/* V35 — a quiet, luminous gallery around real anatomical surfaces. */
.brainAtlas{--b-bg:#030d16;--b-panel:#0b202b;--b-accent:#b4f1e5;--b-muted:#b9cbd4;background:radial-gradient(ellipse at 8% 15%,#0b2630aa,transparent 40%),#030d16}
.brainWrap{width:min(1536px,calc(100% - 80px))}
.brainMast{position:relative;isolation:isolate;padding:38px 0 42px;overflow:hidden}
.brainMast::before{content:"";position:absolute;z-index:-1;inset:-30px -40px -30px 25%;background:linear-gradient(90deg,#030d16,transparent 60%),url('/neural-atmosphere-v35.webp') right 52%/cover no-repeat;opacity:.24;pointer-events:none;mask-image:linear-gradient(180deg,transparent,#000 25%,#000 75%,transparent)}
.brainMeta{font-size:10px;letter-spacing:.14em;color:#aec9d0}
.brainMast__row{margin-top:30px;gap:50px}
.brainMast h1{font-size:clamp(56px,6.5vw,102px);letter-spacing:-.065em;line-height:1;max-width:720px}
.brainMast h1 em{color:#bcf4e9}
.brainMast__intro{font-size:16px;max-width:350px;color:#c1d5dc!important}
.brainMast__intro small{color:#adbeca;font-size:12px}
.brainControls{background:#0d202a88;border:1px solid #365561;border-radius:16px;padding:0 20px;box-shadow:inset 0 1px #defcff0b}
.brainModes{gap:28px}
.brainMode{padding:19px 4px;font-size:14px}
.brainMode[aria-pressed="true"]::after{inset:auto 4px 8px;border-radius:2px;background:#b4f1e5}
.brainExplorer{grid-template-columns:minmax(0,1fr) minmax(310px,360px);gap:24px 32px;padding-top:22px}
.brainTopics{grid-column:1/-1;display:flex;align-items:center;gap:24px;padding:0 0 4px;min-width:0}
.brainTopics>label{display:block;flex:0 0 auto;margin:0;font-size:10px}
.brainTopicSelect{display:none}
.brainTopicList{display:flex;flex-wrap:wrap;gap:4px 8px;margin:0}
.brainTopic{padding:10px 12px;border:1px solid transparent;border-radius:10px;min-height:44px;font-size:12px;color:#c0d3dd}
.brainTopic[aria-pressed="true"]{border-color:#56818a;background:#193c45;color:#c6fff2}
.brainTopic[aria-pressed="true"]::before{display:none}
.brainTopic span{color:#a2c0cb}
.brainStage[data-focus-ready="true"]{border:1px solid #35515d;border-radius:24px;padding:24px;overflow:hidden;background:linear-gradient(135deg,#112b3577,#03121bd9 60%);box-shadow:inset 0 1px #ccffff12,0 36px 80px #0003}
.brainStage[data-focus-ready="true"]>.brainStage__canvas{opacity:.2}
.brainStage[data-focus-ready="true"]>.brainStage__symbol{display:none}
.bfWorkbench{gap:15px;--bf-edge:#496672;--bf-muted:#bfd4dc;--bf-bright:#c6f7ec}
.bfHeader{padding:0 0 4px;gap:20px}
.bfHeader .brainCaption{font-size:9px;letter-spacing:.16em;margin-bottom:8px}
.bfHeader h2{font-size:clamp(24px,2.2vw,34px);line-height:1.15;color:#ecfafc}
.bfHeader [data-bf-expand]{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:#162f39;border-color:#52707b;border-radius:30px;font-size:12px;min-width:134px;max-width:none}
.bfAppearance{display:flex;flex-wrap:wrap;align-items:center;gap:7px;padding:10px 0 2px}
.bfAppearanceLabel{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:#b1cbd5;margin-right:auto}
.bfAppearance button{display:inline-flex;gap:8px;align-items:center;font-size:11px;min-height:44px;padding:8px 12px;border-radius:30px;border-color:#49616b;background:#0a1c27}
.bfAppearance button[aria-pressed="true"]{border-color:#8bc5c6;background:#173c43;color:#e2fff6;box-shadow:inset 0 1px #d4fffc18,0 0 24px #7dd3cd0c}
.bfAppearance i{width:12px;height:12px;border-radius:50%;background:radial-gradient(circle at 30% 20%,#e6ffff,#4bc9c6 55%,#124956);box-shadow:0 0 0 1px #d4ffff40}
.bfAppearance [data-bf-appearance="pearl"] i{background:radial-gradient(circle at 30% 20%,#fff8e2,#c2d3d8 55%,#4a6173)}
.bfAppearance [data-bf-appearance="atlas"] i{background:conic-gradient(#96e6d3,#ebb879,#b9b1ff,#85cbf5,#96e6d3)}
.bfViewport{border-color:#486773;border-radius:18px;aspect-ratio:1.45;min-height:320px;background:radial-gradient(ellipse at 51% 38%,#1a3a49 0%,#091d2a 48%,#03101c 82%);box-shadow:inset 0 1px #daffff1a,0 15px 45px #0004;transition:background-color .25s ease}
.bfViewport[data-appearance="pearl"]{background:radial-gradient(ellipse at 50% 37%,#283640,#0c1b29 50%,#030e19 82%)}
.bfViewport[data-appearance="atlas"]{background:radial-gradient(ellipse at 50% 37%,#182a3c,#081925 50%,#030e19 82%)}
.bfViewport::after{inset:12px;border-radius:10px;border-color:#aedbe70c}
.bfViewport::before{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;background-image:radial-gradient(#a6dcdb33 .6px,transparent .7px);background-size:30px 30px;mask-image:radial-gradient(ellipse,#0000 25%,#000 100%);opacity:.45}
.bfViewportBadge{border-color:#6ba4aa44;background:#071c28ed;border-radius:10px;padding:10px 13px;top:16px;left:16px;font-size:12px;box-shadow:0 8px 24px #0002}
.bfViewportBadge small{font-size:10px;color:#aecbd7}
.bfMapNote{font-size:10px;bottom:15px;inset-inline:20px;color:#c5e0e6!important}
.bfToolbar{padding:12px;border:1px solid #385560;border-radius:14px;background:#071a24c9;gap:8px}
.bfToolbar button,.bfCameraRow select{border-radius:9px;background:#102933;border-color:#4a6873}
.bfCameraRow{padding-bottom:8px;margin-bottom:4px;border-bottom:1px solid #31505c}
.bfCameraRow select{min-width:125px;font-size:12px}
.bfCameraRow [data-bf-turn][aria-pressed="true"]{background:#c1f3e4;color:#113834;border-color:#c1f3e4}
.bfHint{font-size:12px;line-height:1.7;color:#b6cdd6!important;padding:0 3px}
.bfBrowse{background:#061721;border-color:#385560;border-radius:11px;align-self:end}
.bfBrowse button{font-size:12px}
.bfRegionChooser label{font-size:11px}
.bfRegionChooser select{border-radius:11px;background:#102833;min-height:52px;font-size:13px}
.bfRelated{gap:8px}
.bfRelated button{border-radius:10px;background:#10242e;border-color:#395862;flex:1 0 auto;font-size:12px;padding:11px 13px}
.bfRelated button[aria-pressed="true"]{border-color:#85c3c2;background:#1a3e48}
.bfRegionSwatch{width:9px;height:9px;flex-basis:9px}
.bfDetail{border-radius:16px;background:linear-gradient(120deg,#15333ed9,#091e2bd9);border-color:#385862;padding:25px}
.bfDetail h3{font-size:28px;line-height:1.2}
.bfDetail .bfDescription{font-size:15px}
.bfDetail .bfDetailNote{font-size:12px}
.bfSources a{font-size:12px}
.brainLessons{position:sticky;top:118px}
.brainLesson{border-radius:20px;padding:28px 25px;border-color:#3e5a68;background:linear-gradient(160deg,#183745bb,#071c28);box-shadow:inset 0 1px #cafff014,0 18px 60px #0002;margin-bottom:0}
.brainLesson__category{padding:7px 10px;border:1px solid #527783;border-radius:30px;display:inline-flex;font-size:9px;letter-spacing:.1em;margin-bottom:22px}
.brainLesson h2{font-size:36px;letter-spacing:-.045em}
.brainLesson__summary{font-size:15px;color:#d5e7ef!important;line-height:1.8}
.brainLesson__section p{font-size:14px;line-height:1.75}
.brainLesson__note{font-size:12px!important;line-height:1.75;padding-left:14px;border-color:#90cfc6}
.brainLesson__sources{border-color:#3b5864;padding-top:18px;margin-top:24px}
.brainLesson__sources a{font-size:12px;min-height:44px;display:inline-flex;align-items:center;color:#bae9e5}
.brainPagination{grid-column:2;font-size:12px}
.brainExplorer__note{color:#b4cad4}
.brainSection{border-color:#36505d}
.brainSection__heading h2,.brainCare h2{letter-spacing:-.045em}
.brainSynapse__diagram{border-radius:22px;background:radial-gradient(ellipse at 50% 40%,#193c47,#0a1e2b 70%);border-color:#3d6370;box-shadow:inset 0 1px #d2ffff11}
.brainEvidence{gap:24px}
.brainEvidence article{padding:25px;border:1px solid #375461;border-radius:18px;background:linear-gradient(145deg,#14313a99,#0b1e2b)}
.brainSafety{border-radius:18px;background:#112b38;border-color:#55747f}
.bfDialog{background:radial-gradient(ellipse at 10% 5%,#21465366,transparent 65%),#061520;border-color:#59828e;border-radius:22px}
.bfDialog .brainStage[data-focus-ready="true"]{padding:0;border:0;border-radius:0;background:none;box-shadow:none}
.bfDialogBar{background:#0b202b;border-color:#436470}
.bfDialog .bfViewport{border-radius:18px}
@media(min-width:1100px){
 .bfDialog .bfWorkbench{--bf-view-height:clamp(320px,calc(100dvh - 402px),650px);grid-template-areas:"header topic" "appearance inspector" "viewport inspector" "toolbar inspector" "hint inspector";grid-template-rows:auto auto var(--bf-view-height) auto auto;gap:12px 24px}
 .bfDialog .bfAppearance{grid-area:appearance;padding:0}
 .bfDialog .bfInspector{max-height:calc(var(--bf-view-height) + 258px);padding-right:12px}
 .bfDialog .bfViewport{max-height:var(--bf-view-height);height:var(--bf-view-height)}
 .bfDialog .bfRegionChooser select{font-size:14px}
}
@media(max-width:1199px){
 .brainWrap{width:calc(100% - 48px)}
 .brainExplorer{grid-template-columns:minmax(0,1fr) minmax(280px,.72fr);gap:22px}
 .brainTopics>label{max-width:none;white-space:nowrap}
 .brainTopicSelect{display:block;max-width:420px;font-size:16px;border-radius:10px;background:#112b38}
 .brainTopicList{display:none}
 .brainStage[data-focus-ready="true"]{padding:18px;border-radius:20px}
 .bfHeader{align-items:center;gap:12px;flex-wrap:wrap}
 .bfHeader button{font-size:11px}
 .bfHeader h2{font-size:26px}
 .bfAppearanceLabel{flex-basis:100%}
 .bfAppearance{gap:6px}
 .bfAppearance button{font-size:11px;padding-inline:10px}
 .bfViewport{min-height:300px}
 .brainLesson{padding:24px 21px}
 .brainLesson h2{font-size:31px}
 .brainMast__intro{max-width:300px;font-size:15px}
}
@media(max-width:1099px){
 .bfDialog .bfAppearance{order:2}
 .bfDialog .bfViewport{order:3}
 .bfDialog .bfToolbar{order:4}
 .bfDialog .bfHint{order:5}
 .bfDialog .bfBrowse{order:6}
 .bfDialog .bfRegionChooser{order:7}
 .bfDialog .bfRelated{order:8}
 .bfDialog .bfSubregions{order:9}
 .bfDialog .bfDetail{order:10}
 .bfDialog .bfAppearanceLabel{flex-basis:auto}
}
@media(max-width:850px){
 .brainExplorer{grid-template-columns:1fr}
 .brainTopics{grid-column:auto}
 .brainLessons{position:static}
 .brainPagination{grid-column:auto}
 .brainStage[data-focus-ready="true"]{padding:22px}
 .bfAppearanceLabel{flex-basis:auto}
 .bfHeader{flex-wrap:nowrap}
 .bfViewport{max-height:580px;aspect-ratio:1.5}
 .brainLesson h2{font-size:36px}
 .brainLesson__summary,.brainLesson__section p{font-size:16px}
 .brainMast__row{display:block}
 .brainMast__intro{max-width:600px;margin-top:24px}
 .brainControls{padding:0 12px}
 .brainControls__link{display:none}
 .brainModes{width:100%;justify-content:space-between;gap:12px}
}
@media(max-width:600px){
 .brainWrap{width:calc(100% - 32px)}
 .brainMast{padding:24px 0 30px}
 .brainMeta{font-size:9px;letter-spacing:.06em}
 .brainMeta__brand{gap:8px}
 .brainMast::before{left:0;opacity:.18}
 .brainMast__row{margin-top:26px}
 .brainMast h1{font-size:clamp(52px,11vw,70px);max-width:350px}
 .brainMast__intro{font-size:16px;margin-top:24px}
 .brainMode{font-size:12px;gap:7px;padding:17px 0}
 .brainMode span{font-size:9px}
 .brainModes{gap:8px}
 .brainTopics{gap:14px}
 .brainTopics>label{max-width:68px;white-space:normal;line-height:1.5;font-size:9px}
 .brainTopicSelect{font-size:16px}
 .brainStage[data-focus-ready="true"]{padding:15px;border-radius:18px}
 .bfHeader{align-items:flex-start;gap:12px}
 .bfHeader .brainCaption{font-size:8px;letter-spacing:.1em}
 .bfHeader h2{font-size:24px;max-width:200px}
 .bfHeader [data-bf-expand]{min-width:0;max-width:104px;border-radius:12px;padding:9px 11px;font-size:10px}
 .bfHeader [data-bf-expand] svg{flex:0 0 14px}
 .bfAppearance{gap:6px;padding-top:0}
 .bfAppearanceLabel{flex-basis:100%;font-size:9px;margin-bottom:2px}
 .bfAppearance button{flex:1 1 auto;justify-content:center;font-size:11px;padding-inline:9px}
 .bfViewport{aspect-ratio:1;min-height:280px;max-height:430px;border-radius:14px}
 .bfViewportBadge{top:12px;left:12px;padding:8px 10px;max-width:calc(100% - 24px);font-size:11px}
 .bfViewportBadge small{font-size:9px}
 .bfMapNote{bottom:12px;inset-inline:13px;font-size:9px;gap:10px}
 .bfToolbar{padding:9px;gap:6px}
 .bfCameraRow{gap:6px}
 .bfCameraRow select{flex:1 1 100%;font-size:16px}
 .bfCameraRow [data-bf-turn]{flex:1}
 .bfZoom{flex-basis:80px}
 .bfToolbar .bfIsolate{flex:1 0 auto}
 .bfHint{font-size:12px}
 .bfRegionChooser select{font-size:16px}
 .bfRelated button{font-size:12px;padding:10px}
 .bfDetail{padding:21px}
 .bfDetail h3{font-size:27px}
 .bfDetail .bfDescription,.bfDetail .bfConnection{font-size:16px}
 .bfDetail .bfDetailNote{font-size:12px}
 .bfDialog .bfAppearanceLabel{flex-basis:100%}
 .bfDialog .bfViewport{min-height:280px;max-height:430px}
 .bfDialog .bfExpandedTopic select{font-size:16px}
 .brainLesson{padding:25px;border-radius:18px}
 .brainSection{padding:48px 0}
 .brainEvidence article{padding:24px}
}
@media(prefers-reduced-motion:reduce){.brainAtlas *{animation:none!important;transition:none!important}}
@media(forced-colors:active){.brainMast::before,.bfViewport::before{display:none}.brainControls,.brainStage[data-focus-ready="true"],.brainLesson,.brainEvidence article,.bfAppearance button,.bfToolbar,.bfDetail{background:Canvas;border-color:ButtonBorder;color:CanvasText}.bfAppearance button[aria-pressed="true"]{outline:2px solid Highlight}.bfAppearance i{forced-color-adjust:none}}
@media print{.brainMast::before{display:none}.brainLessons{position:static}.brainEvidence article{background:white;border-color:#777}.brainLesson{border-color:#777;background:white}}

/* Revision 3: keep area selection and the model in the same working view. */
.bfRegionNav{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;gap:7px;align-items:center;margin-top:7px}
.bfRegionNav select{margin:0;min-height:46px;padding-left:10px}
.bfRegionNav button{padding:8px;font-size:20px;border-radius:11px;min-height:46px}
.bfWorkbench>.bfRegionChooser{grid-column:1/-1}
.bfWorkbench>.bfBrowse{grid-column:1/-1}
.bfViewport{min-height:280px;max-height:clamp(280px,48dvh,480px);aspect-ratio:1.55}
.bfDialog .bfViewport{max-height:clamp(260px,44dvh,480px)}
@media(min-width:1100px){
 .brainExplorer:has(.brainStage[data-focus-ready="true"]){grid-template-columns:minmax(0,1fr)}
 .brainExplorer>.brainStage[data-focus-ready="true"],.brainExplorer:has(.brainStage[data-focus-ready="true"])>.brainLessons,.brainExplorer:has(.brainStage[data-focus-ready="true"])>.brainPagination{grid-column:1/-1}
 .brainExplorer:has(.brainStage[data-focus-ready="true"])>.brainLessons{position:static;width:min(960px,100%);justify-self:center;min-height:0}
 .brainExplorer:has(.brainStage[data-focus-ready="true"])>.brainPagination{width:min(960px,100%);justify-self:center}
 .brainExplorer:has(.brainStage[data-focus-ready="true"]) .brainLesson{padding:30px 38px}
 .brainExplorer:has(.brainStage[data-focus-ready="true"]) .brainLesson__section p{max-width:78ch}
 .bfWorkbench,.bfDialog .bfWorkbench{--bf-view-height:clamp(280px,calc(100dvh - 500px),480px);grid-template-columns:minmax(0,1fr) 340px;grid-template-areas:"header header" "appearance inspector" "viewport inspector" "toolbar inspector" "hint inspector";grid-template-rows:auto auto var(--bf-view-height) auto auto;gap:12px 24px;align-items:start}
 .bfHeader{grid-area:header}
 .bfAppearance,.bfDialog .bfAppearance{grid-area:appearance;padding:0}
 .bfViewport,.bfDialog .bfViewport{grid-area:viewport;min-height:0;height:var(--bf-view-height);max-height:var(--bf-view-height);aspect-ratio:auto}
 .bfToolbar{grid-area:toolbar}
 .bfHint{grid-area:hint}
 .bfInspector,.bfDialog .bfInspector{grid-area:inspector;align-self:stretch;display:grid;align-content:start;gap:14px;min-height:0;height:100%;max-height:calc(var(--bf-view-height) + 260px);overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#547f88 #081c28;scrollbar-gutter:stable;padding:0 12px 5px 0;margin:0}
 .bfInspector>.bfRegionChooser{position:sticky;top:0;z-index:3;background:#0b222d;padding:12px;border:1px solid #42616c;border-radius:13px;box-shadow:0 10px 22px #02111be0}
 .bfInspector .bfRelated{gap:7px}
 .bfInspector .bfRelated button{flex:1 1 calc(50% - 7px);padding:10px;font-size:12px}
 .bfInspector .bfDetail{padding:21px}
 .bfDialog .bfWorkbench{grid-template-areas:"header topic" "appearance inspector" "viewport inspector" "toolbar inspector" "hint inspector";--bf-view-height:clamp(260px,calc(100dvh - 520px),500px)}
}
@media(max-width:1099px){
 .bfDialog .bfRegionChooser{order:3}
 .bfDialog .bfViewport{order:4}
 .bfDialog .bfToolbar{order:5}
 .bfDialog .bfHint{order:6}
 .bfDialog .bfBrowse{order:7}
 .bfDialog .bfRelated{order:8}
 .bfDialog .bfSubregions{order:9}
 .bfDialog .bfDetail{order:10}
}
@media(min-width:851px) and (max-width:1099px){
 .brainExplorer{grid-template-columns:1fr}
 .brainLessons{position:static}
 .brainPagination{grid-column:1}
}
@media(max-width:600px){
 .bfViewport,.bfDialog .bfViewport{min-height:240px;max-height:min(360px,42dvh);aspect-ratio:1.12}
 .bfRegionChooser{padding:11px;border:1px solid #42616c;border-radius:13px;background:#0d2631}
 .bfRegionChooser label{font-size:12px;color:#c5e5e9}
 .bfRegionNav{grid-template-columns:40px minmax(0,1fr) 40px;gap:5px}
 .bfRegionNav button{min-height:46px}
 .bfRegionNav select{padding-left:7px;padding-right:24px;font-size:16px}
}
@media(forced-colors:active){.bfInspector>.bfRegionChooser,.bfRegionChooser{background:Canvas;border-color:ButtonBorder;box-shadow:none}.bfRegionChooser label{color:CanvasText}}