:root {
  --bg: #0f1416;
  --panel: #161d21;
  --panel-2: #1d262b;
  --border: #2a353b;
  --text: #e8edee;
  --text-dim: #9db0b6;
  --accent: #4fd1c5;
  --accent-ink: #0b1416;
  --warn: #f6ad55;
  --danger: #f56565;
  --ch1: #ff5c7a;
  --ch2: #4fd1c5;
  --skin: #2a3439;
  --skin-edge: #4a5a62;
  --region-line: rgba(157, 176, 182, 0.28);
  --muscle: #e07a66;
  --nerve: #f2c14e;
  --bone: #c3cad6;
  --release: #b794f4;
  --radius: 10px;
  --header-h: 60px;
  font-size: 15px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f4f7f7; --panel: #ffffff; --panel-2: #eef2f3; --border: #dbe3e5;
    --text: #16232a; --text-dim: #55686f; --accent: #0f8c81; --accent-ink: #ffffff;
    --warn: #b7600b; --danger: #c53030; --ch1: #d6234b; --ch2: #0f8c81;
    --skin: #e9e2da; --skin-edge: #b9aea2; --region-line: rgba(80, 90, 96, 0.28);
    --muscle: #c4533e; --nerve: #b8860b; --bone: #6b7588; --release: #7c4dcc;
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #f4f7f7; --panel: #ffffff; --panel-2: #eef2f3; --border: #dbe3e5;
  --text: #16232a; --text-dim: #55686f; --accent: #0f8c81; --accent-ink: #ffffff;
  --warn: #b7600b; --danger: #c53030; --ch1: #d6234b; --ch2: #0f8c81;
  --skin: #e9e2da; --skin-edge: #b9aea2; --region-line: rgba(80, 90, 96, 0.28);
  --muscle: #c4533e; --nerve: #b8860b; --bone: #6b7588; --release: #7c4dcc;
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  line-height: 1.45;
  min-height: 100vh;
}
a { color: var(--accent); }
button { font: inherit; color: inherit; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- header ---------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; gap: 12px;
  height: var(--header-h); padding: 0 18px;
  background: var(--panel); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; font-size: 1.02rem; white-space: nowrap; text-decoration: none; color: var(--text); }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.search { position: relative; flex: 1; max-width: 460px; margin-left: auto; }
.search input {
  width: 100%; padding: 9px 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text); font-size: 0.92rem;
}
.search input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.search-results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0; z-index: 40;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 12px 30px rgba(0,0,0,.3); max-height: 60vh; overflow-y: auto; padding: 6px;
}
.search-results[hidden] { display: none; }
.sr-group { font-size: .7rem; text-transform: uppercase; letter-spacing: .07em; color: var(--text-dim); padding: 8px 8px 4px; }
.sr-item { display: flex; gap: 8px; align-items: baseline; width: 100%; text-align: left; border: 0; background: none; padding: 7px 8px; border-radius: 6px; cursor: pointer; }
.sr-item small { color: var(--text-dim); }
.sr-item[aria-selected="true"], .sr-item:hover { background: var(--panel-2); }
.icon-btn {
  border: 1px solid var(--border); background: var(--panel-2); border-radius: 8px;
  padding: 8px 11px; cursor: pointer; font-size: .85rem; white-space: nowrap;
}
.icon-btn:hover { border-color: var(--accent); }

/* ---------- layout ---------- */
.app { display: grid; grid-template-columns: minmax(0, 1fr) minmax(380px, 520px); min-height: calc(100vh - var(--header-h)); }
.stage {
  position: sticky; top: var(--header-h); height: calc(100vh - var(--header-h));
  display: flex; flex-direction: column; min-width: 0;
  border-right: 1px solid var(--border);
}
.stage-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 10px 14px; border-bottom: 1px solid var(--border); }
.seg { display: inline-flex; background: var(--panel-2); border: 1px solid var(--border); border-radius: 9px; padding: 3px; gap: 2px; flex-wrap: wrap; }
.seg button { border: 0; background: none; padding: 6px 10px; border-radius: 6px; cursor: pointer; font-size: .82rem; color: var(--text-dim); display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.seg button:disabled { opacity: .35; cursor: not-allowed; }
.swatch { width: 9px; height: 9px; border-radius: 3px; display: inline-block; }
.back-link { border: 1px solid var(--border); background: var(--panel-2); border-radius: 8px; padding: 6px 10px; font-size: .82rem; cursor: pointer; white-space: nowrap; flex: none; }

.figures { position: relative; flex: 1; min-height: 0; display: flex; gap: 8px; padding: 8px 12px 4px; }
.figure { position: relative; flex: 1; min-width: 0; display: flex; flex-direction: column; align-items: center; }
.figure-title { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-dim); margin: 2px 0 4px; }
.figure svg { width: 100%; flex: 1; min-height: 0; display: block; touch-action: manipulation; }
.stage-foot { padding: 4px 14px 10px; font-size: .78rem; color: var(--text-dim); min-height: 30px; }
.stage-foot .legend { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.stage-foot .legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -2px; margin-right: 4px; }
.notice { font-size: .8rem; color: var(--warn); }

/* ---------- SVG body ---------- */
.sil-edge { fill: var(--skin); stroke: var(--skin-edge); stroke-width: 2.4; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.sil-fill { fill: var(--skin); }
.landmark { fill: none; stroke: var(--skin-edge); stroke-width: 1; stroke-dasharray: 3 3; opacity: .7; vector-effect: non-scaling-stroke; }
.region { fill: transparent; stroke: var(--region-line); stroke-width: 1; vector-effect: non-scaling-stroke; cursor: pointer; outline: none; }
.region:hover, .region.hover { fill: color-mix(in srgb, var(--accent) 22%, transparent); }
.region:focus-visible { fill: color-mix(in srgb, var(--accent) 28%, transparent); }
.region-sel { fill: color-mix(in srgb, var(--accent) 30%, transparent); pointer-events: none; }
.region-sel-outline { fill: none; stroke: var(--accent); stroke-width: 2.2; vector-effect: non-scaling-stroke; pointer-events: none; }

.st { cursor: pointer; }
.st-muscle { fill: var(--muscle); fill-opacity: .82; stroke: color-mix(in srgb, var(--muscle) 45%, #000 55%); stroke-width: 1.1; vector-effect: non-scaling-stroke; }
.st-muscle.deep { fill: var(--muscle); fill-opacity: .18; stroke: var(--muscle); stroke-dasharray: 3 2; }
.st-muscle:hover { fill-opacity: 1; stroke: var(--text); }
.st-bone { fill: color-mix(in srgb, var(--bone) 70%, transparent); stroke: color-mix(in srgb, var(--bone) 70%, #000 30%); stroke-width: .8; vector-effect: non-scaling-stroke; }
.st-bone-line { fill: none; stroke: var(--bone); stroke-width: 1.6; vector-effect: non-scaling-stroke; }
.st-nerve { fill: none; stroke: var(--nerve); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.st-hit { fill: none; stroke: transparent; stroke-width: 12; vector-effect: non-scaling-stroke; cursor: pointer; }
.st.dimmed, .derm.dimmed { opacity: .22; }
.st-focus { fill: none; stroke: var(--accent); stroke-width: 2.6; vector-effect: non-scaling-stroke; pointer-events: none; }
.st-focus-line { fill: none; stroke: var(--accent); stroke-width: 4; stroke-linecap: round; vector-effect: non-scaling-stroke; pointer-events: none; }
.derm { stroke: rgba(0,0,0,.25); stroke-width: .6; vector-effect: non-scaling-stroke; cursor: pointer; opacity: .78; }
.derm:hover { opacity: 1; }
.lbl { fill: var(--text); paint-order: stroke; stroke: var(--bg); stroke-linejoin: round; pointer-events: none; font-weight: 600; }
.side-lbl { fill: var(--text-dim); }
.pad { stroke: rgba(0,0,0,.45); stroke-width: 1.2; vector-effect: non-scaling-stroke; }
.pad-ch1 { fill: var(--ch1); }
.pad-ch2 { fill: var(--ch2); }
.pad-num { fill: #000; font-weight: 700; pointer-events: none; }
.rel { fill: var(--release); stroke: #000; stroke-width: .8; vector-effect: non-scaling-stroke; }
.rel-num { fill: #fff; font-weight: 700; pointer-events: none; }
/* root map */
.rootmap-derm { opacity: .62; }
.rootmap-muscle { fill: var(--muscle); fill-opacity: .92; stroke: color-mix(in srgb, var(--muscle) 40%, #000 60%); stroke-width: 1.2; }
.rootmap-nerve { fill: none; stroke: var(--nerve); stroke-width: 3.4; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; filter: drop-shadow(0 0 2px rgba(0,0,0,.6)); }

/* plexus diagrams */
.px-edge { fill: none; stroke: var(--text-dim); stroke-width: 1.4; opacity: .55; vector-effect: non-scaling-stroke; }
.px-edge.on { stroke: var(--accent); opacity: 1; stroke-width: 2.6; }
.px-node rect { fill: var(--panel-2); stroke: var(--border); stroke-width: 1; vector-effect: non-scaling-stroke; }
.px-node.root rect { stroke-width: 2; }
.px-node.branch { cursor: pointer; }
.px-node.branch:hover rect { stroke: var(--text); }
.px-node.on rect { stroke: var(--accent); stroke-width: 2.6; fill: color-mix(in srgb, var(--accent) 14%, var(--panel-2)); }
.px-node text { fill: var(--text); font-weight: 600; pointer-events: none; }
.px-col { fill: var(--text-dim); text-transform: uppercase; letter-spacing: .06em; }

/* spine detail */
.sp-vert { fill: color-mix(in srgb, var(--bone) 55%, var(--skin)); stroke: color-mix(in srgb, var(--bone) 60%, #000 40%); stroke-width: 1; vector-effect: non-scaling-stroke; cursor: pointer; }
.sp-vert:hover, .sp-disc:hover { stroke: var(--text); }
.sp-vert.on, .sp-disc.on { stroke: var(--accent); stroke-width: 2.6; }
.sp-disc { fill: #7fb6cc; fill-opacity: .8; stroke: #3f6f82; stroke-width: .8; vector-effect: non-scaling-stroke; cursor: pointer; }
.sp-spinous { stroke: color-mix(in srgb, var(--bone) 40%, #000 60%); stroke-width: 1.4; vector-effect: non-scaling-stroke; pointer-events: none; }
.sp-cord { fill: var(--nerve); fill-opacity: .38; stroke: var(--nerve); stroke-width: .8; vector-effect: non-scaling-stroke; pointer-events: none; }
.sp-filum { stroke: var(--nerve); stroke-width: .8; stroke-dasharray: 2 2; vector-effect: non-scaling-stroke; }
.sp-root { fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; pointer-events: none; }
.sp-root.on { stroke-width: 4.5; }
.sp-root.dimmed { opacity: .35; }
.sp-vlabel { fill: #0d1417; font-weight: 700; pointer-events: none; }
.sp-rlabel { font-weight: 700; cursor: pointer; paint-order: stroke; stroke: var(--bg); stroke-width: 2px; }
.sp-rlabel.on { text-decoration: underline; }
.sp-bracket { fill: none; stroke: var(--text-dim); stroke-width: 1; vector-effect: non-scaling-stroke; }
.sp-plexus, .sp-note { fill: var(--text-dim); }
.st-nerve.minor { stroke-width: 1.3; }
.st-nerve.deep { stroke-dasharray: 4 3; }
.tooltip {
  position: fixed; z-index: 50; pointer-events: none; padding: 5px 9px; border-radius: 7px;
  background: var(--panel); border: 1px solid var(--border); font-size: .8rem; box-shadow: 0 6px 18px rgba(0,0,0,.3);
}
.tooltip[hidden] { display: none; }
.tooltip small { color: var(--text-dim); display: block; }

/* ---------- panel ---------- */
.panel { padding: 18px 22px 60px; min-width: 0; }
.panel h1 { font-size: 1.45rem; margin: 0; line-height: 1.2; }
.panel h2 { font-size: .74rem; text-transform: uppercase; letter-spacing: .07em; color: var(--text-dim); margin: 26px 0 10px; }
.panel h3 { font-size: .98rem; margin: 0 0 6px; }
.panel p { margin: 6px 0; }
.dim { color: var(--text-dim); }
.small { font-size: .82rem; }
.area-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.chip {
  border: 1px solid var(--border); background: var(--panel-2); border-radius: 999px; padding: 5px 11px;
  font-size: .82rem; cursor: pointer; text-decoration: none; color: var(--text);
}
.chip:hover { border-color: var(--accent); }
.chip.static { cursor: default; }
.pill { font-size: .72rem; border-radius: 999px; padding: 2px 8px; background: var(--panel-2); border: 1px solid var(--border); color: var(--text-dim); white-space: nowrap; }
.pill.ok { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.pill.no { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 45%, var(--border)); }

.banner { border-radius: var(--radius); padding: 11px 14px; margin: 14px 0 0; font-size: .86rem; border: 1px solid var(--border); background: var(--panel-2); }
.banner.urgent { border-left: 4px solid var(--danger); }
.banner.info { border-left: 4px solid var(--warn); }
.banner ul { margin: 6px 0 0; padding-left: 18px; }

.st-list { display: grid; gap: 6px; }
.st-row { border: 1px solid var(--border); border-radius: 9px; background: var(--panel); }
.st-row > button {
  display: grid; grid-template-columns: 14px 1fr auto; gap: 10px; align-items: start; width: 100%;
  text-align: left; border: 0; background: none; padding: 9px 11px; cursor: pointer;
}
.st-row .kind { width: 12px; height: 12px; border-radius: 3px; margin-top: 4px; }
.kind-muscles { background: var(--muscle); }
.kind-nerves { background: var(--nerve); border-radius: 50% !important; }
.kind-bones { background: var(--bone); }
.kind-dermatomes { background: linear-gradient(135deg, #5b8def, #58c28a, #f0a35e, #b67be0); }
.st-row .nm { font-weight: 600; }
.st-row .fn { display: block; font-size: .83rem; color: var(--text-dim); font-weight: 400; }
.st-row .chev { color: var(--text-dim); transition: transform .15s; }
.st-row.open .chev { transform: rotate(90deg); }
.st-row .more { padding: 0 12px 11px 35px; font-size: .86rem; }
.st-row.open { border-color: var(--accent); }
.derm-chips .chip { font-variant-numeric: tabular-nums; }

.topics { display: grid; gap: 8px; }
.topic {
  display: block; width: 100%; text-align: left; border: 1px solid var(--border); background: var(--panel);
  border-radius: 10px; padding: 10px 12px; cursor: pointer;
}
.topic[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.topic .lay { display: block; }
.topic .cn { display: block; font-size: .8rem; color: var(--text-dim); margin-top: 3px; }

.summary-bar { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.summary-bar a { text-decoration: none; }

.card { border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); padding: 12px 14px; margin-bottom: 10px; }
.card h3 { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.card .dose { display: inline-block; margin-top: 8px; font-size: .74rem; color: var(--accent); background: var(--panel-2); border: 1px solid var(--border); padding: 2px 9px; border-radius: 999px; }
.card .src { display: block; margin-top: 8px; font-size: .78rem; }
.card .caution { font-size: .8rem; color: var(--warn); margin-top: 6px; }
.tag { font-size: .66rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-dim); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; white-space: nowrap; }
.section, .nc { scroll-margin-top: calc(var(--header-h) + 10px); }
.tens-box { border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; background: var(--panel); }
.tens-status { font-weight: 650; }
.pad-key { padding-left: 20px; margin: 8px 0; font-size: .88rem; }
.pad-key li { margin: 3px 0; }
.btn {
  border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); font-weight: 600;
  border-radius: 8px; padding: 7px 12px; cursor: pointer; font-size: .85rem;
}
.btn.ghost { background: transparent; color: var(--accent); }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }
details { margin: 10px 0; }
details > summary { cursor: pointer; font-weight: 600; font-size: .9rem; }
details ul { margin: 8px 0 0; padding-left: 20px; }
.flags { display: grid; gap: 8px; }
.flag-group { border-radius: 9px; padding: 9px 12px; border: 1px solid var(--border); background: var(--panel); }
.flag-group h3 { font-size: .85rem; }
.flag-group.emergency { border-left: 4px solid var(--danger); }
.flag-group.urgent { border-left: 4px solid var(--warn); }
.flag-group.soon { border-left: 4px solid var(--text-dim); }
.flag-group ul { margin: 4px 0 0; padding-left: 18px; font-size: .86rem; }
.muted-line { font-size: .82rem; color: var(--text-dim); font-style: italic; margin-top: 10px; }
.sources-list { padding-left: 18px; font-size: .82rem; }
.sources-list li { margin: 3px 0; }
.home-hero h1 { font-size: 1.6rem; }
.layer-help { font-size: .88rem; }
.disclaimer { font-size: .78rem; color: var(--text-dim); border-top: 1px solid var(--border); margin-top: 28px; padding-top: 12px; }

dialog.browse {
  border: 1px solid var(--border); border-radius: 14px; background: var(--panel); color: var(--text);
  width: min(760px, 94vw); max-height: 86vh; padding: 0;
}
dialog.browse::backdrop { background: rgba(0,0,0,.5); }
.browse-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--panel); }
.browse-body { padding: 8px 18px 20px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.browse-body h2 { font-size: .74rem; text-transform: uppercase; letter-spacing: .07em; color: var(--text-dim); margin: 14px 0 6px; }
.browse-body ul { list-style: none; margin: 0; padding: 0; }
.browse-body li button { border: 0; background: none; padding: 5px 0; cursor: pointer; text-align: left; display: flex; gap: 8px; align-items: baseline; }
.browse-body li button:hover { color: var(--accent); }

@media (max-width: 860px) {
  :root { --header-h: 56px; }
  .topbar { gap: 8px; padding: 0 10px; }
  .brand .label { display: none; }
  .app { grid-template-columns: 1fr; }
  .stage { position: relative; top: auto; height: 64vh; border-right: 0; border-bottom: 1px solid var(--border); }
  body.has-area .stage { position: sticky; top: var(--header-h); height: clamp(200px, 46vh, 460px); z-index: 5; background: var(--bg); }
  body.has-area .section, body.has-area .nc { scroll-margin-top: calc(var(--header-h) + clamp(200px, 46vh, 460px) + 10px); }
  .stage-bar { padding: 6px 8px; gap: 6px; overflow-x: auto; flex-wrap: nowrap; }
  .seg { flex-wrap: nowrap; }
  .seg button { padding: 5px 8px; }
  .panel { padding: 14px 14px 60px; }
  .browse-body { grid-template-columns: 1fr; }
  .stage-foot { padding: 2px 10px 6px; }
}
@media (max-width: 860px) and (max-height: 520px) {
  body.has-area .stage { position: relative; top: auto; height: 80vh; }
  body.has-area .section, body.has-area .nc { scroll-margin-top: calc(var(--header-h) + 10px); }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}
/* myotome list on the spine root card */
.myo { margin: 8px 0; }
.myo summary { cursor: pointer; font-weight: 600; }
.myo-list { margin: 8px 0; padding-left: 18px; display: grid; gap: 7px; }
.myo-list li { line-height: 1.35; }
.chip.mini { padding: 0 7px; font-size: .72rem; vertical-align: 1px; }
/* nerve problems (numbness, tingling, nerve pain) */
.nc { padding: 0; }
.nc > summary { cursor: pointer; padding: 11px 13px; display: grid; gap: 2px; list-style: none; }
.nc > summary::-webkit-details-marker { display: none; }
.nc > summary .nm { font-weight: 600; }
.nc > summary::after { content: '›'; position: absolute; right: 14px; top: 11px; color: var(--text-dim); transition: transform .15s; }
.nc { position: relative; }
.nc[open] > summary::after { transform: rotate(90deg); }
.nc[open] { border-color: var(--accent); }
.nc > :not(summary) { margin-left: 13px; margin-right: 13px; }
.nc > :last-child { margin-bottom: 12px; }
.nc.focus { box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 45%, transparent); }
.nc-group { margin: 14px 13px 6px; font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; color: var(--text-dim); }
.nerve-item { margin: 0 13px 8px; }
.nc-seek ul { list-style: none; padding: 0; display: grid; gap: 6px; margin: 6px 0 10px; }
.nerve-entry { margin-top: 14px; scroll-margin-top: calc(var(--header-h) + 10px); }
/* plexus diagram: keep it legible on phones (scroll sideways), keyboard focus */
.px-scroll { width: 100%; height: 100%; overflow: auto; -webkit-overflow-scrolling: touch; }
.px-scroll > svg { display: block; width: 100%; height: auto; min-height: 100%; }
.px-node:focus { outline: none; }
.px-node:focus-visible rect { stroke: var(--accent); stroke-width: 2.4; }
/* root map: links a source marks as inferred or variable */
.rootmap-muscle.hedged { fill: var(--muscle); fill-opacity: .35; stroke: var(--muscle); stroke-dasharray: 3 2; }
.hedged-swatch { background: color-mix(in srgb, var(--muscle) 35%, transparent); outline: 1px dashed var(--muscle); }
/* nerve cards: condition name is a heading inside the summary; option titles */
.nc > summary h3.nm { font-size: .98rem; margin: 0; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; padding-right: 18px; }
.nerve-item h5 { margin: 0 0 6px; font-size: .93rem; }
.chip.mini { min-height: 24px; }
.nc-more { margin: 10px 13px 6px; }
.nc-more > summary { cursor: pointer; font-size: .86rem; color: var(--accent); }
.nc-more .nerve-item { margin: 0 0 8px; }
.nc-more .nc-group { margin-left: 0; }
/* further reading: earlier sources, clearly separate from the sources the text is based on */
.further { margin: 6px 0 0; line-height: 1.45; }
.further a { color: var(--text-dim); text-decoration: underline dotted; }
.further-h { margin: 16px 0 4px; font-size: .95rem; }
.further-list a { color: var(--text-dim); }
.credits { margin-top: 10px; }
.credits a, .about a { color: var(--text-dim); }
.about { margin: 14px 0 6px; }
.about summary { cursor: pointer; font-size: .9rem; }
/* brain view */
.br-outline { fill: color-mix(in srgb, var(--panel) 80%, var(--text) 4%); stroke: var(--border); stroke-width: 1; vector-effect: non-scaling-stroke; }
.br { fill: var(--c); fill-opacity: .5; stroke: color-mix(in srgb, var(--c) 55%, #000 45%); stroke-width: .9; vector-effect: non-scaling-stroke; cursor: pointer; transition: fill-opacity .12s; }
.br-lobe { fill-opacity: .3; }
.br.deep { fill-opacity: .12; stroke: var(--c); stroke-dasharray: 3 2; }
.br:hover { fill-opacity: .75; }
.br.on { fill-opacity: .9; stroke: var(--accent); stroke-width: 2.2; }
.br.dim { opacity: .5; }
.br:focus { outline: none; }
.br:focus-visible { stroke: var(--accent); stroke-width: 2.4; }
.br-label { font-size: 8.5px; fill: var(--text); paint-order: stroke; stroke: var(--bg); stroke-width: 2.6px; stroke-linejoin: round; pointer-events: none; font-weight: 600; }
.br-label.small { font-size: 6.5px; font-weight: 500; }
.br-label.dim { fill: var(--text-dim); }
.br-label.sel { font-size: 9px; fill: var(--accent); }
.pain-edge { fill: none; stroke: var(--border); stroke-width: 1.6; vector-effect: non-scaling-stroke; }
.pain-edge.up { stroke: color-mix(in srgb, var(--accent) 55%, var(--border)); }
.pain-edge.gate { stroke: hsl(140,45%,50%); stroke-dasharray: 2 3; }
.pain-edge.down { stroke: hsl(210,65%,62%); stroke-dasharray: 6 4; }
.pain-edge.on { stroke-width: 3; opacity: 1; }
.pain-node.near rect { stroke: var(--accent); }
.bt { padding: 0; position: relative; }
.bt > summary, .cranial > summary { cursor: pointer; padding: 11px 13px; display: grid; gap: 2px; list-style: none; }
.bt > summary::-webkit-details-marker, .cranial > summary::-webkit-details-marker { display: none; }
.bt > summary h3.nm, .cranial > summary h3.nm { font-size: .98rem; margin: 0; }
.bt > :not(summary) { margin-left: 13px; margin-right: 13px; }
.bt > :last-child { margin-bottom: 12px; }
.bt[open] { border-color: var(--accent); }
.bt, .cranial { scroll-margin-top: calc(var(--header-h) + 10px); }
.cranial { padding: 0; margin-top: 14px; }
.cn-list { list-style: none; padding: 0 13px 12px; margin: 0; display: grid; gap: 8px; }
.linkish { background: none; border: 0; padding: 0; color: var(--text); cursor: pointer; font: inherit; text-align: left; }
.linkish:hover { color: var(--accent); }
.brain-card .tag { font-weight: 500; }
.brain-entry { margin-top: 14px; border-left: 4px solid hsl(210,60%,62%); }
.brain-entry .row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
a.icon-btn { color: var(--text); text-decoration: none; display: inline-flex; align-items: center; }
a.icon-btn[aria-current="page"] { border-color: var(--accent); color: var(--accent); }