/* ERPAI portfolio v4 (10/02/2026) - written for prospective employers, on the ERPAI brand kit:
   white page, navy text (#0F172A), blue accent (#2563EB), teal for results (#14B8A6); dark is used only for films.
   Layout: short, outcome-first pages in the style of premium consulting case studies.
   Source of truth: deploy/portfolio/v4-src/v4.css (build.py copies it to site/assets/v4/v4.css). */
:root{
  --navy:#0F172A; --ink:#0F172A; --body:#334155; --muted:#64748B; --line:#E2E8F0; --line2:#CBD5E1;
  --paper:#FFFFFF; --wash:#F5F8FC; --tint:#EEF4FF;
  --blue:#2563EB; --blue-d:#1D4ED8; --blue-soft:#EAF1FE;
  --teal:#0D9488; --teal-b:#14B8A6; --teal-soft:#E6F7F5;
  --film:#0B1220;
  --display:"Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans:"IBM Plex Sans", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --wrap:1160px; --r:12px;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;background:var(--paper);color:var(--body);font-family:var(--sans);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
img,video{max-width:100%;display:block}
a{color:var(--blue);text-underline-offset:3px}
a:focus-visible,summary:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:4px}
p{margin:0}
h1,h2,h3,h4{margin:0;color:var(--ink);text-wrap:balance;font-weight:400}
h1{font-family:var(--display);font-size:clamp(42px,5.6vw,72px);line-height:1.02;letter-spacing:-.01em}
h2{font-family:var(--display);font-size:clamp(32px,3.8vw,48px);line-height:1.08}
h3{font-family:var(--display);font-size:clamp(24px,2.4vw,30px);line-height:1.15}
h4{font-family:var(--sans);font-weight:600;font-size:16px;line-height:1.4}
h1 em,h2 em{font-style:italic;color:var(--blue)}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:28px}
@media (max-width:640px){.wrap{padding-inline:18px}}
.label{font-family:var(--mono);font-size:11.5px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--blue)}
.label.t{color:var(--teal)} .label.m{color:var(--muted)}
.lede{font-size:20px;line-height:1.6;max-width:60ch;color:var(--body)}
.small{font-size:14.5px;color:var(--muted)}
.stack{display:grid;gap:18px;align-content:start}
.btns{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:999px;font-weight:600;font-size:15px;text-decoration:none;border:1.5px solid var(--navy);color:var(--navy);transition:background .15s,color .15s}
.btn:hover{background:var(--navy);color:#fff}
.btn.p{background:var(--blue);border-color:var(--blue);color:#fff}
.btn.p:hover{background:var(--blue-d);border-color:var(--blue-d)}
.go{font-weight:600;text-decoration:none}
.go::after{content:" \2192"}
.skip{position:absolute;left:-9999px;top:8px;z-index:100;background:#fff;color:var(--ink);padding:10px 14px;border-radius:6px;border:2px solid var(--blue)}
.skip:focus{left:12px}
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:60;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:66px}
.menu{display:flex;align-items:center;gap:2px}
.menu a{color:var(--body);text-decoration:none;font-size:14.5px;font-weight:500;padding:8px 11px;border-radius:999px}
.menu a:hover{color:var(--ink);background:var(--wash)}
.menu a[aria-current="page"]{color:var(--blue);background:var(--blue-soft)}
.menu a.cta{background:var(--blue);color:#fff;margin-left:8px;padding:8px 16px}
.menu a.cta:hover{background:var(--blue-d)}
.mnav{display:none}
@media (max-width:1000px){
  .menu{display:none}
  .mnav{display:block;position:relative}
  .mnav summary{list-style:none;cursor:pointer;font-weight:600;font-size:14.5px;padding:8px 16px;border:1.5px solid var(--line2);border-radius:999px;color:var(--ink)}
  .mnav summary::-webkit-details-marker{display:none}
  .mnav .sheet{position:absolute;right:0;top:calc(100% + 10px);background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:0 20px 44px rgba(15,23,42,.14);padding:8px;display:grid;min-width:250px}
  .mnav .sheet a{padding:11px 14px;color:var(--ink);text-decoration:none;border-radius:8px;font-weight:500}
  .mnav .sheet a:hover{background:var(--wash)}
}
.hero{padding-block:72px 64px;background:linear-gradient(180deg,var(--tint) 0%,#fff 72%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center}
@media (max-width:960px){.hero-grid{grid-template-columns:minmax(0,1fr);gap:36px}.hero{padding-block:52px 48px}}
.hero .stack{gap:22px}
.crumb{font-size:14px;color:var(--muted)}
.crumb a{color:var(--muted)}
.about{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media (max-width:820px){.about{grid-template-columns:minmax(0,1fr)}}
.about > div{padding:22px 24px 22px 0;display:grid;gap:4px}
.about > div + div{padding-left:24px;border-left:1px solid var(--line)}
@media (max-width:820px){.about > div,.about > div + div{padding:16px 0;border-left:0;border-top:1px solid var(--line)}.about > div:first-child{border-top:0}}
.about b{font-family:var(--display);font-weight:400;font-size:22px;color:var(--ink);line-height:1.2}
.about span{font-size:15px}
.about-gap{margin-top:48px}
.sec{padding-block:88px}
.sec.s{padding-block:64px}
.sec.wash{background:var(--wash)}
@media (max-width:760px){.sec{padding-block:60px}.sec.s{padding-block:48px}}
.head{display:grid;gap:14px;max-width:760px;margin-bottom:40px}
.film{margin:0;width:100%;position:relative;border-radius:16px;overflow:hidden;background:var(--film);box-shadow:0 28px 64px rgba(15,23,42,.22);aspect-ratio:16/9}
.film video{width:100%;height:100%;object-fit:cover}
.filmband{background:var(--film);padding-block:56px}
.filmband .film{max-width:960px;margin-inline:auto;box-shadow:none}
.causes{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
@media (max-width:1000px){.causes{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.causes{grid-template-columns:minmax(0,1fr)}}
.cause{background:#fff;border:1px solid var(--line);border-top:3px solid var(--blue);border-radius:10px;padding:18px 18px 20px;display:grid;gap:8px;align-content:start;text-decoration:none;color:inherit}
.cause:hover{border-color:var(--blue)}
.cause b{font-family:var(--display);font-weight:400;font-size:21px;color:var(--ink);line-height:1.2}
.cause span{font-size:14.5px}
.cause i{font-style:normal;font-size:14px;font-weight:600;color:var(--blue)}
.src{font-size:13.5px;color:var(--muted);margin-top:16px}
.themes{display:grid;gap:48px}
.theme{display:grid;grid-template-columns:280px minmax(0,1fr);gap:40px;align-items:start}
@media (max-width:900px){.theme{grid-template-columns:minmax(0,1fr);gap:18px}}
.theme-side{display:grid;gap:10px}
.theme-side img{border-radius:10px;aspect-ratio:16/9;object-fit:cover}
.theme-side h3 a{color:var(--ink);text-decoration:none}
.theme-side h3 a:hover{color:var(--blue)}
.theme-side p{font-size:15px}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
@media (max-width:640px){.cards{grid-template-columns:minmax(0,1fr)}}
.case-card{display:grid;gap:8px;align-content:start;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px 22px;text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s}
.case-card:hover{border-color:var(--blue);box-shadow:0 12px 28px rgba(37,99,235,.10)}
.case-card .q{font-family:var(--display);font-size:22px;line-height:1.2;color:var(--ink)}
.case-card .o{font-size:14.5px;color:var(--body)}
.case-card .o b{color:var(--teal);font-weight:600}
.case-card .go{font-size:14px;color:var(--blue)}
.cs-hero{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:56px;align-items:start}
@media (max-width:960px){.cs-hero{grid-template-columns:minmax(0,1fr);gap:28px}}
.glance{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 24px;display:grid;gap:0;box-shadow:0 14px 34px rgba(15,23,42,.06)}
.glance > div{padding-block:12px;border-top:1px solid var(--line);display:grid;gap:4px}
.glance > div:first-of-type{border-top:0;padding-top:4px}
.glance .label{font-size:10.5px}
.glance p{font-size:15px;color:var(--ink)}
.glance .chips{display:flex;flex-wrap:wrap;gap:6px}
.chips span{font-size:12.5px;font-weight:500;color:var(--ink);background:var(--wash);border:1px solid var(--line);padding:4px 10px;border-radius:999px}
.story{display:grid;grid-template-columns:220px minmax(0,1fr);gap:48px;padding-block:44px;border-top:1px solid var(--line)}
.story:first-child{border-top:0}
@media (max-width:860px){.story{grid-template-columns:minmax(0,1fr);gap:12px;padding-block:32px}}
.story h2{font-size:clamp(26px,2.6vw,32px)}
.story .body{display:grid;gap:14px;max-width:68ch;min-width:0}
.story ul{margin:0;padding-left:20px;display:grid;gap:8px}
.opts{display:grid;gap:10px}
.opt{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px;align-items:baseline}
.opt i{font-style:normal;font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;padding:3px 9px;border-radius:999px;background:#fff;color:var(--muted);border:1px solid var(--line2);white-space:nowrap}
.opt.chosen i{background:var(--blue);color:#fff;border-color:var(--blue)}
.opt.chosen span{font-weight:600;color:var(--ink)}
.result{background:var(--teal-soft);border-left:4px solid var(--teal-b);border-radius:0 10px 10px 0;padding:18px 22px;font-size:18px;color:var(--ink)}
.pull{font-family:var(--display);font-size:clamp(28px,3.4vw,40px);line-height:1.18;color:var(--ink);max-width:28ch}
.pull::before{content:"\201C";color:var(--blue)}
.pull::after{content:"\201D";color:var(--blue)}
.apply{background:var(--tint);border-radius:12px;padding:22px 24px;font-size:17px;color:var(--ink)}
.lessons{display:grid;gap:18px}
.lesson{display:grid;grid-template-columns:280px minmax(0,1fr) minmax(0,1fr);gap:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;scroll-margin-top:84px}
@media (max-width:960px){.lesson{grid-template-columns:minmax(0,1fr)}}
.lesson > div{padding:22px 24px;display:grid;gap:8px;align-content:start}
.lesson .t{background:var(--wash)}
.lesson .t b{font-family:var(--display);font-weight:400;font-size:24px;line-height:1.18;color:var(--ink)}
.lesson .ir{border-left:1px solid var(--line)}
@media (max-width:960px){.lesson .ir{border-left:0;border-top:1px solid var(--line)}}
.lesson .ll{grid-column:1/-1;border-top:1px solid var(--line);background:var(--blue-soft);padding:16px 24px;font-size:16px;color:var(--ink)}
.lesson .ll b{color:var(--blue)}
.steps3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
@media (max-width:860px){.steps3{grid-template-columns:minmax(0,1fr)}}
.step3{border-top:3px solid var(--blue);padding-top:18px;display:grid;gap:8px;align-content:start}
.step3:last-child{border-top-color:var(--teal-b)}
.step3 p{font-size:15.5px}
.timeline{list-style:none;margin:0;padding:0;display:grid;border-left:2px solid var(--line)}
.timeline li{position:relative;padding:0 0 26px 28px}
.timeline li::before{content:"";position:absolute;left:-7px;top:8px;width:12px;height:12px;border-radius:50%;background:#fff;border:2px solid var(--blue)}
.timeline li:last-child::before{background:var(--teal-b);border-color:var(--teal-b)}
.timeline b{display:block;font-family:var(--display);font-weight:400;font-size:24px;color:var(--ink);line-height:1.15}
.timeline p{max-width:66ch}
.decs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
@media (max-width:820px){.decs{grid-template-columns:minmax(0,1fr)}}
.dec{border:1px solid var(--line);border-radius:var(--r);padding:20px 22px;display:grid;gap:8px;align-content:start;background:#fff}
.dec .row{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
.dec h4{font-family:var(--display);font-weight:400;font-size:22px;line-height:1.2}
.v{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;padding:4px 9px;border-radius:999px;white-space:nowrap}
.v-right{background:var(--teal-soft);color:var(--teal)} .v-cost{background:var(--blue-soft);color:var(--blue-d)} .v-rev{background:var(--wash);color:var(--muted);border:1px solid var(--line2)}
.dec .alt{font-size:14px;color:var(--muted)}
.prose{display:grid;gap:16px;max-width:70ch}
.prose ul{margin:0;padding-left:20px;display:grid;gap:8px}
details.room{border:1px solid var(--line);border-radius:var(--r);background:#fff;margin-top:24px}
details.room summary{cursor:pointer;padding:18px 22px;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:12px}
details.room summary::-webkit-details-marker{display:none}
details.room summary::after{content:"+";font-size:22px;line-height:1;color:var(--blue)}
details.room[open] summary::after{content:"\2212"}
details.room .room-in{padding:0 22px 22px;display:grid;gap:12px;max-width:78ch}
.films{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.films .lead{grid-column:1/-1}
@media (max-width:820px){.films{grid-template-columns:minmax(0,1fr)}}
.filmcard{display:grid;gap:12px;align-content:start}
.brief{background:var(--wash);padding-block:44px 72px}
.sheet{max-width:880px;margin:0 auto;background:#fff;border:1px solid var(--line);border-top:4px solid var(--blue);border-radius:10px;padding:40px 48px;display:grid;gap:24px}
@media (max-width:640px){.sheet{padding:26px 20px}}
.brow{display:grid;grid-template-columns:180px minmax(0,1fr);gap:18px;padding-block:12px;border-top:1px solid var(--line)}
.brow b{color:var(--ink)}
@media (max-width:560px){.brow{grid-template-columns:minmax(0,1fr);gap:4px}}
.bfoot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;border-top:2px solid var(--navy);padding-top:14px;font-size:14px;color:var(--muted)}
.state{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;padding:5px 10px;border-radius:999px;white-space:nowrap}
.state::before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor}
.s-ok{background:var(--teal-soft);color:var(--teal)} .s-flag{background:var(--blue-soft);color:var(--blue-d)}
.panel{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 44px rgba(15,23,42,.08);padding:26px;display:grid;gap:10px}
.panel .big{font-family:var(--display);font-size:30px;line-height:1.15;color:var(--ink)}
.panel.is-ok{border-top:4px solid var(--teal-b)} .panel.is-flag{border-top:4px solid var(--blue)}
.checks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
@media (max-width:960px){.checks{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.checks{grid-template-columns:minmax(0,1fr)}}
.check{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;display:grid;gap:8px;align-content:start}
.check .row{display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;align-items:center}
.check .how{font-size:12.5px;color:var(--muted)}
.check p{font-size:15px}
.flow{display:flex;flex-wrap:wrap;align-items:stretch;gap:0}
.fnode{flex:1 1 150px;min-width:0;background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px;display:grid;gap:6px;align-content:start}
.fnode b{font-family:var(--display);font-weight:400;font-size:21px;color:var(--ink);line-height:1.15}
.fnode p{font-size:14px}
.fnode.hi{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.fnode.ok{border-color:var(--teal-b)}
.farrow{flex:0 0 30px;display:grid;place-items:center;color:var(--blue);font-size:20px}
.farrow::before{content:"\2192"}
@media (max-width:820px){.flow{flex-direction:column}.farrow{flex-basis:26px}.farrow::before{content:"\2193"}}
.layers{display:grid;gap:12px}
.layer{display:grid;grid-template-columns:230px minmax(0,1fr);gap:22px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px}
@media (max-width:760px){.layer{grid-template-columns:minmax(0,1fr);gap:10px}}
.layer .ln{display:grid;gap:3px}
.layer .ln b{font-family:var(--display);font-weight:400;font-size:23px;color:var(--ink);line-height:1.1}
.layer .ln span{font-size:13.5px;color:var(--muted)}
.layer.hi{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.parts{display:flex;flex-wrap:wrap;gap:6px}
.parts span{font-size:13px;font-weight:500;color:var(--ink);background:var(--wash);border:1px solid var(--line);padding:5px 11px;border-radius:999px}
.principles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
@media (max-width:860px){.principles{grid-template-columns:minmax(0,1fr)}}
.principles > div{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;display:grid;gap:6px;align-content:start}
.noscript{font-size:15px;color:var(--muted)}
.next{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:18px;padding-block:40px;border-top:1px solid var(--line)}
.next a.big{font-family:var(--display);font-size:32px;line-height:1.15;text-decoration:none;color:var(--ink)}
.next a.big:hover{color:var(--blue)}
.next a.big::after{content:" \2192";color:var(--blue)}
.contact{background:var(--navy);color:#fff;padding-block:80px}
.contact h2{color:#fff}
.contact h2 em{color:#93C5FD}
.contact p{color:#CBD5E1}
.contact .label{color:#5EEAD4}
.contact .btn{border-color:rgba(226,232,240,.45);color:#fff}
.contact .btn:hover{background:#fff;color:var(--navy)}
.contact .btn.p{background:#fff;color:var(--navy);border-color:#fff}
.contact .btn.p:hover{background:#DBEAFE}
.contact .mail{font-family:var(--mono);font-size:15px;color:#E2E8F0;user-select:all}
.contact .deeper a{color:#E2E8F0}
.foot{background:#0A1020;color:#A9B6CC;font-size:13px;line-height:1.65;padding-block:40px 32px}
.foot-top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;padding-bottom:20px;border-bottom:1px solid rgba(148,163,184,.22);margin-bottom:18px}
.foot-links{display:flex;flex-wrap:wrap;gap:6px 18px}
.foot-links a{color:#DBE5FF;text-decoration:none;font-size:14px}
.foot-links a:hover{text-decoration:underline}
.foot p{margin:0 0 10px;max-width:96ch}
.foot b{color:#E6EDFF;font-weight:600}
.foot .tagline{font-family:var(--display);font-style:italic;color:#DBE5FF;font-size:18px}

/* the big questions index (home) */
.bqs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
@media (max-width:900px){.bqs{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.bqs{grid-template-columns:minmax(0,1fr)}}
.bq{display:grid;gap:6px;align-content:start;background:#fff;border:1px solid var(--line);border-left:3px solid var(--blue);border-radius:10px;padding:16px 18px;text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s}
.bq:hover{border-color:var(--blue);box-shadow:0 10px 24px rgba(37,99,235,.10)}
.bq b{font-family:var(--display);font-weight:400;font-size:20px;line-height:1.22;color:var(--ink)}

/* concept-led design (10/02/2026): each question is answered by a named concept */
.cxi{display:grid;gap:56px}
.cxg{display:grid;grid-template-columns:260px minmax(0,1fr);gap:48px;align-items:start}
@media (max-width:900px){.cxg{grid-template-columns:minmax(0,1fr);gap:14px}}
.cxg-h{display:grid;gap:10px;position:sticky;top:96px}
@media (max-width:900px){.cxg-h{position:static}}
.cxg-t{font-family:var(--display);font-size:24px;line-height:1.2;color:var(--ink)}
.cxl{border-top:1px solid var(--ink)}
.cx{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr) 28px;gap:28px;align-items:baseline;padding:18px 4px;border-bottom:1px solid var(--line);text-decoration:none;color:inherit;transition:background .15s}
a.cx:hover{background:var(--wash)}
a.cx:hover .cx-n{color:var(--blue)}
a.cx:hover .cx-go{transform:translateX(4px);color:var(--blue)}
.cx-q{font-size:16.5px;color:var(--body)}
.cx-n{font-family:var(--display);font-size:24px;line-height:1.15;color:var(--ink);transition:color .15s}
.cx-go{color:var(--muted);transition:transform .15s,color .15s;justify-self:end}
.cx-head{padding:10px 4px;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
@media (max-width:640px){.cx{grid-template-columns:minmax(0,1fr) 20px;gap:4px 12px}.cx-q{grid-column:1;font-size:15px}.cx-n{grid-column:1;grid-row:2;font-size:22px}.cx-go{grid-row:1/3;grid-column:2;align-self:center}.cx-head{display:none}}
.case-card .cn{display:grid;gap:2px;font-family:var(--display);font-size:20px;line-height:1.2;color:var(--teal)}
.case-card .cn span{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.case-card .q{font-size:20px}
.concept{margin-top:10px;padding:18px 0 4px 22px;border-left:3px solid var(--teal-b);display:grid;gap:6px}
.concept .cname{font-family:var(--display);font-size:clamp(28px,3.4vw,40px);line-height:1.1;color:var(--ink)}
.concept .cidea{font-size:17px;color:var(--body);max-width:52ch}
.story .first{font-size:18px;color:var(--ink)}
.story .chosen{font-family:var(--display);font-size:clamp(22px,2.4vw,28px);line-height:1.22;color:var(--ink)}
.also{border-top:1px solid var(--line);padding-top:12px;display:grid;gap:6px}
.also ul{margin:0;padding-left:18px;font-size:14.5px;color:var(--muted);gap:4px}
ul.how{list-style:none;padding:0;gap:0}
ul.how li{display:grid;grid-template-columns:28px minmax(0,1fr);padding:14px 0;border-top:1px solid var(--line)}
ul.how li:first-child{border-top:0;padding-top:0}
ul.how li::before{content:"";width:8px;height:8px;margin-top:9px;background:var(--teal-b);border-radius:2px}

/* film-matched (10/02/2026): colours taken from the One Question film - deep indigo under the films,
   amber for the issue (the film's incident colour), and the film's blue-to-teal light trail on the concept index */
:root{--amber:#B45309;--film:#06080D}
.label.a{color:var(--amber)}
.filmband{background:radial-gradient(120% 140% at 50% 0%,#16245A 0%,#0B1433 45%,#06080D 100%)}
.cxl{border-top:0;background:linear-gradient(90deg,var(--blue),var(--teal-b)) top left/100% 2px no-repeat}
/* label-collision fix (10/02/2026): "The result" label shares the .t class with the lesson title cell */
.lesson .ir .label.t{background:none;padding:0}

/* four-answers (10/03/2026): how it works and why it matters, inside the concept block at the top of every case study */
.cdl{margin:12px 0 0;display:grid;gap:10px;max-width:60ch}
.cdl > div{display:grid;grid-template-columns:132px minmax(0,1fr);gap:14px;padding-top:10px;border-top:1px solid var(--line)}
.cdl dt{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);padding-top:5px}
.cdl dd{margin:0;font-size:16px;line-height:1.5;color:var(--ink)}
@media (max-width:640px){.cdl > div{grid-template-columns:minmax(0,1fr);gap:4px}}

/* benchmark-pass (10/03/2026): real headings that keep the label look, problem headline, diagram, jump bar */
.story h2.label{font-family:var(--mono);font-size:11.5px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);line-height:1.4}
.story h2.label.t{color:var(--teal)}
.story{scroll-margin-top:96px}
.story h3.sh{font-family:var(--display);font-weight:400;font-size:clamp(24px,2.6vw,30px);line-height:1.18;color:var(--ink)}
.story .flow{margin-top:4px}
#how .body{max-width:none}
@media (min-width:821px){#how .flow{flex-wrap:nowrap}#how .fnode{flex:1 1 0;padding:14px}#how .fnode b{font-size:19px}}
@media (max-width:820px){#how .fnode{padding:10px 14px;gap:2px}#how .fnode b{font-size:18px}#how .farrow{flex-basis:18px}}
.onpage{border-bottom:1px solid var(--line);background:#fff}
.onpage .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px;padding-block:14px}
.onpage a{font-size:14.5px;font-weight:500;color:var(--body);text-decoration:none;border-bottom:1px solid transparent}
.onpage a:hover{color:var(--blue);border-bottom-color:var(--blue)}
@media (max-width:640px){.onpage .wrap{gap:6px 14px}.onpage .label{width:100%}}

/* headshot (10/03/2026): brand-navy portrait beside the name */
.byline{display:flex;align-items:center;gap:14px}
.byline img.me{width:64px;height:64px;border-radius:50%;object-fit:cover;flex:none;box-shadow:0 0 0 3px #fff,0 8px 20px rgba(15,23,42,.18)}
.bhead{display:flex;align-items:center;gap:20px}
.bhead img.me{width:96px;height:96px;border-radius:50%;object-fit:cover;flex:none}
@media (max-width:640px){.bhead{align-items:flex-start}.bhead img.me{width:72px;height:72px}}

/* proof screenshots (10/03/2026): a real screen in a quiet browser-style frame */
.proof{margin:18px 0 0;display:grid;gap:10px}
.proof img{width:100%;height:auto;border:1px solid var(--line);border-top:14px solid var(--wash);border-radius:12px;box-shadow:0 18px 40px rgba(15,23,42,.10)}
.proof figcaption{font-size:14.5px;color:var(--muted)}
.proof figcaption a{font-weight:600}

/* real-proof film */
.proof .pf{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#04060B;box-shadow:0 18px 50px rgba(15,23,42,.18)}
.proof .pf iframe{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}

/* p14 media roles (10/03/2026): big film on home and themes, the case's own visual leads, small chapter clip beside the problem */
.hero-solo{max-width:880px}
.homefilm{padding-block:44px 52px}
.filmband.homefilm .film{max-width:none}
.qjump{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:22px}
.qjump .label{color:#94A3B8;margin-right:4px}
.qjump a{color:#E2E8F0;border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:8px 15px;font-size:14px;font-weight:600;text-decoration:none}
.qjump a:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.4)}
.fcap{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin:18px 0 0;color:#CBD5E1}
.fcap .label{color:#94A3B8}
.fcap b{font-family:var(--display);font-weight:400;font-size:20px;color:#F8FAFC}
.fcap a{color:#5EEAD4;font-weight:600}
.hero2{padding-block:8px 44px}
.leadviz{padding-block:36px 8px}
.leadviz .label{margin-bottom:14px}
.leadviz .proof{margin:0}
.story.split{grid-template-columns:220px minmax(0,1fr) 400px;align-items:start}
.clip{margin:0;display:grid;gap:12px}
.clip .film{border-radius:12px;box-shadow:0 14px 36px rgba(15,23,42,.18)}
.clip figcaption{display:grid;gap:3px;font-size:14px}
.clip figcaption b{font-family:var(--display);font-weight:400;font-size:18px;line-height:1.25;color:var(--ink)}
.clip figcaption a{font-weight:600}
@media (max-width:1100px){.story.split{grid-template-columns:220px minmax(0,1fr)}.story.split .clip{grid-column:2;max-width:520px}}
@media (max-width:860px){.story.split{grid-template-columns:minmax(0,1fr)}.story.split .clip{grid-column:auto;max-width:none}}
.ba{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ba>div{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff;display:grid;gap:6px}
.ba>div:last-child{border-color:rgba(13,148,136,.35);background:var(--teal-soft)}
.ba p{margin:0}
.ba p:last-child{font-size:17px;line-height:1.45;color:var(--ink)}
@media (max-width:640px){.ba{grid-template-columns:minmax(0,1fr)}}
.lesson .lx{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:8px 22px;margin:0;font-size:14px}
.lesson .lx a{font-weight:600}

/* p17 (10/03/2026): question ticker, quick-link rails, case-study menu, named films, film library */
.ticker{display:flex;align-items:center;background:#0F172A;color:#E2E8F0;overflow:hidden;font-size:14px}
.tk-l{flex:none;padding:11px 18px 11px 28px;background:#0F172A;position:relative;z-index:1;box-shadow:14px 0 18px #0F172A}
.tk-l span{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#5EEAD4;white-space:nowrap}
.tk{flex:1;min-width:0;overflow:hidden}
.tk-track{display:inline-flex;white-space:nowrap;animation:tk 220s linear infinite;will-change:transform}
.tk-dup{display:inline-flex}
.ticker:hover .tk-track,.ticker:focus-within .tk-track{animation-play-state:paused}
.tk a{display:inline-flex;align-items:baseline;gap:9px;padding:11px 24px;color:#E2E8F0;text-decoration:none;border-right:1px solid rgba(255,255,255,.10)}
.tk q{font-family:var(--display);font-style:italic;font-size:15px}
.tk a:hover q{color:#fff;text-decoration:underline;text-underline-offset:3px}
.tk i{color:#64748B;font-style:normal}
.tk b{color:#5EEAD4;font-weight:600}
@keyframes tk{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.tk-track{animation:none}.tk{overflow-x:auto}}
.rail{display:none}
@media (min-width:1460px){
  .rail{display:block;position:fixed;top:128px;width:calc((100vw - 1104px)/2 - 46px);max-width:250px;max-height:calc(100vh - 150px);overflow:auto;z-index:40;
    background:rgba(255,255,255,.94);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:14px;
    padding:14px 10px 12px;box-shadow:0 14px 34px rgba(15,23,42,.10);font-size:13px;line-height:1.3;scrollbar-width:thin}
  .rl{left:16px}.rr{right:16px}
}
.rail .rh{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:12px 6px 5px}
.rail .rh:first-child{margin-top:0}
.rail a{display:block;padding:5px 8px;border-radius:8px;color:var(--body);text-decoration:none}
.rail a:hover{background:var(--wash);color:var(--ink)}
.rail a[aria-current]{background:var(--blue-soft);color:var(--blue-d);font-weight:600}
.rail details{margin:0}
.rail summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:4px;padding-left:2px}
.rail summary::-webkit-details-marker{display:none}
.rail summary::before{content:"\25B8";color:var(--muted);font-size:10px;width:10px;transition:transform .15s}
.rail details[open] summary::before{transform:rotate(90deg)}
.rail summary a{flex:1;font-weight:600;color:var(--ink)}
.rail .rc{padding-left:12px;border-left:1px solid var(--line);margin:2px 0 6px 8px}
.rail .rc a{font-size:12.5px}
.rail .home{font-weight:600;color:var(--ink)}
.rail .rcta{margin-top:12px;text-align:center;background:var(--blue);color:#fff;font-weight:700}
.rail .rcta:hover{background:var(--blue-d);color:#fff}
.rail .nx{font-weight:600;color:var(--blue-d)}
.qrot{position:relative;margin:0 2px}
.qrot .qi{display:none;border:1px solid var(--line);border-radius:10px;padding:10px 10px 11px;background:#fff}
.qrot .qi.on,.qrot .qi:first-child:not(:has(~ .on)){display:grid;gap:6px;animation:qin .5s ease}
.qrot .qi span{font-family:var(--display);font-style:italic;font-size:14.5px;color:var(--ink);line-height:1.3}
.qrot .qi b{color:var(--teal);font-size:12.5px}
@keyframes qin{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
@media (min-width:1460px){.onpage{display:none}}
.dd{position:relative;display:inline-flex}
.dd::after{content:"";position:absolute;left:-10px;right:-10px;top:100%;height:20px}
.menu .mega{display:none;position:fixed;left:50%;transform:translateX(-50%);top:62px;width:min(1000px,calc(100vw - 48px));padding:20px 22px 14px;background:#fff;
  border:1px solid var(--line);border-radius:16px;box-shadow:0 24px 60px rgba(15,23,42,.18);z-index:80;text-align:left}
.dd:hover .mega,.dd:focus-within .mega{display:block}
.menu .mg{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.menu .mg div{display:grid;gap:1px;align-content:start}
.menu .mega a{display:block;padding:5px 8px;border-radius:8px;font-size:14px;font-weight:500;color:var(--body);background:none;text-decoration:none;white-space:normal}
.menu .mega a:hover{background:var(--wash);color:var(--ink)}
.menu .mega a.mt{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);margin-bottom:3px}
.menu .mgf{display:flex;gap:6px 18px;margin-top:12px;padding-top:10px;border-top:1px solid var(--line)}
.menu .mgf a{font-weight:700;color:var(--blue-d)}
.ftitle{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin:0 0 18px}
.ftitle .label{color:#94A3B8}
.ftitle b{font-family:var(--display);font-weight:400;font-size:clamp(22px,2.4vw,30px);color:#F8FAFC}
.leadviz .vt{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin:0 0 14px}
.leadviz .vt .label{margin:0}
.leadviz .vt b{font-family:var(--display);font-weight:400;font-size:clamp(22px,2.4vw,28px);color:var(--ink)}
.leadviz .vt .kind{font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--teal);background:var(--teal-soft);border-radius:999px;padding:3px 10px}
.lt{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin:30px 0 12px;font-weight:500}
.anims{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.anim{display:grid;gap:6px;align-content:start;text-decoration:none;color:var(--body);background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 10px 14px;transition:box-shadow .2s,transform .2s}
.anim:hover{box-shadow:0 16px 40px rgba(15,23,42,.14);transform:translateY(-2px)}
.anim img{width:100%;height:auto;border-radius:9px;display:block;background:#04060B}
.anim b{font-family:var(--display);font-weight:400;font-size:19px;line-height:1.2;color:var(--ink);padding:2px 4px 0}
.anim .q{font-size:14px;padding:0 4px;color:var(--muted)}

/* p18 */
.filmlink{margin:4px 0 0;font-size:15px}.filmlink a{font-weight:600}

/* p20 (10/04/2026): governance and guardrails */
.tiers{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
@media (max-width:980px){.tiers{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.tiers{grid-template-columns:minmax(0,1fr)}}
.tier{display:grid;gap:8px;align-content:start;padding:18px 18px 16px;border:1px solid var(--line);border-top:4px solid #14B8A6;border-radius:14px;background:#fff;text-decoration:none;color:var(--body);transition:box-shadow .2s,transform .2s}
.tier:hover{box-shadow:0 16px 40px rgba(15,23,42,.12);transform:translateY(-2px)}
.tier b{font-family:var(--display);font-weight:400;font-size:21px;line-height:1.2;color:var(--ink)}
.tier p{margin:0;font-size:15px}
.tier i{font-style:normal;font-size:13.5px;font-weight:600;color:var(--blue-d)}
.t-ok{border-top-color:#14B8A6}.t-ask{border-top-color:#2563EB}.t-lim{border-top-color:#F59E0B}.t-no{border-top-color:#E11D48}
.t-ok .label{color:#0D9488}.t-ask .label{color:#2563EB}.t-lim .label{color:#B45309}.t-no .label{color:#E11D48}
.glist{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
@media (max-width:980px){.glist{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.glist{grid-template-columns:minmax(0,1fr)}}
.gi{display:grid;gap:6px;align-content:start;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:#fff;text-decoration:none;color:var(--body)}
.gi:hover{border-color:var(--blue)}
.gi b{color:var(--ink);font-size:16.5px}
.gi p{margin:0;font-size:14.5px}
.gi span{font-size:13px;font-weight:600;color:var(--blue-d)}
.govband{background:linear-gradient(180deg,#fff,#F5F8FC)}

/* p21 (10/04/2026, Jeff: "the font is a little hard to read, especially for things we want to call out")
   Rule: the display serif stays for big headlines only (28px and up); every callout, card title, answer and label
   uses the sans at a heavier weight; small labels are bigger, bolder and darker; the teal used for text is darkened
   to pass contrast (the concept name is the answer, so it must be the easiest thing to read). */
:root{--teal-text:#0F766E;--muted-text:#475569}
.label{font-size:12px;font-weight:600;letter-spacing:.11em}
.label.m{color:#64748B}
.label.t,.story h2.label.t{color:var(--teal-text)}
.cdl dt,.glance .label,.rail .rh,.cx-head span,.case-card .cn span{font-size:11.5px;font-weight:600;letter-spacing:.11em;color:var(--muted-text)}
.cdl dd{font-size:16.5px}
/* the home index: question and answer side by side */
.cx-q{font-size:16.5px;color:#334155}
.cx-n{font-family:var(--sans);font-size:18px;font-weight:600;line-height:1.3;color:#1D4ED8}
.cxg-t{font-family:var(--sans);font-size:19px;font-weight:600;line-height:1.35}
/* cards and callouts */
.case-card .q{font-family:var(--sans);font-size:18px;font-weight:600;line-height:1.35;color:var(--ink)}
.case-card .cn{font-family:var(--sans);font-size:17px;font-weight:600;line-height:1.3;color:var(--teal-text)}
.tier b{font-family:var(--sans);font-size:19px;font-weight:600;line-height:1.3}
.tier p{font-size:15.5px;color:#334155}
.cause b{font-family:var(--sans);font-size:18px;font-weight:600;line-height:1.3}
.anim b{font-family:var(--sans);font-size:17.5px;font-weight:600;line-height:1.3}
.anim .q{font-size:15px;color:var(--muted-text)}
.gi b{font-size:17px}
.gi p{font-size:15px;color:#334155}
.lesson .t b{font-family:var(--sans);font-size:20px;font-weight:600;line-height:1.3}
.dec h4{font-family:var(--sans);font-size:18px;font-weight:600;line-height:1.3}
.step3 h3{font-family:var(--sans);font-weight:600;font-size:19px;line-height:1.3}
.leadviz .vt b{font-size:clamp(24px,2.4vw,30px)}
.proof figcaption,.src{font-size:15px;color:var(--muted-text)}
.filmlink a{font-size:16px}
/* the ticker and the side cards: plain, solid type that reads at a glance */
.tk q{font-family:var(--sans);font-style:normal;font-size:14.5px;font-weight:500;color:#F1F5F9}
.tk b{font-weight:600}
.qrot .qi span{font-family:var(--sans);font-style:normal;font-size:14px;font-weight:600;line-height:1.35}
.qrot .qi b{color:var(--teal-text);font-size:13.5px}
.rail .rc a{font-size:13px}

/* p22 (10/04/2026, Jeff: "do all 6"): smart side panels, scroll reveals, living hero, self-drawing diagrams,
   hover effects and a reading bar, the standard-tools strip, and the story spine on case studies.
   Rules: nothing moves while a paragraph is being read, no effect longer than about half a second,
   and every effect switches off for visitors who ask their computer to reduce motion. */

/* reading progress bar, just under the sticky menu */
.readbar{position:fixed;left:0;right:0;top:66px;height:3px;background:linear-gradient(90deg,#2563EB,#14B8A6);transform-origin:0 50%;transform:scaleX(0);z-index:59;pointer-events:none}

/* smart side panels */
.rail .rtab,.rail .dots{display:none}
@media (min-width:1460px){
  .rail{transition:width .3s ease,padding .3s ease,box-shadow .3s ease}
  .rail.compact:not(.open){width:46px;padding:10px 4px;overflow:hidden}
  .rail.compact:not(.open) > :not(.rtab):not(.dots){display:none}
  .rail.compact .rtab{display:flex}
  .rail.open .rtab{display:none}
  .rtab{all:unset;box-sizing:border-box;cursor:pointer;display:flex;align-items:center;justify-content:center;width:100%;padding:8px 0}
  .rtab span{writing-mode:vertical-rl;transform:rotate(180deg);font:600 12px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--blue-d);white-space:nowrap}
  .rtab:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:8px}
  .rail.compact:not(.open) .dots{display:grid;gap:12px;justify-items:center;margin:8px 0 4px}
  .dots a{display:block;width:9px;height:9px;padding:0;border-radius:50%;background:#CBD5E1;transition:background .2s,box-shadow .2s}
  .dots a.on{background:var(--blue);box-shadow:0 0 0 4px rgba(37,99,235,.18)}
  .rail.compact.open{box-shadow:0 26px 60px rgba(15,23,42,.22)}
}

/* 1 scroll reveals (classes are only added by the script, so nothing is hidden without it) */
.rv{transition:opacity .55s ease,transform .55s ease,box-shadow .2s ease,border-color .2s ease}
.rv:not(.in){opacity:0;transform:translateY(18px)}

/* 2 living hero (home page) */
.hero.alive{position:relative;overflow:hidden}
.hero.alive > .wrap{position:relative;z-index:1}
.heroviz{position:absolute;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}

/* 3 diagrams that draw themselves */
.fnode b{font-family:var(--sans);font-weight:600;font-size:17px;line-height:1.3}
.flow.drawable > *{opacity:0;transform:translateY(10px);transition:opacity .45s ease,transform .45s ease;transition-delay:calc(var(--i, 0) * 120ms)}
.flow.drawable > .farrow{transform:scale(.2)}
.flow.drawn > *,.flow.drawn > .farrow{opacity:1;transform:none}
.flow.drawn .fnode.hi{animation:nodepulse 1.4s ease calc(var(--i, 0) * 120ms + .25s) 1}
@keyframes nodepulse{0%{box-shadow:0 0 0 3px var(--blue-soft),0 0 0 3px rgba(37,99,235,.35)}100%{box-shadow:0 0 0 3px var(--blue-soft),0 0 0 16px rgba(37,99,235,0)}}

/* 4 hover effects */
.case-card,.gi,.cause,.anim,.tier{transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.case-card:hover,.gi:hover,.cause:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(15,23,42,.12)}
.go,.filmlink a,.src a,.lesson .lx a{text-decoration:none;background:linear-gradient(currentColor,currentColor) 0 100%/0 1.5px no-repeat;transition:background-size .25s ease}
.go:hover,.filmlink a:hover,.src a:hover,.lesson .lx a:hover{background-size:100% 1.5px}
.btn{transition:transform .15s ease,box-shadow .2s ease,background .2s ease}
.btn.p:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(37,99,235,.30)}
.cx .cx-go{transition:transform .2s ease,color .2s ease}

/* 5 built on standard tools */
.tools{display:flex;align-items:center;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow:hidden}
.tools-l{flex:none;padding:16px 20px 16px 28px;background:#fff;position:relative;z-index:1;box-shadow:16px 0 18px #fff}
.tools-l span{font-family:var(--mono);font-size:11.5px;font-weight:600;letter-spacing:.11em;text-transform:uppercase;color:#475569;white-space:nowrap}
.tools-m{flex:1;min-width:0;overflow:hidden}
.tools-t{display:inline-flex;white-space:nowrap;animation:tk 80s linear infinite;will-change:transform}
.tools-d{display:inline-flex}
.tools:hover .tools-t{animation-play-state:paused}
.tl{display:inline-flex;align-items:center;gap:10px;padding:14px 26px;font-weight:600;font-size:15px;color:#334155}
.tl img{width:30px;height:30px;border-radius:8px;background:#fff;box-shadow:0 0 0 1px var(--line);padding:4px;box-sizing:border-box;object-fit:contain}

/* 6 the story spine on case studies */
@media (min-width:1100px){
  .story-grid{display:grid;grid-template-columns:250px minmax(0,1fr);gap:56px;align-items:start}
  .story-col{min-width:0}
  .story-col .story{grid-template-columns:minmax(0,1fr);gap:10px}
  .spine{position:sticky;top:100px;align-self:start;display:grid;gap:16px;padding-top:44px}
  .spine ol{list-style:none;margin:0;padding:0 0 0 24px;position:relative;display:grid;gap:15px}
  .spine ol::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:var(--line)}
  .spine .fill{position:absolute;left:6px;top:6px;width:2px;max-height:calc(100% - 12px);height:0;background:linear-gradient(#2563EB,#14B8A6)}
  .spine li{position:relative;font-size:14.5px;font-weight:500;color:#64748B;cursor:pointer;transition:color .25s ease}
  .spine li:hover{color:var(--ink)}
  .spine li::before{content:"";position:absolute;left:-23px;top:4px;width:10px;height:10px;border-radius:50%;background:#fff;border:2px solid #CBD5E1;transition:all .25s ease}
  .spine li.done::before{border-color:#2563EB;background:#2563EB}
  .spine li.on{color:var(--ink);font-weight:600}
  .spine li.on::before{border-color:#2563EB;background:#fff;box-shadow:0 0 0 5px rgba(37,99,235,.16)}
  .spine-card{border:1px solid var(--line);border-left:4px solid #2563EB;border-radius:12px;padding:14px 16px;background:#fff;box-shadow:0 12px 30px rgba(15,23,42,.08);min-height:96px;transition:border-color .3s ease}
  .spine-card .sc-l{display:block;font:600 11.5px var(--mono);letter-spacing:.11em;text-transform:uppercase;color:#475569;margin-bottom:6px}
  .spine-card .sc-t{margin:0;font-size:16px;font-weight:600;line-height:1.4;color:var(--ink);transition:opacity .2s ease}
  .spine-card.k-problem{border-left-color:#E11D48}
  .spine-card.k-built{border-left-color:#F59E0B}
  .spine-card.k-result,.spine-card.k-apply{border-left-color:#14B8A6}
}

@media (prefers-reduced-motion:reduce){
  .tools-t{animation:none}.tools-m{overflow-x:auto}
  .rail,.spine li,.spine li::before,.spine-card,.spine-card .sc-t,.case-card,.gi,.cause,.btn{transition:none}
}

/* p23 (10/04/2026, Jeff: "the side panel looks weird, it doesn't scroll right with the page", "icons scroll slowly")
   The panels now live in the page (sticky inside a full-height side column) instead of being pinned to the window,
   so they move with the page when it is zoomed or panned. Compact state is a small horizontal card, not a vertical tab.
   The tools strip and the question ticker always drift slowly (pause on hover) instead of showing a scrollbar. */
main#main{position:relative}
.railcol{display:none}
@media (min-width:1460px){
  .railcol{display:block;position:absolute;top:0;bottom:0;z-index:40;pointer-events:none;width:calc((100vw - 1104px)/2 - 46px);max-width:250px}
  .railcol.l{left:16px}.railcol.r{right:16px}
  .railcol .rail{position:sticky;top:96px;left:auto;right:auto;width:100%;max-width:none;max-height:calc(100vh - 116px);pointer-events:auto}
  .rail.compact:not(.open){width:auto;padding:8px 12px;overflow:hidden}
  .railcol.l{display:flex;flex-direction:column;align-items:flex-start}
  .railcol.r{display:flex;flex-direction:column;align-items:flex-end}
  .rtab span{writing-mode:horizontal-tb;transform:none;font-size:12px}
  .rtab span::before{content:"\2630  ";font-family:var(--sans)}
  .railcol.r .rtab span::before{content:""}
  .rail.compact:not(.open) .dots{display:flex;gap:8px;justify-content:center;margin:6px 0 2px}
}
/* the ticker sits under the header; the panels start below it */
.tools-t{animation-duration:140s}
@media (prefers-reduced-motion:reduce){
  .tools-t{animation:tk 200s linear infinite}.tools-m{overflow:hidden}
  .tk-track{animation:tk 300s linear infinite}.tk{overflow:hidden}
}

/* p24 (10/04/2026, Jeff: no left-right scrolling, a calmer way to show the tools, a wider page, clearer sections) */
/* the page can never be pushed sideways */
html,body{overflow-x:clip}
/* a wider page on big screens, so the content keeps the width the top of the page sets */
@media (min-width:1760px){:root{--wrap:1360px}}
@media (min-width:1460px){.railcol{width:calc((100vw - var(--wrap))/2 - 36px)}}
/* clear sections: more room, alternating backgrounds, an accent mark on every section heading */
@media (min-width:900px){.sec{padding-block:104px}.sec.s{padding-block:88px}}
.sec.wash{background:#EEF3FA;border-top:1px solid #DFE7F2;border-bottom:1px solid #DFE7F2}
.sec .head{position:relative}
.sec .head > .label:first-child{display:inline-flex;align-items:center;gap:12px}
.sec .head > .label:first-child::before{content:"";width:32px;height:3px;border-radius:2px;background:linear-gradient(90deg,#2563EB,#14B8A6)}
#case-studies{border-top:1px solid var(--line)}
/* governance gets its own dark band so it stands apart */
.govband{background:radial-gradient(120% 140% at 50% 0%,#16245A 0%,#0B1433 50%,#06080D 100%);color:#CBD5E1}
.govband .head h2,.govband .head h2 em{color:#F8FAFC}
.govband .head h2 em{color:#93C5FD}
.govband .head .lede{color:#CBD5E1}
.govband .head > .label:first-child{color:#5EEAD4}
.govband .src a{color:#93C5FD}
.govband .tier{box-shadow:0 18px 40px rgba(0,0,0,.25)}
/* the standard tools: a row that arrives, then steps back into a compact stack */
.tools{display:flex;align-items:center;justify-content:center;gap:22px;padding:26px 28px;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow:hidden;min-height:96px;cursor:default}
.tools-l{padding:0;box-shadow:none;background:none}
.tools-row{display:flex;align-items:center;flex-wrap:nowrap}
.tools .tl{display:inline-flex;align-items:center;gap:0;padding:0;font-size:14.5px;font-weight:600;color:#334155;white-space:nowrap;
  transition:margin .6s cubic-bezier(.2,.8,.2,1),transform .6s cubic-bezier(.2,.8,.2,1),opacity .6s ease;transition-delay:calc(var(--i, 0) * 35ms)}
.tools .tl img{width:40px;height:40px;border-radius:12px;background:#fff;padding:7px;box-sizing:border-box;object-fit:contain;
  box-shadow:0 0 0 2px #fff,0 4px 12px rgba(15,23,42,.14)}
.tools .tl span{display:inline-block;overflow:hidden;max-width:0;opacity:0;margin-left:0;transition:max-width .6s ease,opacity .4s ease,margin .6s ease}
.tools.rest .tl + .tl{margin-left:-12px}
.tools.show .tools-row{flex-wrap:wrap;justify-content:center;row-gap:14px;column-gap:26px;max-width:min(1100px,calc(100vw - 340px))}
.tools.show .tl + .tl{margin-left:0}
.tools.show .tl span{max-width:220px;opacity:1;margin-left:9px}
.tools.show .tl{transform:translateY(0)}
.tools.rest .tl:hover{transform:translateY(-4px);z-index:1}
.tools.rest::after{content:"Point here to see them";font-size:13px;color:#64748B;margin-left:6px;white-space:nowrap}
.tools.show::after{content:"";margin:0}


/* p25 (10/04/2026): lessons teaser on the home page, and a calmer phone layout */
.lteaser{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
@media (max-width:980px){.lteaser{grid-template-columns:minmax(0,1fr)}}
.lt-i{display:grid;gap:5px;align-content:start;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:#fff;text-decoration:none;color:var(--body);transition:transform .2s ease,box-shadow .2s ease}
.lt-i:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(15,23,42,.12)}
.lt-i b{font-size:17px;font-weight:600;line-height:1.3;color:var(--ink)}
.lt-i i{font-style:normal;font-size:14.5px;color:#475569}
@media (max-width:700px){
  .sec{padding-block:52px}.sec.s{padding-block:44px}
  .cx-head{display:none}.cx{padding:12px 2px}.cx-q{font-size:14.5px}.cx-n{font-size:16px}
  .cxi{gap:34px}.cxg-t{font-size:17px}
  .tiers,.glist{gap:10px}.tier p,.gi p{font-size:14.5px}
  .lt-i i{display:none}
  .about{gap:14px}
}

/* p26 (10/04/2026): privacy line; side panels start below the question ticker */
.privacy{font-size:12.5px;color:#94A3B8;margin:14px 0 0}
@media (min-width:1460px){.railcol{top:56px}}