:root {
  color-scheme: light dark;
  --background: #f2f2f2;
  --surface: #fff;
  --text: #161616;
  --muted: #686868;
  --line: #c9c9c9;
  --soft-line: #e2e2e2;
  --subtle: #f7f7f7;
  --accent: #c44f1b;
  --accent-soft: #ececec;
  --activation-highlight: #c44f1b;
  --on-accent: #fff;
  --control-height: 38px;
  --range-thumb-width: 16px;
  --range-thumb-height: 16px;
  --mono: "SFMono-Regular", Consolas, monospace;
  color: var(--text);
  background: var(--background);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --background: #171717;
    --surface: #222;
    --text: #ededed;
    --muted: #aaa;
    --line: #555;
    --soft-line: #3a3a3a;
    --subtle: #292929;
    --accent: #c95c2d;
    --accent-soft: #3a302c;
  }
}
* { box-sizing: border-box; }
body {
  min-width: 320px;
  margin: 0;
}
button,
input,
textarea { font: inherit; }
main {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 52px 0 80px;
}
/* Entry mode */
.mode-picker {
  width: min(1240px, calc(100% - 40px));
  min-height: 100vh;
  padding-top: clamp(48px, 9vh, 108px);
}
.mode-picker-header {
  margin-bottom: 46px;
  h1 {
    margin: 0;
    font-size: clamp(30px, 4vw, 48px);
    font-weight: 600;
    letter-spacing: -0.045em;
    line-height: 1;
    white-space: nowrap;
  }
}
.mode-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.mode-card {
  display: grid;
  grid-template-rows: auto auto 1fr;
  min-width: 0;
  padding: 0;
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
  text-align: center;
  transition: background 160ms ease, color 160ms ease;
  &:hover, &:focus-visible {
    outline: 0;
    background: var(--text);
    color: var(--background);
    .mode-illustration { color: var(--background); }
    .mode-card-copy { color: color-mix(in srgb, var(--background), transparent 35%); }
  }
}
.mode-illustration {
  grid-column: 1 / -1;
  display: block;
  height: 210px;
  color: var(--text);
  svg { width: 100%; height: 100%; }
  path, circle, rect { vector-effect: non-scaling-stroke; }
}
.signal-line, .force-arrow, .lens-handle, .bridge, .panel-signal {
  fill: none; stroke: currentcolor; stroke-width: 1.5;
}
.node, .feature-field circle { fill: currentcolor; }
.node-a { fill: var(--accent); }
.panel-signal { stroke: var(--accent); }
.feature-field { opacity: .3; }
.feature-field circle:nth-child(11) { fill: var(--accent); opacity: 1; }
.lens { fill: none; stroke: currentcolor; stroke-width: 2; }
.panel-shape { fill: none; stroke: currentcolor; opacity: .38; }
.panel-lines { fill: none; stroke: currentcolor; stroke-width: 1; opacity: .6; }
.bridge { stroke: var(--accent); }
.mode-card-title { padding: 7px 22px 0; font-size: 23px; font-weight: 590; letter-spacing: -.035em; }
.mode-card-copy { min-height: 68px; padding: 9px 22px 22px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.change-mode-button {
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 9px;
  letter-spacing: .06em;
  text-transform: uppercase;
  &:hover { border-color: var(--text); color: var(--text); }
}
.visualizer[data-mode="intervene"] .browser,
.visualizer[data-mode="explore"] .playground { display: none; }
/* Page header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 32px;
  h1 {
    margin: 0;
    font-size: clamp(38px, 6vw, 58px);
    font-weight: 650;
    letter-spacing: -0.055em;
    line-height: 0.95;
  }
}
@media (max-width: 760px) {
  .mode-picker-header h1 {
    text-align: center;
    white-space: normal;
  }
  .mode-cards { grid-template-columns: 1fr; }
  .mode-illustration { height: 180px; }
  .page-header {
    flex-wrap: nowrap;
    gap: 12px;
  }
  .change-mode-button {
    flex: 0 0 auto;
    min-height: 28px;
    padding: 0 8px;
    font-size: 8px;
  }
  .page-title {
    min-width: 0;
    gap: 8px;
  }
  .page-title h1 { font-size: clamp(26px, 8vw, 38px); }
  .page-header .github-link {
    flex-basis: 22px;
    height: 22px;
  }
  .page-header .dataset-meta { display: none; }
}
.page-title {
  display: flex;
  align-items: baseline;
  gap: 16px;
}
.github-link {
  flex: 0 0 24px;
  height: 24px;
  color: var(--text);
  background: currentcolor;
  mask: url("icons/github.svg") center / contain no-repeat;
  -webkit-mask: url("icons/github.svg") center / contain no-repeat;
  &:hover { color: var(--accent); }
}
.dataset-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px 28px;
  margin: 0;
  dt {
    margin-bottom: 3px;
    color: var(--muted);
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }
  dd {
    margin: 0;
    font-family: var(--mono);
    font-size: 11px;
  }
}

/* Shared panels and controls */
.playground,
.browser {
  border: 1px solid var(--line);
  background: var(--surface);
}
.playground-header h2,
.popover-dialog h3,
.generation-results h3 {
  margin: 0;
  font-size: 13px;
}
.popover-button {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  &:hover {
    border-color: var(--text);
    color: var(--text);
  }
}
.icon-button:hover { color: var(--text); }
.settings-icon,
.filter-icon,
.icon-button::after,
.range-result-count::after {
  background: currentcolor;
  mask: var(--icon) center / contain no-repeat;
  -webkit-mask: var(--icon) center / contain no-repeat;
}
.popover-dialog {
  position: fixed;
  inset: anchor(bottom) anchor(right) auto auto;
  margin: 8px 0 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 18px 60px rgb(0 0 0 / 28%);
  > header {
    border-bottom: 1px solid var(--line);
    background: var(--subtle);
  }
}
.intervention-form label,
.form-field,
.amount-field,
.sampling-setting > label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.intervention-form textarea,
.intervention-form input:not([type="range"]),
.sampling-setting-control input[type="number"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--text);
  background-color: var(--subtle);
  font-size: 12px;
}
.intervention-form input:not([type="range"]),
.sampling-setting-control input[type="number"] {
  height: var(--control-height);
  padding: 0 10px;
}
.intervention-form .custom-select-trigger {
  height: var(--control-height);
  padding: 0 10px;
  font-size: 12px;
}

/* Custom dropdowns */
.custom-select {
  position: relative;
  min-width: 0;
}
.custom-select.is-open { z-index: 40; }
.custom-select-trigger {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 8px;
  align-items: center;
  gap: 10px;
  width: 100%;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--text);
  background: var(--subtle);
  cursor: pointer;
  text-align: left;
  &:hover,
  &[aria-expanded="true"] { border-color: var(--text); }
  &[aria-invalid="true"] { border-color: var(--accent); }
}
.custom-select-value {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
  min-width: 0;
  white-space: nowrap;
}
.feature-option-text {
  overflow: hidden;
  min-width: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.feature-star {
  --icon: url("icons/star.svg");
  display: inline-block;
  flex: 0 0 auto;
  width: 13px;
  height: 13px;
  color: var(--accent);
  background: currentcolor;
  mask: var(--icon) center / contain no-repeat;
  -webkit-mask: var(--icon) center / contain no-repeat;
}
.dropdown-chevron {
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-right: 1px solid currentcolor;
  border-bottom: 1px solid currentcolor;
  color: var(--muted);
  transform: rotate(45deg);
  transition: transform 120ms ease, margin 120ms ease;
}
.custom-select.is-open .dropdown-chevron {
  margin-top: 3px;
  transform: rotate(225deg);
}
.dropdown-menu {
  position: absolute;
  z-index: 50;
  top: calc(100% + 5px);
  left: 0;
  overflow-y: auto;
  max-height: min(260px, 50vh);
  padding: 0;
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--surface);
  font-size: 11px;
  letter-spacing: 0;
  text-transform: none;
  scrollbar-color: var(--line) transparent;
  scrollbar-width: thin;
}
.select-menu {
  width: max-content;
  min-width: 100%;
  max-width: min(360px, calc(100vw - 32px));
}
.custom-select-option {
  padding: 8px 10px;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  &.is-active { background: var(--subtle); }
  &[aria-selected="true"] {
    color: var(--accent);
    background: var(--accent-soft);
    box-shadow: inset 2px 0 var(--accent);
  }
}

/* Range controls */
input.progress-range {
  min-width: 0;
  height: 28px;
  appearance: none;
  background: transparent;
  cursor: pointer;
  &::-webkit-slider-runnable-track {
    height: 3px;
    background: linear-gradient(
      to right,
      var(--accent) 0 var(--range-progress),
      var(--line) var(--range-progress) 100%
    );
  }
  &::-moz-range-track {
    height: 3px;
    background: linear-gradient(
      to right,
      var(--accent) 0 var(--range-progress),
      var(--line) var(--range-progress) 100%
    );
  }
}
input.progress-range::-webkit-slider-thumb,
.dual-range input[type="range"]::-webkit-slider-thumb {
  box-sizing: border-box;
  width: var(--range-thumb-width);
  height: var(--range-thumb-height);
  margin-top: calc((3px - var(--range-thumb-height)) / 2);
  border: 2px solid var(--accent);
  border-radius: 1px;
  appearance: none;
  background: #fff;
  cursor: pointer;
  pointer-events: auto;
}
input.progress-range::-moz-range-thumb,
.dual-range input[type="range"]::-moz-range-thumb {
  box-sizing: border-box;
  width: var(--range-thumb-width);
  height: var(--range-thumb-height);
  border: 2px solid var(--accent);
  border-radius: 1px;
  background: #fff;
  cursor: pointer;
  pointer-events: auto;
}
.dual-range {
  --range-start: 0%;
  --range-end: 100%;
  position: relative;
  &::before {
    content: "";
    position: absolute;
    inset: 12px 0 auto;
    height: 3px;
    background: linear-gradient(
      to right,
      var(--line) 0 var(--range-start),
      var(--accent) var(--range-start) var(--range-end),
      var(--line) var(--range-end) 100%
    );
  }
  input[type="range"] {
    position: absolute;
    z-index: 2;
    inset: 0 auto auto 0;
    width: 100%;
    height: 28px;
    margin: 0;
    appearance: none;
    background: transparent;
    pointer-events: none;
    &::-webkit-slider-runnable-track {
      height: 3px;
      background: transparent;
    }
    &::-moz-range-track {
      height: 3px;
      background: transparent;
    }
  }
}

/* Intervention playground */
.playground { margin-bottom: 24px; }
.playground-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--subtle);
  p {
    margin: 5px 0 0;
    color: var(--muted);
    font-size: 11px;
  }
}
.playground-header-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
  anchor-name: --playground-header-actions;
  .popover-button {
    align-items: center;
    justify-content: center;
    height: 32px;
  }
}
.help-button {
  width: 32px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
}
.settings-button {
  padding: 0 10px;
  gap: 8px;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.playground:has(.playground-help-dialog:popover-open) .help-button,
.playground:has(.sampling-settings-dialog:popover-open) .settings-button,
.toolbar:has(#clear-filters-button:not(:disabled)) .filter-button,
.toolbar:has(.filter-popover:popover-open) .filter-button {
  border-color: var(--accent);
  color: var(--on-accent);
  background: var(--accent);
}
.settings-icon {
  --icon: url("icons/settings.svg");
  display: block;
  width: 14px;
  height: 14px;
}
.playground-help-dialog {
  ol {
    display: grid;
    gap: 7px;
    margin: 0;
    padding: 14px 16px 16px 40px;
    color: var(--muted);
    font-size: 11px;
    line-height: 1.55;
  }
  li::marker {
    color: var(--accent);
    font-family: var(--mono);
    font-size: 9px;
    font-weight: 600;
  }
  ul {
    margin: 4px 0 0;
    padding-left: 18px;
  }
  strong {
    color: var(--text);
    font-weight: 600;
  }
}
.playground-help-dialog,
.sampling-settings-dialog {
  position-anchor: --playground-header-actions;
  width: min(380px, calc(100% - 32px));
  > header { padding: 14px 16px; }
}
.sampling-settings-grid {
  display: grid;
  gap: 14px;
  padding: 16px;
}
.sampling-setting {
  display: grid;
  gap: 6px;
}
.sampling-setting-control {
  display: flex;
  align-items: center;
  gap: 12px;
  .progress-range { flex: 1; }
  input[type="number"] { width: 68px; }
}
.intervention-form {
  padding: 16px 18px 18px;
  textarea {
    padding: 10px 11px;
    resize: vertical;
    line-height: 1.5;
  }
}
.intervention-info {
  margin-bottom: 16px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  > summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 11px 13px;
    cursor: pointer;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.06em;
    list-style: none;
    text-transform: uppercase;
    &::-webkit-details-marker { display: none; }
  }
}
.intervention-example-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  padding: 0 13px 13px;
}
.intervention-example {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
}
.intervention-example-value {
  overflow: hidden;
  min-width: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.example-feature { color: var(--text); }
.example-prompt { margin-top: 6px; }
.intervention-example-button {
  min-height: 26px;
  margin-top: 12px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--text);
  background: transparent;
  cursor: pointer;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  &:hover { border-color: var(--text); }
}
.intervention-controls {
  display: grid;
  grid-template-columns: minmax(220px, 420px) max-content;
  align-items: start;
  gap: 12px;
  margin-top: 12px;
}
.searchable-select-menu {
  overflow: hidden;
  width: min(420px, calc(100vw - 40px));
  max-height: none;
}
.select-search-wrap {
  border-bottom: 1px solid var(--line);
  background: var(--subtle);
}
.intervention-form input.select-search {
  height: var(--control-height);
  border: 0;
  background: transparent;
  font-size: 11px;
  letter-spacing: 0;
  text-transform: none;
  appearance: none;
  &::placeholder { color: var(--muted); }
  &::-webkit-search-cancel-button { appearance: none; }
  &:focus-visible {
    outline: 0;
    box-shadow: inset 2px 0 var(--accent);
  }
}
.searchable-select-options {
  overflow-y: auto;
  max-height: min(260px, 50vh);
  scrollbar-color: var(--line) transparent;
  scrollbar-width: thin;
}
.select-empty {
  margin: 0;
  padding: 12px 10px;
  color: var(--muted);
}
.searchable-select-menu .custom-select-option {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
}
.amount-control {
  display: grid;
  grid-template-columns: minmax(0, 160px) 82px;
  align-items: start;
  gap: 12px;
}
.amount-preset-control {
  min-width: 0;
  .progress-range {
    display: block;
    width: 100%;
    margin: 0;
    padding: 0;
    border: 0;
  }
}
.amount-step-labels {
  display: flex;
  justify-content: space-between;
  height: 8px;
  margin: 0 6px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
  line-height: 1;
  span {
    display: flex;
    flex: 0 0 0;
    min-width: 0;
    justify-content: center;
    white-space: nowrap;
  }
}
.playground-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 15px;
}
.primary-button {
  min-height: var(--control-height);
  padding: 0 14px;
  border: 1px solid var(--accent);
  color: var(--on-accent);
  background: var(--accent);
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  &:disabled {
    cursor: wait;
    opacity: 0.55;
  }
}
.playground-error {
  color: var(--accent);
  font-size: 10px;
}
.generation-results {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  &:not([hidden]) { display: grid; }
  article + article { border-left: 1px solid var(--line); }
  article > header {
    padding: 8px 12px;
    border-bottom: 1px solid var(--soft-line);
    background: var(--subtle);
  }
}
.generation-output {
  min-height: 120px;
  margin: 0;
  padding: 14px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.65;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  &.is-loading {
    display: flex;
    align-items: center;
    flex-direction: column;
    justify-content: center;
    gap: 10px;
  }
}
.generation-wait-note {
  color: var(--muted);
  font-size: 10px;
  text-align: center;
}
.generation-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--soft-line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(1turn); }
}
.generation-prompt {
  color: var(--muted);
  background: var(--accent-soft);
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

/* Feature browser */
.browser {
  --feature-activation-column: 110px;
  --feature-id-column: 64px;
  --feature-toggle-column: 52px;
  overflow: hidden;
}
.toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 12px;
  border-bottom: 1px solid var(--line);
  input[type="search"] {
    height: var(--control-height);
    padding: 0 12px;
    border: 1px solid var(--line);
    color: var(--text);
    background-color: var(--subtle);
    font-size: 13px;
  }
  > input[type="search"] {
    flex: 1 1 320px;
    width: auto;
    min-width: 200px;
  }
  .sort-control {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--muted);
    font-size: 11px;
  }
  .custom-select-trigger {
    height: 40px;
    padding: 0 10px;
    font-size: 13px;
  }
}
.filter-button {
  anchor-name: --filter-button;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-left: auto;
  padding: 0;
  background: var(--subtle);
}
.filter-icon {
  --icon: url("icons/filter.svg");
  width: 16px;
  height: 16px;
}
.filter-popover {
  position-anchor: --filter-button;
  width: 260px;
  > header { padding: 12px 14px; }
  h3 { font-size: 12px; }
}
.filter-options {
  display: grid;
  gap: 14px;
  padding: 14px;
}
.category-filter {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
  .custom-select { width: 100%; }
  .custom-select-trigger {
    width: 100%;
    background: var(--surface);
  }
}
.clear-filters-button {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  color: var(--text);
  background: transparent;
  cursor: pointer;
  font-size: 9px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  &:disabled {
    color: var(--muted);
    cursor: default;
  }
}
.sort-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sort-control .custom-select { width: 154px; }
.icon-button {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  padding: 0;
  border: 0;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}
.icon-button::after,
.range-result-count::after {
  content: "";
  width: 16px;
  height: 16px;
}
.sort-direction-button::after,
.range-result-count::after {
  --icon: url("icons/switch.svg");
}
.activation-count-heading,
.activation-count-bounds {
  display: flex;
  justify-content: space-between;
}
.activation-count-heading {
  align-items: baseline;
  color: var(--muted);
  font-size: 11px;
  output { color: var(--text); }
}
.activation-count-heading output,
.activation-count-bounds {
  font-family: var(--mono);
  font-size: 9px;
  font-variant-numeric: tabular-nums;
}
.activation-count-range {
  height: 28px;
  margin-top: 8px;
}
.activation-count-bounds { color: var(--muted); }
.list-heading {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 38px;
  padding: 0 var(--feature-toggle-column) 0 16px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  background: var(--subtle);
  font-size: 9px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.list-summary,
.feature-quality-legend {
  display: flex;
  align-items: center;
}
.list-summary {
  gap: 12px;
  min-width: 0;
}
.feature-quality-legend {
  gap: 5px;
  flex: 0 0 auto;
  padding: 4px 7px 4px 6px;
  border: 1px solid var(--soft-line);
  border-radius: 999px;
  color: var(--muted);
  background: var(--surface);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.045em;
  line-height: 1;
}
.feature-quality-legend .feature-star {
  width: 11px;
  height: 11px;
}
.column-labels {
  display: grid;
  grid-template-columns: var(--feature-activation-column);
  text-align: right;
}

/* Feature list and detail */
.feature {
  border-bottom: 1px solid var(--soft-line);
  &:last-child { border-bottom: 0; }
  > summary {
    display: grid;
    grid-template-columns:
      var(--feature-id-column)
      minmax(180px, 1fr)
      var(--feature-activation-column)
      var(--feature-toggle-column);
    align-items: center;
    min-height: 58px;
    padding-left: 16px;
    cursor: pointer;
    list-style: none;
    &::-webkit-details-marker { display: none; }
    &:hover { background: var(--subtle); }
  }
  &[open] > summary {
    background: var(--accent-soft);
    box-shadow: inset 3px 0 var(--accent);
  }
}
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 58px;
  padding: 10px 16px;
  border-top: 1px solid var(--line);
  background: var(--subtle);
  &[hidden] { display: none; }
  .pagination-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 10px;
    font-variant-numeric: tabular-nums;
  }
  .custom-select {
    width: 68px;
    font-family: var(--mono);
  }
  .custom-select-trigger {
    height: 34px;
    padding: 0 10px;
    background: var(--surface);
    font-size: 11px;
  }
  .select-menu {
    top: auto;
    bottom: calc(100% + 5px);
    width: 100%;
    min-width: 68px;
    font-size: 10px;
  }
}
.previous-page-button::after { --icon: url("icons/arrow_left.svg"); }
.next-page-button::after { --icon: url("icons/arrow_right.svg"); }
.page-button:disabled {
  cursor: default;
  opacity: 0.25;
}
.feature-id,
.feature-stat,
.context-stats,
.token-percentile {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}
.feature-id,
.feature-stat {
  color: var(--muted);
  font-size: 11px;
}
.feature-title {
  display: flex;
  align-items: center;
  gap: 7px;
  overflow: hidden;
  padding-right: 20px;
  font-size: 13px;
  font-weight: 600;
}
.feature-title-text {
  overflow: hidden;
  min-width: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.feature-category {
  flex: 0 0 auto;
  padding: 3px 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1;
  text-transform: uppercase;
}
.feature-stat { text-align: right; }
.chevron {
  width: 8px;
  height: 8px;
  align-self: center;
  justify-self: center;
  border-right: 2px solid;
  border-bottom: 2px solid;
  color: var(--muted);
  transform: rotate(-45deg);
}
.feature[open] .chevron,
.intervention-info[open] .chevron {
  color: var(--accent);
  transform: rotate(45deg);
}
.feature-body {
  padding: 22px 24px 26px calc(16px + var(--feature-id-column));
  border-top: 1px solid var(--line);
  background: var(--subtle);
  &.is-loading {
    display: grid;
    place-items: center;
  }
}
.feature-overview {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 32px;
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}
.feature-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(104px, 1fr));
  gap: 8px;
  justify-self: end;
  margin: 0;
  padding: 0;
}
.feature-fact {
  display: flex;
  flex-direction: column;
  padding: 9px 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  dt {
    color: var(--muted);
    font-size: 8px;
    letter-spacing: 0.06em;
    line-height: 1.25;
    text-transform: uppercase;
  }
  dd {
    order: -1;
    margin: 0 0 5px;
    font-family: var(--mono);
    font-size: 17px;
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    line-height: 1;
  }
}
.token-summary h3,
.range-heading h3 {
  margin: 0;
  font-size: 12px;
}
.token-summary h3 { margin-bottom: 9px; }
.range-heading {
  display: flex;
  align-items: center;
  gap: 8px;
}
.range-hint {
  padding: 2px 5px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 8px;
  letter-spacing: 0.05em;
}
.token-group {
  display: grid;
  grid-template-columns: 44px 1fr;
  align-items: start;
  gap: 8px;
  + .token-group { margin-top: 6px; }
}
.token-strength {
  padding-top: 3px;
  color: var(--muted);
  font-size: 9px;
}
.token-list {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.token-name {
  overflow: hidden;
  max-width: 180px;
  padding: 3px 6px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-family: var(--mono);
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: pre;
}
.range-value,
.range-result-count {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  font-variant-numeric: tabular-nums;
}
.distribution-plot {
  display: grid;
  grid-template-columns: repeat(var(--distribution-bin-count), minmax(2px, 1fr));
  height: 92px;
  align-items: end;
  gap: 2px;
  margin-top: 12px;
  border-bottom: 1px solid var(--line);
}
.distribution-bar {
  min-height: 2px;
  background: var(--accent);
  opacity: 0.2;
  &.selected { opacity: 1; }
}
.range-selector { height: 48px; }
.range-value-track {
  position: absolute;
  right: 7px;
  left: 7px;
}
.range-value {
  position: absolute;
  top: 31px;
  transform: translateX(-50%);
  white-space: nowrap;
  pointer-events: none;
}
.range-result-count {
  display: flex;
  align-items: center;
  gap: 5px;
  width: 100%;
  margin: 10px 0 9px;
  padding: 14px 0 0;
  border: 0;
  border-top: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  &::after {
    width: 13px;
    height: 13px;
  }
}
.contexts {
  display: grid;
  gap: 9px;
}
.context-card {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
}
.context-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 34px;
  padding: 7px 11px;
  border-bottom: 1px solid var(--soft-line);
  color: var(--muted);
  background: var(--subtle);
  font-size: 9px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.context-stats { text-align: right; }
.tokens {
  margin: 0;
  padding: 14px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.8;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}
.token.active {
  background-color: color-mix(
    in srgb,
    var(--activation-highlight) var(--activation-opacity),
    transparent
  );
  box-shadow: inset 0 -1px rgb(140 49 10 / 28%);
}
.loading,
.empty-state {
  margin: 0;
  padding: 24px 0;
  color: var(--muted);
  font-size: 12px;
}
.error-message {
  margin: 14px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  background: var(--subtle);
  font-size: 12px;
}

/* Interaction and responsive layout */
:where(button, input, textarea, summary, a):focus-visible {
  outline: 2px solid var(--text);
  outline-offset: -2px;
}
:where(.progress-range, .dual-range input):focus-visible {
  outline-offset: 2px;
}
@media (max-width: 720px) {
  main {
    width: calc(100% - 20px);
    padding-top: 32px;
  }
  .page-header {
    display: flex;
  }
  .page-title { justify-content: flex-start; }
  .github-link { transform: translateY(2px); }
  .generation-results {
    &:not([hidden]) { grid-template-columns: 1fr; }
    article + article {
      border-top: 1px solid var(--line);
      border-left: 0;
    }
  }
  .toolbar {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px 16px;
    > input[type="search"] {
      grid-column: 1 / -1;
      width: 100%;
    }
  }
  .filter-button {
    justify-self: start;
    margin-left: 0;
  }
  .filter-popover {
    inset: anchor(bottom) auto auto anchor(left);
  }
  .sort-group {
    grid-column: 2;
    justify-self: end;
  }
  .list-heading { padding-right: 16px; }
  .column-labels,
  .feature-id,
  .feature-category,
  .feature-stat { display: none; }
  .feature > summary {
    grid-template-columns:
      minmax(0, 1fr)
      var(--feature-toggle-column);
  }
  .feature-body {
    padding: 18px 12px 22px;
  }
  .feature-overview {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .feature-facts {
    width: 100%;
    justify-self: stretch;
  }
  .context-header { align-items: flex-start; }
  .intervention-example-list {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .intervention-example {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    border: 0;
    border-top: 1px solid var(--line);
    background: transparent;
  }
  .intervention-example:last-child { border-bottom: 1px solid var(--line); }
  .example-prompt { display: none; }
  .intervention-example-button { margin-top: 0; }
}
@media (max-width: 560px) {
  .intervention-controls { grid-template-columns: 1fr; }
  .amount-control { grid-template-columns: minmax(0, 1fr) 82px; }
}
@media (max-width: 380px) {
  .playground-actions {
    align-items: flex-start;
    flex-direction: column;
  }
  .toolbar { grid-template-columns: 1fr; }
  .toolbar > input[type="search"],
  .filter-button,
  .sort-group { grid-column: 1; }
  .sort-group { width: 100%; }
  .sort-control {
    flex: 1;
    justify-content: space-between;
  }
}