:root{font-family:system-ui,-apple-system,'Noto Sans KR',sans-serif;color:#173047;background:#f3f6f9;font-size:16px;line-height:1.6;--ink:#112d46;--teal:#007b74}*{box-sizing:border-box}body{margin:0}button,input,a{-webkit-tap-highlight-color:transparent}button,a,input{touch-action:manipulation}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #e89827;outline-offset:4px}header{height:84px;background:white;border-bottom:1px solid #dce4ea;display:flex;align-items:center;justify-content:space-between;padding:0 4vw}.brand{font-size:1.2rem;font-weight:800;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:12px}.mark{background:var(--ink);color:#76dfd3;width:39px;height:39px;border-radius:12px;display:grid;place-items:center;font-size:1.8rem}.header-note{font-size:.75rem;letter-spacing:.14em;color:#667787}.shell{max-width:1600px;margin:auto;display:grid;grid-template-columns:290px minmax(0,1fr)}aside{padding:40px 24px;border-right:1px solid #dce4ea}.eyebrow{font-size:.8rem;font-weight:700;letter-spacing:.08em;color:var(--teal);margin:0 0 10px}h1{font-size:1.65rem;line-height:1.5;letter-spacing:-.05em;margin:0 0 16px}.intro{font-size:.9rem;color:#647486;margin-bottom:34px}nav{display:grid;gap:12px}nav a{display:flex;align-items:center;gap:13px;text-decoration:none;color:#43596c;padding:18px 12px;border:1px solid transparent;border-radius:12px}nav a.active{background:var(--ink);color:white;box-shadow:0 6px 15px #102d4615}nav a:hover:not(.active){background:#e5edf2}nav small{display:block;font-size:.78rem;opacity:.75;margin-bottom:3px}nav strong{font-size:.92rem}nav a>span:last-child{margin-left:auto}.num{font-size:.8rem;opacity:.6}.side-note{border-top:1px solid #d4dee5;margin-top:44px;padding-top:24px;font-size:.875rem;color:#647486}.side-note b{color:#334e64}.side-note p{line-height:1.9}main{padding:36px 38px;min-width:0}.heading{display:flex;align-items:center;justify-content:space-between;gap:12px}h2{font-size:1.8rem;margin:0;letter-spacing:-.04em}.badge{font-size:.78rem;color:var(--teal);background:#dff1ed;border:1px solid #bddfd6;border-radius:30px;padding:5px 12px;white-space:nowrap}.question{display:flex;align-items:baseline;gap:18px;margin:22px 0;background:#e5edf3;border-left:3px solid #7da0b9;padding:13px 18px;border-radius:0 8px 8px 0}.question span{font-size:.8rem;font-weight:700;white-space:nowrap}.question p{margin:0;font-size:.95rem}.experiment{background:white;border:1px solid #dbe4eb;border-radius:16px;overflow:hidden;display:grid;grid-template-columns:minmax(0,1fr) 245px}.visual{background:#10283e;color:#edf8ff;padding:18px;min-width:0}.visual-head{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:.85rem;color:#b5c8d7}.visual-head button{background:transparent;border:1px solid #486073;border-radius:7px;color:#dfeaf2;padding:9px 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#ccd9e2;border-radius:7px;padding:9px;font:inherit;font-weight:650;color:#173047;min-height:44px}.number-row span{font-size:.85rem;white-space:nowrap}input[type=range]{width:100%;min-height:44px;accent-color:var(--teal);cursor:pointer}.ends{display:flex;justify-content:space-between;color:#718293;font-size:.75rem}.hint{font-size:.8rem;color:#6d7d8a}.notes{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:25px}.notes>div,.notes details{padding:0 5px}.notes p{font-size:.9rem;color:#5a6d7d;margin:9px 0;line-height:1.8}summary{font-size:.9rem;font-weight:700;cursor:pointer;min-height:30px}.formula{font-family:monospace;background:#e6edf2;border-radius:7px;padding:8px}.sources{border-top:1px solid #dce4ea;margin-top:25px;padding-top:20px}.sources a{display:inline-block;font-size:.875rem;color:var(--teal);margin:10px 20px 0 0;min-height:35px}.sources p{font-size:.78rem;color:#738390;margin:3px 0}footer{margin-top:32px;font-size:.75rem;color:#778894;display:flex;justify-content:space-between}.experiment.expanded{position:fixed;inset:12px;z-index:10;box-shadow:0 0 0 30px #10283edd;overflow:auto}.expanded .visual{display:flex;flex-direction:column}.expanded #drawing{flex:1;display:grid;align-items:center}.expanded svg{max-height:65vh}@media(min-width:1450px){.experiment{grid-template-columns:minmax(0,1fr) 270px}}@media(max-width:1100px){.shell{grid-template-columns:225px minmax(0,1fr)}aside{padding:30px 15px}main{padding:28px 22px}.experiment{grid-template-columns:1fr}.controls{padding:16px 20px}.control-title{margin-bottom:8px}#inputs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.field{margin:0}.hint{margin-bottom:0}.intro{font-size:.8rem}h1{font-size:1.4rem}}@media(max-width:760px){header{height:66px;padding:0 18px}.header-note{display:none}.shell{display:block}aside{border:0;padding:20px 18px 0}aside h1,aside>.eyebrow,.intro,.side-note{display:none}nav{display:flex;gap:8px;overflow-x:auto;padding-bottom:5px}nav a{flex:0 0 auto;padding:11px 14px}nav a .num,nav a>span:last-child{display:none}nav strong{font-size:.85rem}nav small{font-size:.75rem}main{padding:20px 18px}h2{font-size:1.45rem}.badge{display:none}.question{display:block;padding:10px 13px;margin:16px 0}.question p{margin-top:4px}.notes{grid-template-columns:1fr;gap:18px}.visual{padding:14px}.stats{gap:18px}.stat b{font-size:1.3rem}#inputs{gap:16px}.experiment.expanded{inset:5px}footer span{display:none}}@media(max-width:380px){#inputs{grid-template-columns:1fr}.brand{font-size:1.05rem}}
/* Shared experiment notebook and expanded catalog */
.nav-group{font-size:.8rem;font-weight:750;margin:16px 12px 0;color:#576c7c}nav{gap:6px}nav a{padding:11px 12px}aside h1{font-size:1.45rem}.intro{margin-bottom:18px}.side-note{margin-top:25px}.playback{display:flex;align-items:center;gap:10px;margin-top:12px}.playback button{background:#007b74;color:white;border:0;border-radius:7px;padding:9px 18px;min-height:44px}.playback span{font-size:.8rem;color:#627787}[hidden]{display:none!important}.notebook{background:white;border:1px solid #dbe4eb;border-radius:14px;padding:24px;margin-top:24px}.notebook-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.notebook h3{font-size:1.1rem}#record-count{font-size:.8rem;color:#607686;margin-left:8px;font-weight:400}.notebook button{min-height:44px;border:1px solid #cbd9e2;background:white;border-radius:8px;padding:9px 14px;color:#294b61;font-size:.85rem}.notebook button.primary{background:#007b74;color:white;border-color:#007b74;font-weight:650}.notebook button:disabled{opacity:.45;cursor:default}.writing{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}.writing label{font-size:.875rem;font-weight:650}.writing textarea{display:block;resize:vertical;width:100%;font:inherit;font-weight:400;color:#213e54;margin-top:8px;padding:12px;min-height:94px;border:1px solid #ccd9e2;border-radius:8px;background:#f8fafc}.writing textarea:focus-visible{outline:3px solid #e89827}.table-scroll{overflow-x:auto;margin-top:20px;border-top:1px solid #e0e7ed}.table-scroll table{border-collapse:collapse;width:100%;font-size:.85rem;white-space:nowrap}.table-scroll th,.table-scroll td{padding:12px 14px;text-align:right;border-bottom:1px solid #e0e7ed}.table-scroll thead th{background:#f2f6f9;color:#4e687d;font-weight:600;font-size:.8rem}.empty-records{text-align:center;font-size:.875rem;color:#6e8090;padding:15px 0;line-height:1.8}.notebook-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px}#status{font-size:.875rem;color:#00756d;min-height:22px;margin:8px 0 0}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.visual{align-self:stretch}.visual #drawing{margin:18px 0}.visual-head{flex-wrap:wrap}.expanded .controls{overflow-y:auto}.expanded #drawing{margin:0}@media(min-width:1101px){.experiment{grid-template-columns:minmax(0,1fr) 260px}.controls{padding:18px}.field{margin-bottom:16px}.visual{display:flex;flex-direction:column}.visual #drawing{flex:1;display:grid;align-items:center}}@media(max-width:760px){.nav-group{display:none}nav a{padding:10px 13px}.notebook{padding:16px}.writing{grid-template-columns:1fr}.notebook-heading{flex-wrap:wrap}.notebook-actions{flex-wrap:wrap}.playback{flex-wrap:wrap}#inputs{row-gap:20px}.controls{padding:16px}.expanded{display:block}.expanded .visual{min-height:65vh}.expanded #drawing svg{max-height:52vh}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}
/* Motion controls share the same shell across all experiments. */
.options{display:grid;gap:10px;margin:14px 0}.option{display:flex;align-items:center;gap:10px;font-size:.875rem;min-height:44px;cursor:pointer}.option input{width:22px;height:22px;accent-color:#007b74;flex-shrink:0}.lab-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.lab-actions button{font:inherit;font-size:.85rem;min-height:44px;padding:9px 12px;border-radius:7px;border:1px solid #c4d4df;background:#eff5f8;color:#25465b}.playback{flex-wrap:wrap}.playback span{flex-basis:100%}.drawing-help{font-size:.85rem;color:#bed7e7;margin:0 0 12px}.interactive-drawing{touch-action:none}.interactive-drawing svg{user-select:none}.table-scroll td{text-align:left;white-space:normal;min-width:180px}.table-scroll th:first-child{min-width:50px}#stats{min-height:92px}.visual #drawing{min-height:250px}
.field select{width:100%;min-height:46px;font:inherit;font-size:.875rem;color:#173047;padding:9px;border:1px solid #ccd9e2;border-radius:7px;background:#f5f8fa}.field select:focus-visible{outline:3px solid #e89827}
/* Reusable practice panel: touch-friendly inputs, no fixed width on mobile. */
.practice{margin-top:24px;padding:24px;background:#fff;border:1px solid #bddfd6;border-radius:14px}.practice h3{font-size:1.2rem}.practice>p{max-width:75ch}.answer-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.answer-fields label{font-size:.9rem;font-weight:650}.answer-fields label>span{display:flex;align-items:center;gap:10px;margin-top:8px}.answer-fields input{min-width:0;width:100%;min-height:48px;border:1px solid #bdccd6;border-radius:8px;padding:10px;font:inherit}.answer-fields em{font-style:normal;white-space:nowrap;font-size:.85rem}.practice-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.practice button{min-height:46px;border:1px solid #bdccd6;border-radius:8px;background:#f3f7fa;color:#173047;padding:10px 18px}.practice button.primary{background:#007b74;color:white;border-color:#007b74}.practice-feedback{font-weight:650;color:#174e57;min-height:26px}.practice-hint,.practice-solution{padding:16px;border-radius:8px;background:#edf5f4;margin-top:12px;line-height:1.9}.practice-solution{background:#fff4df}@media(max-width:600px){.practice{padding:16px}.answer-fields{grid-template-columns:1fr}}
.lab-tabs{display:flex;gap:8px;margin:20px 0 12px;flex-wrap:wrap}.lab-tabs button{min-height:48px;padding:12px 20px;border:1px solid #b8cbd7;border-radius:9px;font:inherit;font-weight:650;background:white;color:#24465b}.lab-tabs button[aria-selected=true]{background:#112d46;color:white;border-color:#112d46}.lab-tabs button:hover{border-color:#007b74}@media(max-width:600px){.lab-tabs button{flex:1;padding:10px;font-size:.9rem}}

.option-toggle{min-height:46px;padding:10px 16px;border:1px solid #9b7abd;border-radius:8px;background:#f5effc;color:#503373;font:inherit}.option-toggle[aria-pressed=true]{background:#644285;color:#fff}

/* Course selection and a full-width activity workspace. */
.shell{display:block;max-width:1600px}header{height:64px}main{padding:24px 28px}
#library-screen{max-width:1050px;margin:32px auto}#library-title{font-size:1.9rem;margin:22px 0 28px}
.selection-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.selection-list .selection-card{display:flex;align-items:center;min-height:112px;padding:26px 28px;background:white;border:1px solid #cbd9e2;border-radius:14px;color:#112d46;font-size:1.2rem;font-weight:700;text-decoration:none;box-shadow:0 4px 14px #112d4608}
.selection-list .selection-card:hover{background:#e8f4f2;border-color:#007b74}
#library-back,.back-link{display:inline-flex;align-items:center;min-height:44px;color:#007b74;text-decoration:none;font-weight:650;margin-bottom:12px}
.heading h2{font-size:1.6rem}.question{margin:14px 0}.lab-tabs{margin:14px 0 10px}
.experiment{grid-template-columns:minmax(0,1fr) 290px}.controls{padding:18px}
#inputs{display:block}.field{margin-bottom:16px}.visual #drawing{margin:8px 0}
#drawing svg{max-height:540px}.experiment[data-lab=kepler] #drawing svg{max-height:600px}
.experiment[data-lab=kepler][data-lesson="1"] #drawing svg{max-height:none}
@media(min-width:901px){.controls{max-height:calc(100dvh - 40px);overflow-y:auto;position:sticky;top:16px;align-self:start}.experiment{overflow:clip}.visual{display:flex;flex-direction:column}.visual #drawing{display:grid;align-items:center}.playback{position:sticky;bottom:-18px;background:white;padding:12px 0;margin-bottom:-4px;border-top:1px solid #e1e8ee}}
@media(max-width:1100px) and (min-width:901px){main{padding:18px}.experiment{grid-template-columns:minmax(0,1fr) 265px}.controls{padding:16px}.visual{padding:14px}.stats{gap:16px}.stat b{font-size:1.3rem}}
@media(max-width:900px){.experiment{grid-template-columns:minmax(0,1fr)}#inputs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.field{margin:0}.controls{padding:18px}.experiment.expanded{display:block}}
@media(max-width:600px){main{padding:16px}.selection-list{grid-template-columns:minmax(0,1fr)}.selection-list .selection-card{min-height:86px;padding:20px;font-size:1.05rem}#library-screen{margin:12px auto}#library-title{font-size:1.6rem}.heading h2{font-size:1.4rem}}
@media(max-width:380px){#inputs{grid-template-columns:1fr}}

.selection-list .selection-card{justify-content:space-between;gap:12px}.lab-tabs button{font-size:.9rem;padding:10px 14px}.badge{white-space:normal}
.selection-list .selection-card>span{margin:0}

.practice-choices{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 8px}.practice-choices button{min-width:48px;min-height:48px;padding:10px 14px;border:2px solid #bdcdd8;border-radius:8px;background:white;color:#173047;font-size:1rem}.practice-choices button[aria-pressed="true"]{background:#173047;color:white;border-color:#007b74}.practice-choices+.answer-fields:empty{display:none}

[data-point-choice]{cursor:pointer;touch-action:manipulation}[data-point-choice]:focus-visible{outline:none}[data-point-choice]:focus-visible circle:first-child{stroke:#fff;stroke-width:2;stroke-dasharray:4 3}

/* Worksheet-led classroom layout shared by every activity. */
.controls .practice{margin:16px 0 0;padding:16px 0 0;border:0;border-top:1px solid #dce4ea;border-radius:0;background:transparent}
.controls .practice>button{width:100%;min-height:48px}.practice details{margin-top:12px}.practice summary,.notes summary,details.notebook>summary{cursor:pointer;min-height:44px;padding:10px 0;font-weight:600}.practice .answer-fields{display:grid;grid-template-columns:1fr}.practice-result{padding:12px;background:#e5f3ef;border-radius:8px;overflow-wrap:anywhere}.notes{display:block}.notes details{border-bottom:1px solid #dce4ea;padding:8px 0}.notes .sources{margin:0;border:0}.notebook:not([open]){padding:8px 20px}.writing[hidden]{display:none}.practice-reference p{font-size:.9rem}.controls .practice .primary{white-space:normal}#status:empty{display:none}

.sequence-pool,.sequence-order{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.sequence-pool button,.sequence-order button{min-width:48px;min-height:48px;font-size:1rem}.sequence-order{padding:12px;border:1px solid var(--line,#426273);border-radius:8px;min-height:72px;align-items:center}.sequence-direction{font-size:.85rem;color:#bed0df}.practice [data-check]{margin:8px 0}.practice [data-feedback],.practice [data-solution]{line-height:1.65;word-break:keep-all}
.fault-choice{border:1px solid #426273;border-radius:8px;margin:16px 0;padding:10px}.fault-choice label{display:inline-flex;align-items:center;gap:8px;min-height:48px;margin-right:16px}.fault-choice input{width:20px;height:20px}

/* Station records: shared time axes, separate physical quantities. */
.front-inquiry{width:100%;min-width:0}.front-overview{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;align-items:center}.front-inquiry .front-map svg{min-height:0;max-height:260px}.front-reading h3{font-size:1rem;margin:12px 0}.front-reading dl{margin:8px 0;display:grid;gap:7px}.front-reading dl>div{display:flex;flex-wrap:wrap;justify-content:space-between;gap:4px 10px;font-size:.9rem}.front-reading dt{color:#bed0df}.front-reading dd{margin:0;color:#fff}.front-reading p,.front-legend{font-size:.875rem;line-height:1.6;color:#bed0df}.front-stations{display:flex;gap:6px;flex-wrap:wrap}.front-stations button{min-width:44px;min-height:44px;background:#173047;border:1px solid var(--station);color:var(--station);border-radius:8px;font:inherit}.front-stations button[aria-pressed=true]{background:var(--station);color:#102638;font-weight:700}.front-legend{margin:10px 0 16px}.front-inquiry>svg{min-height:0!important;max-height:none!important;margin:10px 0}.front-inquiry svg text{font-size:14px}.front-map svg text{font-size:18px}.front-unavailable{min-height:100px}.front-explanation{background:#183b4e;border:1px solid #456678;border-radius:8px;padding:16px;margin-top:14px;font-size:.95rem;line-height:1.7;word-break:keep-all}.front-explanation p{margin:8px 0}.experiment[data-lab=weather-fronts] #drawing{display:block}.experiment[data-lab=weather-fronts] #stats{min-height:0}.experiment[data-lab=weather-fronts] .visual{display:block}@media(max-width:600px){.front-overview{grid-template-columns:1fr}.front-inquiry .front-map svg{max-height:230px}.front-reading dl{grid-template-columns:1fr 1fr;gap:10px}.front-reading dl>div{display:block}.front-reading p{margin:8px 0}.front-stations{justify-content:center}}
.front-chart{margin:18px 0}.front-chart-heading{display:flex;flex-wrap:wrap;justify-content:space-between;gap:5px 12px;font-size:.9rem;line-height:1.6;margin-bottom:4px}.front-chart-heading b{font-weight:600}.front-chart svg{min-height:0!important;max-height:none!important;cursor:crosshair;touch-action:pan-y}.front-chart svg:focus-visible{outline:2px solid #7de0cf;outline-offset:3px}.front-easy-note{font-size:.9rem;line-height:1.7;color:#d2e6ee;border-left:3px solid #7de0cf;padding:8px 12px;margin:0 0 14px;background:#183b4e}
.timeline{border-top:1px solid #dce4ea;margin-top:16px;padding-top:14px}.timeline label{font-size:.9rem;font-weight:650}.timeline output{display:block;font-size:1rem;font-weight:650;color:#007b74;margin:6px 0}.timeline input{width:100%;min-height:44px}.timeline p{font-size:.85rem;color:#5a6d7d;margin:4px 0}.timeline p:empty{display:none}

.front-judgment{margin-top:20px;padding:16px;border:1px solid #456678;border-radius:8px;font-size:1rem}.front-judgment h3{font-size:1.05rem}.front-judgment button{font:inherit;min-height:44px;padding:8px 14px;margin:4px;border:1px solid #8098ab;border-radius:8px;background:#173047;color:#fff}.front-judgment button[aria-pressed=true]{background:#7de0cf;color:#102638;border-color:#7de0cf}.front-side-row{display:flex;align-items:center;flex-wrap:wrap;gap:4px}.front-side-row b{min-width:80px}.front-judgment p{line-height:1.6}
.experiment[data-lab=eclipses] #drawing>svg{width:100%;height:auto;max-height:none;min-height:0}.experiment[data-lab=eclipses] #drawing svg svg{min-height:0;max-height:none}.experiment[data-lab=eclipses] #drawing{display:block;touch-action:none}

.phase-marks{display:flex;justify-content:space-between;font-size:.8rem;color:#526c7d}.phase-marks[hidden]{display:none}

.experiment[data-lab=planet-view] #drawing>svg{width:100%;height:auto;max-height:none;min-height:0}.experiment[data-lab=planet-view] #drawing{display:block}

.experiment[data-lab=planet-view] .stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 24px;align-items:start}
.experiment[data-lab=planet-view] .stat{min-width:0;min-height:72px}
.experiment[data-lab=planet-view] .stat b{font-variant-numeric:tabular-nums;display:inline-block;min-width:7ch;font-size:1.2rem;line-height:1.5}
.experiment[data-lab=planet-view] .stat:nth-child(2) b{min-width:0;font-size:1rem}
.experiment[data-lab=planet-view] #time-seek-value{display:none}
.experiment[data-lab=planet-view] .timeline .ends{font-variant-numeric:tabular-nums}
.planet-history-playing{display:none}
.experiment[data-lab=planet-view][data-playing=true] .planet-history-label{display:none}
.experiment[data-lab=planet-view][data-playing=true] .planet-history-playing{display:inline}

/* Hubble inquiry: use the shared landscape graph / controls layout. */
.experiment[data-lab=expansion] #drawing{display:block}
.hubble-inquiry{min-width:0;width:100%}
.hubble-inquiry>svg{min-height:0!important;max-height:440px!important}
.hubble-legend{font-size:.875rem;line-height:1.6;color:#bed7e7;margin:4px 0 12px}
.hubble-table{width:100%;border-collapse:collapse;table-layout:fixed;font-size:.875rem;font-variant-numeric:tabular-nums}
.hubble-table caption{text-align:left;color:#bed7e7;font-size:.875rem;margin-bottom:6px}
.hubble-table th,.hubble-table td{border-bottom:1px solid #355065;text-align:right;padding:7px 8px;overflow-wrap:anywhere}
.hubble-table th:first-child{width:20%;text-align:left}
.hubble-table thead th{color:#bed7e7;font-weight:500}
.hubble-feedback{font-size:1rem;line-height:1.7;border-left:3px solid #7de0cf;background:#183b4e;padding:12px;margin:14px 0 4px;word-break:keep-all;overflow-wrap:anywhere}
.experiment[data-lab=expansion] .stats{gap:12px 24px;min-height:80px}
.experiment[data-lab=expansion] .stat b{font-size:1.15rem;font-variant-numeric:tabular-nums}
.experiment[data-lab=expansion] .lab-actions button{min-height:48px;width:100%;white-space:normal}

/* Moving digits are hidden while playing; pause exposes stable whole-unit readings. */
.hubble-playing{display:block;font-size:.875rem;color:#bed7e7;line-height:1.6}
.experiment[data-lab=expansion][data-playing=true] .hubble-playing{display:block}
.experiment[data-lab=expansion][data-playing=true] .hubble-reading,
.experiment[data-lab=expansion][data-playing=true] #time-seek-value,
.experiment[data-lab=expansion][data-playing=true] .stat:nth-child(n+4) b,
.experiment[data-lab=expansion][data-playing=true] .stat:nth-child(n+4) em{visibility:hidden}

.hubble-inquiry>svg.hubble-expansion{max-height:none!important}

.wave-panels{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.wave-panel{min-width:0;background:#102c3d;border:1px solid #355065;border-radius:10px;padding:10px}.wave-panel h3{margin:0 0 4px;font-size:1rem}.wave-panel svg{width:100%;height:auto;min-height:0!important;max-height:none!important}.wave-panel svg text{font-size:18px}.wave-task,.wave-note,.wave-concept{line-height:1.65;word-break:keep-all}.wave-note{font-size:.875rem;color:#bed7e7}.wave-concept{padding:12px;background:#183b4e;border-left:3px solid #7de0cf}.wave-concept h3{margin-top:0;font-size:1rem}.experiment[data-lab=waves][data-playing=true] #time-seek-value{visibility:hidden}@media(max-width:700px){.wave-panels{grid-template-columns:1fr}}

/* Equilibrium tide inquiry, scoped to the existing activity. */
.experiment[data-lab=surge-tides] #drawing{display:block}.tide-inquiry{width:100%;min-width:0}.tide-panels{display:grid;grid-template-columns:1fr 1fr;gap:12px}.tide-panels section{min-width:0;border:1px solid #355065;border-radius:10px;padding:10px;background:#102c3d}.tide-inquiry h3{font-size:1rem;margin:4px 0 10px}.tide-inquiry svg{width:100%;height:auto;min-height:0!important;max-height:none!important}.tide-inquiry svg text{font-size:17px}.tide-task,.tide-concept{line-height:1.7;word-break:keep-all}.tide-note{font-size:.875rem;line-height:1.6;color:#bed7e7}.tide-concept{padding:12px;background:#183b4e;border-left:3px solid #7de0cf}.tide-concept svg{max-height:175px!important}.experiment[data-lab=surge-tides][data-playing=true] #time-seek-value{visibility:hidden}.experiment[data-lab=surge-tides] .stat b{font-variant-numeric:tabular-nums;font-size:1.15rem}.experiment[data-lab=surge-tides] .lab-actions button{min-height:44px}@media(max-width:1100px){.tide-panels{grid-template-columns:1fr}}

/* Plate inference: observation map and interval measurements stay together. */
.experiment[data-lab=plate-evidence] #drawing{display:block}.plate-inquiry{width:100%;min-width:0}.plate-panels{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(220px,1fr);gap:16px;align-items:center}.plate-panels section{min-width:0}.plate-inquiry svg{width:100%;height:auto;min-height:0!important;max-height:none!important}.plate-inquiry svg text{font-size:18px}.plate-table{width:100%;border-collapse:collapse;font-size:.9rem;font-variant-numeric:tabular-nums}.plate-table caption{text-align:left;margin-bottom:12px;font-weight:650}.plate-table th,.plate-table td{padding:10px 6px;border-bottom:1px solid #355065;text-align:center}.plate-table tr.selected{background:#39463c;color:#ffcb79}.plate-note{font-size:.875rem;line-height:1.65;color:#bed7e7}.plate-task,.plate-explanation{line-height:1.75;word-break:keep-all}.plate-explanation{padding:14px;background:#183b4e;border-left:3px solid #7de0cf}.plate-explanation p{margin:8px 0}.experiment[data-lab=plate-evidence] .stat b{font-variant-numeric:tabular-nums;font-size:1.1rem}@media(max-width:1100px){.plate-panels{grid-template-columns:1fr}.plate-table th,.plate-table td{padding:7px}}

/* One map: fixed present-day observations and animated model volcanoes. */
.plate-history{width:100%;min-width:0}.history-map{width:100%}.history-map svg{display:block;width:100%;height:auto;min-height:0!important;max-height:480px!important}.history-map svg text{font-size:17px}.history-clock{min-height:1.6em;font-size:.9rem;color:#bed7e7;font-variant-numeric:tabular-nums;margin:4px 0;text-align:center}.history-legend{line-height:1.9}.history-legend span{white-space:nowrap}.plate-history .plate-table{table-layout:fixed}.plate-history .plate-table th,.plate-history .plate-table td{overflow-wrap:anywhere}.experiment[data-lab=plate-evidence][data-playing=true] #time-seek-value{visibility:hidden}.experiment[data-lab=plate-evidence] .lab-actions button{min-height:44px}

/* Crust-thickness inquiry: graph and evidence remain together on landscape tablets. */
.crust-inquiry{font-size:16px;line-height:1.55}.crust-given{margin:0 0 12px;color:#d6e8f4}.crust-layout{display:grid;grid-template-columns:minmax(0,1fr) 225px;gap:20px;align-items:start}.crust-layout section{min-width:0}.crust-inquiry svg{display:block;width:100%;height:auto}.crust-inquiry svg text{font-size:14px}.crust-legend{display:flex;gap:14px;flex-wrap:wrap;font-size:14px;min-height:28px}.crust-direct{color:#7de0cf}.crust-ref{color:#ffcb79}.crust-table table{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}.crust-table caption{text-align:left;font-weight:600;margin-bottom:9px}.crust-table th,.crust-table td{padding:5px 7px;text-align:right;border-bottom:1px solid #29485d}.crust-table th{white-space:nowrap}.crust-table button{padding:4px 12px;min-height:32px;font-size:14px}.crust-table tr.selected{background:#24485a}.crust-muted{font-size:14px;color:#b7ccdb}.crust-buttons,.crust-judgments{display:flex;gap:10px;flex-wrap:wrap;margin:10px 0}.crust-inquiry button{min-height:42px;white-space:normal}.crust-inquiry button:disabled{opacity:.45;cursor:default}.crust-work{border-top:1px solid #345365;margin-top:16px;padding-top:14px}.crust-work h3{font-size:17px;margin:0 0 8px}.crust-work p{margin:8px 0}.crust-answer{display:flex;align-items:end;flex-wrap:wrap;gap:12px;margin:12px 0}.crust-answer label{display:grid;gap:6px;font-size:14px}.crust-answer input{width:110px;min-height:42px;background:#10283e;border:1px solid #567286;border-radius:6px;color:#fff;padding:7px;font:inherit;font-size:16px}.crust-feedback{min-height:1.6em;color:#ffcb79;margin:10px 0;font-size:15px}.crust-work>button{margin:5px 8px 5px 0}.crust-inquiry button:focus-visible,.crust-inquiry input:focus-visible{outline:2px solid #ffcb79;outline-offset:3px}
@media(max-width:760px){.crust-layout{grid-template-columns:1fr}.crust-table table{max-width:440px}.crust-answer{align-items:stretch}.crust-answer label{flex:1}.crust-answer>button{width:100%}}
.crust-inquiry button{border:1px solid #587184;border-radius:7px;background:#193b50;color:#e5f1f7;padding:8px 12px;font-size:14px}.crust-inquiry button[aria-pressed=true]{background:#31596a;border-color:#7de0cf}.experiment[data-lab=earth-interior] #drawing{display:block}.experiment[data-lab=earth-interior] .stat b{font-size:1.05rem;font-variant-numeric:tabular-nums}.experiment[data-lab=earth-interior] #drawing svg{min-height:0;max-height:none}.crust-table td button{min-height:36px;padding:4px 10px}
@media(max-width:1200px){.crust-layout{grid-template-columns:1fr}.crust-table table{max-width:500px}}
@media(max-width:600px){.crust-inquiry svg text{font-size:24px}.crust-minor-tick{display:none}.crust-legend{gap:8px}.crust-table td button{min-height:44px}}
.crust-calculated{display:grid;gap:6px;font-size:14px}.crust-calculated output{display:block;min-width:9ch;min-height:42px;padding:6px 10px;border-left:3px solid #7de0cf;background:#193b50;color:#e5f1f7;font-size:20px;font-variant-numeric:tabular-nums}.crust-formula{font-size:18px;overflow-wrap:anywhere}


/* Foehn inquiry: fixed axes, single-variable comparisons, calm playback labels. */
.foehn-inquiry {padding:12px; font-size:14px;line-height:1.55}
.foehn-panels {display:grid;grid-template-columns:1fr 1fr;gap:14px}
.foehn-panels section {min-width:0;background:#122b3c;border:1px solid #355065;border-radius:12px;padding:8px}
.foehn-panels h3 {margin:4px 8px;font-size:15px}
.foehn-panels svg {display:block;width:100%;height:auto}
.foehn-given,.foehn-task {background:#183344;border-radius:8px;padding:10px 12px}
.foehn-legend {display:flex;flex-wrap:wrap;gap:6px 16px;font-size:12px;margin:8px 0}
.foehn-legend span:nth-child(1) {color:#7de0cf}.foehn-legend span:nth-child(2) {color:#ffcb79}.foehn-legend span:nth-child(3) {color:#aebfff}
.foehn-position {min-height:1.6em;font-variant-numeric:tabular-nums}
[data-lab="moist-air"][data-playing="true"] .foehn-current {visibility:hidden}
.foehn-table {overflow-x:auto}.foehn-table table {width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
.foehn-table th,.foehn-table td {text-align:center;padding:8px 6px;border-bottom:1px solid #355065}
.foehn-table caption {text-align:left;padding:8px 0;font-weight:bold}
.foehn-feedback {min-height:1.5em;color:#ffcb79}.foehn-note {color:#abc0cf;font-size:12px}
@media(max-width:650px){.foehn-panels {grid-template-columns:1fr}.foehn-inquiry{padding:6px}.foehn-table th,.foehn-table td{padding:6px 3px;font-size:12px}}
.experiment[data-lab="moist-air"] #drawing {display:block}
.experiment[data-lab="moist-air"] #drawing svg {min-height:0;max-height:none}
.foehn-panels svg text {font-size:19px}
.experiment[data-lab="moist-air"] .stat b {font-variant-numeric:tabular-nums}

/* Cloud particle inquiry: full curves plus a readable local pressure comparison. */
.precip-inquiry{padding:12px;font-size:16px;line-height:1.55}
.precip-panels{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.precip-panels section{min-width:0;background:#122b3c;border:1px solid #355065;border-radius:12px;padding:8px}
.precip-panels h3{font-size:16px;margin:4px 8px}
.experiment[data-lab="precipitation"] #drawing{display:block}
.experiment[data-lab="precipitation"] #drawing svg{width:100%;height:auto;min-height:0;max-height:none;display:block}
.precip-panels svg text{font-size:19px}
.precip-given,.precip-result,.precip-explain{background:#183344;padding:10px 12px;border-radius:8px}
.precip-result{min-height:3em}
.precip-legend{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:14px}
.precip-legend span:nth-child(1){color:#7de0cf}.precip-legend span:nth-child(2){color:#ffcb79}.precip-legend span:nth-child(3){color:#aebfff}
.precip-feedback{min-height:1.6em;color:#ffcb79}
.precip-table{overflow-x:auto}.precip-table table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
.precip-table th,.precip-table td{padding:8px 6px;text-align:center;border-bottom:1px solid #355065}
.precip-table caption{text-align:left;font-weight:bold;padding:8px 0}
.precip-note{font-size:14px;color:#abc0cf}.precip-goals{font-size:14px}
@media(max-width:1100px){.precip-panels{grid-template-columns:1fr}}
@media(max-width:600px){.precip-inquiry{padding:6px}.precip-panels svg text{font-size:21px}}

/* Domain headings stay within the course's existing activity list. */
.activity-group{grid-column:1/-1;min-width:0}
.activity-group h2{font-size:1.25rem;color:#112d46;margin:8px 0 14px;padding-bottom:10px;border-bottom:2px solid #cbd9e2}
.activity-group+.activity-group{margin-top:12px}
.activity-group-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
@media(max-width:600px){.activity-group-grid{grid-template-columns:minmax(0,1fr)}.activity-group h2{font-size:1.15rem}}


/* Atmosphere inquiries share the catalog, controls and notebook of the existing site. */
.atmo-view{font-family:inherit;color:#e5f0f7;min-width:0}.atmo-svg{display:block;width:100%;height:auto;overflow:hidden;font-family:inherit}.atmo-svg text{font-variant-numeric:tabular-nums}.atmo-table-wrap{overflow:auto;margin-top:12px;max-height:300px;border:1px solid #2a465b;border-radius:10px}.atmo-table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.6;background:#102838}.atmo-table th,.atmo-table td{padding:10px 13px;border-bottom:1px solid #2a465b;text-align:left;white-space:nowrap;font-variant-numeric:tabular-nums}.atmo-table th{background:#193344;color:#cfe1eb;font-weight:600}.atmo-table caption{text-align:left;padding:10px 13px;font-weight:600;color:#b9d4e2}.atmo-note{font-size:14px;line-height:1.7;color:#b4cbd9;margin:12px 0 0}.atmo-feedback{padding:12px 15px;background:#193344;border-left:3px solid #79dfca;line-height:1.7;margin:14px 0;font-size:15px}.atmo-legend{display:flex;flex-wrap:wrap;gap:8px 18px;margin:6px 0;font-size:14px;color:#b8cedd}.atmo-legend span{display:inline-flex;align-items:center;gap:7px}.atmo-legend i{width:17px;height:3px;display:inline-block}.atmo-section-label{font-size:15px;color:#c7dee9;margin:16px 0 0}.atmo-steps{padding:12px 15px;background:#142e3f;border-radius:8px;font-size:15px;line-height:1.8}.atmo-compare{margin-top:16px;border-top:1px solid #2a465b;padding-top:8px}.atmo-key{color:#79dfca}.atmo-badge{display:inline-block;font-size:12px;border:1px solid #426476;border-radius:6px;padding:3px 7px;margin:0 0 9px}@media(max-width:600px){.atmo-table th,.atmo-table td{padding:8px}.atmo-note{font-size:13px}}
.experiment[data-lab^="atmos-"] #drawing{display:block;min-width:0}
.experiment[data-lab^="atmos-"] #drawing svg{width:100%;height:auto;min-height:0;max-height:none}
.experiment[data-lab^="atmos-"] .stat b{font-variant-numeric:tabular-nums;min-height:1.5em}
.experiment[data-lab^="atmos-"][data-playing=true] #time-seek-value,
.experiment[data-lab^="atmos-"][data-playing=true] .stat b,
.experiment[data-lab^="atmos-"][data-playing=true] .atmo-live-number{visibility:hidden}
/* Energy readings are the observation target in the radiation activity. */
.experiment[data-lab="atmos-radiation"][data-playing=true] .atmo-live-number,
.experiment[data-lab="atmos-radiation"][data-playing=true] .stat b{visibility:visible}
.experiment[data-lab="atmos-radiation"] .stat b{display:inline-block;min-width:5ch}
.experiment[data-lab="atmos-radiation"] .playback{position:static;margin-bottom:12px}
.experiment[data-lab="atmos-radiation"] .atmo-steps{margin:0 0 16px}
.radiation-balance{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:12px 0;font-variant-numeric:tabular-nums}
.radiation-balance>div{min-width:0;border:1px solid #39586b;border-radius:8px;padding:12px;background:#102838}
.radiation-balance span{display:block;min-height:3em;line-height:1.5;font-size:14px;color:#cfe1eb;word-break:keep-all}
.radiation-balance b{display:inline-block;min-width:5ch;font-size:25px;color:#79dfca}
.radiation-balance small{display:block;font-size:13px;color:#a9bfce}
@media(max-width:480px){.radiation-balance{grid-template-columns:1fr}.radiation-balance span{min-height:0}}
.experiment[data-lab^="atmos-"] [data-point-choice]{cursor:pointer;touch-action:manipulation}
.experiment[data-lab^="atmos-"] [data-point-choice]:focus-visible{outline:3px solid #ffca80;outline-offset:4px}
.experiment[data-lab^="atmos-"] .atmo-record-hint{margin:12px 0 0;font-size:.875rem;color:#bad0dc}

/* Atmosphere inquiry revision: scoped controls and compact evidence tray. */
.energy-path-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.45rem;margin:.6rem 0}
.energy-path{display:flex;align-items:center;justify-content:space-between;gap:.65rem;text-align:left;min-height:44px;white-space:normal;line-height:1.4}
.energy-path b{flex-shrink:0;font-variant-numeric:tabular-nums}
.energy-path[aria-pressed="true"],.inquiry-evidence button[aria-pressed="true"]{outline:2px solid #79dfca;background:#204d50}
.inquiry-evidence{margin-top:1rem;padding:.8rem;border:1px solid #36556b;border-radius:12px}
.inquiry-evidence h3{margin:.1rem 0 .65rem;font-size:1rem}
.inquiry-evidence p{line-height:1.6}
.atmo-svg [role="button"]{cursor:pointer}
.atmo-svg [role="button"]:focus{outline:2px solid #79dfca}
#lab-panel[data-lab="atmos-synoptic"][data-playing="true"] .atmo-table{font-variant-numeric:tabular-nums}
@media(max-width:600px){.energy-path-grid{grid-template-columns:1fr}}

/* Audit repair: keep tablet columns; stack wind diagrams on narrow screens. */
.column-condition{padding:12px 15px;background:#142e3f;border-left:3px solid #79dfca;border-radius:8px;line-height:1.7;font-size:15px}
.column-condition strong{display:block;color:#79dfca}
.column-forces{margin-top:18px;border-top:1px solid #2a465b;padding-top:12px}
.column-forces h3{font-size:1rem;line-height:1.6;margin:0 0 8px}
.column-forces p{font-size:14px;line-height:1.7}
.column-layer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));gap:12px}
.column-layer-grid figure{margin:0;min-width:0;padding:10px;border:1px solid #2a465b;border-radius:10px;background:#102838}
.column-layer-grid figcaption{font-size:15px;line-height:1.7;text-align:center;font-variant-numeric:tabular-nums}
.column-layer-svg{display:block;width:100%;max-width:420px;height:auto;margin:auto;font-family:inherit;font-variant-numeric:tabular-nums}
.column-balance{text-align:center;font-variant-numeric:tabular-nums;margin:6px 0}
.wind-title{font-size:1.05rem;line-height:1.6;margin:8px 0 12px}
.wind-panels{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.wind-panels figure{margin:0;min-width:0;padding:10px;background:#102838;border:1px solid #2a465b;border-radius:10px}
.wind-panels figcaption{font-size:.9rem;line-height:1.6;text-align:center;color:#e5f0f7}
.wind-panels p{font-size:.875rem;line-height:1.6;text-align:center;color:#b4cbd9;margin:6px 0}
@media(max-width:600px){
 #lab-tabs[data-lab^="atmos-"]{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
 #lab-tabs[data-lab^="atmos-"] button{min-width:0;white-space:normal;word-break:keep-all;overflow-wrap:anywhere;line-height:1.5}
 #lab-tabs[data-lab^="atmos-"] button:only-child{grid-column:1/-1}
 .wind-panels{grid-template-columns:minmax(0,1fr)}
}

/* Wind comparisons: wrap whole cards; keep pressure geometry above force vectors. */
.wind-case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:12px;margin:12px 0}
.wind-case-grid figure{min-width:0;margin:0;padding:12px;border:1px solid #36556b;border-radius:10px;background:#102838}
.wind-case-grid figcaption{font-size:16px;line-height:1.6;text-align:center;font-weight:600}
.wind-case-svg{display:block;width:100%;height:auto;max-width:380px;margin:auto;font-family:inherit;font-variant-numeric:tabular-nums}
.wind-case-grid p{font-size:14px;line-height:1.7;text-align:center;margin:6px 0;color:#b4cbd9}
.wind-case-grid .wind-case-result{font-size:17px;color:#e5f0f7;font-weight:600;font-variant-numeric:tabular-nums}
.wind-reference-empty{display:flex;align-items:center;justify-content:center;text-align:center;line-height:1.8;min-height:180px;padding:18px;border:1px dashed #36556b;border-radius:10px;color:#b4cbd9}

/* Synoptic inquiry: paired columns, optional reference panels, stable readings. */
.synoptic-task{padding:14px 16px;border-left:3px solid #79dfca;background:#102838;line-height:1.8;word-break:keep-all}
.synoptic-task strong{display:block;margin-bottom:4px}
.synoptic-heading,.synoptic-extra h3{font-size:1rem;line-height:1.6;margin:20px 0 10px}
.synoptic-columns{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:12px}
.synoptic-columns figure{min-width:0;margin:0;padding:12px;border:1px solid #36556b;border-top:3px solid var(--synoptic-site-color);border-radius:10px;background:#102838}
.synoptic-columns figcaption{color:var(--synoptic-site-color);text-align:center;font-size:18px;line-height:1.6;font-weight:600}
.synoptic-columns figcaption span,.synoptic-pressure span{display:block;font-size:14px;font-weight:400;color:#b4cbd9}
.synoptic-column-svg{display:block;width:100%;max-width:380px;height:auto;margin:auto;font-family:inherit;font-variant-numeric:tabular-nums}
.synoptic-pressure{color:var(--synoptic-site-color);text-align:center;font-size:21px;line-height:1.8;margin:4px 0;font-variant-numeric:tabular-nums}
.synoptic-extra{border-top:1px solid #36556b;margin-top:24px;padding-top:4px}
.synoptic-reading{font-variant-numeric:tabular-nums}
#lab-panel[data-lab="atmos-synoptic"][data-playing="true"] .synoptic-reading{visibility:hidden}

/* Shared concept and worksheet navigation for every retained activity. */
.learning-tools{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin:12px 0}.learning-tools a{display:inline-flex;align-items:center;min-height:44px;padding:9px 15px;border:1px solid #68deca;border-radius:8px;color:#a8f1e3;text-decoration:none}.learning-tools span{font-size:13px;color:#b8cdd9}
.lesson-guide{margin:12px 0 18px;padding:12px 16px;border:1px solid #365262;border-radius:10px;background:#102432}.lesson-guide summary{cursor:pointer;font-weight:600;min-height:24px}.lesson-concepts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 24px}.lesson-guide h4{font-size:15px;margin:16px 0 6px;color:#c5eee7}.lesson-guide p,.lesson-guide li{font-size:14px;line-height:1.75;word-break:keep-all;overflow-wrap:anywhere}.lesson-current{border-top:1px solid #365262;margin-top:12px}.lesson-current ol{padding-left:22px}.learning-tools a:focus-visible{outline:3px solid #ffc879;outline-offset:3px}
@media(max-width:600px){.lesson-concepts{grid-template-columns:1fr}.learning-tools span{width:100%}.lesson-guide{padding:12px}}