:root {
  --ul-modal-z: 9999;
  --ul-modal-bg: rgba(0, 0, 0, 0.7);
  --ul-modal-radius: 16px;
  --ul-primary: #6366f1;
  --ul-primary-hover: #4f46e5;
  --ul-success: #10b981;
  --ul-success-hover: #059669;
  --ul-error: #ef4444;
  --ul-warning: #f59e0b;
  --ul-text: #1f2937;
  --ul-text-secondary: #6b7280;
  --ul-border: #e5e7eb;
  --ul-bg-light: #f9fafb;
  --ul-bg-canvas: linear-gradient(180deg, #f5f5f5 0%, #e0e0e0 100%);
}

.ul-tshirt-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--ul-modal-bg);
  z-index: var(--ul-modal-z);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.ul-tshirt-overlay.active {
  display: flex;
  align-items: center;
  justify-content: center;
  animation: ulFadeIn 0.25s ease-out;
}

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

.ul-tshirt-modal {
  background: #fff;
  border-radius: var(--ul-modal-radius);
  width: 90vw;
  max-width: 1200px;
  height: 90vh;
  max-height: 800px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  overflow: hidden;
}

.ul-tshirt-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--ul-border);
  background: #fff;
  flex-shrink: 0;
}

.ul-tshirt-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ul-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.ul-tshirt-close {
  background: none;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ul-text-secondary);
  transition: all 0.2s;
}

.ul-tshirt-close:hover {
  background: var(--ul-bg-light);
  color: var(--ul-text);
}

.ul-tshirt-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px 24px;
  background: var(--ul-bg-light);
  border-bottom: 1px solid var(--ul-border);
  flex-shrink: 0;
}

.ul-step-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ul-text-secondary);
  font-size: 14px;
  transition: color 0.2s;
}

.ul-step-item.active {
  color: var(--ul-primary);
}

.ul-step-item.completed {
  color: var(--ul-success);
}

.ul-step-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid currentColor;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 12px;
  transition: all 0.2s;
}

.ul-step-item.active .ul-step-number {
  background: var(--ul-primary);
  border-color: var(--ul-primary);
  color: #fff;
}

.ul-step-item.completed .ul-step-number {
  background: var(--ul-success);
  border-color: var(--ul-success);
  color: #fff;
}

.ul-step-label {
  font-weight: 500;
}

.ul-step-connector {
  width: 60px;
  height: 2px;
  background: var(--ul-border);
  margin: 0 16px;
  transition: background 0.2s;
}

.ul-step-connector.completed {
  background: var(--ul-success);
}

.ul-tshirt-body {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.ul-tshirt-content {
  flex: 1;
  overflow-y: auto;
  padding: 0;
}

.ul-step-panel {
  display: none;
  height: 100%;
  animation: ulSlideIn 0.3s ease-out;
}

.ul-step-panel.active {
  display: flex;
  flex-direction: column;
}

@keyframes ulSlideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

.ul-step1-content {
  padding: 32px;
  max-width: 700px;
  margin: 0 auto;
}

.ul-step1-section-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ul-text);
  margin-bottom: 8px;
}

.ul-step1-section-desc {
  color: var(--ul-text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
}

.ul-inherited-design {
  border: 2px solid var(--ul-border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.ul-inherited-design.selected {
  border-color: var(--ul-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.ul-inherited-preview {
  display: flex;
  align-items: center;
  gap: 16px;
}

.ul-inherited-thumb {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  object-fit: contain;
  background: var(--ul-bg-light);
  border: 1px solid var(--ul-border);
}

.ul-inherited-info {
  flex: 1;
}

.ul-inherited-name {
  font-weight: 600;
  color: var(--ul-text);
  margin-bottom: 4px;
  word-break: break-all;
}

.ul-inherited-meta {
  font-size: 13px;
  color: var(--ul-text-secondary);
}

.ul-inherited-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 6px;
  padding: 4px 8px;
  background: rgba(16, 185, 129, 0.1);
  color: var(--ul-success);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.ul-use-design-btn {
  width: 100%;
  margin-top: 16px;
  padding: 12px 24px;
  background: var(--ul-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.ul-use-design-btn:hover {
  background: var(--ul-primary-hover);
}

.ul-use-design-btn.selected {
  background: var(--ul-success);
}

.ul-divider {
  display: flex;
  align-items: center;
  margin: 24px 0;
  color: var(--ul-text-secondary);
  font-size: 14px;
}

.ul-divider::before,
.ul-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--ul-border);
}

.ul-divider span {
  padding: 0 16px;
}

.ul-upload-zone {
  border: 2px dashed var(--ul-border);
  border-radius: 12px;
  padding: 40px 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.ul-upload-zone:hover,
.ul-upload-zone.dragover {
  border-color: var(--ul-primary);
  background: rgba(99, 102, 241, 0.03);
}

.ul-upload-zone.uploading {
  pointer-events: none;
  opacity: 0.7;
}

.ul-upload-zone-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.ul-upload-zone-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--ul-text);
  margin-bottom: 4px;
}

.ul-upload-zone-hint {
  font-size: 13px;
  color: var(--ul-text-secondary);
}

.ul-upload-progress {
  margin-top: 16px;
}

.ul-upload-progress-bar {
  height: 6px;
  background: var(--ul-border);
  border-radius: 3px;
  overflow: hidden;
}

.ul-upload-progress-fill {
  height: 100%;
  background: var(--ul-primary);
  border-radius: 3px;
  transition: width 0.3s;
  width: 0%;
}

.ul-upload-progress-text {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ul-text-secondary);
}

.ul-step2-layout {
  display: flex;
  height: 100%;
}

.ul-step2-3d {
  flex: 1;
  min-width: 0;
  background: var(--ul-bg-canvas);
  position: relative;
}

.ul-step2-sidebar {
  width: 340px;
  border-left: 1px solid var(--ul-border);
  background: #fff;
  overflow-y: auto;
  flex-shrink: 0;
}

.ul-3d-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.ul-3d-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--ul-bg-canvas);
  color: var(--ul-text-secondary);
}

.ul-3d-spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--ul-border);
  border-top-color: var(--ul-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 12px;
}

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

.ul-quick-views {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  background: #fff;
  padding: 6px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.ul-quick-view-btn {
  padding: 8px 16px;
  background: none;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  color: var(--ul-text-secondary);
  transition: all 0.2s;
}

.ul-quick-view-btn:hover {
  background: var(--ul-bg-light);
  color: var(--ul-text);
}

.ul-quick-view-btn.active {
  background: var(--ul-primary);
  color: #fff;
}

.ul-sidebar-section {
  padding: 20px;
  border-bottom: 1px solid var(--ul-border);
}

.ul-sidebar-section:last-child {
  border-bottom: none;
}

.ul-sidebar-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--ul-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.ul-color-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ul-color-swatch {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  position: relative;
  transition: transform 0.2s;
}

.ul-color-swatch:hover {
  transform: scale(1.1);
}

.ul-color-swatch.active {
  border-color: var(--ul-primary);
}

.ul-color-swatch.light {
  border: 1px solid var(--ul-border);
}

.ul-color-swatch.active::after {
  content: '✓';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.ul-color-swatch.light.active::after {
  color: var(--ul-text);
  text-shadow: none;
}

.ul-size-select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--ul-border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--ul-text);
  background: #fff;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}

.ul-size-select:focus {
  outline: none;
  border-color: var(--ul-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.ul-location-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ul-location-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--ul-bg-light);
  border: 1px solid var(--ul-border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.ul-location-item:hover {
  border-color: var(--ul-primary);
}

.ul-location-item.selected {
  background: rgba(99, 102, 241, 0.05);
  border-color: var(--ul-primary);
}

.ul-location-check {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ul-location-checkbox {
  width: 18px;
  height: 18px;
  accent-color: var(--ul-primary);
  cursor: pointer;
}

.ul-location-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--ul-text);
}

.ul-location-price {
  font-size: 13px;
  color: var(--ul-text-secondary);
}

.ul-location-price.free {
  color: var(--ul-success);
  font-weight: 500;
}

.ul-location-settings {
  padding: 16px;
  background: var(--ul-bg-light);
  border-radius: 8px;
  margin-top: 12px;
  display: none;
}

.ul-location-settings.visible {
  display: block;
}

.ul-location-settings-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--ul-text-secondary);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.ul-slider-group {
  margin-bottom: 14px;
}

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

.ul-slider-label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--ul-text);
  margin-bottom: 6px;
}

.ul-slider-value {
  font-weight: 600;
  color: var(--ul-primary);
}

.ul-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--ul-border);
  outline: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.ul-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ul-primary);
  cursor: pointer;
  transition: transform 0.2s;
}

.ul-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.ul-price-box {
  background: var(--ul-bg-light);
  border-radius: 8px;
  padding: 16px;
}

.ul-price-row {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--ul-text-secondary);
  margin-bottom: 8px;
}

.ul-price-row.total {
  font-size: 16px;
  font-weight: 700;
  color: var(--ul-text);
  padding-top: 8px;
  border-top: 1px solid var(--ul-border);
  margin-bottom: 0;
}

.ul-step3-content {
  padding: 32px;
  max-width: 700px;
  margin: 0 auto;
}

.ul-details-preview {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--ul-bg-light);
  border-radius: 12px;
  margin-bottom: 24px;
}

.ul-details-preview-thumbs {
  display: flex;
  gap: 8px;
}

.ul-details-preview-thumb {
  width: 60px;
  height: 60px;
  border-radius: 6px;
  background: #fff;
  border: 1px solid var(--ul-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.ul-details-preview-info {
  flex: 1;
}

.ul-details-preview-title {
  font-weight: 600;
  color: var(--ul-text);
  margin-bottom: 4px;
}

.ul-details-preview-meta {
  font-size: 13px;
  color: var(--ul-text-secondary);
}

.ul-question-group {
  margin-bottom: 20px;
}

.ul-question-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--ul-text);
  margin-bottom: 8px;
}

.ul-question-label .required {
  color: var(--ul-error);
}

.ul-question-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--ul-border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--ul-text);
  transition: border-color 0.2s;
}

.ul-question-input:focus {
  outline: none;
  border-color: var(--ul-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.ul-question-textarea {
  resize: vertical;
  min-height: 100px;
}

.ul-quantity-control {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ul-quantity-btn {
  width: 40px;
  height: 40px;
  border: 1px solid var(--ul-border);
  background: #fff;
  border-radius: 8px;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ul-text);
  transition: all 0.2s;
}

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

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

.ul-quantity-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--ul-text);
  min-width: 40px;
  text-align: center;
}

.ul-step4-content {
  padding: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.ul-review-card {
  border: 1px solid var(--ul-border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 24px;
}

.ul-review-header {
  background: var(--ul-bg-light);
  padding: 16px 20px;
  font-weight: 600;
  color: var(--ul-text);
  border-bottom: 1px solid var(--ul-border);
}

.ul-review-body {
  padding: 20px;
}

.ul-review-preview-grid {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

.ul-review-preview-item {
  flex: 1;
  text-align: center;
}

.ul-review-preview-label {
  font-size: 12px;
  color: var(--ul-text-secondary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.ul-review-preview-box {
  width: 100px;
  height: 100px;
  margin: 0 auto;
  background: var(--ul-bg-light);
  border: 1px solid var(--ul-border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.ul-review-preview-box:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  border-color: var(--ul-primary);
}

.ul-review-preview-box:active {
  transform: scale(1.02);
}

.ul-lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  z-index: 10001;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.ul-lightbox-overlay.active {
  opacity: 1;
  visibility: visible;
}

.ul-lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  animation: ul-lightbox-zoom-in 0.3s ease;
}

@keyframes ul-lightbox-zoom-in {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.ul-lightbox-image {
  max-width: 100%;
  max-height: 80vh;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.ul-lightbox-label {
  text-align: center;
  color: white;
  font-size: 16px;
  font-weight: 600;
  margin-top: 12px;
  text-transform: uppercase;
}

.ul-lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  font-size: 28px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, transform 0.2s ease;
}

.ul-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.ul-lightbox-hint {
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
}

.ul-review-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.ul-review-list li {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px dashed var(--ul-border);
  font-size: 14px;
}

.ul-review-list li:last-child {
  border-bottom: none;
}

.ul-review-list-label {
  color: var(--ul-text-secondary);
}

.ul-review-list-value {
  color: var(--ul-text);
  font-weight: 500;
}

.ul-review-price-breakdown {
  background: var(--ul-bg-light);
  border-radius: 8px;
  padding: 16px;
}

.ul-review-price-row {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  padding: 6px 0;
  color: var(--ul-text-secondary);
}

.ul-review-price-row.total {
  font-size: 18px;
  font-weight: 700;
  color: var(--ul-text);
  padding-top: 12px;
  margin-top: 8px;
  border-top: 2px solid var(--ul-border);
}

.ul-confirmation {
  background: var(--ul-bg-light);
  border: 1px solid var(--ul-border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 24px;
}

.ul-confirmation-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
}

.ul-confirmation-checkbox {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  accent-color: var(--ul-primary);
  flex-shrink: 0;
}

.ul-confirmation-text {
  font-size: 14px;
  color: var(--ul-text);
  line-height: 1.5;
}

.ul-action-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ul-action-btn {
  width: 100%;
  padding: 16px 24px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s;
}

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

.ul-action-btn.primary {
  background: var(--ul-success);
  color: #fff;
}

.ul-action-btn.primary:hover:not(:disabled) {
  background: var(--ul-success-hover);
}

.ul-action-btn.secondary {
  background: var(--ul-primary);
  color: #fff;
}

.ul-action-btn.secondary:hover:not(:disabled) {
  background: var(--ul-primary-hover);
}

.ul-tshirt-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-top: 1px solid var(--ul-border);
  background: #fff;
  flex-shrink: 0;
}

.ul-nav-btn {
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s;
}

.ul-nav-btn.back {
  background: none;
  border: 1px solid var(--ul-border);
  color: var(--ul-text-secondary);
}

.ul-nav-btn.back:hover {
  border-color: var(--ul-text-secondary);
  color: var(--ul-text);
}

.ul-nav-btn.next {
  background: var(--ul-primary);
  border: none;
  color: #fff;
}

.ul-nav-btn.next:hover:not(:disabled) {
  background: var(--ul-primary-hover);
}

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

.ul-nav-btn.hidden {
  visibility: hidden;
}

.ul-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--ul-text);
  color: #fff;
  padding: 14px 24px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  z-index: 10000;
  opacity: 0;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.ul-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.ul-toast.success {
  background: var(--ul-success);
}

.ul-toast.error {
  background: var(--ul-error);
}

@media (max-width: 900px) {
  .ul-tshirt-modal {
    width: 100%;
    height: 100%;
    max-height: 100%;
    border-radius: 0;
  }

  .ul-step2-layout {
    flex-direction: column;
  }

  .ul-step2-3d {
    min-height: 300px;
    flex: none;
  }

  .ul-step2-sidebar {
    width: 100%;
    border-left: none;
    border-top: 1px solid var(--ul-border);
    max-height: 50vh;
  }

  .ul-tshirt-steps {
    padding: 12px 16px;
    overflow-x: auto;
  }

  .ul-step-connector {
    width: 30px;
    margin: 0 8px;
  }

  .ul-step-label {
    display: none;
  }

  .ul-quick-views {
    bottom: 8px;
    padding: 4px;
  }

  .ul-quick-view-btn {
    padding: 6px 12px;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .ul-step1-content,
  .ul-step3-content,
  .ul-step4-content {
    padding: 20px;
  }

  .ul-action-buttons {
    gap: 10px;
  }

  .ul-action-btn {
    padding: 14px 20px;
    font-size: 15px;
  }
}

@media (max-width: 768px) {

  .ul-tshirt-modal {
    width: 100vw;
    max-width: 100vw;
    height: 100vh;
    max-height: 100vh;
    border-radius: 0;
  }

  .ul-tshirt-header {
    padding: 12px 16px;
  }

  .ul-tshirt-title {
    font-size: 16px;
  }

  .ul-step2-layout {
    flex-direction: column;
  }

  .ul-step2-3d {
    height: 50vh;
    min-height: 280px;
    max-height: 400px;
    flex-shrink: 0;
  }

  .ul-step2-sidebar {
    width: 100%;
    max-height: none;
    flex: 1;
    border-left: none;
    border-top: 1px solid var(--ul-border);
    overflow-y: auto;
  }

  .ul-color-swatch {
    width: 44px;
    height: 44px;
    min-width: 44px;
  }

  .ul-location-item {
    padding: 14px 16px;
    min-height: 52px;
  }

  .ul-option-section {
    border-bottom: 1px solid var(--ul-border);
  }

  .ul-option-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    cursor: pointer;
    background: var(--ul-bg-light);
    -webkit-tap-highlight-color: transparent;
  }

  .ul-option-section-header::after {
    content: '▼';
    font-size: 10px;
    color: var(--ul-text-secondary);
    transition: transform 0.2s;
  }

  .ul-option-section.collapsed .ul-option-section-header::after {
    transform: rotate(-90deg);
  }

  .ul-option-section.collapsed .ul-option-section-content {
    display: none;
  }

  .ul-quick-views {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 8px 12px;
    gap: 8px;
  }

  .ul-quick-views::-webkit-scrollbar {
    display: none;
  }

  .ul-quick-view-btn {
    flex-shrink: 0;
    padding: 10px 16px;
    font-size: 13px;
    border-radius: 20px;
  }

  .ul-location-settings {
    padding: 12px 16px;
  }

  .ul-slider-group {
    margin-bottom: 16px;
  }

  .ul-slider-track {
    height: 8px;
  }

  .ul-tshirt-nav {
    position: sticky;
    bottom: 0;
    background: #fff;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 10;
  }

  .ul-nav-btn {
    padding: 16px 24px;
    font-size: 16px;
    min-height: 52px;
  }
}

.ul-3d-fallback {
  display: none;
}

.ul-3d-fallback.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: var(--ul-bg-canvas);
  position: relative;
}

.ul-3d-fallback-notice {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 12px;
  z-index: 5;
}

.ul-fallback-image-container {
  position: relative;
  width: 300px;
  height: 350px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ul-fallback-tshirt {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.ul-fallback-design-overlay {
  position: absolute;
  width: 120px;
  height: 120px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -60%);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  pointer-events: none;
  transition: transform 0.2s;
}

.ul-fallback-view-tabs {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.ul-fallback-view-tab {
  padding: 8px 16px;
  background: #fff;
  border: 2px solid var(--ul-border);
  border-radius: 20px;
  cursor: pointer;
  font-size: 13px;
  color: var(--ul-text-secondary);
  transition: all 0.2s;
}

.ul-fallback-view-tab.active {
  background: var(--ul-primary);
  border-color: var(--ul-primary);
  color: #fff;
}

@media (max-width: 768px) {
  .ul-confirm-overlay.active .ul-confirm-modal {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: auto;
    max-height: 85vh;
    border-radius: 20px 20px 0 0;
    animation: ulSlideUp 0.3s ease-out;
  }

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

  .ul-confirm-header {
    padding: 20px 20px 16px;
  }

  .ul-confirm-modal::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 4px;
    background: #d1d5db;
    border-radius: 2px;
  }

  .ul-confirm-body {
    max-height: 50vh;
    overflow-y: auto;
  }

  .ul-confirm-footer {
    padding: 16px 20px 24px;
    padding-bottom: calc(24px + env(safe-area-inset-bottom, 0px));
  }

  .ul-confirm-btn {
    padding: 16px 24px;
    font-size: 16px;
    min-height: 52px;
  }
}

@media (pointer: coarse) {

  .ul-tshirt-close,
  .ul-nav-btn,
  .ul-action-btn {
    min-height: 48px;
    min-width: 48px;
  }

  .ul-color-swatch:hover,
  .ul-location-item:hover,
  .ul-quick-view-btn:hover {
    transform: none;
  }

  .ul-color-swatch:active {
    transform: scale(0.95);
  }

  .ul-location-item:active {
    background: var(--ul-bg-light);
  }

  .ul-quick-view-btn:active {
    background: var(--ul-primary);
    color: #fff;
  }

  input[type="range"]::-webkit-slider-thumb {
    width: 24px;
    height: 24px;
  }

  input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
  }
}

@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .ul-tshirt-modal {
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }

  .ul-tshirt-nav {
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ul-tshirt-overlay,
  .ul-color-swatch,
  .ul-location-item,
  .ul-quick-view-btn,
  .ul-confirm-modal,
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}