/* Settings IA v2 — section-card primitives and Account/Security merge (R2-s02 U6). */

.settings-page-header {
  display: grid;
  grid-template-columns: calc(var(--tm-space-5) - var(--tm-space-1)) 1fr;
  align-items: start;
  gap: var(--tm-space-3);
  padding: var(--tm-space-1) var(--tm-space-1) var(--tm-space-2);
  min-width: 0;
}

.settings-page-header-icon {
  display: inline-flex;
  width: calc(var(--tm-space-5) - var(--tm-space-1));
  height: calc(var(--tm-space-5) - var(--tm-space-1));
  color: var(--tm-brand-purple);
}

.settings-page-header-icon svg {
  width: 100%;
  height: 100%;
}

.settings-page-header-copy {
  display: grid;
  gap: var(--tm-space-1);
  min-width: 0;
}

.settings-page-header-title {
  font-size: var(--tm-text-lg);
  line-height: var(--tm-leading-tight);
  font-weight: var(--tm-weight-semibold);
  color: var(--tm-text-primary);
}

.settings-page-header-subtitle {
  font-size: var(--tm-text-sm);
  line-height: var(--tm-leading-normal);
  color: var(--tm-text-secondary);
}

.settings-section-card {
  display: grid;
  gap: 0;
  background: var(--tm-surface-1);
  border: 1px solid var(--tm-border-default);
  border-radius: var(--tm-radius-xl);
  box-shadow: var(--tm-shadow-1);
  overflow: hidden;
}

.settings-section-card + .settings-section-card,
.settings-page-header + .settings-section-card {
  margin-top: var(--tm-space-3);
}

.settings-section-kicker {
  padding: var(--tm-space-3) var(--tm-space-4) var(--tm-space-1);
  font-size: var(--tm-text-2xs);
  line-height: var(--tm-leading-tight);
  font-weight: var(--tm-weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tm-text-muted);
}

.settings-section-row {
  display: grid;
  grid-template-columns: calc(var(--tm-space-5) - var(--tm-space-1)) minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--tm-space-3);
  min-height: 48px;
  width: 100%;
  padding: var(--tm-space-3) var(--tm-space-4);
  border: 0;
  border-top: 1px solid var(--tm-border-default);
  background: transparent;
  color: var(--tm-text-primary);
  font: inherit;
  text-align: left;
  min-width: 0;
}

.settings-section-row:first-child,
.settings-section-kicker + .settings-section-row {
  border-top: 0;
}

.settings-section-row--button {
  cursor: pointer;
}

.settings-section-row--button:hover {
  background: var(--tm-surface-2);
}

.settings-section-row--button:focus-visible {
  outline: var(--tm-focus-ring-outline);
  outline-offset: calc(var(--tm-space-1) * -1);
}

.settings-section-row-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: calc(var(--tm-space-5) - var(--tm-space-1));
  height: calc(var(--tm-space-5) - var(--tm-space-1));
  color: var(--tm-text-muted);
}

.settings-section-row-icon svg {
  width: calc(var(--tm-space-4) + var(--tm-space-1));
  height: calc(var(--tm-space-4) + var(--tm-space-1));
  stroke-width: 2;
}

.settings-section-row-copy {
  display: grid;
  gap: var(--tm-space-1);
  min-width: 0;
}

.settings-section-row-title {
  font-size: var(--tm-text-md);
  line-height: var(--tm-leading-tight);
  font-weight: var(--tm-weight-medium);
  color: var(--tm-text-primary);
  min-width: 0;
}

.settings-section-row-desc {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  font-size: var(--tm-text-sm);
  line-height: var(--tm-leading-snug);
  color: var(--tm-text-secondary);
  overflow: hidden;
  text-overflow: clip;
  white-space: normal;
  min-width: 0;
}

.settings-section-row-tail {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--tm-space-2);
  min-width: 0;
}

.settings-section-row-chevron {
  color: var(--tm-text-muted);
  line-height: var(--tm-leading-none);
}

.settings-section-row--danger .settings-section-row-title {
  color: var(--tm-status-danger-fg);
}

.settings-section-switch {
  position: relative;
  width: 40px;
  height: 22px;
  border: 1px solid var(--tm-border-default);
  border-radius: var(--tm-radius-full);
  background: var(--tm-surface-2);
  transition: background var(--tm-dur-fast) var(--tm-ease-out),
    border-color var(--tm-dur-fast) var(--tm-ease-out);
}

.settings-section-switch::after {
  content: "";
  position: absolute;
  top: 1px;
  left: 1px;
  width: 18px;
  height: 18px;
  border-radius: var(--tm-radius-full);
  background: var(--tm-surface-1);
  box-shadow: var(--tm-shadow-1);
  transition: transform var(--tm-dur-fast) var(--tm-ease-out);
}

.settings-section-switch[aria-checked="true"] {
  background: var(--tm-brand-purple);
  border-color: var(--tm-brand-purple);
}

.settings-section-switch[aria-checked="true"]::after {
  transform: translateX(18px);
}

.settings-section-switch--disabled {
  background: var(--tm-surface-1);
}

.settings-section-select {
  appearance: none;
  min-height: 40px;
  padding: var(--tm-space-2) calc(var(--tm-space-5) + var(--tm-space-1)) var(--tm-space-2) var(--tm-space-3);
  border: 1px solid var(--tm-border-default);
  border-radius: var(--tm-radius-lg);
  color: var(--tm-text-primary);
  background:
    linear-gradient(45deg, transparent 50%, var(--tm-text-muted) 50%) calc(100% - var(--tm-space-4)) 50% / var(--tm-space-1) var(--tm-space-1) no-repeat,
    var(--tm-surface-1);
  font: inherit;
}

.settings-section-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  min-height: calc(var(--tm-space-4) + var(--tm-space-1));
  padding: var(--tm-space-1) var(--tm-space-2);
  border-radius: var(--tm-radius-full);
  font-size: var(--tm-text-2xs);
  line-height: var(--tm-leading-tight);
  font-weight: var(--tm-weight-semibold);
  white-space: nowrap;
}

.settings-section-badge--coming-soon {
  background: var(--tm-surface-2);
  color: var(--tm-text-muted);
}

.settings-section-badge--tier {
  background: var(--tm-brand-purple-alpha-10);
  color: var(--tm-brand-purple);
}

/* §4.7 A · tier 徽标档位色泽（free 中性 / plus 紫 10% / pro 紫渐变描边 / max 紫金渐变） */
.settings-section-badge--tier.settings-section-badge--free {
  background: var(--tm-surface-2);
  color: var(--tm-text-muted);
}

.settings-section-badge--tier.settings-section-badge--plus {
  background: var(--tm-brand-purple-alpha-10);
  color: var(--tm-brand-purple);
}

.settings-section-badge--tier.settings-section-badge--pro {
  border: 1px solid transparent;
  background:
    linear-gradient(var(--tm-surface-1), var(--tm-surface-1)) padding-box,
    linear-gradient(135deg, var(--tm-brand-purple), var(--tm-brand-purple-dark)) border-box;
  color: var(--tm-brand-purple);
}

.settings-section-badge--tier.settings-section-badge--max {
  border: 1px solid transparent;
  background:
    linear-gradient(135deg,
      color-mix(in srgb, var(--tm-brand-purple) 10%, var(--tm-surface-1)),
      color-mix(in srgb, var(--tm-brand-orange) 12%, var(--tm-surface-1))) padding-box,
    linear-gradient(135deg, var(--tm-brand-purple), var(--tm-brand-orange)) border-box;
  color: var(--tm-text-primary);
}

.settings-section-embedded {
  min-width: 0;
  padding: var(--tm-space-3) var(--tm-space-4);
  border-top: 1px solid var(--tm-border-default);
}

.settings-section-kicker + .settings-section-embedded {
  border-top: 0;
}

.settings-section-embedded .compact-setting-item,
.settings-section-embedded .task-sound-row,
.settings-section-embedded .task-sound-field,
.settings-section-embedded .task-sound-actions,
.settings-section-embedded .storage-path-row,
.settings-section-embedded .storage-pills,
.settings-section-embedded .storage-actions {
  min-width: 0;
}

.settings-capability-detail {
  border-top: 1px solid var(--tm-border-default);
}

.settings-capability-detail:first-child {
  border-top: 0;
}

.settings-capability-detail > summary {
  list-style: none;
}

.settings-capability-detail > summary::-webkit-details-marker {
  display: none;
}

.settings-capability-detail .settings-section-row {
  border-top: 0;
}

.settings-capability-desc {
  padding: 0 var(--tm-space-4) var(--tm-space-4) calc(var(--tm-space-4) + var(--tm-space-5) + var(--tm-space-3));
  color: var(--tm-text-secondary);
  font-size: var(--tm-text-sm);
  line-height: var(--tm-leading-normal);
}

/* Settings selection and confirm dialogs. */
.settings-dialog-overlay {
  position: absolute;
  inset: 0;
  z-index: var(--tm-z-raised);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--tm-space-3);
  background: transparent;
  transition: background var(--tm-dur-fast) var(--tm-ease-out);
  outline: none;
}

.settings-dialog-overlay.is-open {
  background: var(--tm-overlay-modal);
}

.settings-dialog-overlay.is-closing {
  background: transparent;
}

.settings-dialog-card {
  width: 80%;
  max-width: 320px;
  max-height: min(70vh, calc(100% - var(--tm-space-5)));
  overflow-y: auto;
  background: var(--tm-surface-1);
  border: 1px solid var(--tm-border-default);
  border-radius: var(--tm-radius-xl);
  padding: var(--tm-space-5) var(--tm-space-1) var(--tm-space-3);
  box-shadow: var(--tm-shadow-float);
  opacity: 0;
  transform: translateY(var(--tm-space-2)) scale(0.98);
  transition: opacity var(--tm-dur-fast) var(--tm-ease-out),
    transform var(--tm-dur-fast) var(--tm-ease-out);
}

.settings-dialog-overlay.is-open .settings-dialog-card {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.settings-dialog-overlay.is-closing .settings-dialog-card {
  opacity: 0;
  transform: translateY(var(--tm-space-2)) scale(0.98);
}

.settings-dialog-title {
  padding: 0 var(--tm-space-4) var(--tm-space-3);
  font-size: var(--tm-text-base);
  line-height: var(--tm-leading-tight);
  font-weight: var(--tm-weight-semibold);
  color: var(--tm-text-primary);
}

.settings-dialog-group-title {
  padding: var(--tm-space-2) var(--tm-space-4) var(--tm-space-1);
  font-size: var(--tm-text-2xs);
  line-height: var(--tm-leading-tight);
  font-weight: var(--tm-weight-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tm-text-muted);
}

.settings-dialog-divider {
  height: 1px;
  margin: var(--tm-space-2) var(--tm-space-4);
  background: var(--tm-border-default);
}

.settings-dialog-option {
  display: flex;
  align-items: center;
  gap: var(--tm-space-3);
  width: 100%;
  padding: var(--tm-space-3) var(--tm-space-4);
  border: none;
  background: transparent;
  font-size: var(--tm-text-md);
  color: var(--tm-text-primary);
  cursor: pointer;
  border-radius: var(--tm-radius-md);
  transition: background var(--tm-dur-instant) var(--tm-ease-out),
    color var(--tm-dur-instant) var(--tm-ease-out);
}

.settings-dialog-option:hover {
  background: var(--tm-brand-purple-alpha-08);
}

.settings-dialog-option.active {
  color: var(--tm-brand-purple);
  font-weight: var(--tm-weight-medium);
}

.settings-dialog-option-icon {
  flex-shrink: 0;
  width: calc(var(--tm-space-4) + var(--tm-space-1));
  height: calc(var(--tm-space-4) + var(--tm-space-1));
  display: flex;
  align-items: center;
  color: var(--tm-text-muted);
}

.settings-dialog-option.active .settings-dialog-option-icon,
.settings-dialog-option-check {
  color: var(--tm-brand-purple);
}

.settings-dialog-option-label {
  flex: 1;
  text-align: left;
}

.settings-dialog-option-check {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.settings-confirm-card {
  width: 88%;
  max-width: 320px;
  padding: var(--tm-space-5) var(--tm-space-5) var(--tm-space-4);
}

.settings-confirm-title {
  margin-bottom: var(--tm-space-2);
  font-size: var(--tm-text-base);
  line-height: var(--tm-leading-tight);
  font-weight: var(--tm-weight-semibold);
  color: var(--tm-text-primary);
}

.settings-confirm-message {
  margin-bottom: var(--tm-space-4);
  font-size: var(--tm-text-md);
  line-height: var(--tm-leading-normal);
  color: var(--tm-text-secondary);
}

.settings-confirm-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--tm-space-2);
  flex-wrap: wrap;
}

.settings-confirm-actions > button {
  flex: 1 1 112px;
  min-width: 112px;
  white-space: normal;
  overflow-wrap: break-word;
}

@media (prefers-reduced-motion: reduce) {
  .settings-dialog-overlay,
  .settings-dialog-card,
  .settings-section-switch,
  .settings-section-switch::after,
  .settings-about-mark svg path {
    transition: none;
    animation: none;
    stroke-dashoffset: 0;
  }
}

html[data-motion="reduced"] .settings-about-mark svg path {
  animation: none;
  stroke-dashoffset: 0;
}

.settings-list-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tm-space-3);
  width: 100%;
  min-height: 48px;
  padding: var(--tm-space-3) var(--tm-space-4);
  background: transparent;
  border: 0;
  border-top: 1px solid var(--tm-border-default);
  text-align: left;
  font-family: inherit;
  cursor: pointer;
  color: var(--settings-text);
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.settings-list-row:first-child {
  border-top: 0;
}

.settings-list-row--static {
  cursor: default;
}

.settings-list-row--action:hover {
  background: var(--tm-surface-2);
}

.settings-list-row--action:focus-visible {
  outline: var(--tm-focus-ring-outline);
  outline-offset: calc(var(--tm-space-1) * -1);
  border-radius: var(--tm-radius-xs);
}

.settings-list-row-label {
  flex: 1;
  font-size: var(--tm-text-base);
  font-weight: var(--tm-weight-medium);
  color: var(--settings-text);
  min-width: 0;
}

.settings-list-row-value {
  font-size: var(--tm-text-base);
  color: var(--settings-subtle);
  text-align: right;
  white-space: nowrap;
  max-width: 60%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.settings-list-row-chevron {
  flex-shrink: 0;
  color: var(--settings-muted);
  font-size: var(--tm-text-lg);
  line-height: var(--tm-leading-none);
}

.settings-list-row--destructive .settings-list-row-label {
  color: var(--tm-status-danger-fg);
}

.settings-account-identity-card {
  padding: 0;
}

.settings-account-summary {
  display: grid;
  grid-template-columns: calc(var(--tm-space-6) + var(--tm-space-2)) minmax(0, 1fr);
  align-items: center;
  gap: var(--tm-space-3);
  padding: var(--tm-space-4);
}

.settings-account-avatar {
  width: calc(var(--tm-space-6) + var(--tm-space-2));
  height: calc(var(--tm-space-6) + var(--tm-space-2));
  border-radius: var(--tm-radius-full);
  background: var(--tm-brand-purple);
  color: var(--tm-text-on-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--tm-text-lg);
  font-weight: var(--tm-weight-semibold);
  box-shadow: var(--tm-shadow-2);
}

.settings-account-identity-text {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--tm-space-2);
  flex-wrap: wrap;
  flex: 1;
  min-width: 0;
}

.settings-account-email {
  flex: 1 1 auto;
  min-width: 0;
  font-size: var(--tm-text-base);
  font-weight: var(--tm-weight-semibold);
  color: var(--tm-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.settings-account-id-value {
  font-family: var(--tm-font-mono);
  font-size: var(--tm-text-md);
  color: var(--tm-text-secondary);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.settings-account-profile-editor {
  border-top: 1px solid var(--tm-border-default);
}

.settings-account-profile-editor > summary {
  list-style: none;
}

.settings-account-profile-editor > summary::-webkit-details-marker {
  display: none;
}

.settings-account-profile-editor[open] .settings-account-profile-summary .settings-section-row-chevron {
  transform: rotate(90deg);
}

.settings-account-profile-summary .settings-section-row-chevron {
  transition: transform var(--tm-dur-fast) var(--tm-ease-out);
}

.settings-profile-card--inline {
  display: grid;
  gap: var(--tm-space-3);
  padding: 0 var(--tm-space-4) var(--tm-space-4);
}

.settings-about-brand {
  display: grid;
  grid-template-columns: calc(var(--tm-space-6) + var(--tm-space-4)) minmax(0, 1fr);
  gap: var(--tm-space-1);
  align-items: center;
  padding: var(--tm-space-4) var(--tm-space-4) var(--tm-space-2);
}

.settings-about-mark {
  grid-row: span 2;
  display: inline-flex;
  width: calc(var(--tm-space-6) + var(--tm-space-4));
  height: calc(var(--tm-space-6) + var(--tm-space-4));
  color: var(--tm-brand-purple);
}

.settings-about-mark svg {
  width: 100%;
  height: 100%;
}

.settings-about-mark svg path {
  stroke-dasharray: 72;
  stroke-dashoffset: 72;
  animation: tm-about-mark-draw var(--tm-dur-slow) var(--tm-ease-out) forwards;
}

@keyframes tm-about-mark-draw {
  to {
    stroke-dashoffset: 0;
  }
}

.settings-about-name {
  font-size: var(--tm-text-lg);
  line-height: var(--tm-leading-tight);
  font-weight: var(--tm-weight-semibold);
  color: var(--tm-text-primary);
}

.settings-about-tagline {
  font-size: var(--tm-text-sm);
  line-height: var(--tm-leading-normal);
  color: var(--tm-text-secondary);
}

.settings-section-row-value {
  font-size: var(--tm-text-sm);
  line-height: var(--tm-leading-tight);
  color: var(--tm-text-secondary);
  font-family: var(--tm-font-mono);
}

/* R2-s02 U8 Settings Impress — bento hub, elevated focus cards, and F3 cascade. */
.settings-overview--bento,
.settings-hub-overview.settings-overview--bento {
  display: grid;
  gap: var(--tm-space-3);
}

.settings-bento-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--tm-space-3);
  min-width: 0;
}

.settings-bento-card {
  --settings-card-hue: var(--tm-brand-purple);
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--settings-card-hue) 18%, var(--tm-glass-border));
  border-radius: var(--tm-radius-xl);
  background:
    linear-gradient(135deg,
      color-mix(in srgb, var(--settings-card-hue) 8%, var(--tm-glass-bg-strong)),
      color-mix(in srgb, var(--settings-card-hue) 2%, var(--tm-surface-1)));
  box-shadow: var(--tm-shadow-2), var(--tm-glass-highlight);
}

.settings-bento-card::before,
.settings-section-card--elevated::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(135deg,
      color-mix(in srgb, var(--settings-card-hue, var(--settings-page-hue, var(--tm-brand-purple))) 4%, transparent) 0 1px,
      transparent 1px var(--tm-space-3));
  opacity: 0.28;
}

.settings-bento-card--account {
  --settings-card-hue: var(--tm-brand-purple);
  grid-column: 1 / -1;
}

.settings-bento-card--subscription {
  --settings-card-hue: var(--tm-brand-purple);
}

.settings-bento-card.settings-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-content: space-between;
  gap: var(--tm-space-2);
  min-height: calc(var(--tm-space-6) * 3);
  padding: var(--tm-space-4);
  border-color: color-mix(in srgb, var(--settings-card-hue) 18%, var(--tm-glass-border));
  color: var(--tm-text-primary);
  text-align: left;
}

.settings-bento-card.settings-row:hover {
  background:
    linear-gradient(135deg,
      color-mix(in srgb, var(--settings-card-hue) 12%, var(--tm-glass-bg-strong)),
      color-mix(in srgb, var(--settings-card-hue) 4%, var(--tm-surface-1)));
}

.settings-bento-card-kicker {
  font-size: var(--tm-text-2xs);
  line-height: var(--tm-leading-tight);
  font-weight: var(--tm-weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tm-text-muted);
}

.settings-subscription-summary-card.settings-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  align-content: center;
  gap: var(--tm-space-3);
  min-height: var(--tm-settings-row-touch);
  padding: var(--tm-space-3) var(--tm-space-4);
}

.settings-subscription-summary-copy {
  min-width: 0;
}

.settings-subscription-summary-email {
  display: block;
  min-width: 0;
  overflow: hidden;
  color: var(--tm-text-primary);
  font-size: var(--tm-text-base);
  font-weight: var(--tm-weight-semibold);
  line-height: var(--tm-leading-tight);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.settings-row--with-tail {
  grid-template-columns: calc(var(--tm-space-6) - var(--tm-space-1)) minmax(0, 1fr) auto auto;
}

.settings-row-reading {
  justify-self: end;
  color: var(--tm-text-muted);
  font-family: var(--tm-font-mono);
  font-size: var(--tm-text-xs);
  font-weight: var(--tm-weight-semibold);
  line-height: var(--tm-leading-tight);
}

.settings-row-reading--warning {
  color: var(--tm-status-warning);
}

.settings-row-reading--danger {
  color: var(--tm-status-danger);
}

.settings-hub-banner {
  display: grid;
  gap: var(--tm-space-2);
  align-items: start;
  padding: var(--tm-space-4);
  border-radius: var(--tm-radius-xl);
}

.settings-hub-banner-title {
  margin: 0;
  color: var(--tm-text-primary);
  font-size: var(--tm-text-lg);
  font-weight: var(--tm-weight-semibold);
  line-height: var(--tm-leading-tight);
}

.settings-hub-banner-subtitle {
  margin: 0;
  color: var(--tm-text-secondary);
  font-size: var(--tm-text-sm);
  line-height: var(--tm-leading-normal);
}

.settings-hub-banner-cta {
  justify-self: start;
  margin-top: var(--tm-space-1);
}

.settings-hub-locked-row {
  cursor: pointer;
}

.settings-hub-locked-row:hover .settings-row-icon,
.settings-hub-locked-row:focus-visible .settings-row-icon {
  color: var(--tm-brand-purple);
}

.settings-hub-locked-row-lock {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: calc(var(--tm-space-4) + var(--tm-space-1));
  height: calc(var(--tm-space-4) + var(--tm-space-1));
  color: var(--tm-brand-purple);
}

.settings-hub-locked-row-lock svg {
  width: var(--tm-space-4);
  height: var(--tm-space-4);
}

.settings-section-embedded .compact-setting-select,
.settings-section-embedded .compact-setting-input,
.settings-section-embedded .task-sound-input,
.settings-section-embedded .storage-path-row,
.settings-section-embedded .storage-btn,
.settings-section-embedded .task-sound-btn {
  border: 1px solid var(--tm-border-default);
  border-radius: var(--tm-radius-md);
  background: var(--tm-surface-2);
  color: var(--tm-text-primary);
  transition: border-color var(--tm-dur-fast) var(--tm-ease-out),
    box-shadow var(--tm-dur-fast) var(--tm-ease-out),
    background var(--tm-dur-fast) var(--tm-ease-out),
    color var(--tm-dur-fast) var(--tm-ease-out);
}

.settings-section-embedded .compact-setting-select:hover,
.settings-section-embedded .compact-setting-input:hover,
.settings-section-embedded .storage-btn:hover,
.settings-section-embedded .task-sound-btn:hover {
  border-color: var(--tm-border-soft);
  background: var(--tm-surface-3);
  color: var(--tm-text-primary);
}

.settings-section-embedded .compact-setting-select:focus,
.settings-section-embedded .compact-setting-input:focus,
.settings-section-embedded .task-sound-input:focus {
  border-color: var(--tm-brand-purple);
  box-shadow: var(--tm-focus-ring);
}

.settings-section-embedded .task-sound-btn.secondary,
.settings-section-embedded .storage-btn-secondary,
.settings-section-embedded .storage-btn-copy {
  background: transparent;
  color: var(--tm-text-secondary);
}

.settings-section-embedded .task-sound-label,
.settings-section-embedded .compact-setting-label-desc,
.settings-section-embedded .task-sound-note,
.settings-section-embedded .storage-path-value {
  color: var(--tm-text-secondary);
}

.settings-section-embedded .compact-setting-label-text,
.settings-section-embedded .task-sound-toggle {
  color: var(--tm-text-primary);
}

.settings-section-embedded .compact-settings-divider {
  background: var(--tm-border-default);
}

.settings-section-embedded .task-sound-status,
.settings-section-embedded .storage-pill-default {
  background: var(--tm-surface-2);
  color: var(--tm-text-muted);
}

.settings-section-embedded .task-sound-status.on,
.settings-section-embedded .storage-pill-ok {
  background: color-mix(in srgb, var(--tm-brand-green) 12%, var(--tm-surface-1));
  color: var(--tm-brand-green);
}

.settings-section-embedded .task-sound-status.saving,
.settings-section-embedded .storage-pill-custom {
  background: var(--tm-brand-purple-alpha-10);
  color: var(--tm-brand-purple);
}

.settings-section-embedded .task-sound-status.error,
.settings-section-embedded .storage-pill-warn {
  background: color-mix(in srgb, var(--tm-brand-orange) 12%, var(--tm-surface-1));
  color: var(--tm-brand-orange);
}

.auth-panel-btn.settings-secondary-btn {
  border: 1px solid var(--tm-border-default);
  border-radius: var(--tm-radius-lg);
  background: var(--tm-surface-2);
  color: var(--tm-text-primary);
  box-shadow: var(--tm-shadow-1);
}

.auth-panel-btn.settings-secondary-btn:hover {
  border-color: var(--tm-border-soft);
  background: var(--tm-surface-3);
  color: var(--tm-text-primary);
}

.settings-page-header {
  grid-template-columns: calc(var(--tm-space-6) + var(--tm-space-2)) minmax(0, 1fr);
  gap: var(--tm-space-3);
  padding: var(--tm-space-2) var(--tm-space-1) var(--tm-space-3);
}

.settings-subpage {
  --settings-page-hue: var(--tm-brand-purple);
  --settings-card-hue: var(--settings-page-hue);
}

.settings-subpage--account,
.settings-subpage--subscription {
  --settings-page-hue: var(--tm-brand-purple);
}

.settings-subpage--usage {
  --settings-page-hue: var(--tm-brand-green);
}

.settings-subpage--preferences {
  --settings-page-hue: var(--tm-brand-blue);
}

.settings-subpage--capabilities {
  --settings-page-hue: var(--tm-brand-orange);
}

.settings-subpage--help {
  --settings-page-hue: var(--tm-text-muted);
}

.settings-subpage--about {
  --settings-page-hue: var(--tm-text-muted);
}

/* R2-s03 U9 W5 Credits Center — usage subpage v2. */
.settings-usage-page {
  display: grid;
  gap: var(--tm-space-3);
}

.settings-usage-plan-card,
.settings-usage-topup-card,
.settings-usage-trial-row,
.settings-usage-how,
.settings-usage-activity {
  min-width: 0;
}

.settings-usage-plan-card,
.settings-usage-topup-card {
  display: grid;
  gap: var(--tm-space-3);
  width: 100%;
  padding: var(--tm-space-4);
  border: 1px solid var(--tm-border-default);
  border-radius: var(--tm-radius-xl);
  color: var(--tm-text-primary);
  font: inherit;
  text-align: left;
}

button.settings-usage-plan-card {
  cursor: pointer;
}

button.settings-usage-plan-card[aria-disabled="true"] {
  cursor: default;
}

.settings-usage-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tm-space-3);
  min-width: 0;
}

.settings-usage-kicker {
  min-width: 0;
  color: var(--tm-text-muted);
  font-size: var(--tm-text-2xs);
  font-weight: var(--tm-weight-semibold);
  line-height: var(--tm-leading-tight);
  letter-spacing: 0;
  text-transform: uppercase;
}

.settings-usage-main-number {
  display: inline-flex;
  align-items: baseline;
  gap: calc(var(--tm-space-1) / 2);
  min-width: 0;
  color: var(--tm-text-primary);
  font-family: var(--tm-font-mono);
  font-size: var(--tm-text-2xl);
  font-weight: var(--tm-weight-semibold);
  line-height: var(--tm-leading-none);
}

.settings-usage-main-unit,
.settings-usage-main-total {
  color: var(--tm-text-secondary);
  font-size: var(--tm-text-lg);
  font-weight: var(--tm-weight-medium);
}

.settings-usage-meter {
  display: block;
  width: 100%;
  height: var(--tm-radius-md);
  overflow: hidden;
  border-radius: var(--tm-radius-full);
  background: var(--tm-surface-2);
}

.settings-usage-meter-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--tm-brand-purple), var(--tm-brand-purple-dark));
  transition: width var(--tm-dur-slow) var(--tm-ease-expo);
}

.settings-usage-meter[data-meter-state="unavailable"] .settings-usage-meter-fill {
  opacity: 0;
}

.settings-usage-meter[data-usage-status="warning"] .settings-usage-meter-fill {
  background: linear-gradient(90deg, var(--tm-status-warning), var(--tm-brand-orange));
}

.settings-usage-meter[data-usage-status="danger"] .settings-usage-meter-fill {
  background: linear-gradient(90deg, var(--tm-status-danger), var(--tm-status-warning));
}

.settings-usage-plan-card--danger .settings-usage-meter {
  background: color-mix(in srgb, var(--tm-status-danger) 24%, var(--tm-surface-2));
  animation: tm-usage-danger-pulse var(--tm-dur-deliberate) var(--tm-ease-out) 2 both;
}

.settings-usage-status,
.settings-usage-plan-reset,
.settings-usage-plan-exact,
.settings-usage-topup-note {
  font-size: var(--tm-text-sm);
  line-height: var(--tm-leading-snug);
}

.settings-usage-status--warning {
  color: var(--tm-status-warning-fg);
}

.settings-usage-status--danger {
  color: var(--tm-status-danger-fg);
}

.settings-usage-plan-reset,
.settings-usage-topup-note {
  color: var(--tm-text-secondary);
}

.settings-usage-plan-exact {
  color: var(--tm-text-secondary);
  font-family: var(--tm-font-mono);
  animation: tm-usage-detail-in var(--tm-dur-fast) var(--tm-ease-out) both;
}

.settings-usage-plan-card.settings-section-card--elevated {
  --settings-card-hue: var(--tm-text-muted);
  border-color: var(--tm-border-default);
  background:
    linear-gradient(135deg,
      color-mix(in srgb, var(--tm-brand-green) 3%, var(--tm-surface-1)),
      var(--tm-surface-1));
}

.settings-usage-plan-card--warning.settings-section-card--elevated {
  --settings-card-hue: var(--tm-status-warning);
  border-color: color-mix(in srgb, var(--tm-status-warning) 34%, var(--tm-border-default));
  background:
    linear-gradient(135deg,
      color-mix(in srgb, var(--tm-status-warning) 9%, var(--tm-surface-1)),
      var(--tm-surface-1));
}

.settings-usage-plan-card--danger.settings-section-card--elevated {
  --settings-card-hue: var(--tm-status-danger);
  border-color: color-mix(in srgb, var(--tm-status-danger) 42%, var(--tm-border-default));
  background:
    linear-gradient(135deg,
      color-mix(in srgb, var(--tm-status-danger) 11%, var(--tm-surface-1)),
      var(--tm-surface-1));
}

.settings-usage-plan-card--danger .settings-usage-status {
  margin-block: var(--tm-space-1);
}

.settings-usage-topup-card {
  background:
    linear-gradient(135deg,
      color-mix(in srgb, var(--tm-brand-green) 6%, var(--tm-surface-1)),
      var(--tm-surface-1));
}

.settings-usage-buy-credits-btn {
  min-height: calc(var(--tm-space-6) + var(--tm-space-4));
  padding: var(--tm-space-2) var(--tm-space-3);
  border-color: color-mix(in srgb, var(--tm-brand-purple) 28%, var(--tm-border-default));
  background: color-mix(in srgb, var(--tm-brand-purple) 10%, transparent);
  color: var(--tm-brand-purple);
  justify-content: center;
}

.settings-usage-buy-credits-btn:hover {
  background: color-mix(in srgb, var(--tm-brand-purple) 14%, transparent);
  color: var(--tm-brand-purple);
}

.settings-usage-topup-value {
  display: inline-flex;
  align-items: center;
  gap: var(--tm-space-2);
  min-width: 0;
}

.settings-usage-topup-number,
.settings-usage-trial-value {
  color: var(--tm-text-primary);
  font-family: var(--tm-font-mono);
  font-weight: var(--tm-weight-semibold);
  line-height: var(--tm-leading-none);
}

.settings-usage-topup-number {
  font-size: var(--tm-text-xl);
}

.settings-usage-topup-bolt {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--tm-space-4);
  height: var(--tm-space-4);
  color: var(--tm-brand-orange);
}

.settings-usage-topup-bolt svg {
  width: var(--tm-space-4);
  height: var(--tm-space-4);
}

.settings-usage-trial-row {
  display: grid;
  gap: var(--tm-space-3);
  padding: var(--tm-space-3) var(--tm-space-4);
  border: 1px solid color-mix(in srgb, var(--tm-brand-orange) 24%, var(--tm-border-default));
  border-radius: var(--tm-radius-lg);
  background: color-mix(in srgb, var(--tm-brand-orange) 8%, var(--tm-surface-1));
}

.settings-usage-trial-copy {
  display: grid;
  gap: var(--tm-space-1);
  min-width: 0;
}

.settings-usage-trial-value {
  font-size: var(--tm-text-lg);
}

.settings-usage-trial-bar {
  display: block;
  height: calc(var(--tm-space-1) / 2);
  overflow: hidden;
  border-radius: var(--tm-radius-full);
  background: color-mix(in srgb, var(--tm-brand-orange) 18%, var(--tm-surface-2));
}

.settings-usage-trial-bar span {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--tm-status-warning), var(--tm-brand-orange));
}

.settings-usage-how {
  overflow: hidden;
}

.settings-usage-how summary {
  list-style: none;
}

.settings-usage-how summary::-webkit-details-marker {
  display: none;
}

.settings-usage-how[open] .settings-section-row-chevron {
  transform: rotate(90deg);
}

.settings-usage-how-body {
  padding: var(--tm-space-3) var(--tm-space-4) var(--tm-space-4) calc(var(--tm-space-4) + var(--tm-space-5) + var(--tm-space-3));
  color: var(--tm-text-secondary);
  font-size: var(--tm-text-sm);
  line-height: var(--tm-leading-normal);
}

.settings-usage-activity[hidden] {
  display: none;
}

@keyframes tm-usage-danger-pulse {
  50% {
    filter: saturate(1.08) brightness(1.04);
  }
}

/* F3 registration: tm-usage-detail-in, opacity + small translate, reduce = none. */
@keyframes tm-usage-detail-in {
  from {
    opacity: 0;
    transform: translateY(calc(var(--tm-space-1) / 2));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .settings-usage-meter-fill,
  .settings-usage-plan-exact,
  .settings-usage-plan-card--danger .settings-usage-meter {
    animation: none;
    transition: none;
  }
}

html[data-motion="reduced"] .settings-usage-meter-fill,
html[data-motion="reduced"] .settings-usage-plan-exact,
html[data-motion="reduced"] .settings-usage-plan-card--danger .settings-usage-meter {
  animation: none;
  transition: none;
}

.settings-page-header-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: calc(var(--tm-space-6) + var(--tm-space-2));
  height: calc(var(--tm-space-6) + var(--tm-space-2));
  border: 1px solid color-mix(in srgb, var(--settings-page-hue, var(--tm-brand-purple)) 24%, var(--tm-glass-border));
  border-radius: var(--tm-radius-lg);
  background:
    linear-gradient(135deg,
      color-mix(in srgb, var(--settings-page-hue, var(--tm-brand-purple)) 15%, var(--tm-surface-1)),
      color-mix(in srgb, var(--settings-page-hue, var(--tm-brand-purple)) 8%, var(--tm-surface-1)));
  color: var(--settings-page-hue, var(--tm-brand-purple));
  box-shadow: var(--tm-shadow-1), var(--tm-glass-highlight);
}

.settings-page-header-icon svg {
  width: calc(var(--tm-space-4) + var(--tm-space-1));
  height: calc(var(--tm-space-4) + var(--tm-space-1));
}

.settings-page-header-title {
  font-size: var(--tm-text-xl);
}

.settings-page-header-subtitle {
  line-height: var(--tm-leading-snug);
}

.settings-section-card,
.settings-detail-card {
  position: relative;
}

.settings-section-card--elevated {
  --settings-card-hue: var(--settings-page-hue, var(--tm-brand-purple));
  overflow: hidden;
  border-color: color-mix(in srgb, var(--settings-card-hue) 22%, var(--tm-glass-border));
  background:
    linear-gradient(135deg,
      color-mix(in srgb, var(--settings-card-hue) 7%, var(--tm-surface-1)),
      color-mix(in srgb, var(--settings-card-hue) 2%, var(--tm-surface-1)));
  box-shadow: var(--tm-shadow-2), var(--tm-glass-highlight);
}

.settings-section-row,
.settings-list-row,
.settings-hub-locked-row {
  min-height: var(--tm-settings-row-touch);
}

.settings-section-kicker {
  padding-top: var(--tm-space-4);
}

.settings-stat-value,
.settings-plan-value-price,
.settings-list-row-value,
.settings-section-row-value {
  font-family: var(--tm-font-mono);
}

.settings-section-row-chevron,
.settings-list-row-chevron,
.settings-row-chevron {
  transition: transform var(--tm-dur-fast) var(--tm-ease-out),
    color var(--tm-dur-fast) var(--tm-ease-out);
}

.settings-search {
  align-items: center;
}

.settings-search-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
}

.settings-section-row-icon,
.settings-row-icon {
  transition: color var(--tm-dur-fast) var(--tm-ease-out);
}

.settings-section-switch::after {
  transition: transform var(--tm-dur-fast) var(--tm-ease-spring);
}

.settings-section-switch[aria-checked="true"]::after {
  transform: translateX(18px) scale(1.06);
}

.settings-section-badge--coming-soon {
  position: relative;
  overflow: hidden;
}

.settings-section-badge--coming-soon::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-120%);
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--tm-text-primary) 14%, transparent), transparent);
  opacity: 0;
}

.settings-section-badge--coming-soon:hover::after {
  animation: tm-settings-shimmer var(--tm-dur-slow) var(--tm-ease-out) both;
}

.settings-empty {
  display: grid;
  gap: var(--tm-space-2);
  min-height: calc(var(--tm-space-6) * 2);
  place-items: center;
  padding: var(--tm-space-5) var(--tm-space-4);
  color: var(--tm-text-secondary);
  text-align: center;
}

.settings-empty--loading {
  position: relative;
  overflow: hidden;
  border-radius: var(--tm-radius-lg);
  background: linear-gradient(90deg, var(--tm-surface-1), var(--tm-surface-2), var(--tm-surface-1));
  background-size: 200% 100%;
  animation: tm-settings-skeleton var(--tm-dur-slow) var(--tm-ease-out) both;
}

/* F3 registration: tm-settings-cascade, 30ms/card stagger；时长取 fast 档，
   末卡（150ms 延迟）恰在 300ms 总预算内收尾（§4.7 D 硬预算）。 */
.settings-subpage[data-anim-enter] .settings-page-header,
.settings-subpage[data-anim-enter] .settings-section-card,
.settings-subpage[data-anim-enter] .settings-detail-card,
.settings-subpage[data-anim-enter] .settings-list-row--action {
  animation: tm-settings-cascade var(--tm-dur-fast) var(--tm-ease-out) both;
}

.settings-subpage[data-anim-enter] .settings-page-header {
  animation-delay: 0ms;
}

.settings-subpage[data-anim-enter] .settings-section-card:nth-of-type(1),
.settings-subpage[data-anim-enter] .settings-detail-card:nth-of-type(1) {
  animation-delay: 30ms;
}

.settings-subpage[data-anim-enter] .settings-section-card:nth-of-type(2),
.settings-subpage[data-anim-enter] .settings-detail-card:nth-of-type(2) {
  animation-delay: 60ms;
}

.settings-subpage[data-anim-enter] .settings-section-card:nth-of-type(3),
.settings-subpage[data-anim-enter] .settings-detail-card:nth-of-type(3) {
  animation-delay: 90ms;
}

.settings-subpage[data-anim-enter] .settings-section-card:nth-of-type(4),
.settings-subpage[data-anim-enter] .settings-detail-card:nth-of-type(4) {
  animation-delay: 120ms;
}

.settings-subpage[data-anim-enter] .settings-section-card:nth-of-type(n + 5),
.settings-subpage[data-anim-enter] .settings-detail-card:nth-of-type(n + 5) {
  animation-delay: 150ms;
}

@keyframes tm-settings-cascade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes tm-settings-shimmer {
  from {
    opacity: 0;
    transform: translateX(-120%);
    background-position: 100% 0;
  }
  50% {
    opacity: 1;
  }
  to {
    opacity: 0;
    transform: translateX(120%);
    background-position: 0 0;
  }
}

@keyframes tm-settings-skeleton {
  from {
    background-position: 100% 0;
  }
  to {
    background-position: 0 0;
  }
}

@media (hover: hover) {
  .settings-section-row--button:hover .settings-section-row-chevron,
  .settings-list-row--action:hover .settings-list-row-chevron,
  .settings-row:hover .settings-row-chevron {
    color: var(--settings-page-hue, var(--tm-brand-purple));
    transform: translateX(var(--tm-settings-chevron-nudge));
  }

  .settings-section-row--button:hover .settings-section-row-icon,
  .settings-row:hover .settings-row-icon {
    color: var(--settings-page-hue, var(--tm-brand-purple));
  }
}

@media (prefers-reduced-motion: reduce) {
  .settings-subpage[data-anim-enter] .settings-page-header,
  .settings-subpage[data-anim-enter] .settings-section-card,
  .settings-subpage[data-anim-enter] .settings-detail-card,
  .settings-subpage[data-anim-enter] .settings-list-row--action,
  .settings-section-badge--coming-soon::after,
  .settings-empty--loading {
    animation: none;
  }
}

html[data-motion="reduced"] .settings-subpage[data-anim-enter] .settings-page-header,
html[data-motion="reduced"] .settings-subpage[data-anim-enter] .settings-section-card,
html[data-motion="reduced"] .settings-subpage[data-anim-enter] .settings-detail-card,
html[data-motion="reduced"] .settings-subpage[data-anim-enter] .settings-list-row--action,
html[data-motion="reduced"] .settings-section-badge--coming-soon::after,
html[data-motion="reduced"] .settings-empty--loading {
  animation: none;
}