:root{--ink:#101828;--muted:#5d6878;--line:#d8dee8;--paper:#f7f8fa;--white:#fff;--blue:#174ea6;--navy:#09254a;--cyan:#dff3f6;--orange:#c65d21;--green:#18735c;--focus:#ffbf47;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;line-height:1.55}.skip{position:absolute;left:-999px;top:8px;background:#fff;padding:.7rem;z-index:99}.skip:focus{left:8px}.topbar{height:68px;padding:0 clamp(1rem,4vw,4rem);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#fffffff2;position:sticky;top:0;z-index:10}.brand{font-weight:700;text-decoration:none;color:var(--navy);letter-spacing:-.01em}.brand span{display:inline-grid;place-items:center;background:var(--navy);color:#fff;width:34px;height:34px;margin-right:.65rem}.topbar nav{display:flex;gap:1.4rem}.topbar nav a{color:var(--ink);text-decoration:none;font-size:.9rem}.topbar a:hover{text-decoration:underline}.hero{padding:clamp(4rem,9vw,8rem) clamp(1rem,7vw,7rem) 3rem;background:linear-gradient(130deg,#fff 15%,#e9f4f5);border-bottom:1px solid var(--line)}.kicker,.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:.72rem;font-weight:800;color:var(--blue)}h1{font-family:Georgia,Times New Roman,serif;font-size:clamp(2.7rem,6vw,6.3rem);line-height:.98;letter-spacing:-.045em;max-width:1000px;margin:.8rem 0 1.5rem;color:var(--navy)}.lede{font-size:clamp(1.05rem,2vw,1.35rem);max-width:790px;color:#344054}.hero-actions{display:flex;gap:.8rem;flex-wrap:wrap;margin:2rem 0}.button{display:inline-block;padding:.75rem 1rem;border:1px solid var(--navy);color:var(--navy);text-decoration:none;font-weight:700}.button.primary{background:var(--navy);color:#fff}.button:hover{transform:translateY(-1px)}.notice{max-width:920px;border-left:4px solid var(--orange);padding:.8rem 1rem;background:#fff7ed;color:#59351f}.stats{display:grid;grid-template-columns:repeat(4,1fr);background:var(--navy);color:#fff;padding:1.3rem clamp(1rem,7vw,7rem);gap:1rem}.stats article{display:flex;flex-direction:column;border-right:1px solid #365273}.stats article:last-child{border:0}.stats strong{font:700 2.1rem Georgia,serif}.stats span{color:#cbd5e1;font-size:.82rem}.section{padding:clamp(3.5rem,7vw,7rem) clamp(1rem,7vw,7rem)}.section.shade{background:#eaf0f5}.section-head{display:flex;justify-content:space-between;align-items:end;gap:2rem;margin-bottom:2rem}.section-head h2,.method h2{font:700 clamp(2rem,4vw,3.8rem)/1.05 Georgia,serif;color:var(--navy);margin:.4rem 0}.section-head p{max-width:430px;color:var(--muted)}.filters{display:flex;gap:1rem;flex-wrap:wrap;background:#fff;padding:1rem;border:1px solid var(--line)}label{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;display:flex;flex-direction:column;gap:.35rem}input,select{font:inherit;text-transform:none;letter-spacing:0;min-width:220px;border:1px solid #98a2b3;padding:.6rem;background:#fff;color:var(--ink)}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.result{color:var(--muted);font-size:.9rem}.table-wrap{overflow:auto;border:1px solid var(--line);background:#fff}table{width:100%;border-collapse:collapse;min-width:850px}th,td{text-align:left;padding:.8rem .9rem;border-bottom:1px solid var(--line);vertical-align:top}th{position:sticky;top:0;background:#eef2f6;font-size:.72rem;text-transform:uppercase;letter-spacing:.06em}td{font-size:.88rem}td:first-child{font-weight:800;color:var(--navy)}.pill{display:inline-block;border-radius:999px;padding:.18rem .55rem;background:#e8eef7;font-size:.72rem;white-space:nowrap}.pill.operational{background:#d8f3e8;color:#145c49}.pill.offline{background:#fee2e2;color:#991b1b}.pill.commissioning{background:#ede9fe;color:#5b21b6}.pill.planned,.pill.legacy{background:#e5e7eb;color:#374151}.context-key{display:flex;gap:1.2rem;flex-wrap:wrap;margin-bottom:1.5rem;font-size:.84rem}.context-key i{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:.35rem}.goal{background:#64748b}.cal{background:#c65d21}.sky{background:#174ea6}.claim-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.claim{background:#fff;border:1px solid #cbd5e1;border-top:4px solid var(--blue);padding:1rem}.claim.requirement{border-top-color:#64748b}.claim.calibration{border-top-color:var(--orange)}.claim header{display:flex;justify-content:space-between;gap:1rem}.claim h3{margin:0;color:var(--navy)}.claim .value{font:700 1.35rem Georgia,serif;white-space:nowrap}.claim .context{color:var(--muted);font-size:.83rem}.claim details{margin-top:.8rem;border-top:1px solid var(--line);padding-top:.7rem}.claim summary{cursor:pointer;font-weight:700;color:var(--blue)}.claim dl{display:grid;grid-template-columns:90px 1fr;gap:.35rem;margin:.8rem 0;font-size:.82rem}.claim dt{font-weight:700}.claim dd{margin:0}.claim a{color:var(--blue)}.barrier-grid{counter-reset:item;list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.barrier-grid li{counter-increment:item;background:#fff;padding:1.3rem;min-height:150px}.barrier-grid li:before{content:counter(item,decimal-leading-zero);display:block;color:var(--orange);font:700 1.25rem Georgia,serif}.barrier-grid b,.barrier-grid span{display:block}.barrier-grid b{margin:.5rem 0}.barrier-grid span{color:var(--muted);font-size:.9rem}.method{display:grid;grid-template-columns:1.4fr 1fr;gap:4rem;background:var(--navy);color:#fff}.method h2{color:#fff}.method .eyebrow{color:#8fd3dd}.method-links{display:grid;align-content:center}.method-links a{color:#fff;text-decoration:none;padding:.9rem 0;border-bottom:1px solid #47617f}.method-links a:after{content:" →"}footer{padding:2rem clamp(1rem,7vw,7rem);display:flex;justify-content:space-between;gap:2rem;color:var(--muted);font-size:.8rem;background:#fff}@media(max-width:900px){.topbar nav{display:none}.stats{grid-template-columns:repeat(2,1fr)}.stats article:nth-child(2){border-right:0}.claim-grid,.barrier-grid{grid-template-columns:repeat(2,1fr)}.method{grid-template-columns:1fr}.section-head{display:block}}@media(max-width:580px){.claim-grid,.barrier-grid,.stats{grid-template-columns:1fr}.stats article{border-right:0;border-bottom:1px solid #365273;padding-bottom:.7rem}.section{padding:3rem 1rem}footer{display:block}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}.census-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.census-card{display:flex;flex-direction:column;min-width:0;padding:1.1rem;background:var(--white);border:1px solid var(--line);border-top:3px solid var(--navy)}.card-top{display:flex;justify-content:space-between;align-items:start;gap:.6rem}.tier,.verification{font-size:.7rem;line-height:1.3}.tier{color:var(--blue);font-weight:800}.verification{border-radius:999px;padding:.2rem .5rem;background:#fff1d6;color:#704311;white-space:nowrap}.verification.verified{background:#d8f3e8;color:#145c49}.census-card h3{font:700 1.55rem Georgia,serif;color:var(--navy);margin:1rem 0 .2rem}.census-card>p{color:var(--muted);margin:.2rem 0 1rem}.census-card dl{display:grid;grid-template-columns:64px 1fr;gap:.25rem;margin:auto 0 1rem;font-size:.82rem}.census-card dt{font-weight:800}.census-card dd{margin:0;overflow-wrap:anywhere}.census-card button,.dialog-head button{min-height:44px;border:1px solid var(--navy);background:var(--white);color:var(--navy);font-weight:800;cursor:pointer;transition:background .18s,color .18s}.census-card button:hover,.dialog-head button:hover{background:var(--navy);color:#fff}.scope-line{max-width:72ch;color:var(--muted);font-size:.88rem;margin-top:1.2rem}dialog{width:min(800px,calc(100% - 2rem));max-height:90vh;border:0;padding:0;box-shadow:0 24px 80px #09254a4d;color:var(--ink)}dialog::backdrop{background:#051428ad}.dialog-head{position:sticky;top:0;display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;background:#fff;border-bottom:1px solid var(--line);z-index:1}.dialog-head button{padding:.55rem 1rem}#dialog-content{padding:1rem 1.5rem 2rem}#dialog-content h2{font:700 clamp(2.3rem,6vw,4.5rem)/1 Georgia,serif;color:var(--navy);margin:.5rem 0}.profile-name{font-size:1.15rem;color:var(--muted);max-width:65ch}.profile-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin:1.5rem 0}.profile-meta div{background:#f8fafc;padding:.9rem}.profile-meta span,.profile-meta b{display:block}.profile-meta span{text-transform:uppercase;letter-spacing:.08em;font-size:.67rem;color:var(--muted)}.profile-meta b{margin-top:.25rem;overflow-wrap:anywhere}#dialog-content section{margin-top:1.7rem}#dialog-content h3{font:700 1.3rem Georgia,serif;color:var(--navy)}.profile-warning{border-left:4px solid var(--orange);padding:.2rem 1rem;background:#fff7ed}.profile-claim{padding:1rem;border:1px solid var(--line);margin:.7rem 0}.profile-claim p{margin:.45rem 0}.source-links{display:flex;flex-wrap:wrap;gap:.6rem}.source-links a{display:inline-flex;align-items:center;min-height:44px;padding:.55rem .75rem;border:1px solid #8aa4c6;color:var(--blue);text-decoration:none;background:#fff;overflow-wrap:anywhere}.source-links a:hover{text-decoration:underline}.barrier-articles{display:grid;gap:1rem}.barrier-article{border:1px solid var(--line);background:#fff}.barrier-article>header{display:grid;grid-template-columns:70px 1fr;gap:1rem;padding:1.3rem;border-bottom:1px solid var(--line)}.barrier-article>header>span{font:700 2rem Georgia,serif;color:var(--orange)}.barrier-article h3{font:700 clamp(1.5rem,3vw,2.4rem)/1.1 Georgia,serif;color:var(--navy);margin:0}.barrier-article header p{margin:.35rem 0 0;color:var(--muted)}.barrier-body{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;padding:1.3rem}.barrier-body h4{text-transform:uppercase;letter-spacing:.08em;font-size:.72rem;color:var(--blue);margin:0}.barrier-body p{font-size:.9rem}.barrier-body .source-links{grid-column:1/-1}.figure-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.2rem}.figure-grid figure{margin:0;background:#fff;border:1px solid var(--line);padding:1rem}.figure-grid img{display:block;width:100%;height:auto}.figure-grid figcaption{margin-top:.8rem;color:var(--muted);font-size:.85rem}@media(max-width:1000px){.census-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.barrier-body{grid-template-columns:1fr}.barrier-body .source-links{grid-column:auto}}@media(max-width:680px){.census-grid,.figure-grid,.profile-meta{grid-template-columns:1fr}.barrier-article>header{grid-template-columns:44px 1fr}.filters label,.filters input,.filters select{width:100%;min-width:0}input,select{font-size:16px}}dialog{width:min(1120px,calc(100% - 2rem))}.depth{display:inline-block;align-self:flex-start;font-size:.7rem;font-weight:800;padding:.28rem .5rem;margin:.2rem 0 1rem;background:#edf2f7;color:#334155}.depth.full{background:#dff3f6;color:#0c4a57}.depth.quantitative{background:#e8eef7;color:#174ea6}.featured-dossier>div{display:block}.featured-dossier header{max-width:850px;margin-bottom:2rem}.featured-dossier h2{font:700 clamp(2.2rem,4vw,4.2rem)/1.04 Georgia,serif;color:var(--navy);margin:.5rem 0 1rem}.dossier-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.dossier-index article{display:flex;flex-direction:column;align-items:flex-start;padding:1.4rem;background:#fff;border:1px solid var(--line)}.dossier-index article>span{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:var(--blue)}.dossier-index h3{font:700 1.45rem/1.2 Georgia,serif;color:var(--navy);margin:.55rem 0}.dossier-index p{flex:1}.featured-dossier button{font:inherit;cursor:pointer}.dossier-block{border-top:4px solid var(--blue);padding-top:1.2rem}.dossier-label{text-transform:uppercase;letter-spacing:.09em;font-size:.7rem;font-weight:800;color:var(--blue)}.reading-boundary{padding:.8rem 1rem;border-left:4px solid var(--orange);background:#fff7ed}.dossier-block h4{font:700 1.15rem Georgia,serif;color:var(--navy);margin:1.5rem 0 .4rem}.dossier-block ol{padding-left:1.25rem}.dossier-block li{margin:.55rem 0}.paper-list{display:grid;gap:.7rem}.paper-list article{display:grid;grid-template-columns:1fr auto;gap:1rem;padding:1rem;border:1px solid var(--line);background:#fafbfc}.paper-list span{font-size:.7rem;font-weight:800;text-transform:uppercase;letter-spacing:.07em;color:var(--blue)}.paper-list h5{font:700 1.05rem Georgia,serif;margin:.35rem 0}.paper-list p{font-size:.84rem;margin:.3rem 0}.paper-list a{align-self:start;white-space:nowrap;color:var(--blue)}.project-note{margin-top:1.7rem;padding:1.2rem;background:#eef7f8;border:1px solid #b9dce1}.project-note blockquote{margin:1rem 0 0;padding:1rem;border-left:4px solid var(--green);background:#fff;font-family:Georgia,serif;font-size:1.05rem}#current-focus-card .dossier-index{grid-template-columns:1fr}.research-note{max-width:920px;margin:2rem 0 0;padding:1.25rem 1.4rem;border:1px solid #b8cad5;border-left:4px solid var(--blue);background:#ffffffd1}.research-note h2{margin:.35rem 0 .75rem;font:700 clamp(1.35rem,2.2vw,1.8rem)/1.2 Georgia,serif;color:var(--navy)}.research-note p{max-width:75ch;margin:.55rem 0;color:#344054}.featured-dossier header>p{max-width:78ch}@media(max-width:900px){.dossier-index{grid-template-columns:1fr}.paper-list article{grid-template-columns:1fr}.paper-list a{white-space:normal}}.learn-section{background:#fff}.measurement-flow{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border:1px solid var(--line);background:var(--line);gap:1px}.measurement-flow article{position:relative;background:#fff;padding:1.2rem;min-width:0}.measurement-flow article>span{font:700 1.35rem Georgia,serif;color:var(--orange)}.measurement-flow h3{font:700 1.2rem/1.15 Georgia,serif;color:var(--navy);margin:.55rem 0}.measurement-flow p{font-size:.86rem}.measurement-flow details{border-top:1px solid var(--line);padding-top:.6rem;margin-top:.8rem}.measurement-flow summary{color:var(--blue);font-weight:800;font-size:.78rem;cursor:pointer}.measurement-flow a,.technique-grid a,.comparator-grid a,.chapter-link a{color:var(--blue)}.equation-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:1.5rem 0 4rem}.equation-grid article{background:var(--navy);color:#fff;padding:1.2rem}.equation-grid span{display:block;color:#9bd5dc;text-transform:uppercase;letter-spacing:.08em;font-size:.7rem;font-weight:800}.equation-grid strong{display:block;font:700 1.3rem Georgia,serif;margin:.7rem 0}.equation-grid p{color:#d8e4f0;font-size:.84rem}.section-subhead{margin:2rem 0 1rem}.section-subhead h3,.taxonomy-panel h3{font:700 clamp(1.7rem,3vw,2.8rem)/1.1 Georgia,serif;color:var(--navy);margin:.4rem 0}.technique-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.technique-grid article{padding:1.2rem;border:1px solid var(--line);background:#f8fafc}.technique-grid h4,.comparator-grid h4{font:700 1.25rem Georgia,serif;color:var(--navy);margin:0 0 .8rem}.technique-grid dl{font-size:.84rem;margin:0}.technique-grid dt{font-weight:800;color:var(--blue);margin-top:.65rem}.technique-grid dd{margin:0}.taxonomy-panel{margin-top:4rem;padding:clamp(1.2rem,3vw,2.3rem);background:#eaf0f5;border-top:4px solid var(--navy)}.taxonomy-table{min-width:760px}.scope-badge{display:inline-block;padding:.2rem .5rem;border-radius:999px;font-size:.72rem;font-weight:800}.scope-badge.inside{background:#d8f3e8;color:#145c49}.scope-badge.outside{background:#fff1d6;color:#704311}.comparator-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;margin-top:1rem}.comparator-grid article{background:#fff;padding:1.1rem;border:1px solid var(--line)}.comparator-grid article>span{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;font-weight:800;color:var(--orange)}.chapter-link{margin-top:1.4rem;font-weight:800}@media(max-width:1100px){.measurement-flow{grid-template-columns:repeat(2,minmax(0,1fr))}.measurement-flow article:last-child{grid-column:1/-1}.technique-grid{grid-template-columns:1fr}}@media(max-width:700px){.measurement-flow,.equation-grid,.comparator-grid{grid-template-columns:1fr}.measurement-flow article:last-child{grid-column:auto}}.world-map{position:relative;aspect-ratio:2/1;overflow:hidden;border:1px solid #7892ae;background-color:#dcecf0;background-image:radial-gradient(ellipse at 23% 38%,#d9dfd2 0 12%,transparent 12.4%),radial-gradient(ellipse at 32% 65%,#d9dfd2 0 9%,transparent 9.4%),radial-gradient(ellipse at 57% 39%,#d9dfd2 0 18%,transparent 18.4%),radial-gradient(ellipse at 71% 62%,#d9dfd2 0 8%,transparent 8.4%),linear-gradient(to right,transparent 24.8%,rgba(9,37,74,.12) 25%,transparent 25.2%,transparent 49.8%,rgba(9,37,74,.12) 50%,transparent 50.2%,transparent 74.8%,rgba(9,37,74,.12) 75%,transparent 75.2%),linear-gradient(to bottom,transparent 24.8%,rgba(9,37,74,.12) 25%,transparent 25.2%,transparent 49.8%,rgba(9,37,74,.12) 50%,transparent 50.2%,transparent 74.8%,rgba(9,37,74,.12) 75%,transparent 75.2%)}.map-equator,.map-meridian{position:absolute;background:#09254a4d;pointer-events:none}.map-equator{left:0;right:0;top:50%;height:1px}.map-meridian{top:0;bottom:0;left:50%;width:1px}.map-marker{position:absolute;transform:translate(-50%,-50%);display:grid;place-items:center;width:30px;height:30px;border-radius:50%;border:2px solid #fff;background:var(--orange);color:#fff;box-shadow:0 1px 7px #09254a8c;cursor:pointer;font-weight:800}.map-marker:hover,.map-marker:focus-visible{z-index:2;background:var(--navy);transform:translate(-50%,-50%) scale(1.16)}.map-label{position:absolute;font-size:.65rem;color:#48627b;background:#ffffffbf;padding:.1rem .25rem}.map-label.north{top:4px;left:4px}.map-label.south{bottom:4px;left:4px}.map-label.west{bottom:4px;left:42%}.map-label.east{bottom:4px;right:4px}.map-sites{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:1rem}.map-sites article{display:flex;flex-direction:column;background:#fff;padding:.75rem;font-size:.78rem}.map-sites span{color:var(--muted)}.map-sites a{color:var(--blue);margin-top:.35rem}.evidence-checks{display:flex;flex-wrap:wrap;gap:.3rem;margin-bottom:.75rem}.evidence-checks span{font-size:.65rem;font-weight:800;border-radius:999px;padding:.2rem .45rem}.evidence-checks .checked{background:#d8f3e8;color:#145c49}.evidence-checks .open{background:#fff1d6;color:#704311}@media(max-width:900px){.map-sites{grid-template-columns:repeat(2,1fr)}}@media(max-width:580px){.map-sites{grid-template-columns:1fr}.world-map{aspect-ratio:1.35/1}.map-marker{width:26px;height:26px;font-size:.72rem}}.display-equation{display:block;font:700 clamp(1.35rem,2.2vw,2rem) Georgia,serif;margin:.9rem 0;color:#fff;overflow-x:auto}.display-equation math{font-size:1.15em}.equation-grid strong{display:none}.world-map{background-color:#dcecf0;background-image:linear-gradient(to right,transparent 24.8%,rgba(9,37,74,.12) 25%,transparent 25.2%,transparent 49.8%,rgba(9,37,74,.12) 50%,transparent 50.2%,transparent 74.8%,rgba(9,37,74,.12) 75%,transparent 75.2%),linear-gradient(to bottom,transparent 24.8%,rgba(9,37,74,.12) 25%,transparent 25.2%,transparent 49.8%,rgba(9,37,74,.12) 50%,transparent 50.2%,transparent 74.8%,rgba(9,37,74,.12) 75%,transparent 75.2%)}.map-land{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;pointer-events:none}.map-land path{fill:#d4ddce;stroke:#7b927b;stroke-width:1.4;vector-effect:non-scaling-stroke}.map-legend{display:flex;flex-wrap:wrap;gap:1.2rem;margin:.8rem 0;color:var(--muted);font-size:.78rem}.map-legend span{display:flex;align-items:center;gap:.4rem}.ground-dot{width:13px;height:13px;border-radius:50%;background:var(--orange);border:2px solid #fff;box-shadow:0 0 0 1px var(--orange)}.space-symbol{color:var(--blue);font-style:normal}.figure-grid figure.wide{grid-column:1/-1}.figure-grid figure.wide img{max-height:760px;object-fit:contain}@media(max-width:580px){.map-marker{width:24px;height:24px;font-size:.68rem}}.display-equation{overflow:visible;line-height:1.2}.display-equation math{font-size:1.08em}.world-map{background:#dcecf0;background-image:none}.map-land .map-sphere{fill:#dcecf0;stroke:#7892ae;stroke-width:1.2;vector-effect:non-scaling-stroke}.map-land .map-graticule{fill:none;stroke:#87a8be;stroke-width:.55;stroke-opacity:.48}.map-land .map-countries{fill:#d4ddce;stroke:none}.map-land .map-borders{fill:none;stroke:#758a75;stroke-width:.75;stroke-opacity:.9}.map-credit{max-width:78ch;margin:.7rem 0 1rem;color:var(--muted);font-size:.76rem;line-height:1.55}.map-credit a{color:var(--blue)}.map-label.west{left:42px}@media(max-width:580px){.world-map{aspect-ratio:2/1}}