/* Shared device layout, after each simulation's own styles. */
:root{--mobile-bar:calc(60px + env(safe-area-inset-bottom));--mobile-paper:var(--panel,#142536);--mobile-border:var(--line,var(--stroke,var(--border,#385366)));--mobile-ink:var(--ink,var(--text,var(--fg,#ecf4fa)));--mobile-accent:var(--teal,var(--blue,var(--accent,#83dbd2)))}
#mobile-tools,.mobile-panel-heading,#mobile-phase-views{display:none}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
@media(pointer:coarse){body :is(button,summary,select,input:not([type=checkbox]):not([type=range])){min-height:44px}body :is(input:not([type=checkbox]):not([type=range]),select,textarea){font-size:16px}body input[type=range]{min-height:38px;touch-action:pan-y}body button,body summary{touch-action:manipulation}}
:root[data-adaptive-layout=compact] body{padding:8px max(10px,env(safe-area-inset-right)) calc(var(--mobile-bar) + 14px) max(10px,env(safe-area-inset-left));height:auto;min-height:100dvh;overflow-x:clip;overflow-y:auto}
:root[data-adaptive-layout=compact] :is(main,section,aside,header,.heading,.lab-heading){min-width:0}
:root[data-adaptive-layout=compact] :is(body>header,#app>header){gap:8px;margin:0 0 10px;padding:0;display:flex;flex-wrap:wrap;align-items:center}
:root[data-adaptive-layout=compact] :is(.heading,.lab-heading){flex:1;min-width:0!important}
:root[data-adaptive-layout=compact] :is(header h1,.lab-heading h1){font-size:clamp(17px,4.4vw,23px);line-height:1.25;margin:0}
:root[data-adaptive-layout=compact] :is(header .eyebrow,.lab-eyebrow){font-size:9px;letter-spacing:.07em;margin-bottom:4px}
:root[data-adaptive-layout=compact] header :is(.back,a.back-library){width:44px;min-width:44px;min-height:44px}
:root[data-adaptive-layout=compact] header [data-theme-toggle]{width:44px;min-width:44px;max-width:44px;min-height:44px;padding:0;font-size:0!important;overflow:hidden;margin:0}
:root[data-adaptive-layout=compact] header [data-theme-toggle]::before{content:'☀';font-size:20px}
:root[data-adaptive-layout=compact][data-theme=light] header [data-theme-toggle]::before{content:'☾'}
:root[data-adaptive-layout=compact] header :is(#fullscreen,#full,.fullscreen){display:none}
:root[data-adaptive-layout=compact] :is(body>main,body>main.lab,body>main.layout){display:flex;flex-direction:column;gap:10px;width:100%;padding:0;height:auto;min-height:0}
:root[data-adaptive-layout=compact] :is(body>main,body>main.lab,body>main.layout)>*{width:100%;min-width:0;grid-column:auto}
:root[data-adaptive-layout=compact] :is(.workspace,.stage-panel,.observation,.visuals,.experiment){order:0}
:root[data-adaptive-layout=compact] :is(.lab-runbar,.scene-controls,.playback,.stage-bottom>div){gap:6px;flex-wrap:wrap}
:root[data-adaptive-layout=compact] :is(.lab-runbar,.scene-controls,.playback,.stage-bottom>div) button{min-height:44px;font-size:12px;flex-grow:1}
:root[data-adaptive-layout=compact] :is(button,input,select,textarea){max-width:100%}
:root[data-adaptive-layout=compact] :is(input:not([type=checkbox]):not([type=range]),select,textarea){font-size:16px!important;min-height:44px}
:root[data-adaptive-layout=compact] input[type=range]{min-height:38px}
:root[data-adaptive-layout=compact] :is(.tabs,#task-tabs,.stations){display:flex;flex-wrap:nowrap;overflow-x:auto;overscroll-behavior-x:contain;gap:6px;padding:0 0 8px;margin-bottom:8px;scrollbar-width:thin}
:root[data-adaptive-layout=compact] :is(.tabs,#task-tabs,.stations)>*{flex:0 0 auto;min-height:44px;max-width:85vw}
:root[data-adaptive-layout=compact] :is(.panel,.workspace,.scene,.evidence){border-radius:13px}
:root[data-adaptive-layout=compact] #mobile-tools{display:flex;align-items:stretch;gap:6px;position:fixed;inset:auto 0 0;z-index:180;height:var(--mobile-bar);padding:7px max(8px,env(safe-area-inset-right)) calc(7px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));background:var(--mobile-paper);border-top:1px solid var(--mobile-border);box-shadow:0 -4px 18px #0002}
:root[data-adaptive-layout=compact] #mobile-tools button{flex:1;min-width:0;min-height:44px;border:1px solid var(--mobile-border);background:var(--mobile-paper);color:var(--mobile-ink);border-radius:10px;padding:6px 3px;margin:0;font-size:12px;white-space:nowrap;cursor:pointer}
:root[data-adaptive-layout=compact] #mobile-tools button[aria-expanded=true]{background:color-mix(in srgb,var(--mobile-accent) 16%,var(--mobile-paper));border-color:var(--mobile-accent);color:var(--mobile-accent)}
:root[data-adaptive-layout=compact] [data-mobile-panel]{display:none!important}
:root[data-adaptive-layout=compact] [data-mobile-panel][data-mobile-open=true]{display:block!important;position:fixed!important;inset:auto max(6px,env(safe-area-inset-right)) var(--mobile-bar) max(6px,env(safe-area-inset-left))!important;width:auto!important;max-width:740px!important;height:auto!important;max-height:min(48dvh,var(--mobile-panel-space,48dvh))!important;overflow:auto!important;overscroll-behavior:contain;scrollbar-width:thin;padding:0 14px 14px!important;margin:0 auto!important;z-index:170!important;background:var(--mobile-paper)!important;color:var(--mobile-ink);border:1px solid var(--mobile-border);border-radius:16px 16px 0 0;box-shadow:0 -8px 28px #0004;pointer-events:auto;scroll-padding-top:58px}
:root[data-adaptive-layout=compact] [data-mobile-panel]>summary{display:none!important}
:root[data-adaptive-layout=compact] [data-mobile-panel]>.lab-fold-body{padding:0}
:root[data-adaptive-layout=compact] [data-mobile-panel]>.mobile-panel-heading+h2{display:none}
:root[data-adaptive-layout=compact] .mobile-panel-heading{position:sticky;top:0;z-index:3;display:flex;justify-content:space-between;align-items:center;gap:10px;min-height:54px;padding:5px 0;margin-bottom:10px;border-bottom:1px solid var(--mobile-border);background:var(--mobile-paper);font-size:14px;color:var(--mobile-ink)}
:root[data-adaptive-layout=compact] .mobile-panel-heading button{min-height:44px;font-size:12px;padding:5px 12px;background:transparent;color:inherit;border:1px solid var(--mobile-border);border-radius:9px}
:root[data-adaptive-layout=compact] [data-mobile-panel] :is(.controls,.lab-controls){padding:0!important}
:root[data-adaptive-layout=compact] .pylab-sound{display:contents!important}
:root[data-adaptive-layout=compact] .pylab-sound>:is(#sound-toggle,details>summary){display:none!important}
:root[data-adaptive-layout=compact] .pylab-sound summary{display:none!important}
:root[data-adaptive-layout=compact] .pylab-sound .sound-settings{position:fixed!important;inset:auto 8px var(--mobile-bar)!important;z-index:190;width:auto;max-width:440px;max-height:50dvh;overflow:auto;margin-left:auto;border-radius:14px 14px 0 0;background:var(--mobile-paper);color:var(--mobile-ink);border-color:var(--mobile-border)}
:root[data-adaptive-layout=compact] :is(#utility-dock,.utility-dock){display:contents!important}
:root[data-adaptive-layout=compact] #assistant-open{display:none!important}
:root[data-adaptive-layout=compact] #mobile-tools #mobile-volume{flex:0 0 44px;min-width:44px;font-size:19px}
:root[data-adaptive-layout=compact] header [data-action=toggle-audio]{display:none}
:root[data-lab-ui=gas][data-adaptive-layout=compact] header #mode-label{display:none}
:root[data-adaptive-layout=compact] #pylab-qwen::part(launcher){display:none}
:root[data-adaptive-layout=compact] :is(.table-wrap,.table-scroll){max-width:100%;overflow-x:auto}
:root[data-adaptive-layout=compact] :is(.ad-region:has(.ad-card--preview),.scene-hint,.gesture-hint){display:none!important}
/* Force scene: keep actions next to the image, before the longer guide. */
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .workspace{display:flex;flex-direction:column}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .workspace-top{order:-3;padding:11px 13px}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .workspace-top h2{font-size:16px}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .force-reading output{font-size:26px}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .views{order:-2}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] #scene{height:clamp(260px,calc(100svh - 365px),430px)}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .scene-controls{order:-1;padding:8px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .hand-guide-bar{gap:7px;padding:10px}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .hand-guide-bar>strong{flex:1 1 100%}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .hand-guide-bar button{flex:1;margin:0;min-height:44px}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .hand-guide{gap:6px;font-size:12px}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .readings{padding:12px 0}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .readings>div{padding:0 8px}
:root[data-simulation=magnetic-force][data-adaptive-layout=compact] .legend{bottom:12px}
/* Thermal scenes: switch views without changing samples or physical state. */
:root[data-adaptive-layout=compact] .lab-ui>header .lab-heading{flex:1;min-width:0}
:root[data-adaptive-layout=compact] .lab-ui>header :is(.toolbar,.header-actions){flex:0 1 auto;width:auto;gap:5px}
:root[data-adaptive-layout=compact] .lab-ui :is(.vessel canvas,.experiment canvas.apparatus){height:clamp(280px,52svh,480px)}
:root[data-lab-ui=gas][data-adaptive-layout=compact] .lab-ui .observation .apparatus{height:clamp(320px,calc(100svh - 220px),530px)}
:root[data-lab-ui=phase][data-adaptive-layout=compact] #mobile-phase-views{display:flex;gap:6px}
:root[data-lab-ui=phase][data-adaptive-layout=compact] #mobile-phase-views button{flex:1;min-height:44px}
:root[data-lab-ui=phase][data-adaptive-layout=compact] .scenes{display:grid;grid-template-columns:1fr}
:root[data-lab-ui=phase][data-adaptive-layout=compact][data-mobile-phase=apparatus] .scenes>.panel:first-child{display:none}
:root[data-lab-ui=phase][data-adaptive-layout=compact][data-mobile-phase=particles] .scenes>.panel:nth-child(2){display:none}
:root[data-lab-ui=phase][data-adaptive-layout=compact] .lab-ui .scenes canvas{height:clamp(280px,48svh,490px)}
:root[data-lab-ui=oxygen][data-adaptive-layout=compact] .steps{display:flex;overflow-x:auto;gap:5px}
:root[data-lab-ui=oxygen][data-adaptive-layout=compact] .steps a{flex:1;min-width:0;font-size:11px;padding:9px 6px}
:root[data-lab-ui=oxygen][data-adaptive-layout=compact] .lab-ui .scene canvas{height:clamp(280px,48svh,470px)}
:root[data-oxygen-mode=compare][data-adaptive-layout=compact] .lab-ui .scenes{display:grid;grid-template-columns:1fr 1fr}
:root[data-oxygen-mode=compare][data-adaptive-layout=compact] .lab-ui .scene+.scene{border-left:1px solid var(--lab-line);border-top:0}
:root[data-oxygen-mode=compare][data-adaptive-layout=compact] .lab-ui .scene canvas{height:clamp(235px,38svh,370px)}
:root[data-oxygen-mode=compare][data-adaptive-layout=compact] .scene-head{padding:9px 6px;min-height:44px}
:root[data-oxygen-mode=compare][data-adaptive-layout=compact] .scene-head h2{font-size:13px}
:root[data-adaptive-layout=compact] .lab-ui .scenes .caption{font-size:12px}
/* Electromagnetic scenes use available height instead of fixed tall canvases. */
:root:is([data-simulation=faraday],[data-simulation=flux])[data-adaptive-layout=compact] #scene{height:clamp(285px,calc(100svh - 230px),510px)}
:root[data-simulation=faraday][data-adaptive-layout=compact] .instrument-column{display:block}
:root[data-simulation=faraday][data-adaptive-layout=compact] .instrument{display:grid;grid-template-columns:minmax(120px,1fr) 1fr;gap:6px 12px;padding:12px}
:root[data-simulation=faraday][data-adaptive-layout=compact] #dial{max-height:180px;margin:6px 0}
:root[data-simulation=flux][data-adaptive-layout=compact] .playback{width:auto;margin-left:auto}
:root[data-simulation=flux][data-adaptive-layout=compact] .readings{grid-template-columns:repeat(2,minmax(0,1fr))}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .main-controls .speed-control{margin:12px 0;width:100%}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .main-controls>button{margin:4px;min-height:44px}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .stage{height:550px}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] #scene{width:100%;height:285px}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .scene-heading{top:12px;left:14px;max-width:calc(100% - 100px)}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .scene-heading h2{font-size:16px}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .scene-tools{top:10px;right:10px;left:auto;bottom:auto}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .scene-tools button{min-height:44px}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .instrument{top:305px;left:50%;right:auto;transform:translateX(-50%);width:190px;min-width:0;max-width:65%}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .instrument-heading{margin-bottom:4px;display:block;text-align:center}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .instrument-heading h2{font-size:16px}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .instrument-heading p{display:none}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .meter-reading{gap:5px}
:root[data-simulation=ac-generator][data-adaptive-layout=compact] .legend{top:280px;left:12px;right:12px;bottom:auto;flex-direction:row;justify-content:center;font-size:10px}
/* Magnetic keeps its own control-panel state. */
:root[data-simulation=magnetic][data-adaptive-layout=compact] body{height:100dvh;overflow:hidden;display:flex;gap:8px}
:root[data-simulation=magnetic][data-adaptive-layout=compact] .page-header{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px;width:100%}
:root[data-simulation=magnetic][data-adaptive-layout=compact] .brand h1{font-size:16px}
:root[data-simulation=magnetic][data-adaptive-layout=compact] .lab{flex:1;display:flex;flex-direction:column;min-height:0;gap:8px}
:root[data-simulation=magnetic][data-adaptive-layout=compact] .stage-area{order:-1;flex:1;min-height:150px;height:auto;width:100%}
:root[data-simulation=magnetic][data-adaptive-layout=compact] .source-panel{position:relative;inset:auto;flex:0 1 auto;max-height:43%;width:100%;z-index:3;backdrop-filter:none;padding:12px}
:root[data-simulation=magnetic][data-adaptive-layout=compact] .stage-bottom{left:7px;right:7px;bottom:7px}
:root[data-simulation=magnetic][data-adaptive-layout=compact] .scene-actions{flex-wrap:wrap;justify-content:center}
:root[data-simulation=magnetic][data-adaptive-layout=compact] .scene-actions>button{flex:1;min-height:44px;font-size:12px}
:root[data-simulation=magnetic][data-adaptive-layout=compact] .view-tools{display:none}
/* Dynamic chapter pages retain their original event delegation. */
:root:is([data-simulation=induction],[data-simulation=induction-applications],[data-simulation=electromagnetic-wave])[data-adaptive-layout=compact]{height:auto;overflow:visible}
:root[data-adaptive-layout=compact] #app{height:auto;overflow:visible}
:root[data-adaptive-layout=compact] #app main{display:block;padding:0}
:root[data-adaptive-layout=compact] #app .lesson-header h1{flex:1 1 190px}
:root[data-adaptive-layout=compact] #app .lesson-header .back-library{width:auto;min-width:44px;flex:0 0 auto;padding-right:4px}
:root[data-adaptive-layout=compact] #app #scene{height:clamp(230px,40svh,410px)}
:root[data-adaptive-layout=compact] #app #quick-bar{position:static;padding:8px 0;box-shadow:none}
:root[data-adaptive-layout=compact] #app .workbench{display:block}
:root[data-adaptive-layout=compact] #app .panel{padding:12px}
:root[data-adaptive-layout=compact] #app .stations button{font-size:13px;flex:none}
:root.embedded-simulation[data-adaptive-layout=compact] header :is(a.back,a.back-library){display:none}
:root.embedded-simulation[data-adaptive-layout=compact] .lab-ui>header>a{display:none}
@media(orientation:portrait){
 :root[data-adaptive-layout=compact][data-mobile-panel-active=true] :is(#scene,#macro,#micro,.experiment canvas.apparatus,#canvas-real,#canvas-ideal){height:var(--mobile-scene-room,230px)!important;min-height:0!important}
 :root[data-lab-ui=gas][data-adaptive-layout=compact][data-mobile-panel-active=true] .observation .apparatus{height:calc(var(--mobile-scene-room,230px) + 75px)!important}
 :root[data-lab-ui=phase][data-adaptive-layout=compact][data-mobile-panel-active=true][data-mobile-phase=both] .scenes{grid-template-columns:1fr 1fr;gap:6px}
 :root:is([data-lab-ui=internal-energy],[data-lab-ui=temperature-lesson3])[data-adaptive-layout=compact][data-mobile-panel-active=true] .layout .apparatus{height:var(--mobile-scene-room,180px);min-height:0;padding:20px 8px 8px}
 :root:is([data-lab-ui=internal-energy],[data-lab-ui=temperature-lesson3])[data-adaptive-layout=compact][data-mobile-panel-active=true] .layout .vessel{height:calc(var(--mobile-scene-room,180px) - 40px);min-height:48px;max-height:190px}
 :root:is([data-lab-ui=internal-energy],[data-lab-ui=temperature-lesson3])[data-adaptive-layout=compact][data-mobile-panel-active=true] .layout .thermo{height:calc(var(--mobile-scene-room,180px) - 30px);max-height:120px;min-height:45px;top:-15px}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact][data-mobile-panel-active=true] .stage{height:var(--mobile-scene-room,240px)}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact][data-mobile-panel-active=true] #scene{width:67%}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact][data-mobile-panel-active=true] .instrument{top:55px;right:6px;left:auto;width:30%;max-width:none;transform:none}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact][data-mobile-panel-active=true] .instrument h2{font-size:12px}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact][data-mobile-panel-active=true] .legend{top:auto;bottom:8px}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact][data-mobile-panel-active=true] .scene-heading{max-width:60%}
}
@media(min-width:851px) and (max-width:1100px){body.lab-ui>main{gap:10px}.lab-ui .scenes{grid-template-columns:1fr}.lab-ui[data-ui-profile=phase] .scenes canvas{height:300px}.lab-ui .lab-controls{padding:10px!important}}
@media(orientation:landscape) and (max-height:600px){
 :root[data-adaptive-layout=compact] body{--mobile-bar:calc(54px + env(safe-area-inset-bottom))}
 :root[data-adaptive-layout=compact] [data-mobile-panel][data-mobile-open=true]{left:auto!important;right:max(6px,env(safe-area-inset-right))!important;top:6px!important;bottom:var(--mobile-bar)!important;max-height:none!important;width:min(360px,46vw)!important}
 :root[data-adaptive-layout=compact] #mobile-tools{height:var(--mobile-bar);padding-top:4px;padding-bottom:calc(4px + env(safe-area-inset-bottom));justify-content:center}
 :root[data-adaptive-layout=compact] #mobile-tools button{max-width:200px}
 :root[data-simulation=magnetic][data-adaptive-layout=compact] .lab{display:grid;grid-template-columns:minmax(0,1fr) min(300px,42%)}
 :root[data-simulation=magnetic][data-adaptive-layout=compact] .lab.controls-closed{grid-template-columns:minmax(0,1fr)}
 :root[data-simulation=magnetic][data-adaptive-layout=compact] .stage-area{grid-column:1;grid-row:1;min-height:0;height:100%}
 :root[data-simulation=magnetic][data-adaptive-layout=compact] .source-panel{grid-column:2;grid-row:1;inset:auto;width:100%;height:100%;max-height:none}
 :root[data-simulation=magnetic][data-adaptive-layout=compact] #right-hand-guide{left:12px;right:12px;max-width:none;bottom:55px}
 :root:is([data-simulation=magnetic-force],[data-simulation=faraday],[data-simulation=flux])[data-adaptive-layout=compact] #scene{height:max(160px,calc(100svh - 125px))}
 :root[data-simulation=magnetic-force][data-adaptive-layout=compact] .workspace-top{display:none}
 :root[data-adaptive-layout=compact][data-mobile-panel-active=true] body>main{padding-right:calc(min(360px,46vw) + 8px)!important}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] .stage{height:var(--mobile-generator-height,180px)}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] #scene{width:65%;height:100%}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] .instrument{top:5px;left:auto;right:2%;bottom:5px;transform:none;width:29%;max-width:190px;display:flex;flex-direction:column;align-items:center;gap:2px}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] .instrument-heading{margin:0}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] .instrument h2{font-size:12px;margin:0}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] #dial{width:100%;min-height:0;flex:1;height:0;filter:none}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] .meter-reading{margin:0;line-height:1}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] .meter-reading output{font-size:18px}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] .current-direction{font-size:10px;margin-top:2px;min-height:12px}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] .scene-heading{display:none}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] .scene-tools{left:6px;right:auto;top:5px}
 :root[data-simulation=ac-generator][data-adaptive-layout=compact] .legend{top:auto;bottom:4px;right:32%;font-size:9px}
 :root[data-lab-ui=phase][data-adaptive-layout=compact] .lab-ui .scenes canvas{height:250px}
}
@media(prefers-reduced-motion:reduce){#mobile-tools,[data-mobile-panel]{scroll-behavior:auto;transition:none;animation:none}}