/* CSS Variables */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --text-color: #f1f5f9;
    --border-color: #334155;
    --success-color: #10b981;
    --error-color: #ef4444;
    --border-radius: 8px;
    --spacing-unit: 1rem;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    scroll-behavior: smooth;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

/* Header Styles */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    text-align: center;
    padding: calc(var(--spacing-unit) * 2) var(--spacing-unit);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Main Layout */
main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

/* Section Styles */
section {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 1.5);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

section h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-unit);
    font-size: 1.5rem;
}

section p {
    margin-bottom: var(--spacing-unit);
    opacity: 0.8;
}

/* Canvas Styles */
#nft-canvas {
    display: block;
    margin: 0 auto var(--spacing-unit);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: #fff;
    max-width: 100%;
    height: auto;
}

/* Button Styles */
button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Form Input Styles */
input, select, textarea {
    background-color: var(--background-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.75rem;
    font-size: 1rem;
    width: 100%;
    margin-bottom: var(--spacing-unit);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Category Management Styles */
.category-card {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1rem;
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.category-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    flex: 1;
}

.category-name[contenteditable="true"] {
    border: 1px solid var(--primary-color);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    outline: none;
    background: var(--surface-color);
}

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

.category-actions button {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    min-width: auto;
}

.add-category-btn {
    width: 100%;
    margin-top: 1rem;
    background: var(--surface-color);
    border: 2px dashed var(--border-color);
    color: var(--text-color);
}

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

/* Upload Zone Styles */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 1rem;
}

.upload-zone:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.upload-zone p {
    margin: 0;
    color: var(--text-color);
    opacity: 0.7;
}

.upload-zone.drag-over {
    border-color: var(--success-color);
    background: rgba(16, 185, 129, 0.1);
}

/* Trait Grid Styles */
.trait-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.trait-thumbnail {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s;
    background: var(--surface-color);
}

.trait-thumbnail:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
}

.trait-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

.trait-thumbnail .delete-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.trait-thumbnail:hover .delete-btn {
    opacity: 1;
}

.trait-name {
    padding: 0.5rem;
    font-size: 0.875rem;
    text-align: center;
    background: var(--surface-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-color);
}

/* Drag and Drop States */
.category-card.dragging {
    opacity: 0.5;
    transform: rotate(2deg);
}

.trait-thumbnail.dragging {
    opacity: 0.5;
    transform: scale(0.9) rotate(5deg);
}

.category-card {
    cursor: move;
}

.trait-thumbnail {
    cursor: move;
}

.trait-thumbnail .delete-btn {
    cursor: pointer;
}

/* Trait Control Styles */
.trait-control-group {
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.trait-control-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.trait-select {
    width: 100%;
    padding: 0.75rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-color);
    font-size: 1rem;
}

.trait-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.trait-select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Preview Metadata Styles */
.metadata-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-top: 1rem;
}

.metadata-card h3 {
    margin: 0 0 1rem 0;
    color: var(--primary-color);
    font-size: 1.25rem;
}

.selected-traits-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.selected-traits-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.selected-traits-list li:last-child {
    border-bottom: none;
}

.no-selection-message {
    text-align: center;
    opacity: 0.6;
    font-style: italic;
    margin: 1rem 0;
}

.canvas-info {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.canvas-info p {
    margin: 0.25rem 0;
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Canvas Loading Overlay */
#canvas-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    border-radius: var(--border-radius);
    z-index: 10;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#canvas-loading-overlay p {
    margin: 0;
    font-size: 1rem;
}

/* Rarity Badge Styles */
.rarity-badge {
    position: absolute;
    top: 4px;
    left: 4px;
    background: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 12px;
    font-weight: 600;
    z-index: 2;
}

.rarity-edit-btn {
    position: absolute;
    top: 4px;
    right: 30px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.trait-thumbnail:hover .rarity-edit-btn {
    opacity: 1;
}

/* Rarity Modal Styles */
.rarity-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.rarity-modal-content {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

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

.rarity-modal-header h3 {
    margin: 0;
    color: var(--primary-color);
}

.modal-close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.rarity-modal-body {
    padding: 1rem;
}

.trait-preview {
    text-align: center;
    margin-bottom: 1rem;
}

.trait-preview img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.rarity-controls {
    margin-top: 1rem;
}

.rarity-input-group {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin: 0.5rem 0;
}

#rarity-slider {
    flex: 1;
}

#rarity-input {
    width: 80px;
    margin: 0;
}

.rarity-help {
    font-size: 0.875rem;
    opacity: 0.7;
    margin-top: 0.5rem;
}

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

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

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

/* Generation Config Styles */
.generation-config {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.generation-config h3 {
    margin: 0 0 1rem 0;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.config-row {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    gap: 1rem;
}

.config-row label {
    font-weight: 600;
    min-width: 140px;
    color: var(--text-color);
}

.collection-size-input {
    font-size: 1.25rem;
    font-weight: 600;
    padding: 0.75rem;
    width: 120px;
    text-align: center;
}

.canvas-dimensions {
    font-family: monospace;
    background: var(--background-color);
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.generate-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1.25rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 200px;
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

.generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.generate-btn.loading {
    position: relative;
    color: transparent;
}

.generate-btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Progress Container Styles */
.progress-container {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.progress-bar-container {
    position: relative;
    background: var(--border-color);
    border-radius: 20px;
    height: 40px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    transition: width 0.3s ease;
    position: relative;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.875rem;
    z-index: 2;
}

.cancel-generation-btn {
    background: var(--error-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.875rem;
}

.cancel-generation-btn:hover {
    background: #dc2626;
}

/* Generated NFTs Preview Styles */
.generated-nfts-preview {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.generated-nfts-preview h3 {
    margin: 0 0 1rem 0;
    color: var(--primary-color);
}

.generated-nfts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.generated-nft-thumbnail {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s ease;
}

.generated-nft-thumbnail:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.generated-nft-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

.nft-info {
    padding: 0.5rem;
}

.nft-name {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nft-traits {
    font-size: 0.75rem;
    opacity: 0.7;
}

.show-more-text {
    text-align: center;
    opacity: 0.7;
    font-style: italic;
    margin: 1rem 0 0 0;
}

.nft-placeholder {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--border-color);
    color: var(--text-color);
    text-align: center;
}

.nft-note {
    font-size: 0.7rem;
    opacity: 0.6;
    margin-top: 0.25rem;
}

/* Metadata Configuration Styles */
.metadata-config {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 2rem;
}

.metadata-section {
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.collapsible-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--background-color);
    cursor: pointer;
    transition: background-color 0.2s;
}

.collapsible-header:hover {
    background: var(--border-color);
}

.collapsible-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-color);
}

.collapse-icon {
    font-size: 0.875rem;
    color: var(--text-color);
    transition: transform 0.2s;
}

.metadata-section-body {
    padding: 1rem;
    background: var(--surface-color);
    transition: max-height 0.3s ease;
}

.metadata-section-body.collapsed {
    display: none;
}

.metadata-field-group {
    margin-bottom: 1rem;
}

.metadata-field-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.metadata-field-group input,
.metadata-field-group textarea,
.metadata-field-group select {
    width: 100%;
    padding: 0.75rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-color);
    font-size: 1rem;
}

.metadata-field-group textarea {
    resize: vertical;
    min-height: 80px;
}

.metadata-help-text {
    font-size: 0.875rem;
    color: var(--text-color);
    opacity: 0.7;
    margin-top: 0.25rem;
}

.royalty-input-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.royalty-input-group input {
    width: 100px;
    margin: 0;
}

.royalty-input-group span {
    font-weight: 600;
    color: var(--text-color);
}

.cid-input-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.cid-input-group input {
    flex: 1;
    margin: 0;
}

.cid-input-group button {
    white-space: nowrap;
}

.custom-attribute-item {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    align-items: center;
}

.custom-attribute-item input,
.custom-attribute-item select {
    flex: 1;
    margin: 0;
}

.btn-danger {
    background: var(--error-color);
    color: white;
    border: none;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.875rem;
}

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

.metadata-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.metadata-status {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius);
}

.status-info {
    color: var(--text-color);
    opacity: 0.7;
    margin: 0;
}

.status-warning {
    color: #f59e0b;
    margin: 0;
}

.status-success {
    color: var(--success-color);
    margin: 0;
}

.status-partial {
    color: var(--primary-color);
    margin: 0;
}

/* Metadata Modal Styles */
.metadata-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.metadata-modal.hidden {
    display: none;
}

.metadata-modal-content {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.metadata-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--background-color);
}

.metadata-modal-header h3 {
    margin: 0;
    color: var(--primary-color);
}

.metadata-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

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

.metadata-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.tab-btn {
    background: none;
    border: none;
    padding: 0.75rem 1rem;
    cursor: pointer;
    color: var(--text-color);
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.tab-btn:hover {
    background: var(--border-color);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.metadata-tab-panel {
    max-height: 400px;
    overflow-y: auto;
}

.metadata-sample {
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
}

.metadata-sample h5 {
    margin: 0 0 1rem 0;
    color: var(--primary-color);
}

.metadata-sample pre {
    background: var(--surface-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    overflow-x: auto;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.btn-small {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

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

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
}

.stat-item label {
    font-weight: 600;
}

.trait-distribution {
    max-height: 300px;
    overflow-y: auto;
}

.category-stats {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
}

.category-stats h6 {
    margin: 0 0 1rem 0;
    color: var(--primary-color);
    font-size: 1rem;
}

.trait-stat {
    display: flex;
    justify-content: space-between;
    padding: 0.25rem 0;
    font-size: 0.875rem;
}

/* NFT Metadata Badge */
.metadata-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--success-color);
    color: white;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 12px;
    font-weight: 600;
    z-index: 2;
}

.nft-actions {
    position: absolute;
    bottom: 4px;
    left: 4px;
    right: 4px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s;
}

.generated-nft-thumbnail:hover .nft-actions {
    opacity: 1;
}

/* Metadata Editor Styles */
.metadata-editor-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.metadata-view-panel,
.metadata-edit-panel {
    min-height: 300px;
}

.metadata-edit-panel textarea {
    width: 100%;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-color);
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    padding: 1rem;
    resize: vertical;
}

.validation-errors {
    margin-top: 1rem;
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    color: var(--error-color);
}

.error-message strong {
    display: block;
    margin-bottom: 0.5rem;
}

.error-message ul {
    margin: 0.5rem 0 0 1rem;
}

.error-message li {
    margin-bottom: 0.25rem;
}

/* Export Options Panel Styles */
.export-options-panel {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 2rem;
}

.export-options-panel h3 {
    margin: 0 0 1.5rem 0;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.export-format-group,
.export-naming-group,
.export-options-group {
    margin-bottom: 1.5rem;
}

.export-format-group label,
.export-naming-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.format-radio-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all 0.2s;
}

.radio-option:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.radio-option input[type="radio"] {
    margin: 0;
    width: auto;
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 600;
}

.checkbox-option input[type="checkbox"] {
    margin: 0;
    width: auto;
}

.quality-slider-container {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
}

.quality-slider-container label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

#jpeg-quality {
    width: 100%;
    margin: 0;
}

.bulk-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.download-zip-btn {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
    min-width: 200px;
}

.download-zip-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
}

.download-zip-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.export-status {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius);
}

/* Export Progress Modal Styles */
.export-progress-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.export-progress-content {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    overflow: hidden;
}

.export-progress-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--background-color);
}

.export-progress-header h3 {
    margin: 0;
    color: var(--primary-color);
}

.export-progress-body {
    padding: 1.5rem;
}

.export-progress-bar-container {
    background: var(--border-color);
    border-radius: 20px;
    height: 30px;
    overflow: hidden;
    margin-bottom: 1rem;
    position: relative;
}

.export-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    transition: width 0.3s ease;
    width: 0%;
}

.export-progress-text {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.export-progress-details {
    font-size: 0.875rem;
    opacity: 0.7;
    color: var(--text-color);
}

.export-progress-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    background: var(--background-color);
    text-align: right;
}

/* NFT Download Buttons */
.nft-download-buttons {
    position: absolute;
    top: 4px;
    left: 4px;
    display: flex;
    gap: 2px;
    opacity: 0;
    transition: opacity 0.2s;
}

.generated-nft-thumbnail:hover .nft-download-buttons {
    opacity: 1;
}

.download-btn {
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    padding: 4px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
    min-width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Focus styles for accessibility */
.upload-zone:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.trait-thumbnail .delete-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 1px;
}

/* File Upload Areas */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 2);
    text-align: center;
    transition: all 0.2s ease;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(99, 102, 241, 0.05);
}

.upload-area.drag-over {
    border-color: var(--success-color);
    background-color: rgba(16, 185, 129, 0.1);
}

/* Footer Styles */
footer {
    text-align: center;
    padding: calc(var(--spacing-unit) * 2);
    border-top: 1px solid var(--border-color);
    margin-top: calc(var(--spacing-unit) * 3);
    opacity: 0.8;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
        gap: var(--spacing-unit);
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    section {
        padding: var(--spacing-unit);
    }
    
    .category-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .category-actions {
        justify-content: center;
    }
    
    .trait-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 0 0.5rem;
    }
    
    header {
        padding: var(--spacing-unit);
    }
    
    header h1 {
        font-size: 1.75rem;
    }
    
    button {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .category-actions button {
        width: auto;
        flex: 1;
        margin-bottom: 0;
    }
    
    .upload-zone {
        padding: 1rem;
    }
    
    .trait-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
    
    .trait-name {
        font-size: 0.75rem;
        padding: 0.25rem;
    }
    
    .trait-control-group {
        padding: 0.75rem;
        margin-bottom: 0.75rem;
    }
    
    .trait-control-label {
        font-size: 0.875rem;
    }
    
    .trait-select {
        padding: 0.5rem;
        font-size: 0.875rem;
    }
    
    .metadata-card {
        padding: 0.75rem;
    }
    
    .metadata-card h3 {
        font-size: 1.125rem;
    }
    
    .config-row {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .config-row label {
        min-width: auto;
        font-size: 0.875rem;
    }
    
    .generate-btn {
        font-size: 1rem;
        padding: 0.75rem 1.5rem;
        min-width: auto;
    }
    
    .generated-nfts-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 0.75rem;
    }
    
    .rarity-modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .rarity-input-group {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    #rarity-input {
        width: 100%;
    }
    
    .metadata-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .metadata-actions button {
        width: 100%;
    }
    
    .custom-attribute-item {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .royalty-input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .royalty-input-group input {
        width: 100%;
    }
    
    .metadata-modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .metadata-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1;
        min-width: 100px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .nft-actions {
        position: static;
        opacity: 1;
        margin-top: 0.5rem;
    }
    
    .cid-input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .cid-input-group input {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .metadata-editor-tabs {
        flex-wrap: wrap;
    }
    
    .metadata-edit-panel textarea {
        font-size: 0.75rem;
    }
    
    .format-radio-group {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .bulk-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .bulk-actions button {
        width: 100%;
        min-width: auto;
    }
    
    .download-zip-btn {
        font-size: 1rem;
        padding: 0.75rem 1.5rem;
    }
    
    .export-progress-content {
        width: 95%;
        margin: 1rem;
    }
    
    .nft-download-buttons {
        position: static;
        opacity: 1;
        margin-top: 0.5rem;
        justify-content: center;
    }
    
    .download-btn {
        padding: 6px 8px;
        font-size: 0.7rem;
    }
}

/* Notification Styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 1000;
    max-width: 300px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

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

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

.notification.error {
    background-color: var(--error-color);
}

.notification.warning {
    background-color: #f59e0b;
}

.notification.info {
    background-color: var(--primary-color);
}

/* Utility Classes */
.hidden {
    display: none;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

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

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