/* QR Code Generator - TechTools */
/* Modern glassmorphic design with dark theme */

:root {
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --surface: rgba(255, 255, 255, 0.05);
    --surface-hover: rgba(255, 255, 255, 0.08);
    --border: rgba(255, 255, 255, 0.1);
    --border-focus: rgba(139, 92, 246, 0.5);
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #8b5cf6;
    --accent-hover: #7c3aed;
    --accent-light: rgba(139, 92, 246, 0.2);
    --success: #10b981;
    --success-light: rgba(16, 185, 129, 0.2);
    --danger: #ef4444;
    --danger-light: rgba(239, 68, 68, 0.2);
    --warning: #f59e0b;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

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

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

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.header-nav {
    display: flex;
    gap: 1rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-size: 0.9rem;
}

.nav-link:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.nav-link.current {
    background: var(--accent-light);
    color: var(--accent);
}

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

.tool-title i {
    color: var(--accent);
}

.tool-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.action-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.action-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Generator Layout */
.generator-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 2rem;
    align-items: start;
}

/* Form Panel */
.form-panel {
    background: var(--surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2rem;
}

.section-header {
    margin-bottom: 1.5rem;
}

.section-header h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.section-header h2 i {
    color: var(--accent);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Type Selector */
.type-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-lg);
}

.type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.75rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    min-width: 70px;
}

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

.type-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
    border-color: var(--accent);
}

.type-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

/* Form Groups */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group.hidden {
    display: none;
}

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

.form-group label i {
    color: var(--accent);
    font-size: 0.85rem;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-light);
}

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

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

.form-row.hidden {
    display: none;
}

/* Color Picker */
.color-picker .color-input-wrapper {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.color-picker input[type="color"] {
    width: 50px;
    height: 40px;
    padding: 2px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: transparent;
}

.color-picker input[type="text"] {
    flex: 1;
    text-transform: uppercase;
    font-family: monospace;
}

/* Range Slider */
input[type="range"] {
    width: 100%;
    height: 6px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 3px;
    appearance: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

/* Customization Section */
.customization-section,
.save-options {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.customization-section h3,
.save-options h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.customization-section h3 i,
.save-options h3 i {
    color: var(--accent);
}

/* Checkboxes */
.checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.checkbox-label:hover {
    color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkbox-label .checkmark {
    width: 20px;
    height: 20px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--accent);
    border-color: var(--accent);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '\2713';
    color: white;
    font-size: 12px;
}

.checkbox-label i {
    color: var(--accent);
}

.tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background: var(--text-muted);
    color: var(--bg-primary);
    border-radius: 50%;
    font-size: 10px;
    font-weight: 700;
    cursor: help;
}

/* Preview Panel */
.preview-panel {
    background: var(--surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    position: sticky;
    top: 100px;
}

.qr-preview-container {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    margin-bottom: 1.5rem;
}

.qr-preview .placeholder {
    text-align: center;
    color: #999;
}

.qr-preview .placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.qr-preview .placeholder p {
    font-size: 0.9rem;
}

.qr-canvas {
    display: none;
}

.qr-canvas.active {
    display: block;
}

.qr-canvas canvas,
.qr-canvas img {
    max-width: 100%;
    height: auto;
}

/* Preview Actions */
.preview-actions {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.download-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.download-btn:hover:not(:disabled) {
    background: var(--accent-hover);
}

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

.download-btn.secondary {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.download-btn.secondary:hover:not(:disabled) {
    background: var(--surface-hover);
}

.action-btn-small {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.action-btn-small:hover:not(:disabled) {
    background: var(--surface-hover);
    color: var(--text-primary);
}

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

.action-btn-small.primary {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.action-btn-small.primary:hover:not(:disabled) {
    background: #0d9668;
}

/* Success Message */
.success-message {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--success-light);
    border: 1px solid var(--success);
    border-radius: var(--radius-md);
    color: var(--success);
    font-weight: 500;
}

.success-message.hidden {
    display: none;
}

/* My Codes Section */
.my-codes-section {
    background: var(--surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2rem;
}

.my-codes-section.hidden {
    display: none;
}

.codes-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 200px;
    position: relative;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
}

.filter-buttons {
    display: flex;
    gap: 0.25rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.25rem;
    border-radius: var(--radius-md);
}

.filter-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent);
    color: white;
}

.refresh-btn {
    padding: 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.refresh-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

/* Codes Container */
.codes-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.loading-spinner {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem;
    color: var(--text-muted);
}

.loading-spinner i {
    font-size: 2rem;
    color: var(--accent);
}

/* QR Code Card */
.qr-card {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: var(--transition);
}

.qr-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.qr-card-preview {
    background: white;
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-card-preview canvas,
.qr-card-preview img {
    max-width: 100%;
    height: auto;
}

.qr-card-info h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.qr-card-info .qr-type {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    background: var(--accent-light);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.qr-card-info .qr-content {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    word-break: break-all;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.qr-card-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.qr-card-stats span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.qr-card-actions {
    display: flex;
    gap: 0.5rem;
}

.qr-card-actions button {
    flex: 1;
    padding: 0.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}

.qr-card-actions button:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.qr-card-actions button.delete:hover {
    background: var(--danger-light);
    border-color: var(--danger);
    color: var(--danger);
}

/* Empty State */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    max-width: 400px;
    width: 100%;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    color: var(--warning);
}

.modal-body {
    padding: 1.5rem;
}

.modal-body p {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.code-to-delete {
    font-weight: 600;
    color: var(--text-primary);
}

.warning-text {
    font-size: 0.85rem;
    color: var(--danger);
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

.btn {
    padding: 0.6rem 1.25rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--surface-hover);
}

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

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

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

    .preview-panel {
        position: static;
    }
}

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

    .header-content {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .tool-title {
        order: -1;
        width: 100%;
        font-size: 1.25rem;
    }

    .main-content {
        padding: 1rem;
    }

    .form-panel,
    .preview-panel,
    .my-codes-section {
        padding: 1.25rem;
    }

    .type-selector {
        gap: 0.25rem;
    }

    .type-btn {
        padding: 0.5rem 0.75rem;
        min-width: auto;
        font-size: 0.7rem;
    }

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

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

    .codes-container {
        grid-template-columns: 1fr;
    }

    .filter-buttons {
        width: 100%;
        overflow-x: auto;
    }
}