/* Nocturne tokens (from the Claude Design system) + page styles for the Map of Knowledge. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --color-bg: #161826;
  --color-surface: #232532;
  --color-text: #e9e9ed;
  --color-accent: #9184d9;
  --color-accent-2: #a7a1db;
  --color-divider: color-mix(in srgb, #e9e9ed 16%, transparent);

  --color-neutral-100: #f3f5fe;
  --color-neutral-200: #e4e7f5;
  --color-neutral-300: #cfd3e5;
  --color-neutral-400: #b2b6ca;
  --color-neutral-500: #9397ab;
  --color-neutral-600: #75798c;
  --color-neutral-700: #595d6c;
  --color-neutral-800: #3f424d;
  --color-neutral-900: #292b31;

  --color-accent-100: #f5f4ff;
  --color-accent-200: #e7e5fe;
  --color-accent-300: #d2cefd;
  --color-accent-400: #b5abfc;
  --color-accent-500: #968ae0;
  --color-accent-600: #796cbf;
  --color-accent-700: #5d5294;
  --color-accent-800: #423a6a;
  --color-accent-900: #2b2741;

  --color-accent-2-800: #423e5d;
  --color-accent-2-900: #2b293a;

  --font-heading: "Inter", system-ui, sans-serif;
  --font-heading-weight: 500;
  --font-body: "Inter", system-ui, sans-serif;

  --space-1: 2.8px;
  --space-2: 5.6px;
  --space-3: 8.4px;
  --space-4: 11.2px;
  --space-6: 16.8px;
  --space-8: 22.4px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  --shadow-sm: 0 0 0 1px #3f424d;
  --shadow-md: 0 0 0 1px #595d6c, 0 6px 18px rgba(0,0,0,0.55);
  --shadow-lg: 0 0 0 1px #9397ab, 0 16px 40px rgba(0,0,0,0.65);
}

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--color-bg); }
body {
  margin: 0; font-size: 15px; line-height: 1.55; font-weight: 400;
  background: var(--color-bg); color: var(--color-text); font-family: var(--font-body);
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  line-height: 1.12; letter-spacing: -0.015em; margin: 0 0 var(--space-2);
}
p { margin: 0 0 var(--space-3); }
a { color: var(--color-accent-300); text-decoration: none; }
a:hover { color: var(--color-accent-200); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }
button { font-family: var(--font-body); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 12px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid transparent;
  padding: 4px 10px; border-radius: var(--radius-md);
}
.btn-primary { color: var(--color-accent); border-color: var(--color-accent); }
.btn-primary:hover { background: color-mix(in srgb, var(--color-accent) 12%, transparent); }
.btn-secondary { border-color: var(--color-divider); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-ghost { color: var(--color-accent); padding-inline: var(--space-1); }
.btn-ghost:hover { background: color-mix(in srgb, var(--color-accent) 10%, transparent); }

/* input */
.input {
  min-height: 32px; padding: 6px 10px; font: inherit; font-size: 14px;
  color: var(--color-text); caret-color: var(--color-accent);
  background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-md);
}
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }

/* tags, cards */
.tag {
  display: inline-flex; align-items: center; font-size: 10px; letter-spacing: 0.02em;
  padding: 3px 10px; border-radius: calc(var(--radius-md) * 0.75);
}
.tag-neutral { background: var(--color-neutral-800); color: var(--color-neutral-100); }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent); }
.card {
  display: flex; flex-direction: column; gap: var(--space-2);
  padding: var(--space-6); border-radius: var(--radius-lg); background: var(--color-surface);
}

/* layout */
.page { min-height: 100vh; padding: 0 0 24px; display: flex; flex-direction: column; }
.body { flex: 1 0 auto; }

/* dataset loading state: fixed overlay so it is visible wherever the user scrolled */
.loading {
  position: fixed; inset: 0; z-index: 40;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  background: color-mix(in srgb, var(--color-bg) 72%, transparent);
  backdrop-filter: blur(2px);
}
.loading[hidden] { display: none; }
.loading-bar {
  width: min(420px, 70vw); height: 6px; border-radius: 3px;
  background: var(--color-neutral-900); overflow: hidden;
}
.loading-fill { height: 100%; width: 0%; border-radius: 3px; background: var(--color-accent-500); transition: width .12s ease; }
.loading-label { font-size: 12px; color: var(--color-neutral-500); }

.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-divider);
  padding: 14px 28px 12px;
}
.topbar-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.title-row { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.title-row h1 { font-size: 26px; margin: 0; }
.kicker { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-accent-300); }
.lede { margin: 4px 0 0; font-size: 12.5px; color: var(--color-neutral-400); max-width: 860px; }
.stats { display: flex; gap: 18px; }
.stat-n { font-size: 20px; font-family: var(--font-heading); }
.stat-n.accent { color: var(--color-accent-300); }
.stat-l { font-size: 9.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-neutral-500); }
.controls { display: flex; align-items: center; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.tabs { display: flex; gap: 4px; }
.tab {
  cursor: pointer; background: transparent; border: 1px solid transparent;
  font-family: var(--font-heading); font-size: 12.5px; color: var(--color-neutral-400);
  padding: 4px 10px; border-radius: var(--radius-md);
}
.tab:hover { color: var(--color-text); background: color-mix(in srgb, var(--color-text) 6%, transparent); }
.tab.active { color: var(--color-accent-200); border-color: var(--color-accent-700); background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.controls .input { width: 220px; max-width: 100%; }
.filters { display: flex; gap: 6px; flex-wrap: wrap; }
.vsep { width: 1px; height: 20px; background: var(--color-divider); }
.status { font-size: 11.5px; color: var(--color-neutral-500); }

.body { display: flex; align-items: flex-start; gap: 0; min-width: 0; }

/* sidebar field tree */
.sidebar {
  flex: 0 0 250px; position: sticky; top: 112px;
  max-height: calc(100vh - 112px); overflow-y: auto;
  padding: 14px 8px 28px 16px; border-right: 1px solid var(--color-divider);
}
.sidebar summary {
  cursor: pointer; list-style: none; display: flex; align-items: baseline; gap: 7px;
  padding: 3px 6px; border-radius: var(--radius-sm); user-select: none;
}
.sidebar summary::-webkit-details-marker { display: none; }
.sidebar summary::before {
  content: "\25B8"; font-size: 8.5px; color: var(--color-neutral-600);
  flex: none; transition: transform .15s ease;
}
.sidebar details[open] > summary::before { transform: rotate(90deg); }
.sidebar summary:hover { background: color-mix(in srgb, var(--color-text) 6%, transparent); }
.t-branch-name { font-family: var(--font-heading); font-size: 12.5px; color: var(--color-neutral-200); }
.t-code { font-size: 9.5px; letter-spacing: 0.12em; color: var(--color-accent-400); width: 17px; flex: none; font-variant-numeric: tabular-nums; }
.t-div { margin-left: 13px; }
.t-div-name { font-size: 11px; color: var(--color-neutral-300); }
.t-group { margin-left: 13px; }
.t-group-name { font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-neutral-500); }
.t-fields { display: flex; flex-direction: column; margin-left: 19px; padding: 1px 0 4px; }
.t-field {
  text-align: left; background: transparent; border: 0; cursor: pointer;
  font-size: 11.5px; line-height: 1.4; padding: 2px 6px; border-radius: var(--radius-sm);
  color: var(--color-neutral-400);
}
.t-field:hover { color: var(--color-accent-100); background: color-mix(in srgb, var(--color-text) 6%, transparent); }
.t-field.sel { color: var(--color-accent-100); background: color-mix(in srgb, var(--color-accent) 18%, transparent); }
.t-fdetails { display: block; }
.t-fsum { padding: 0 !important; }
.t-fsum::before { align-self: center; }
.t-subfields { display: flex; flex-direction: column; margin-left: 16px; border-left: 1px solid var(--color-neutral-800); padding-left: 4px; }
.t-field.t-subfield { font-size: 11px; color: var(--color-neutral-500); }
.t-wiki { display: inline-block; margin-left: 4px; font-size: 11px; color: var(--color-accent-300); }
.t-wiki:hover { color: var(--color-accent-100); }
.wiki-link { display: inline-block; margin-top: 8px; font-size: 12.5px; color: var(--color-accent-300); }
.wiki-link:hover { color: var(--color-accent-100); }
@media (max-width: 1100px) { .sidebar { display: none; } }
main { flex: 1; min-width: 0; padding: 20px 22px 0 28px; }
.canvas { position: relative; }
.link-layer { position: absolute; inset: 0; z-index: 4; pointer-events: none; }
.link-layer svg { position: absolute; left: 0; top: 0; overflow: visible; }
.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 14px; align-items: start; }

section.branch {
  grid-column: span 12; /* datasets can have any number of branches; the .b-NN rules only add backgrounds */
  padding: var(--space-6); border: 1px solid var(--color-divider); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.branch-head { display: flex; align-items: baseline; gap: 10px; }
.branch-code { font-size: 11px; letter-spacing: 0.16em; color: var(--color-accent-400); }
.branch-head h3 { font-size: 21px; margin: 0; }
.branch-count { margin-left: auto; font-size: 11px; color: var(--color-neutral-500); }
.branch-desc { margin: 5px 0 0; font-size: 11.5px; color: var(--color-neutral-400); }
.division-head {
  margin: 24px 0 0; padding-bottom: 5px; border-bottom: 1px solid var(--color-divider);
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 15.5px; color: var(--color-neutral-200);
}
.groups { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 4px 20px; align-items: start; }
.group { margin-top: 14px; }
section.branch, .division-head, .group { scroll-margin-top: 122px; }
.group-name { font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-neutral-500); }
.group-name::before {
  content: ""; display: inline-block; width: 12px; height: 1px; background: var(--color-accent-600);
  vertical-align: middle; margin-right: 6px;
}
.chips { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 7px; }

/* per-branch grounds */
.b-00 { grid-column: span 12; background: linear-gradient(158deg, color-mix(in srgb, var(--color-neutral-900) 80%, var(--color-surface)), var(--color-bg) 82%); }

.b-01 { grid-column: span 12; background: linear-gradient(158deg, color-mix(in srgb, var(--color-accent-900) 70%, var(--color-surface)), var(--color-bg) 82%); }
.b-02 { grid-column: span 12; background: linear-gradient(158deg, color-mix(in srgb, var(--color-neutral-900) 80%, var(--color-surface)), var(--color-bg) 82%); }
.b-03 { grid-column: span 12; background: linear-gradient(158deg, color-mix(in srgb, var(--color-accent-2-900) 70%, var(--color-surface)), var(--color-bg) 82%); }
.b-04 { grid-column: span 12; background: linear-gradient(158deg, color-mix(in srgb, var(--color-neutral-800) 45%, var(--color-surface)), var(--color-bg) 82%); }
.b-05 { grid-column: span 12; background: linear-gradient(158deg, color-mix(in srgb, var(--color-accent-900) 55%, var(--color-surface)), var(--color-bg) 82%); }
.b-06 { grid-column: span 12; background: linear-gradient(158deg, color-mix(in srgb, var(--color-neutral-900) 65%, var(--color-surface)), var(--color-bg) 82%); }
.b-07 { grid-column: span 12; background: linear-gradient(158deg, color-mix(in srgb, var(--color-accent-2-900) 55%, var(--color-surface)), var(--color-bg) 82%); }
.b-08 { grid-column: span 12; background: linear-gradient(158deg, color-mix(in srgb, var(--color-neutral-800) 30%, var(--color-surface)), var(--color-bg) 82%); }
.b-09 {
  grid-column: span 12; padding-bottom: var(--space-8);
  background: linear-gradient(158deg, color-mix(in srgb, var(--color-neutral-800) 55%, var(--color-surface)), var(--color-bg) 84%);
}
.b-10 {
  grid-column: span 12; padding-bottom: var(--space-8);
  background: linear-gradient(158deg, color-mix(in srgb, var(--color-accent-2-800) 45%, var(--color-surface)), var(--color-bg) 84%);
}

/* chips */
.chip {
  display: inline-flex; align-items: center; cursor: pointer;
  font-size: 11.5px; line-height: 1.25; padding: 3px 7px;
  border-radius: var(--radius-sm); border: 1px solid var(--color-neutral-800);
  background: transparent; color: var(--color-neutral-300);
  transition: opacity .18s ease, border-color .18s ease, color .18s ease;
}
.chip .m { font-size: 9px; opacity: 0.8; margin-left: 3px; }
.chip:hover { border-color: var(--color-accent-500); color: var(--color-accent-100); }
.b-09 .chip:hover { border-color: var(--color-accent-400); }
.chip.contested { border-style: dashed; }
.chip.x { border-color: var(--color-accent-800); color: var(--color-accent-200); }
.chip.linked { border-color: var(--color-accent-500); color: var(--color-accent-200); }
.chip.sel {
  border-color: var(--color-accent); border-style: solid; color: var(--color-accent-100);
  background: color-mix(in srgb, var(--color-accent) 20%, transparent);
  box-shadow: 0 0 22px -6px var(--color-accent);
}
.chip.dim { opacity: 0.18; }
.chip.has-sub { border-style: solid; border-color: var(--color-neutral-700); }
.subwrap {
  display: inline-flex; flex-wrap: wrap; gap: 4px; align-items: center;
  padding-left: 8px; margin-left: 2px; border-left: 1px solid var(--color-neutral-800);
}
.chip.subchip { font-size: 10.5px; padding: 2px 6px; color: var(--color-neutral-400); }
.compact .chip { font-size: 10.5px; padding: 2px 6px; }

.note-h { font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-neutral-500); }
.note-p { margin: 6px 0 0; font-size: 12px; color: var(--color-neutral-400); }

/* floating selection panel */
.float {
  position: fixed; right: 22px; bottom: 22px; z-index: 30; width: 372px; max-width: calc(100vw - 44px);
}
.float[hidden] { display: none; }
.panel-sel { box-shadow: var(--shadow-lg); max-height: calc(100vh - 140px); overflow: auto; }
.panel-head { display: flex; align-items: baseline; gap: 8px; }
.panel-code { font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-accent-300); }
.panel-path { font-size: 10.5px; color: var(--color-neutral-500); }
.panel-close { margin-left: auto; font-size: 11px; padding: 0 4px; }
.panel-sel h4 { margin: 8px 0 0; font-size: 21px; }
.tags { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.panel-note { margin: 12px 0 0; font-size: 12.5px; color: var(--color-neutral-300); }
.sect { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--color-divider); }
.sect-p { margin: 5px 0 0; font-size: 12px; color: var(--color-neutral-400); }
.links { display: flex; flex-direction: column; gap: 7px; margin-top: 8px; }
.link {
  text-align: left; background: transparent; border: 0; border-left: 1px solid var(--color-accent-600);
  padding: 2px 0 2px 9px; cursor: pointer;
}
.link:hover { border-left-color: var(--color-accent-300); }
.link .d { display: block; font-size: 12px; color: var(--color-neutral-300); }
.link .a { display: block; font-size: 12.5px; color: var(--color-accent-300); }
.sibs { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.sib {
  font-size: 11px; padding: 3px 7px; border-radius: var(--radius-sm); border: 1px solid var(--color-neutral-800);
  background: transparent; color: var(--color-neutral-300); cursor: pointer;
}
.sib:hover { border-color: var(--color-accent-500); color: var(--color-accent-200); }

/* footer */
.site-footer {
  margin-top: auto; padding: 14px 28px 0; border-top: 1px solid var(--color-divider);
  font-size: 11px; color: var(--color-neutral-500);
}
.site-footer a { color: var(--color-neutral-400); }
.site-footer a:hover { color: var(--color-accent-300); }

/* responsive */
main { padding-right: 28px; }
@media (max-width: 900px) {
  .title-row h1 { font-size: 21px; }
  .stat-n { font-size: 16px; }
  .branch-head h3 { font-size: 18px; }
  section.branch { padding: var(--space-4); }
  .groups { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
}
@media (max-width: 700px) {
  .topbar { padding-left: 12px; padding-right: 12px; }
  .topbar-row { gap: 10px; }
  .stats { gap: 12px; }
  .controls { gap: 6px; }
  .controls .input { flex: 1 1 140px; width: auto; }
  .tabs { width: 100%; overflow-x: auto; flex-wrap: nowrap; scrollbar-width: none; }
  .tabs::-webkit-scrollbar { display: none; }
  .tab { flex: none; }
  .controls > .vsep { display: none; }
  main { padding: 12px 10px 0; }
  .grid { gap: 10px; }
  .groups { grid-template-columns: 1fr; }
  .division-head { font-size: 14px; margin-top: 18px; }
  .branch-desc { font-size: 11px; }
  .float { left: 10px; right: 10px; bottom: 10px; width: auto; max-width: none; }
  .panel-sel { max-height: 55vh; }
}

/* ---- The Concordance (the seven systems joined; tab + per-field panel section) ---- */
:root {
  --sys-knowledge: #b5abfc;
  --sys-arxiv: #e08b8b;
  --sys-philpapers: #7fc7bd;
  --sys-ssrn: #94c47f;
  --sys-msc: #82aede;
  --sys-acm: #dcab72;
  --sys-jel: #d8ca74;
}
body.conc #toggleLinks, body.conc #toggleDensity { display: none; }

.dots { display: inline-flex; gap: 3px; flex: none; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--sc); }

/* sidebar: filters + concept list */
.conc-filters { display: flex; flex-wrap: wrap; gap: 4px; padding: 2px 6px 10px; }
.cf {
  cursor: pointer; background: transparent; border: 1px solid var(--color-neutral-800);
  font-family: var(--font-heading); font-size: 10.5px; color: var(--color-neutral-400);
  padding: 2px 8px; border-radius: var(--radius-md);
}
.cf:hover { color: var(--color-text); }
.cf.active { color: var(--color-accent-200); border-color: var(--color-accent-700); background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.sf {
  cursor: pointer; background: transparent; border: 1px solid var(--color-neutral-800);
  font-size: 9.5px; padding: 2px 7px; border-radius: var(--radius-md); color: var(--color-neutral-400);
}
.sf.active { color: var(--color-bg); background: var(--sc); border-color: var(--sc); font-weight: 600; }
.sf:not(.active):hover { border-color: var(--sc); color: var(--sc); }
.c-item {
  display: flex; align-items: center; gap: 8px; width: 100%;
  text-align: left; background: transparent; border: 0; cursor: pointer;
  font-size: 12px; line-height: 1.4; padding: 3px 8px; border-radius: var(--radius-sm);
  color: var(--color-neutral-300);
}
.c-item:hover { color: var(--color-accent-100); background: color-mix(in srgb, var(--color-text) 6%, transparent); }
.c-item.sel { color: var(--color-accent-100); background: color-mix(in srgb, var(--color-accent) 18%, transparent); }
.c-item.hide { display: none; }
.c-item .nm { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.list-more { margin: 8px; font-size: 11.5px; }

/* main: landing + concept view live in a full-width grid section */
.conc-main { grid-column: span 12; max-width: 1060px; }
.conc-main .lede { font-size: 14px; max-width: 760px; color: var(--color-neutral-300); }
.conc-main h2 { font-size: 17px; margin: 30px 0 4px; }
.conc-main .sub { font-size: 12px; color: var(--color-neutral-500); margin-bottom: 12px; }
.bg-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.bg-card {
  cursor: pointer; text-align: left; border: 1px solid var(--color-divider); background: var(--color-surface);
  border-radius: var(--radius-md); padding: 10px 12px; display: flex; flex-direction: column; gap: 6px;
}
.bg-card:hover { border-color: var(--color-accent-600); }
.bg-card .nm { font-family: var(--font-heading); font-size: 13.5px; color: var(--color-neutral-100); }

.matrix-wrap { overflow-x: auto; }
.matrix { border-collapse: collapse; font-size: 11.5px; font-variant-numeric: tabular-nums; }
.matrix th { font-weight: 500; padding: 5px 10px; text-align: right; color: var(--sc); }
.matrix th.rowh { text-align: left; }
.matrix td { padding: 5px 10px; text-align: right; color: var(--color-neutral-300); border: 1px solid var(--color-neutral-900); background: color-mix(in srgb, var(--color-accent) calc(var(--heat) * 1%), transparent); }
.matrix td.z { color: var(--color-neutral-700); }

.concept h2 { font-size: 26px; margin: 0 0 2px; }
.c-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.c-claims { font-size: 12px; color: var(--color-neutral-500); }
.status-tag { font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; padding: 2px 8px; border-radius: var(--radius-sm); border: 1px dashed var(--color-accent-500); color: var(--color-accent-300); }
.c-wiki { margin-top: 10px; font-size: 13px; color: var(--color-neutral-400); max-width: 780px; }
.c-note {
  margin-top: 14px; padding: 12px 16px; max-width: 780px;
  border-left: 2px solid var(--color-accent-500); background: color-mix(in srgb, var(--color-accent) 7%, transparent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0; font-size: 13px; color: var(--color-neutral-200);
}
.c-note .h { font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-accent-300); margin-bottom: 4px; }

.sys-cards { display: flex; flex-direction: column; gap: 12px; margin-top: 22px; }
.sys-card {
  border: 1px solid var(--color-divider); border-left: 3px solid var(--sc);
  border-radius: var(--radius-md); background: var(--color-surface); padding: 12px 16px;
}
.sys-card .sys-name { font-family: var(--font-heading); font-size: 13px; color: var(--sc); display: flex; align-items: baseline; gap: 8px; }
.sys-card .sys-name .cnt { font-size: 10.5px; color: var(--color-neutral-500); font-family: var(--font-body); }
.placements { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; }
.crumbs { font-size: 12.5px; color: var(--color-neutral-400); line-height: 1.6; }
.crumbs .sep { color: var(--color-neutral-700); margin: 0 5px; }
.crumbs .leaf { color: var(--color-neutral-100); }
.crumbs button.leaf { background: none; border: 0; padding: 0; font: inherit; cursor: pointer; }
.crumbs button.leaf:hover { color: var(--sc); }
.crumbs a.ext { margin-left: 7px; font-size: 11px; color: var(--sc); opacity: 0.85; }
.crumbs a.ext:hover { opacity: 1; }
.show-more { align-self: flex-start; margin-top: 2px; font-size: 11.5px; color: var(--color-accent-300); background: none; border: 0; cursor: pointer; padding: 0; }
.show-more:hover { color: var(--color-accent-100); }
.absent { font-size: 11.5px; color: var(--color-neutral-600); margin-top: 8px; }
.back { font-size: 12px; margin-bottom: 14px; display: inline-block; cursor: pointer; background: none; border: 0; color: var(--color-accent-300); padding: 0; }
.back:hover { color: var(--color-accent-100); }

/* per-field panel section: compact breadcrumbs per other system */
.conc-sect .crumbs { font-size: 11.5px; }
.conc-sect .sys-tag { font-size: 10px; font-family: var(--font-heading); color: var(--sc); margin-right: 6px; }
.conc-sect .rows { display: flex; flex-direction: column; gap: 5px; margin-top: 7px; }
.conc-open { display: inline-block; margin-top: 9px; font-size: 12px; color: var(--color-accent-300); background: none; border: 0; cursor: pointer; padding: 0; }
.conc-open:hover { color: var(--color-accent-100); }

/* the concordance control reads as a feature, not an eighth catalogue */
.tabs .vsep { margin: 0 4px; align-self: center; }
.tab-conc {
  color: var(--color-accent-300); border-color: var(--color-accent-800);
  background: color-mix(in srgb, var(--color-accent) 6%, transparent);
}
.tab-conc:hover { color: var(--color-accent-100); border-color: var(--color-accent-600); background: color-mix(in srgb, var(--color-accent) 14%, transparent); }
.tab-conc.active { color: var(--color-accent-100); border-color: var(--color-accent-500); box-shadow: 0 0 18px -8px var(--color-accent); }