:root {
  color-scheme: light;
  --font-sans: "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --shadow-soft: 0 18px 48px rgba(15, 23, 42, 0.12);
  --shadow-panel: 0 24px 80px rgba(15, 23, 42, 0.18);
  --bg-page: #f3f4f6;
  --bg-shell: rgba(255, 255, 255, 0.78);
  --bg-panel: rgba(255, 255, 255, 0.92);
  --bg-elevated: #ffffff;
  --bg-subtle: #eef2f7;
  --bg-strong: #e5e7eb;
  --bg-input: rgba(255, 255, 255, 0.96);
  --bg-overlay: rgba(15, 23, 42, 0.42);
  --border-soft: rgba(148, 163, 184, 0.24);
  --border-strong: rgba(148, 163, 184, 0.42);
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --text-placeholder: #9ca3af;
  --accent: #111827;
  --accent-strong: #000000;
  --accent-soft: rgba(17, 24, 39, 0.08);
  --success: #15803d;
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.12);
  --scrollbar-track: rgba(148, 163, 184, 0.14);
  --scrollbar-thumb: rgba(107, 114, 128, 0.55);
  --scrollbar-thumb-hover: rgba(75, 85, 99, 0.68);
  --scrollbar-size: 10px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg-page: #0b1020;
  --bg-shell: rgba(17, 24, 39, 0.82);
  --bg-panel: rgba(17, 24, 39, 0.92);
  --bg-elevated: #111827;
  --bg-subtle: #172033;
  --bg-strong: #1f2937;
  --bg-input: rgba(15, 23, 42, 0.92);
  --bg-overlay: rgba(2, 6, 23, 0.65);
  --border-soft: rgba(148, 163, 184, 0.18);
  --border-strong: rgba(148, 163, 184, 0.28);
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --text-placeholder: #6b7280;
  --accent: #f9fafb;
  --accent-strong: #ffffff;
  --accent-soft: rgba(248, 250, 252, 0.1);
  --success: #4ade80;
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.14);
  --shadow-soft: 0 22px 60px rgba(2, 6, 23, 0.34);
  --shadow-panel: 0 30px 96px rgba(2, 6, 23, 0.42);
  --scrollbar-track: rgba(255, 255, 255, 0.08);
  --scrollbar-thumb: rgba(255, 255, 255, 0.28);
  --scrollbar-thumb-hover: rgba(255, 255, 255, 0.4);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-page);
  color: var(--text-primary);
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

body {
  min-height: 100vh;
}

body,
.config-panel,
.prompt-input,
.batch-prompt-input,
.modal-prompt-text {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

button,
input,
select,
textarea {
  font: inherit;
  accent-color: var(--accent);
}

button {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

*::-webkit-scrollbar {
  width: var(--scrollbar-size);
  height: var(--scrollbar-size);
}

*::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
  border-radius: 999px;
}

*::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

.hidden {
  display: none !important;
}

#app {
  min-height: 100vh;
  padding: 20px;
}

#header {
  max-width: 1400px;
  margin: 0 auto 18px;
  padding: 10px 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--bg-elevated);
  font-size: 20px;
  font-weight: 700;
  box-shadow: var(--shadow-soft);
}

:root[data-theme="dark"] .brand-mark {
  color: #111827;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.logo {
  margin: 0;
  font-size: 24px;
  line-height: 1.1;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-switch {
  display: inline-flex;
  align-items: center;
  padding: 4px;
  border-radius: 999px;
  background: var(--bg-shell);
  border: 1px solid var(--border-soft);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-soft);
}

.theme-btn,
.icon-btn {
  border: 0;
  background: transparent;
  cursor: pointer;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.18s ease, transform 0.18s ease, color 0.18s ease;
}

.theme-btn {
  width: 34px;
  height: 34px;
  color: var(--text-muted);
}

.theme-btn svg,
.icon-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-btn.active,
.theme-btn:hover,
.icon-btn:hover {
  background: var(--accent-soft);
  color: var(--text-primary);
}

.icon-btn {
  width: 40px;
  height: 40px;
  color: var(--text-muted);
  background: var(--bg-shell);
  border: 1px solid var(--border-soft);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-soft);
}

#mainLayout {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(360px, 0.95fr);
  gap: 20px;
  align-items: start;
}

#previewArea,
#inputArea {
  min-width: 0;
}

#previewArea {
  min-height: calc(100vh - 132px);
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--bg-shell);
  border: 1px solid var(--border-soft);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-soft);
}

.preview-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.preview-head h2 {
  margin: 0 0 6px;
  font-size: 20px;
}

.preview-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}

.thumbnail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(208px, 1fr));
  gap: 16px;
  align-items: start;
}

.thumbnail-card,
.skeleton-card,
.error-card {
  min-width: 0;
  min-height: 256px;
  border-radius: var(--radius-md);
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.thumbnail-card {
  cursor: pointer;
  position: relative;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.thumbnail-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

.thumbnail-card img,
.skeleton-img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--bg-subtle);
}

.card-body {
  padding: 12px 14px 14px;
  display: grid;
  gap: 8px;
}

.card-prompt {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-primary);
  word-break: break-word;
}

.card-info {
  font-size: 12px;
  color: var(--text-muted);
}

.card-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 1;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(17, 24, 39, 0.78);
  color: #ffffff;
  font-size: 11px;
  backdrop-filter: blur(10px);
}

.thumbnail-delete-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.82);
  color: #ffffff;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.thumbnail-delete-btn svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.thumbnail-card:hover .thumbnail-delete-btn,
.thumbnail-card:focus-within .thumbnail-delete-btn {
  opacity: 1;
  pointer-events: auto;
}

.thumbnail-card:hover .card-badge,
.thumbnail-card:focus-within .card-badge {
  right: 52px;
}

.skeleton-card {
  display: grid;
  grid-template-rows: auto 1fr;
}

.skeleton-body {
  padding: 12px 14px 14px;
  display: grid;
  gap: 10px;
}

.skeleton-text,
.skeleton-text.short {
  border-radius: 999px;
  background: linear-gradient(90deg, var(--bg-subtle), var(--bg-strong), var(--bg-subtle));
  background-size: 200% 100%;
  animation: shimmer 1.5s linear infinite;
}

.skeleton-text {
  height: 12px;
}

.skeleton-text.short {
  width: 68%;
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.error-card {
  padding: 18px;
  display: grid;
  place-items: center;
  gap: 12px;
  text-align: center;
  color: var(--danger);
  background: var(--danger-soft);
  border-color: rgba(220, 38, 38, 0.2);
}

.error-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(220, 38, 38, 0.16);
  font-size: 18px;
}

.retry-btn {
  border: 0;
  border-radius: 999px;
  padding: 9px 16px;
  background: var(--danger);
  color: #ffffff;
  cursor: pointer;
}

.empty-state {
  min-height: 440px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 40px 18px 20px;
}

.empty-state.hidden {
  display: none !important;
}

.empty-illustration {
  width: 96px;
  height: 96px;
  margin: 0 auto 20px;
  padding: 12px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  border-radius: 28px;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
}

.empty-illustration span {
  border-radius: 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-soft);
}

.empty-state h3 {
  margin: 0 0 8px;
  font-size: 22px;
}

.empty-state p {
  margin: 0;
  max-width: 420px;
  color: var(--text-muted);
  line-height: 1.7;
}

#inputArea {
  position: sticky;
  top: 20px;
}

.composer-shell {
  position: relative;
  display: grid;
  gap: 16px;
  padding: 20px;
  border-radius: var(--radius-lg);
  background: var(--bg-shell);
  border: 1px solid var(--border-soft);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-soft);
}

.composer-shell::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: transparent;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, background 0.18s ease;
}

.composer-shell.drag-active::after {
  background: var(--accent-soft);
  opacity: 1;
}

.composer-shell.drag-active {
  border-color: var(--border-strong);
  background: color-mix(in srgb, var(--bg-shell) 82%, var(--accent-soft));
}

.mode-row,
.actions-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.mode-toggle {
  display: inline-flex;
  align-items: center;
  padding: 4px;
  gap: 4px;
  border-radius: 999px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-soft);
}

.toggle-btn {
  border: 0;
  min-width: 108px;
  height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  color: var(--text-muted);
  transition: background 0.18s ease, color 0.18s ease;
}

.toggle-btn.active {
  background: var(--bg-elevated);
  color: var(--text-primary);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
}

:root[data-theme="dark"] .toggle-btn.active {
  background: #0f172a;
}

.mode-actions,
.actions-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.actions-right {
  margin-left: auto;
}

.prompt-panel {
  display: grid;
  gap: 12px;
}

#multiPromptPanel {
  padding: 12px;
  border: 1px dashed var(--border-soft);
  border-radius: 22px;
  background: transparent;
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

.composer-shell.drag-active #multiPromptPanel {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-1px);
}

.prompt-input,
.batch-prompt-input,
.negative-prompt-input,
.param-group input,
.param-group select,
#imageEndpoint,
#imageApiKey,
#llmEndpoint,
#llmApiKey,
#llmModel {
  width: 100%;
  border: 1px solid var(--border-soft);
  background: var(--bg-input);
  color: var(--text-primary);
  border-radius: 18px;
  padding: 14px 16px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.prompt-input,
.batch-prompt-input {
  resize: none;
  min-height: 120px;
  line-height: 1.7;
}

.batch-prompt-input {
  min-height: 76px;
}

.negative-prompt-input {
  width: 100%;
  min-height: 76px;
  resize: vertical;
  line-height: 1.7;
  border: 1px solid var(--border-soft);
  background: var(--bg-input);
  color: var(--text-primary);
  border-radius: 18px;
  padding: 14px 16px;
}

.prompt-input::placeholder,
.batch-prompt-input::placeholder,
.negative-prompt-input::placeholder,
input::placeholder {
  color: var(--text-placeholder);
}

.prompt-input:focus,
.batch-prompt-input:focus,
.negative-prompt-input:focus,
.param-group input:focus,
.param-group select:focus,
#imageEndpoint:focus,
#imageApiKey:focus,
#llmEndpoint:focus,
#llmApiKey:focus,
#llmModel:focus {
  outline: none;
  border-color: var(--border-strong);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.batch-prompts {
  display: grid;
  gap: 10px;
}

.batch-prompt-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: start;
}

.params-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  align-items: start;
}

.ratio-row {
  display: grid;
  gap: 12px;
}

.param-group {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.ratio-group {
  width: 100%;
}

.param-group label {
  font-size: 12px;
  color: var(--text-muted);
}

.ratio-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.ratio-option {
  min-width: 0;
  min-height: 54px;
  padding: 10px 12px;
  border-radius: 18px;
  border: 1px solid var(--border-soft);
  background: var(--bg-input);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.ratio-option:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.ratio-option.active {
  border-color: var(--border-strong);
  background: var(--accent-soft);
  color: var(--text-primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-soft) 70%, transparent);
}

.ratio-option-icon {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.ratio-rect {
  width: calc(var(--ratio-w) * 4px);
  height: calc(var(--ratio-h) * 4px);
  max-width: 22px;
  max-height: 22px;
  border-radius: 5px;
  border: 1.5px solid currentColor;
  background: color-mix(in srgb, currentColor 10%, transparent);
}

.btn {
  height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: var(--bg-subtle);
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, opacity 0.18s ease;
}

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

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-elevated);
}

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

:root[data-theme="dark"] .btn-primary {
  color: #111827;
}

.btn-outline {
  background: transparent;
  border-color: var(--border-soft);
  color: var(--text-secondary);
}

.btn-outline:hover {
  background: var(--accent-soft);
  color: var(--text-primary);
}

.btn-danger {
  background: transparent;
  border-color: rgba(220, 38, 38, 0.28);
  color: var(--danger);
}

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

.btn-sm {
  height: 36px;
  padding: 0 14px;
}

.backdrop {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  z-index: 39;
  backdrop-filter: blur(4px);
}

.config-panel {
  position: fixed;
  top: 20px;
  right: 20px;
  bottom: 20px;
  width: min(420px, calc(100vw - 32px));
  padding: 22px 22px 18px;
  border-radius: 28px;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-panel);
  z-index: 40;
  overflow: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

.config-panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 22px;
}

.config-panel-header h2 {
  margin: 0 0 8px;
  font-size: 22px;
}

.config-panel-header p,
.config-footer {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 13px;
}

.config-section {
  padding: 16px 0;
  border-top: 1px solid var(--border-soft);
}

.config-section:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.config-section h3 {
  margin: 0 0 14px;
  font-size: 16px;
}

.form-group {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

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

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

.password-wrap,
.model-input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

.toggle-vis-btn {
  border: 1px solid var(--border-soft);
  background: transparent;
  color: var(--text-secondary);
  height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  cursor: pointer;
}

.model-list {
  margin-top: 10px;
  display: grid;
  gap: 6px;
}

.model-item {
  padding: 12px 14px;
  border-radius: 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-soft);
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.model-item:hover {
  background: var(--accent-soft);
  border-color: var(--border-strong);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  padding: 24px;
  background: rgba(15, 23, 42, 0.68);
  display: grid;
  place-items: center;
  backdrop-filter: blur(8px);
}

.modal-content {
  position: relative;
  width: min(1120px, 100%);
  height: min(760px, calc(100vh - 48px));
  border-radius: 28px;
  overflow: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-panel);
}

.modal-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  height: 100%;
}

.modal-image-wrap {
  min-width: 0;
  min-height: 0;
  background: var(--bg-subtle);
  display: grid;
  place-items: center;
  padding: 24px;
  overflow: hidden;
}

.modal-image-stage {
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  padding: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-image-wrap img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  object-position: center;
  border-radius: 18px;
}

.modal-info {
  padding: 28px 22px 22px;
  display: grid;
  grid-template-rows: minmax(320px, 1fr) auto auto;
  gap: 18px;
  border-left: 1px solid var(--border-soft);
  min-height: 0;
}

.modal-info h4 {
  margin: 0 0 10px;
  font-size: 12px;
  color: var(--text-muted);
}

.modal-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.modal-section-head h4 {
  margin: 0;
}

.modal-prompt {
  min-height: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}

.modal-prompt-text,
.timestamp {
  margin: 0;
  line-height: 1.7;
  color: var(--text-secondary);
  word-break: break-word;
}

.modal-prompt-text {
  min-height: 0;
  overflow: auto;
  padding-right: 6px;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

.copy-prompt-btn {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: transparent;
  color: var(--text-secondary);
}

.copy-prompt-btn:hover {
  background: var(--accent-soft);
  color: var(--text-primary);
}

.copy-prompt-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  stroke: none;
}

.modal-params {
  display: grid;
  gap: 10px;
}

.param-list {
  display: grid;
  gap: 10px;
}

.param-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
}

.param-item-wide {
  align-items: flex-start;
  flex-direction: column;
}

.param-item-wide span:last-child {
  overflow-wrap: anywhere;
}

.param-label {
  color: var(--text-muted);
}

.modal-actions {
  margin-top: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding-top: 8px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 80;
  min-width: 220px;
  max-width: min(90vw, 820px);
  padding: 14px 18px;
  border-radius: 18px;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
  text-align: center;
  line-height: 1.6;
  white-space: pre-wrap;
}

.toast.top {
  top: 28px;
  bottom: auto;
}

.toast.error {
  background: color-mix(in srgb, var(--bg-panel) 82%, var(--danger-soft));
  border-color: color-mix(in srgb, var(--danger) 22%, var(--border-soft));
  color: var(--danger);
}

@media (max-width: 1180px) {
  #mainLayout {
    grid-template-columns: 1fr;
  }

  #inputArea {
    position: static;
  }

  #previewArea {
    min-height: auto;
  }
}

@media (max-width: 900px) {
  #app {
    padding: 14px;
  }

  #header {
    margin-bottom: 14px;
  }

  #previewArea,
  .composer-shell {
    padding: 18px;
  }

  .params-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .modal-body {
    grid-template-columns: 1fr;
  }

  .modal-info {
    border-left: 0;
    border-top: 1px solid var(--border-soft);
    grid-template-rows: minmax(220px, 1fr) auto auto;
  }
}

@media (max-width: 640px) {
  .brand-mark {
    width: 40px;
    height: 40px;
  }

  .logo {
    font-size: 22px;
  }

  .brand-subtitle {
    font-size: 12px;
  }

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

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

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

  .batch-prompt-row,
  .password-wrap,
  .model-input-row {
    grid-template-columns: 1fr;
  }

  .params-row,
  .modal-actions {
    grid-template-columns: 1fr;
  }

  .ratio-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .config-panel {
    top: 12px;
    right: 12px;
    bottom: 12px;
    left: 12px;
    width: auto;
    border-radius: 24px;
  }

  .modal-overlay {
    padding: 12px;
  }

  .modal-content {
    max-height: calc(100vh - 24px);
  }
}