*{box-sizing:border-box}body{margin:0;background:var(--page);color:var(--ink);font:15px/1.8 -apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,sans-serif}button,select,input{font:inherit}button,select{min-height:44px;padding:8px 12px;border:1px solid var(--border);border-radius:9px;color:var(--ink);background:var(--surface)}button{cursor:pointer}button[aria-pressed=true]{background:var(--tint);color:var(--accent);border-color:var(--accent)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:3px}input[type=range]{width:100%;min-height:34px;accent-color:var(--accent)}input[type=checkbox]{accent-color:var(--accent);width:16px;height:16px}a{color:var(--accent)}[hidden]{display:none!important}.hero{display:grid;grid-template-columns:1fr 280px;gap:36px;align-items:center}.hero picture{height:174px;overflow:hidden;border-radius:12px}.hero img{height:100%;width:100%;object-fit:cover;object-position:30% 55%}.hero .hero-note{font-size:13px!important;margin:8px 0;color:var(--secondary)}.eyebrow{font-size:11px;letter-spacing:.1em;color:var(--secondary);margin:0 0 8px}.observatory{border:1px solid var(--border);border-radius:18px;background:var(--surface);overflow:hidden}.world-bar{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:18px 22px}.worlds{display:flex;gap:8px}.worlds button{padding:9px 20px;text-align:left;min-width:130px}.worlds strong{display:block;font-size:15px;font-weight:600}.worlds span{display:block;font-size:10px;color:var(--secondary)}.world-context{padding:0 24px 16px;display:flex;gap:24px;justify-content:space-between;align-items:center;color:var(--secondary);font-size:12px}.world-context p{margin:0}.world-context>span{color:var(--accent);flex-shrink:0;font-size:11px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 268px;border-block:1px solid var(--border)}.theater{min-width:0}.viewbar{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:9px 16px;font-size:12px}.viewbar>div{display:flex;gap:5px}.viewbar button{padding:6px 13px;min-height:36px;font-size:11px}.viewbar label{display:flex;align-items:center;gap:7px}.viewport{height:520px;position:relative;background:#c6dce1;overflow:hidden;isolation:isolate}.viewport canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;touch-action:pan-y;display:block}.scene-badge{position:absolute;left:16px;top:14px;background:#f3f6ecdf;color:#365554;border:1px solid #eef4e780;border-radius:7px;padding:4px 9px;font-size:11px;pointer-events:none;max-width:calc(100% - 32px)}#scene-status{position:absolute;z-index:3;inset:40% 10% auto;background:var(--surface);color:var(--secondary);padding:16px;text-align:center;border-radius:10px;font-size:13px}#retry{position:absolute;z-index:4;top:60%;left:35%;width:30%}.scene-caption{padding:9px 16px;background:var(--tint);font-size:10px;color:var(--secondary);display:flex;justify-content:space-between;gap:12px}.scene-caption>span:last-child{white-space:nowrap}.inspector{padding:22px;border-left:1px solid var(--border);font-size:12px}.inspector label:not(.check){display:block;margin:16px 0 4px}.inspector label:first-child{margin-top:14px}.inspector select{width:100%;font-size:12px}.inspector output{display:block;font-size:12px;color:var(--accent);font-variant-numeric:tabular-nums}.range-ends{display:flex;justify-content:space-between;font-size:10px;color:var(--secondary)}.presets{display:flex;gap:7px;margin:12px 0 20px}.presets button{font-size:11px;padding:6px 9px;min-height:36px}.control-note{font-size:11px;color:var(--secondary);line-height:1.8}.check{display:flex;align-items:center;gap:8px;margin:18px 0}.parts{display:flex;gap:5px;flex-wrap:wrap}.parts button{font-size:11px;flex:1}.readout{margin-top:22px;border-top:1px solid var(--border);padding-top:17px;font-size:17px;font-weight:600;color:var(--accent)}.playback{padding:12px 16px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:11px}.playback button{font-size:12px}#play{background:var(--accent);color:var(--page);min-width:95px}#scrub{display:flex;align-items:center;gap:10px;flex-basis:100%}#scrub label{white-space:nowrap}#play-status{color:var(--secondary);margin-left:auto}.stages{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;padding:0 16px 14px}.stages button{font-size:11px;line-height:1.5;padding:7px}.questions{display:flex;padding:17px 24px 0;gap:8px}.questions button{font-size:13px;flex:1;max-width:200px}.story{padding:24px;display:grid;grid-template-columns:1fr 2.4fr;gap:30px}.story h2{font-size:23px;line-height:1.5;margin:0;font-weight:600}.story p{margin:0;font-size:14px;line-height:1.95;color:var(--secondary);white-space:pre-line}.story .eyebrow{font-size:10px;margin-bottom:10px}.story .observe{margin-top:14px;padding:10px 14px;background:var(--tint);border-left:2px solid var(--accent);font-size:12px;color:var(--accent)}.science-panel{padding:22px 24px;border-top:1px solid var(--border);background:var(--tint)}.science-panel h3{font-size:13px;margin:0 0 12px}.science-panel p{font-size:13px;line-height:1.95;white-space:pre-line}.science-panel #science-limit{color:var(--secondary);font-size:12px}.comparison{margin:38px 0}.comparison h2{font-size:24px;font-weight:600}.comparison>div>p:not(.eyebrow){font-size:14px;color:var(--secondary)}.comparison-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:24px}.comparison-grid article{border-top:1px solid var(--border);padding-top:15px}.comparison-grid h3{font-size:15px}.comparison-grid p{font-size:13px;color:var(--secondary);line-height:1.85}.comparison-grid button{font-size:12px}#learning-host .learning-companion{margin-top:0;padding-inline:0}@media(max-width:1050px){.world-bar{align-items:start;flex-wrap:wrap}.worlds{flex:1}.worlds button{min-width:110px;flex:1}.world-bar .modes{margin-left:auto}.viewport{height:475px}}@media(max-width:760px){.hero{grid-template-columns:1fr 106px;gap:14px}.hero picture{height:154px}.hero h1{font-size:28px!important}.hero .intro{font-size:13px!important}.hero .hero-note{display:none}.world-bar{padding:14px;gap:12px}.worlds{width:100%;flex:0 0 100%;gap:6px}.worlds button{min-width:0;padding:8px 9px}.worlds strong{font-size:13px}.worlds span{font-size:9px;line-height:1.5}.world-context{padding:0 15px 14px;display:block}.world-context>span{display:block;margin-top:6px}.workspace{grid-template-columns:1fr}.viewport{height:365px}.inspector{border-left:0;border-top:1px solid var(--border);padding:20px}.viewbar{padding:9px 12px}.viewbar button{padding:6px 10px}.scene-caption{font-size:10px;padding:9px 12px}.playback{padding:12px}.stages{padding:0 12px 12px;grid-template-columns:repeat(2,1fr)}.stages button{min-height:40px}.questions{padding:15px 14px 0;gap:5px}.questions button{font-size:12px;padding:7px 5px}.story{grid-template-columns:1fr;gap:12px;padding:20px}.story h2{font-size:21px}.story p{font-size:14px}.science-panel{padding:20px}.comparison-grid{grid-template-columns:1fr;gap:12px}.comparison{margin-top:28px}.comparison h2{font-size:22px}.scene-badge{font-size:10px;left:10px;top:10px}.inspector>div:not([hidden]){max-width:100%}}.air-journey{padding:22px 24px;border-bottom:1px solid var(--border);background:var(--tint)}.journey-heading{display:flex;justify-content:space-between;align-items:center;gap:18px}.journey-heading h2{font-size:22px;line-height:1.5;margin:0;font-weight:600}.journey-heading button{font-size:12px;flex-shrink:0}.air-journey>p{font-size:14px;line-height:1.9;color:var(--secondary);margin:14px 0}.journey-body{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.journey-body svg{display:block;width:100%;height:auto;max-height:225px}.diagram-note{font-size:10px;color:var(--secondary);text-align:center;margin:0}.journey-steps{display:flex;gap:5px}.journey-steps button{flex:1;min-width:0;padding:9px 7px;font-size:11px;line-height:1.6;text-align:left;border-top:3px solid var(--route-color)}.journey-steps b{display:block;font-size:13px;color:var(--route-color)}.journey-steps button[data-current=true]{box-shadow:inset 0 0 0 1px var(--route-color);background:var(--surface)}.journey-body [data-note]{font-size:13px;color:var(--secondary);line-height:1.85;min-height:72px;margin-bottom:0}.air-journey .journey-extra{border-left:2px solid var(--accent);padding-left:12px;font-size:12px}.journey-actions{display:flex;gap:8px;flex-wrap:wrap}.journey-actions button{font-size:12px}.journey-actions [data-next]{background:var(--accent);color:var(--page)}.storm-scale{margin:32px 0;padding:26px;border:1px solid var(--border);border-radius:18px;background:var(--surface);scroll-margin-top:20px}.scale-heading h2{font-size:26px;font-weight:600;margin:0 0 12px}.scale-heading>p:last-child{font-size:14px;color:var(--secondary);margin-bottom:22px}.scale-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:26px;align-items:start}.scale-zoom{display:flex;gap:7px;margin-bottom:12px}.scale-zoom button{flex:1;font-size:12px}.scale-canvas{height:425px;position:relative;overflow:hidden;border-radius:12px;background:#c7d6c1}.scale-canvas canvas{display:block;width:100%;height:100%}.scale-badge{position:absolute;top:14px;left:14px;padding:5px 10px;border-radius:6px;background:#f4f6eee8;color:#38584f;font-size:12px;max-width:calc(100% - 28px)}.scale-caption{font-size:11px;color:var(--secondary);line-height:1.7;margin:8px 0}.scale-layout aside h3{font-size:20px;font-weight:600;line-height:1.6;margin:48px 0 12px}.scale-layout aside>p{font-size:14px;color:var(--secondary);line-height:1.9}.scale-layout aside button{font-size:12px}.size-choice{display:flex;gap:8px;margin-top:20px}.size-choice button{flex:1}.scale-layout aside .scale-ratio{font-size:15px;white-space:pre-line;color:var(--accent);font-weight:600}.scale-layout aside .control-note{font-size:11px}.scale-facts{border-top:1px solid var(--border);margin-top:20px;padding-top:16px;font-size:12px;color:var(--secondary);line-height:1.9}.scale-facts p{margin:0 0 9px}.scale-facts a{display:inline-block;margin:0 20px 0 0;font-size:11px}.worlds strong{font-size:14px}.worlds button{min-width:145px}@media(max-width:950px){.journey-body{grid-template-columns:1fr}.journey-body svg{max-height:180px}.scale-layout{grid-template-columns:1fr}.scale-layout aside h3{margin-top:0}.scale-canvas{height:400px}}@media(max-width:760px){.worlds button{min-width:0}.worlds strong{font-size:12px}.air-journey{padding:20px 14px}.journey-heading{display:block}.journey-heading h2{font-size:20px}.journey-heading button{margin-top:12px}.journey-body{gap:12px}.journey-body [data-note]{min-height:0}.storm-scale{padding:18px 14px}.scale-heading h2{font-size:23px}.scale-canvas{height:340px}.scale-zoom{gap:5px}.scale-zoom button{font-size:11px;padding:7px 5px}.scale-badge{font-size:11px}.scale-facts a{display:block}.scale-layout{gap:15px}}@media(min-width:1000px){html.presentation-page[data-topic-ui] body>main>header.hero{min-height:0;display:block}html.presentation-page[data-topic-ui] .presentation-notes .world-context{display:block;padding:0}html.presentation-page[data-topic-ui] .presentation-notes .world-context>*{width:auto}html.presentation-page[data-topic-ui] .presentation-notes .questions{display:flex;flex-wrap:wrap}}