/* CodeCraft128 - Industrial Design System */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    /* Core palette - warm industrial */
    --bg-primary: #0d0f12;
    --bg-secondary: #14171c;
    --bg-tertiary: #1a1e25;
    --bg-elevated: #21262e;
    
    --surface-1: #282d36;
    --surface-2: #323842;
    --surface-3: #3d444f;
    
    --text-primary: #e8e6e3;
    --text-secondary: #9da3ae;
    --text-muted: #6b7280;
    
    /* Accent - warm amber */
    --accent-primary: #f59e0b;
    --accent-secondary: #d97706;
    --accent-tertiary: #b45309;
    --accent-glow: rgba(245, 158, 11, 0.15);
    --accent-glow-strong: rgba(245, 158, 11, 0.3);
    
    /* Semantic colors */
    --success: #22c55e;
    --success-muted: rgba(34, 197, 94, 0.15);
    --error: #ef4444;
    --error-muted: rgba(239, 68, 68, 0.15);
    --warning: #eab308;
    --warning-muted: rgba(234, 179, 8, 0.15);
    --info: #3b82f6;
    --info-muted: rgba(59, 130, 246, 0.15);
    
    /* Borders */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.15);
    --border-accent: var(--accent-primary);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 30px var(--accent-glow);
    
    /* Typography */
    --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', monospace;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    
    /* Radii */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 10px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    
    /* Subtle geometric pattern */
    background-image: 
        linear-gradient(135deg, transparent 74%, rgba(245, 158, 11, 0.02) 74%, rgba(245, 158, 11, 0.02) 76%, transparent 76%),
        linear-gradient(-45deg, transparent 74%, rgba(245, 158, 11, 0.02) 74%, rgba(245, 158, 11, 0.02) 76%, transparent 76%),
        radial-gradient(ellipse at top, rgba(245, 158, 11, 0.05) 0%, transparent 60%);
    background-size: 60px 60px, 60px 60px, 100% 100%;
}

/* Container */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* Header */
header {
    padding: var(--space-xl) 0;
    margin-bottom: var(--space-lg);
}

h1 {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--text-primary);
}

h1::before {
    content: '';
    width: 4px;
    height: 28px;
    background: var(--accent-primary);
    border-radius: 2px;
}

/* Input Section */
.input-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.input-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0.5;
}

.form-group {
    margin-bottom: var(--space-lg);
}

label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

/* Input Mode Toggle */
.input-mode-toggle {
    display: flex;
    gap: 2px;
    background: var(--bg-tertiary);
    padding: 3px;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    width: fit-content;
}

.mode-btn {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    color: var(--text-muted);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-btn:hover {
    color: var(--text-secondary);
    background: var(--surface-1);
}

.mode-btn.active {
    background: var(--accent-primary);
    color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
}

.mode-btn:focus {
    outline: none;
}

.mode-btn:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Text Inputs */
input[type="text"],
textarea {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

input[type="text"]::placeholder,
textarea::placeholder {
    color: var(--text-muted);
    font-style: italic;
}

textarea {
    min-height: 140px;
    resize: vertical;
    line-height: 1.5;
}

input[type="text"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-elevated);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

input[type="text"].error,
textarea.error {
    border-color: var(--error);
    box-shadow: 0 0 0 3px var(--error-muted);
}

/* Input Feedback */
.input-feedback {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    margin-top: var(--space-sm);
    min-height: 18px;
    color: var(--text-muted);
}

.input-feedback.error {
    color: var(--error);
}

.input-feedback.success {
    color: var(--success);
}

.input-feedback.info {
    color: var(--info);
}

/* Advanced Options */
.advanced-options {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-subtle);
}

.advanced-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-md);
    background: var(--surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.advanced-toggle:hover {
    background: var(--surface-2);
    border-color: var(--border-default);
    color: var(--text-primary);
}

.advanced-toggle::after {
    content: '›';
    font-size: 1.2rem;
    transform: rotate(90deg);
    transition: transform 0.2s ease;
    opacity: 0.5;
}

.advanced-toggle[aria-expanded="true"]::after {
    transform: rotate(-90deg);
}

.advanced-content {
    margin-top: var(--space-md);
    padding: var(--space-lg);
    background: var(--surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
}

.advanced-content .form-group {
    margin-bottom: var(--space-md);
}

.advanced-content .form-group:last-child {
    margin-bottom: 0;
}

.advanced-content label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    text-transform: none;
    letter-spacing: normal;
    font-size: 0.875rem;
}

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

.advanced-content input[type="file"] {
    width: 100%;
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border: 1px dashed var(--border-default);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.advanced-content input[type="file"]:hover {
    border-color: var(--accent-primary);
    background: var(--bg-elevated);
}

.advanced-content input[type="file"]:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.advanced-content select {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.advanced-content select:hover {
    border-color: var(--border-strong);
}

.advanced-content select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Range Slider */
input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--surface-2);
    border-radius: 3px;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    margin: var(--space-sm) 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--accent-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

#imageSizeValue,
#downloadScaleValue {
    font-weight: 600;
    color: var(--accent-primary);
}

#imagePreview {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

#previewImage {
    max-width: 180px;
    max-height: 90px;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    object-fit: contain;
}

#removeImageBtn {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
    background: var(--error);
    border-radius: var(--radius-sm);
}

/* Buttons */
button {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
    padding: var(--space-md) var(--space-lg);
    background: var(--accent-primary);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

button:hover:not(:disabled) {
    background: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

button:active:not(:disabled) {
    transform: translateY(0);
}

button:focus {
    outline: none;
}

button:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

#generateBtn {
    width: 100%;
    padding: var(--space-md) var(--space-xl);
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

/* Barcode Container */
.barcode-container {
    margin-top: var(--space-lg);
}

.barcode-row {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    display: grid;
    grid-template-columns: minmax(180px, 1fr) 2fr auto;
    align-items: center;
    gap: var(--space-lg);
    transition: all 0.2s ease;
}

.barcode-row:hover {
    border-color: var(--border-default);
    box-shadow: var(--shadow-md);
}

.barcode-info {
    min-width: 0;
}

.barcode-label {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    word-break: break-word;
    margin-bottom: var(--space-xs);
}

.barcode-type {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.barcode-display {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-md);
    background: #ffffff;
    border-radius: var(--radius-md);
    min-height: 100px;
}

.barcode-display canvas,
.barcode-display svg {
    max-width: 100%;
    height: auto;
}

.barcode-display div[id^="barcode-container-"] {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    overflow: visible;
}

.barcode-display div[id^="barcode-wrapper-"] {
    overflow: visible;
    display: inline-block;
}

.barcode-display div[id^="barcode-container-"][style*="flex-direction: column"] {
    flex-direction: column !important;
}

.barcode-display div[id^="image-container-"] {
    flex-shrink: 0;
}

.barcode-display div[id^="image-container-"][style*="position: absolute"] {
    pointer-events: none;
}

.barcode-display div[id^="image-container-"] img {
    object-fit: contain;
    display: block;
    pointer-events: none;
}

.download-btn {
    background: var(--success);
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8rem;
    white-space: nowrap;
}

.download-btn:hover:not(:disabled) {
    background: #16a34a;
}

.download-btn .spinner {
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 2px solid rgba(0, 0, 0, 0.2);
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Button Group */
.button-group {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

.download-all-btn {
    background: var(--info);
    flex: 1;
    min-width: 180px;
}

.download-all-btn:hover:not(:disabled) {
    background: #2563eb;
}

.download-all-btn:disabled {
    background: var(--surface-2);
    color: var(--text-muted);
}

.clear-btn {
    background: transparent;
    border: 1px solid var(--border-default);
    color: var(--text-secondary);
}

.clear-btn:hover:not(:disabled) {
    background: var(--error-muted);
    border-color: var(--error);
    color: var(--error);
    transform: none;
    box-shadow: none;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    color: var(--text-muted);
    background: var(--bg-secondary);
    border: 1px dashed var(--border-default);
    border-radius: var(--radius-lg);
}

.empty-state p {
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

/* Notification System */
.notification-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: 10000;
    display: flex;
    flex-direction: column-reverse;
    gap: var(--space-sm);
    max-width: 380px;
}

.notification {
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification-info {
    border-left: 3px solid var(--info);
}

.notification-success {
    border-left: 3px solid var(--success);
}

.notification-error {
    border-left: 3px solid var(--error);
}

.notification-warning {
    border-left: 3px solid var(--warning);
}

.notification-icon {
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.notification-content {
    flex: 1;
    min-width: 0;
}

.notification-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.notification-message {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: pre-line;
    line-height: 1.4;
}

.notification-close {
    background: none;
    border: none;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    font-size: 1.2rem;
    line-height: 1;
}

.notification-close:hover {
    background: var(--surface-1);
    color: var(--text-primary);
}

/* Loading Spinner */
.spinner-large {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(0, 0, 0, 0.2);
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

/* Progress Bar */
.progress-container {
    width: 100%;
    height: 4px;
    background: var(--surface-1);
    border-radius: 2px;
    overflow: hidden;
    margin-top: var(--space-sm);
}

.progress-bar {
    height: 100%;
    background: var(--accent-primary);
    transition: width 0.3s ease;
    border-radius: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--space-md);
    background: var(--accent-primary);
    color: var(--bg-primary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    z-index: 100;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: var(--space-md);
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus Visible */
*:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Keyboard Shortcuts Info */
.input-section > .input-feedback.info {
    background: var(--surface-1);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    border-left: 2px solid var(--accent-primary);
    margin-top: var(--space-lg);
}

/* Responsive Design */
@media (max-width: 900px) {
    .barcode-row {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .barcode-display {
        order: -1;
    }
    
    .download-btn {
        width: 100%;
    }
}

@media (max-width: 640px) {
    .container {
        padding: var(--space-md);
    }
    
    h1 {
        font-size: 1.25rem;
    }
    
    .input-section {
        padding: var(--space-lg);
    }
    
    .input-mode-toggle {
        width: 100%;
    }
    
    .mode-btn {
        flex: 1;
        text-align: center;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .button-group button {
        width: 100%;
    }
    
    .notification-container {
        left: var(--space-md);
        right: var(--space-md);
        bottom: var(--space-md);
        max-width: none;
    }
}

/* Animations for page load */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

header {
    animation: fadeInUp 0.5s ease both;
}

.input-section {
    animation: fadeInUp 0.5s ease 0.1s both;
}

.barcode-container {
    animation: fadeInUp 0.5s ease 0.2s both;
}

.barcode-row {
    animation: fadeInUp 0.3s ease both;
}