:root {
  /* 颜色令牌 - 浅色模式 */
  --bg-body: #f8f9fc;
  --bg-card: #ffffff;
  --bg-hover: #f1f5f9;
  --bg-active: #e2e8f0;
  --bg-overlay: rgba(15, 23, 42, 0.45);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --border-color: #e2e8f0;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: rgba(79, 70, 229, 0.08);
  --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --transition: 160ms cubic-bezier(0.4, 0, 0.2, 1);
  --checker: repeating-conic-gradient(#e2e8f0 0% 25%, transparent 0% 50%) 50% / 16px 16px;
}

[data-theme="dark"] {
  --bg-body: #0c0d12;
  --bg-card: #16181f;
  --bg-hover: #1e2029;
  --bg-active: #282a35;
  --bg-overlay: rgba(0, 0, 0, 0.65);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --border-color: #282a35;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-soft: rgba(129, 140, 248, 0.12);
  --accent-gradient: linear-gradient(135deg, #818cf8, #a78bfa, #c4b5fd);
  --success: #4ade80;
  --warning: #fbbf24;
  --danger: #f87171;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.35), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.45), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --checker: repeating-conic-gradient(#282a35 0% 25%, transparent 0% 50%) 50% / 16px 16px;
}

@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    --bg-body: #0c0d12;
    --bg-card: #16181f;
    --bg-hover: #1e2029;
    --bg-active: #282a35;
    --bg-overlay: rgba(0, 0, 0, 0.65);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --border-color: #282a35;
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-soft: rgba(129, 140, 248, 0.12);
    --accent-gradient: linear-gradient(135deg, #818cf8, #a78bfa, #c4b5fd);
    --success: #4ade80;
    --warning: #fbbf24;
    --danger: #f87171;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.35), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.45), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --checker: repeating-conic-gradient(#282a35 0% 25%, transparent 0% 50%) 50% / 16px 16px;
  }
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ======================== Hero Section ======================== */
.hero {
  position: relative;
  padding: 48px var(--space-xl) 40px;
  text-align: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(99, 102, 241, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 50% at 20% 30%, rgba(167, 139, 250, 0.06) 0%, transparent 50%);
  z-index: 0;
}

[data-theme="dark"] .hero-bg,
[data-theme="auto"] .hero-bg {
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(129, 140, 248, 0.1) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(167, 139, 250, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse 60% 50% at 20% 30%, rgba(196, 181, 253, 0.04) 0%, transparent 50%);
}

@media (prefers-color-scheme: dark) {
  [data-theme="auto"] .hero-bg {
    background:
      radial-gradient(ellipse 80% 60% at 50% 0%, rgba(129, 140, 248, 0.1) 0%, transparent 60%),
      radial-gradient(ellipse 60% 50% at 80% 20%, rgba(167, 139, 250, 0.06) 0%, transparent 50%),
      radial-gradient(ellipse 60% 50% at 20% 30%, rgba(196, 181, 253, 0.04) 0%, transparent 50%);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
  animation: hero-fade-in 600ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes hero-fade-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-xl);
}

.hero-badge i {
  font-size: 14px;
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  margin: 0 0 var(--space-lg);
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-primary);
}

.hero-title-accent {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

@media (max-width: 768px) {
  .hero {
    padding: 48px var(--space-lg) 40px;
  }
  .hero-title {
    font-size: 36px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 28px;
  }
}

/* ======================== Header ======================== */
.app-header {
  height: 60px;
  padding: 0 var(--space-xl);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 30;
  box-shadow: var(--shadow-sm);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.brand-icon {
  font-size: 22px;
  color: var(--text-primary);
}

.brand-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.capability-badges {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: background var(--transition), color var(--transition);
}

.badge-ghost {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

.badge-success {
  background: rgba(22, 163, 74, 0.12);
  color: var(--success);
}

.badge-disabled {
  background: transparent;
  color: var(--text-tertiary);
  border: 1px dashed var(--border-color);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.theme-toggle:hover {
  background: var(--bg-hover);
  transform: translateY(-1px);
}

.theme-icon-light,
.theme-icon-dark,
.theme-icon-auto {
  display: none;
}

[data-theme="light"] .theme-icon-light,
[data-theme="dark"] .theme-icon-dark,
[data-theme="auto"] .theme-icon-auto {
  display: inline;
}

/* Main layout */
.app-main {
  flex: 1;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl);
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

/* Settings panel */
.settings-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: row;
  overflow: hidden;
  height: fit-content;
  max-height: calc(100vh - 108px);
  position: sticky;
  top: 76px;
}

.tab-bar {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-md);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  background: var(--bg-body);
}

.tab-btn {
  width: 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--space-md) var(--space-xs);
  border: none;
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  white-space: nowrap;
}

.tab-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  transform: translateX(1px);
}

.tab-btn.is-active {
  background: var(--accent-soft);
  color: var(--accent);
  box-shadow: inset 2px 0 0 0 var(--accent);
}

.tab-icon {
  font-size: 18px;
  line-height: 1;
}

.settings-scroll {
  flex: 1;
  min-width: 0;
  overflow-y: auto;
  padding: var(--space-lg);
  scrollbar-width: thin;
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.panel-group {
  margin-bottom: var(--space-xl);
}

.panel-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.value-label {
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  font-weight: 700;
}

.hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin: var(--space-sm) 0 0;
}

/* Format radios */
.format-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.format-radio {
  position: relative;
  cursor: pointer;
}

.format-radio input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.format-radio span {
  display: block;
  text-align: center;
  padding: var(--space-sm) var(--space-xs);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.format-radio:hover span {
  border-color: var(--accent);
  color: var(--text-primary);
}

.format-radio input:checked + span {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.format-radio input:disabled + span {
  opacity: 0.45;
  cursor: not-allowed;
  border-color: var(--border-color);
}

/* Preset chips */
.preset-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.preset-chip {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.preset-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.preset-chip.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.filter-chip {
  padding: var(--space-xs);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  overflow: hidden;
}

.filter-thumb {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 4px;
  display: block;
}

.filter-name {
  font-size: 11px;
  white-space: nowrap;
}

.filter-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.filter-chip.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

/* Sliders */
.slider-control {
  margin-bottom: var(--space-md);
}

.slider-control label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: var(--bg-active);
  outline: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-card);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-card);
  box-shadow: var(--shadow-sm);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.slider:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 4px var(--accent-soft);
}

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

/* Inputs */
.control-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.control-row label {
  font-size: 13px;
  color: var(--text-secondary);
  min-width: 72px;
  flex-shrink: 0;
}

.input,
.select {
  flex: 1;
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 13px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

.input-sm {
  width: 80px;
  flex: none;
}

.color-input {
  width: 36px;
  height: 36px;
  padding: 2px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  cursor: pointer;
}

.color-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

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

/* Radio pills */
.resize-modes,
.watermark-types {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.radio-pill {
  position: relative;
  cursor: pointer;
}

.radio-pill input {
  position: absolute;
  opacity: 0;
}

.radio-pill span,
.chip {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  transition: all var(--transition);
  cursor: pointer;
}

.radio-pill:hover span,
.chip:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.radio-pill input:checked + span,
.chip.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

/* Transform buttons */
.transform-actions {
  display: flex;
  gap: var(--space-sm);
}

.icon-btn {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.icon-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 9px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
}

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

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.2);
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.95;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

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

.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-hover);
}

.btn-block {
  width: 100%;
}

/* Upload zone */
.content-area {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.upload-zone {
  position: relative;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}

.upload-zone:hover,
.upload-zone.is-dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.upload-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-content {
  pointer-events: none;
}

.upload-icon {
  font-size: 40px;
  display: block;
  margin-bottom: var(--space-md);
}

.upload-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--space-xs);
}

.upload-subtitle {
  font-size: 13px;
  color: var(--text-tertiary);
  margin: 0;
}

.upload-overlay {
  position: absolute;
  inset: 0;
  background: var(--accent-soft);
  border-radius: var(--radius-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.upload-zone.is-dragover .upload-overlay {
  opacity: 1;
}

.upload-small {
  border: 1px dashed var(--border-color);
  border-radius: var(--radius);
  padding: var(--space-md);
  text-align: center;
}

.upload-collapsed {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.upload-collapsed .btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.upload-collapsed-hint {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* Preview panel */
.preview-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-color);
}

.preview-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.preview-info {
  font-size: 12px;
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
}

.preview-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  background: var(--checker);
  min-height: 120px;
}

.preview-stage canvas {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--radius-sm);
}

/* Results */
.results-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: var(--space-xl);
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.results-title {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.results-title h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
}

.results-count {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 999px;
}

.results-actions {
  display: flex;
  gap: var(--space-sm);
}

.progress-bar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.progress-track {
  flex: 1;
  height: 6px;
  background: var(--bg-active);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width var(--transition);
  background-image: linear-gradient(
    45deg,
    rgba(255,255,255,0.15) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255,255,255,0.15) 50%,
    rgba(255,255,255,0.15) 75%,
    transparent 75%,
    transparent
  );
  background-size: 20px 20px;
  animation: progress-stripe 1s linear infinite;
}

@keyframes progress-stripe {
  from { background-position: 20px 0; }
  to { background-position: 0 0; }
}

.progress-text {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  white-space: nowrap;
}

.summary-line {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.summary-line strong {
  color: var(--success);
}

.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-tertiary);
}

.empty-icon {
  font-size: 48px;
  display: block;
  margin-bottom: var(--space-md);
  opacity: 0.6;
}

.empty-sub {
  font-size: 13px;
  margin-top: var(--space-xs);
}

.result-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.result-item {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.result-item.single-mode {
  grid-template-columns: 200px 1fr auto;
}

.result-item.single-mode .result-thumb.large {
  width: 200px;
  height: 200px;
}

.result-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.result-item.is-selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.result-thumb {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--checker);
  flex-shrink: 0;
  cursor: pointer;
}

.result-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.result-loading {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.result-info {
  min-width: 0;
}

.result-name {
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 var(--space-xs);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-sm);
  font-size: 12px;
  color: var(--text-secondary);
}

.result-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-xs);
}

.chip-format-in,
.chip-format-out {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}

.chip-format-in {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

.chip-format-out {
  background: var(--accent-soft);
  color: var(--accent);
}

.result-actions {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.action-btn {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.action-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.action-btn.danger:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.result-save {
  font-size: 12px;
  color: var(--success);
  font-weight: 700;
}

/* Modals */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
}

.modal-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  max-height: calc(100vh - var(--space-2xl));
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modal-in 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-lg {
  max-width: 720px;
}

.modal-xl {
  max-width: 960px;
}

@keyframes modal-in {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0;
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-tertiary);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
}

.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-xl);
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl) var(--space-xl);
}

/* Compare */
.compare-stage {
  position: relative;
  width: 100%;
  height: 520px;
  background: var(--checker);
  border-radius: var(--radius);
  overflow: hidden;
  user-select: none;
}

.compare-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.compare-after-wrap {
  position: absolute;
  inset: 0;
  width: 50%;
  overflow: hidden;
}

.compare-after {
  width: 200%;
  height: 100%;
}

.compare-slider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: #fff;
  cursor: ew-resize;
  transform: translateX(-50%);
  outline: none;
}

.compare-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 32px;
  height: 32px;
  background: #fff;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
}

.compare-handle::before,
.compare-handle::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
}

.compare-handle::before {
  border-width: 5px 6px 5px 0;
  border-color: transparent var(--text-primary) transparent transparent;
  margin-right: 3px;
}

.compare-handle::after {
  border-width: 5px 0 5px 6px;
  border-color: transparent transparent transparent var(--text-primary);
}

/* Info / EXIF lists */
.info-preview,
.exif-preview,
.palette-preview {
  width: 100%;
  max-height: 220px;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: var(--space-lg);
  background: var(--checker);
  display: flex;
  align-items: center;
  justify-content: center;
}

.info-preview img,
.exif-preview img,
.palette-preview img {
  max-width: 100%;
  max-height: 220px;
  object-fit: contain;
}

.info-list,
.exif-list {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-xs) var(--space-md);
  margin: 0;
  font-size: 13px;
}

.info-list dt,
.exif-list dt {
  color: var(--text-tertiary);
  font-weight: 600;
}

.info-list dd,
.exif-list dd {
  margin: 0;
  color: var(--text-primary);
  word-break: break-word;
}

/* Palette */
.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: var(--space-md);
}

.palette-color {
  cursor: pointer;
  text-align: center;
  transition: transform var(--transition);
}

.palette-color:hover {
  transform: translateY(-2px);
}

.palette-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.08);
  margin-bottom: var(--space-xs);
}

.palette-hex {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
}

/* Rename preview */
.rename-preview {
  list-style: none;
  margin: var(--space-md) 0 0;
  padding: 0;
  max-height: 260px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
}

.rename-preview li {
  display: flex;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  font-size: 13px;
  border-bottom: 1px solid var(--border-color);
}

.rename-preview li:last-child {
  border-bottom: none;
}

.rename-preview .old-name {
  color: var(--text-tertiary);
  text-decoration: line-through;
}

.rename-preview .new-name {
  color: var(--accent);
  font-weight: 600;
}

/* Toast */
.toast-container {
  position: fixed;
  top: var(--space-xl);
  right: var(--space-xl);
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 220px;
  max-width: 360px;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  animation: toast-in 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.toast i {
  font-size: 16px;
  flex-shrink: 0;
}
.toast.success i { color: var(--success); }
.toast.error i { color: var(--danger); }
.toast.warning i { color: var(--warning); }
.toast.info i { color: var(--accent); }

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

button:focus-visible,
input:focus-visible,
select:focus-visible,
.slider:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

/* Responsive */
@media (max-width: 1024px) {
  .app-main {
    grid-template-columns: 280px 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg);
  }
}

@media (max-width: 768px) {
  .app-header {
    padding: 0 var(--space-md);
  }

  .brand-title {
    font-size: 16px;
  }

  .capability-badges {
    display: none;
  }

  .app-main {
    grid-template-columns: 1fr;
    padding: var(--space-md);
  }

  .settings-panel {
    position: static;
    max-height: none;
    flex-direction: column;
  }

  .tab-bar {
    flex-direction: row;
    justify-content: space-between;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
    overflow-y: hidden;
  }

  .tab-btn {
    flex: 1;
    width: auto;
    min-width: 56px;
  }

  .tab-btn.is-active {
    box-shadow: inset 0 -2px 0 0 var(--accent);
  }

  .result-item {
    grid-template-columns: 64px 1fr;
  }

  .result-actions {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }

  .compare-stage {
    height: 320px;
  }
}

@media (max-width: 480px) {
  .format-options {
    grid-template-columns: repeat(2, 1fr);
  }

  .preset-grid {
    grid-template-columns: 1fr;
  }

  .filter-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .results-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .results-actions {
    width: 100%;
  }

  .results-actions .btn {
    flex: 1;
  }
}