@font-face {
  font-family: "Source Sans 3";
  src: url("../../assets/fonts/source-sans-3-400.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Source Sans 3";
  src: url("../../assets/fonts/source-sans-3-600.woff2") format("woff2");
  font-style: normal;
  font-weight: 600 700;
  font-display: swap;
}

:root {
  --ink: #24333d;
  --muted: #5e6d77;
  --kept: #197989;
  --cut: #87476a;
  --line: #d2dbe0;
  --paper: #f4f6f7;
  --stage: #f8fbfc;
  --page-gutter: 36px;
}

[hidden] { display: none !important; }

body {
  background: var(--paper);
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 1520px;
  margin: 0 auto;
  padding: 0 var(--page-gutter) 48px;
}

a { color: #186b7a; }
button, select { font: inherit; }

button:focus-visible,
select:focus-visible,
input:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 3px solid #b78429;
  outline-offset: 3px;
}

/* The view switcher belongs to the application, above the experiment. */
.appbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  min-height: 74px;
  width: calc(100% + 2 * var(--page-gutter));
  margin-left: calc(-1 * var(--page-gutter));
  padding: 0 var(--page-gutter);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.app-brand {
  width: fit-content;
  color: var(--ink);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -.025em;
  text-decoration: none;
}

.app-brand span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0;
}

.back-link {
  justify-self: end;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.back-link:hover { color: var(--ink); text-decoration: underline; }

.explorer-tabs {
  display: flex;
  align-self: stretch;
  gap: 8px;
  padding: 0;
  border: 0;
  background: transparent;
}

.explorer-tabs button {
  position: relative;
  min-height: 44px;
  padding: 0 20px;
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font-size: 15px;
  white-space: nowrap;
}

.explorer-tabs button:hover { background: #f4f8f9; color: var(--ink); }
.explorer-tabs button[aria-selected="true"] {
  border-bottom-color: var(--kept);
  color: var(--ink);
  font-weight: 600;
}
.explorer-tabs button:focus-visible { outline-offset: -6px; }

.project-intro {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  max-width: none;
  margin: 23px 0 19px;
}

.project-intro h1 {
  margin: 0;
  font-size: clamp(22px, 2vw, 27px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -.025em;
}

.project-intro p {
  max-width: 58ch;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.experiment {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.controls {
  align-items: center;
  gap: 32px;
  padding: 15px 24px;
  background: #fff;
}

.controls legend, .controls label {
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
}
.controls legend { margin-bottom: 5px; }

button, select {
  min-height: 36px;
  padding: 6px 12px;
  border-color: #c8d6dd;
  border-radius: 5px;
  font-size: 14px;
}
button:hover { background: #edf4f6; }
.controls select { min-width: 146px; }
.controls #seed { min-width: 100px; }
.switch button { min-width: 70px; }
.switch button + button { margin-left: -1px; }
.switch button:first-child { border-radius: 5px 0 0 5px; }
.switch button:last-child { border-radius: 0 5px 5px 0; }
.switch button[aria-pressed="true"] { position: relative; border-color: transparent; }

figure { padding: 0 0 25px; }
h2 { font-weight: 600; }
.network-heading {
  align-items: center;
  gap: 24px;
  padding: 19px 24px 17px;
}
.network-heading h2 { margin-bottom: 3px; font-size: 21px; }
.network-heading p, .output-heading p { color: var(--muted); font-size: 14px; }
.layout-note { max-width: 240px; font-size: 12px; line-height: 1.45; }

/* A shared work surface: the graph and its selected-neuron explanation. */
.network-workbench {
  grid-template-columns: minmax(0, 1fr) 310px;
  align-items: stretch;
}
.network-stage { min-width: 0; background: var(--stage); }
.network-map {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-width: 0;
  background: var(--stage);
}
.network-count {
  min-width: 0;
  margin: 0;
  padding: 14px 0 14px 20px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}
.graph-toolbar { gap: 16px; padding: 12px 16px 12px 20px; }
.graph-toolbar label { gap: 4px; font-size: 12px; font-weight: 400; }
.graph-toolbar select { min-height: 33px; font-size: 13px; }
.zoom-controls { gap: 4px; }
.zoom-controls button { min-height: 33px; font-size: 13px; background: #fff; }
.zoom-controls button:hover { background: #edf4f6; }

#network-graph {
  grid-column: 1 / -1;
  width: 100%;
  height: clamp(450px, 40vw, 570px);
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
}
.graph-node text { stroke: var(--stage); }
.graph-node .major-label { font-weight: 600; }
.graph-legend {
  grid-column: 1 / -1;
  gap: 20px;
  padding: 12px 20px 0;
  font-size: 12px;
}
.graph-instruction {
  grid-column: 1 / -1;
  max-width: 90ch;
  margin: 9px 20px 17px;
  font-size: 12px;
  line-height: 1.5;
}
#network-error { grid-column: 1 / -1; }

.network-inspector {
  height: 100%;
  padding: 20px 23px;
  background: #fff;
  font-size: 14px;
  line-height: 1.55;
}
.network-inspector label { gap: 5px; color: var(--muted); font-size: 12px; font-weight: 400; }
.network-inspector select { min-height: 37px; padding: 7px 10px; font-size: 14px; }
.network-inspector h3 {
  margin: 24px 0 6px;
  font-size: 25px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -.02em;
}
.inspection-kind { margin-bottom: 17px; color: var(--muted); font-size: 12px; }
.neuron-explanation p { margin: 12px 0; }
.neuron-explanation .evidence-limit {
  margin-top: 16px;
  padding-left: 12px;
  border-left: 2px solid #ccdadf;
  color: var(--muted);
}
.role-sources, .assigned-sign { color: var(--muted); font-size: 12px; }
.neuron-details { margin-top: 22px; font-size: 13px; }
.network-inspector dt { font-size: 12px; }
.network-inspector dd { font-size: 14px; }
.source-id { font-size: 12px; }
.state-note { margin-top: 18px; padding-top: 15px; font-size: 13px; }
.inspector-footnote { margin-top: 22px; font-size: 12px; line-height: 1.5; }

/* The anatomical view uses the same tools and spacing around its dark canvas. */
#anatomy-panel { padding: 16px 18px 8px; }
#anatomy-status { margin: 8px 0 18px; font-size: 14px; }
#anatomy-status:empty { display: none; }
#neuron-anatomy { min-height: 560px; }
.morphology-toolbar { margin-bottom: 14px; gap: 14px; }
.morphology-toolbar label { gap: 4px; color: var(--muted); font-size: 12px; }
.morphology-picker { min-height: 36px; max-width: 100%; border-color: #c8d6dd; border-radius: 5px; font-size: 14px; }
.morphology-actions { gap: 4px; }
.morphology-actions button { min-height: 36px; padding: 6px 10px; border-color: #c8d6dd; border-radius: 5px; background: #fff; font-size: 13px; }
.morphology-actions button:hover { background: #edf4f6; }
.morphology-stage { height: clamp(450px, 40vw, 570px); border-radius: 4px; }
.morphology-bottom { margin: 14px 0 10px; font-size: 13px; }
.morphology-bottom label { font-size: 13px; font-weight: 400; }
.morphology-selection { min-height: 0; margin: 12px 0; font-size: 13px; overflow-wrap: anywhere; }
.morphology-note { margin: 10px 0; color: var(--muted); font-size: 12px; }

.network-workbench.body-view { grid-template-columns: 1fr; }
.experiment.body-view .network-heading,
.experiment.body-view ~ .framing,
.experiment.body-view ~ .details-row { display: none; }
.body-view .network-stage { background: #fff; }
#body-frame { display: block; width: 100%; height: var(--body-height, 1030px); border: 0; background: #fff; }
#body-status { margin: 16px 24px; color: var(--muted); font-size: 14px; }

.output-heading { padding: 25px 6% 0; }
.output-heading h2 { font-size: 21px; }
#chart { margin-top: 10px; font-family: "Source Sans 3", "Segoe UI", sans-serif; }
.legend { gap: 24px; padding: 0 6%; font-size: 14px; }
.legend .muted { color: var(--muted); font-size: 12px; }
.playback { margin: 20px 6% 17px; }
.time-label { color: var(--muted); font-size: 12px; font-weight: 400; }
.time-label output { color: var(--ink); font-size: 14px; }
.paired-result { min-height: 2.8em; margin: 0 6%; font-size: 16px; line-height: 1.5; }
.framing { max-width: 100ch; margin: 22px 0; font-size: 13px; line-height: 1.65; }
.details-row { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; }
details { padding-top: 14px; font-size: 14px; line-height: 1.65; }
summary { width: fit-content; color: var(--ink); font-weight: 600; }
details p { max-width: 84ch; }

@media (max-width: 1100px) {
  :root { --page-gutter: 24px; }
  .network-workbench { grid-template-columns: minmax(0, 1fr) 280px; }
  .network-count { grid-column: 1 / -1; padding-bottom: 0; }
  .graph-toolbar { grid-column: 1 / -1; padding-top: 10px; }
  .network-inspector { padding: 20px; }
  .controls { gap: 24px; }
  .project-intro { align-items: flex-start; }
  .project-intro p { max-width: 40ch; }
}

@media (max-width: 800px) {
  :root { --page-gutter: 20px; }
  .appbar { grid-template-columns: 1fr auto; gap: 0 16px; min-height: 0; }
  .app-brand { padding: 14px 0 10px; font-size: 17px; }
  .app-brand span { display: none; }
  .back-link { grid-column: 2; grid-row: 1; font-size: 13px; }
  .explorer-tabs { grid-column: 1 / -1; justify-self: start; gap: 16px; }
  .explorer-tabs button { min-height: 45px; padding: 0 9px; }
  .explorer-tabs button:first-child { padding-left: 0; padding-right: 18px; }
  .project-intro { display: block; margin: 22px 0 18px; }
  .project-intro p { max-width: none; margin-top: 7px; font-size: 14px; }
  .network-workbench { grid-template-columns: minmax(0, 1fr) 255px; }
  .network-heading { display: block; padding: 18px 20px 15px; }
  .layout-note { display: block; max-width: none; margin-top: 8px; text-align: left; }
  .network-inspector { padding: 18px; }
  .graph-toolbar { flex-wrap: wrap; gap: 10px; }
  .graph-toolbar label { flex: 1 1 100%; }
  .graph-toolbar select { width: 100%; max-width: none; }
  #network-graph { height: 470px; }
  .controls { padding: 15px 20px; gap: 14px 24px; }
  .controls label { min-width: 140px; }
  .morphology-toolbar label { width: 100%; }
  .morphology-picker { width: 100%; }
}

@media (max-width: 680px) {
  :root { --page-gutter: 14px; }
  main { padding-bottom: 32px; }
  .appbar { gap: 0 14px; }
  .explorer-tabs { width: 100%; justify-self: stretch; gap: 0; }
  .explorer-tabs button,
  .explorer-tabs button:first-child { flex: 1; min-height: 44px; padding: 0 5px; font-size: 14px; }
  .explorer-tabs button:focus-visible { outline-offset: -5px; }
  .project-intro { margin: 20px 0 16px; }
  .project-intro h1 { font-size: 23px; }
  .experiment { border-radius: 6px; }
  .controls { align-items: end; gap: 14px 16px; padding: 15px 16px; }
  .controls fieldset { width: 100%; }
  .controls label { flex: 1; min-width: 115px; }
  .controls select, .controls #seed { width: 100%; min-width: 0; }
  .switch { width: fit-content; }
  .switch button { min-width: 82px; min-height: 40px; }
  .network-heading { padding: 18px 16px 15px; }
  .network-heading h2 { font-size: 20px; }
  .network-heading p { max-width: 46ch; }
  .network-workbench { grid-template-columns: minmax(0, 1fr); }
  .network-count { padding: 14px 16px 0; }
  .graph-toolbar { flex-wrap: nowrap; gap: 10px; padding: 10px 16px 5px; }
  .graph-toolbar label { flex: 1; min-width: 0; }
  .graph-toolbar select { width: 100%; min-width: 0; font-size: 12px; }
  .zoom-controls { gap: 3px; align-self: end; }
  .zoom-controls button { min-height: 35px; padding: 5px 7px; white-space: nowrap; font-size: 12px; }
  .zoom-controls button:first-child, .zoom-controls button:nth-child(2) { min-width: 31px; padding: 0 6px; }
  #network-graph { height: auto; aspect-ratio: 960 / 590; }
  .graph-node .major-label { font-size: 34px; }
  .graph-node .minor-label { font-size: 29px; }
  .graph-legend { gap: 10px 16px; padding: 8px 16px 0; }
  .graph-instruction { margin: 9px 16px 17px; }
  .network-inspector { border-top: 1px solid var(--line); border-left: 0; padding: 20px; }
  .network-inspector h3 { margin-top: 20px; font-size: 25px; }
  .network-inspector dl { display: block; }
  .network-inspector dd { margin-top: 3px; }
  .network-inspector dt:first-child + dd { margin-top: 3px; }
  .neuron-explanation { max-width: 65ch; font-size: 15px; }
  .inspector-footnote { margin-top: 18px; }
  #anatomy-panel { padding: 14px 12px 6px; }
  #neuron-anatomy { min-height: 480px; }
  .morphology-toolbar { align-items: stretch; margin-bottom: 12px; }
  .morphology-toolbar label { width: 100%; }
  .morphology-actions { flex-wrap: nowrap; }
  .morphology-actions button { min-height: 38px; padding: 6px 10px; }
  .morphology-stage { height: 420px; }
  .morphology-bottom { align-items: flex-start; flex-direction: column; gap: 7px; }
  #body-frame { height: var(--body-height, 1250px); }
  .output-heading { padding: 22px 6% 0; }
  .output-heading h2 { font-size: 20px; }
  .legend { flex-wrap: wrap; gap: 8px 20px; padding: 0 6%; }
  .legend .muted { width: 100%; }
  .playback { gap: 10px; margin: 18px 6%; }
  .playback button { padding: 6px 11px; }
  .paired-result { font-size: 15px; }
  .framing { margin: 20px 2px; }
  .details-row { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  details { padding-top: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .graph-link .edge-ink { transition: none; }
}

/* Progressive disclosure follows the active view, including lazy/generated UI. */
#fly-explorer.progressive-enabled[data-advanced="false"] [data-advanced-only] { display: none !important; }
#fly-explorer[data-view="anatomy"] #node-picker-control { display: none !important; }
.paired-settings { display: flex; align-items: end; flex-wrap: wrap; gap: 16px; }
#advanced-toggle { margin-left: auto; min-height: 38px; padding: 7px 14px; font-size: 14px; background: #fff; }
#advanced-toggle[aria-expanded="true"] { background: #e7f1f3; border-color: var(--kept); }
.experiment-summary { flex-basis: 100%; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.5; }
.controls { gap: 12px 20px; padding-block: 14px; }
.controls fieldset { width: auto; }
.network-heading { padding-block: 15px; }
.network-heading h2 { font-size: 19px; }
.network-workbench { grid-template-columns: minmax(0, 1fr) minmax(360px, 430px); }
#network-graph { height: clamp(360px, 37vw, 500px); }
.graph-toolbar { grid-column: 2; }
.graph-legend { gap: 10px 16px; font-size: 12px; padding-bottom: 14px; }
.network-inspector { padding: 18px 20px; }
#paired-output { padding-bottom: 19px; margin-bottom: 19px; border-bottom: 1px solid var(--line); }
.network-inspector .output-heading { padding: 0; }
.network-inspector .output-heading h2 { margin-bottom: 4px; font-size: 19px; }
.network-inspector .output-heading p { font-size: 13px; line-height: 1.45; }
.network-inspector #chart { width: 100%; height: auto; margin-top: 8px; }
.network-inspector .legend { gap: 7px 18px; flex-wrap: wrap; padding: 0; font-size: 13px; }
.network-inspector .legend .muted { display: none; }
.network-inspector .playback { gap: 9px; margin: 12px 0; }
.network-inspector .playback button { padding-inline: 10px; }
.network-inspector .time-label { min-width: 68px; }
.network-inspector .paired-result { min-height: 0; margin: 0; font-size: 14px; line-height: 1.5; }
.model-boundary { margin: 9px 0 0; color: var(--muted); font-size: 12px; line-height: 1.5; }
.network-inspector h3 { margin-top: 17px; font-size: 22px; }
.network-inspector .inspection-kind { margin-bottom: 10px; }
.neuron-explanation p { font-size: 14px; line-height: 1.5; }
.neuron-explanation .evidence-limit { margin-top: 11px; padding-left: 10px; font-size: 13px; }
.neuron-details { margin-top: 16px; }
.neuron-details h4 { margin: 0 0 8px; font-size: 14px; font-weight: 600; }
#neuron-anatomy { min-height: 0; }
.morphology-stage { height: clamp(360px, 37vw, 500px); }
.morphology-boundary { margin: 8px 0; color: var(--muted); font-size: 12px; line-height: 1.5; }
.morphology-selection { font-size: 13px; line-height: 1.5; }
.morphology-selection [data-advanced-only] { display: block; margin-top: 4px; }
.details-row { display: block; }
#reference-material h3 { margin: 20px 0 9px; font-size: 17px; }
@media (max-width: 1050px) {
  .network-workbench { grid-template-columns: minmax(0, 1fr) minmax(320px, .8fr); }
  .network-inspector { padding: 16px; }
  .graph-toolbar { flex-wrap: wrap; justify-content: flex-end; gap: 6px; }
}
@media (max-width: 800px) {
  .network-workbench { grid-template-columns: minmax(0, 1fr); }
  .network-inspector { border-left: 0; border-top: 1px solid var(--line); }
  .network-inspector #chart { max-width: 580px; margin-inline: auto; }
  #network-graph { height: auto; aspect-ratio: 960 / 590; }
  .morphology-stage { height: 390px; }
  .paired-settings { flex: 1 1 100%; gap: 12px; }
  .paired-settings label { min-width: 130px; }
  #advanced-toggle { align-self: end; }
}