:root{color-scheme:light;--ink:#2c3c4c;--muted:#6b7883;--line:#e0e5e8;--blue:#376c85;--orange:#d47c3d;--paper:#fdfdfd}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 'Source Serif 4',Georgia,serif;-webkit-font-smoothing:antialiased}button,input{font:inherit}button,a,input{touch-action:manipulation}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:4px}button{cursor:pointer;color:inherit}button:disabled{opacity:.4;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--blue);outline-offset:4px}[hidden]{display:none!important}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:400}h1{font-size:38px;line-height:1.2;letter-spacing:-.025em}h2{font-size:23px;line-height:1.25}main,.masthead,footer{max-width:1220px;margin:auto;padding-left:36px;padding-right:36px}.masthead{height:82px;display:flex;align-items:center;gap:20px;font-size:18px}.masthead>a:first-child{color:var(--ink)}.masthead>span{color:var(--muted);font-size:15px;border-left:1px solid var(--line);padding-left:20px}.masthead .source-link{margin-left:auto;font-size:14px}.intro{display:flex;align-items:baseline;gap:32px;margin:22px 0 29px}.intro p{color:var(--muted);font-size:18px}.task-tabs{display:flex;gap:30px;border-bottom:1px solid var(--line);margin-bottom:22px}.task-tabs button{border:0;background:none;padding:0 0 12px;font-size:17px;color:var(--muted);position:relative}.task-tabs button[aria-pressed=true]{color:var(--ink)}.task-tabs button[aria-pressed=true]:after{content:'';position:absolute;bottom:-1px;left:0;right:0;height:2px;background:var(--ink)}.experiment{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:30px}.viewport-panel{min-width:0;display:flex;flex-direction:column}.viewport-panel .scene{flex:none;min-height:0}.scene{height:430px;position:relative;background:#edf1f3;overflow:hidden;border:1px solid #e4e8eb;border-radius:4px}.scene canvas{display:block;width:100%;height:100%;touch-action:none}.scene-label,.scene-caption{position:absolute;left:20px;right:20px;display:flex;justify-content:space-between;z-index:1;pointer-events:none;font-size:13px;color:#5b6b76;gap:12px}.scene-label{top:16px}.scene-label span:last-child{font-variant-numeric:tabular-nums}.scene-caption{bottom:15px;align-items:center}.scene-caption button{pointer-events:auto;background:rgba(253,253,253,.8);border:1px solid #d4dde3;border-radius:3px;padding:3px 10px;font-size:13px}.transport{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:17px 0}.status{font-size:15px;color:var(--muted)}.status[data-state=success]{color:#3e7260}.status[data-state=failed]{color:#a4623b}.run-buttons{display:flex;gap:7px;flex-shrink:0}.run-buttons button{background:transparent;border:1px solid #d6dde2;border-radius:3px;padding:7px 12px;font-size:14px}.run-buttons button.primary{background:var(--ink);border-color:var(--ink);color:white}.metrics{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);padding:15px 0 0;gap:12px}.metric span{font-size:13px;color:var(--muted);display:block}.metric output{font-size:24px;font-variant-numeric:tabular-nums}.metric small{font-size:14px;color:var(--muted);margin-left:6px}.task-heading p{color:var(--muted);font-size:15px;margin-top:10px}.controller{padding:0;margin:24px 0 20px;border:0;min-width:0}.controller legend{font-size:14px;margin-bottom:8px;padding:0}.segments{display:flex;border:1px solid #d7dfe4;border-radius:4px;padding:3px;gap:3px}.segments label{position:relative;flex:1;text-align:center;cursor:pointer}.segments input{position:absolute;opacity:0;inset:0;cursor:pointer}.segments span{font-size:14px;display:block;padding:5px 4px;border-radius:2px}.segments input:checked+span{background:#e7edf0;color:#294958}.segments input:focus-visible+span{outline:2px solid var(--blue)}.controller p{font-size:13px;color:var(--muted);margin-top:7px;min-height:20px}.parameter{display:block;margin-top:16px;font-size:15px}.parameter>span{display:flex;justify-content:space-between;gap:8px}.parameter output{font-variant-numeric:tabular-nums;color:var(--blue)}input[type=range]{width:100%;height:18px;accent-color:var(--blue);display:block;margin:8px 0 1px;cursor:pointer}.parameter small{display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}.try{font-style:italic;font-size:14px;color:#627582;border-top:1px solid var(--line);padding-top:15px;margin-top:19px}.plot-heading{display:flex;justify-content:space-between;font-size:13px;margin-top:22px}.plot-heading span:last-child{color:var(--muted)}#plot{width:100%;height:94px;display:block}.plot-legend{font-size:12px;color:var(--muted);display:flex;gap:20px}.plot-legend i{display:inline-block;width:15px;border-top:2px solid var(--blue);vertical-align:middle;margin-right:6px}.plot-legend i.dashed{border-top:2px dashed var(--orange)}.experiment-note{border-top:1px solid var(--line);padding:18px 0 0;margin-top:24px;display:flex;justify-content:space-between;gap:36px;align-items:baseline}.experiment-note p{font-size:16px;max-width:690px}.experiment-note>span{font-size:12px;color:var(--muted);text-align:right}.context{margin-top:66px;border-top:1px solid var(--line);padding-top:36px;display:grid;grid-template-columns:1fr 1fr;gap:60px;scroll-margin-top:24px}.eyebrow{display:block;font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}.context p{font-size:16px;margin-top:16px}.context .thesis{color:#5c6d7a;font-style:italic}.context figure{margin:0}.context video{width:100%;display:block;border-radius:3px;background:#e8edf0}.context figcaption{font-size:13px;color:var(--muted);margin-top:8px}.model-notes{margin:35px 0 50px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;font-size:14px;color:#5b6b77}.model-notes summary{cursor:pointer;color:var(--ink);font-size:15px}.notes-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;margin-top:20px}.notes-grid h3{font-size:17px;color:var(--ink)}.notes-grid p{margin:10px 0}.reading{margin:14px 0 5px}footer{display:flex;justify-content:space-between;padding-top:0;padding-bottom:26px;font-size:14px;color:var(--muted)}#loading{position:absolute;inset:0;display:grid;place-content:center;font-size:16px;padding:35px;text-align:center}.error{background:#edf1f3;z-index:2}.error a{display:block;margin-top:12px}
@media(min-width:1450px){.scene{height:480px}main,.masthead,footer{max-width:1300px}}@media(max-width:1000px){.intro{display:block}.intro p{margin-top:10px}.experiment{grid-template-columns:minmax(0,1fr) 250px;gap:24px}.scene{height:410px}.transport{align-items:flex-start;flex-direction:column}.status{min-height:23px}.context{gap:32px}}
@media(max-width:760px){main,.masthead,footer{padding-left:20px;padding-right:20px}.masthead{height:68px}.source-link{display:none}.intro{margin-top:18px}h1{font-size:31px}.intro p{font-size:17px}.task-tabs{gap:22px;overflow:auto}.task-tabs button{font-size:15px;white-space:nowrap}.experiment{grid-template-columns:1fr;gap:28px}.scene{height:390px}.viewport-panel .scene{flex:none;min-height:0}.transport{flex-direction:row;align-items:center;flex-wrap:wrap;gap:10px}.controls{display:grid;grid-template-columns:1fr 1fr;column-gap:24px}.task-heading,.parameters,.try,.plot-heading,#plot,.plot-legend{grid-column:1/-1}.controller{grid-column:1/-1;margin:18px 0 0}.parameters{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.parameter:last-child{grid-column:1/-1}.experiment-note{flex-direction:column;gap:10px}.experiment-note>span{text-align:left}.context{margin-top:40px;grid-template-columns:1fr;gap:25px}.notes-grid{grid-template-columns:1fr;gap:16px}footer>span{display:none}}
@media(max-width:420px){main,.masthead,footer{padding-left:16px;padding-right:16px}h1{font-size:28px}.scene{height:330px}.scene-label,.scene-caption{left:12px;right:12px;font-size:12px}.task-tabs{gap:19px}.metric span{font-size:12px}.metric output{font-size:22px}.run-buttons{width:100%}.run-buttons .primary{margin-left:auto}.parameters{column-gap:18px}.parameter{font-size:14px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
/* Flight and contact instruments. */
.scene-readout{position:absolute;top:39px;right:20px;z-index:1;font-size:12px;color:#627582;pointer-events:none}.scene-tools{display:flex;gap:9px;align-items:center;pointer-events:auto}.scene-tools label{font-size:13px;white-space:nowrap}.scene-tools select{font:inherit;color:var(--ink);border:1px solid #d4dde3;border-radius:3px;padding:3px;background:rgba(253,253,253,.9)}.vector-legend{display:flex;gap:20px;font-size:12px;color:var(--muted);margin-top:10px;flex-wrap:wrap}.vector-legend i{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:6px}.velocity-key{background:#568da8}.force-key{background:#d17d39}.metrics[data-count="4"]{grid-template-columns:repeat(4,minmax(0,1fr))}.advanced{margin-top:18px;font-size:14px;color:var(--muted)}.advanced summary{cursor:pointer}.advanced[open]{padding-bottom:12px}.advanced .parameter{color:var(--ink)}
@media(max-width:1000px){.scene-caption>span{max-width:100px;font-size:12px}.scene-tools{gap:5px}.scene-tools label{font-size:12px}}
@media(max-width:760px){.advanced{grid-column:1/-1}.advanced[open]{display:grid;grid-template-columns:1fr 1fr;column-gap:24px}.advanced summary{grid-column:1/-1}.metrics[data-count="4"]{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:12px}.scene-caption>span{max-width:110px}.scene-tools select{padding:5px}.scene{height:420px}.scene-readout{right:12px}.vector-legend{gap:5px 14px;font-size:11px}.parameters .parameter:last-child{grid-column:auto}}
@media(max-width:420px){.scene{height:370px}.scene-tools{gap:5px}.scene-tools label{font-size:11px}.scene-tools button{font-size:12px;padding:4px 7px}.scene-caption>span{max-width:88px;font-size:11px}}

.scene-label > span,.scene-readout{background:rgba(237,241,243,.88);padding:2px 5px;border-radius:3px}

/* Explicit, repeatable disturbances and repair contact state. */
.disturbance-strip{display:flex;align-items:center;justify-content:space-between;gap:10px 18px;padding:0 0 15px;font-size:13px;color:var(--muted);flex-wrap:wrap}.disturbance-strip label{display:flex;gap:7px;align-items:center;cursor:pointer;color:var(--ink)}.disturbance-strip input{accent-color:var(--blue);margin:0}.disturbance-strip output{font-variant-numeric:tabular-nums}.disturbance-strip output[data-fired=true]{color:#a76332}.contact-explanation{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}.scene-nudge{position:absolute;left:20px;top:49px;z-index:2;padding:4px 8px;border-left:2px solid #ba6a31;background:rgba(253,247,239,.92);color:#985425;font-size:13px;pointer-events:none}.scene-readout{max-width:65%;text-align:right}.scene-nudge~#loading{z-index:3}@media(max-width:420px){.disturbance-strip{font-size:12px}.scene-nudge{left:12px;top:74px;font-size:12px}.scene-readout{max-width:90%;top:41px}.contact-explanation{font-size:13px}}

.disturbance-options{display:flex;flex-wrap:wrap;gap:8px 20px}.focus-hud{position:absolute;z-index:2;left:50%;bottom:63px;transform:translateX(-50%);display:flex;gap:18px;align-items:center;white-space:nowrap;padding:7px 10px 7px 14px;background:rgba(253,253,253,.94);border:1px solid #cdd8df;border-radius:4px;color:#425c6a;font-size:13px}.focus-hud button{font:inherit;background:transparent;border:0;border-left:1px solid #d5dfe4;padding:2px 0 2px 12px;color:var(--blue)}.focus-hud button:hover{text-decoration:underline;text-underline-offset:3px}@media(max-width:420px){.disturbance-options{gap:8px 14px}.focus-hud{font-size:12px;gap:10px;padding:6px 9px;max-width:95%}.focus-hud button{padding-left:9px}}

.scene{scroll-margin-top:20px}

.viewport-panel{position:relative}.alignment-detail{position:absolute;top:79px;right:14px;width:224px;z-index:1;border:1px solid #d5dfe5;background:rgba(253,253,253,.96);border-radius:4px;padding:9px 10px 8px;pointer-events:none}.alignment-title{display:flex;justify-content:space-between;font-size:13px;color:#425f70}.alignment-title small{font-size:11px;color:var(--muted)}#alignment-section{display:block;width:100%;height:214px}.alignment-detail p{font-size:11px;line-height:1.4;color:#657b88;margin-top:1px}@media(max-width:1000px) and (min-width:761px){.alignment-detail{width:174px;right:10px}#alignment-section{height:194px}}@media(max-width:760px){.alignment-detail{position:relative;top:auto;right:auto;width:100%;margin-top:10px;padding:10px 14px}.alignment-detail #alignment-section{height:214px}.alignment-detail p{font-size:12px}}

@media(min-width:761px){.scene[data-active-task=repair] .focus-hud{left:14px;transform:none;max-width:calc(100% - 220px);white-space:normal;gap:4px 10px;flex-wrap:wrap}}