/* =============== CSS Variables - White Theme with Light Green =============== */
:root {
  --bg: #ffffff;
  --card: #ffffff;
  --card-solid: #ffffff;
  --card-hover: #fafafa;
  --text: #1a1a1a;
  --text-secondary: #555555;
  --text-muted: #888888;
  --border: #e0e0e0;
  --border-light: #f0f0f0;
  --primary: #8bc34a;
  --primary-hover: #7cb342;
  --primary-light: rgba(139, 195, 74, 0.12);
  --primary-glow: rgba(139, 195, 74, 0.25);
  --success: #4caf50;
  --success-light: rgba(76, 175, 80, 0.12);
  --error: #e53935;
  --error-light: rgba(229, 57, 53, 0.1);
  --warning: #ffc107;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --sidebar-width: 260px;
  --transition: 0.2s ease;
}

/* =============== Dark Theme =============== */
[data-theme="dark"] {
  --bg: #121212;
  --card: #1e1e1e;
  --card-solid: #1e1e1e;
  --card-hover: #252525;
  --text: #f5f5f5;
  --text-secondary: #b0b0b0;
  --text-muted: #808080;
  --border: #333333;
  --border-light: #2a2a2a;
  --primary: #aed581;
  --primary-hover: #8bc34a;
  --primary-light: rgba(174, 213, 129, 0.15);
  --primary-glow: rgba(174, 213, 129, 0.3);
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.4);
}


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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

/* =============== App Layout =============== */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* =============== Animated Background (disabled for white theme) =============== */
.animated-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--bg);
}

/* =============== Sidebar Navigation =============== */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  background: var(--card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--transition), background var(--transition);
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-light);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 18px;
  transition: transform var(--transition);
}

.logo:hover .logo-icon {
  transform: scale(1.05);
}


.logo-text h1 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.5px;
}

.logo-text span {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Sidebar Navigation */
.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 24px;
}

.nav-section-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0 12px;
  margin-bottom: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  transition: all var(--transition);
  position: relative;
}

.nav-item:hover {
  color: var(--text);
  background: var(--primary-light);
}

.nav-item.active {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-light);
}


.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
}

.theme-toggle:hover {
  background: var(--border);
}

.theme-toggle-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
}

.theme-toggle-label svg {
  width: 18px;
  height: 18px;
}

.theme-switch {
  width: 44px;
  height: 24px;
  background: var(--border);
  border-radius: 12px;
  position: relative;
  transition: background var(--transition);
}

.theme-switch::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  top: 3px;
  left: 3px;
  transition: transform var(--transition);
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

[data-theme="dark"] .theme-switch {
  background: var(--primary);
}

[data-theme="dark"] .theme-switch::after {
  transform: translateX(20px);
}

/* =============== Main Content =============== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  padding: 24px 32px;
  transition: margin var(--transition);
}

/* =============== Breadcrumbs =============== */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 13px;
}

.breadcrumb-item {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-item a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb-item a:hover {
  color: var(--primary);
}

.breadcrumb-item.active {
  color: var(--text);
  font-weight: 500;
}

.breadcrumb-separator {
  color: var(--text-muted);
}


/* =============== Page Header =============== */
.page-header {
  margin-bottom: 28px;
}

.page-header h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
  color: var(--text);
}

.page-header p {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 600px;
  line-height: 1.7;
}

/* =============== Pages =============== */
.page {
  display: none;
  animation: pageIn 0.3s ease;
}

.page.active {
  display: block;
}

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

/* =============== Cards =============== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  box-shadow: var(--shadow);
}

.card + .card {
  margin-top: 20px;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
}

.card-header h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-header h3 svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.card-header p {
  font-size: 13px;
  color: var(--text-secondary);
}

.card-body {
  padding: 24px;
}


/* =============== Form Elements =============== */
.form-group {
  margin-bottom: 20px;
}

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

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.form-label .optional {
  color: var(--text-muted);
  font-weight: 400;
  font-size: 12px;
}

.form-input, .form-select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text);
  background: var(--card-solid);
  transition: all var(--transition);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

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

/* =============== Grid Layouts =============== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* =============== Buttons =============== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

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

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

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

.btn-secondary:hover {
  background: var(--card-hover);
  border-color: var(--primary);
}

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

.btn-success:hover {
  opacity: 0.9;
}

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

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}


/* =============== Status Messages =============== */
.status {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.status-info {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(139, 195, 74, 0.25);
}

.status-success {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid rgba(76, 175, 80, 0.25);
}

.status-error {
  background: var(--error-light);
  color: var(--error);
  border: 1px solid rgba(229, 57, 53, 0.25);
}

/* =============== Split View Preview =============== */
.preview-container {
  position: relative;
}

.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.preview-tabs {
  display: flex;
  gap: 8px;
}

.preview-tab {
  padding: 10px 20px;
  border: 1px solid var(--border);
  background: var(--card-solid);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.preview-tab:hover {
  border-color: var(--primary);
  color: var(--text);
}

.preview-tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

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

.preview-action-btn {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  background: var(--card-solid);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.preview-action-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

.preview-action-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.preview-action-btn svg {
  width: 18px;
  height: 18px;
}


/* Single Preview Panel */
.preview-panel {
  display: none;
}

.preview-panel.active {
  display: block;
}

.preview-frame {
  width: 100%;
  height: 500px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-solid);
  overflow: hidden;
}

.preview-frame iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Split View */
.split-view {
  display: none;
  gap: 16px;
}

.split-view.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.split-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card-solid);
}

.split-panel-header {
  padding: 12px 16px;
  background: var(--border-light);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.split-panel-header .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.split-panel-header .dot.before {
  background: var(--text-muted);
}

.split-panel-header .dot.after {
  background: var(--success);
}

.split-panel iframe {
  width: 100%;
  height: 450px;
  border: none;
}

/* Fullscreen Preview */
.fullscreen-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 1000;
  display: none;
  flex-direction: column;
}

.fullscreen-overlay.active {
  display: flex;
}

.fullscreen-header {
  padding: 16px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.fullscreen-title {
  font-size: 16px;
  font-weight: 600;
}

.fullscreen-close {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.fullscreen-close:hover {
  background: var(--error-light);
  color: var(--error);
}

.fullscreen-content {
  flex: 1;
  padding: 24px;
  overflow: hidden;
}

.fullscreen-content iframe {
  width: 100%;
  height: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}


/* =============== Drag & Drop Zone =============== */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 24px;
  text-align: center;
  transition: all var(--transition);
  cursor: pointer;
  background: var(--border-light);
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--primary);
  background: var(--primary-light);
}

.drop-zone-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  color: var(--text-muted);
  transition: transform var(--transition), color var(--transition);
  pointer-events: none;
}

.drop-zone:hover .drop-zone-icon,
.drop-zone.drag-over .drop-zone-icon {
  color: var(--primary);
  transform: scale(1.1);
}

.drop-zone-text {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
  pointer-events: none;
}

.drop-zone-hint {
  font-size: 12px;
  color: var(--text-muted);
  pointer-events: none;
}

.drop-zone-file {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px 18px;
  background: var(--card-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-top: 16px;
}

.drop-zone-file.active {
  display: flex;
}

.drop-zone-file-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.drop-zone-file-size {
  font-size: 12px;
  color: var(--text-muted);
}

.drop-zone-file-remove {
  margin-left: auto;
  padding: 6px 12px;
  background: var(--error-light);
  color: var(--error);
  border: none;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.drop-zone-file-remove:hover {
  background: var(--error);
  color: white;
}

/* =============== Skeleton Loaders =============== */
.skeleton {
  background: var(--border-light);
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}

.skeleton-text {
  height: 16px;
  margin-bottom: 8px;
}

.skeleton-text:last-child {
  width: 60%;
}

.skeleton-image {
  height: 140px;
  border-radius: var(--radius-sm);
}

.skeleton-card {
  padding: 16px;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* Image Grid Skeleton */
.image-grid-skeleton {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.image-card-skeleton {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.image-card-skeleton .skeleton-image {
  border-radius: 0;
}

.image-card-skeleton .skeleton-meta {
  padding: 12px;
}


/* =============== Image Grid =============== */
.image-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 20px;
}

.image-toolbar-left,
.image-toolbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.counter-badge {
  padding: 10px 16px;
  background: var(--primary-light);
  border: 1px solid rgba(139, 195, 74, 0.2);
  border-radius: 20px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.image-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
}

.image-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--primary);
}

.image-card.selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.image-thumb {
  width: 100%;
  height: 150px;
  object-fit: cover;
  background: var(--border-light);
  transition: transform var(--transition);
}

.image-card:hover .image-thumb {
  transform: scale(1.02);
}

.image-meta {
  padding: 14px;
}

.image-filename {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 10px;
}

.image-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.image-badge {
  font-size: 11px;
  padding: 4px 10px;
  background: var(--border-light);
  border-radius: 6px;
  color: var(--text-secondary);
  font-weight: 500;
}

.image-checkbox {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}

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

.image-preview-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  background: rgba(0,0,0,0.6);
  border: none;
  border-radius: 8px;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition);
  z-index: 10;
}

.image-card:hover .image-preview-btn {
  opacity: 1;
  transform: scale(1);
}

.image-preview-btn:hover {
  background: var(--primary);
}

.image-preview-btn svg {
  width: 18px;
  height: 18px;
}


/* =============== Download Section =============== */
.download-section {
  display: flex;
  align-items: center;
  gap: 10px;
}

.download-section .form-input {
  width: 140px;
  padding: 10px 14px;
}

/* =============== Toast Notifications =============== */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 1001;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 400px;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease;
}

.toast.hiding {
  animation: toastOut 0.3s ease forwards;
}

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

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

.toast-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon { color: var(--error); }
.toast-info .toast-icon { color: var(--primary); }

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.toast-message {
  font-size: 13px;
  color: var(--text-secondary);
}

.toast-close {
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
  color: var(--text-muted);
  border-radius: 6px;
  transition: all var(--transition);
}

.toast-close:hover {
  background: var(--border-light);
  color: var(--text);
}


/* =============== Modal =============== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn 0.2s ease;
}

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

.modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  background: var(--card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.3s ease;
}

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

.modal-image {
  max-width: 100%;
  max-height: 75vh;
  display: block;
}

.modal-footer {
  padding: 18px 24px;
  background: var(--card);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.modal-info {
  font-size: 13px;
  color: var(--text-secondary);
}

.modal-info strong {
  color: var(--text);
  font-weight: 600;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  background: rgba(0,0,0,0.5);
  border: none;
  border-radius: 50%;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

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

/* =============== Progress Bar =============== */
.progress-container {
  margin-top: 16px;
  display: none;
}

.progress-container.active {
  display: block;
}

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

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

.progress-fill.indeterminate {
  width: 30%;
  animation: indeterminate 1.5s ease-in-out infinite;
}

@keyframes indeterminate {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(400%); }
}

.progress-text {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
  text-align: center;
}

/* =============== Spinner =============== */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.btn.loading {
  pointer-events: none;
}


/* =============== Form Validation =============== */
.form-group.error .form-input,
.form-group.error .form-select {
  border-color: var(--error);
}

.form-group.error .form-input:focus {
  box-shadow: 0 0 0 3px var(--error-light);
}

.form-error {
  display: none;
  font-size: 12px;
  color: var(--error);
  margin-top: 6px;
  align-items: center;
  gap: 6px;
}

.form-group.error .form-error {
  display: flex;
}

.form-error svg {
  width: 14px;
  height: 14px;
}

/* =============== Keyboard Hints =============== */
.kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 8px;
  background: var(--border-light);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 10px;
  font-family: monospace;
  color: var(--text-muted);
  margin-left: 8px;
}

/* =============== Responsive =============== */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .split-view.active {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .main-content {
    padding: 16px;
  }
  
  .page-header h2 {
    font-size: 22px;
  }
  
  .image-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .download-section {
    flex-direction: column;
    width: 100%;
  }
  
  .download-section .form-input {
    width: 100%;
  }
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 101;
  width: 44px;
  height: 44px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--text);
}

@media (max-width: 1024px) {
  .mobile-menu-btn {
    display: flex;
  }
}

/* Sidebar Overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
}

.sidebar-overlay.active {
  display: block;
}


/* =============== Tooltips =============== */
.tooltip {
  position: relative;
}

.tooltip::before,
.tooltip::after {
  position: absolute;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  z-index: 100;
  pointer-events: none;
}

.tooltip::before {
  content: attr(data-tooltip);
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 12px;
  background: var(--text);
  color: var(--bg);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.tooltip::after {
  content: '';
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--text);
}

.tooltip:hover::before,
.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
}

/* Tooltip positions */
.tooltip-bottom::before {
  bottom: auto;
  top: calc(100% + 8px);
}

.tooltip-bottom::after {
  bottom: auto;
  top: calc(100% + 2px);
  border-top-color: transparent;
  border-bottom-color: var(--text);
}

.tooltip-left::before {
  bottom: auto;
  left: auto;
  right: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
}

.tooltip-left::after {
  bottom: auto;
  left: auto;
  right: calc(100% + 2px);
  top: 50%;
  border-top-color: transparent;
  border-left-color: var(--text);
  transform: translateY(-50%);
}

/* =============== Step Indicator =============== */
.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
  padding: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.step {
  display: flex;
  align-items: center;
  gap: 12px;
}

.step-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--border-light);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.step-number svg {
  width: 16px;
  height: 16px;
}

.step.active .step-number {
  background: var(--primary);
  color: white;
}

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

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

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

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

.step-connector {
  width: 40px;
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  position: relative;
  overflow: hidden;
}

.step-connector::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 0%;
  background: var(--success);
  transition: width 0.5s ease;
}

.step-connector.completed::after {
  width: 100%;
}


/* =============== Success Animation =============== */
.success-overlay {
  position: fixed;
  inset: 0;
  background: rgba(139, 195, 74, 0.1);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  animation: successFadeIn 0.3s ease;
}

.success-overlay.active {
  display: flex;
}

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

.success-content {
  text-align: center;
  animation: successBounce 0.4s ease;
}

@keyframes successBounce {
  0% { transform: scale(0.8); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.success-icon {
  width: 80px;
  height: 80px;
  background: var(--success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: var(--shadow-lg);
}

.success-icon svg {
  width: 40px;
  height: 40px;
  color: white;
}

.success-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.success-message {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* Confetti effect */
.confetti {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  animation: confettiFall 3s ease-out forwards;
}

@keyframes confettiFall {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(400px) rotate(720deg);
    opacity: 0;
  }
}

/* =============== Error States =============== */
.error-state {
  padding: 40px 24px;
  text-align: center;
  background: var(--error-light);
  border: 1px solid rgba(229, 57, 53, 0.2);
  border-radius: var(--radius);
  margin-top: 16px;
}

.error-state-icon {
  width: 64px;
  height: 64px;
  background: rgba(229, 57, 53, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.error-state-icon svg {
  width: 32px;
  height: 32px;
  color: var(--error);
}

.error-state-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--error);
  margin-bottom: 8px;
}

.error-state-message {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.error-state-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.error-state .btn {
  min-width: 120px;
}

/* Inline error with action */
.inline-error {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: var(--error-light);
  border: 1px solid rgba(229, 57, 53, 0.3);
  border-radius: var(--radius-sm);
  margin-top: 16px;
}

.inline-error-icon {
  width: 40px;
  height: 40px;
  background: rgba(229, 57, 53, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.inline-error-icon svg {
  width: 20px;
  height: 20px;
  color: var(--error);
}

.inline-error-content {
  flex: 1;
}

.inline-error-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--error);
  margin-bottom: 2px;
}

.inline-error-message {
  font-size: 13px;
  color: var(--text-secondary);
}

.inline-error-action {
  padding: 8px 16px;
  background: var(--error);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.inline-error-action:hover {
  opacity: 0.9;
}


/* =============== Empty States =============== */
.empty-state {
  padding: 60px 24px;
  text-align: center;
}

.empty-state-illustration {
  width: 120px;
  height: 120px;
  margin: 0 auto 24px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.empty-state-illustration::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px dashed var(--border);
  animation: emptyRotate 20s linear infinite;
}

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

.empty-state-illustration svg {
  width: 48px;
  height: 48px;
  color: var(--primary);
}

.empty-state-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.empty-state-message {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.empty-state-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Empty state for preview */
.preview-empty {
  height: 100%;
  min-height: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--border-light);
  border-radius: var(--radius);
  border: 2px dashed var(--border);
}

.preview-empty-icon {
  width: 80px;
  height: 80px;
  background: var(--card);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.preview-empty-icon svg {
  width: 36px;
  height: 36px;
  color: var(--text-muted);
}

.preview-empty-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.preview-empty-message {
  font-size: 13px;
  color: var(--text-muted);
}

/* Empty state for image grid */
.image-grid-empty {
  grid-column: 1 / -1;
  padding: 60px 24px;
  text-align: center;
  background: var(--border-light);
  border-radius: var(--radius);
  border: 2px dashed var(--border);
}

.image-grid-empty-icon {
  width: 72px;
  height: 72px;
  background: var(--card);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: var(--shadow);
}

.image-grid-empty-icon svg {
  width: 32px;
  height: 32px;
  color: var(--text-muted);
}

.image-grid-empty-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.image-grid-empty-message {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 300px;
  margin: 0 auto;
}


/* =============== Help Tips =============== */
.help-tip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  background: var(--border-light);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: help;
  margin-left: 6px;
  transition: all var(--transition);
}

.help-tip:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* =============== Feature Hints =============== */
.feature-hint {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--primary-light);
  border: 1px solid rgba(139, 195, 74, 0.2);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.feature-hint-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-hint-icon svg {
  width: 18px;
  height: 18px;
  color: white;
}

.feature-hint-content {
  flex: 1;
}

.feature-hint-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.feature-hint-message {
  font-size: 13px;
  color: var(--text-secondary);
}

.feature-hint-dismiss {
  padding: 4px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 4px;
  transition: all var(--transition);
}

.feature-hint-dismiss:hover {
  background: var(--border-light);
  color: var(--text);
}

/* =============== Setup Notice =============== */
.setup-notice {
  background: var(--primary-light);
  border: 1px solid rgba(139, 195, 74, 0.25);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}

.setup-notice-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: rgba(139, 195, 74, 0.1);
  border-bottom: 1px solid rgba(139, 195, 74, 0.15);
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
}

.setup-notice-header svg {
  width: 16px;
  height: 16px;
}

.setup-notice-close {
  margin-left: auto;
  background: none;
  border: none;
  font-size: 18px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  border-radius: 4px;
  transition: all var(--transition);
}

.setup-notice-close:hover {
  background: rgba(139, 195, 74, 0.2);
  color: var(--text);
}

.setup-notice-body {
  padding: 12px;
}

.setup-notice-body p {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.setup-notice-code {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card-solid);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 8px;
}

.setup-notice-code code {
  flex: 1;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 11px;
  color: var(--text);
  word-break: break-all;
}

.copy-btn {
  background: var(--border-light);
  border: none;
  padding: 4px 6px;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-muted);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.copy-btn.copied {
  background: var(--success-light);
  color: var(--success);
}

.setup-notice-hint {
  font-size: 10px !important;
  color: var(--text-muted) !important;
  margin-bottom: 0 !important;
  margin-top: 4px;
}

.setup-notice-hint strong {
  color: var(--primary);
}

.setup-notice-or {
  font-size: 10px !important;
  color: var(--text-muted) !important;
  text-align: center;
  margin: 4px 0 !important;
}

/* Hidden state */
.setup-notice.hidden {
  display: none;
}