/* Everywhere Safety article shell, matched to the Treasure Hunt blog.
   Figure-specific layout and SVG drawing remain in their own files. */
:root {
  --paper: #eef3f2;
  --white: #f8fbfa;
  --ink: #102725;
  --muted: #69736f;
  --soft: #445c58;
  --line: rgba(16,39,37,.14);
  --safe: #0b7469;
  --caption: #e7eeeb;
}
body { background:var(--paper); line-height:1.6; }
::selection { color:var(--white); background:var(--safe); }
.masthead {
  width:min(1440px,calc(100% - 64px)); max-width:none;
  height:82px; margin-inline:auto; padding:0; border-bottom:0;
}
.brand {
  font-family:var(--serif); font-size:25px; font-weight:400;
  letter-spacing:-.035em; gap:10px; white-space:nowrap;
}
.brand .site-mark {
  width:30px; height:30px; padding:4px; border-radius:8px;
  background:var(--ink); object-fit:contain;
}
.brand-dot { color:var(--safe); margin-left:-10px; }
.masthead-links { display:flex; gap:clamp(18px,3vw,34px); }
.masthead-links a { color:var(--soft); font-size:14px; font-weight:400; }
.masthead-links a:hover { color:var(--safe); text-decoration:none; }
.hero {
  max-width:none; padding:52px 24px 32px;
  text-align:left; border-bottom:1px solid var(--line);
}
.hero > * { width:min(704px,100%); margin-inline:auto; }
.hero > .eyebrow {
  color:var(--safe); font-size:16px; letter-spacing:.025em;
  margin-bottom:18px;
}
.hero > .eyebrow span { margin-left:15px; color:var(--muted); font-size:12px; letter-spacing:.035em; }
.hero h1 {
  max-width:704px; font-family:var(--sans); font-weight:600;
  font-size:clamp(34px,4vw,50px); line-height:1.12;
  letter-spacing:-.035em; margin-bottom:18px; text-wrap:balance;
  margin-left:auto; margin-right:auto;
}
.hero h1 em {
  color:var(--risk); font-family:var(--serif); font-style:italic;
  font-weight:500; font-size:1.08em; letter-spacing:-.035em;
}
.hero-deck { font:400 clamp(18px,2vw,21px)/1.45 var(--sans); color:var(--soft); margin-block:0; }
.article-meta {
  display:flex; justify-content:space-between; gap:8px 24px;
  align-items:start; padding:24px 0 12px; color:var(--muted);
  font-size:13px;
}
.article-meta .author { font:400 13px/1.6 var(--sans); margin:0; }
.article-meta .author a { color:var(--soft); border:0; }
.article-meta .author span { font-size:12px; margin-top:3px; }
#reading-time { flex-shrink:0; }
.resource-links { justify-content:start; margin-top:15px; gap:10px; }
.resource-links a {
  display:inline-flex; min-height:40px; align-items:center; gap:7px;
  font-size:12px; font-weight:600; border-radius:100px;
  padding:0 17px; background:rgba(248,251,250,.4); color:var(--soft);
}
.resource-links a:first-child { background:var(--ink); color:white; }
.resource-links a:hover { background:var(--white); color:var(--safe); }
.resource-links a:first-child:hover { background:var(--safe); color:white; }
.wide { width:min(1000px,calc(100% - 64px)); }
.hero-experiment { margin-top:36px; margin-bottom:60px; background:var(--white); border:0; border-top:1px solid var(--line); border-bottom:1px solid var(--line); padding:26px 28px 22px; }
.prose { width:min(704px,calc(100% - 48px)); font-size:17px; line-height:1.75; }
.prose > p:not(.section-number) { font:400 17px/1.75 var(--sans); color:var(--ink); margin-bottom:20px; }
.prose h2 { font:600 clamp(26px,3vw,32px)/1.25 var(--sans); letter-spacing:-.025em; margin-bottom:20px; }
.essay-section .section-number { display:none; }
.chapter-index {
  display:inline-block; color:var(--section-accent,var(--safe));
  font:400 .6em/1 var(--sans); margin-right:.75em;
  vertical-align:.12em; font-variant-numeric:tabular-nums;
}
.essay-section { margin-bottom:62px; }
.prose > p.pull-line { font:400 21px/1.5 var(--serif); padding:12px 0 12px 22px; margin:27px 0; border-left-color:var(--safe); }
.figure-heading h2,.figure-heading h3 { font:500 22px/1.3 var(--sans); letter-spacing:-.02em; }
.figure-heading .eyebrow { color:var(--safe); font-size:10px; letter-spacing:.1em; }
.results-figure,.method-figure,.transfer-figure,.case-figure { background:var(--white); padding:26px 28px 20px; border-top:1px solid var(--line); }
.segmented { border-radius:6px; background:var(--paper); }
.segmented button { font-size:12px; border-radius:3px; }
.segmented button[aria-pressed=true] { background:var(--safe); }
.permission-controls button[aria-pressed=true] { background:var(--risk-pale); color:var(--risk); }
.permission-controls button[data-permission=expanded][aria-pressed=true] { background:var(--safe-pale); color:var(--safe); }
figcaption {
  width:min(704px,100%); margin:18px auto 0; padding:13px 15px;
  background:var(--caption); color:var(--muted);
  font:400 13px/1.6 var(--sans);
}
.hero-experiment figcaption { font-size:13px; }
.figure-label { font-size:10px; line-height:1.6; }
.note-link { font-size:11px; }
.chart-reading { font:400 13px/1.6 var(--sans); color:var(--muted); }
.chart-legend { font-size:12px; }
.gap-label,.bar-label { font-size:13px; }
.gap-values { font-size:17px; }
.full-work-note { font-size:12px; }
.sample-label { font-size:11px; }
.case-layout { grid-template-columns:160px minmax(0,1fr); gap:20px; }
.case-detail h4 { font:500 21px/1.3 var(--sans); }
.case-step { font-size:11px; }
.evidence-state > div { font-size:12px; }
.case-insight summary { font-size:12px; }
.case-insight p { font:400 15px/1.65 var(--sans); }
.owner-event { font-size:12px; }
.contents-rail { left:max(24px,calc(50% - 688px)); width:176px; }
.contents { top:32px; padding:22px 0 8px; }
.contents > .tiny-label { margin:0 0 14px 16px; font-size:11px; letter-spacing:.1em; font-weight:400; }
.contents a { display:grid; grid-template-columns:15px minmax(0,1fr); gap:7px; border-left:2px solid var(--line); padding:7px 6px 7px 14px; margin-bottom:5px; font-size:12px; }
.contents a.active { color:var(--chapter-accent,var(--safe)); border-left-color:var(--chapter-accent,var(--safe)); font-weight:400; }
.contents a.active:before { display:none; }
.mobile-contents { width:min(704px,calc(100% - 48px)); background:var(--white); padding:15px 18px; border:1px solid var(--line); border-radius:8px; margin-bottom:32px; }
.mobile-contents summary { font-size:13px; color:var(--safe); }
.evidence-notes summary { font-size:14px; }
.evidence-notes details p { font:400 15px/1.7 var(--sans); }
.evidence-notes > .data-link { font-size:13px!important; }
.permission-table { font-size:13px; }
.permission-table th,.permission-table td { padding:10px 6px; }
.permission-table caption { font-size:13px; }
.citation-section { margin-bottom:64px; }
.citation-section > p:not(.section-number) { font-size:17px; }
.citation-actions a,.citation-actions button { border-radius:100px; font-size:12px; }
.citation-section pre { font-size:12px; background:var(--white); border:1px solid var(--line); border-radius:8px; }
.site-footer { width:min(1440px,calc(100% - 64px)); padding:30px 0 36px; font-size:13px; }
.site-footer .brand { font-size:23px; }
@media(min-width:1280px) {
  .wide { width:min(960px,calc(100vw - 480px)); }
  .contents-rail { display:block; }
  .mobile-contents { display:none; }
}
@media(max-width:650px) {
  .masthead { width:calc(100% - 30px); height:auto; min-height:74px; flex-wrap:wrap; gap:12px; padding:16px 0; }
  .masthead .brand { font-size:22px; }
  .masthead-links { gap:18px; flex-wrap:wrap; }
  .masthead-links a { font-size:13px; }
  .masthead-links a:first-child { display:block; }
  .hero { padding:34px 24px 26px; }
  .hero > .eyebrow { font-size:15px; }
  .hero > .eyebrow span { display:block; margin:7px 0 0; font-size:12px; }
  .hero h1 { font-size:34px; letter-spacing:-.035em; }
  .hero-deck { font-size:18px; max-width:none; }
  .article-meta { padding:20px 0 10px; flex-wrap:wrap; }
  .article-meta .author span { max-width:none; margin:4px 0 0; font-size:12px; }
  .resource-links { flex-wrap:wrap; margin-top:13px; }
  .resource-links a { font-size:11px; min-height:38px; padding:0 14px; }
  .prose { width:calc(100% - 48px); font-size:16px; }
  .prose > p:not(.section-number) { font-size:16px; }
  .prose h2 { font-size:26px; letter-spacing:-.025em; }
  .prose > p.pull-line { font-size:20px; }
  .wide { width:calc(100vw - 32px); }
  .hero-experiment,.results-figure,.method-figure,.transfer-figure,.case-figure { padding:22px 16px 18px; }
  .figure-heading h2,.figure-heading h3 { font-size:20px; }
  figcaption,.hero-experiment figcaption { font-size:12px; padding:12px; }
  .figure-label { font-size:9px; }
  .gap-label,.bar-label { font-size:12px; }
  .gap-values { font-size:16px; }
  .case-layout { gap:18px; }
  .case-detail h4 { font-size:20px; }
  .site-footer { width:calc(100% - 30px); padding:25px 0 30px; flex-wrap:wrap; }
  .site-footer .brand { font-size:20px; }
}

/* Research article: native evidence figures and a persistent contents rail. */
.prose { width:min(720px,calc(100% - 48px)); font-size:18px; }
.prose > p:not(.section-number) { font-size:18px; line-height:1.75; }
.hero { padding-bottom:8px; }
.hero-deck { max-width:680px; }
.contents-rail { width:156px; left:max(20px,calc(50% - 688px)); }
.contents a { grid-template-columns:18px minmax(0,1fr); font-size:12px; line-height:1.45; padding:8px 4px 8px 12px; }
.contents a.contents-notes { margin-top:15px; color:var(--muted); }
.contents a[aria-current="location"] { background:color-mix(in srgb,var(--chapter-accent,var(--safe)) 6%,transparent); }
.native-chart { min-width:0; margin:25px 0 10px; }
.result-svg { display:block; width:100%; overflow:visible; }
.result-svg text { font-family:var(--sans); }
.chart-grid { stroke:var(--line); stroke-width:1; fill:none; }
.axis-text { fill:var(--muted); font-size:12px; }
.path-legend { display:flex; flex-wrap:wrap; gap:10px 22px; color:var(--muted); font-size:12px; margin:10px 0; }
.path-legend > span { display:flex; gap:7px; align-items:center; }
.path-swatch { width:20px; height:3px; border-radius:1px; flex-shrink:0; }
.conflict-row { margin-bottom:22px; }
.pair-panel + .pair-panel { margin-top:22px; border-top:1px solid var(--line); padding-top:21px; }
.pair-heading { font:500 15px/1.5 var(--sans); margin:0; }
.role-values { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:10px; }
.role-values > div { display:flex; flex-direction:column; gap:5px; }
.role-values span { color:var(--muted); font-size:12px; }
.role-values strong { font:500 21px/1.2 var(--sans); }
.transfer-controls { display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:12px; margin:20px 0 28px; }
.transfer-controls .segmented { display:flex; flex-wrap:wrap; }
.transfer-controls .segmented button { padding:10px 13px; }
.interface-picker { display:flex; flex-direction:column; gap:5px; color:var(--muted); font-size:11px; }
.interface-picker select { appearance:auto; min-height:36px; padding:6px 24px 6px 10px; font:400 13px var(--sans); color:var(--ink); border:1px solid var(--line); border-radius:5px; background:var(--white); }
.full-work-note { gap:15px; flex-wrap:wrap; }
.full-work-note strong { text-align:right; line-height:1.6; max-width:70%; }
.method-art { width:100%; display:block; margin:16px auto 0; }
.method-art text { font:500 16px var(--sans); fill:var(--ink); }
.method-art .art-soft { font-size:13px; fill:var(--muted); }
.motion-figure { padding:26px 0 16px; border-top:1px solid var(--line); }
.motion-figure .figure-heading { padding-inline:24px; }
.motion-open { font-size:12px; color:var(--safe); }
.motion-frame { display:block; width:100%; border:0; min-height:620px; }
.case-explorer { background:var(--white); border:1px solid var(--line); border-radius:8px; padding:18px 22px; margin:18px auto 42px; }
.case-explorer > summary { cursor:pointer; font:500 14px var(--sans); color:var(--safe); }
.case-explorer .case-layout { margin-top:26px; }
.case-explorer .case-detail > p { font:400 14px/1.65 var(--sans); }
.case-controls { display:flex; flex-wrap:wrap; gap:8px; margin-top:16px; }
.case-controls button { border:1px solid var(--line); background:var(--white); border-radius:4px; padding:9px 10px; font:400 12px var(--sans); color:var(--ink); }
#case-slider { width:100%; margin-top:16px; accent-color:var(--safe); }
.bait-figure { padding:26px 28px 20px; background:var(--white); border-top:1px solid var(--line); }
.bait-lanes { display:grid; grid-template-columns:1fr 1fr; gap:16px; margin:25px 0; }
.bait-lane { padding:16px 14px; border:1px solid var(--line); border-radius:8px; min-width:0; }
.lane-label { display:block; font:500 12px/1.5 var(--sans); margin-bottom:12px; }
.bait-lane pre { white-space:pre-wrap; overflow-wrap:anywhere; color:var(--ink); font:400 11px/1.8 ui-monospace,SFMono-Regular,Menlo,monospace; margin:0 0 18px; }
.feature-flow { display:flex; flex-wrap:wrap; align-items:center; gap:6px; }
.feature-chip,.predictor-chip { padding:5px 7px; font:400 11px var(--sans); border:1px solid var(--line); border-radius:5px; background:var(--paper); }
.feature-chip.forbidden { background:var(--risk-pale); border-color:var(--risk); color:var(--risk); }
.feature-chip.excluded { background:var(--safe-pale); color:var(--safe); }
.predictor-chip { border-color:var(--safe); color:var(--safe); }
.flow-arrow { color:var(--muted); }
.bait-results { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.bait-result > div { display:flex; gap:12px; justify-content:space-between; font-size:12px; padding:9px 0; border-top:1px solid var(--line); }
.bait-result > div span { color:var(--muted); }
.bait-result > div strong { color:var(--ink); font-weight:500; text-align:right; }
#idea { --section-accent:#0b7469; } #construction { --section-accent:#96834d; } #findings { --section-accent:#b35d42; } #safety { --section-accent:#0b7469; } #transfer { --section-accent:#567f93; } #dynamic { --section-accent:#83729b; } #external { --section-accent:#ad644b; } #outlook { --section-accent:#637c6b; }
@media(min-width:1150px) {
  .contents-rail { display:block; }
  .mobile-contents { display:none; }
  .article-layout .wide { width:min(960px,calc(100vw - 400px)); }
}
@media(max-width:1149px) {
  .contents-rail { display:none; }
  .mobile-contents { display:block; width:min(720px,calc(100% - 48px)); }
}
@media(max-width:650px) {
  .prose > p:not(.section-number) { font-size:17px; line-height:1.72; }
  .hero h1 { font-size:clamp(32px,9vw,44px); }
  .hero-experiment,.results-figure,.method-figure,.transfer-figure,.bait-figure { padding:20px 16px 16px; }
  .figure-heading h2,.figure-heading h3 { font-size:19px; }
  .figure-heading { align-items:flex-start; }
  .segmented { flex-wrap:wrap; max-width:100%; }
  .segmented button { font-size:11px; padding:10px 9px; }
  .transfer-controls { align-items:stretch; }
  .transfer-controls .segmented { width:100%; }
  .transfer-controls .segmented button { flex:1; }
  .interface-picker { width:100%; }
  .full-work-note strong { max-width:100%; text-align:left; }
  .bait-lanes,.bait-results { grid-template-columns:1fr; }
  .bait-lane pre { font-size:12px; }
  .method-art text { font-size:19px; }
  .motion-frame { min-height:820px; }
  .case-explorer { padding:16px 12px; }
  .role-values span { font-size:11px; }
  .role-values strong { font-size:20px; }
  .conflict-row { grid-template-columns:90px minmax(0,1fr) 52px; }
  .path-legend { font-size:12px; }
}
@media(prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } }
.motion-links { display:flex; flex-wrap:wrap; gap:10px 18px; }
.method-mobile-labels { display:none; }
@media(max-width:650px) {
  .method-art text { display:none; }
  .method-mobile-labels { display:grid; grid-template-columns:repeat(3,1fr); gap:4px; text-align:center; font:400 13px var(--sans); color:var(--muted); margin:4px 0 10px; }
}
.tldr { --section-accent:var(--safe); margin:28px auto 42px; }
.tldr .section-number { display:block; color:var(--safe); font:500 12px var(--sans); letter-spacing:.08em; margin-bottom:10px; }
.tldr h2 { font-size:27px; margin-bottom:20px; }
.tldr-list { list-style:none; counter-reset:claims; margin:0; padding:0; }
.tldr-list > li { counter-increment:claims; position:relative; border-top:1px solid var(--line); padding:12px 0 12px 30px; }
.tldr-list > li::before { content:counter(claims); position:absolute; left:0; top:14px; font:500 17px var(--sans); color:var(--safe); }
.tldr-list h3 { font:600 18px/1.5 var(--sans); color:var(--ink); margin:0 0 9px; }
.tldr-list p { font:400 16px/1.72 var(--sans); color:var(--soft); margin:0; }
.tldr-subpoints { display:grid; grid-template-columns:1fr 1fr; gap:22px; margin-top:15px; }
.tldr-subpoints p { font-size:15px; }
.tldr-subpoints strong:first-child { display:block; font-weight:600; color:var(--ink); margin-bottom:5px; }
.prose-subhead { font:600 20px/1.45 var(--sans); margin:24px 0 15px; color:var(--ink); }
@media(max-width:650px) { .tldr { width:calc(100% - 48px); } .tldr-subpoints { grid-template-columns:1fr; gap:15px; } .tldr-list > li { padding-left:28px; } .tldr h2 { font-size:25px; } .tldr-list p,.tldr-subpoints p { font-size:16px; } }
.tldr-list p { font-size:17px; }
.tldr-subpoints p { font-size:16px; }
.tldr-list > li > p > strong { color:var(--ink); font-weight:600; }
.permission-example { border:1px solid var(--line); padding:16px 20px; border-radius:8px; background:var(--white); }
.permission-example > summary { font:500 14px/1.5 var(--sans); color:var(--safe); cursor:pointer; }
.permission-example .hero-experiment { width:100%; margin:20px auto 0; padding:20px 0 0; }
.skip-link:not(:focus) { visibility:hidden; }
.misalignment-routes { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:30px; margin-block:26px 32px; }
.misalignment-routes > div { border-top:2px solid var(--risk); padding-top:15px; min-width:0; }
.misalignment-routes > div:first-child { border-top-color:#7c9bad; }
.misalignment-routes .tiny-label { font-size:10px; line-height:1.5; letter-spacing:.06em; }
.misalignment-routes h3 { margin:10px 0 12px; font:500 21px/1.4 var(--sans); color:var(--ink); }
.misalignment-routes p { margin:0; font:400 16px/1.7 var(--sans); color:var(--soft); }
.route-formula { display:flex; flex-wrap:wrap; gap:12px 24px; align-items:center; min-height:44px; margin:0 0 12px; color:var(--safe); }
.route-formula math { font-size:23px; }
.misalignment-routes > div:nth-child(2) .route-formula { color:var(--risk); }
.misalignment-routes > p.route-notation { grid-column:1/-1; font-size:12px; line-height:1.6; color:var(--muted); margin-top:-12px; }
.dynamics-explorer { border:1px solid var(--line); background:var(--white); border-radius:6px; margin-block:24px 30px; }
.dynamics-explorer > summary { display:flex; flex-wrap:wrap; align-items:center; gap:8px 20px; padding:17px 20px; list-style:none; cursor:pointer; font:500 15px/1.5 var(--sans); color:var(--heading); }
.dynamics-explorer > summary::-webkit-details-marker { display:none; }
.dynamics-explorer > summary::after { content:'＋'; margin-left:auto; color:var(--safe); font-weight:400; }
.dynamics-explorer[open] > summary::after { content:'−'; }
.dynamics-explorer > summary small { color:var(--muted); font:400 12px/1.5 var(--sans); }
.dynamics-explorer[open] > summary { border-bottom:1px solid var(--line); }
.dynamics-mapping { margin:0; padding:0 12px 18px; }
.dynamics-motion-frame { width:100%; height:720px; display:block; border:0; background:var(--paper); }
@media(max-width:650px) { .dynamics-explorer > summary { padding:15px 16px; gap:5px 15px; } .dynamics-explorer > summary small { flex-basis:calc(100% - 30px); order:3; } .dynamics-motion-frame { height:1050px; } .dynamics-mapping { padding:0 4px 15px; } }
.transfer-case { margin-top:48px; }
#shortcuts { --section-accent:#9a6434; }
#construction { scroll-margin-top:30px; }
@media(max-width:700px) { .misalignment-routes { grid-template-columns:1fr; gap:25px; } .misalignment-routes h3 { font-size:20px; } }
@media(min-width:900px) {
  .masthead { height:64px; }
  .masthead.personal-masthead { min-height:64px; padding:12px 0; }
  .hero { padding:14px 24px 8px; }
  .hero > .eyebrow { margin-bottom:8px; }
  .hero h1 { margin-bottom:10px; }
  .hero .hero-deck { font-size:20px; }
  .article-meta { padding:12px 0 6px; }
  .resource-links { margin-top:6px; }
  .resource-links a { min-height:34px; padding:0 14px; }
  .tldr { width:min(960px,calc(100% - 48px)); margin:14px auto 32px; }
  .tldr h2 { font-size:22px; margin-bottom:12px; }
  .tldr-list { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); column-gap:28px; }
  .tldr-list > li { padding:10px 0 10px 28px; }
  .tldr-list > li::before { top:12px; }
  .tldr-list p { font-size:17px; line-height:1.55; }
}

/* Quiet project-page typography; evidence colors retain their semantic roles. */
:root { --paper:#fdf6e3; --white:#fffaf0; --ink:#586e75; --soft:#586e75; --muted:#657b83; --line:#ded8c5; --caption:#eee8d5; --heading:#073642; }
.hero { text-align:center; }
.hero h1 { width:min(960px,100%); max-width:960px; font:400 clamp(38px,4.5vw,60px)/1.1 var(--serif); letter-spacing:-.025em; margin:0 auto 14px; }
.hero h1 em { font-size:1.03em; font-weight:400; }
.hero h1,.prose h2 { color:var(--heading); }
.hero .hero-deck { font-size:19px; }
.article-meta { flex-direction:column; align-items:center; justify-content:center; gap:5px; padding:14px 0 6px; text-align:center; }
.article-meta .author { font-size:14px; }
.article-meta .author a { color:var(--ink); }
.article-meta .author span { font-size:12px; }
#reading-time { font-size:11px; color:var(--muted); }
.hero .resource-links { justify-content:center; gap:10px; margin-top:12px; }
.hero .resource-links a,.hero .resource-links a:first-child { min-height:34px; padding:0 14px; background:transparent; color:var(--soft); border:1px solid var(--line); border-radius:4px; font-size:13px; font-weight:400; }
.hero .resource-links a:hover { color:var(--safe); background:var(--white); border-color:var(--safe); }
.contents a[aria-current="location"] { background:transparent; }
.contents a { font-size:11.5px; }
.citation-section { margin-top:42px; border-top:1px solid var(--line); padding-top:16px; }
.citation-section > summary { font:500 14px/1.6 var(--sans); color:var(--soft); cursor:pointer; }
.citation-section > p { margin-top:18px; }
.site-footer { border-top:1px solid var(--line); font-size:12px; color:var(--muted); }
.figure-inspection { margin:18px 0 0; padding:12px 14px; color:var(--soft); background:var(--caption); border-radius:4px; font:400 13px/1.65 var(--sans); }
.figure-inspection strong { color:var(--ink); font-weight:500; }
.checkpoint-inspector { display:flex; flex-wrap:wrap; align-items:center; gap:20px; border-top:1px solid var(--line); padding-top:17px; margin-top:12px; }
.checkpoint-inspector > label { font:400 12px/1.5 var(--sans); color:var(--muted); }
.checkpoint-inspector select { margin-left:8px; padding:6px 9px; border:1px solid var(--line); border-radius:4px; background:var(--white); color:var(--ink); font:400 13px var(--sans); }
.checkpoint-slider { display:flex; align-items:center; gap:12px; flex:1; }
.checkpoint-slider input { min-width:70px; flex:1; accent-color:var(--safe); }
.checkpoint-slider output { min-width:76px; color:var(--ink); font-variant-numeric:tabular-nums; }
.checkpoint-point { cursor:pointer; }
.checkpoint-point:focus { outline:none; stroke:var(--ink); stroke-width:2.5; }
.gap-node { padding:0; cursor:pointer; }
.boundary-context-controls { margin-top:10px; }
.boundary-context-controls button { padding:7px 9px; font-size:11px; }
[data-shortcut-route] { cursor:pointer; }
.personal-note { margin:38px auto 54px; padding:21px 24px; border-left:2px solid var(--safe); background:var(--caption); }
.personal-note h3 { margin:0 0 14px; font:500 18px/1.4 var(--sans); color:var(--heading); }
.personal-note > p:not(.section-number) { font-size:16px; line-height:1.75; margin:0 0 14px; }
.personal-note > p:last-child { margin-bottom:0; }
.personal-note a { color:var(--safe); text-decoration:underline; text-underline-offset:3px; }
#shortcut-paths [role="button"]:focus { outline:none; stroke:var(--ink); stroke-width:2.5; }
@media(min-width:900px) { .hero { padding-top:20px; } }
@media(max-width:650px) {
  .hero h1 { font-size:clamp(34px,9vw,44px); }
  .hero .hero-deck { font-size:18px; }
  .checkpoint-inspector { gap:14px; }
  .checkpoint-slider { flex-basis:100%; gap:8px; }
  .checkpoint-slider > span { white-space:nowrap; }
  .checkpoint-slider input { min-width:30px; }
  .checkpoint-slider output { min-width:70px; }
}

/* The shortcut geometry forms a quiet backdrop in the hero's side margins. */
.hero { position:relative; isolation:isolate; overflow:hidden; }
.hero > :not(.hero-background) { position:relative; z-index:1; }
.hero > .hero-title { display:flex; align-items:center; justify-content:center; width:min(1060px,100%); margin:0 auto 16px; }
.hero .hero-title h1 { width:auto; max-width:none; margin:0; font-size:clamp(40px,4.7vw,68px); }
.hero > .hero-background { position:absolute; inset:0; width:100%; max-width:none; margin:0; pointer-events:none; z-index:0; mask-image:linear-gradient(to right,#000 0%,#000 12%,transparent 33%,transparent 67%,#000 88%,#000 100%); }
.hero-art { position:absolute; bottom:0; width:clamp(280px,29vw,500px); height:100%; opacity:.29; overflow:visible; }
.hero-art-left { left:-25px; transform:rotate(-8deg) scale(1.08); }
.hero-art-right { right:-35px; transform:rotate(8deg) scale(1.08); }
.symbol-plane { fill:none; stroke:var(--line); stroke-width:.6; }
.symbol-boundary { fill:var(--safe-pale); fill-opacity:.4; stroke:var(--safe); stroke-width:.65; }
.symbol-contour { fill:none; stroke:var(--muted); stroke-width:.35; }
.symbol-safe,.symbol-shortcut { fill:none; stroke-width:.9; stroke-linecap:round; stroke-linejoin:round; }
.symbol-safe { stroke:var(--safe); }
.symbol-shortcut { stroke:var(--risk); }
.symbol-start { fill:var(--heading); }
.symbol-safe-end { fill:var(--safe); stroke:var(--paper); stroke-width:.6; }
.symbol-shortcut-end { fill:var(--risk); stroke:var(--paper); stroke-width:.5; }
@media(max-width:1150px) { .hero > .hero-background { display:none; } }

/* Major chapters and their evidence subsections need distinct visual levels. */
.essay-section { margin-bottom:88px; }
.essay-section > .prose:first-child > h2 { border-top:2px solid var(--line); padding-top:24px; margin:0 0 28px; font-size:clamp(32px,3.4vw,42px); line-height:1.16; letter-spacing:-.035em; text-wrap:balance; }
.essay-section > .prose:first-child > h2 .chapter-index { display:block; margin:0 0 14px; font-size:12px; font-weight:500; line-height:1; letter-spacing:.12em; }
.prose-subhead { font-size:24px; line-height:1.3; letter-spacing:-.02em; margin:42px 0 16px; color:var(--heading); text-wrap:balance; }
@media(max-width:650px) {
  .hero > .hero-title { margin-bottom:16px; }
  .hero .hero-title h1 { font-size:clamp(34px,9.8vw,46px); }
  .essay-section { margin-bottom:64px; }
  .essay-section > .prose:first-child > h2 { font-size:32px; padding-top:20px; margin-bottom:24px; }
  .prose-subhead { font-size:23px; margin-top:34px; }
}

.discussion-switch { margin: 4px 0 22px; flex-wrap: wrap; max-width: 100%; }

/* Optional setup stays small; the findings remain the main reading path. */
.experiment-setup { margin:18px 0 26px; border-block:1px solid var(--line); padding:11px 0; }
.experiment-setup > summary { cursor:pointer; color:var(--safe); font:500 13px/1.6 var(--sans); }
.experiment-setup > summary span { color:var(--muted); margin-left:12px; font-weight:400; }
.experiment-setup > div { padding-top:10px; }
.experiment-setup > div > p { font:400 14px/1.75 var(--sans); margin:10px 0; }
@media(max-width:650px) { .experiment-setup > summary span { display:block; margin-left:16px; font-size:12px; } }

/* A positive reward gap complements the boundary geometry on the right. */
.hero-art-left.reward-gap-art { left:0; transform:rotate(-5deg); opacity:.48; }
.reward-axis { fill:none; stroke:var(--muted); stroke-width:1; stroke-linecap:round; stroke-linejoin:round; }
.reward-axis-label { fill:var(--muted); font:400 10px var(--sans); letter-spacing:.04em; text-anchor:middle; }
.reward-bar { stroke-width:1; }
.reward-bar-compliant { fill:var(--safe-pale); stroke:var(--safe); }
.reward-bar-shortcut { fill:var(--risk-pale); stroke:var(--risk); }
.reward-face { font:29px 'Apple Color Emoji','Segoe UI Emoji','Noto Color Emoji',sans-serif; text-anchor:middle; }
.reward-guide { fill:none; stroke:var(--muted); stroke-width:.7; stroke-dasharray:2 3; }
.reward-gap-bracket { fill:none; stroke:var(--risk); stroke-width:1.3; stroke-linecap:round; }
.reward-gap-label { fill:var(--risk); font:500 11px var(--sans); }
.reward-route-label { fill:var(--muted); font:400 9px var(--sans); text-anchor:middle; }