/* CSS Custom Properties - Design System */
:root {
  /* Light mode (default) */
  --bg-primary: #f8f9fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e9ecef;
  --text-primary: #1a1a2e;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;
  --accent: #4a90a4;
  --accent-hover: #3d7a8c;
  --accent-faded: rgba(74, 144, 164, 0.15);
  --border: #e9ecef;
  --border-focus: #4a90a4;
  --shadow: rgba(0, 0, 0, 0.05);
  --shadow-hover: rgba(0, 0, 0, 0.1);
  --success: #28a745;
  --error: #dc3545;
  --warning: #ffc107;
}

[data-theme="dark"] {
  --bg-primary: #1a1a2e;
  --bg-secondary: #252542;
  --bg-tertiary: #3d3d5c;
  --text-primary: #f8f9fa;
  --text-secondary: #adb5bd;
  --text-muted: #6c757d;
  --accent: #6db3c9;
  --accent-hover: #8ac4d4;
  --accent-faded: rgba(109, 179, 201, 0.2);
  --border: #3d3d5c;
  --border-focus: #6db3c9;
  --shadow: rgba(0, 0, 0, 0.2);
  --shadow-hover: rgba(0, 0, 0, 0.3);
  --success: #34d058;
  --error: #f85149;
  --warning: #f0ad4e;
}

/* Skip Link - Accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  padding: 12px 24px;
  background: var(--accent);
  color: #ffffff;
  text-decoration: none;
  font-weight: 500;
  border-radius: 0 0 8px 8px;
  z-index: 10000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--bg-secondary);
  outline-offset: 2px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Smooth transitions for theme changes */
.card,
.modal,
.toast,
input,
select,
textarea,
.preview-container,
.tabs,
.toggle-group,
.file-upload-label {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

/* Header */
.header {
  margin-bottom: 32px;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.header-text {
  text-align: left;
}

.title {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 4px 0;
  line-height: 1.2;
}

.subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--border);
  border-color: var(--text-muted);
  transform: scale(1.05);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-icon {
  width: 20px;
  height: 20px;
  transition: opacity 0.2s, transform 0.3s;
}

/* Light mode: show sun, hide moon */
.sun-icon {
  display: block;
}

.moon-icon {
  display: none;
}

/* Dark mode: show moon, hide sun */
[data-theme="dark"] .sun-icon {
  display: none;
}

[data-theme="dark"] .moon-icon {
  display: block;
}

@media (max-width: 500px) {
  .header-content {
    flex-direction: column;
    text-align: center;
  }

  .header-text {
    text-align: center;
    order: 1;
  }

  .theme-toggle {
    order: 0;
    align-self: flex-end;
  }
}

/* Main Content */
.main-content {
  animation: fadeUp 0.4s ease-out;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Staggered section animations */
.form-section {
  animation: fadeUp 0.4s ease-out backwards;
}

.form-section:nth-child(1) { animation-delay: 0ms; }
.form-section:nth-child(2) { animation-delay: 50ms; }
.form-section:nth-child(3) { animation-delay: 100ms; }
.form-section:nth-child(4) { animation-delay: 150ms; }
.form-section:nth-child(5) { animation-delay: 200ms; }
.form-section:nth-child(6) { animation-delay: 250ms; }
.form-section:nth-child(7) { animation-delay: 300ms; }

.preview-panel {
  animation: fadeUp 0.4s ease-out 100ms backwards;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Builder Layout */
.builder-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

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

/* Card */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 2px 8px var(--shadow);
}

/* Form Panel */
.form-panel {
  overflow: visible;
}

/* Form Sections */
.form-section {
  border: none;
  padding: 0;
  margin: 0 0 24px 0;
}

.form-section:last-child {
  margin-bottom: 0;
}

.section-header {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding: 0;
}

.section-hint {
  font-size: 14px;
  color: var(--text-secondary);
  margin: -8px 0 16px 0;
}

/* Form Groups */
.form-group {
  margin-bottom: 16px;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

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

/* Form Rows */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-row-3 {
  grid-template-columns: 2fr 1fr 1fr;
}

@media (max-width: 600px) {
  .form-row,
  .form-row-3 {
    grid-template-columns: 1fr;
  }
}

.form-group-small {
  min-width: 80px;
}

/* Input Wrapper */
.input-wrapper {
  position: relative;
}

/* Inputs */
input, select, textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 16px;
  font-family: inherit;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

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

input::placeholder {
  color: var(--text-muted);
}

/* Prevent browser autofill from changing background color */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 30px var(--bg-secondary) inset !important;
  -webkit-text-fill-color: var(--text-primary) !important;
  transition: background-color 5000s ease-in-out 0s;
}

input.has-value {
  padding-right: 40px;
}

select {
  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 12 12'%3E%3Cpath fill='%236c757d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* Clear Buttons */
.clear-button {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  padding: 0;
  background: var(--bg-tertiary);
  border: none;
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s, background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.input-wrapper:hover .clear-button.visible,
.input-wrapper input:focus ~ .clear-button.visible,
.clear-button.visible:focus {
  opacity: 1;
}

.clear-button:hover {
  background: var(--text-muted);
  color: var(--bg-secondary);
}

/* Social Icons in Labels */
.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  margin-right: 6px;
  color: var(--text-secondary);
}

.social-inputs .form-group {
  margin-bottom: 12px;
}

/* Preview Panel */
.preview-panel {
  position: sticky;
  top: 24px;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.preview-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

/* Preview Background Toggle */
.preview-bg-toggle {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 4px;
}

.preview-bg-btn {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.preview-bg-btn.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
  box-shadow: 0 1px 3px var(--shadow);
}

/* Preview Container */
.preview-container {
  min-height: 200px;
  transition: background-color 0.2s;
  /* Always use explicit white for light preview, regardless of app theme */
  background-color: #ffffff !important;
  border-color: #e9ecef !important;
}

.preview-container.dark-bg {
  background-color: #1a1a2e !important;
  border-color: #3d3d5c !important;
}

.preview-content {
  font-family: Arial, sans-serif;
  font-size: 14px;
  line-height: 1.4;
}

.preview-placeholder {
  color: var(--text-muted);
  font-style: italic;
  margin: 0;
}

.preview-container.dark-bg .preview-placeholder {
  color: #6c757d;
}

/* Action Buttons */
.action-buttons {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.btn-primary {
  flex: 1;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 500;
  font-family: inherit;
  color: #ffffff;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--shadow-hover);
}

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

.btn-primary:disabled {
  background: var(--text-muted);
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

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

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 24px;
  box-shadow: 0 4px 16px var(--shadow-hover);
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
  z-index: 1001;
}

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

.toast.success {
  border-left: 4px solid var(--success);
}

.toast-icon {
  color: var(--success);
  font-weight: bold;
}

.toast-message {
  color: var(--text-primary);
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}

.modal-backdrop.visible {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-secondary);
  border-radius: 16px;
  padding: 32px;
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform 0.2s;
}

.modal-backdrop.visible .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.modal-header h2 {
  font-size: 20px;
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
}

.modal-close {
  width: 32px;
  height: 32px;
  padding: 0;
  background: var(--bg-tertiary);
  border: none;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.modal-close:hover {
  background: var(--border);
}

/* Tabs */
.tabs {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 24px;
}

.tab {
  flex: 1;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.tab.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
  box-shadow: 0 1px 3px var(--shadow);
}

/* Tab Content */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.instruction-list {
  margin: 0;
  padding: 0 0 0 24px;
  color: var(--text-primary);
}

.instruction-list li {
  margin-bottom: 12px;
  line-height: 1.6;
}

.instruction-list li:last-child {
  margin-bottom: 0;
}

.modal-note {
  margin: 24px 0 0 0;
  padding: 12px 16px;
  background: var(--accent-faded);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-primary);
}

.modal-note strong {
  color: var(--accent);
}

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

button:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible) {
  outline: none;
}

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

/* ===========================================
   Phase 2: Logo & Design Options
   =========================================== */

/* Hidden utility */
.hidden {
  display: none !important;
}

/* Field hint text */
.field-hint {
  font-size: 13px;
  color: var(--text-muted);
  margin: 6px 0 0 0;
}

/* Inline Tabs (for Logo section) */
.tabs-inline {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
}

.tab-inline {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.tab-inline.active {
  background: var(--accent);
  color: #ffffff;
}

.tab-inline:hover:not(.active) {
  background: var(--border);
}

/* Logo Tab Content */
.logo-tab-content {
  margin-bottom: 16px;
}

/* File Upload */
.file-upload-wrapper {
  position: relative;
}

.file-input {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 2;
}

.file-upload-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg-tertiary);
  border: 2px dashed var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.file-upload-wrapper:hover .file-upload-label,
.file-input:focus + .file-upload-label {
  border-color: var(--accent);
  background: var(--accent-faded);
}

.file-upload-icon {
  font-size: 24px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.file-upload-text {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Logo Preview */
.logo-preview-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  padding: 12px;
  background: var(--bg-tertiary);
  border-radius: 8px;
}

.logo-preview-img {
  max-width: 100px;
  max-height: 60px;
  object-fit: contain;
}

.logo-remove-btn {
  width: 28px;
  height: 28px;
  padding: 0;
  background: var(--error);
  border: none;
  border-radius: 6px;
  color: #ffffff;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  transition: background 0.2s;
}

.logo-remove-btn:hover {
  background: #c82333;
}

/* Logo Options */
.logo-options {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.option-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

/* Toggle Group */
.toggle-group {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: 6px;
  padding: 3px;
}

.toggle-btn {
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.toggle-btn.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
  box-shadow: 0 1px 2px var(--shadow);
}

.toggle-btn:hover:not(.active) {
  color: var(--text-primary);
}

/* Collapsible Section */
.section-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
}

.section-toggle .section-header {
  margin-bottom: 0;
  pointer-events: none;
}

.toggle-icon {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: transform 0.2s;
}

.section-toggle[aria-expanded="true"] .toggle-icon {
  transform: rotate(45deg);
}

.collapsible-content {
  padding-top: 16px;
}

/* Design Grid */
.design-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

@media (max-width: 500px) {
  .design-grid {
    grid-template-columns: 1fr;
  }
}

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

/* Color Picker */
.color-picker-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-picker {
  width: 40px;
  height: 40px;
  padding: 0;
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  overflow: hidden;
  background: transparent;
}

.color-picker::-webkit-color-swatch-wrapper {
  padding: 2px;
}

.color-picker::-webkit-color-swatch {
  border: none;
  border-radius: 4px;
}

.color-picker::-moz-color-swatch {
  border: none;
  border-radius: 4px;
}

.color-value {
  font-size: 13px;
  font-family: 'SF Mono', Monaco, 'Courier New', monospace;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.color-value-input {
  width: 80px;
  padding: 6px 8px;
  font-size: 13px;
  font-family: 'SF Mono', Monaco, 'Courier New', monospace;
  text-transform: uppercase;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.color-value-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-faded);
}

.color-value-input.invalid {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.15);
}

/* Background Option */
.background-option {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1.4;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--accent);
  flex-shrink: 0;
}

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

.background-color-wrapper {
  margin-top: 12px;
  padding-left: 28px;
}

.background-color-wrapper.hidden {
  display: none;
}

.background-color-wrapper label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}

/* Contrast Warning */
.contrast-warning {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  margin: 16px 0;
  background: #fff3cd;
  border: 1px solid #ffc107;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.4;
  color: #856404;
}

.contrast-warning.hidden {
  display: none;
}

.warning-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.warning-text {
  flex: 1;
}

[data-theme="dark"] .contrast-warning {
  background: #332b00;
  border-color: #665500;
  color: #ffc107;
}

/* Separator Group */
.separator-group {
  margin-bottom: 16px;
}

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

.separator-group select {
  max-width: 200px;
}

/* Reset Button */
.btn-reset {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.btn-reset:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* ===========================================
   Phase 4: Bulk Creator
   =========================================== */

/* Mode Tabs */
.mode-tabs {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 24px;
  max-width: 320px;
}

.mode-tab {
  flex: 1;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.mode-tab.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
  box-shadow: 0 2px 6px var(--shadow);
}

.mode-tab:hover:not(.active) {
  color: var(--text-primary);
}

/* Mode Panels */
.mode-panel {
  display: none;
}

.mode-panel.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Step Indicator */
.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 32px;
  gap: 0;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
}

.step-number {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border: 2px solid var(--border);
  border-radius: 50%;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.step.active .step-number,
.step.completed .step-number {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

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

.step-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
  transition: color 0.2s;
}

.step.active .step-label {
  color: var(--text-primary);
}

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

.step-connector {
  width: 60px;
  height: 2px;
  background: var(--border);
  margin: 0 8px;
  margin-bottom: 24px;
  transition: background 0.2s;
}

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

@media (max-width: 600px) {
  .step-label {
    font-size: 11px;
  }
  .step-connector {
    width: 30px;
  }
  .step-number {
    width: 32px;
    height: 32px;
    font-size: 13px;
  }
}

/* Bulk Steps */
.bulk-step {
  display: none;
}

.bulk-step.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

/* Bulk Layout (Step 1) */
.bulk-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

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

.bulk-form {
  overflow: visible;
}

.bulk-section-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 8px 0;
}

.bulk-section-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 20px 0;
}

.subsection-header {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 12px 0;
}

/* Bulk Preview */
.bulk-preview {
  position: sticky;
  top: 24px;
}

.bulk-preview .preview-container {
  margin-bottom: 16px;
}

/* Bulk Navigation */
.bulk-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.bulk-nav .btn-primary,
.bulk-nav .btn-secondary {
  min-width: 140px;
}

/* Import Options (Step 2) */
.bulk-import {
  max-width: 800px;
  margin: 0 auto;
}

.import-options {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 768px) {
  .import-options {
    grid-template-columns: 1fr;
  }
}

.import-option {
  padding: 20px;
  background: var(--bg-tertiary);
  border-radius: 10px;
}

.import-option .subsection-header {
  margin-bottom: 16px;
}

.import-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 0;
}

.import-divider span {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 20px;
}

@media (max-width: 768px) {
  .import-divider {
    padding: 8px 0;
  }
}

/* Paste Textarea */
.paste-textarea {
  width: 100%;
  min-height: 160px;
  padding: 12px;
  font-family: 'SF Mono', Monaco, 'Courier New', monospace;
  font-size: 13px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  resize: vertical;
}

.paste-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-faded);
}

/* Import Results */
.import-results {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.import-success {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(40, 167, 69, 0.1);
  border: 1px solid var(--success);
  border-radius: 8px;
  margin-bottom: 16px;
}

.success-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--success);
  color: #ffffff;
  border-radius: 50%;
  font-size: 14px;
  font-weight: bold;
}

.success-text {
  font-size: 14px;
  color: var(--text-primary);
}

/* Import Preview Table */
.import-preview-table {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.import-preview-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.import-preview-table th,
.import-preview-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.import-preview-table th {
  background: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-primary);
  position: sticky;
  top: 0;
}

.import-preview-table td {
  color: var(--text-secondary);
}

.import-preview-table tr:last-child td {
  border-bottom: none;
}

.import-preview-table tr:hover td {
  background: var(--accent-faded);
}

/* Import Error */
.import-error {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(220, 53, 69, 0.1);
  border: 1px solid var(--error);
  border-radius: 8px;
  margin-top: 16px;
}

.error-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--error);
  color: #ffffff;
  border-radius: 50%;
  font-size: 14px;
  font-weight: bold;
}

.error-text {
  font-size: 14px;
  color: var(--error);
}

/* Export Section (Step 3) */
.bulk-export {
  max-width: 1200px;
  margin: 0 auto;
}

.export-header {
  margin-bottom: 24px;
}

.export-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.export-info {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

.export-search {
  flex: 1;
  min-width: 200px;
  max-width: 300px;
}

.search-input {
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
}

.search-input:focus {
  outline: none;
  border-color: var(--border-focus);
  background: var(--bg-secondary);
}

.export-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Signature Grid */
.signature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

@media (max-width: 600px) {
  .signature-grid {
    grid-template-columns: 1fr;
  }
}

/* Signature Card */
.signature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.signature-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px var(--shadow-hover);
}

.signature-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
}

.signature-card-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.signature-card-actions {
  display: flex;
  gap: 8px;
}

.card-action-btn {
  width: 32px;
  height: 32px;
  padding: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.card-action-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.signature-card-content {
  padding: 16px;
  font-family: Arial, sans-serif;
  font-size: 14px;
  line-height: 1.4;
  /* Explicit white background for signature preview area */
  background: #ffffff !important;
}

.signature-card.dark-bg .signature-card-content {
  background: #1a1a2e !important;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-state-text {
  font-size: 16px;
  margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 16px;
  }

  .card {
    padding: 16px;
  }

  .preview-panel {
    position: static;
  }

  .action-buttons {
    flex-direction: column;
  }

  .btn-secondary {
    order: 1;
  }

  .logo-options {
    flex-direction: column;
    gap: 16px;
  }

  .bulk-preview {
    position: static;
  }

  .bulk-nav {
    flex-direction: column;
    gap: 12px;
  }

  .bulk-nav .btn-primary,
  .bulk-nav .btn-secondary,
  .bulk-nav .btn-reset {
    width: 100%;
    min-width: auto;
  }

  .export-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .export-search {
    max-width: none;
  }

  .export-actions {
    flex-direction: column;
  }

  .export-actions .btn-primary,
  .export-actions .btn-secondary {
    width: 100%;
  }

  /* Improve touch targets on mobile */
  .btn-primary,
  .btn-secondary,
  .btn-reset {
    min-height: 48px;
    padding: 14px 24px;
  }

  .toggle-btn {
    min-height: 44px;
    padding: 10px 16px;
  }

  .tab,
  .tab-inline {
    min-height: 44px;
    padding: 12px 16px;
  }

  .mode-tab {
    min-height: 48px;
  }

  .clear-button {
    width: 28px;
    height: 28px;
    font-size: 18px;
  }

  .theme-toggle {
    width: 48px;
    height: 48px;
  }

  .modal-close {
    width: 44px;
    height: 44px;
    font-size: 24px;
  }

  .card-action-btn {
    width: 40px;
    height: 40px;
  }

  .preview-bg-btn {
    min-height: 44px;
    padding: 12px 16px;
  }

  /* Modal improvements for mobile */
  .modal {
    padding: 20px;
    width: 95%;
    max-height: 90vh;
    border-radius: 12px;
  }

  .modal-header h2 {
    font-size: 18px;
  }

  .tabs {
    flex-wrap: wrap;
    gap: 4px;
  }

  .tab {
    flex: 1 1 auto;
    white-space: nowrap;
  }

  /* Better spacing for mobile form */
  .form-section {
    margin-bottom: 20px;
  }

  .section-header {
    font-size: 16px;
  }

  .form-group {
    margin-bottom: 14px;
  }

  /* Title adjustments */
  .title {
    font-size: 22px;
  }

  .subtitle {
    font-size: 14px;
  }
}

/* Extra small screens */
@media (max-width: 400px) {
  .container {
    padding: 12px;
  }

  .card {
    padding: 14px;
  }

  .title {
    font-size: 20px;
  }

  .step-indicator {
    gap: 0;
    justify-content: space-between;
  }

  .step-connector {
    width: 16px;
  }

  .step-label {
    font-size: 10px;
  }

  .import-options {
    gap: 16px;
  }

  .mode-tabs {
    max-width: 100%;
  }
}