/* ========================================
   QR Code & Barcode Generator Pro - Styles
   ======================================== */

/* CSS Variables */
:root {
    /* Colors - Light Theme */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --accent: #f59e0b;
    --danger: #ef4444;
    
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: #334155;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo i {
    font-size: 1.75rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    gap: 0.5rem;
    background: var(--bg-tertiary);
    padding: 0.35rem;
    border-radius: var(--radius-lg);
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.nav-tab:hover {
    color: var(--text-primary);
}

.nav-tab.active {
    background: var(--bg-secondary);
    color: var(--primary);
    box-shadow: var(--shadow-md);
}

.nav-tab i {
    font-size: 1.1rem;
}

/* Theme Toggle */
.theme-toggle {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.theme-toggle:hover {
    background: var(--primary);
    color: white;
    transform: rotate(180deg);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem;
}

.generator-section {
    animation: fadeIn 0.3s ease;
}

.generator-section.hidden {
    display: none;
}

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

.content-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

/* Input Panel */
.input-panel {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.input-panel h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

/* Type Selector */
.type-selector {
    margin-bottom: 1.5rem;
}

.type-selector > label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.type-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    padding: 0.75rem 0.5rem;
    border: 2px solid var(--border-color);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    color: var(--text-secondary);
}

.type-btn i {
    font-size: 1.25rem;
}

.type-btn span {
    font-size: 0.7rem;
    font-weight: 500;
}

.type-btn:hover {
    border-color: var(--primary-light);
    background: var(--bg-secondary);
    transform: translateY(-2px);
}

.type-btn.active {
    border-color: var(--primary);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* Barcode Type Grid */
.barcode-type-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.barcode-type-btn {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    border: 2px solid var(--border-color);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: left;
}

.barcode-type-btn:hover {
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

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

.barcode-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.barcode-type-btn.active .barcode-name {
    color: white;
}

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

.barcode-type-btn.active .barcode-desc {
    color: rgba(255, 255, 255, 0.8);
}

/* Form Groups */
.form-group {
    display: none;
    margin-bottom: 1.5rem;
}

.form-group.active {
    display: block;
    animation: slideIn 0.3s ease;
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
    margin-bottom: 0.75rem;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-input::placeholder {
    color: var(--text-muted);
}

textarea.form-input {
    resize: vertical;
    min-height: 80px;
}

select.form-input {
    cursor: pointer;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.5rem 0;
}

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

.checkbox-group label {
    margin: 0;
    cursor: pointer;
}

.hint {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: -0.5rem;
}

/* Dynamic Field Sections (vCard) */
.dynamic-field-section {
    margin-bottom: 1.25rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.section-header label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.btn-add {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.75rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-add:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-add i {
    font-size: 0.7rem;
}

.dynamic-fields {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.dynamic-field-row {
    display: grid;
    grid-template-columns: 120px 1fr 36px;
    gap: 0.5rem;
    align-items: center;
    animation: slideIn 0.2s ease;
}

.dynamic-field-row .form-input {
    margin-bottom: 0;
}

.dynamic-field-row .field-type {
    padding: 0.65rem 0.5rem;
    font-size: 0.85rem;
}

.dynamic-field-row .field-value {
    padding: 0.65rem 0.75rem;
}

.btn-remove {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-remove i {
    font-size: 0.85rem;
}

/* Single field row - hide remove button */
.dynamic-fields .dynamic-field-row:only-child .btn-remove {
    opacity: 0.3;
    pointer-events: none;
}

@media (max-width: 480px) {
    .dynamic-field-row {
        grid-template-columns: 100px 1fr 32px;
    }
    
    .dynamic-field-row .field-type {
        font-size: 0.75rem;
        padding: 0.5rem 0.35rem;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

.btn-danger {
    background: var(--danger);
    color: white;
    padding: 0.5rem 0.75rem;
}

.btn-danger:hover {
    background: #dc2626;
}

.generate-btn {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    margin-top: 1rem;
}

.generate-btn i {
    font-size: 1.2rem;
}

/* Preview Panel */
.preview-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Customization Section */
.customization-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 1.25rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.customization-section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.customization-section h3 i {
    color: var(--primary);
}

/* Compact grid layout for custom groups */
.customization-section .custom-groups-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.custom-group {
    margin-bottom: 1rem;
}

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

.custom-group > label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* Color Picker - Compact */
.color-pickers-row {
    display: flex;
    gap: 1rem;
}

.color-picker-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0;
}

.color-picker {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 0;
    overflow: hidden;
}

.color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker::-webkit-color-swatch {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.color-picker-row span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Styles Row - Pattern & Corner side by side */
.styles-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.styles-row .custom-group {
    margin-bottom: 0;
}

/* Pattern Grid - Compact */
.pattern-grid {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.pattern-btn, .corner-btn {
    width: 36px;
    height: 36px;
    border: 2px solid var(--border-color);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.pattern-btn svg, .corner-btn svg {
    width: 18px;
    height: 18px;
    fill: var(--text-secondary);
}

.pattern-btn:hover, .corner-btn:hover {
    border-color: var(--primary-light);
}

.pattern-btn.active, .corner-btn.active {
    border-color: var(--primary);
    background: var(--primary);
}

.pattern-btn.active svg, .corner-btn.active svg {
    fill: white;
}

/* Logo Upload - Compact */
.logo-upload {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.upload-btn {
    flex: 1;
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
}

/* Settings Row - Size & Error Correction side by side */
.settings-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.settings-row .custom-group {
    margin-bottom: 0;
}

.settings-row .form-input {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
}

/* Frame & Text Section */
.frame-text-section {
    background: var(--bg-tertiary);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    margin-top: 0.5rem;
}

.frame-options {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.frame-grid {
    display: flex;
    gap: 0.35rem;
}

.frame-btn {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

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

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

.frame-color-row {
    display: flex;
    gap: 0.5rem;
}

.text-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.text-input-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.5rem;
}

.text-input-row .form-input {
    margin: 0;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
}

.text-input-row select {
    width: auto;
    min-width: 90px;
}

.text-style-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.text-style-row .form-input {
    margin: 0;
    padding: 0.4rem 0.5rem;
    font-size: 0.8rem;
    width: auto;
    min-width: 80px;
}

.text-style-row .color-picker-row {
    margin: 0;
}

/* Logo Section - Enhanced */
.logo-section {
    background: var(--bg-tertiary);
    padding: 0.75rem;
    border-radius: var(--radius-md);
}

.logo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-options {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.logo-source-row {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.default-logo-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--primary);
    border-radius: var(--radius-sm);
    min-width: 60px;
}

.default-logo-preview.inactive {
    border-color: var(--border-color);
    opacity: 0.5;
}

.default-logo-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 1.1rem;
}

.default-logo-preview span {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.logo-upload-area {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex: 1;
}

.logo-upload-area .upload-btn {
    flex: 1;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
}

.custom-logo-preview {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--secondary);
    border-radius: var(--radius-sm);
}

.custom-logo-preview img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    object-fit: contain;
}

.custom-logo-preview span {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.logo-size-control {
    margin-top: 0.5rem;
}

.logo-size-control label {
    font-size: 0.75rem !important;
    margin-bottom: 0.25rem !important;
}

/* Range Slider */
.range-slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(99, 102, 241, 0.4);
    transition: all var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

/* Preview Container */
.preview-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.preview-box {
    flex: 1;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.preview-box.barcode-preview {
    min-height: 200px;
}

.placeholder {
    text-align: center;
    color: var(--text-muted);
}

.placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.placeholder p {
    font-size: 0.95rem;
}

.preview-box canvas,
.preview-box svg,
.preview-box img {
    max-width: 100%;
    max-height: 100%;
    display: block;
}

/* Download Options */
.download-options {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.download-options h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.download-btns {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.btn-download {
    flex: 1;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
}

.btn-download:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.btn-download i {
    margin-right: 0.25rem;
}

.resolution-options {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.resolution-options label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.resolution-options .form-input {
    margin: 0;
    flex: 1;
}

/* Footer */
.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.footer i {
    color: var(--danger);
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.2); }
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    border-left: 4px solid var(--primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideInRight 0.3s ease;
    max-width: 350px;
}

.toast.success {
    border-left-color: var(--secondary);
}

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

.toast i {
    font-size: 1.25rem;
}

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

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

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

/* Gradient Colors Section */
.gradient-colors {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.gradient-colors .form-input {
    margin-top: 0.5rem;
    margin-bottom: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .type-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem;
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .nav-tabs {
        order: 3;
        width: 100%;
        justify-content: center;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .input-panel,
    .customization-section,
    .preview-container {
        padding: 1.25rem;
    }
    
    .type-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .barcode-type-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .download-btns {
        flex-direction: column;
    }
    
    .styles-row,
    .settings-row {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .color-pickers-row {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .type-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .preview-box {
        min-height: 250px;
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .nav-tab {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }
    
    .color-pickers-row {
        gap: 0.5rem;
    }
}

/* Loading Animation */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Smooth Scroll for inputs */
input:focus,
textarea:focus,
select:focus {
    scroll-margin-top: 100px;
}

/* Canvas container for proper centering */
#qrPreview canvas {
    display: block;
    margin: 0 auto;
}

/* QR Code specific styling */
.qr-container {
    padding: 1rem;
    background: white;
    border-radius: var(--radius-md);
    display: inline-block;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .customization-section,
    .download-options,
    .input-panel,
    .footer {
        display: none !important;
    }
    
    .preview-container {
        box-shadow: none;
        border: none;
    }
}