/* ============================================
   QR Code Generator Pro - Main Styles
   ============================================ */

:root {
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #1f2937;
    --light: #f8fafc;
    --gray: #6b7280;
    --border: #e5e7eb;
    --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --radius: 1.5rem;
    --radius-sm: 0.8rem;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 2rem 1rem;
    transition: background var(--transition);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* ============================================
   Header
   ============================================ */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1.5rem;
    border-radius: 60px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.logo i {
    font-size: 1.5rem;
    color: white;
}

.logo span {
    font-size: 1.2rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.5px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.session-badge {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1.2rem;
    border-radius: 60px;
    color: white;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.session-badge i {
    margin-right: 0.3rem;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    color: white;
    cursor: pointer;
    font-size: 1rem;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.05);
}

/* ============================================
   Hero
   ============================================ */
.hero {
    text-align: center;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    color: white;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

.hero .subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
}

.hero .subtitle strong {
    color: white;
    font-weight: 700;
}

/* ============================================
   Main Card
   ============================================ */
.main-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: 1fr 350px;
    transition: background var(--transition), color var(--transition);
}

/* Left Panel - Tools */
.options-panel {
    padding: 2rem;
    background: #f8fafc;
    border-right: 1px solid var(--border);
    transition: background var(--transition);
    max-height: 90vh;
    overflow-y: auto;
}

.options-panel::-webkit-scrollbar {
    width: 4px;
}

.options-panel::-webkit-scrollbar-track {
    background: transparent;
}

.options-panel::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

/* ============================================
   Global Toggle Switch - Header
   ============================================ */
.header-toggle {
    display: flex;
    align-items: center;
}

.toggle-switch.toggle-sm {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.75rem;
    user-select: none;
    color: rgba(255, 255, 255, 0.9);
}

.toggle-switch.toggle-sm input {
    display: none;
}

.toggle-switch.toggle-sm .toggle-slider {
    position: relative;
    width: 32px;
    height: 18px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    transition: all 0.3s ease;
    flex-shrink: 0;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.toggle-switch.toggle-sm .toggle-slider::before {
    content: '';
    position: absolute;
    top: 1px;
    left: 1px;
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.toggle-switch.toggle-sm input:checked + .toggle-slider {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-color: transparent;
}

.toggle-switch.toggle-sm input:checked + .toggle-slider::before {
    transform: translateX(14px);
}

.toggle-switch.toggle-sm .toggle-label {
    display: flex;
    align-items: center;
    gap: 3px;
    font-weight: 500;
}

.toggle-switch.toggle-sm .toggle-label i {
    font-size: 0.7rem;
}

/* Dark mode for header toggle */
body.dark-mode .toggle-switch.toggle-sm {
    color: rgba(255, 255, 255, 0.9);
}

body.dark-mode .toggle-switch.toggle-sm .toggle-slider {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.1);
}

/* ============================================
   Sanitize Status Indicator - i text felt
   ============================================ */
.input-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 6px;
    flex-wrap: wrap;
    padding: 6px 0;
}

.sanitize-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.65rem;
    padding: 2px 10px;
    border-radius: 12px;
    background: #10b981;
    color: white;
    font-weight: 500;
}

.sanitize-status-badge.off {
    background: #6b7280;
}

.sanitize-status-badge i {
    font-size: 0.6rem;
}

.dark-mode .sanitize-status-badge.off {
    background: #4b5563;
}

/* ============================================
   Type Selector
   ============================================ */
.type-categories {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 1.5rem;
}

.category-group {
    margin-bottom: 4px;
}

.category-label {
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--gray);
    margin-bottom: 4px;
    font-weight: 600;
}

.category-label i {
    margin-right: 4px;
}

.type-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
}

.type-btn {
    flex: 1;
    min-width: 70px;
    padding: 0.5rem 0.6rem;
    border: 1px solid var(--border);
    background: white;
    border-radius: 0.8rem;
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.75rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    color: var(--gray);
}

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

.type-btn:hover {
    border-color: var(--primary);
    background: #f0f0ff;
    color: var(--dark);
}

.type-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* ============================================
   Input Groups
   ============================================ */
.input-group {
    margin-bottom: 1rem;
}

.input-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    color: var(--dark);
}

.input-group label i {
    margin-right: 0.3rem;
    color: var(--primary);
}

.input-group input,
.input-group textarea,
.input-group select {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: inherit;
    transition: all var(--transition);
    background: white;
    color: var(--dark);
}

.input-group input:focus,
.input-group textarea:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.input-group textarea {
    resize: vertical;
    min-height: 60px;
}

.input-hint {
    font-size: 0.7rem;
    color: var(--gray);
    margin-top: 0.2rem;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem;
}

.dynamic-fields {
    transition: all var(--transition);
}

.field-group {
    display: none;
}

.field-group.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.char-counter {
    font-weight: 400;
    font-size: 0.7rem;
    color: var(--gray);
    float: right;
}

/* ============================================
   Style Section
   ============================================ */
.style-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.style-header {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
    font-weight: 600;
    color: var(--dark);
    transition: color var(--transition);
    user-select: none;
}

.style-header:hover {
    color: var(--primary);
}

.style-body {
    padding-top: 1rem;
    transition: all var(--transition);
}

.style-body.collapsed {
    display: none;
}

.color-row {
    display: flex;
    gap: 0.8rem;
    align-items: center;
    margin-bottom: 0.8rem;
}

.color-input {
    flex: 1;
}

.color-input label {
    font-size: 0.7rem;
    margin-bottom: 0.2rem;
    display: block;
    font-weight: 500;
    color: var(--gray);
}

.color-input input[type="color"] {
    width: 100%;
    height: 42px;
    padding: 0.2rem;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--border);
    cursor: pointer;
    background: white;
}

.style-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 0.8rem;
}

.style-control label {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--gray);
    display: block;
    margin-bottom: 0.2rem;
}

.style-control select {
    width: 100%;
    padding: 0.5rem 0.8rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-family: inherit;
    background: white;
    color: var(--dark);
    cursor: pointer;
}

.style-control input[type="file"] {
    width: 100%;
    padding: 4px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    background: white;
}

.size-control {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.size-control input[type="range"] {
    flex: 1;
    height: 4px;
    border-radius: 4px;
    background: var(--border);
    -webkit-appearance: none;
    appearance: none;
}

.size-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.size-control input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 2px solid white;
}

.size-control span {
    font-size: 0.8rem;
    color: var(--gray);
    min-width: 45px;
    font-weight: 500;
}

.style-checkbox-row {
    display: flex;
    gap: 16px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.style-checkbox-row label {
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    color: var(--dark);
}

.style-checkbox-row input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* ============================================
   Generate Button
   ============================================ */
.generate-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

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

.shortcut-hint {
    font-size: 0.65rem;
    font-weight: 400;
    opacity: 0.5;
    margin-left: 4px;
}

/* ============================================
   Batch Section
   ============================================ */
.batch-section {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.batch-header {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
    font-weight: 600;
    color: var(--dark);
    transition: color var(--transition);
    user-select: none;
}

.batch-header:hover {
    color: var(--primary);
}

.batch-body {
    padding-top: 0.8rem;
}

.batch-body.collapsed {
    display: none;
}

.batch-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: 0.6rem 1.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    margin-top: 0.5rem;
}

.batch-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
}

.batch-results {
    margin-top: 1rem;
    max-height: 300px;
    overflow-y: auto;
}

/* ============================================
   Preview Panel - Forenklet
   ============================================ */
.preview-panel {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: white;
    transition: background var(--transition);
    text-align: center;
}

.preview-info {
    max-width: 100%;
}

.preview-icon i {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.preview-info h3 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.preview-info p {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.preview-features {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 1.5rem;
}

.preview-features span {
    font-size: 0.8rem;
    color: var(--gray);
}

.preview-features span i {
    color: var(--success);
    margin-right: 6px;
}

.mini-preview {
    background: #f9fafb;
    border-radius: var(--radius-sm);
    padding: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 140px;
}

#mini-qrcode {
    display: flex;
    justify-content: center;
    align-items: center;
}

#mini-qrcode img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   Features
   ============================================ */
.features {
    margin-top: 3rem;
    background: white;
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    transition: background var(--transition);
}

.features h3 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--dark);
}

.features h3 i {
    margin-right: 0.5rem;
    color: var(--primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.feature i {
    font-size: 2rem;
    color: var(--primary);
}

.feature span {
    font-size: 0.8rem;
    color: var(--gray);
    font-weight: 500;
}

/* ============================================
   Footer
   ============================================ */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    margin-top: 2rem;
    font-size: 0.85rem;
    transition: color var(--transition);
}

.back-link:hover {
    color: white;
}

.footer {
    text-align: center;
    margin-top: 2rem;
    padding: 1rem;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
}

.footer a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

.footer a:hover {
    color: white;
}

.footer-links {
    margin-top: 0.5rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

/* ============================================
   QR Popup
   ============================================ */
.qr-popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: popupFadeIn 0.3s ease;
}

.qr-popup-overlay.active {
    display: flex;
}

@keyframes popupFadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.qr-popup {
    background: white;
    border-radius: 24px;
    max-width: 1200px;
    width: 100%;
    max-height: 95vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 50px 100px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

/* Popup Header */
.popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 8px;
}

.popup-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
}

.popup-type-badge {
    font-size: 0.6rem;
    padding: 2px 12px;
    border-radius: 20px;
    background: var(--primary);
    color: white;
    font-weight: 500;
}

.popup-actions {
    display: flex;
    gap: 6px;
}

.popup-btn {
    background: #f3f4f6;
    border: none;
    border-radius: 8px;
    padding: 6px 12px;
    cursor: pointer;
    color: var(--gray);
    transition: all 0.2s;
    font-size: 0.9rem;
}

.popup-btn:hover {
    background: #e5e7eb;
    color: var(--dark);
}

.popup-close {
    background: #fee2e2;
    color: var(--danger);
}

.popup-close:hover {
    background: #fecaca;
}

/* Popup Body */
.popup-body {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 0;
    flex: 1;
    min-height: 400px;
    overflow: hidden;
}

.popup-qr-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
    background: #fafafa;
    min-height: 400px;
}

.popup-qr-container {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    min-height: 350px;
}

.popup-qr-container img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.popup-loading,
.popup-placeholder,
.popup-error {
    text-align: center;
    padding: 40px;
    color: var(--gray);
}

.popup-loading i,
.popup-placeholder i,
.popup-error i {
    font-size: 3rem;
    display: block;
    margin-bottom: 16px;
}

.popup-loading i {
    color: var(--primary);
}

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

/* Popup Sidebar */
.popup-sidebar {
    padding: 24px;
    background: #f8fafc;
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow-y: auto;
}

.popup-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.popup-stat {
    background: white;
    padding: 10px 14px;
    border-radius: 10px;
    text-align: center;
}

.popup-stat .stat-label {
    font-size: 0.6rem;
    text-transform: uppercase;
    color: var(--gray);
    letter-spacing: 0.5px;
    display: block;
}

.popup-stat .stat-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--dark);
    display: block;
    margin-top: 2px;
}

.popup-download h4,
.popup-tips h4 {
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--gray);
}

.popup-download-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.popup-download-btn {
    padding: 8px 12px;
    border: none;
    border-radius: 8px;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.popup-download-btn:hover {
    transform: translateY(-2px);
}

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

.popup-download-btn.svg {
    background: var(--gray);
    color: white;
}

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

.popup-download-btn.eps {
    background: #8b5cf6;
    color: white;
}

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

.popup-tips ul {
    list-style: none;
    padding: 0;
    font-size: 0.75rem;
    color: var(--gray);
}

.popup-tips ul li {
    padding: 4px 0;
    padding-left: 20px;
    position: relative;
}

.popup-tips ul li::before {
    content: '›';
    position: absolute;
    left: 4px;
    color: var(--primary);
    font-weight: bold;
}

/* Popup Footer */
.popup-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    border-top: 1px solid var(--border);
    font-size: 0.7rem;
    color: var(--gray);
    flex-wrap: wrap;
    gap: 8px;
}

.popup-footer strong {
    color: var(--primary);
}

/* ============================================
   Notification Toast
   ============================================ */
.notification-toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 500;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    z-index: 10000;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .main-card {
        grid-template-columns: 1fr;
    }

    .options-panel {
        border-right: none;
        border-bottom: 1px solid var(--border);
        max-height: none;
        overflow-y: visible;
    }

    .preview-panel {
        padding: 1.5rem;
    }

    .popup-body {
        grid-template-columns: 1fr;
    }

    .popup-sidebar {
        border-left: none;
        border-top: 1px solid var(--border);
        max-height: 300px;
    }
}

@media (max-width: 768px) {
    body {
        padding: 1rem 0.5rem;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero .subtitle {
        font-size: 0.9rem;
    }

    .type-btn {
        min-width: 55px;
        padding: 0.4rem 0.4rem;
        font-size: 0.65rem;
    }

    .type-btn span {
        display: none;
    }

    .type-btn i {
        margin: 0;
        font-size: 1rem;
    }

    .options-panel {
        padding: 1.2rem;
    }

    .preview-panel {
        padding: 1.2rem;
    }

    .input-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .color-row {
        flex-direction: column;
        gap: 0.5rem;
    }

    .style-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .logo {
        justify-content: center;
    }

    .header-actions {
        justify-content: center;
    }

    .qr-popup {
        max-height: 98vh;
        border-radius: 16px;
    }

    .popup-qr-wrapper {
        padding: 16px;
        min-height: 250px;
    }

    .popup-download-buttons {
        grid-template-columns: 1fr 1fr 1fr;
    }

    .popup-header {
        padding: 12px 16px;
    }

    .popup-sidebar {
        padding: 16px;
    }

    .popup-info {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 400px) {
    .hero h1 {
        font-size: 1.4rem;
    }

    .features-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.8rem;
    }

    .feature i {
        font-size: 1.5rem;
    }

    .feature span {
        font-size: 0.7rem;
    }

    .popup-download-buttons {
        grid-template-columns: 1fr 1fr;
    }

    .popup-footer {
        flex-direction: column;
        text-align: center;
    }
}

/* ============================================
   Dark Mode Overrides
   ============================================ */
body.dark-mode {
    background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 100%);
}

body.dark-mode .main-card {
    background: #1f2937;
}

body.dark-mode .options-panel {
    background: #111827;
    border-color: #374151;
}

body.dark-mode .preview-panel {
    background: #1f2937;
}

body.dark-mode .input-group label {
    color: #e5e7eb;
}

body.dark-mode .input-group input,
body.dark-mode .input-group textarea,
body.dark-mode .input-group select {
    background: #1f2937;
    color: #e5e7eb;
    border-color: #374151;
}

body.dark-mode .input-group input:focus,
body.dark-mode .input-group textarea:focus {
    border-color: var(--primary);
}

body.dark-mode .type-btn {
    background: #1f2937;
    color: #9ca3af;
    border-color: #374151;
}

body.dark-mode .type-btn:hover {
    background: #374151;
    color: #e5e7eb;
}

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

body.dark-mode .style-section,
body.dark-mode .batch-section {
    border-color: #374151;
}

body.dark-mode .style-header,
body.dark-mode .batch-header {
    color: #e5e7eb;
}

body.dark-mode .style-header:hover,
body.dark-mode .batch-header:hover {
    color: var(--primary);
}

body.dark-mode .style-checkbox-row label {
    color: #e5e7eb;
}

body.dark-mode .features {
    background: #1f2937;
}

body.dark-mode .features h3 {
    color: #e5e7eb;
}

body.dark-mode .feature span {
    color: #9ca3af;
}

body.dark-mode .category-label {
    color: #6b7280;
}

body.dark-mode .style-control select {
    background: #1f2937;
    color: #e5e7eb;
    border-color: #374151;
}

body.dark-mode .color-input input[type="color"] {
    background: #1f2937;
    border-color: #374151;
}

body.dark-mode .size-control span {
    color: #9ca3af;
}

body.dark-mode .input-hint {
    color: #6b7280;
}

body.dark-mode .char-counter {
    color: #6b7280;
}

body.dark-mode .mini-preview {
    background: #111827;
}

body.dark-mode .preview-info h3 {
    color: #e5e7eb;
}

body.dark-mode .preview-info p {
    color: #9ca3af;
}

body.dark-mode .preview-features span {
    color: #9ca3af;
}

/* Dark Mode - Popup */
body.dark-mode .qr-popup {
    background: #1f2937;
    color: #e5e7eb;
}

body.dark-mode .popup-header {
    border-color: #374151;
}

body.dark-mode .popup-title {
    color: #e5e7eb;
}

body.dark-mode .popup-btn {
    background: #374151;
    color: #9ca3af;
}

body.dark-mode .popup-btn:hover {
    background: #4b5563;
    color: #e5e7eb;
}

body.dark-mode .popup-qr-wrapper {
    background: #111827;
}

body.dark-mode .popup-sidebar {
    background: #111827;
    border-color: #374151;
}

body.dark-mode .popup-stat {
    background: #1f2937;
}

body.dark-mode .popup-stat .stat-value {
    color: #e5e7eb;
}

body.dark-mode .popup-download h4,
body.dark-mode .popup-tips h4 {
    color: #9ca3af;
}

body.dark-mode .popup-tips ul {
    color: #9ca3af;
}

body.dark-mode .popup-footer {
    border-color: #374151;
    color: #6b7280;
}

body.dark-mode .popup-footer strong {
    color: var(--primary);
}

body.dark-mode .qr-popup-overlay {
    background: rgba(0, 0, 0, 0.85);
}