/* ========== Reset & Base ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Corporate Color Palette */
  --primary-900: #0f172a;
  --primary-800: #1e293b;
  --primary-700: #334155;
  --primary-600: #475569;
  --primary-500: #64748b;
  --primary-400: #94a3b8;
  --primary-300: #cbd5e1;
  --primary-200: #e2e8f0;
  --primary-100: #f1f5f9;
  --primary-50: #f8fafc;
  
  --accent-700: #0369a1;
  --accent-600: #0284c7;
  --accent-500: #0ea5e9;
  --accent-400: #38bdf8;
  --accent-100: #e0f2fe;
  
  --success-600: #059669;
  --success-500: #10b981;
  --success-100: #d1fae5;
  
  --warning-700: #b45309;
  --warning-600: #d97706;
  --warning-500: #f59e0b;
  --warning-100: #fef3c7;
  
  --danger-600: #dc2626;
  --danger-500: #ef4444;
  --danger-100: #fee2e2;
  
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  --bg-page: #f1f5f9;
  --bg-card: #ffffff;
  --border-color: #e2e8f0;
  --border-dark: #cbd5e1;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-page);
  min-height: 100vh;
  color: var(--text-primary);
  padding-top: 64px; /* Space for fixed nav */
  line-height: 1.5;
}

/* ========== Top Navigation Bar ========== */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--primary-900);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  z-index: 1000;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: white;
  font-weight: 600;
  font-size: 1.25rem;
  transition: opacity 0.2s;
  letter-spacing: -0.025em;
}

.nav-brand:hover {
  opacity: 0.9;
}

.brand-icon {
  font-size: 1.4rem;
}

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  color: var(--primary-300);
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.875rem;
  transition: all 0.15s ease;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: white;
}

.nav-link.active {
  background: var(--accent-600);
  color: white;
}

.nav-icon {
  font-size: 1rem;
}

/* Recent Projects Dropdown */
.nav-actions {
  display: flex;
  align-items: center;
}

.recent-projects-dropdown {
  position: relative;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: transparent;
  border: 1px solid var(--primary-600);
  border-radius: 6px;
  color: var(--primary-300);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.dropdown-toggle:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--primary-500);
  color: white;
}

.dropdown-arrow {
  font-size: 0.6rem;
  transition: transform 0.2s;
}

.dropdown-toggle.open .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 300px;
  background: var(--bg-card);
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12), 0 0 0 1px var(--border-color);
  overflow: hidden;
  animation: dropdownSlide 0.15s ease-out;
}

@keyframes dropdownSlide {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.dropdown-header {
  padding: 12px 16px;
  background: var(--primary-50);
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.dropdown-list {
  max-height: 320px;
  overflow-y: auto;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  text-decoration: none;
  color: var(--text-primary);
  transition: background 0.15s;
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
}

.dropdown-item:last-child {
  border-bottom: none;
}

.dropdown-item:hover {
  background: var(--primary-50);
}

.dropdown-item-thumb {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background: var(--primary-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-500);
  font-size: 1.1rem;
  overflow: hidden;
  flex-shrink: 0;
}

.dropdown-item-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.dropdown-item-info {
  flex: 1;
  min-width: 0;
}

.dropdown-item-name {
  font-weight: 500;
  font-size: 0.875rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}

.dropdown-item-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.dropdown-empty {
  padding: 24px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.dropdown-footer {
  display: block;
  padding: 12px 16px;
  text-align: center;
  background: var(--primary-50);
  color: var(--accent-600);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.813rem;
  border-top: 1px solid var(--border-color);
  transition: background 0.15s;
}

.dropdown-footer:hover {
  background: var(--primary-100);
}

/* ========== App Container & Pages ========== */
.app-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px;
}

.page {
  animation: fadeIn 0.2s ease-out;
}

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

.page-header {
  text-align: left;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  letter-spacing: -0.025em;
}

.page-header p {
  font-size: 0.938rem;
  color: var(--text-secondary);
}

/* ========== Wizard Stepper ========== */
.wizard-stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  padding: 16px 24px;
  background: var(--bg-card);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

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

.step-indicator {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-100);
  border: 2px solid var(--border-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: all 0.2s ease;
  position: relative;
}

.step-check {
  display: none;
}

.step.active .step-indicator {
  background: var(--accent-600);
  border-color: var(--accent-600);
  color: white;
}

.step.completed .step-indicator {
  background: var(--success-500);
  border-color: var(--success-500);
  color: white;
}

.step.completed .step-number {
  display: none;
}

.step.completed .step-check {
  display: block;
}

.step-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-align: center;
  max-width: 100px;
  transition: color 0.2s;
}

.step.active .step-label {
  color: var(--accent-600);
  font-weight: 600;
}

.step.completed .step-label {
  color: var(--success-600);
}

.step-line {
  flex: 1;
  height: 2px;
  background: var(--border-dark);
  margin: 0 12px;
  margin-bottom: 28px;
  border-radius: 1px;
  transition: background 0.2s;
  min-width: 40px;
  max-width: 80px;
}

.step-line.completed {
  background: var(--success-500);
}

/* ========== Wizard Step Content ========== */
.wizard-step-content {
  animation: stepFadeIn 0.2s ease-out;
}

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

.step-description {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 0.938rem;
}

.step-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.step-actions-right {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-left: auto;
}

.btn-back {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-dark);
}

.btn-back:hover {
  background: var(--primary-50);
  border-color: var(--primary-400);
}

.btn-next {
  min-width: 180px;
}

/* ========== Cards ========== */
.card {
  background: var(--bg-card);
  border-radius: 8px;
  padding: 24px;
  border: 1px solid var(--border-color);
  margin-bottom: 16px;
}

.card h2 {
  margin-bottom: 8px;
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card h3 {
  margin: 20px 0 10px;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
}

/* ========== Home Page ========== */
.home-hero {
  text-align: center;
  padding: 48px 0;
}

.home-hero h1 {
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.home-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 800px;
  margin: 0 auto 48px;
}

.home-options.single-option {
  grid-template-columns: 1fr;
  max-width: 500px;
}

.home-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 24px;
  background: var(--bg-card);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.home-card:hover {
  border-color: var(--accent-400);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.home-card-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  width: 48px;
  height: 48px;
  background: var(--primary-50);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.home-card h2 {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-weight: 600;
}

.home-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: 16px;
  text-align: left;
}

.home-card-action {
  color: var(--accent-600);
  font-weight: 500;
  font-size: 0.875rem;
}

.home-recent {
  background: var(--bg-card);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  padding: 24px;
  max-width: 600px;
  margin: 0 auto;
}

.home-recent h3 {
  color: var(--text-primary);
  margin-bottom: 16px;
  font-size: 1rem;
  font-weight: 600;
}

.home-recent-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.home-recent-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--primary-50);
  border-radius: 6px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.15s;
}

.home-recent-item:hover {
  background: var(--primary-100);
}

.view-all-link {
  color: var(--accent-600);
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: none;
}

.view-all-link:hover {
  text-decoration: underline;
}

/* ========== Projects Page ========== */
.projects-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding: 12px 16px;
  background: var(--bg-card);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.projects-filters {
  display: flex;
  gap: 12px;
}

.projects-filters select {
  padding: 8px 12px;
  border: 1px solid var(--border-dark);
  border-radius: 6px;
  font-size: 0.875rem;
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color 0.15s;
}

.projects-filters select:focus {
  outline: none;
  border-color: var(--accent-500);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.project-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: all 0.2s ease;
  cursor: pointer;
}

.project-card:hover {
  border-color: var(--accent-400);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.project-card-thumb {
  height: 140px;
  background: var(--primary-100);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card-thumb .no-thumb {
  font-size: 2.5rem;
  color: var(--primary-400);
}

.project-card-body {
  padding: 16px;
}

.project-card-name {
  font-size: 0.938rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-card-meta {
  font-size: 0.813rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.project-card-status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.688rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.project-card-status.completed {
  background: var(--success-100);
  color: var(--success-600);
}

.project-card-status.processing {
  background: var(--warning-100);
  color: var(--warning-600);
}

.project-card-status.frames_ready {
  background: var(--accent-100);
  color: var(--accent-700);
}

.project-card-status.error {
  background: var(--danger-100);
  color: var(--danger-600);
}

.project-card-actions {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  background: var(--primary-50);
}

.project-card-actions button {
  flex: 1;
  padding: 8px;
  font-size: 0.813rem;
}

/* ========== Drop Zone ========== */
.drop-zone {
  border: 2px dashed var(--border-dark);
  border-radius: 8px;
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--primary-50);
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent-500);
  background: var(--accent-100);
}

.upload-icon {
  color: var(--primary-400);
  margin-bottom: 16px;
}

.drop-zone p {
  font-size: 0.938rem;
  color: var(--text-secondary);
  margin: 8px 0;
}

.drop-zone .subtitle {
  font-size: 0.813rem;
  color: var(--text-muted);
}

/* ========== Preview ========== */
.preview-container {
  text-align: center;
  margin: 20px 0;
}

.preview-container img {
  max-width: 400px;
  max-height: 400px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  margin-bottom: 15px;
}

.preview-container video {
  max-width: 100%;
  max-height: 400px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.video-info {
  margin-top: 10px;
  color: #666;
  font-size: 0.9rem;
}

/* ========== Option Groups ========== */
.option-group {
  margin: 20px 0;
  padding: 16px;
  background: var(--primary-50);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.option-group > label {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-size: 0.875rem;
}

.option-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  font-size: 0.875rem;
  font-family: inherit;
  resize: vertical;
  transition: border-color 0.15s ease;
  color: var(--text-primary);
}

.option-group textarea:focus {
  outline: none;
  border-color: var(--accent-500);
}

.option-group input[type="text"] {
  width: 100%;
  max-width: 300px;
  padding: 8px 12px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  font-size: 0.875rem;
  transition: border-color 0.15s;
  color: var(--text-primary);
}

.option-group input[type="text"]:focus {
  outline: none;
  border-color: var(--accent-500);
}

.option-desc {
  font-size: 0.813rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ========== Checkbox & Radio Labels ========== */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  padding: 10px 12px;
  background: var(--bg-card);
  border-radius: 6px;
  border: 1px solid var(--border-color);
  transition: background 0.15s;
}

.checkbox-label:hover {
  background: var(--primary-50);
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--accent-600);
}

.checkbox-label span {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-primary);
}

.radio-label {
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
  flex: 1;
  min-width: 140px;
}

.radio-label:hover {
  border-color: var(--accent-400);
}

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

.radio-label:has(input:checked) {
  border-color: var(--accent-600);
  background: var(--accent-100);
}

.radio-label span {
  font-weight: 600;
  font-size: 0.938rem;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.radio-label:has(input:checked) span {
  color: var(--accent-700);
}

.radio-label small {
  color: var(--text-muted);
  font-size: 0.813rem;
}

.radio-label:has(input:checked) small {
  color: var(--accent-600);
}

.radio-label.small {
  padding: 8px 12px;
}

.radio-label.small span {
  font-size: 0.875rem;
}

.radio-label.small small {
  font-size: 0.75rem;
}

/* ========== Duration Selector ========== */
.duration-selector {
  display: flex;
  gap: 8px;
  margin: 12px 0;
  flex-wrap: wrap;
}

.duration-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
  flex: 1;
  min-width: 90px;
  text-align: center;
}

.duration-option:hover {
  border-color: var(--accent-400);
}

.duration-option input[type="radio"] {
  display: none;
}

.duration-option span {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
}

.duration-option small {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: 2px;
}

.duration-option:has(input:checked) {
  border-color: var(--accent-600);
  background: var(--accent-100);
}

.duration-option:has(input:checked) span {
  color: var(--accent-700);
}

.duration-option:has(input:checked) small {
  color: var(--accent-600);
}

/* ========== Small Drop Zones ========== */
.drop-zone-small {
  border: 2px dashed var(--border-dark);
  border-radius: 6px;
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
  background: var(--bg-card);
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drop-zone-small:hover {
  border-color: var(--accent-500);
  background: var(--accent-100);
}

.drop-zone-small p {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.813rem;
}

/* ========== Reference Images ========== */
.reference-images-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
  margin-top: 15px;
}

.reference-slot {
  position: relative;
}

.ref-preview, .small-preview {
  position: relative;
  text-align: center;
}

.ref-preview img, .small-preview img {
  width: 100%;
  max-height: 120px;
  object-fit: contain;
  border-radius: 4px;
  border: 1px solid var(--border-dark);
}

.ref-name {
  width: 100%;
  margin-top: 8px;
  padding: 6px 8px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  font-size: 0.813rem;
  color: var(--text-primary);
}

.btn-small {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  background: var(--danger-500);
  color: white;
  cursor: pointer;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-small:hover {
  background: var(--danger-600);
}

/* ========== Background Removal Section ========== */
.bg-removal-section {
  border: 1px solid var(--border-color);
}

.bg-method-toggle {
  display: flex;
  gap: 12px;
  margin: 12px 0;
  flex-wrap: wrap;
}

.color-key-options {
  background: var(--bg-card);
  padding: 16px;
  border-radius: 6px;
  margin-top: 12px;
  border: 1px solid var(--border-color);
}

.color-mode-toggle {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
  padding: 10px;
  background: var(--primary-50);
  border-radius: 6px;
}

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
  margin-bottom: 15px;
}

.color-picker-row > label {
  min-width: 130px;
}

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

.color-picker-wrapper input[type="color"] {
  width: 50px;
  height: 40px;
  border: 2px solid #ddd;
  border-radius: 8px;
  cursor: pointer;
  padding: 2px;
}

.color-picker-wrapper input[type="text"] {
  width: 90px;
  padding: 8px 12px;
  border: 2px solid #ddd;
  border-radius: 6px;
  font-family: monospace;
  font-size: 1rem;
  text-transform: uppercase;
}

.color-presets {
  display: flex;
  gap: 6px;
}

.color-preset {
  width: 28px;
  height: 28px;
  border: 2px solid var(--border-dark);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.color-preset:hover {
  transform: scale(1.1);
  border-color: var(--accent-400);
}

.color-preset.active {
  border-color: var(--accent-600);
  box-shadow: 0 0 0 2px var(--accent-100);
}

.tolerance-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.tolerance-row label {
  min-width: 120px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.tolerance-row input[type="range"] {
  flex: 1;
  min-width: 150px;
  max-width: 280px;
  accent-color: var(--accent-600);
}

.tolerance-row span {
  font-weight: 600;
  color: var(--accent-600);
  min-width: 30px;
  font-size: 0.875rem;
}

/* ========== Buttons ========== */
.btn-primary,
.btn-secondary {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-primary {
  background: var(--accent-600);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-700);
}

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

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-dark);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--primary-50);
  border-color: var(--primary-400);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.75rem;
}

.btn-danger {
  background: var(--danger-600);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 0.15s;
}

.btn-danger:hover {
  background: var(--danger-500);
}

.btn-danger:disabled {
  background: var(--primary-400);
  cursor: not-allowed;
}

/* ========== Progress ========== */
.progress-container {
  margin: 16px 0;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--primary-100);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 12px;
}

.progress-fill {
  height: 100%;
  background: var(--accent-500);
  transition: width 0.3s ease;
  width: 0%;
}

/* Spinning cog indicator */
.spinner-cog {
  display: inline-block;
  animation: spin 2s linear infinite;
  margin-right: 8px;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Animated processing dots */
.processing-dots::after {
  content: '';
  animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
  0%, 20% { content: ''; }
  40% { content: '.'; }
  60% { content: '..'; }
  80%, 100% { content: '...'; }
}

.status-messages {
  margin-top: 16px;
  padding: 12px;
  background: var(--primary-50);
  border-radius: 6px;
  border: 1px solid var(--border-color);
  max-height: 200px;
  overflow-y: auto;
}

.status-message {
  padding: 8px 12px;
  margin: 4px 0;
  border-left: 3px solid var(--accent-500);
  background: var(--bg-card);
  border-radius: 4px;
  font-size: 0.813rem;
  color: var(--text-secondary);
}

/* ========== Canvas/Preview ========== */
.canvas-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
  background: repeating-conic-gradient(#e2e8f0 0% 25%, #f8fafc 0% 50%) 50% / 16px 16px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  margin-bottom: 16px;
  position: relative;
}

.canvas-container canvas {
  border-radius: 6px;
}

.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 16px 0;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: var(--primary-50);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.controls label {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.controls input[type="range"] {
  width: 150px;
  accent-color: var(--accent-600);
}

.controls span {
  font-weight: 600;
  color: var(--accent-600);
  min-width: 50px;
  font-size: 0.875rem;
}

/* ========== Download Section ========== */
.download-section {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.download-section h3 {
  text-align: left;
  margin-bottom: 16px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.download-buttons {
  display: flex;
  justify-content: flex-start;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.export-buttons-row {
  display: flex;
  justify-content: flex-start;
  gap: 10px;
  flex-wrap: wrap;
  align-items: flex-start;
}

/* ========== GIF Export ========== */
.gif-export-section,
.spritesheet-export-section {
  display: flex;
  justify-content: flex-start;
  position: relative;
}

.gif-options {
  position: absolute;
  bottom: 100%;
  left: 0;
  margin-bottom: 8px;
  padding: 16px;
  background: var(--bg-card);
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  border: 1px solid var(--border-color);
  z-index: 100;
  min-width: 320px;
}

.gif-options::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 24px;
  width: 14px;
  height: 14px;
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  transform: rotate(45deg);
}

.gif-presets {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.gif-presets label {
  font-weight: 500;
  font-size: 0.813rem;
  color: var(--text-secondary);
}

.preset-btn {
  padding: 5px 12px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  background: var(--bg-card);
  cursor: pointer;
  font-size: 0.813rem;
  transition: all 0.15s;
  color: var(--text-primary);
}

.preset-btn:hover {
  border-color: var(--accent-500);
  background: var(--accent-100);
}

.preset-btn.active {
  border-color: var(--accent-600);
  background: var(--accent-600);
  color: white;
}

.gif-setting {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.gif-setting label {
  min-width: 100px;
  font-size: 0.813rem;
  color: var(--text-secondary);
}

.gif-setting input[type="number"] {
  width: 80px;
  padding: 6px 10px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  font-size: 0.875rem;
  color: var(--text-primary);
}

.gif-setting input[type="number"]:focus {
  outline: none;
  border-color: var(--accent-500);
}

.gif-setting select {
  padding: 6px 10px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  font-size: 0.875rem;
  background: var(--bg-card);
  color: var(--text-primary);
}

.gif-setting select:focus {
  outline: none;
  border-color: var(--accent-500);
}

.setting-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.gif-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

.size-estimate {
  font-size: 0.813rem;
  color: var(--text-muted);
}

.size-result {
  padding: 6px 10px;
  background: var(--success-100);
  border-radius: 4px;
  color: var(--success-600);
  font-weight: 500;
  font-size: 0.813rem;
}

/* ========== Frame Review Section ========== */
.detected-color-section {
  margin-bottom: 20px;
  padding: 16px;
  background: var(--primary-50);
  border-radius: 6px;
  border-left: 3px solid var(--accent-500);
}

.detected-color-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.color-swatch {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  border: 2px solid var(--primary-300);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.color-note {
  color: var(--text-muted);
  font-size: 0.813rem;
  font-style: italic;
}

.frame-preview-section {
  margin-bottom: 20px;
}

.frame-preview-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  padding: 12px;
  background: var(--primary-50);
  border-radius: 6px;
  border: 1px solid var(--border-color);
  max-height: 200px;
  overflow-y: auto;
}

.frame-preview-item {
  position: relative;
  aspect-ratio: 1;
  background: repeating-conic-gradient(#e2e8f0 0% 25%, #fff 0% 50%) 50% / 10px 10px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.frame-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.frame-preview-item span {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--primary-800);
  color: white;
  font-size: 0.688rem;
  text-align: center;
  padding: 2px;
}

.review-settings {
  margin-bottom: 20px;
  padding: 16px;
  background: var(--primary-50);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.review-method-toggle {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.review-color-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.review-color-mode {
  display: flex;
  gap: 12px;
}

.review-color-picker {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-color-picker input[type="color"] {
  width: 44px;
  height: 32px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  cursor: pointer;
}

.review-color-picker input[type="text"] {
  width: 100px;
  padding: 6px 8px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  font-family: ui-monospace, monospace;
  font-size: 0.813rem;
  color: var(--text-primary);
}

.review-tolerance {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-tolerance input[type="range"] {
  flex: 1;
  max-width: 200px;
  accent-color: var(--accent-600);
}

.review-output {
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-output input {
  padding: 6px 10px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  width: 200px;
  font-size: 0.875rem;
  color: var(--text-primary);
}

/* ========== Frame Editor ========== */
.reprocess-settings {
  margin-bottom: 16px;
  padding: 16px;
  background: var(--primary-50);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.reprocess-settings h3 {
  margin: 0 0 12px 0;
  font-size: 0.938rem;
  font-weight: 600;
  color: var(--text-primary);
}

.reprocess-options-grid {
  display: flex;
  gap: 32px;
}

.reprocess-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.reprocess-label {
  font-size: 0.813rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.reprocess-color-input {
  display: flex;
  align-items: center;
  gap: 8px;
}

.reprocess-color-input input[type="color"] {
  width: 36px;
  height: 36px;
  padding: 2px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  cursor: pointer;
}

.reprocess-color-input input[type="text"] {
  width: 80px;
  padding: 8px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  font-size: 0.875rem;
  font-family: monospace;
  text-transform: uppercase;
}

.reprocess-tolerance-input {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reprocess-tolerance-input input[type="range"] {
  width: 150px;
  height: 6px;
  accent-color: var(--accent-500);
}

.reprocess-tolerance-input span {
  min-width: 28px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.crop-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.frame-editor-controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
  padding: 16px;
  background: var(--primary-50);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.frame-controls-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.frame-range {
  display: flex;
  align-items: center;
  gap: 10px;
}

.frame-range label {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.frame-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.frame-actions-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.frame-input {
  width: 70px;
  padding: 6px 10px;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-primary);
}

.frame-input:focus {
  outline: none;
  border-color: var(--accent-500);
}

.frame-actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
  flex-wrap: wrap;
}

.frame-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 8px;
  max-height: 500px;
  overflow-y: auto;
  padding: 12px;
  background: var(--primary-50);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.frame-item {
  position: relative;
  aspect-ratio: 1;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.15s;
}

.frame-item:hover {
  border-color: var(--accent-400);
}

.frame-item.selected {
  border-color: var(--accent-600);
  box-shadow: 0 0 0 2px var(--accent-100);
}

.frame-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: repeating-conic-gradient(#e2e8f0 0% 25%, #fff 0% 50%) 50% / 16px 16px;
}

.frame-item .frame-number {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--primary-800);
  color: white;
  font-size: 0.688rem;
  padding: 2px 6px;
  text-align: center;
}

.frame-item.processing::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--accent-500);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.frame-item.disabled {
  opacity: 0.4;
  border-color: var(--primary-300);
}

.frame-item.disabled.selected {
  border-color: var(--accent-600);
  box-shadow: 0 0 0 2px var(--accent-100);
  opacity: 0.5;
}

.frame-item.disabled::before {
  content: '✕';
  position: absolute;
  top: 4px;
  right: 4px;
  width: 18px;
  height: 18px;
  background: var(--danger-500);
  color: white;
  font-size: 0.625rem;
  font-weight: bold;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.frame-item.disabled .frame-number {
  background: var(--primary-500);
}

/* ========== Crop Controls ========== */
.crop-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  margin: 16px 0;
  background: var(--primary-50);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.crop-status {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-card);
  border-radius: 4px;
  font-size: 0.813rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.crop-indicator {
  font-size: 1rem;
}

.crop-indicator.cropped {
  color: var(--success-500);
}

.crop-indicator.not-cropped {
  color: var(--text-muted);
}

/* ========== API Key Warning ========== */
.api-key-warning {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding: 12px 16px;
  background: var(--warning-100);
  border-radius: 6px;
  border: 1px solid var(--warning-500);
  border-left: 3px solid var(--warning-600);
}

.api-key-warning.error {
  background: var(--danger-100);
  border-color: var(--danger-500);
  border-left-color: var(--danger-600);
}

.api-key-warning .warning-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.api-key-warning span {
  flex: 1;
  color: var(--warning-700);
  font-size: 0.875rem;
}

.api-key-warning.error span {
  color: var(--danger-600);
}

.api-key-link {
  padding: 6px 14px;
  background: var(--bg-card);
  color: var(--accent-600);
  text-decoration: none;
  border-radius: 4px;
  font-weight: 500;
  font-size: 0.813rem;
  white-space: nowrap;
  transition: all 0.15s;
  border: 1px solid var(--accent-600);
}

.api-key-link:hover {
  background: var(--accent-600);
  color: white;
}

/* ========== Modal ========== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--bg-card);
  padding: 24px;
  border-radius: 8px;
  max-width: 400px;
  width: 90%;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.modal-content h3 {
  margin-top: 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-content .warning-text {
  color: var(--danger-600);
  font-size: 0.875rem;
  margin: 12px 0;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 20px;
}

.modal-actions button {
  min-width: 100px;
}

/* ========== Start New Project Button ========== */
.start-new-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.start-new-btn:hover {
  background: var(--bg-hover);
  border-color: var(--accent-600);
  color: var(--accent-600);
}

.start-new-btn:active {
  transform: scale(0.98);
}

.start-new-btn.hidden {
  display: none !important;
}

/* ========== Footer ========== */
footer {
  text-align: center;
  color: var(--text-muted);
  margin-top: 32px;
  padding: 20px;
  font-size: 0.813rem;
}

/* ========== Utility ========== */
.hidden {
  display: none !important;
}

.loading-text {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
  font-size: 0.875rem;
}

/* ========== Animations ========== */
@keyframes spin {
  to { transform: rotate(360deg); }
}

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

/* ========== Responsive ========== */
@media (max-width: 768px) {
  body {
    padding-top: 56px;
  }
  
  .top-nav {
    height: 56px;
  }
  
  .nav-brand {
    font-size: 1rem;
  }
  
  .brand-text {
    display: none;
  }
  
  .nav-link {
    padding: 6px 10px;
    font-size: 0.813rem;
  }
  
  .nav-link span:not(.nav-icon) {
    display: none;
  }
  
  .page-header h1 {
    font-size: 1.5rem;
  }
  
  .wizard-stepper {
    padding: 12px;
    flex-wrap: wrap;
    gap: 8px;
  }
  
  .step-label {
    font-size: 0.688rem;
  }
  
  .step-line {
    display: none;
  }
  
  .home-options {
    grid-template-columns: 1fr;
  }
  
  .home-hero h1 {
    font-size: 1.5rem;
  }
  
  .card {
    padding: 16px;
  }
  
  .preview-container img {
    max-width: 100%;
  }
  
  .controls {
    flex-direction: column;
  }
  
  .reference-images-container {
    grid-template-columns: 1fr;
  }
  
  .frame-editor-controls {
    gap: 12px;
  }
  
  .frame-controls-row {
    flex-direction: column;
    align-items: stretch;
  }
  
  .frame-tools {
    justify-content: flex-start;
    flex-wrap: wrap;
  }
  
  .frame-actions-row {
    flex-wrap: wrap;
  }
  
  .frame-actions-row button {
    flex: 1;
    min-width: 120px;
  }
  
  .frame-grid {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  }
  
  .step-actions {
    flex-direction: column;
  }
  
  .step-actions button {
    width: 100%;
  }
  
  .projects-toolbar {
    flex-direction: column;
    gap: 12px;
  }
  
  .projects-filters {
    width: 100%;
  }
  
  .projects-filters select {
    flex: 1;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .app-container {
    padding: 20px 16px;
  }
}

@media (max-width: 480px) {
  .nav-links {
    gap: 2px;
  }
  
  .nav-link {
    padding: 6px 8px;
  }
  
  .dropdown-toggle span:first-child {
    display: none;
  }
  
  .dropdown-menu {
    width: 260px;
  }
}