/* Brain-only layout; Cellular View keeps its own workspace. */
.brain-layout{--panel-width:470px;max-width:2200px;grid-template-columns:220px minmax(0,1fr);align-items:start}
.brain-layout [hidden]{display:none!important}
.brain-layout .navigator{grid-column:1;grid-row:1 / span 3;position:sticky;top:8px;max-height:calc(100dvh - 16px);padding:20px 12px}
.brain-layout #structures{display:block;overflow:auto;min-height:100px}
.brain-layout .structure{min-width:0;font-size:13px;padding:8px 6px;margin:2px 0}
.brain-layout .anatomy-group{padding:7px 0;border-top:1px solid #293d50}
.brain-layout .anatomy-group>summary{font-size:12px;color:#b5cbdc;padding:5px 0}
.brain-layout summary>span{float:right;color:#8fa6bc;font-size:11px;margin-right:4px}
.brain-layout .subregion-tree{padding:3px 0 5px 14px;border:0}
.brain-layout .subregion-tree>summary{font-size:12px;color:#85e1d3}
.brain-layout #hyp-subnav{padding:4px 0;max-height:none;overflow:visible;border:0}
.brain-layout #hyp-subnav .structure{border-left:2px solid #3e6972;border-radius:0 6px 6px 0;font-size:12px}
.brain-layout #hyp-subnav .structure[aria-pressed=true]{border-color:#65e0d1;background:#24554d}
.brain-layout .scope details{padding:8px 0}.brain-layout .scope p{font-size:12px}
.brain-layout .workspace{grid-column:2;grid-row:1;min-width:0}
#anatomy-breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:10px 16px;min-height:46px;background:#101e30;font-size:13px;border-bottom:1px solid var(--line)}
#anatomy-breadcrumb button{font-size:12px;padding:5px 9px}
.brain-layout #viewport{height:clamp(420px,58dvh,720px)}
.brain-layout .toolbar{padding:10px 14px;gap:8px}
.brain-layout #selection-summary{padding:12px 18px}
.brain-layout #selection-summary>p{font-size:13px;margin-bottom:5px}
.brain-layout #selection-summary>a{font-size:13px}
.learning-panel{grid-column:2;grid-row:2;min-width:0;border:1px solid #35495d;background:#101b2c;margin:0 12px 24px;border-radius:10px;overflow:clip}
.panel-controls{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px;background:#17283b;border-bottom:1px solid #3b5368;position:sticky;top:0;z-index:7}
.panel-switch{display:flex;gap:6px;flex-wrap:wrap}.panel-switch button{font-size:13px;padding:8px 10px}.panel-switch button[aria-pressed=true]{background:#24554d;border-color:#65e0d1}
.back-model{font-size:12px;white-space:nowrap}
.panel-content{min-width:0}.guide-pane,.pathways-pane{min-width:0;scrollbar-gutter:stable}
.brain-layout .reader{margin:0;border:0;border-radius:0;padding:24px;grid-column:auto;background:#121d2e}
.brain-layout .reader h2{font-size:23px}.brain-layout .reader>.study-nav{position:static}
.brain-layout .pathway{border:0;padding:24px}
.brain-layout .hypothalamus-panel{margin:0;border:0;padding:24px;background:#121d2e}
.brain-layout .lesson-body{font-size:16px}
.learning-panel[data-pane=both] .pathways-pane{border-top:2px solid #4b6d81}
.panel-resizer{display:none}
.brain-layout .table-scroll table{min-width:380px}
.brain-layout .network-map .overview-graph{min-width:380px}
.brain-layout .signal-chain{grid-template-columns:1fr}
.atlas-view{position:absolute;inset:0;background:radial-gradient(ellipse at center,#28374b,#101a2c 75%);z-index:5}
.atlas-view canvas{width:100%;height:100%}.atlas-label{position:absolute;top:12px;left:14px;right:14px;pointer-events:none;font-size:12px;color:#bfcede}
.atlas-caption{position:absolute;bottom:12px;left:14px;right:14px;font-size:12px;pointer-events:none;display:flex;justify-content:space-between;gap:15px}
.atlas-status{position:absolute;top:38%;left:8%;right:8%;padding:18px;background:#182b3f;border-radius:8px}
.atlas-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:10px 14px;background:#162638;font-size:12px}.atlas-toolbar button,.atlas-toolbar select{font-size:12px;padding:6px 8px}
.atlas-subtitle{color:#b6cddd;font-size:13px;margin:5px 0 12px}.atlas-key{display:flex;flex-wrap:wrap;gap:7px;margin:8px 0}.atlas-key button{font-size:13px;border-left:4px solid var(--key-colour)}.atlas-key button[aria-pressed=true]{background:#254745;border-color:var(--key-colour)}
@media(min-width:1450px){
 .brain-layout{grid-template-columns:220px minmax(480px,1fr) 8px minmax(360px,var(--panel-width));padding-right:12px}
 .brain-layout .navigator{grid-row:1}.brain-layout .workspace{position:sticky;top:8px}
 .brain-layout #viewport{height:clamp(420px,calc(100dvh - 355px),900px)}
 .learning-panel{grid-column:4;grid-row:1;margin:8px 0;position:sticky;top:8px;height:calc(100dvh - 16px);display:flex;flex-direction:column}
 .panel-content{min-height:0;flex:1;display:grid;grid-template-rows:minmax(0,1fr)}
 .guide-pane,.pathways-pane{overflow:auto;overscroll-behavior:contain}
 .learning-panel[data-pane=both] .panel-content{grid-template-rows:minmax(0,1fr) minmax(0,1fr)}
 .panel-controls{position:static;flex-wrap:wrap}.back-model{display:none}
 .panel-resizer{display:block;grid-column:3;grid-row:1;position:sticky;top:8px;height:calc(100dvh - 16px);cursor:col-resize;touch-action:none;background:linear-gradient(90deg,transparent 3px,#3b5368 3px,#3b5368 5px,transparent 5px)}
 .panel-resizer:hover,.panel-resizer:focus-visible{background:#467c82;outline:0}
}
@media(min-width:1120px) and (max-width:1449px){.learning-panel[data-pane=both] .panel-content{display:grid;grid-template-columns:1fr 1fr}.learning-panel[data-pane=both] .pathways-pane{border-top:0;border-left:2px solid #4b6d81}}
@media(max-width:800px){.brain-layout{grid-template-columns:180px minmax(0,1fr)}.brain-layout .reader,.brain-layout .pathway,.brain-layout .hypothalamus-panel{padding:18px}.panel-controls{flex-wrap:wrap}.learning-panel{margin:0 6px 20px}}
@media(max-width:600px){.brain-layout{display:block}.brain-layout .navigator{position:static;max-height:300px;padding:12px}.brain-layout #structures{display:block;min-height:90px}.brain-layout .scope{display:none}.brain-layout #viewport{height:420px}.panel-switch button{padding:7px}.learning-panel{margin:0 0 16px;border-radius:0}.brain-layout .network-map .overview-graph{min-width:440px}.atlas-caption{font-size:11px}.brain-layout .structure span:last-child{font-size:11px}}

.atlas-hover{position:absolute;z-index:3;pointer-events:none;max-width:270px;padding:6px 10px;font-size:13px;background:#0d1b2e;border:1px solid #6d91a5;border-radius:6px}.brain-layout #viewport{scroll-margin-top:85px}

/* Keep the atlas spatially anchored, without implying cross-atlas registration. */
.atlas-context{position:absolute;top:42px;right:12px;width:170px;background:#101c2ee8;border:1px solid #57718a;border-radius:8px;overflow:hidden;pointer-events:none;font-size:11px;text-align:center;color:#d4e1ee}.atlas-context>span{display:block;padding:6px}.atlas-context-canvas{height:132px;width:100%;overflow:hidden}.atlas-context small{display:block;padding:5px;line-height:1.35;color:#adc4d7}.atlas-view .atlas-context canvas{height:132px!important;width:100%!important}.atlas-label{max-width:calc(100% - 32px)}
.guide-direction:after{content:'↓'}@media(min-width:1450px){.guide-direction:after{content:'→'}}
.guide-attention{animation:guide-attention 1.4s ease-out}.guide-pane h2:focus{outline:2px solid #65e0d1;outline-offset:5px;border-radius:3px}@keyframes guide-attention{from{box-shadow:inset 0 0 0 3px #65e0d1}to{box-shadow:inset 0 0 0 3px transparent}}@media(prefers-reduced-motion:reduce){.guide-attention{animation:none}}
@media(max-width:800px){.atlas-context{width:116px;top:40px;right:7px;font-size:10px}.atlas-context-canvas,.atlas-view .atlas-context canvas{height:87px!important}.atlas-context small{font-size:9px}.atlas-caption{max-width:95%;font-size:10px}}