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@media(max-width:1200px){.page-shell{grid-template-columns:186px minmax(0,1fr)}.sidebar{padding-left:20px;padding-right:12px}.sidebar nav a{font-size:11px;gap:9px}.hero{padding:36px 32px 0}.content{padding:0 32px}.hero-grid{gap:15px}.hero h1{font-size:40px}.hero-intro{font-size:16px}.hero-detail{font-size:12px}.hero-bottom{gap:15px}.hero-bottom a{white-space:normal;width:95px;flex-shrink:0}.panel{padding:20px}.projection-lab{grid-template-columns:250px minmax(0,1fr)}.projection-copy{padding:23px}.projection-stage{padding:19px}.case-grid{grid-template-columns:repeat(3,1fr)}.case-card:nth-child(4),.case-card:nth-child(5){grid-column:auto}.case-card p{font-size:12px}.step-tabs button{font-size:10px}.step-tabs button span{margin-right:3px}.step-content{gap:24px;padding:25px}.step-content h3{font-size:24px}.output-block{padding:24px;gap:24px}.status-list>div{grid-template-columns:100px 1fr;gap:8px}.convention-strip{gap:12px}.convention-strip>div+div{padding-left:12px}.convention-strip strong{font-size:11px}.review-tag{display:none}.overlay-warning{gap:25px}.overlay-warning h3{font-size:25px}}
@media(max-width:960px){.document-tag{display:none}.print-button{margin-left:auto}.page-shell{display:block}.sidebar{position:sticky;top:72px;z-index:15;padding:0 20px;background:var(--paper);height:auto;border-bottom:1px solid var(--line);overflow-x:auto}.sidebar-label,.sidebar-note,.source-home{display:none}.sidebar nav{flex-direction:row;gap:10px;min-width:max-content}.sidebar nav a{padding:13px 8px;border-left:0;border-bottom:2px solid transparent}.sidebar nav a.active{padding-left:8px;border-bottom-color:var(--green);background:none}.sidebar nav a span{display:none}main{border:0}.hero h1{font-size:46px}.hero{padding:38px 36px 0}.content{padding:0 36px}html{scroll-padding-top:142px}.case-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px}.case-card{padding:12px}.case-card h3{font-size:14px}.case-card p{font-size:10px}.case-card strong{font-size:9px}.section-heading h2{font-size:38px}.topbar{padding:0 25px}.hero-bottom a{width:auto}.step-tabs button{font-size:11px}.step-content h3{font-size:25px}}
@media(max-width:720px){.topbar{height:60px;padding:0 18px;gap:15px}.wordmark{font-size:9px;gap:7px;letter-spacing:.06em}.wordmark .brand-icon{width:15px;height:15px;border-width:4px}.print-button{font-size:10px;padding:5px 8px}.print-button span{display:none}.sidebar{top:60px;padding:0 10px}.sidebar nav{gap:1px}.sidebar nav a{font-size:10px;padding:11px 9px}.sidebar nav a.active{padding-left:9px}html{scroll-padding-top:120px}.hero{padding:32px 23px 0}.hero-grid{grid-template-columns:1fr;gap:22px}.hero h1{font-size:44px;max-width:550px}.hero-intro{font-size:17px;max-width:550px;margin-top:23px}.hero-detail{font-size:13px}.hero-figure{max-width:440px;margin:0 auto;width:100%}.hero-bottom{margin-top:26px;display:block;padding:20px 0 24px}.hero-bottom p{font-size:11px}.hero-bottom a{display:inline-block;margin-top:12px}.content{padding:0 23px}.scope-note{grid-template-columns:1fr;gap:8px;padding:24px 0}.scope-note p{font-size:12px}.section{padding:43px 0}.section-heading{margin-bottom:25px}.section-heading h2{font-size:34px}.section-heading>p{font-size:14px;margin-top:16px}.two-col,.fit-details,.scene-callout,.output-block,.overlay-warning{grid-template-columns:1fr;gap:23px}.panel{padding:23px}.geometry-pair>article{overflow:hidden}.ray-diagram,.dimension-diagram{max-height:235px}.convention-strip{grid-template-columns:1fr 1fr;gap:18px;padding:20px 0}.convention-strip>div+div{border:0;padding-left:0}.convention-strip>div:nth-child(even){border-left:1px solid var(--line);padding-left:18px}.convention-strip strong{font-size:12px}.projection-lab{grid-template-columns:1fr}.projection-copy{border-right:0;border-bottom:1px solid var(--line);padding:24px}.projection-copy h3 br{display:none}.projection-copy h3{font-size:26px}.projection-copy p{max-width:560px}.control{margin-top:20px}.projection-copy button{margin:13px 0 12px}.projection-stage{padding:17px}.projection-stage figcaption{font-size:9px}.step-tabs{display:flex;overflow-x:auto}.step-tabs button{flex:1 0 116px;font-size:10px;padding:14px 8px}.step-content{grid-template-columns:1fr;padding:22px;gap:20px}.step-content figure{max-width:430px;width:100%;margin:auto}.step-content figure svg{max-height:245px}.step-content h3{font-size:25px}.step-content p{margin-top:12px}.step-takeaway{margin-top:15px}.step-actions{margin-top:20px}.fit-details{margin-top:28px}.scene-callout{padding:24px;margin-top:25px}.scene-callout h3{font-size:25px}.case-grid{grid-template-columns:1fr 1fr;gap:14px}.case-card{padding:17px}.case-card h3{font-size:19px}.case-card p{font-size:12px}.case-card strong{font-size:11px}.case-card:last-child{grid-column:span 2;display:grid;grid-template-columns:145px 1fr;column-gap:18px}.case-card:last-child svg{grid-column:1;grid-row:1 / 5;align-self:center;margin:0}.case-card:last-child .case-number,.case-card:last-child h3,.case-card:last-child p,.case-card:last-child strong{grid-column:2}.case-legend{gap:10px 19px;font-size:10px}.case-legend .micro{width:100%}.timeline-row{grid-template-columns:1fr 1fr}.time-cell{padding:19px}.time-cell:nth-child(2){border-right:0}.time-cell:nth-child(-n+2){border-bottom:1px solid var(--line)}.time-cell:nth-child(2):after{display:none}.time-cell>span{font-size:10px}.time-cell p{font-size:11px}.channel-grid{grid-template-columns:1fr;gap:22px}.channel-grid h3{font-size:12px}.channel-grid p{font-size:12px;max-width:560px}.output-block{padding:24px}.output-block h3{font-size:25px}.status-list>div{grid-template-columns:112px 1fr;gap:13px;padding:13px 0}.headline-metrics{gap:13px}.headline-metrics article{padding-right:13px}.headline-metrics strong{font-size:35px}.headline-metrics strong span{font-size:16px}.headline-metrics h3{font-size:11px;margin-top:10px}.headline-metrics p{font-size:10px}.evidence-table{min-width:620px;font-size:11px}.evidence-table th,.evidence-table td{padding:13px}.overlay-warning{padding:24px}.overlay-warning h3{font-size:28px}.evidence-details{gap:25px}.review-list li{gap:15px;padding:21px 0}.review-list h3{font-size:18px}.review-list p{font-size:12px}.closing-card{padding:23px;gap:16px;flex-wrap:wrap}.closing-card p{flex:1;font-size:11px;min-width:190px}.closing-card strong{font-size:12px}.closing-card a{margin-left:43px}footer{font-size:9px;display:block}footer>span{display:block}footer>span+span{margin-top:6px}}
@media(max-width:390px){.wordmark{font-size:8px}.hero h1{font-size:37px}.hero,.content{padding-left:18px;padding-right:18px}.section-heading h2{font-size:30px}.case-card{padding:13px}.case-card:last-child{grid-template-columns:110px 1fr}.case-card h3{font-size:16px}.case-card p{font-size:11px}.headline-metrics strong{font-size:30px}.headline-metrics strong span{font-size:14px}.print-button{font-size:9px;padding:5px}.panel{padding:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{@page{size:A4;margin:14mm}body{background:white;font-size:10pt;color:#16251c}.topbar,.sidebar,.print-button,.step-actions,.step-tabs,.projection-copy button,.skip-link{display:none!important}.page-shell{display:block;max-width:none}main{border:0}.hero{background:#143d3d!important;padding:24px;color:white;print-color-adjust:exact;-webkit-print-color-adjust:exact}.hero-grid{grid-template-columns:1.1fr 1fr;gap:20px}.hero h1{font-size:30pt}.hero-intro{font-size:11pt;margin-top:16px}.hero-detail{font-size:9pt}.hero-bottom{margin-top:20px;padding-bottom:0}.hero-bottom p{font-size:8pt}.content{padding:0}.section{padding:27px 0;break-inside:auto}.section-heading h2{font-size:24pt}.section-heading p{font-size:10pt}.two-col{grid-template-columns:1fr 1fr;gap:15px}.panel{padding:15px;break-inside:avoid}.panel p,.fit-details p,.scene-callout p,.output-block p,.evidence-details p,.review-list p{font-size:9pt}.panel h3{font-size:14pt}.case-grid{grid-template-columns:repeat(5,1fr);gap:8px;break-inside:avoid}.case-card{padding:9px}.case-card h3{font-size:10pt}.case-card p,.case-card strong{font-size:7pt}.case-card:last-child{display:block;grid-column:auto}.projection-lab{grid-template-columns:220px 1fr;break-inside:avoid}.projection-copy{padding:18px}.projection-copy h3{font-size:17pt}.projection-copy p{font-size:8pt}.control{margin-top:12px}.control input{display:none}.projection-stage{padding:13px}.step-content{grid-template-columns:1fr 1fr;padding:20px;gap:20px}.step-content p{font-size:9pt}.step-content h3{font-size:18pt}.fit-details,.scene-callout,.output-block,.overlay-warning{grid-template-columns:1fr 1fr;gap:20px}.timeline-row{grid-template-columns:repeat(4,1fr)}.timeline-figure,.output-block,.overlay-warning,.convention-strip,.headline-metrics,.closing-card{break-inside:avoid}.time-cell{padding:12px}.channel-grid{grid-template-columns:repeat(3,1fr)}.channel-grid h3{font-size:8pt}.channel-grid p{font-size:8pt}.headline-metrics strong{font-size:30pt}.headline-metrics h3{font-size:9pt}.evidence-table{font-size:8pt;min-width:0}.evidence-table th,.evidence-table td{padding:10px}.evidence-table-wrap{overflow:visible}.review-list li{break-inside:avoid;padding:17px 0}.review-list h3{font-size:12pt}.review-tag{display:none}.receipt-details{display:none}footer{font-size:7pt}.closing-card{background:#e8eee4;color:#244432;print-color-adjust:exact;-webkit-print-color-adjust:exact}.closing-card strong,.closing-card a{color:#244432}a{color:#395e4e;text-decoration:underline}.hero a{color:#d2e6d9}.hero svg text{fill:#bdd1ca}.section{scroll-margin:0}p,li{orphans:3;widows:3}}

.frozen-examples{background:#ecf0e5;border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:30px}.example-heading{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:22px}.example-heading .figure-label{margin-bottom:9px}.example-heading h3{font-size:23px}.example-buttons{display:flex;gap:5px;flex-shrink:0}.example-buttons button{border:1px solid #c1ceba;background:transparent;border-radius:3px;font-size:10px;padding:7px 10px;color:var(--muted);white-space:nowrap}.example-buttons button[aria-pressed=true]{background:var(--green);color:#fff;border-color:var(--green)}.example-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px}.example-pair img{width:100%;height:auto;display:block;border:1px solid #d1dac9;border-radius:3px;background:#101910}.example-pair figcaption{display:flex;justify-content:space-between;font-size:10px;color:var(--ink);margin-top:7px;font-weight:650}.example-pair figcaption span{color:var(--muted);font-weight:400;font-size:9px}.example-description{margin-top:20px}.example-description strong{font-size:12px}.example-description p{font-size:12px;color:var(--muted);margin-top:7px}.example-provenance{font-size:9px;color:var(--muted);line-height:1.8;border-top:1px solid #d4dec9;padding-top:12px;margin-top:16px}.example-provenance a{white-space:nowrap}
@media(max-width:1200px){.example-heading{display:block}.example-buttons{margin-top:16px}}
@media(max-width:720px){.frozen-examples{padding:19px}.example-heading h3{font-size:22px}.example-pair{grid-template-columns:1fr;gap:18px}.example-pair figcaption{font-size:11px}.example-description strong{font-size:11px}.example-description p{font-size:11px}.example-provenance{font-size:9px}}
@media print{.frozen-examples{padding:15px;break-inside:avoid}.example-heading h3{font-size:15pt}.example-buttons{display:none}.example-pair{grid-template-columns:1fr 1fr;gap:12px}.example-description p{font-size:8pt}.example-provenance{font-size:7pt}}

.print-walkthrough{display:none}
@media print{.stepper{display:none}.print-walkthrough{display:block}.print-walkthrough article{break-inside:avoid;margin:16px 0}.print-walkthrough h3{font-size:12pt}.print-walkthrough p{font-size:9pt;color:#4a6050;margin-top:7px}}

/* Whole-stack overview: retain the original palette, type, panels and spacing. */
.repository-button,.selsus-home-button{border:1px solid #c7d0c1;border-radius:4px;padding:7px 12px;font-size:11px;color:var(--ink);text-decoration:none;white-space:nowrap;min-height:36px;display:inline-flex;align-items:center;gap:10px}.selsus-home-button{margin-left:0}
.wordmark{min-width:0}.wordmark-subtitle{font-size:.9em}.wordmark .divider{margin:0 6px}
.hero h1{font-size:clamp(34px,3.35vw,54px)}.hero-figure{padding-bottom:20px}.hero-chips{flex-wrap:wrap}
.geometry-correction{border-left:2px solid var(--amber);padding-left:13px;font-size:12px!important}
.convention-strip small a{font-size:inherit}.convention-strip small{line-height:1.7}
.projection-lab{grid-template-columns:minmax(300px,.85fr) minmax(0,1.15fr)}
.projection-copy{padding:27px}.projection-copy>p{font-size:12px}.pose-controls{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px;margin:22px 0 8px}.pose-controls .control{margin:0;min-width:0}.pose-controls label{font-size:11px;flex-wrap:wrap;gap:0 8px}.pose-controls output{white-space:nowrap}.pose-controls input{width:100%;height:32px;margin:0;accent-color:var(--green)}
.projection-stage{align-self:center;min-width:0}.projection-stage svg{overflow:hidden}.projection-stage figcaption{flex-wrap:wrap;gap:8px;font-size:10px}
#randomize-projection{min-height:40px}.flight-diagram{margin:20px auto;max-height:220px}
.control-table{margin-top:28px}.control-table .evidence-table th,.control-table .evidence-table td{width:auto}.control-table .evidence-table tbody th{width:23%}
.gallery-intro{font-size:12px;color:var(--muted);margin-bottom:18px;max-width:650px}.example-buttons{flex-wrap:wrap}.example-buttons button{min-height:40px}.example-stage-tabs{display:flex;overflow-x:auto;gap:5px;padding:4px 3px 12px}.example-stage-tabs button{flex:1 0 115px;border:1px solid #c1ceba;border-radius:3px;background:transparent;color:var(--muted);padding:10px 7px;font-size:11px;min-height:44px;line-height:1.5;white-space:nowrap}.example-stage-tabs button span{font-family:var(--mono);font-size:9px;margin-right:6px;opacity:.7}.example-stage-tabs button[aria-selected=true]{background:var(--green);border-color:var(--green);color:white}.example-stage-tabs button:focus-visible{outline-offset:-3px;outline-color:#f1bd6c}
.example-view>a{display:block;aspect-ratio:16/9;background:#101910;border:1px solid #d1dac9;border-radius:3px;overflow:hidden}.example-view img{display:block;width:100%;height:100%;object-fit:contain}.example-view figcaption{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:11px;color:var(--muted);margin-top:10px}.example-view figcaption a{font-size:11px}.example-description{min-height:66px}.example-provenance{font-size:11px}.example-provenance a{white-space:normal}
.orientation-panel svg{max-height:180px;margin:20px auto}.symmetry-block p{font-size:13px}
.mapping-figure{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.mapping-inputs{display:grid;grid-template-columns:1fr 1fr;background:#e8eedf;border-bottom:1px solid var(--line)}.mapping-inputs>div{padding:25px 27px}.mapping-inputs>div+div{border-left:1px solid var(--line)}.mapping-inputs .figure-label{display:block;margin-bottom:9px}.mapping-inputs strong{font-size:16px;font-weight:600;line-height:1.5}.mapping-inputs p{font-size:12px;color:var(--muted);margin-top:8px}.mapping-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));padding:26px 0}.mapping-flow>div{padding:0 22px;position:relative}.mapping-flow>div+div{border-left:1px solid var(--line)}.mapping-flow h3{font-size:17px;margin-top:17px;line-height:1.3}.mapping-flow p{font-size:12px;line-height:1.7;color:var(--muted);margin-top:10px}.mapping-figure figcaption{padding:15px 25px;border-top:1px solid var(--line);color:var(--muted);font-size:11px}.mapping-details{margin-top:28px}.mapping-details h3{font-size:20px}.mapping-details p{font-size:13px;color:var(--muted)}
.navigation-panels{margin-bottom:0}.navigation-diagram{margin:20px auto;max-height:240px}.navigation-diagram text{font-size:12px;fill:var(--muted)}.navigation-flow-wrap{padding-top:26px}#navigation .navigation-flow{margin-top:0}
.source-line{overflow-wrap:anywhere}.sidebar{overflow-y:auto}.step-tabs button{min-height:44px}.step-actions button{min-height:40px}
@media(min-width:1500px){.hero h1{font-size:54px}}
@media(max-width:1200px){.projection-lab{grid-template-columns:minmax(260px,.9fr) minmax(0,1.1fr)}.pose-controls{grid-template-columns:1fr;gap:6px;margin-top:18px}.projection-copy{padding:24px}.projection-stage{padding:16px}.mapping-flow>div{padding:0 16px}.mapping-flow h3{font-size:15px}.hero h1{font-size:40px}.wordmark-subtitle{display:block;margin-top:3px}.wordmark-subtitle .divider{display:none}}
@media(max-width:960px){.repository-button{margin-left:auto}.sidebar{overflow-y:hidden;overflow-x:auto}.projection-lab{grid-template-columns:minmax(290px,.9fr) minmax(0,1.1fr)}.pose-controls{grid-template-columns:1fr 1fr;gap:10px 16px}.hero h1{font-size:43px}}
@media(max-width:720px){.repository-button{font-size:10px;padding:6px 9px;min-height:36px}.wordmark{white-space:normal;max-width:calc(100% - 78px);line-height:1.5}.wordmark-subtitle{font-size:8px;letter-spacing:.08em}.document-tag{display:none}.hero h1{font-size:41px}.hero-figure{padding-bottom:0}.projection-lab{grid-template-columns:1fr}.projection-copy{padding:24px}.pose-controls{gap:12px 24px}.projection-stage{width:100%}.example-heading{margin-bottom:15px}.example-buttons{gap:6px}.example-buttons button{min-height:44px;padding:6px 9px}.example-description{min-height:80px}.mapping-flow{grid-template-columns:1fr 1fr;padding:0}.mapping-flow>div{padding:23px}.mapping-flow>div:nth-child(3){border-left:0}.mapping-flow>div:nth-child(n+3){border-top:1px solid var(--line)}.mapping-flow h3{font-size:18px}.mapping-inputs>div{padding:20px}.mapping-inputs strong{font-size:14px}.control-table .evidence-table{min-width:540px}.flight-diagram{max-height:230px}.time-cell strong{font-size:13px}.example-provenance{font-size:10px}.sidebar nav a{font-size:11px}.repository-button span{display:none}}
@media(max-width:480px){.pose-controls{grid-template-columns:1fr;gap:7px}.pose-controls label{font-size:12px}.mapping-inputs{grid-template-columns:1fr}.mapping-inputs>div+div{border-left:0;border-top:1px solid var(--line)}.mapping-flow>div{padding:19px}.mapping-flow h3{font-size:16px}.example-buttons button{flex:1 0 55px}.hero h1{font-size:36px}.projection-stage figcaption{font-size:10px}.case-card:last-child{grid-template-columns:100px 1fr}.example-view figcaption{font-size:10px}.example-view figcaption a{font-size:10px}}
@media(max-width:350px){.hero h1{font-size:32px}.wordmark{font-size:8px}.topbar{padding:0 12px;gap:8px}.mapping-flow{grid-template-columns:1fr}.mapping-flow>div+div{border-left:0;border-top:1px solid var(--line)}.case-card:last-child{display:block}.case-grid{gap:9px}.panel{padding:17px}.projection-copy{padding:20px}.example-stage-tabs button{flex-basis:125px}}
@media print{.hero h1{font-size:27pt}.hero-figure{padding:0}.projection-lab{grid-template-columns:220px 1fr}.pose-controls{grid-template-columns:1fr 1fr;gap:8px 14px}.pose-controls .control{margin:0}.pose-controls label{font-size:8pt}.example-stage-tabs{display:none}.example-view>a{max-width:140mm;margin:auto}.example-view figcaption,.example-provenance{font-size:8pt}.mapping-inputs{grid-template-columns:1fr 1fr}.mapping-flow{grid-template-columns:repeat(4,minmax(0,1fr))}.mapping-flow h3{font-size:10pt}.mapping-flow p,.mapping-inputs p{font-size:8pt}.mapping-flow>div{padding:14px}.mapping-inputs>div{padding:15px}.mapping-figure{break-inside:avoid}.flight-diagram{max-height:160px}.control-table .evidence-table{min-width:0}.example-description{min-height:0}.repository-button{display:none}}

/* Selsus integration layer */
:root {
  --paper: #f2f3d9;
  --white: rgba(255, 255, 255, 0.42);
  --ink: #171717;
  --muted: #5d6471;
  --green: #6d28d9;
  --deep: #420217;
  --line: rgba(110, 125, 203, 0.7);
  --soft: rgba(109, 40, 217, 0.08);
  --mint: #ddd6fe;
  --amber: #b77828;
  --amber-soft: rgba(183, 120, 40, 0.16);
  --radius: 8px;
  --shadow: 0 12px 28px rgba(51, 28, 87, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #420217;
    --white: rgba(31, 41, 55, 0.34);
    --ink: #ededed;
    --muted: #d4d4d8;
    --green: #ddd6fe;
    --deep: #25000d;
    --line: rgba(255, 255, 255, 0.24);
    --soft: rgba(255, 255, 255, 0.08);
    --mint: #f5f3ff;
    --amber-soft: rgba(183, 120, 40, 0.2);
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  }
}

html {
  scroll-padding-top: 132px;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

a {
  color: var(--green);
}

.skip-link {
  background: var(--white);
  border: 1px solid var(--line);
  color: var(--ink);
}

.selsus-project-nav {
  background: transparent;
  border: 0;
  gap: 1rem;
  height: auto;
  justify-content: space-between;
  left: 0;
  min-height: 74px;
  padding: 1rem;
  position: fixed;
  right: 0;
  top: 0;
  z-index: 30;
}

.selsus-project-brand {
  align-items: center;
  color: var(--green);
  display: inline-flex;
  gap: 0.65rem;
  letter-spacing: 0.14em;
  text-decoration: none;
}

.selsus-project-brand img {
  filter: invert(25%) sepia(49%) saturate(2800%) hue-rotate(246deg) brightness(88%);
  height: 42px;
  width: 42px;
}

.selsus-project-brand span {
  font-size: 0.9rem;
  font-weight: 300;
}

.project-nav-tabs {
  align-items: center;
  background: rgba(82, 82, 91, 0.46);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  display: flex;
  gap: 0.125rem;
  padding: 0.25rem;
}

.project-nav-tabs a {
  border-radius: 6px;
  color: white;
  font-size: 0.78rem;
  font-weight: 300;
  letter-spacing: 0.14em;
  padding: 0.7rem 1rem;
  text-decoration: none;
  text-transform: uppercase;
}

.project-nav-tabs a:hover {
  background: rgba(255, 255, 255, 0.22);
  text-decoration: none;
}

.page-shell {
  max-width: none;
  padding-top: 74px;
}

.sidebar {
  top: 74px;
}

.sidebar nav a.active {
  background: rgba(109, 40, 217, 0.1);
}

main {
  border-left-color: var(--line);
}

.hero {
  background: var(--paper);
  color: var(--ink);
  position: relative;
}

.hero::before {
  background-image:
    linear-gradient(135deg, rgba(124, 99, 224, 0.18) 0 1px, transparent 1px 96px),
    linear-gradient(45deg, rgba(124, 99, 224, 0.12) 0 1px, transparent 1px 120px);
  background-size: 180px 180px, 220px 220px;
  content: "";
  inset: 0;
  opacity: 0.35;
  pointer-events: none;
  position: absolute;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero h1,
.section-heading h2 {
  color: var(--green);
  font-weight: 300;
  letter-spacing: 0;
}

.hero h1 em {
  color: var(--green);
}

.hero-intro,
.hero-detail,
.hero-bottom p,
.hero-bottom strong {
  color: var(--muted);
}

.hero-bottom {
  border-top-color: var(--line);
}

.hero-bottom a,
.source-line a,
.source-home {
  color: var(--green);
}

.hero-chips span,
.status-pill,
.review-tag {
  border-color: var(--line);
  color: var(--green);
}

.panel,
.case-card,
.stepper,
.timeline-figure,
.mapping-figure,
.frozen-examples,
.receipt-details,
.projection-lab,
.output-block,
.settings-card,
.closing-card {
  background: var(--white);
  border-color: var(--line);
  box-shadow: var(--shadow);
}

.scope-note,
.section,
.convention-strip,
.hero-bottom,
.review-list li,
footer {
  border-color: var(--line);
}

.projection-copy,
.step-tabs,
.mapping-inputs,
.timeline-figure figcaption,
.evidence-table thead th,
.evidence-table tbody th,
.receipt-details,
.example-view > a {
  background: var(--soft);
}

.step-tabs button[aria-selected=true],
.example-stage-tabs button[aria-selected=true],
.example-buttons button[aria-pressed=true],
.primary-button {
  background: var(--green);
  border-color: var(--green);
  color: var(--paper);
}

.subtle-button,
.example-stage-tabs button,
.example-buttons button,
.repository-button,
.selsus-home-button {
  border-color: var(--line);
  color: var(--green);
}

.scene-callout,
.note-bar,
.overlay-warning {
  background: var(--amber-soft);
  border-color: rgba(183, 120, 40, 0.34);
}

.closing-card {
  color: var(--ink);
}

.closing-card strong,
.closing-card a {
  color: var(--green);
}

.brand-icon {
  color: var(--green);
}

svg text,
.navigation-diagram text {
  fill: var(--muted);
}

@media (prefers-color-scheme: dark) {
  .selsus-project-brand img {
    filter: none;
  }
}

@media (max-width: 960px) {
  html {
    scroll-padding-top: 132px;
  }

  .sidebar {
    background: var(--paper);
    top: 74px;
  }
}

@media (max-width: 720px) {
  .selsus-project-nav {
    min-height: 66px;
    padding: 0.75rem 1rem;
  }

  .selsus-project-brand span {
    display: none;
  }

  .project-nav-tabs a {
    font-size: 0.68rem;
    padding: 0.58rem 0.68rem;
  }

  .page-shell {
    padding-top: 66px;
  }

  .sidebar {
    top: 66px;
  }
}

/* Final Selsus polish: keep this last. */
.projection-lab,
.frozen-examples,
.mapping-figure,
.timeline-figure,
.stepper,
.panel,
.case-card,
.output-block,
.receipt-details,
.closing-card {
  background: var(--white);
  border-color: var(--line);
  box-shadow: var(--shadow);
}

.projection-copy,
.step-tabs,
.mapping-inputs,
.mapping-figure figcaption,
.timeline-figure figcaption,
.evidence-table thead th,
.evidence-table tbody th,
.example-view > a,
.symmetry-visual > span {
  background: var(--soft);
}

.mapping-inputs > div + div,
.mapping-flow > div + div,
.projection-copy,
.step-tabs,
.timeline-figure figcaption,
.mapping-figure figcaption,
.example-provenance,
.example-view > a,
.example-pair img,
.receipt-details[open] summary {
  border-color: var(--line);
}

.hero,
.content,
.sidebar,
.page-shell {
  background: transparent;
}

.topbar.selsus-project-nav {
  background: transparent;
  border: 0;
}

#randomize-projection,
.subtle-button,
.example-buttons button,
.example-stage-tabs button {
  border-color: var(--line);
  color: var(--green);
}

.primary-button,
.step-tabs button[aria-selected=true],
.example-buttons button[aria-pressed=true],
.example-stage-tabs button[aria-selected=true] {
  background: var(--green);
  border-color: var(--green);
  color: var(--paper);
}

.scene-callout,
.note-bar,
.overlay-warning {
  background: var(--amber-soft);
  border-color: rgba(183, 120, 40, 0.34);
}

footer,
footer a,
.section-heading > p,
.panel p,
.fit-details p,
.mapping-details p,
.case-card p,
.review-list p,
.example-description p,
.channel-grid p,
.output-block p,
.evidence-table td,
.status-list dd {
  color: var(--muted);
}

@media (max-width: 960px) {
  .sidebar {
    background: var(--paper);
  }
}