/* ====== AI动漫绘 v2.0 — 全局样式 + 全部组件 ====== */
/* 暖光奶油主题 */

/* ====== 1. Reset ====== */
* { margin: 0; padding: 0; box-sizing: border-box; }

/* ====== 2. Body ====== */
body {
  background: linear-gradient(135deg, var(--color-bg-start) 0%, var(--color-bg-end) 100%);
  font-family: var(--font-body);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
}

/* ====== 3. App Container ====== */
.app-container {
  max-width: 640px;
  width: 100%;
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  position: relative;
  overflow: hidden;
  padding: 30px var(--space-2xl);
  text-align: center;
  box-shadow: var(--shadow-card);
}

/* ====== 4. Header Bar ====== */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--space-lg);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}
.app-logo {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ====== 5. Language Switcher ====== */
.lang-switcher {
  display: flex;
  gap: 2px;
}
.lang-btn {
  min-width: var(--touch-min);
  min-height: var(--touch-min);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: border-color var(--transition-fast), color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}
.lang-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ====== 6. View System ====== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-8px); }
}
.view {
  animation: fadeIn var(--transition-normal);
}
.view.hidden {
  display: none !important;
}

/* ====== 7. Style Cards ====== */
.style-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}
.style-card {
  padding: var(--space-md) var(--space-xs);
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal);
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.style-card:focus-visible {
  outline: 2px solid var(--card-accent, var(--color-primary));
  outline-offset: 2px;
}
.style-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--card-accent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}
.style-card:hover {
  border-color: var(--card-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.style-card.active {
  border-color: var(--card-accent);
  background: #fff8f0;
  background: color-mix(in srgb, var(--card-accent) 8%, #fff8f0);
}
.style-card.active::before { opacity: 1; }
.style-card .card-icon { font-size: 1.6rem; display: block; margin-bottom: var(--space-xs); }
.style-card .card-label { font-size: 0.8rem; font-weight: 600; color: var(--color-text); }
.style-card .card-desc { font-size: 0.65rem; color: var(--color-text-muted); margin-top: 2px; }

/* ====== 8. Upload Area ====== */
.upload-area {
  border: 2px dashed #e8d5c0;
  border-radius: var(--radius-xl);
  padding: 36px var(--space-xl);
  cursor: pointer;
  margin: var(--space-xl) 0;
  background: #fefaf5;
  transition: border-color var(--transition-normal), background var(--transition-normal), box-shadow var(--transition-normal);
}
.upload-area:hover {
  border-color: var(--color-primary);
  background: #fef5ea;
}
.upload-area.drag-over {
  border-color: var(--color-primary);
  background: #fef5ea;
  box-shadow: 0 0 0 4px rgba(232, 153, 74, 0.15);
}
.upload-area.mini {
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-sm) 0;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
}
.upload-area.mini > *:not(.mini-visible) { display: none; }
.upload-area .mini-visible { display: none; }
.upload-area.mini .mini-visible { display: block; }
#fileInput { display: none; }

/* ====== 9. Shared Banner ====== */
#sharedBanner {
  background: linear-gradient(135deg, #e8994a10, #d4883c10);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg) var(--space-lg);
  margin-bottom: var(--space-xl);
  border: 1.5px solid #e8994a30;
  animation: fadeIn var(--transition-normal);
}
#sharedBanner .share-heading {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}
#sharedBanner .share-badge {
  display: inline-block;
  background: var(--color-gradient);
  color: #fff;
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
  font-weight: 500;
}
#sharedImg {
  width: 100%;
  max-height: 300px;
  object-fit: contain;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  background: #fdf7ef;
}
#sharedBanner .share-powered {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}
.share-cta-btn {
  display: block;
  width: 100%;
  padding: 14px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 1.05rem;
  border: none;
  cursor: pointer;
  background: var(--color-gradient);
  color: white;
  transition: filter var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
  min-height: var(--touch-min);
}
.share-cta-btn:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

/* ====== 10. Skeleton Loading ====== */
@keyframes skeletonPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}
.skeleton {
  background: var(--skeleton-bg);
  background-size: 200% 100%;
  animation: skeletonPulse 1.5s ease-in-out infinite;
}
.comparison-container.loading .comparison-img,
.comparison-container.loading .comparison-overlay img {
  visibility: hidden;
}
.comparison-container.loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--skeleton-bg);
  background-size: 200% 100%;
  animation: skeletonPulse 1.5s ease-in-out infinite;
  z-index: 5;
}

/* ====== 11. Comparison Slider — KEPT EXACTLY from v1.0 (color updates only) ====== */
.comparison-container {
  position: relative;
  width: 100%;
  aspect-ratio: 3/4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--space-lg) auto 0;
  background: #e8d5c0;
  cursor: col-resize;
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-y;
}
.comparison-container:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.comparison-container.dragging { cursor: col-resize; }
.comparison-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.comparison-overlay {
  position: absolute;
  inset: 0;
  clip-path: inset(0 0 0 50%);
  pointer-events: none;
}
.comparison-overlay img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.3s ease;
}
.slider-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 3px;
  background: rgba(255,255,255,0.9);
  box-shadow: 0 0 8px rgba(0,0,0,0.25);
  pointer-events: none;
  z-index: 2;
  transform: translateX(-50%);
}
.slider-grip {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: var(--touch-min);
  height: var(--touch-min);
  min-width: 36px;
  min-height: 36px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  z-index: 3;
  pointer-events: auto;
  cursor: col-resize;
}
.slider-grip::before { content: '⟷'; color: #555; }
.comparison-label {
  position: absolute;
  bottom: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--space-md);
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  pointer-events: none;
  z-index: 1;
}
.label-before { left: var(--space-md); }
.label-after { right: var(--space-md); }

/* ====== 12. Button System ====== */
.btn {
  padding: var(--space-md) var(--space-2xl);
  border-radius: var(--radius-full);
  font-weight: 600;
  border: none;
  cursor: pointer;
  margin: 6px;
  font-size: 1rem;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  min-height: var(--touch-min);
}
.btn-primary {
  background: var(--color-gradient);
  color: white;
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-outline {
  background: #fdf7ef;
  color: var(--color-text);
}
.btn-outline:hover { background: #fef5ea; }
.btn-icon {
  padding: 10px 18px;
  border-radius: var(--radius-full);
  font-weight: 600;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  margin: var(--space-xs);
  font-size: 0.85rem;
  transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  color: var(--color-text);
  min-height: var(--touch-min);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}
.btn-icon:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-icon.copied {
  border-color: var(--color-success);
  color: var(--color-success);
  background: #f0fdfa;
}

/* ====== 13. Progress Bar ====== */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin: var(--space-md) 0;
}
.progress-fill {
  height: 100%;
  background: var(--color-gradient);
  border-radius: var(--radius-sm);
  box-shadow: 0 0 6px rgba(232, 153, 74, 0.6);
  transition: width 0.3s ease;
  width: 0%;
}

/* ====== 14. Spinner ====== */
@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: var(--space-xl) auto;
}

/* ====== 15. Processing Fun Text ====== */
.tips {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}
.processing-fun-text {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
  min-height: 1.2em;
  transition: opacity 0.5s ease;
}

/* ====== 16. Error Panel ====== */
.error-panel {
  margin: var(--space-xl) auto;
  padding: var(--space-lg);
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  border-radius: var(--space-md);
  max-width: 400px;
  text-align: center;
  animation: fadeIn var(--transition-normal);
}
#errorPanel button:hover { opacity: 0.85; }
#retryBtn { min-height: var(--touch-min); min-width: var(--touch-min); }
#closeErrorBtn { min-height: var(--touch-min); min-width: var(--touch-min); }

/* ====== 17. Donate Area ====== */
.btn-donate-toggle {
  padding: var(--space-sm) var(--space-xl);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1.5px dashed #e8c8a0;
  background: linear-gradient(135deg, #fef9f0, #fef5ea);
  color: var(--color-primary-dark);
  cursor: pointer;
  transition: background var(--transition-normal), border-color var(--transition-normal);
  min-height: var(--touch-min);
}
.btn-donate-toggle:hover {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, #fef5ea, #fef0dc);
  transform: translateY(-1px);
}
.btn-donate-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn-donate-toggle.active {
  border-style: solid;
  border-color: var(--color-primary);
  background: #fef5ea;
}

.donate-panel {
  margin-top: var(--space-sm);
  padding: var(--radius-md) var(--space-sm) var(--space-sm);
  background: #fefefe;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  animation: fadeIn var(--transition-normal);
}

.donate-hint {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.donate-qr-row {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}
.donate-qr-card {
  text-align: center;
  flex: 1;
  max-width: 160px;
}
.donate-qr-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #fafafa;
}
.donate-qr-label {
  display: inline-block;
  margin-top: var(--space-xs);
  font-size: 0.72rem;
  color: var(--color-text-placeholder);
  font-weight: 500;
}
.donate-qr-placeholder {
  display: none;
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--color-border);
  background: #fafafa;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

/* ====== 18. History Area ====== */
.history-empty {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  padding: var(--space-lg);
  text-align: center;
}
.quota-warning {
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--color-warning-text);
  animation: fadeIn var(--transition-normal);
}
#historyList img {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border var(--transition-fast);
}
#historyList img:hover {
  border-color: var(--color-primary);
}

/* ====== 19. Share Row ====== */
.share-row {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-md);
}

/* ====== 20. Utility ====== */
.hidden { display: none !important; }
.fade-in { animation: fadeIn var(--transition-normal); }
.fade-out { animation: fadeOut var(--transition-normal); }

/* ====== 21. Focus Visible ====== */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ====== 22. Responsive ====== */
@media (max-width: 768px) {
  .app-container {
    max-width: 100%;
    border-radius: var(--radius-xl);
    padding: var(--space-xl) var(--space-lg);
  }
  .app-logo { font-size: 1.6rem; }
}
@media (max-width: 400px) {
  :root { --touch-min: 40px; }
  .style-group { grid-template-columns: repeat(2, 1fr); gap: 6px; }
  .style-card { padding: var(--space-sm) 4px; min-height: 64px; }
  .style-card .card-icon { font-size: 1.3rem; }
  .app-container { padding: var(--space-lg) var(--space-md); border-radius: var(--radius-lg); }
  .app-logo { font-size: 1.4rem; }
  .comparison-label { font-size: 0.65rem; padding: 3px 8px; }
  .share-row { gap: 4px; }
  .btn-icon { padding: 8px 12px; font-size: 0.78rem; }
  .lang-switcher { gap: 1px; }
  .lang-btn { min-width: 36px; min-height: 36px; font-size: 0.65rem; padding: 2px 5px; }
}
@media (max-width: 320px) {
  .style-group { grid-template-columns: repeat(2, 1fr); gap: 4px; }
  .style-card { padding: 6px 2px; min-height: 56px; }
  .style-card .card-icon { font-size: 1.1rem; }
  .style-card .card-label { font-size: 0.7rem; }
  .style-card .card-desc { font-size: 0.6rem; }
  .app-container { padding: var(--space-md) var(--space-sm); }
  .app-logo { font-size: 1.2rem; }
}