/* IntroSides. Tokens first, then mobile-first components. */
:root{
  --paper:#F5F2EB;--paper-2:#ECE7DC;--card:#FBF9F4;
  --ink:#15171C;--ink-2:#3A3D45;--sub:#6A6860;--rule:#D9D3C6;--rule-soft:#ECE7DC;
  --signal:#C2441C;--signal-hover:#A83916;--specialist:#1F4E5A;
  --ember:#E8714A;--mist:#8FB8C2;--on-dark:#D8D4CB;
  --serif:"Newsreader",Charter,"Iowan Old Style",Georgia,serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --gutter:clamp(20px,5vw,120px);
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:92px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:18px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
h1,h2,h3,p,blockquote{margin:0}
h1,h2,h3{font-weight:500;letter-spacing:-.02em;text-wrap:balance}
p{text-wrap:pretty}
a{color:inherit}
svg{display:block}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.wrap{max-width:1440px;margin-inline:auto;padding-inline:var(--gutter)}
.label{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;line-height:1.4}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:2px}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--ink);color:var(--paper);padding:12px 16px;font-family:var(--mono);font-size:13px;text-decoration:none;border-radius:2px;transition:top .2s var(--ease)}
.skip:focus{top:12px}

/* ---------- Buttons and links ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:14px 24px;font-family:var(--mono);font-size:14px;letter-spacing:.01em;text-decoration:none;border-radius:2px;transition:transform .2s var(--ease),background-color .2s var(--ease),box-shadow .25s var(--ease)}
.arr{display:inline-block;transition:transform .25s var(--ease)}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn:hover .arr,.essay:hover .arr,.next:hover .arr{transform:translateX(4px)}
.btn-signal{background:var(--signal);color:#fff}
.btn-signal:hover{background:var(--signal-hover);box-shadow:0 10px 24px -12px rgba(194,68,28,.7)}
.btn-ink{background:var(--ink);color:var(--paper)}
.btn-ink:hover{background:#2A2D35}
.btn-ember{background:var(--ember);color:var(--ink)}
.btn-ember:hover{background:#F0845F;box-shadow:0 10px 24px -12px rgba(232,113,74,.7)}
.text-link{display:inline-flex;align-items:center;min-height:44px;font-family:var(--mono);font-size:14px;text-underline-offset:5px;text-decoration-thickness:1px;transition:color .2s var(--ease)}
.text-link:hover{color:var(--signal)}

/* ---------- Mark ---------- */
.mark{flex:none}
.mark .l{fill:var(--signal)}
.mark .r{fill:var(--specialist)}
.mark path{transition:transform .45s var(--ease)}
.brand:hover .mark .l{transform:translateX(2px)}
.brand:hover .mark .r{transform:translateX(-2px)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(245,242,235,.92);-webkit-backdrop-filter:saturate(1.2) blur(10px);backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid transparent;transition:border-color .3s var(--ease),box-shadow .3s var(--ease)}
.site-header.is-scrolled{border-bottom-color:var(--rule);box-shadow:0 8px 24px -20px rgba(21,23,28,.4)}
.bar{position:relative;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;min-height:68px;gap:8px 24px}
.brand{display:inline-flex;align-items:center;gap:10px;min-height:44px;text-decoration:none;font-size:22px;font-weight:600;letter-spacing:-.025em}
.brand .mark{width:24px;height:24px}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;margin-right:-10px;padding:0;background:none;border:0;cursor:pointer;color:var(--ink)}
.bars{position:relative;width:20px;height:2px;background:currentColor;transition:background-color .2s}
.bars::before,.bars::after{content:"";position:absolute;left:0;width:20px;height:2px;background:currentColor;transition:transform .3s var(--ease)}
.bars::before{transform:translateY(-6px)}
.bars::after{transform:translateY(6px)}
.nav-toggle[aria-expanded="true"] .bars{background:transparent}
.nav-toggle[aria-expanded="true"] .bars::before{transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bars::after{transform:rotate(-45deg)}
.nav-links{display:flex;flex-wrap:wrap;align-items:center;gap:0 20px;padding-bottom:10px}
.nav-links a:not(.btn){display:inline-flex;align-items:center;min-height:44px;font-family:var(--mono);font-size:14px;color:var(--ink-2);text-decoration:none;transition:color .2s var(--ease)}
.nav-links a:not(.btn):hover{color:var(--signal)}
.back{display:inline-flex;align-items:center;min-height:44px;font-family:var(--mono);font-size:13px;color:var(--ink-2);text-decoration:none;transition:color .2s var(--ease)}
.back:hover{color:var(--signal)}

/* Mobile menu, only when the script is running */
@media (max-width:819px){
  .js .nav-toggle{display:inline-flex}
  .js .nav-links{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;padding:8px var(--gutter) 24px;background:var(--paper);border-bottom:1px solid var(--rule);box-shadow:0 18px 30px -24px rgba(21,23,28,.45);opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .25s var(--ease),transform .25s var(--ease),visibility 0s linear .25s}
  .js .site-header[data-open] .nav-links{opacity:1;visibility:visible;transform:none;transition-delay:0s}
  .js .nav-links a:not(.btn){font-size:15px;padding:10px 0;border-bottom:1px solid var(--rule-soft)}
  .js .nav-links .btn{margin-top:16px}
}
@media (min-width:820px){
  .bar{min-height:84px;flex-wrap:nowrap}
  .brand{font-size:25px}
  .brand .mark{width:28px;height:28px}
  .nav-links{gap:32px;padding:0}
  .nav-links a:not(.btn){position:relative;font-size:13px}
  .nav-links a:not(.btn)::after{content:"";position:absolute;left:0;right:0;bottom:10px;height:1px;background:var(--signal);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
  .nav-links a:not(.btn):hover::after{transform:scaleX(1)}
  .nav-links .btn{min-height:44px;padding:12px 20px;font-size:13px}
}

/* ---------- Hero ---------- */
.hero{display:grid;gap:clamp(40px,5vw,80px);align-items:center;padding-block:clamp(48px,8vw,112px) clamp(56px,7vw,104px)}
.hero-copy{display:flex;flex-direction:column;align-items:flex-start;gap:clamp(20px,2.4vw,32px)}
.eyebrow{color:var(--signal)}
.hero h1{font-size:clamp(2.5rem,1.4rem + 4.2vw,4.85rem);line-height:1.03;letter-spacing:-.028em}
.hero h1 em{color:var(--signal);font-weight:400}
.lede{max-width:34em;font-size:clamp(18px,1rem + .45vw,23px);line-height:1.5;color:var(--ink-2)}
.actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px 28px}
.meta{font-family:var(--mono);font-size:12.5px;color:var(--sub)}
@media (max-width:519px){.actions .btn{width:100%}}
@media (min-width:1024px){.hero{grid-template-columns:minmax(0,1.12fr) minmax(0,1fr)}}

/* Two-sides diagram */
.pairs{background:var(--card);border:1px solid var(--rule);border-radius:4px;padding:6px clamp(18px,2.4vw,32px)}
.pairs-head{display:none}
.pair{display:grid;gap:8px;padding:20px 0;border-bottom:1px solid var(--rule-soft)}
.pair:last-child{border-bottom:0}
.side{display:flex;flex-direction:column;gap:4px}
.side .tag{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase}
.co .tag,.co-head{color:var(--signal)}
.sp .tag,.sp-head{color:var(--specialist)}
.what{font-size:clamp(18px,1rem + .3vw,21px);line-height:1.28}
.when{font-family:var(--mono);font-size:12px;color:var(--sub)}
.link-mark{width:36px;height:16px}
.link-mark .l{fill:var(--signal)}
.link-mark .r{fill:var(--specialist)}
.link-mark path{transition:transform .8s var(--ease) calc(var(--i,0)*120ms + 250ms)}
.js .pair .link-mark .l{transform:translateX(-7px)}
.js .pair .link-mark .r{transform:translateX(7px)}
.js .pair.is-in .link-mark path{transform:none}
@media (min-width:560px){
  .pairs{padding-top:26px}
  .pairs-head{display:grid;grid-template-columns:minmax(0,1fr) 56px minmax(0,1fr);padding-bottom:16px;border-bottom:1px solid var(--rule)}
  .pair{grid-template-columns:minmax(0,1fr) 56px minmax(0,1fr);align-items:center;gap:0;padding:22px 0}
  .side .tag{display:none}
  .link-mark{justify-self:center}
}

/* ---------- Sections ---------- */
.section{padding-block:clamp(64px,8vw,104px);border-top:1px solid var(--rule)}
.section.alt{background:var(--paper-2);border-top:0}
.sec-head{display:grid;gap:16px 80px;align-items:end;margin-bottom:clamp(32px,4vw,56px)}
.kicker{display:flex;flex-direction:column;gap:16px}
.section h2{font-size:clamp(2rem,1.3rem + 2.4vw,3.3rem);line-height:1.08}
.sec-head p{max-width:32em;font-size:clamp(17px,1rem + .2vw,20px);line-height:1.55;color:var(--ink-2)}
.k-signal{color:var(--signal)}
.k-spec{color:var(--specialist)}
@media (min-width:900px){.sec-head{grid-template-columns:1fr 1fr}}

/* Live signal */
.feed{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.feed li{display:grid;gap:8px;padding:22px 0;border-bottom:1px solid var(--rule)}
.feed .lane{font-size:10.5px;color:var(--specialist)}
.feed .txt{font-size:clamp(19px,1rem + .55vw,25px);line-height:1.35}
.feed .src{font-family:var(--mono);font-size:12px;color:var(--sub)}
.sourced{margin-top:20px;font-family:var(--mono);font-size:12px;color:var(--sub)}
@media (min-width:900px){
  .feed li{grid-template-columns:200px minmax(0,1fr) 220px;gap:40px;align-items:baseline;padding:28px 0}
  .feed .src{text-align:right}
}

/* How I work */
.cards{display:grid;gap:20px}
.card{display:flex;flex-direction:column;gap:18px;padding:clamp(28px,4vw,48px);border-radius:4px;transition:translate .3s var(--ease),scale .15s var(--ease),box-shadow .3s var(--ease)}
.card:hover{box-shadow:0 20px 40px -30px rgba(21,23,28,.5)}
.card .half{width:20px;height:40px}
.card h3{font-size:clamp(24px,1.1rem + .9vw,32px);line-height:1.2}
.card p{font-size:clamp(17px,1rem + .2vw,20px);line-height:1.6}
.card.co{background:var(--paper)}
.card.co .label{color:var(--signal)}
.card.co p{color:var(--ink-2)}
.card.sp{background:var(--specialist);color:var(--paper)}
.card.sp .label{color:var(--mist)}
.card.sp p{color:#E4E9E7}
.open{display:grid;gap:10px 40px;align-items:baseline;margin-top:clamp(32px,4vw,48px);padding-top:28px;border-top:1px solid var(--rule)}
.open .label{color:var(--ink-2)}
.open p{max-width:46em;font-size:clamp(17px,1rem + .2vw,20px);color:var(--ink-2)}
@media (min-width:900px){
  .cards{grid-template-columns:1fr 1fr;gap:24px}
  .open{grid-template-columns:200px 1fr}
}

.open .text-link.inline{display:inline;min-height:0;margin-left:4px;color:var(--signal)}

/* Results */
.results{display:grid;gap:20px}
.result{position:relative;overflow:hidden;display:flex;flex-direction:column;gap:14px;padding:clamp(24px,3vw,36px);background:var(--card);border:1px solid var(--rule);border-radius:4px;color:var(--ink);text-decoration:none;transition:translate .3s var(--ease),scale .15s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
/* Two-sided top bar: the halves slide in and meet, like the mark */
.result::before,.result::after{content:"";position:absolute;top:0;height:3px;width:50%;transition:transform .8s var(--ease) calc(var(--i,0)*50ms + 200ms)}
.result::before{left:0;background:var(--signal)}
.result::after{right:0;background:var(--specialist)}
.js .result::before{transform:translateX(-101%)}
.js .result::after{transform:translateX(101%)}
.js .result.is-in::before,.js .result.is-in::after{transform:none}
.result:active{scale:.99}
@media (hover:hover){.result:hover{translate:0 -3px;border-color:#CFC7B7;box-shadow:0 20px 40px -30px rgba(21,23,28,.5)}}
.result .ind{color:var(--specialist)}
.result .m{font-size:clamp(26px,1.2rem + 1.2vw,38px);line-height:1.1;font-weight:500;letter-spacing:-.02em}
.result .who{font-family:var(--mono);font-size:13px;color:var(--sub)}
.result .row{display:flex;flex-direction:column;gap:4px;padding-top:14px;border-top:1px solid var(--rule-soft);font-size:17px;line-height:1.5;color:var(--ink-2)}
.result .row .label{color:var(--sub)}
.result .more{margin-top:auto;padding-top:8px;font-family:var(--mono);font-size:13px;color:var(--signal)}
.result:hover .arr,.proof a:hover .arr{transform:translateX(4px)}
.more-proof{display:grid;gap:24px;margin-top:clamp(48px,6vw,80px)}
.more-proof h3{font-size:clamp(24px,1.1rem + .9vw,32px);line-height:1.2}
.proof li{display:block;padding:0}
.proof a{position:relative;display:grid;gap:8px;padding:22px 0;color:var(--ink);text-decoration:none}
.proof a::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:var(--signal);transform:scaleX(0);transform-origin:left;transition:transform .2s ease-in}
.proof a:hover::after,.proof a:focus-visible::after{transform:scaleX(1);transition:transform .35s var(--ease)}
.proof .txt{display:flex;flex-direction:column;gap:4px;transition:color .2s var(--ease)}
.proof .who{font-family:var(--mono);font-size:12.5px;color:var(--sub)}
.proof .go{font-family:var(--mono);font-size:13px;color:var(--signal)}
.proof a:hover .txt{color:var(--signal)}
@media (min-width:900px){
  .results{grid-template-columns:1fr 1fr;gap:24px}
  .proof a{grid-template-columns:200px minmax(0,1fr) 220px;gap:40px;align-items:baseline;padding:28px 0}
  .proof .go{text-align:right}
}

/* Writing */
.essays{display:grid;gap:36px}
.essay{display:flex;flex-direction:column;gap:14px;padding-top:24px;border-top:2px solid var(--ink);color:var(--ink);text-decoration:none}
.essay .date{font-family:var(--mono);font-size:12px;color:var(--sub)}
.essay .t{font-size:clamp(25px,1.2rem + 1vw,34px);line-height:1.15;font-weight:500;letter-spacing:-.01em}
.essay .t span{background:linear-gradient(var(--signal),var(--signal)) 0 100%/0 1px no-repeat;transition:background-size .5s var(--ease)}
.essay:hover .t span{background-size:100% 1px}
.essay .ex{font-size:clamp(17px,1rem + .15vw,19px);color:var(--ink-2)}
.essay .more{font-family:var(--mono);font-size:13px;color:var(--signal)}
@media (min-width:900px){.essays{grid-template-columns:1fr 1fr;gap:24px}}

/* Contact */
.cta{background:var(--ink);color:var(--paper);padding-block:clamp(64px,9vw,112px)}
.cta .wrap{display:grid;gap:28px 80px;align-items:end}
.cta .col{display:flex;flex-direction:column;align-items:flex-start;gap:22px}
.cta .label,.scarcity{color:var(--ember)}
.scarcity{font-family:var(--mono);font-size:14px}
.cta h2{font-size:clamp(2.1rem,1.3rem + 3vw,3.75rem);line-height:1.05}
.cta p{font-size:clamp(17px,1rem + .2vw,20px);color:var(--on-dark)}
.cta :focus-visible{outline-color:var(--ember)}
@media (max-width:519px){.cta .btn{width:100%}}
@media (min-width:1024px){.cta .wrap{grid-template-columns:1.4fr 1fr}}

/* Footer */
.site-footer{border-top:1px solid var(--rule)}
.site-footer .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:4px 24px;padding-block:24px 32px;font-family:var(--mono);font-size:12px;color:var(--sub)}
.foot-brand{display:flex;align-items:center;gap:10px}
.foot-brand .mark{width:16px;height:16px}
.site-footer a{display:inline-flex;align-items:center;min-height:44px;color:var(--sub);text-decoration:none;transition:color .2s var(--ease)}
.site-footer a:hover{color:var(--signal)}

/* ---------- Essay pages ---------- */
.progress{position:fixed;top:0;left:0;right:0;z-index:60;height:3px;background:linear-gradient(90deg,var(--signal) 50%,var(--specialist) 50%);transform:scaleX(0);transform-origin:0 50%}
.article{display:flex;flex-direction:column;gap:26px;max-width:680px;margin-inline:auto;padding-block:clamp(48px,8vw,96px) clamp(56px,7vw,80px)}
.article .label{color:var(--signal)}
.article h1{font-size:clamp(2.3rem,1.4rem + 3.2vw,3.65rem);line-height:1.05;letter-spacing:-.025em}
.seam{display:flex;gap:6px;width:64px;height:2px}
.seam span{flex:1}
.seam span:first-child{background:var(--signal)}
.seam span:last-child{background:var(--specialist)}
.article p{font-size:clamp(19px,1rem + .4vw,22px);line-height:1.65}
.article .lead::first-letter{float:left;padding:.08em .12em 0 0;font-size:4.1em;line-height:.8;font-weight:500;color:var(--signal)}
.article blockquote{margin-block:12px;padding-block:32px;border-block:1px solid var(--rule);font-size:clamp(26px,1.2rem + 1.6vw,36px);line-height:1.25;font-style:italic;letter-spacing:-.01em;color:var(--specialist)}
.article .bio{padding-top:24px;border-top:1px solid var(--rule);font-size:17px;font-style:italic;line-height:1.6;color:var(--sub)}
.next{display:flex;flex-direction:column;gap:10px;margin-top:20px;padding:clamp(28px,4vw,40px);border-radius:4px;background:var(--ink);color:var(--paper);text-decoration:none;transition:translate .3s var(--ease),scale .15s var(--ease),box-shadow .3s var(--ease)}
.next:hover{box-shadow:0 20px 40px -26px rgba(21,23,28,.6)}
.next .label{color:var(--ember)}
.next .t{font-size:clamp(22px,1rem + 1vw,30px);line-height:1.2;font-weight:500}

/* ---------- Case study pages ---------- */
.case .client{font-family:var(--mono);font-size:14px;color:var(--sub)}
.case .summary{font-size:clamp(20px,1rem + .6vw,25px);line-height:1.5;color:var(--ink-2)}
.brief{display:grid;gap:0;margin:0;border-block:1px solid var(--rule)}
.brief div{display:grid;gap:6px;padding:20px 0}
.brief div+div{border-top:1px solid var(--rule-soft)}
.brief dt{color:var(--specialist)}
.brief dd{margin:0;font-size:clamp(18px,1rem + .25vw,21px);line-height:1.5}
@media (min-width:640px){.brief div{grid-template-columns:200px 1fr;gap:24px;align-items:baseline}}
.case h2{margin-top:14px;font-size:clamp(24px,1.1rem + .8vw,30px);line-height:1.2}
.points{display:flex;flex-direction:column;gap:14px;margin:0;padding:0;list-style:none}
.points li{position:relative;padding-left:28px;font-size:clamp(18px,1rem + .3vw,21px);line-height:1.6}
.points li::before{content:"";position:absolute;left:0;top:.72em;width:14px;height:2px;background:var(--signal);transform-origin:left;transition:transform .5s var(--ease) calc(var(--i,0)*50ms + 150ms)}
.js .points li::before{transform:scaleX(0)}
.js .points li.is-in::before{transform:none}
/* Seam halves slide in and meet on load */
.seam span{transition:transform .8s var(--ease) .3s}
.js .seam span:first-child{transform:translateX(-10px)}
.js .seam span:last-child{transform:translateX(10px)}
.js .seam.is-in span{transform:none}
.case .text-link{align-self:flex-start}

/* ---------- Motion ---------- */
/* Reveal uses `transform` with a stagger; hover uses `translate` with none, so hovers never lag behind the stagger. */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease);transition-delay:calc(min(var(--i,0),6)*50ms)}
.js .reveal.is-in{opacity:1;transform:none}
.js .card.reveal,.js .next.reveal,.js .result.reveal{transition:opacity .6s var(--ease) calc(min(var(--i,0),6)*50ms),transform .6s var(--ease) calc(min(var(--i,0),6)*50ms),translate .3s var(--ease),scale .15s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
@media (hover:hover){.card:hover,.next:hover{translate:0 -3px}}
.card:active,.next:active{scale:.99}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;transition-delay:0s!important}
  .js .reveal,.js .pair .link-mark path{opacity:1;transform:none}
  .progress{display:none}
}