:root{
  color-scheme:light;
  --bg:#FAFAF8;--ink:#1C1C1C;--ink2:#55554F;--mut:#6F6F69;--dim:#8E8E87;
  --line:#E4E4DF;--card:#FFFFFF;--fill:#F2F2EF;--paper:#F3F1EC;--foot:#ECECE7;
  --ok:#2FA36B;--wip:#C98A12;--plan:#8E8E87;
  --accent:#1C1C1C;--tint:#F2F2EF;
  --ease:cubic-bezier(.2,.8,.2,1);--spring:cubic-bezier(.3,1.45,.45,1);
  --font:"Outfit",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:18px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:10px}
.wrap{max-width:1200px;margin-inline:auto;padding-inline:32px}
.muted{color:var(--mut)}
.pill{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:999px;font-size:15px;font-weight:500;text-decoration:none;white-space:nowrap;transition:background .2s,transform .2s var(--ease)}
.pill.line{border:1px solid #DADAD4;background:var(--card)}
.pill.line:hover{background:var(--fill)}
.pill.dark{background:var(--ink);color:#fff}
.pill.dark:hover{background:#3A3A36}

/* nav */
.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:rgba(250,250,248,.88);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);transition:box-shadow .3s}
.nav.stuck{box-shadow:0 1px 0 var(--line)}
.nav .wrap{height:72px;display:flex;align-items:center;gap:16px}
.brand{font-weight:600;font-size:18px;letter-spacing:-.015em;text-decoration:none;white-space:nowrap}
.crumb{display:flex;align-items:center;gap:8px;font-size:15px;color:var(--mut);min-width:0}
.crumb a{text-decoration:none}.crumb a:hover{color:var(--ink)}
.crumb .cur{color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav .sp{margin-left:auto}
.readbar{position:absolute;left:0;bottom:-1px;height:2px;background:var(--ink);transform-origin:left;transform:scaleX(0)}

/* hero */
.hero{padding-block:64px 0}
.kicker{display:inline-flex;align-items:center;gap:10px;font-size:15px;color:var(--mut)}
.kicker .tag{height:28px;padding:0 12px;border-radius:999px;background:var(--tint);color:var(--ink);display:inline-flex;align-items:center;font-weight:500;font-size:13px}
.hero h1{font-size:clamp(52px,8vw,112px);line-height:.98;font-weight:300;letter-spacing:-.05em;margin:24px 0 0}
.hero .sub{font-size:clamp(21px,2.4vw,28px);line-height:1.3;font-weight:300;letter-spacing:-.015em;color:var(--ink2);max-width:760px;margin:24px 0 0;text-wrap:balance}
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line)}
.facts dt{font-size:14px;color:var(--mut)}
.facts dd{margin:4px 0 0;font-size:17px;font-weight:500;line-height:1.35}
.status{display:inline-flex;align-items:center;gap:8px}
.status i{width:8px;height:8px;border-radius:99px;background:var(--ok)}
.status.wip i{background:var(--wip)}
.cover{margin-top:56px;border-radius:32px;overflow:hidden;background:var(--tint);position:relative}
.cover img{width:100%;height:auto}
.cover.pad{padding:48px 48px 0}
.cover.crop img{aspect-ratio:16/10;object-fit:cover;object-position:var(--pos,50% 50%)}
@media (max-width:680px){.cover.crop img{aspect-ratio:4/5}}
.cover.pad img{border-radius:16px 16px 0 0;box-shadow:0 30px 60px -30px rgba(28,28,28,.35)}

/* layout: toc + body */
.layout{display:grid;grid-template-columns:200px minmax(0,1fr);gap:64px;margin-top:96px}
.layout>.body{min-width:0}
.toc{position:sticky;top:104px;align-self:start;display:flex;flex-direction:column;gap:2px}
.toc a{font-size:14px;color:var(--mut);text-decoration:none;padding:6px 12px;border-radius:999px;transition:color .2s,background .2s}
.toc a:hover{color:var(--ink)}
.toc a.on{color:var(--ink);background:var(--fill)}
.body>section{padding-bottom:104px}
.eyebrow{font-size:14px;color:var(--mut);font-weight:500;letter-spacing:.02em}
h2{font-size:clamp(34px,4.2vw,52px);line-height:1.04;font-weight:300;letter-spacing:-.035em;margin:10px 0 0;text-wrap:balance}
.lead{font-size:21px;line-height:1.55;color:var(--ink2);max-width:760px;margin:24px 0 0}
.prose{max-width:720px}
.prose p{margin:18px 0 0;color:var(--ink2)}
.prose p b{color:var(--ink);font-weight:500}
.pull{margin:40px 0 0;padding:28px 32px;border-radius:24px;background:var(--tint);font-size:24px;line-height:1.35;font-weight:300;letter-spacing:-.015em;max-width:820px}
.pull cite{display:block;margin-top:12px;font-size:14px;font-style:normal;color:var(--mut);letter-spacing:0}

/* audience */
.aud{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:36px}
.card{background:var(--card);border:1px solid #EAEAE5;border-radius:24px;padding:28px}
.card .lbl{font-size:13px;color:var(--mut);font-weight:500}
.card h3{font-size:24px;font-weight:500;letter-spacing:-.02em;margin:8px 0 0;line-height:1.2}
.card p{margin:10px 0 0;font-size:16px;color:var(--ink2);line-height:1.55}
.card .inf{display:inline-block;margin-top:14px;font-size:12px;color:var(--mut);border:1px dashed #CFCFC8;border-radius:999px;padding:2px 10px}

/* use cases */
.uses{margin-top:36px;display:flex;flex-direction:column}
.use{display:grid;grid-template-columns:220px minmax(0,1fr);gap:32px;padding:24px 0;border-top:1px solid var(--line)}
.use:last-child{border-bottom:1px solid var(--line)}
.use .who{font-size:15px;color:var(--mut)}
.use .who b{display:block;color:var(--ink);font-weight:500;font-size:18px;margin-bottom:2px}
.use p{margin:0;font-size:18px;color:var(--ink2)}

/* gallery / figures */
.fig{margin:40px 0 0}
.fig .frame{border-radius:24px;overflow:hidden;background:var(--tint);border:1px solid #EAEAE5}
.fig .frame.pad{padding:32px;display:flex;justify-content:center;align-items:center}
.fig .frame.pad img{border-radius:12px;box-shadow:0 20px 50px -24px rgba(28,28,28,.35);max-height:720px;width:auto}
.fig .frame.dark{background:#1C1C1C;border-color:#1C1C1C}
.fig figcaption{margin-top:12px;font-size:15px;color:var(--mut);max-width:720px}
.pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.pair .fig{margin-top:40px}
.trio{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}

/* features */
.feats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:36px}
.feat{background:var(--card);border:1px solid #EAEAE5;border-radius:24px;padding:26px 28px}
.feat h3{font-size:20px;font-weight:500;letter-spacing:-.015em;margin:0}
.feat p{margin:8px 0 0;font-size:16px;color:var(--ink2);line-height:1.55}

/* system diagram */
.sys{margin-top:40px;background:var(--card);border:1px solid #EAEAE5;border-radius:28px;padding:36px;overflow-x:auto}
.flow{display:flex;align-items:stretch;gap:0;min-width:640px}
.node{flex:1;background:var(--tint);border-radius:18px;padding:18px 20px;min-width:0}
.node .t{font-size:13px;color:var(--mut);font-weight:500}
.node .n{font-size:18px;font-weight:500;margin-top:4px;letter-spacing:-.01em;line-height:1.25}
.node .d{font-size:14px;color:var(--ink2);margin-top:6px;line-height:1.45}
.arrow{width:44px;flex:none;display:flex;align-items:center;justify-content:center;color:var(--dim)}
.arrow svg{width:24px;height:24px}
.stack{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.stack span{height:34px;padding:0 14px;border-radius:999px;border:1px solid #DADAD4;display:inline-flex;align-items:center;font-size:14px;background:var(--card)}

/* decisions */
.decs{margin-top:36px;display:grid;gap:16px}
.dec{background:var(--card);border:1px solid #EAEAE5;border-radius:24px;overflow:hidden}
.dec summary{list-style:none;cursor:pointer;padding:26px 28px;display:flex;gap:20px;align-items:flex-start}
.dec summary::-webkit-details-marker{display:none}
.dec summary h3{flex:1;font-size:22px;font-weight:500;letter-spacing:-.02em;margin:0;line-height:1.25}
.dec summary .pm{flex:none;width:32px;height:32px;border-radius:99px;background:var(--fill);position:relative;margin-top:-2px;transition:background .2s}
.dec summary .pm::before,.dec summary .pm::after{content:"";position:absolute;left:10px;right:10px;top:15px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s var(--ease)}
.dec summary .pm::after{transform:rotate(90deg)}
.dec[open] summary .pm::after{transform:rotate(0)}
.dec .dd{padding:0 28px 26px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.dec .dd div{font-size:16px;color:var(--ink2);line-height:1.55}
.dec .dd b{display:block;font-size:13px;color:var(--mut);font-weight:500;margin-bottom:4px}

/* progress */
.prog{margin-top:36px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.col{background:var(--card);border:1px solid #EAEAE5;border-radius:24px;padding:24px}
.col h3{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:500;margin:0}
.col h3 i{width:8px;height:8px;border-radius:99px;background:var(--ok)}
.col.wip h3 i{background:var(--wip)}
.col.plan h3 i{background:var(--plan)}
.col ul{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-direction:column;gap:10px}
.col li{font-size:15px;line-height:1.45;color:var(--ink2);padding-left:16px;position:relative}
.col li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:99px;background:#CFCFC8}
.timeline{list-style:none;margin:40px 0 0;padding:0;position:relative}
.timeline::before{content:"";position:absolute;left:5px;top:8px;bottom:8px;width:2px;background:var(--line)}
.timeline li{position:relative;padding:0 0 22px 32px;display:grid;grid-template-columns:120px minmax(0,1fr);gap:16px}
.timeline li::before{content:"";position:absolute;left:0;top:7px;width:12px;height:12px;border-radius:99px;background:var(--bg);border:2px solid var(--ink)}
.timeline .when{font-size:14px;color:var(--mut);font-variant-numeric:tabular-nums}
.timeline .what{font-size:16px;color:var(--ink2)}
.timeline .what b{color:var(--ink);font-weight:500}

/* numbers */
.nums{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:36px}
.num{background:var(--card);border:1px solid #EAEAE5;border-radius:24px;padding:24px}
.num .v{font-size:48px;font-weight:300;letter-spacing:-.04em;line-height:1;font-variant-numeric:tabular-nums}
.num .l{font-size:15px;color:var(--mut);margin-top:10px;line-height:1.4}

/* learned */
.learn{margin-top:36px;display:grid;gap:12px}
.learn li{list-style:none}
.learn{padding:0}
.learn li{font-size:20px;line-height:1.45;font-weight:300;letter-spacing:-.01em;padding:20px 0;border-top:1px solid var(--line)}

/* note */
.note{margin-top:32px;padding:18px 22px;border-radius:18px;border:1px dashed #CFCFC8;font-size:15px;color:var(--mut);max-width:760px}
.note b{color:var(--ink);font-weight:500}

/* next */
.next{display:block;text-decoration:none;margin:0 0 0;padding:48px;border-radius:32px;background:var(--card);border:1px solid #EAEAE5;transition:transform .4s var(--ease),box-shadow .4s}
.next:hover{transform:translateY(-4px);box-shadow:0 24px 50px -30px rgba(28,28,28,.3)}
.next .l{font-size:15px;color:var(--mut)}
.next .t{font-size:clamp(40px,6vw,72px);font-weight:300;letter-spacing:-.045em;line-height:1;margin-top:10px}
.next .s{font-size:18px;color:var(--ink2);margin-top:12px}

/* footer */
.foot{margin-top:120px;border-top:1px solid var(--line)}
.foot .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;padding-block:32px 48px;font-size:14px;color:var(--mut)}

/* lightbox */
.zoom{cursor:zoom-in}
.lb{position:fixed;inset:0;z-index:100;background:rgba(20,20,18,.86);display:flex;align-items:center;justify-content:center;padding:32px;opacity:0;pointer-events:none;transition:opacity .3s}
.lb.on{opacity:1;pointer-events:auto;cursor:zoom-out}
.lb img{max-width:100%;max-height:100%;border-radius:12px;transform:scale(.96);transition:transform .4s var(--ease)}
.lb.on img{transform:none}

/* reveals */
.rv{transition:opacity .8s var(--ease),transform .9s var(--ease),clip-path 1.1s var(--ease)}
.rv.armed{opacity:0;transform:translateY(26px)}
.rv.clip.armed{opacity:1;transform:none;clip-path:inset(40% 0 40% 0 round 24px)}
.rv.clip{clip-path:inset(0 0 0 0 round 24px)}
.hero .in{animation:rise .9s var(--ease) both}
.hero .in:nth-child(2){animation-delay:.08s}.hero .in:nth-child(3){animation-delay:.16s}.hero .in:nth-child(4){animation-delay:.24s}.hero .in:nth-child(5){animation-delay:.32s}
@keyframes rise{from{opacity:0;transform:translateY(22px)}}

/* hub */
.hub-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:56px}
.hc{display:flex;flex-direction:column;text-decoration:none;background:var(--card);border:1px solid #EAEAE5;border-radius:32px;padding:12px;transition:transform .4s var(--ease),box-shadow .4s}
.hc:hover{transform:translateY(-4px);box-shadow:0 24px 50px -30px rgba(28,28,28,.3)}
.hc .im{aspect-ratio:16/10;border-radius:22px;overflow:hidden;background:var(--tint);display:flex;align-items:flex-end;justify-content:center}
.hc .im img{width:100%;height:100%;object-fit:cover;object-position:top center;transition:transform .8s var(--ease)}
.hc:hover .im img{transform:scale(1.03)}
.hc .b{padding:22px 16px 16px;display:flex;justify-content:space-between;gap:16px;align-items:flex-end}
.hc h3{font-size:26px;font-weight:500;letter-spacing:-.02em;margin:0}
.hc p{margin:4px 0 0;font-size:16px;color:var(--mut)}
.hc .k{font-size:13px;color:var(--mut);white-space:nowrap}
.hc.feature{grid-column:1/-1}
.hc.feature .im{aspect-ratio:21/9}

@media (max-width:980px){
  .layout{grid-template-columns:1fr;margin-top:64px;gap:0}
  .toc{display:none}
  .facts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .nums{grid-template-columns:repeat(2,minmax(0,1fr))}
  .prog{grid-template-columns:1fr}
  .trio{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  .wrap{padding-inline:18px}
  body{font-size:17px}
  .hero{padding-block:32px 0}
  .aud,.feats,.pair,.hub-grid,.trio{grid-template-columns:1fr}
  .use{grid-template-columns:1fr;gap:6px}
  .dec .dd{grid-template-columns:1fr}
  .cover{border-radius:22px;margin-top:40px}
  .cover.pad{padding:20px 20px 0}
  .fig .frame.pad{padding:14px}
  .body>section{padding-bottom:80px}
  .timeline li{grid-template-columns:1fr;gap:2px}
  .next{padding:28px}
  .crumb .lab{display:none}
  .hc.feature .im{aspect-ratio:16/10}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* build diary */
.diary{list-style:none;margin:40px 0 0;padding:0;position:relative}
.diary::before{content:"";position:absolute;left:83px;top:10px;bottom:10px;width:2px;background:var(--line)}
.diary li{position:relative;display:grid;grid-template-columns:72px minmax(0,1fr);gap:40px;padding:0 0 36px}
.diary li::before{content:"";position:absolute;left:78px;top:8px;width:12px;height:12px;border-radius:99px;background:var(--bg);border:2px solid var(--ink)}
.diary li.has-img{grid-template-columns:72px minmax(0,1fr) minmax(0,300px)}
.diary .dt{font-size:14px;color:var(--mut);font-variant-numeric:tabular-nums;padding-top:2px;text-align:right;padding-right:4px}
.diary h3{font-size:21px;font-weight:500;letter-spacing:-.015em;margin:0;line-height:1.3}
.diary p{margin:6px 0 0;font-size:16px;color:var(--ink2);line-height:1.55}
.diary .di img{border-radius:16px;width:100%;aspect-ratio:4/3;object-fit:cover}
.spec{display:grid;grid-template-columns:1fr;gap:0;margin:40px 0 0;background:var(--card);border:1px solid #EAEAE5;border-radius:24px;padding:12px 28px}
.spec div{display:grid;grid-template-columns:160px minmax(0,1fr);gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.spec div:last-child{border-bottom:0}
.spec dt{font-size:14px;color:var(--mut)}
.spec dd{margin:0;font-size:16px;line-height:1.45}
@media (max-width:980px){.diary li.has-img{grid-template-columns:72px minmax(0,1fr)}.diary .di{grid-column:2}}
@media (max-width:680px){
  .diary::before{left:5px}.diary li,.diary li.has-img{grid-template-columns:1fr;gap:6px;padding-left:28px}
  .diary li::before{left:0}.diary .dt{text-align:left}.diary .di{grid-column:auto;margin-top:10px}
  .spec{grid-template-columns:1fr;padding:6px 20px}
  .spec div{grid-template-columns:1fr;gap:2px}
}
.trio .fig .frame.pad{padding:14px}
.trio .fig .frame.pad img{width:100%;height:auto;max-height:none!important;border-radius:10px}
.pair .fig .frame.pad{padding:20px}

/* product studies: placeholders, impact metrics, role split */
.ph{color:#B4552F}
.fig .frame.phshot{display:flex;align-items:center;justify-content:center;padding:24px;background:var(--fill);border:1px dashed #D3D3CC;text-align:center;font-size:15px;color:var(--mut)}
.cover.phshot{aspect-ratio:16/8;display:flex;align-items:center;justify-content:center;border:1px dashed #D3D3CC;background:var(--fill);color:var(--mut);font-size:16px;text-align:center;padding:24px}
.num .d{font-size:13px;color:var(--dim);margin-top:8px;line-height:1.4;padding-top:8px;border-top:1px solid var(--line)}
.ticks{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-direction:column;gap:10px}
.ticks li{font-size:16px;line-height:1.5;color:var(--ink2);padding-left:16px;position:relative}
.ticks li::before{content:"";position:absolute;left:0;top:.66em;width:6px;height:6px;border-radius:99px;background:#CFCFC8}
.stories{list-style:none;margin:36px 0 0;padding:0}
.stories a{display:grid;grid-template-columns:160px minmax(0,1fr) auto;gap:24px;align-items:baseline;padding:20px 0;border-top:1px solid var(--line);text-decoration:none}
.stories li:last-child a{border-bottom:1px solid var(--line)}
.stories .c{font-size:14px;color:var(--mut)}
.stories .t{font-size:20px;font-weight:300;letter-spacing:-.01em;line-height:1.35}
.stories .g{color:var(--dim);transition:transform .3s var(--ease)}
.stories a:hover .g{transform:translateX(4px);color:var(--ink)}
@media (max-width:680px){.stories a{grid-template-columns:minmax(0,1fr) auto;gap:4px 16px}.stories .c{grid-column:1/-1}}