gap: var(--space-8);
        align-items: start;
    }
    
    .scanner-card {
        grid-column: 1;
        grid-row: 1;
    }
    
    .inventory-card {
        grid-column: 2;
        grid-row: 1 / 3;
    }
    
    .export-card {
        grid-column: 1;
        grid-row: 2;
    }
    
    .session-card {
        grid-column: 1;
        grid-row: 2;
    }
    
    /* Create a proper sub-grid for the bottom row */
    .export-card {
        grid-column: 1;
        grid-row: 2;
    }
    
    .session-card {
        grid-column: 1;
        grid-row: 2;
    }
    
    /* Desktop layout for bottom row cards - Fixed */
    .export-card,
    .session-card {
        display: block;
        width: 100%;
        margin: 0;
        box-sizing: border-box;
    }
    
    /* Create a flex container for the bottom row */
    .main-content {
        display: grid;
        grid-template-columns: 2fr 1fr;
        gap: var(--space-8);
        align-items: start;
    }
    
    /* Session card full width */
    .session-card {
        grid-column: 1;
        grid-row: 2;
    }
    
}

/* Cards */
.scanner-card,
.input-card,
.inventory-card,
.session-card,
.export-card,
.stats-card,
.files-card,
.sessions-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.card-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.card-actions {
    display: flex;
    gap: var(--space-4);
    align-items: center;
    flex-wrap: nowrap;
}

/* Camera Section */
.camera-container {
    position: relative;
    width: 100%;
    height: 300px;
    background: var(--gray-900);
    overflow: hidden;
}

#overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

/* Desktop Camera Optimization */
@media (min-width: 1024px) {
    .camera-container {
        height: 400px;
    }
    
    .scanner-row {
        padding: var(--space-6);
        gap: var(--space-8);
    }
    
    .input-group {
        gap: var(--space-6);
    }
    
    .input-group .input-field {
        min-width: 250px;
        max-width: 350px;
    }
}

#video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.camera-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    background: var(--gray-900);
}

.placeholder-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
}

.camera-placeholder p {
    font-size: 1.125rem;
    font-weight: 500;
}

.scan-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scan-frame {
    width: 250px;
    height: 150px;
    position: relative;
}

.corner {
    position: absolute;
    width: 30px;
    height: 30px;
    border: 3px solid var(--success-color);
}

.top-left {
    top: 0;
    left: 0;
    border-right: none;
    border-bottom: none;
}

.top-right {
    top: 0;
    right: 0;
    border-left: none;
    border-bottom: none;
}

.bottom-left {
    bottom: 0;
    left: 0;
    border-right: none;
    border-top: none;
}

.bottom-right {
    bottom: 0;
    right: 0;
    border-left: none;
    border-top: none;
}

.camera-controls {
    padding: var(--space-6);
    display: flex;
    gap: var(--space-4);
    justify-content: center;
}

/* Scanner Row - Horizontal Layout */
.scanner-row {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    margin-top: var(--space-2);
    padding: var(--space-3);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    flex-wrap: nowrap;
}

/* Scanner Info and Type Indicator */
.scanner-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    flex-shrink: 0;
}

.scanner-type-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--info-color);
    color: var(--white);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.scanner-type-icon {
    font-size: 1rem;
}

.scanner-type-text {
    white-space: nowrap;
}

/* ML Kit Active Indicator */
.scanner-type-indicator.mlkit {
    background: var(--success-color);
}

/* ZXing Fallback Indicator */
.scanner-type-indicator.zxing {
    background: var(--warning-color);
}

.camera-tab-container {
    display: flex;
    gap: var(--space-4);
    align-items: center;
    flex-shrink: 0;
    justify-content: center;
}

.camera-tab {
    padding: var(--space-2) var(--space-4);
    background: var(--gray-200);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    color: var(--gray-600);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-user-select: none;
    user-select: none;
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.camera-tab:hover {
    background: var(--gray-300);
    border-color: var(--gray-400);
    color: var(--gray-700);
}

.camera-tab.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
    box-shadow: 0 2px 4px rgba(0, 123, 255, 0.2);
}

.camera-tab.active:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

.camera-tab:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.camera-tab:disabled:hover {
    background: var(--gray-200);
    border-color: var(--gray-300);
    color: var(--gray-600);
}

.camera-settings {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-top: var(--space-1);
    padding-top: var(--space-1);
}

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

/* Toggle Switch */
.toggle-switch {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    cursor: pointer;
    -webkit-user-select: none;
    user-select: none;
}

.toggle-switch input {
    display: none;
}

.slider {
    width: 44px;
    height: 24px;
    background: var(--gray-300);
    border-radius: 24px;
    position: relative;
    transition: all 0.3s;
}

.slider:before {
    content: "";
    position: absolute;
    width: 18px;
    height: 18px;
    background: var(--white);
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: all 0.3s;
}

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

.toggle-switch input:checked + .slider:before {
    transform: translateX(20px);
}

.label {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* Input Section */
.input-group {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}



.input-field label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
}

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

.input-wrapper input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all 0.2s;
    background: var(--white);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(99 102 241 / 0.1);
}

.input-wrapper input:read-only {
    background: var(--gray-50);
    color: var(--gray-600);
}

.input-action {
    background: var(--gray-200);
    color: var(--gray-600);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.input-action:hover {
    background: var(--gray-300);
    color: var(--gray-700);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-3) var(--space-4);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-300);
    color: var(--gray-800);
}

.btn-success {
    background: var(--success-color);
    color: var(--white);
}

.btn-success:hover:not(:disabled) {
    background: #059669;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-warning {
    background: var(--warning-color);
    color: var(--white);
}

.btn-warning:hover:not(:disabled) {
    background: #d97706;
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-info {
    background: var(--info-color);
    color: var(--white);
}

.btn-info:hover:not(:disabled) {
    background: #0891b2;
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-small {
    padding: var(--space-2) var(--space-3);
    font-size: 0.75rem;
}

/* Inventory Section */
.inventory-list {
    max-height: 300px;
    overflow-y: auto;
    padding: var(--space-4);
}

.inventory-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    border-left: 4px solid var(--primary-color);
    transition: all 0.2s;
}

.inventory-item:hover {
    background: var(--gray-100);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.inventory-item .item-info {
    flex: 1;
}

.inventory-item .barcode {
    font-weight: 600;
    color: var(--gray-800);
    font-family: monospace;
}

.inventory-item .quantity {
    color: var(--gray-600);
    font-size: 0.875rem;
}

.inventory-item .time {
    color: var(--gray-500);
    font-size: 0.75rem;
}

.remove-item {
    background: var(--danger-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.remove-item:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* Session Section */
.session-info {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.session-label {
    font-size: 0.875rem;
    color: var(--gray-600);
}

.session-name {
    font-family: monospace;
    font-size: 0.875rem;
    color: var(--primary-color);
    font-weight: 500;
}

.session-controls {
    padding: var(--space-6);
    display: flex;
    gap: var(--space-4);
    justify-content: center;
}


/* Statistics Section */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-4);
    padding: var(--space-6);
}

.stat-item {
    text-align: center;
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--space-1);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* Files Section */
.files-list {
    max-height: 400px;
    overflow-y: auto;
    padding: var(--space-4);
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-3);
    border-left: 4px solid var(--success-color);
    transition: all 0.2s;
}

.file-item:hover {
    background: var(--gray-100);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 600;
    color: var(--gray-800);
    font-family: monospace;
    font-size: 0.875rem;
}

.file-details {
    color: var(--gray-600);
    font-size: 0.75rem;
    margin-top: var(--space-1);
}

.file-actions {
    display: flex;
    gap: var(--space-2);
}

.file-view,
.file-download,
.file-delete {
    background: none;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    cursor: pointer;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.file-view {
    background: var(--warning-color);
    color: var(--white);
}

.file-view:hover {
    background: #d97706;
    transform: scale(1.1);
}

.file-download {
    background: var(--info-color);
    color: var(--white);
}

.file-download:hover {
    background: #0891b2;
    transform: scale(1.1);
}

.file-delete {
    background: var(--danger-color);
    color: var(--white);
}

.file-delete:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* Sessions Section */
.sessions-list {
    max-height: 300px;
    overflow-y: auto;
    padding: var(--space-4);
}

.session-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-3);
    border-left: 4px solid var(--info-color);
    cursor: pointer;
    transition: all 0.2s;
}

.session-item:hover {
    background: var(--gray-100);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.session-info {
    flex: 1;
}

.session-id {
    font-weight: 600;
    color: var(--gray-800);
    font-family: monospace;
    font-size: 0.875rem;
}

.session-details {
    color: var(--gray-600);
    font-size: 0.75rem;
    margin-top: var(--space-1);
}

.session-actions {
    display: flex;
    gap: var(--space-2);
}

.session-load,
.session-delete {
    background: none;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    cursor: pointer;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.session-load {
    background: var(--success-color);
    color: var(--white);
}

.session-load:hover {
    background: #059669;
    transform: scale(1.1);
}

.session-delete {
    background: var(--danger-color);
    color: var(--white);
}

.session-delete:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: var(--space-8);
    color: var(--gray-500);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--space-2);
    color: var(--gray-600);
}

.empty-state small {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    padding: 0;
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease-out;
}

.modal-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: var(--gray-800);
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-400);
    cursor: pointer;
    padding: var(--space-1);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.modal-close:hover {
    color: var(--gray-600);
    background: var(--gray-100);
}

.modal-body {
    padding: var(--space-6);
    max-height: 400px;
    overflow-y: auto;
}

/* Export filename section */
.export-filename-section {
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--gray-200);
}

.export-filename-section label {
    display: block;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--space-2);
}

.filename-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    padding: var(--space-2);
    transition: border-color 0.2s ease;
}

.filename-input-wrapper:focus-within {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.filename-input-wrapper input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 14px;
    color: var(--gray-700);
    background: transparent;
}

.filename-extension {
    color: var(--gray-500);
    font-size: 14px;
    font-weight: 500;
    margin-left: var(--space-2);
}

.filename-help {
    display: block;
    color: var(--gray-500);
    font-size: 12px;
    margin-top: var(--space-2);
}

.export-preview-section {
    margin-top: var(--space-4);
}

.export-preview-section h4 {
    margin: 0 0 var(--space-3) 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
}

#previewContent {
    background: var(--gray-50);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    font-family: monospace;
    white-space: pre-wrap;
    word-break: break-all;
    border: 1px solid var(--gray-200);
    font-size: 0.875rem;
    line-height: 1.5;
}

.modal-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--gray-200);
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
}

/* Animations */
@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

@keyframes successPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.success-animation {
    animation: successPulse 0.5s ease-in-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        padding: var(--space-4);
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .navbar {
        padding: var(--space-3) var(--space-4);
        position: fixed;
        bottom: 0;
        top: auto;
        left: 0;
        right: 0;
        border-top: 1px solid var(--gray-200);
        border-bottom: none;
        z-index: 1000;
    }
    
    /* Hide status indicator on mobile */
    .status-indicator {
        display: none;
    }
    
    /* Add bottom padding to main content to account for fixed navbar */
    .main-content {
        padding-bottom: calc(var(--space-6) + 80px);
    }
    
    .nav-brand h1 {
        display: none; /* Hide "Eyoyo" text on mobile */
    }
    
    /* Improve mobile navbar appearance */
    .nav-actions {
        gap: var(--space-3);
    }
    
    .nav-btn {
        padding: var(--space-2) var(--space-3);
        font-size: 0.875rem;
        border-radius: var(--radius-md);
        background: var(--gray-100);
        border: 1px solid var(--gray-200);
        color: var(--gray-700);
    }
    
    .nav-btn::first-letter {
        font-size: 1rem;
        line-height: 1;
    }
    
    .nav-btn:hover {
        background: var(--gray-200);
    }
    
    .nav-btn.nav-btn-primary {
        background: var(--primary-500);
        color: white !important;
        border-color: var(--primary-500);
    }
    
    .nav-btn.nav-btn-primary:hover {
        background: var(--primary-600);
        color: white !important;
    }
    
    .nav-btn.nav-btn-primary:disabled {
        background: var(--gray-300);
        color: var(--gray-500) !important;
        border-color: var(--gray-300);
    }
    
    .card-header {
        padding: var(--space-4);
        flex-direction: column;
        gap: var(--space-3);
        align-items: flex-start;
    }
    
    .camera-container {
        height: 300px;
        margin-bottom: var(--space-4);
    }
    
    .scan-frame {
        width: 200px;
        height: 120px;
    }
    
    .camera-controls {
        padding: var(--space-4);
        flex-direction: column;
        margin-bottom: var(--space-4);
    }
    
    /* Make camera tabs larger on mobile for better touch interaction */
    .camera-tab {
        padding: var(--space-3) var(--space-5);
        font-size: 1rem;
        min-height: 44px;
    }
    
    .input-group {
        padding: var(--space-4);
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .scanner-row {
        flex-direction: column;
        gap: var(--space-3);
        align-items: center;
    }
    
    .input-group .input-field {
        width: 100%;
        max-width: none;
    }
    
    .input-wrapper {
        flex-direction: row;
        gap: var(--space-2);
        width: 100%;
        align-items: stretch;
    }
    
    .input-wrapper input {
        flex: 1;
        min-width: 0;
    }
    
    .input-wrapper .btn {
        flex-shrink: 0;
        min-width: 80px;
        padding: var(--space-3) var(--space-4);
        font-size: 1rem;
        font-weight: 600;
    }
    
    .input-wrapper input {
        flex: 1;
        min-width: 0;
        font-size: 16px; /* Prevent zoom on iOS */
        padding: var(--space-3) var(--space-3);
        border-radius: var(--radius-md);
    }
    
    /* Specific improvements for barcode input on mobile */
    #barcodeInput {
        font-family: monospace;
        letter-spacing: 0.5px;
        font-weight: 500;
        text-transform: uppercase;
    }
    
    /* Specific improvements for quantity input on mobile */
    #quantityInput {
        text-align: center;
        font-weight: 600;
    }
    
    /* Show input group on mobile but make it more compact */
    .input-group {
        display: flex;
        flex-direction: column;
        gap: var(--space-3);
        padding: var(--space-3);
    }
    
    .input-wrapper button {
        flex-shrink: 0;
    }
    
    .session-controls {
        padding: var(--space-4);
        flex-direction: row;
        gap: var(--space-3);
        justify-content: center;
    }
    
    /* Add more spacing to individual cards on mobile */
    .session-card {
        margin-bottom: var(--space-8);
    }
    
}

/* Additional spacing for tablet screens (769px - 1023px) */
@media (min-width: 769px) and (max-width: 1023px) {
    .session-card {
        margin-bottom: var(--space-10);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: var(--space-4);
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--space-4);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-actions {
        gap: var(--space-2);
    }
    
    .nav-btn {
        padding: var(--space-1) var(--space-2);
        font-size: 0.75rem;
        color: var(--gray-700);
        min-width: 60px;
    }
    
    .nav-btn::first-letter {
        font-size: 0.875rem;
        line-height: 1;
    }
    
    .nav-btn.nav-btn-primary {
        background: var(--primary-500);
        color: white !important;
    }
    
    .nav-btn.nav-btn-primary:disabled {
        background: var(--gray-300);
        color: var(--gray-500) !important;
    }
}

/* Ensure card actions stay on same line for screens > 320px */
@media (min-width: 321px) {
    .card-actions {
        flex-direction: row;
        flex-wrap: nowrap;
    }
    
    .card-header {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

/* Handle very small screens (≤320px) */
@media (max-width: 320px) {
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
    
    .card-actions {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
    }
}

/* USB Scanner Mode Styles */
.input-mode-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.usb-scanner-info {
    margin-top: var(--space-4);
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.info-box {
    display: flex;
    gap: var(--space-3);
    align-items: flex-start;
}

.info-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.info-content h4 {
    margin: 0 0 var(--space-2) 0;
    color: var(--gray-800);
    font-size: 1rem;
    font-weight: 600;
}

.info-content p {
    margin: 0 0 var(--space-2) 0;
    color: var(--gray-600);
    font-size: 0.875rem;
    line-height: 1.5;
}

.info-content small {
    color: var(--gray-500);
    font-size: 0.75rem;
    font-style: italic;
}

/* Scan Popup Modal Styles */
.scan-popup .scan-info {
    background: var(--gray-50);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    border: 1px solid var(--gray-200);
}

.scan-popup .scan-info p {
    margin: 0;
    font-size: 1.1rem;
    color: var(--gray-700);
}

.scan-popup .scan-info strong {
    color: var(--gray-900);
}

.scan-popup .quantity-input-group {
    margin-top: var(--space-4);
    padding: var(--space-4);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
}

.scan-popup .quantity-input-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 600;
    color: var(--gray-700);
}

.scan-popup .quantity-input-group input {
    width: 100%;
    padding: var(--space-3);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    text-align: center;
}

.scan-popup .quantity-input-group input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.scan-popup .quantity-controls {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.scan-popup .quantity-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--gray-300);
    background: var(--white);
    border-radius: var(--radius-md);
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.scan-popup .quantity-btn:hover {
    background: var(--gray-50);
    border-color: var(--primary-500);
}

.scan-popup .quantity-btn:active {
    background: var(--primary-100);
    transform: scale(0.95);
}

.scan-popup .quantity-minus {
    color: var(--red-600);
}

.scan-popup .quantity-plus {
    color: var(--green-600);
}

.scan-popup .quantity-input-group input {
    flex: 1;
    text-align: center;
    font-weight: 600;
}

.scan-popup .modal-content {
    max-width: 500px;
    width: 90vw;
    max-height: 80vh;
    margin: 10vh auto;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.scan-popup-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    flex: 1;
    overflow: hidden;
}

/* Full screen modal body */
.scan-popup .modal-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-4);
    max-height: none;
    min-height: 0; /* Important for flex scrolling */
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
}

/* Quantity actions for scan popup */
.scan-popup .quantity-actions {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-4);
    padding-top: var(--space-3);
    border-top: 1px solid var(--gray-200);
}

.scan-popup .quantity-actions .btn {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
    font-weight: 600;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Full screen modal header */
.scan-popup .modal-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--gray-200);
    flex-shrink: 0;
}


/* Enhanced close button for full screen */
.scan-popup .modal-close {
    font-size: 2rem;
    padding: var(--space-2);
    background: var(--gray-100);
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.scan-popup .modal-close:hover {
    background: var(--gray-200);
    transform: scale(1.1);
}

/* Ensure proper scrolling behavior */
.scan-popup .modal {
    overflow: hidden;
}

.scan-popup .modal-content {
    position: relative;
}

/* Fix for mobile scrolling */
@media (max-width: 768px) {
    .scan-popup .modal-body {
        padding: var(--space-3);
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
        padding-bottom: calc(var(--space-3) + 20px); /* Extra space for mobile nav */
    }
    
    .scan-popup .quantity-actions {
        display: flex !important;
        gap: var(--space-3);
        margin-top: var(--space-4);
        padding: var(--space-3);
        border-top: 1px solid var(--gray-200);
    }
    
    .scan-popup .quantity-actions .btn {
        flex: 1;
        padding: var(--space-3) var(--space-3);
        font-size: 1rem;
        font-weight: 600;
        min-height: 52px;
    }
}

/* Add right padding for screens below 388px */
@media (max-width: 388px) {
    .main-content {
        padding-right: var(--space-4);
    }
    
    .scan-popup .modal-body {
        padding-bottom: calc(var(--space-3) + 30px); /* Extra space for very small screens */
    }
    
    .scan-popup .quantity-actions {
        display: flex !important;
        gap: var(--space-2);
        margin-top: var(--space-3);
        padding: var(--space-2);
        border-top: 1px solid var(--gray-200);
    }
    
    .scan-popup .quantity-actions .btn {
        flex: 1;
        padding: var(--space-2) var(--space-2);
        font-size: 0.875rem;
        font-weight: 600;
        min-height: 48px;
    }
}

.barcode-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.barcode-label {
    font-weight: 600;
    color: var(--gray-700);
    min-width: 80px;
}

.barcode-value {
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--gray-800);
    font-weight: 500;
}

.stock-info-popup {
    padding: var(--space-3);
    background: var(--blue-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--blue-200);
}

.stock-details-popup {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.stock-label-popup {
    font-size: 1.2rem;
}

.stock-name-popup {
    font-weight: 500;
    color: var(--blue-800);
}

/* Stock Info Styles */
.stock-info {
    margin-top: var(--space-2);
    padding: var(--space-3);
    background: var(--blue-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--blue-200);
}

.stock-details {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
}

.stock-label {
    font-size: 1.2rem;
    margin-top: 2px;
}

.stock-info-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.stock-id {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-600);
    background: var(--gray-100);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    display: inline-block;
    width: fit-content;
}

.stock-name {
    font-weight: 500;
    color: var(--gray-800);
    font-size: 1rem;
}

/* Popup Stock Info Content */
.stock-info-content-popup {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.stock-id-popup {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-600);
    background: var(--gray-100);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    display: inline-block;
    width: fit-content;
}

.quantity-input-popup {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.quantity-input-popup label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
}

/* Batch and Expiry Date Inputs */
.batch-expiry-inputs {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-top: var(--space-2);
}

.input-field-popup {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.input-field-popup label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.input-field-popup input {
    width: 100%;
    padding: var(--space-3);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    background: var(--white);
}

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

.input-field-popup input[type="date"] {
    cursor: pointer;
}

.input-field-popup input::placeholder {
    color: var(--gray-400);
    font-style: italic;
}

/* Inventory item batch and expiry date styles */
.batch-no {
    font-size: 0.8rem;
    color: var(--info-color);
    font-weight: 500;
    margin-top: var(--space-1);
}

.expire-date {
    font-size: 0.8rem;
    color: var(--warning-color);
    font-weight: 500;
    margin-top: var(--space-1);
}

.quantity-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.quantity-btn {
    padding: var(--space-3) var(--space-4);
    background: var(--gray-100);
    border: none;
    color: var(--gray-700);
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    min-width: 44px;
}

.quantity-btn:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.quantity-btn:active {
    background: var(--gray-300);
}

.quantity-wrapper input {
    flex: 1;
    border: none;
    padding: var(--space-3);
    text-align: center;
    font-size: 1.1rem;
    font-weight: 500;
    background: transparent;
    min-width: 0;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.quantity-wrapper input:focus {
    outline: none;
    background: var(--blue-50);
}

/* Mobile responsive for popup */
@media (max-width: 768px) {
    .scan-popup .modal-content {
        width: 100vw;
        height: 100vh;
        margin: 0;
        border-radius: 0;
        max-height: 100vh;
    }
    
    .quantity-wrapper {
        width: 100%;
    }
    
    .quantity-btn {
        padding: var(--space-4);
        min-width: 50px;
    }
    
    .quantity-wrapper input {
        font-size: 1.2rem;
        padding: var(--space-4);
    }
}

/* Desktop Sidebar Optimization */
@media (min-width: 1024px) {
    .inventory-card,
    .session-card {
        height: fit-content;
        max-height: 770px;
    }
    
    .inventory-list {
        max-height: 660px;
        overflow-y: auto;
    }
    
    .session-controls {
        flex-direction: row;
        gap: var(--space-3);
    }
    
    .session-controls .btn {
        flex: 1;
        justify-content: center;
    }
    
}

/* Quantity badge styles */
.quantity-badge {
    color: #000000 !important; /* Black text for light mode */
}

.quantity-badge.clickable:hover {
    background-color: #c8e6c9 !important;
    transform: scale(1.05);
}

.quantity-badge.clickable:active {
    background-color: #a5d6a7 !important;
    transform: scale(0.95);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .quantity-badge {
        color: #ffffff !important; /* White text for dark mode */
    }
    
    .quantity-badge.clickable {
        background-color: #2e7d32 !important; /* Darker green for dark mode */
        border-color: #4caf50 !important;
    }
    
    .quantity-badge.clickable:hover {
        background-color: #388e3c !important; /* Darker green hover for dark mode */
    }
    
    .quantity-badge.clickable:active {
        background-color: #1b5e20 !important; /* Even darker green for active state */
    }
}