/* A quiet teaching studio: the world has room, tools live at the edges. */
:root{--ink:#e5f0f4;--muted:#aec1cc;--cyan:#83e3d4;--line:#304955;--amber:#edbe79}
body{background:#0a1923}button,input,select,textarea{font-family:inherit}button:focus-visible,select:focus-visible,input:focus-visible,[role=separator]:focus-visible{outline:2px solid #c6fff1;outline-offset:3px}
.appbar{background:#091922;border-bottom-color:#314853}.brand{letter-spacing:.035em;font-weight:600}.brand-mark{color:#8de6d4}.header-actions button,#concepts-open{border-color:#526c77;border-radius:9px}
.teaching{gap:8px;padding:12px 18px}.lesson-head h1{font-size:clamp(22px,1.8vw,30px);font-weight:560;line-height:1.2}.eyebrow{color:#a6c2ce;letter-spacing:.08em}.scene-toolbar{min-height:38px}.contexts button{border-radius:8px}.segmented{border-radius:10px;padding:3px;background:#081721}.segmented button{border:0;border-radius:7px}.segmented button[aria-pressed=true]{background:#9ae7d7;color:#073331;box-shadow:none}.chapter-controls select{font-size:14px;padding:8px 10px;min-height:36px}
.stages.compare,.ontology-layout.compare{grid-template-columns:minmax(0,var(--world-fraction,54fr)) 8px minmax(0,var(--diagram-fraction,46fr));gap:6px}.scene-divider{position:relative;cursor:col-resize;touch-action:none;border-radius:8px;align-self:stretch;min-width:8px}.scene-divider::before{content:'';position:absolute;left:3px;top:40%;bottom:40%;width:2px;border-radius:4px;background:#7899a7}.scene-divider:hover,.scene-divider:focus-visible,.resizing .scene-divider{background:#8ed4ca28}.stages:not(.compare) .scene-divider{display:none}.resizing{user-select:none}
.stage{border-color:#3b5662;border-radius:14px}.stage-top{height:38px;font-size:14px;letter-spacing:.015em}.stage-top .tiny{font-size:12px;letter-spacing:.04em;color:#9bb4c1}.world-heading{font-size:14px;display:inline}.world-presentation-controls button{font-size:13px;min-height:28px}.stage-bottom{padding:5px 10px;min-height:36px;height:auto;border-top:1px solid #789caf15}.scene-example-actions button{font-size:14px;min-height:28px;background:#234b4c;border-color:#719e9d;color:#e0fff5}
.presentation-strip{min-height:30px;gap:9px}.presentation-strip>button{border-radius:8px}.presentation-strip #presentation-status{color:#adbfca}.reveal{border:1px solid #355461;border-radius:11px;padding:10px 13px;column-gap:16px;background:#122b37}.reveal-label{min-width:85px;font-size:14px}.reveal-label #step-number{font-size:12px;color:#84bdbe}#step-copy{font-size:16px;line-height:1.4}.selection{padding:6px 10px;border-radius:8px}.selection:empty{padding:0}.selection-close{border:0!important;background:none!important;font-size:20px!important;min-width:30px}
.navigation{gap:10px;padding:1px 0}.navigation button{border-radius:8px;min-height:36px}.step-dots{gap:5px}.step-dots button{border:1px solid transparent;background:transparent;color:#afc5cf;padding:6px 10px!important;min-height:36px}.step-dots button[aria-current=true]{background:#214b4e;border-color:#7ecbbb;color:#e0fff6}.step-dots button span{display:inline-grid;place-items:center;border:1px solid #5c7a88;border-radius:50%;width:22px;height:22px;margin-right:5px}.step-dots button[aria-current=true] span{background:#a0e5d7;color:#143c3b;border-color:transparent}.step-dots small{font-size:14px}.navigation .primary{background:#a0e5d7;color:#123932;border-color:#a0e5d7;font-weight:600;box-shadow:none}
.desk-rail{width:68px;background:#0c1e29;padding-top:10px;gap:7px}.desk-rail button{border-color:transparent;border-radius:9px;min-height:52px;color:#b8ced6;font-size:12px}.desk-rail button:hover,.desk-rail button[aria-pressed=true]{background:#1b3743;border-color:#466b79;color:#effffb}.desk-rail button span{font-size:20px}.desk-drawer{background:#112a37;width:360px;box-shadow:-10px 0 32px #0002}.catalog-left #desk-drawer{width:min(540px,calc(100vw - 80px));border-right:1px solid #496775}.drawer-head{padding-bottom:8px;border-bottom:1px solid #41606e}.drawer-head h2{font-size:21px}.drawer-body .card{background:#173542;border-color:#45606c}.catalog-index button{border-radius:9px;background:#112e3c;border-color:#3a5663}.catalog-index button>span{display:grid;place-items:center;width:30px;height:30px;border:1px solid #466f7a;border-radius:8px;font-size:14px}.catalog-index strong{font-size:15px}.catalog-index .catalog-entry-name{min-width:0}.catalog-entry-name small{display:block;color:#94b4c3;font-size:12px;margin-top:4px}.catalog-search-wrap{display:flex;align-items:center;gap:8px}.catalog-search-wrap input{flex:1;min-width:0}.catalog-search-wrap button{padding:4px 9px;font-size:13px;white-space:nowrap}.catalog-ranges button[aria-current=true]{background:#254d4f;border-color:#7ecbbb}.catalog-profile label,.catalog-filter{font-size:14px}
/* Three areas: browse, inspect, explain. No full-page scrolling. */
.asset-dialog{border-radius:16px;background:#0d2430;border-color:#607b85;width:calc(100vw - 28px);height:calc(100dvh - 28px);max-width:1900px}.asset-header{padding:12px 18px;background:#0c202b}.asset-header .eyebrow{display:none}.asset-header h2{font-size:23px;margin:0}.asset-layout{grid-template-columns:minmax(235px,23%) minmax(0,1fr) minmax(290px,26%)}.asset-list-panel{padding:12px;gap:10px;background:#102a37}.asset-preview{border-right:1px solid #395565;min-width:0}.asset-preview-title{padding:12px 16px;font-size:13px;gap:10px}.asset-description{display:flex;flex-direction:column;gap:12px;min-height:0;padding:18px 17px;background:#102936}.asset-description h3{font-size:23px;line-height:1.25;max-height:3.8em;margin:0;overflow:hidden}.asset-description p{font-size:16px;line-height:1.48;margin:0;color:#c2d7df}.asset-description .asset-lesson{margin-top:auto;display:flex;flex-direction:column;align-items:stretch;gap:10px}.asset-lesson>div{flex:none}.asset-lesson select{font-size:14px;min-height:38px}.asset-lesson label{font-size:13px}.asset-lesson #asset-go{width:100%;min-height:42px;font-size:15px;background:#9be5d6;color:#123b36;font-weight:600}.asset-meaning-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin:0;border-bottom:1px solid #355665}.asset-meaning-tabs.has-motion{grid-template-columns:repeat(4,minmax(0,1fr))}.asset-meaning-tabs button{font-size:14px;padding:7px 2px;white-space:nowrap}.asset-meaning-tabs button[hidden]{display:none}.asset-inspection-actions{gap:6px;margin:0}.asset-inspection-actions button{font-size:14px;min-height:32px}.asset-inspection-actions span{display:none}#asset-parts{display:grid;grid-template-columns:1fr 1fr;gap:5px}#asset-parts button{min-height:35px;padding:6px 8px;font-size:14px;text-align:left}#asset-parts button:first-child{grid-column:1/-1}#asset-parts[hidden]{display:none}.asset-motion-controls{display:flex;gap:5px}.asset-motion-controls[hidden]{display:none}.asset-motion-controls button{min-width:0;flex:1;padding:7px 5px;font-size:13px;line-height:1.2}.asset-motion-controls button[aria-pressed=true]{background:#664e29;border-color:#e4bb75;color:#ffe5ba}.asset-camera-bar{grid-template-columns:1fr auto 1fr;padding:10px;gap:4px;border-bottom:0;border-top:1px solid #355266}.asset-camera-bar button{min-height:34px;font-size:13px;padding:5px 7px}.asset-orbit-hint{bottom:16px;font-size:13px;padding:5px;pointer-events:none}.asset-entry{border-radius:9px}.asset-tile-caption{padding:7px 8px}.asset-tile-caption strong{font-size:14px;min-height:2.5em}.asset-tile-caption small{font-size:12px}.asset-detail-badge{font-size:17px;background:#173a45c9;border-radius:20px;padding:3px}.asset-entry.is-mechanism .asset-detail-badge{color:#ffe0a1}.asset-search-row{gap:5px}.asset-search-row button{font-size:13px;padding:5px 8px}.asset-scopes{gap:4px}.asset-scopes button{padding:5px;font-size:14px}.asset-pager{font-size:14px}#asset-scope-caption{white-space:normal;line-height:1.4;font-size:13px;min-height:2.8em}#asset-list{gap:8px}.asset-list-panel .asset-detail-filter{font-size:13px!important}#asset-filters{gap:6px}.asset-filter-summary{display:flex;align-items:center;gap:6px;flex:none;font-size:12px;color:#e7ce99}.asset-filter-summary:empty{display:none}.asset-filter-summary button{font-size:12px;min-height:26px;padding:3px 7px}.asset-load-failed{font-size:13px;text-align:center;padding:10px;color:#c1d9e2}
@media(max-height:820px){.teaching{gap:6px;padding:8px 14px}.lesson-head h1{font-size:23px}.scene-toolbar{min-height:34px}.stage-top{height:34px}.stage-bottom{min-height:32px}.presentation-strip{min-height:28px}.reveal{padding:8px 11px}#step-copy{font-size:16px}.navigation button{min-height:34px}.asset-description{gap:9px;padding:12px}.asset-description h3{font-size:21px}.asset-description p{font-size:14px;line-height:1.4}.asset-preview-title{padding:10px 12px}#asset-parts button{font-size:13px;min-height:31px}.asset-inspection-actions button{font-size:13px}.asset-meaning-tabs button{font-size:13px}.asset-description .asset-lesson{gap:7px}.asset-camera-bar button{font-size:12px}.asset-list-panel{gap:8px}}
@media(max-width:1150px){.asset-layout{grid-template-columns:225px minmax(0,1fr) 285px}.asset-list-panel{padding:9px}.asset-description{padding:12px}.asset-preview-title #asset-family{display:none}.chapter-controls select{min-width:130px;font-size:13px}.world-heading{font-size:13px}.navigation #next-scene{display:none}}
@media(max-width:950px){.asset-layout{grid-template-columns:minmax(210px,29%) minmax(0,1fr);grid-template-rows:minmax(220px,1fr) auto}.asset-list-panel{grid-row:1/3}.asset-preview{border-right:0}.asset-description{grid-column:2;gap:6px;border-top:1px solid #355266}.asset-description h3{font-size:19px}.asset-inspection-actions{position:absolute;right:26px;top:75px}.asset-description #asset-parts{display:flex;flex-wrap:wrap}.asset-description p{font-size:14px}.asset-description .asset-lesson{display:flex;flex-direction:row;align-items:end}.asset-description .asset-lesson>div{flex:1}.asset-description .asset-lesson #asset-go{width:auto}.asset-preview-title{min-height:52px}.asset-orbit-hint{display:none}.step-dots small{display:none}.scene-toolbar{flex-wrap:wrap}.chapter-controls{order:3}.chapter-controls select{width:auto}.stage-bottom{font-size:12px}}
@media(prefers-reduced-motion:reduce){.scene-divider,.asset-entry{transition:none}}