:root{
  --bg:#f6f7f9; --ink:#0f1720; --muted:#4a5565; --rule:#d5dbe4; --accent:#0b6b4f; --on-accent:#ffffff; --surface:#ffffff;
  --display:"Bricolage Grotesque",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --body:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color-scheme:light;
  box-sizing:border-box; padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){--bg:#0f1418;--ink:#eef1f5;--muted:#a8b1bf;--rule:#27303a;--accent:#5fd0a5;--on-accent:#08130e;--surface:#151b21;color-scheme:dark}
}
:root[data-theme="dark"]{--bg:#0f1418;--ink:#eef1f5;--muted:#a8b1bf;--rule:#27303a;--accent:#5fd0a5;--on-accent:#08130e;--surface:#151b21;color-scheme:dark}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 72px);scroll-behavior:smooth}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;background:var(--bg);color:var(--ink);font:18px/1.6 var(--body);-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);background:var(--bg);z-index:10}
a{color:var(--accent);text-underline-offset:3px}
a:focus-visible,.btn:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:4px}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
header{position:sticky;top:env(safe-area-inset-top,0px);z-index:11;background:var(--bg);border-bottom:1px solid var(--rule)}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}
.name{font:700 19px var(--display);color:var(--ink);text-decoration:none}
nav{display:flex;align-items:center;gap:22px}
nav a.l{color:var(--ink);text-decoration:none;font-size:16px}
nav a.l:hover{text-decoration:underline}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:8px;background:var(--accent);color:var(--on-accent);font:600 16px var(--body);text-decoration:none;border:2px solid var(--accent)}
.btn.alt{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn.sm{min-height:40px;padding:0 16px;font-size:15px}
.hero{padding-top:72px;padding-bottom:64px;display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:48px;align-items:center}
.photo{grid-column:2;grid-row:1;width:100%;height:auto;aspect-ratio:1;object-fit:cover;border-radius:16px;background:var(--rule)}
.intro{grid-column:1;grid-row:1}
h1{font:700 clamp(2.6rem,8vw,5.6rem)/1 var(--display);letter-spacing:-.03em;margin:0 0 28px}
.lead{font:600 clamp(1.3rem,3vw,1.85rem)/1.3 var(--display);letter-spacing:-.01em;max-width:30em;margin:0 0 24px}
.hero p.proof{max-width:36em;color:var(--muted);margin:0 0 32px}
.hero p.proof strong{color:var(--ink);font-weight:650}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px}
.where{font-size:16px;color:var(--muted);margin:0}
section{padding:56px 0;border-top:1px solid var(--rule)}
h2{font:700 clamp(1.7rem,4vw,2.4rem)/1.1 var(--display);letter-spacing:-.02em;margin:0 0 32px}
.case{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:12px 48px;padding:36px 0;border-top:1px solid var(--rule)}
.case:first-of-type{border-top:0;padding-top:0}
.case h3{font:700 1.5rem/1.15 var(--display);letter-spacing:-.01em;margin:0 0 8px}
.meta p{margin:0 0 6px;color:var(--muted);font-size:16px}
.result{font:600 clamp(1.2rem,2.4vw,1.5rem)/1.35 var(--display);margin:0 0 16px;letter-spacing:-.01em}
.case ul{margin:0 0 16px;padding-left:1.1em;max-width:40em}
.case li{margin-bottom:8px}
.case a{font-weight:600}
dl.xp{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:0 48px;margin:0}
dl.xp dt,dl.xp dd{padding:16px 0;margin:0;border-top:1px solid var(--rule)}
dl.xp dt{font-weight:650}
dl.xp dd span{display:block;color:var(--muted);font-size:16px}
.about{max-width:40em;margin:0 0 32px}
.contact{padding-bottom:72px}
.contact h2{max-width:14em}
footer{border-top:1px solid var(--rule);padding:24px 0 32px;color:var(--muted);font-size:15px}
@media (max-width:760px){
  body{font-size:17px}
  .hero{padding-top:36px;padding-bottom:48px;grid-template-columns:1fr;gap:24px}
  .photo{grid-column:1;width:120px;border-radius:14px}
  .intro{grid-column:1;grid-row:2}
  .case,dl.xp{grid-template-columns:1fr}
  .case{gap:8px}
  dl.xp dt{padding-bottom:0}
  dl.xp dd{border-top:0;padding-top:4px}
  nav a.l{display:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* case study pages */
.crumb{font-size:16px;margin:32px 0 0}
.crumb a{color:var(--muted)}
.case-hero{padding:32px 0 40px}
.case-hero h1{font-size:clamp(2.2rem,6vw,4rem);margin-bottom:20px}
.case-hero .lead{margin-bottom:0}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:0 32px;margin:0;padding:24px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.facts div{padding:8px 0}
.facts dt{font-size:15px;color:var(--muted);margin:0}
.facts dd{margin:0;font-weight:600}
.prose{max-width:40em}
.prose p{margin:0 0 18px}
.prose h3{font:700 1.35rem/1.2 var(--display);margin:32px 0 10px;letter-spacing:-.01em}
.decisions{max-width:42em;margin:0;padding:0;list-style:none}
.decisions li{padding:18px 0;border-top:1px solid var(--rule)}
.decisions li:first-child{border-top:0;padding-top:0}
.decisions b{display:block;font:700 1.2rem/1.3 var(--display);margin-bottom:4px}
figure{margin:32px 0}
figure img{display:block;width:100%;height:auto;border:1px solid var(--rule);border-radius:10px;background:#fff}
figure.narrow img{max-width:560px}
figcaption{font-size:16px;color:var(--muted);margin-top:10px;max-width:44em}
.next{display:flex;flex-wrap:wrap;gap:12px 32px;justify-content:space-between;align-items:center}

/* diagrams */
.hub{border:1px solid var(--rule);border-radius:10px;padding:24px;background:var(--surface)}
.hub-core{background:var(--accent);color:var(--on-accent);font:700 1.1rem/1.2 var(--display);text-align:center;padding:16px;border-radius:8px;margin-bottom:16px}
.spokes{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px}
.spokes li{border:1px solid var(--rule);border-radius:8px;padding:10px 12px;font-size:16px;background:var(--bg)}
.flow{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.flow li{border:1px solid var(--rule);border-radius:8px;padding:14px 16px;background:var(--surface);position:relative}
.flow li span{display:block;font:700 1.1rem/1.2 var(--display);margin-bottom:4px}

/* journey lanes, paired figures, retention chart */
.lane-label{font:700 .8rem/1 var(--body);text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:22px 0 6px}
.lane{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 8px}
.chip{border:1px solid var(--rule);background:var(--surface);border-radius:8px;padding:10px 14px;font-size:16px;line-height:1.3}
.chip.go{border-color:var(--accent);color:var(--ink)}
.chip.stop{border-style:dashed;color:var(--muted)}
.ar{color:var(--muted)}
.pair{display:grid;grid-template-columns:1fr 2fr;gap:16px;align-items:start;margin:32px 0}
.pair figure{margin:0}
@media (max-width:700px){.pair{grid-template-columns:1fr}.pair figure.m img{max-width:260px}}
.chart{margin:32px 0}
.chart svg{width:100%;height:auto;display:block}
.chart .t{fill:var(--muted);font:13px var(--body)}
.chart .v{fill:var(--ink);font:600 14px var(--body)}
.chart .pre{fill:var(--muted);opacity:.55}
.chart .post{fill:var(--accent)}
.chart .grid{stroke:var(--rule);stroke-width:1}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin:24px 0}
.stats div{border:1px solid var(--rule);border-radius:8px;padding:14px 16px;background:var(--surface)}
.stats b{display:block;font:700 1.6rem/1.1 var(--display);margin-bottom:4px}
.stats span{font-size:15px;color:var(--muted)}
details.data{margin-top:12px;font-size:15px;color:var(--muted)}
details.data table{border-collapse:collapse;margin-top:8px}
details.data td,details.data th{border:1px solid var(--rule);padding:4px 10px;text-align:right}
.consent{position:fixed;left:0;right:0;bottom:0;z-index:50;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:14px max(16px,env(safe-area-inset-right,0px)) calc(14px + env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px));background:var(--surface);border-top:1px solid var(--rule);color:var(--ink)}
.consent p{margin:0;font-size:15px;max-width:40em}
.consent-no{background:none;border:0;color:var(--muted);font:inherit;font-size:15px;text-decoration:underline;cursor:pointer;padding:8px}