/* ==========================================================================
   AI Photo Studio - Shared Component Styles
   Extracted from duplicated styles in retouching.html and colorgrading.html.
   ========================================================================== */

/* ===== Section Title ===== */
.section-title {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

/* ===== Upload Zone ===== */
.upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-8);
  border: 2px dashed var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--bg-tertiary);
  cursor: pointer;
  transition: all var(--transition-normal);
}
.upload-zone:hover {
  border-color: var(--brand-accent);
  background: rgba(255, 255, 255, 0.03);
}

/* ===== Toggle Switch ===== */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border-subtle);
}
.toggle-row:last-child {
  border-bottom: none;
}
.toggle-label {
  font-size: var(--text-sm);
  color: var(--text-primary);
}
.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  cursor: pointer;
}
.toggle-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: 12px;
  transition: all var(--transition-fast);
}
.toggle-switch input:checked + .toggle-track {
  background: var(--brand-accent);
  border-color: var(--brand-accent);
}
.toggle-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: var(--text-primary);
  border-radius: 50%;
  transition: transform var(--transition-fast);
  pointer-events: none;
}
.toggle-switch input:checked ~ .toggle-knob {
  transform: translateX(20px);
}
.toggle-switch:focus-within {
  outline: var(--focus-ring, 0 0 0 2px var(--brand-accent));
  outline-offset: 2px;
}

/* ===== Parameter Slider ===== */
.slider-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border-subtle);
}
.slider-row:last-child {
  border-bottom: none;
}
.slider-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-1);
}
.slider-name {
  font-size: var(--text-sm);
  color: var(--text-primary);
}
.slider-value {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-weight: var(--font-weight-medium);
  min-width: 36px;
  text-align: right;
}
.param-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-elevated);
  outline: none;
  cursor: pointer;
}
.param-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  margin-top: -8px;
  border-radius: 50%;
  background: var(--brand-accent);
  cursor: pointer;
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 0 1px var(--brand-accent);
  transition: transform var(--transition-fast);
}
.param-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}
.param-slider::-webkit-slider-thumb:active {
  transform: scale(0.95);
}
.param-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--brand-accent);
  cursor: pointer;
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 0 1px var(--brand-accent);
}
.param-slider:focus-visible {
  outline: var(--focus-ring, 0 0 0 2px var(--brand-accent));
  outline-offset: 2px;
}

/* ===== Buttons ===== */
.btn-primary-accent {
  background: var(--brand-accent);
  color: var(--brand-dark);
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 100%;
  text-align: center;
  font-family: var(--font-primary);
}
.btn-primary-accent:hover {
  filter: brightness(0.95);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.06);
}
.btn-primary-accent:active {
  transform: scale(0.98);
}
.btn-primary-accent:focus-visible {
  outline: var(--focus-ring, 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--brand-accent));
  outline-offset: 2px;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 100%;
  text-align: center;
  font-family: var(--font-primary);
}
.btn-secondary:hover {
  border-color: var(--border-default);
  color: var(--text-primary);
  background: var(--bg-elevated);
}
.btn-secondary:active {
  transform: scale(0.98);
}
.btn-secondary:focus-visible {
  outline: var(--focus-ring, 0 0 0 2px var(--brand-accent));
  outline-offset: 2px;
}

/* ===== Button Disabled State ===== */
.btn-primary-accent:disabled,
.btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== Modal Dialog ===== */
.modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}
.modal.is-open {
  opacity: 1;
  visibility: visible;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 9, 0.8);
  backdrop-filter: blur(8px);
}
.modal-content {
  position: relative;
  width: 100%;
  max-width: 448px;
  margin: var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--bg-modal);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-xl);
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}
.modal.is-open .modal-content {
  transform: scale(1);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}
.modal-header h3 {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin: 0;
}
.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-label);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.modal-body {
  padding: var(--space-6);
}
.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-top: 1px solid var(--border-subtle);
}

/* ===== Dropdown Menu ===== */
.dropdown {
  position: relative;
  display: inline-flex;
}
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: var(--z-popover);
  min-width: 160px;
  margin-top: var(--space-1);
  padding: var(--space-1);
  border-radius: var(--radius-md);
  background: var(--bg-popover);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
}
.dropdown.is-open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}
.dropdown-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.dropdown-item.is-danger {
  color: var(--state-error);
}
.dropdown-item.is-danger:hover {
  background: rgba(220, 38, 38, 0.1);
}
.dropdown-divider {
  height: 1px;
  margin: var(--space-1) 0;
  background: var(--border-subtle);
}

/* ===== Tooltip ===== */
.tooltip-wrapper {
  position: relative;
  display: inline-flex;
}
.tooltip {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-popover);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-on-surface-secondary);
  font-size: var(--text-xs);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.tooltip-wrapper:hover .tooltip,
.tooltip.is-visible {
  opacity: 1;
}

/* ===== Ghost Button ===== */
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.btn-ghost:active {
  transform: scale(0.97);
}
.btn-ghost:focus-visible {
  outline: var(--focus-ring, 0 0 0 2px var(--brand-accent));
  outline-offset: 2px;
}

/* ===== Danger Button ===== */
.btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--state-error);
  background: var(--state-error);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.btn-danger:hover {
  background: var(--color-danger-light);
  border-color: var(--color-danger-light);
}
.btn-danger:active {
  transform: scale(0.97);
  opacity: 0.9;
}
.btn-danger:focus-visible {
  outline: var(--focus-ring, 0 0 0 2px var(--state-error));
  outline-offset: 2px;
}

/* ===== Button Size Variants ===== */
.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}
.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

/* ===== Button Loading State ===== */
.btn-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}
.btn-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 14px;
  margin-top: -7px;
  margin-left: -7px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
  color: var(--text-primary);
}
@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* ===== Global Form Styles ===== */
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-input);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-family: var(--font-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-label);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(212, 212, 216, 0.15);
}
.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.form-input.is-error,
.form-textarea.is-error {
  border-color: var(--state-error);
}
.form-textarea {
  resize: vertical;
  min-height: 80px;
}

/* ===== Comparison Container (Before/After) ===== */
.comparison-container {
  position: relative;
  flex: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  min-height: 500px;
}
.comparison-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--bg-tertiary);
}
.comparison-before {
  z-index: var(--z-content);
  filter: saturate(0.5) brightness(0.8);
}
.comparison-after {
  z-index: var(--z-content-above);
  clip-path: inset(0 0 0 50%);
  transition: filter 0.8s ease;
  filter: saturate(0.5) brightness(0.8);
}
.comparison-after.retouch-enhanced {
  filter: brightness(1.05) saturate(1.1) contrast(1.05);
}
.comparison-after.color-enhanced {
  filter: brightness(1.05) saturate(1.08) contrast(1.03) sepia(0.03);
}
.comparison-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 3px;
  background: var(--brand-accent);
  z-index: var(--z-dropdown);
  cursor: ew-resize;
  transition: box-shadow var(--transition-fast);
  transform: translateX(-50%);
  touch-action: none;
}
.comparison-divider:hover,
.comparison-divider:active {
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.15), var(--shadow-lg);
}
.comparison-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 32px;
  height: 32px;
  background: var(--brand-accent);
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}
.comparison-divider::after {
  content: '\27F7';
  position: absolute;
  bottom: -22px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: var(--text-tertiary);
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}
.comparison-divider:hover::after {
  opacity: 1;
}
.comparison-divider-hint {
  position: absolute;
  top: calc(50% + 28px);
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  color: var(--text-tertiary);
  white-space: nowrap;
  pointer-events: none;
  animation: fadeOut 3s ease forwards;
  font-family: var(--font-primary);
}
@keyframes fadeOut {
  0%, 60% { opacity: 1; }
  100% { opacity: 0; }
}
@keyframes fadeOutDelayed {
  to { opacity: 0; }
}
.comparison-label {
  position: absolute;
  top: 12px;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  z-index: var(--z-hint);
  pointer-events: none;
  backdrop-filter: blur(8px);
}
.label-before {
  left: 12px;
  background: rgba(0, 0, 0, 0.70);
  color: var(--text-secondary);
}
.label-before::before { content: '\u539F\u56FE'; margin-right: 4px; }
.label-after {
  right: 12px;
  background: rgba(255, 255, 255, 0.20);
  color: var(--brand-accent);
}
.label-after::before { content: '\u6548\u679C'; margin-right: 4px; }
.comparison-info-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}
.info-separator {
  color: var(--border-default);
}

/* ===== Status Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 10px;
  font-weight: var(--font-weight-medium);
  backdrop-filter: blur(8px);
}
.badge-active {
  background: rgba(255, 255, 255, 0.90);
  color: var(--brand-dark);
}
.badge-completed {
  background: rgba(74, 222, 128, 0.90);
  color: #fff;
}
.badge-archived {
  background: rgba(138, 137, 133, 0.9);
  color: #fff;
}
.badge-trashed {
  background: rgba(220, 38, 38, 0.90);
  color: #fff;
}
.badge-liked {
  background: var(--color-danger);
  color: #fff;
}
.badge-review {
  background: var(--state-warning);
  color: #fff;
}

/* ===== Type Badges ===== */
.type-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  backdrop-filter: blur(8px);
}
.type-badge-wedding {
  background: rgba(255, 255, 255, 0.85);
  color: var(--brand-dark);
}
.type-badge-portrait {
  background: rgba(161, 161, 170, 0.85);
  color: var(--brand-dark);
}
.type-badge-event {
  background: rgba(74, 222, 128, 0.85);
  color: #fff;
}
.type-badge-commercial {
  background: rgba(155, 106, 204, 0.85);
  color: #fff;
}
.type-badge-other {
  background: rgba(138, 137, 133, 0.85);
  color: var(--brand-dark);
}