:root {
  color-scheme: light;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
  line-height: 1.5;

  --builder-accent: #2563eb;
  --builder-accent-strong: #1d4ed8;
  --builder-border: #d8dee8;
  --builder-border-strong: #b7c0cd;
  --builder-code: #172033;
  --builder-danger: #b42318;
  --builder-muted: #667085;
  --builder-surface: #fff;
  --builder-surface-alt: #f7f8fa;
  --builder-surface-code: #101828;
  --builder-text: #182230;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 20rem;
  margin: 0;
  background: #eef1f5;
  color: var(--builder-text);
}

button,
input,
select {
  font: inherit;
  border-radius: 0.45rem;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
.tracker-mock:focus-visible,
.tracker-mock__marker:focus-visible {
  outline: 3px solid #075bcc;
  outline-offset: 2px;
}

code {
  font-family: SFMono-Regular, Consolas, 'Liberation Mono', monospace;
}

.builder-shell {
  width: min(100% - 2rem, 100rem);
  margin-inline: auto;
  padding-block: 1rem 2rem;
}

.builder-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.3rem 1.4rem;
  border: 1px solid var(--builder-border);
  border-radius: 0.8rem 0.8rem 0 0;
  background: var(--builder-surface);
}

.builder-header h1,
.pane-header h2,
.export-preview h3 {
  margin: 0;
  line-height: 1.15;
}

.builder-header h1 {
  margin-block: 0.2rem 0.45rem;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.builder-header__eyebrow,
.pane-header__eyebrow {
  margin: 0;
  color: var(--builder-accent);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.builder-header__description {
  max-width: 48rem;
  margin: 0;
  color: var(--builder-muted);
}

.builder-header__actions,
.preview-toolbar {
  display: flex;
  align-items: flex-end;
  gap: 0.55rem;
}

.button {
  min-height: 2.45rem;
  padding: 0.48rem 0.85rem;
  border: 1px solid var(--builder-border-strong);
  background: var(--builder-surface);
  color: var(--builder-text);
  cursor: pointer;
  font-weight: 650;
}

.button:hover {
  border-color: #98a2b3;
  background: var(--builder-surface-alt);
}

.button--primary {
  border-color: var(--builder-accent);
  background: var(--builder-accent);
  color: #fff;
}

.button--primary:hover {
  border-color: var(--builder-accent-strong);
  background: var(--builder-accent-strong);
}

.button--compact {
  min-height: 2.2rem;
  padding-block: 0.35rem;
  font-size: 0.82rem;
}

.builder-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(22rem, 31rem);
  min-height: min(76vh, 58rem);
  border: 1px solid var(--builder-border);
  border-top: 0;
  border-radius: 0 0 0.8rem 0.8rem;
  background: var(--builder-surface);
  overflow: hidden;
}

.preview-pane {
  min-width: 0;
  padding: 1.35rem;
  background: var(--builder-surface-alt);
}

.controls-pane {
  min-width: 0;
  border-left: 1px solid var(--builder-border);
  background: var(--builder-surface);
}

.pane-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.pane-header h2 {
  margin-top: 0.15rem;
  font-size: 1.25rem;
}

.controls-pane__header {
  position: sticky;
  top: 0;
  z-index: 3;
  margin: 0;
  padding: 1rem;
  border-bottom: 1px solid var(--builder-border);
  background: rgb(255 255 255 / 0.96);
  backdrop-filter: blur(8px);
}

.preview-toolbar label {
  display: grid;
  gap: 0.25rem;
  color: var(--builder-muted);
  font-size: 0.74rem;
  font-weight: 650;
}

.preview-toolbar select,
.search-field input {
  min-height: 2.2rem;
  border: 1px solid var(--builder-border-strong);
  background: #fff;
  color: var(--builder-text);
}

.preview-toolbar select {
  min-width: 7rem;
  padding-inline: 0.55rem 1.8rem;
}

.search-field input {
  width: 10rem;
  padding-inline: 0.65rem;
}

.preview-frame {
  position: relative;
  height: clamp(27rem, 58vh, 39rem);
  border: 1px solid var(--builder-border-strong);
  border-radius: 0.7rem;
  background: #dfe5ec;
  box-shadow: 0 12px 30px rgb(16 24 40 / 0.07);
  overflow: hidden;
}

.mock-document {
  position: absolute;
  inset: 1rem;
  overflow: hidden;
  border: 1px solid #d0d5dd;
  border-radius: 0.45rem;
  background: #fff;
}

.mock-document__topbar {
  display: flex;
  gap: 0.35rem;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid #e4e7ec;
  background: #f9fafb;
}

.mock-document__topbar span {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: #c8cfd9;
}

.mock-document__content {
  width: min(88%, 44rem);
  padding: clamp(1.5rem, 4vw, 3rem);
}

.mock-document__kicker {
  margin: 0 0 0.4rem;
  color: #2563eb;
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.mock-document h3 {
  margin: 0;
  color: #101828;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  letter-spacing: -0.035em;
}

.mock-document__lead {
  max-width: 38rem;
  margin-block: 0.7rem 1.5rem;
  color: #667085;
}

.mock-metric-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  margin-bottom: 1.6rem;
}

.mock-metric-row div {
  display: grid;
  gap: 0.15rem;
  padding: 0.75rem;
  border: 1px solid #e4e7ec;
  border-radius: 0.45rem;
}

.mock-metric-row strong {
  color: #101828;
  font-size: 1.05rem;
}

.mock-metric-row span {
  color: #98a2b3;
  font-size: 0.7rem;
}

.mock-section {
  margin-block: 0.75rem;
  padding: 0.85rem;
  border: 1px solid #e4e7ec;
  border-left: 0.22rem solid #84adff;
  border-radius: 0.35rem;
}

.mock-section--warning {
  border-left-color: #f79009;
  background: #fffcf5;
}

.mock-section__label {
  display: block;
  margin-bottom: 0.55rem;
  color: #475467;
  font-size: 0.74rem;
  font-weight: 700;
}

.mock-line {
  display: block;
  width: 72%;
  height: 0.45rem;
  margin-block: 0.4rem;
  border-radius: 999px;
  background: #eaecf0;
}

.mock-line--wide {
  width: 92%;
}

.mock-line--short {
  width: 48%;
}

/*
 * Synthetic renderer: geometry is deterministic, while visual declarations mirror
 * the package's public CSS variable fallbacks closely enough for theme exploration.
 */
.tracker-mock {
  border-width: 0;
  contain: var(--rxtt-track-contain, layout paint);
  cursor: pointer;
  overflow: var(--rxtt-track-overflow, hidden);
  position: absolute;
  z-index: var(--rxtt-track-z-index, 1000);
  background-color: var(--rxtt-track-bg, rgb(248 249 250 / 1));
  border-color: var(--rxtt-track-border-color, rgb(108 117 125 / 1));
  border-style: var(--rxtt-track-border-style, solid);
  transition:
    width 140ms ease,
    height 140ms ease,
    inset 140ms ease;
}

.tracker-mock[data-rxtt-orientation='vertical'] {
  top: var(--rxtt-track-start, 0);
  bottom: var(--rxtt-track-end, 0);
  width: var(--rxtt-track-thickness, 1rem);
}

.tracker-mock[data-rxtt-orientation='vertical'][data-rxtt-placement='left'] {
  left: var(--rxtt-track-offset, 0);
  border-right-width: var(--rxtt-track-border-width, 1px);
}

.tracker-mock[data-rxtt-orientation='vertical'][data-rxtt-placement='right'] {
  right: var(--rxtt-track-offset, 0);
  border-left-width: var(--rxtt-track-border-width, 1px);
}

.tracker-mock[data-rxtt-orientation='horizontal'] {
  right: var(--rxtt-track-end, 0);
  left: var(--rxtt-track-start, 0);
  height: var(--rxtt-track-thickness, 1rem);
}

.tracker-mock[data-rxtt-orientation='horizontal'][data-rxtt-placement='top'] {
  top: var(--rxtt-track-offset, 0);
  border-bottom-width: var(--rxtt-track-border-width, 1px);
}

.tracker-mock[data-rxtt-orientation='horizontal'][data-rxtt-placement='bottom'] {
  bottom: var(--rxtt-track-offset, 0);
  border-top-width: var(--rxtt-track-border-width, 1px);
}

.tracker-mock:focus-visible {
  outline: var(--rxtt-focus-outline-width, 2px) var(--rxtt-focus-outline-style, solid) var(--rxtt-focus-outline-color, Highlight);
  outline-offset: var(--rxtt-focus-outline-offset, -2px);
}

.tracker-mock__viewport,
.tracker-mock__markers {
  position: absolute;
}

.tracker-mock__viewport {
  z-index: 1;
  background-color: var(--rxtt-viewport-bg, rgb(108 117 125 / 0.3));
}

.tracker-mock__markers {
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.tracker-mock[data-rxtt-orientation='vertical'] .tracker-mock__viewport {
  inset-inline: 0;
  top: 25%;
  height: 31%;
}

.tracker-mock[data-rxtt-orientation='horizontal'] .tracker-mock__viewport {
  inset-block: 0;
  left: 25%;
  width: 31%;
}

.tracker-mock__marker {
  display: block;
  margin: 0;
  padding: 0;
  position: absolute;
  pointer-events: auto;
  background-color: var(--rxtt-marker-bg, rgb(220 53 69 / 1));
  border-color: var(--rxtt-marker-border-color, rgb(108 117 125 / 1));
  border-style: var(--rxtt-marker-border-style, solid);
  border-width: var(--rxtt-marker-border-width, 0);
  border-radius: var(--rxtt-marker-border-radius, 0);
  opacity: var(--rxtt-marker-opacity, 1);
}

.tracker-mock__marker:hover {
  box-shadow: inset 0 0 0 var(--rxtt-marker-hover-ring-width, var(--rxtt-marker-ring-width, 1px)) var(--rxtt-marker-hover-ring-color, var(--rxtt-marker-ring-color, rgb(108 117 125 / 1)));
}

.tracker-mock[data-rxtt-orientation='vertical'] .tracker-mock__marker {
  inset-inline: 0;
  top: var(--mock-start);
  width: 100%;
  height: max(var(--mock-size), var(--rxtt-marker-min-size, 2px));
}

.tracker-mock[data-rxtt-orientation='horizontal'] .tracker-mock__marker {
  inset-block: 0;
  left: var(--mock-start);
  width: max(var(--mock-size), var(--rxtt-marker-min-size, 2px));
  height: 100%;
}

.tracker-mock:focus-visible .tracker-mock__marker[data-rxtt-selected='true'] {
  box-shadow: inset 0 0 0 var(--rxtt-marker-selected-ring-width, var(--rxtt-marker-ring-width, 1px)) var(--rxtt-marker-selected-ring-color, var(--rxtt-marker-ring-color, rgb(108 117 125 / 1)));
}

.tracker-mock__marker[data-rxtt-kind='cluster'] {
  align-items: center;
  display: flex;
  justify-content: center;
  line-height: 1;
  background-color: var(--rxtt-cluster-bg, var(--rxtt-marker-bg, rgb(220 53 69 / 1)));
  font-size: var(--rxtt-cluster-font-size, 10px);
}

.tracker-mock__marker[data-rxtt-kind='cluster']::after {
  color: var(--rxtt-cluster-text-color, #fff);
  content: var(--rxtt-cluster-content, attr(data-rxtt-count));
}

.preview-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
  margin-block: 0.75rem 1rem;
  color: var(--builder-muted);
  font-size: 0.78rem;
}

.preview-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.preview-legend__swatch {
  width: 0.7rem;
  height: 0.7rem;
  border: 1px solid rgb(16 24 40 / 0.15);
  border-radius: 0.16rem;
}

.preview-legend__swatch--viewport {
  background: rgb(108 117 125 / 0.3);
}

.preview-legend__swatch--marker {
  background: rgb(220 53 69 / 1);
}

.preview-legend__swatch--cluster {
  background: rgb(220 53 69 / 1);
  box-shadow: inset 0 0 0 2px #fff;
}

.export-preview {
  overflow: hidden;
  border: 1px solid #344054;
  border-radius: 0.55rem;
  background: var(--builder-surface-code);
  color: #d0d5dd;
}

.export-preview header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid #344054;
}

.export-preview h3 {
  margin-top: 0.15rem;
  color: #f2f4f7;
  font-size: 0.92rem;
}

.export-preview .pane-header__eyebrow {
  color: #84adff;
}

.modified-count {
  padding: 0.18rem 0.45rem;
  border: 1px solid #475467;
  border-radius: 999px;
  color: #d0d5dd;
  font-size: 0.7rem;
}

.export-preview pre {
  min-height: 8.2rem;
  max-height: 15rem;
  margin: 0;
  padding: 0.9rem;
  overflow: auto;
  font-size: 0.78rem;
  line-height: 1.65;
  tab-size: 2;
}

.controls {
  max-height: calc(76vh - 4.8rem);
  min-height: 42rem;
  overflow: auto;
  scrollbar-gutter: stable;
}

.control-group {
  border-bottom: 1px solid var(--builder-border);
}

.control-group > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  cursor: pointer;
  list-style: none;
}

.control-group > summary::-webkit-details-marker {
  display: none;
}

.control-group > summary::before {
  width: 0.45rem;
  height: 0.45rem;
  flex: 0 0 auto;
  border-right: 2px solid #667085;
  border-bottom: 2px solid #667085;
  content: '';
  transform: rotate(-45deg);
  transition: transform 120ms ease;
}

.control-group[open] > summary::before {
  transform: rotate(45deg) translate(-1px, -1px);
}

.control-group > summary > span:first-of-type {
  display: grid;
  flex: 1;
  gap: 0.08rem;
}

.control-group > summary strong {
  font-size: 0.9rem;
}

.control-group > summary small {
  color: var(--builder-muted);
  font-size: 0.72rem;
  font-weight: 400;
}

.control-group__count {
  min-width: 1.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
  background: #f2f4f7;
  color: #475467;
  font-size: 0.68rem;
  text-align: center;
}

.control-group__body {
  padding: 0 1rem 0.4rem 2rem;
}

.variable-field {
  position: relative;
  padding-block: 0.85rem;
  border-top: 1px solid #eaecf0;
}

.variable-field[hidden],
.control-group[hidden] {
  display: none;
}

.variable-field[data-modified='true']::before {
  position: absolute;
  top: 1.05rem;
  left: -1.05rem;
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 50%;
  background: var(--builder-accent);
  content: '';
}

.variable-field__header,
.variable-field__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
}

.variable-field__name {
  color: var(--builder-code);
  font-size: 0.76rem;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.reset-button {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--builder-muted);
  cursor: pointer;
  font-size: 0.7rem;
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.reset-button:hover {
  color: var(--builder-accent);
}

.variable-field__description {
  margin-block: 0.25rem 0.55rem;
  color: var(--builder-muted);
  font-size: 0.73rem;
}

.variable-field__editor {
  display: flex;
  align-items: stretch;
  gap: 0.45rem;
}

.variable-field__editor input,
.variable-field__editor select {
  min-height: 2.25rem;
  border: 1px solid var(--builder-border-strong);
  background: #fff;
  color: var(--builder-text);
}

.value-input {
  width: 100%;
  min-width: 0;
  padding-inline: 0.6rem;
  font-family: SFMono-Regular, Consolas, 'Liberation Mono', monospace;
  font-size: 0.76rem;
}

.variable-field[data-invalid='true'] .value-input {
  border-color: #f04438;
  box-shadow: 0 0 0 1px #f04438;
}

.variable-field__editor input[type='color'] {
  width: 2.6rem;
  flex: 0 0 2.6rem;
  padding: 0.18rem;
  cursor: pointer;
}

.variable-field__editor input[type='color']:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}

.variable-field__editor input[type='range'] {
  width: 6.5rem;
  flex: 0 0 6.5rem;
  border: 0;
}

.variable-field__editor select {
  width: 7.2rem;
  flex: 0 0 7.2rem;
  padding-inline: 0.45rem;
  font-size: 0.73rem;
}

.variable-field__footer {
  min-height: 1rem;
  margin-top: 0.35rem;
  color: #98a2b3;
  font-size: 0.65rem;
}

.variable-field__footer code {
  color: #667085;
}

.variable-field__validation {
  color: var(--builder-danger);
  text-align: right;
}

.toast {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 9999;
  max-width: min(24rem, calc(100vw - 2.5rem));
  padding: 0.65rem 0.85rem;
  border: 1px solid #344054;
  border-radius: 0.5rem;
  background: #101828;
  color: #fff;
  font-size: 0.82rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.4rem);
  transition:
    opacity 140ms ease,
    transform 140ms ease;
}

.toast[data-visible='true'] {
  opacity: 1;
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

@media (width <= 72rem) {
  .builder-workspace {
    grid-template-columns: minmax(0, 1fr) minmax(20rem, 25rem);
  }

  .builder-header,
  .pane-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .builder-header__actions {
    flex-wrap: wrap;
  }
}

@media (width <= 52rem) {
  .builder-shell {
    width: min(100% - 1rem, 42rem);
    padding-block: 0.5rem 1rem;
  }

  .builder-header {
    border-radius: 0.65rem 0.65rem 0 0;
  }

  .builder-workspace {
    grid-template-columns: 1fr;
    border-radius: 0 0 0.65rem 0.65rem;
  }

  .controls-pane {
    border-top: 1px solid var(--builder-border);
    border-left: 0;
  }

  .controls {
    max-height: none;
    min-height: auto;
    overflow: visible;
  }

  .controls-pane__header {
    position: static;
  }

  .preview-toolbar {
    width: 100%;
    flex-wrap: wrap;
  }

  .mock-document__content {
    width: 92%;
    padding: 1.35rem;
  }

  .mock-metric-row {
    grid-template-columns: 1fr;
  }
}

@media (width <= 34rem) {
  .builder-header__actions,
  .builder-header__actions .button,
  .preview-toolbar,
  .preview-toolbar label,
  .preview-toolbar select,
  .preview-toolbar .button {
    width: 100%;
  }

  .preview-pane {
    padding: 0.85rem;
  }

  .preview-frame {
    height: 26rem;
  }

  .search-field,
  .search-field input {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}