*{box-sizing:border-box}
html{scroll-behavior:auto;scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);font:400 16px/1.65 var(--font-ui);-webkit-font-smoothing:antialiased}
button,input,select{font:inherit;color:inherit}
a{color:inherit;text-underline-offset:.24em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
button,select,summary{cursor:pointer}
button,input,select,a,summary{-webkit-tap-highlight-color:transparent}
button:disabled{opacity:.6;cursor:wait}
:focus-visible{outline:2px solid var(--ink);outline-offset:5px}
[hidden]{display:none!important}
h1,h2,h3,h4,p,ul,ol,figure,dl,dd{margin:0}
h1,h2,h3,h4{font-weight:400;line-height:1.2;letter-spacing:-.025em;text-wrap:balance}
p{ text-wrap:pretty }
ul,ol{padding:0}
sup,sub{line-height:0}
.frame{width:calc(100% - 2 * var(--page-inset));max-width:var(--content);margin-inline:auto}
.sr-only,.email-field>span,.method-rail{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.skip{position:fixed;top:16px;left:24px;z-index:50;padding:12px 16px;background:var(--ink);color:var(--paper);transform:translateY(-200%)}
.skip:focus{transform:none}
.masthead{min-height:var(--header-height);display:flex;align-items:center;gap:32px}
.wordmark{font-size:26px;line-height:1;font-weight:500;letter-spacing:-1px;text-decoration:none;margin-right:auto}
.masthead nav{display:flex;gap:32px;align-items:center}
.masthead nav a{font-size:14px;text-decoration:none;padding-block:12px}
.masthead nav a:hover{text-decoration:underline}
.appearance{display:grid;place-items:center;flex-shrink:0;width:40px;height:40px;padding:0;border:0;background:transparent;color:var(--muted)}
.appearance:hover{color:var(--ink)}
.theme-moon{display:none}
:root[data-theme="dark"] .theme-sun{display:none}
:root[data-theme="dark"] .theme-moon{display:block}
/* The opening is one bounded scene, with a single shared centre axis. */
.hero{min-height:calc(100svh - var(--header-height));display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:64px 0}
.hero-label{font-size:14px;color:var(--muted);margin-bottom:24px}
.hero h1{color:var(--hero-ink);font-size:clamp(56px,5.6vw,72px);font-weight:300;line-height:1.08;letter-spacing:-.045em;max-width:100%;margin-bottom:0}
.hero-description{font-size:18px;font-weight:400;line-height:1.5;letter-spacing:-.015em;margin:16px auto 36px;max-width:40ch;color:var(--hero-copy-ink);text-wrap:balance}
.signup{width:min(100%,416px);margin-inline:auto}
.soon{font-size:13px;line-height:1.5;color:var(--muted);margin-bottom:16px}
.notify{display:flex;gap:0;min-width:0;align-items:center;border:1px solid var(--strong-line);border-radius:4px;padding:4px 4px 4px 16px;transition:border-color .16s,box-shadow .16s}
.email-field{flex:1;min-width:0}
.notify input{width:100%;min-width:0;min-height:44px;border:0;border-radius:0;background:transparent;padding:10px 0;font-size:15px;line-height:24px}
.notify input::placeholder{color:var(--muted);opacity:1}
.notify button,.solid-button{display:inline-flex;align-items:center;justify-content:center;min-height:52px;background:var(--ink);color:var(--paper);border:1px solid var(--ink);border-radius:var(--radius);padding:12px 20px;font-size:14px;font-weight:500;white-space:nowrap;text-decoration:none;transition:opacity .15s}
.notify button{background:var(--ink);color:var(--paper);border:0;border-radius:2px;min-height:44px;padding:10px 14px;font-weight:400}
.button-idle>span{display:inline-block;margin-left:12px;transition:transform .16s}
.notify button:hover,.solid-button:hover{opacity:.82}
.notify:focus-within{border-color:var(--ink);box-shadow:0 0 0 1px var(--ink)}
.notify button:hover .button-idle>span{transform:translateX(2px)}
.button-busy{display:none}
button[aria-busy="true"] .button-idle{display:none}
button[aria-busy="true"] .button-busy{display:inline}
.consent-line{font-size:12px;line-height:1.5;color:var(--muted);margin:16px auto 0;max-width:560px;text-wrap:balance}
.hero .consent-line{opacity:0;visibility:hidden}
.hero .signup:focus-within .consent-line{opacity:1;visibility:visible}
.consent-line a{white-space:nowrap}
.form-feedback{min-height:0}
.form-error{font-size:14px;padding:12px 0 0}
.prereg-done{font-size:16px;background:var(--surface);padding:16px;border-radius:var(--radius)}
.signup noscript{font-size:12px;color:var(--muted);display:block;margin-top:12px}
.explore-link{display:inline-flex;align-items:center;gap:16px;margin-top:40px;text-decoration:none;font-size:14px}
.explore-link span{font-size:18px;transition:transform .2s}
.explore-link:hover span{transform:translateY(3px)}
/* All editorial content shares these twelve columns and text origins. */
.section-intro,.fields li,.principles,.questions-grid,.acknowledgements,.document-page article{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:var(--gutter)}
.section-intro{align-items:start;padding:var(--section-space) 0 32px}
.intro-heading{grid-column:1/span 6;min-width:0}
.section-label{font-size:14px;color:var(--muted);margin-bottom:16px;line-height:1.5}
.section-intro h2,.questions-grid h2{font-size:32px;line-height:1.2}
.section-description{grid-column:7/span 6;max-width:var(--body-measure);font-size:16px;line-height:1.65;color:var(--muted)}
.science-band{--sheet:var(--paper);background:var(--paper)}
.science-section{padding-bottom:0;border-top:1px solid var(--line)}
.science-section .section-intro{padding-block:48px 32px}
.science-section .section-label{display:none}
.method-selector{position:sticky;top:0;z-index:5;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-block:1px solid var(--line);gap:0;background:var(--paper)}
.method-selector>a{position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 12px;text-decoration:none;color:var(--muted);transition:background .16s}
.method-selector strong{font-size:18px;line-height:1.2;font-weight:400;letter-spacing:-.02em;color:inherit}
.method-selector>a>span{font-size:12px;line-height:1.4;letter-spacing:0}
.method-selector>a[aria-selected="true"]{color:var(--ink);background:var(--surface)}
.method-selector>a[aria-selected="true"] strong{font-weight:500}
.method-selector>a[aria-selected="true"]::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--ink)}
.method-selector>a:hover{color:var(--ink)}
.calculation{min-width:0;position:relative}
.calculation:not([hidden])+.calculation:not([hidden]){margin-top:32px}
.method-content{min-width:0}
.observable-tabs,.single-observable{display:flex;align-items:center;flex-wrap:wrap;gap:24px;padding:16px 0 0;font-size:14px}
.observable-tabs a{padding:8px 0;min-height:40px;text-decoration:none;border-bottom:1px solid transparent;color:var(--muted)}
.observable-tabs a[aria-selected="true"]{border-color:var(--strong-line);color:var(--ink)}
.observable-tabs a:hover{color:var(--ink)}
.single-observable{padding-block:20px 8px;color:var(--muted)}
.view{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:var(--gutter);align-items:start;scroll-margin-top:120px}
.view:not([hidden])+.view:not([hidden]){border-top:1px solid var(--line);margin-top:48px}
.figure-title{grid-column:1/-1;display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gutter);align-items:end;padding:20px 0 16px}
.figure-heading{grid-column:1/span 6;font-size:20px;line-height:1.3;padding:0;max-width:60ch}
.science-figure{grid-column:1/-1;min-width:0;padding:0}
.chart-context{grid-column:7/span 6;display:flex;justify-content:flex-end;flex-wrap:wrap;gap:4px 16px;font-size:12px;line-height:1.5;color:var(--muted)}
.chart-wrap{width:100%;max-width:840px;margin-inline:auto;padding:16px 0 0}
.plot{display:block;width:100%;height:auto;overflow:visible}
.plot.mobile{display:none}
.plot .plot-bg{fill:var(--sheet)}
.plot text{fill:var(--ink);font-family:var(--font-ui)}
.plot .axis{stroke:var(--stone)}
.plot .grid{stroke:var(--line)}
.plot .curve{stroke:var(--ink)}
.plot .curve.secondary{stroke:var(--muted)}
.plot .point{fill:var(--ink);stroke:var(--sheet)}
.plot .point.secondary{fill:var(--muted)}
.plot .reference{stroke:var(--muted)}
.plot .band{fill:var(--ink);fill-opacity:.12}
.plot .outer-band{fill:var(--ink);fill-opacity:.06}
.plot .band-edge{stroke:var(--muted)}
.legend-row{display:flex;flex-wrap:wrap;gap:12px 22px;padding:16px 0;font-size:13px}
.legend-row>span{display:inline-flex;gap:8px;align-items:center}
.legend-swatch{width:23px;height:0;display:inline-block;border-top:2px solid var(--ink)}
.legend-swatch.secondary{border-top-style:dashed;border-color:var(--muted)}
.legend-swatch.reference{border-top-style:dotted}
.legend-swatch.band,.legend-swatch.outer-band{height:9px;background:var(--ink);opacity:.2;border:0}
.legend-swatch.outer-band{opacity:.1}
.chart-caption{font-size:12px;line-height:1.6;color:var(--muted);padding-top:16px;max-width:90ch}

.example-copy{grid-column:9/span 4;font-size:15px;line-height:1.65;padding-top:0;min-width:0}
.example-copy .text-link{margin-top:16px;font-size:13px}
.reading-facts{display:grid;grid-template-columns:1fr 1fr;gap:24px 16px;border-top:1px solid var(--line);margin:24px 0;padding-top:24px;font-variant-numeric:tabular-nums}
.reading-facts dt{font-size:13px;color:var(--muted);margin-bottom:4px}
.reading-facts dd{font-size:14px;line-height:1.5;overflow-wrap:anywhere}
.text-link{font-size:14px;display:inline-flex;gap:12px;align-items:center}
.data-disclosure{grid-column:1/-1;min-width:0;border-block:1px solid var(--line);margin-top:20px;scroll-margin-top:120px}
summary{list-style:none;display:flex;justify-content:space-between;gap:24px;align-items:center;padding:20px 0;font-size:14px;line-height:1.5}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:22px;font-weight:300;line-height:1;flex:none}
details[open]>summary::after{content:"−"}
.data-body{font-size:15px;line-height:1.65;padding:8px 0 24px}
.data-body>p{max-width:78ch}
.data-body p+p{margin-top:16px}
.example-facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;padding:24px 0;margin:24px 0;border-block:1px solid var(--line);font-size:14px}
.example-facts dt{font-size:13px;color:var(--muted);margin-bottom:8px}
.source-line{font-size:13px;margin-top:16px;color:var(--muted)}
.download-row{display:flex;flex-wrap:wrap;gap:16px 24px;margin:24px 0;font-size:14px}
.table-wrap{max-width:100%;overflow:auto;overscroll-behavior-inline:contain}
table{border-collapse:collapse;min-width:100%;font-size:13px;font-variant-numeric:tabular-nums;white-space:nowrap}
caption{text-align:left;padding:12px 0;font-size:14px;color:var(--muted)}
th,td{text-align:right;padding:12px 16px;border-bottom:1px solid var(--line)}
th{font-weight:500;background:var(--paper)}
th:first-child,td:first-child{text-align:left}
.science-context{margin-top:24px;max-width:90ch;font-size:14px;color:var(--muted)}
.shared-settings{margin-bottom:16px}
.shared-settings summary{font-size:14px;justify-content:flex-start;gap:16px;padding-block:12px}
.shared-settings>p{padding-bottom:16px}
.science-note{font-size:13px;line-height:1.65}
.library-section{padding-bottom:0}
.fields{list-style:none;border-top:1px solid var(--line)}
.fields li{align-items:start;padding:16px 0;border-bottom:1px solid var(--line)}
.fields h3{grid-column:1/span 6;font-size:22px;line-height:1.35;max-width:100%}
.fields p{grid-column:7/span 6;font-size:15px;line-height:1.6;color:var(--muted);max-width:var(--body-measure)}
.fields .planned h3{font-size:18px;color:var(--muted);line-height:1.6}
.mission-section{background:var(--paper);padding-bottom:0}
.workflow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gutter);list-style:none;counter-reset:step;border-block:1px solid var(--line);padding-block:32px 40px}
.workflow li{counter-increment:step;position:relative;padding-right:24px}
.workflow li::before{content:"0" counter(step);font-size:13px;font-variant-numeric:tabular-nums;color:var(--muted)}
.workflow li:not(:last-child)::after{content:"→";position:absolute;right:8px;top:0;color:var(--muted)}
.workflow h3{font-size:24px;margin:24px 0 16px}
.workflow p{font-size:15px;line-height:1.6;max-width:28ch;color:var(--muted)}
.principles{row-gap:32px;margin-top:48px}
.principles-disclosure{border:0;margin:0;grid-column:7/span 6}
.principles-disclosure .principles{display:block;margin:0;padding:0 0 24px}
.principles>div{grid-column:span 6;max-width:var(--body-measure)}
.principles h3{font-size:20px;margin-bottom:12px;letter-spacing:-.015em}
.principles p{font-size:15px;line-height:1.65;color:var(--muted)}
.method-link{margin-top:0;align-self:start;justify-self:start;padding-block:20px;grid-column:1/span 6;font-size:14px}
.workflow-notes{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:var(--gutter);border-bottom:1px solid var(--line)}
.principles-disclosure .principles>div+div{margin-top:24px}
.principles-disclosure summary{gap:16px}
.principles-disclosure .principles h3{font-size:17px;margin-bottom:8px}
.method-link svg{flex:none}
.questions-section{padding-block:var(--section-space) 48px}
.questions-grid>header{grid-column:1/span 6}
.questions-grid header .section-description{max-width:32ch;margin-top:24px}
.faq-list{grid-column:7/span 6;border-top:1px solid var(--line);min-width:0}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{font-size:16px;padding-block:24px;letter-spacing:0}
.faq-list p{font-size:16px;line-height:1.65;color:var(--muted);padding:0 32px 24px 0;max-width:var(--body-measure)}
.acknowledgements{padding-block:0 48px}
.acknowledgements h2{grid-column:1/span 6;font-size:14px;letter-spacing:0;line-height:1.65;color:var(--muted)}
.acknowledgements p{grid-column:7/span 6;font-size:13px;line-height:1.65;color:var(--muted);max-width:65ch}
.site-footer{display:flex;justify-content:space-between;gap:24px;border-top:1px solid var(--line);padding-block:24px 32px;font-size:13px;color:var(--muted)}
.site-footer>div{display:flex;gap:24px;flex-wrap:wrap}
.site-footer a{text-decoration:none}
.site-footer a:hover{text-decoration:underline}
.document-page{padding:64px 0 var(--section-space)}
.document-heading{grid-column:1/span 6;align-self:start;padding-right:24px}
.back-link{grid-column:1/-1;justify-self:start;font-size:14px;display:inline-flex;gap:16px;margin-bottom:32px}
.document-heading h1{font-size:40px;max-width:20ch}
.document-heading>p{font-size:16px;line-height:1.65;color:var(--muted);margin-top:24px;max-width:38ch}
.document-body{grid-column:7/span 6;font-size:16px;line-height:1.75;min-width:0;max-width:66ch}
.document-body h2{font-size:28px;margin:48px 0 24px}
.document-body h2:first-child{margin-top:0}
.document-body h3{font-size:20px;margin:32px 0 16px}
.document-body p+p{margin-top:24px}
.document-body ul,.document-body ol{padding-left:24px;margin-block:24px}
.document-body li+li{margin-top:16px}
.document-body strong{font-weight:500}
.small{font-size:13px}
.button-row{display:flex;gap:24px;align-items:center;flex-wrap:wrap;padding-top:16px}
.spatial-toolbar{display:flex;align-items:center;gap:16px;padding:6px 0;border-block:1px solid var(--line);position:relative}
.spatial-modes,.spatial-camera{display:flex;align-items:center;gap:4px}
.spatial-modes{gap:2px;margin-right:8px;flex-shrink:0}
.spatial-camera{gap:0}
.spatial-toolbar button{display:inline-flex;align-items:center;justify-content:center;min-height:40px;min-width:40px;border:0;border-radius:3px;background:transparent;padding:8px;font-size:12px;line-height:1.4;color:var(--muted)}
.spatial-modes button{min-width:44px;padding-inline:12px}
.spatial-toolbar button[aria-pressed="true"]{background:var(--ink);color:var(--paper)}
.spatial-camera button:hover{background:var(--surface);color:var(--ink)}
.spatial-camera button:first-child,.spatial-camera button:nth-child(2){font-size:12px;line-height:1}
.spatial-key{display:flex;flex:1;flex-wrap:wrap;gap:4px 16px;font-size:12px;margin-right:auto;line-height:1.4}
.spatial-key>span{display:inline-flex;gap:8px;align-items:center}
.spatial-stage{margin:16px auto 0;max-width:840px;min-width:0;position:relative}
.spatial-stage>svg{display:block;width:100%;height:auto;cursor:grab;touch-action:pan-y;overflow:visible}
.spatial-stage,.spatial-stage>svg,.spatial-stage>svg *{-webkit-user-select:none;user-select:none;-webkit-user-drag:none}
.spatial-stage>svg::selection,.spatial-stage>svg *::selection{background:transparent}
.spatial-stage>svg:focus:not(:focus-visible){outline:none}
.spatial-stage>svg.is-dragging{cursor:grabbing}
.spatial-stage text{font:400 16px var(--font-ui);fill:var(--ink);pointer-events:none}
.spatial-stage .space-axis-title{font-size:16px}
.spatial-stage .space-series-label{font-size:14px;font-weight:500}
.space-floor{fill:var(--concrete);fill-opacity:.72;stroke:var(--stone);stroke-width:.8}
.space-wall{fill:var(--paper);fill-opacity:.38;stroke:var(--stone);stroke-width:.65}
.space-grid{stroke:var(--stone);stroke-width:.65;stroke-opacity:.5;stroke-dasharray:2 5}
.space-axis{stroke:var(--ink);stroke-width:1}
.space-back{stroke:var(--stone);stroke-width:.8}
.space-series-plane{fill:none;stroke:var(--stone);stroke-opacity:.3;stroke-width:.65}
.space-secondary{opacity:.7}
[stroke="var(--mg5-blue)"]{stroke-dasharray:6 4}
.spatial-help summary{min-width:40px;min-height:40px;justify-content:center;padding:0;font-size:13px;color:var(--muted);border-radius:3px}
.spatial-help summary:hover{background:var(--surface);color:var(--ink)}
.spatial-help summary::after{content:none}
.spatial-hint{position:absolute;right:0;top:60px;z-index:6;width:min(290px,100%);padding:16px;background:var(--paper);border:1px solid var(--line);border-radius:4px;font-size:12px;line-height:1.6;color:var(--muted);text-align:left;box-shadow:0 8px 24px #0000000a}
.spatial-readout{position:absolute;right:8px;top:32px;z-index:2;max-width:min(330px,calc(100% - 16px));display:flex;flex-direction:column;gap:4px;padding:12px 16px;background:var(--paper);border:1px solid var(--line);font-variant-numeric:tabular-nums;line-height:1.6;font-size:12px;overflow-wrap:anywhere;pointer-events:none}
.spatial-readout strong{font-weight:500;font-size:13px}
.spatial-depth{font-size:12px;line-height:1.6;color:var(--muted);margin:12px 0 18px}
.native-mg5-figure{display:block;width:100%;height:auto;margin-top:20px}
.native-mg5-figure>rect{fill:var(--sheet)}
.native-mg5-figure text{fill:var(--ink)}
.native-mg5-figure [stroke="#009e73"]{stroke:var(--mg5-green)}
.native-mg5-figure [stroke="#0072b2"]{stroke:var(--mg5-blue);stroke-dasharray:6 4}

@media(prefers-reduced-motion:no-preference){
  .hero h1,.hero-description,.hero .signup{animation:arrive .6s both}
  .hero-description{animation-delay:80ms}
  .hero .signup{animation-delay:160ms}
  @keyframes arrive{from{transform:translateY(8px)}to{transform:none}}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
@media(min-width:1600px){.hero{min-height:min(960px,calc(100svh - var(--header-height)))}}
@media(max-width:1023px){
  :root{--page-inset:32px;--section-space:64px}
  .masthead{gap:24px}.masthead nav{gap:24px}
  .hero h1{font-size:64px}.hero-description{font-size:18px}
  .section-intro h2,.questions-grid h2{font-size:32px}.section-description{font-size:16px}
  .method-selector strong{font-size:18px}.method-selector>a>span{font-size:12px}
  .science-figure{grid-column:1/-1;padding-right:0}.example-copy{grid-column:1/-1;font-size:15px;padding-top:16px;max-width:65ch}
  .reading-facts{grid-template-columns:1fr;gap:16px}.fields h3{font-size:24px}.workflow li{padding-right:16px}
  .document-heading h1{font-size:36px}
}
@media(max-width:760px){
  :root{--page-inset:24px;--gutter:16px;--header-height:128px;--section-space:48px}
  .masthead{flex-wrap:wrap;gap:0;padding-block:20px}.wordmark{font-size:25px}.appearance{border:0;padding-left:0;order:1}
  .masthead nav{order:2;width:100%;justify-content:space-between;gap:16px;margin-top:16px}.masthead nav a{padding:4px 0;font-size:14px}
  .hero{min-height:calc(100svh - var(--header-height));padding:48px 0}.hero h1{font-size:56px;max-width:24ch}.hero-label{font-size:13px;margin-bottom:24px}
  .hero-description{font-size:17px;max-width:38ch;margin-block:16px 32px}.explore-link{margin-top:32px}
  .section-intro{display:block;padding-block:48px 32px}.section-description{max-width:54ch;margin-top:24px}
  .section-label{margin-bottom:12px}.section-intro h2,.questions-grid h2{font-size:30px;max-width:28ch}
  .method-selector{gap:0;overflow:auto;overscroll-behavior-inline:contain;grid-template-columns:minmax(44px,1fr) minmax(50px,1fr) minmax(80px,1.3fr) minmax(126px,1.9fr)}
  .method-selector>a{padding:16px 8px}.method-selector strong{font-size:15px}.method-selector>a>span{display:none}
  .view{display:block}.figure-title{display:block;padding-block:20px 16px}.figure-heading{font-size:20px;padding:0}.chart-context{justify-content:flex-start;margin-top:12px}.example-copy{padding-top:16px;font-size:15px}
  .reading-facts{grid-template-columns:1fr 1fr;gap:16px;margin-block:24px}.chart-context{font-size:13px}.example-facts{grid-template-columns:1fr 1fr}
  .fields h3{font-size:22px}.fields p{font-size:15px}.fields .planned h3{font-size:17px}
  .workflow{grid-template-columns:1fr 1fr;gap:32px 16px}.workflow li:nth-child(2)::after{content:none}.workflow h3{margin-top:24px}.workflow p{font-size:14px}
  .principles{margin-top:32px;row-gap:32px}.principles p{font-size:15px}
  .questions-grid{display:block}.questions-grid>header{margin-bottom:32px}.questions-grid header .section-description{max-width:44ch;margin-top:16px}
  .acknowledgements{display:block;padding-bottom:32px}.acknowledgements h2{margin-bottom:16px}.site-footer{flex-wrap:wrap}
  .document-page{padding-block:32px 64px}.document-page article{display:block}.document-heading{margin-bottom:48px;padding-right:0}.document-heading>p{max-width:48ch}.document-body{max-width:66ch}
}
@media(max-width:520px){
  :root{--page-inset:20px}
  .hero{padding-block:24px 40px}.hero h1{font-size:48px;max-width:17ch;margin-bottom:0}.hero-label{font-size:12px;margin-bottom:16px}
  .hero-description{font-size:16px;max-width:31ch;margin-block:16px 28px}.soon{font-size:13px;margin-bottom:12px}
  .notify button{min-height:44px;padding:10px 12px;font-size:13px}.notify input{min-height:44px;font-size:16px}.button-idle>span{margin-left:8px}
  .consent-line{font-size:11px;margin-top:12px;max-width:46ch}.explore-link{margin-top:24px;font-size:13px}
  .fields li{display:block}.fields h3{margin-bottom:12px}.fields p{max-width:45ch}
  .principles{display:block}.principles>div+div{margin-top:24px}.workflow-notes{display:block}.method-link{padding-bottom:0}
  .plot.desktop{display:none}.plot.mobile{display:block}.spatial-toolbar{flex-wrap:wrap}.spatial-key{order:4;flex-basis:100%;padding-bottom:4px}.spatial-modes{margin-right:auto}.spatial-hint{text-align:left}
  .spatial-stage text{font-size:18px}.faq-list p{padding-right:0}.site-footer{display:block}.site-footer>div{margin-top:16px;gap:24px}
}
@media print{
  :root{--paper:#fff;--surface:#fff;--ink:#000;--muted:#333;--page-inset:0px;--section-space:32px}
  .masthead,.appearance,.signup,.explore-link,.method-selector,.observable-tabs,.spatial-toolbar,.spatial-inspect,.spatial-hint{display:none!important}
  .hero{min-height:0;padding:24px 0}.calculation[hidden],.view[hidden]{display:block!important}.view{break-inside:avoid}.science-band,.mission-section{background:#fff}.data-disclosure{display:block}
  a{color:#000}.frame{width:100%}.document-page article{display:block}.document-body{max-width:none}
}


/* R28: one reading axis, from heading through figure to source. */
:root{--content:840px;--body-measure:66ch}
.hero{min-height:clamp(460px,70svh,640px);align-items:flex-start;text-align:left;padding-block:64px}
.hero h1{font-size:clamp(42px,5vw,64px);max-width:20ch;line-height:1.08;text-wrap:initial}
.hero-description{margin:24px 0;max-width:43ch;text-wrap:pretty}
.signup{margin-inline:0}.hero .consent-line{opacity:1;visibility:visible;text-wrap:pretty;margin-inline:0}
.soon{margin:0 0 16px}.explore-link{margin-top:28px}
.section-intro,.fields li,.questions-grid,.acknowledgements,.document-page article,.workflow-notes,.figure-title{display:block}
.section-description,.questions-grid header .section-description{margin-top:16px;max-width:66ch}
.figure-heading{max-width:100%}.chart-context{justify-content:flex-start;margin-top:10px}
.chart-wrap,.spatial-stage{margin-inline:0}
.figure-source,.figure-scope{display:block;margin-top:8px;font-size:13px;line-height:1.65;overflow-wrap:anywhere}
.figure-source{color:var(--muted)}
.chart-caption{font-size:12px;padding-top:12px}
.spatial-toolbar{margin-top:16px;border-bottom:0;padding-block:10px}
.spatial-depth{margin:0 0 12px}.spatial-hint{top:auto;bottom:56px}
.spatial-panel{display:contents}.spatial-stage{margin-top:8px}
.fields li{padding:20px 0}.fields h3{font-size:22px;margin:0}
.workflow{display:block;padding:0;border:0;counter-reset:none}
.workflow li{padding:24px 0;border-top:1px solid var(--line)}
.workflow li::before,.workflow li::after{display:none}
.workflow h3{font-size:22px;margin:0 0 8px}.workflow p{max-width:66ch;font-size:16px}
.advisor-note{font-size:15px;color:var(--muted);margin:8px 0 24px}
.development-note{font-size:12px;color:var(--muted);margin:8px 0 24px}
.workflow-notes .method-link{padding:20px 0}.principles-disclosure{border-top:1px solid var(--line)}
.principles-disclosure .principles>div{max-width:66ch}
.questions-grid>header{margin-bottom:32px}.faq-list p{max-width:66ch}
.acknowledgements h2{margin-bottom:12px}.acknowledgements p{max-width:76ch}
.document-heading{margin-bottom:48px;padding:0}.document-heading h1{max-width:26ch}.document-heading>p{max-width:60ch}
.document-body{max-width:66ch}.site-footer>div{gap:20px}
@media(max-width:760px){
 .hero{min-height:0;padding-block:56px 64px}.hero h1{font-size:48px}.hero-description{margin:20px 0 28px}
 .method-selector{grid-template-columns:1fr 1fr 1.4fr 2.2fr;overflow:visible}
 .method-selector>a{padding-inline:4px}.method-selector strong{font-size:14px}
 .spatial-stage text{font-size:var(--plot-label-size,28px)}.spatial-stage .space-axis-title{font-size:var(--plot-label-size,28px)}.spatial-stage .space-series-label{display:none}
 .spatial-toolbar{gap:8px}.spatial-modes button{padding-inline:10px;font-size:12px}
}
@media(max-width:390px){.hero h1{font-size:41px}.hero-description{font-size:16px}.spatial-key{font-size:11px}.spatial-camera button{min-width:36px;padding-inline:6px}}
@media print{.hero{min-height:0;padding-block:24px}.spatial-stage{display:none!important}.chart-wrap[hidden],.legend-row[hidden]{display:block!important}}

/* Owner correction: a balanced opening, distinct scales and parallel reading blocks. */
:root{--content:960px;--section-space:96px}
.masthead,.site-footer{max-width:1120px}
.appearance[hidden]{display:grid!important;visibility:hidden}
.hero{min-height:clamp(600px,calc(90svh - 88px),780px);align-items:center;text-align:center;padding:80px 0 96px}
.hero h1{font-size:clamp(72px,7.5vw,96px);font-weight:300;letter-spacing:.035em;line-height:1.12;margin-left:.035em;max-width:100%}
.hero-description{font-size:20px;line-height:1.55;max-width:39ch;margin:28px auto 36px;text-wrap:balance}
.signup{margin-inline:auto}.hero .consent-line{margin-inline:auto;text-wrap:balance}
.explore-link{display:none}
.section-intro{padding:88px 0 40px}.science-section .section-intro{padding:56px 0 40px}
.section-intro h2,.questions-grid h2{font-size:40px;line-height:1.16;letter-spacing:-.02em}
.section-description,.questions-grid header .section-description{font-size:18px;line-height:1.6;max-width:58ch;margin-top:18px}
.figure-title{padding-top:28px}.figure-heading{font-size:24px;letter-spacing:-.015em}
.chart-context{font-size:13px;margin-top:8px}
.chart-wrap,.spatial-stage{max-width:none}.chart-caption{font-size:14px;line-height:1.6}
.spatial-depth{font-size:12px}.spatial-toolbar{padding-block:12px}
.fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:36px;border-top:0}
.fields li{padding:28px 0;border-top:1px solid var(--line);border-bottom:0}
.fields h3{font-size:22px;line-height:1.35;letter-spacing:-.01em}
.workflow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px;border-top:1px solid var(--line)}
.workflow li{padding:28px 0 32px;border:0}.workflow h3{font-size:23px;margin-bottom:16px}
.workflow p{font-size:16px;line-height:1.65;max-width:29ch}
.workflow-notes{display:flex;align-items:start;justify-content:space-between;gap:48px}
.workflow-notes .method-link{flex:none}.principles-disclosure{width:50%;border-top:0}
.questions-section{padding-top:96px}.faq-list{margin-top:40px}.faq-list summary{font-size:18px}
.acknowledgements{padding-block:32px 64px}
@media(max-width:760px){
 :root{--section-space:64px}
 .hero{min-height:calc(82svh - var(--header-height));padding:64px 0 72px}
 .hero h1{font-size:64px;letter-spacing:.03em}.hero-description{font-size:18px;max-width:35ch;margin:24px auto 32px}
 .section-intro,.science-section .section-intro{padding:48px 0 32px}
 .section-intro h2,.questions-grid h2{font-size:32px}.section-description{font-size:16px;margin-top:16px}
 .figure-heading{font-size:22px}.figure-title{padding-top:24px}
 .fields{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:24px}.fields h3{font-size:20px}
 .workflow{display:block}.workflow li+li{border-top:1px solid var(--line)}.workflow p{max-width:52ch}
 .workflow-notes{display:block}.principles-disclosure{width:100%;border-top:1px solid var(--line)}
 .questions-section{padding-top:64px}.faq-list summary{font-size:17px}
}
@media(max-width:390px){.observable-tabs{gap:16px;font-size:13px}.hero h1{font-size:58px}.hero-description{font-size:17px;max-width:31ch}.fields{display:block}.fields h3{font-size:21px}}
@media(max-width:760px){:root{--header-height:160px}.masthead nav{display:grid;grid-template-columns:repeat(3,1fr);gap:10px 20px;margin-top:20px}.masthead nav a{text-align:center}.hero{min-height:calc(82svh - 160px)}}