/* reset */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0}
img{max-width:100%;display:block}
[hidden]{display:none!important}

/* Layout: one 12-col measure; type does the work. Featured case = layered "system stack" diagram; grid = typographic tiles that swap to real covers when images load. */
:root{
  --sun:none; --moon:block;
  --paper:#F2F5F4; --surface:#FFFFFF; --ink:#132120; --muted:#566764; --line:#D6DFDC;
  --accent:#1D6A5E; --accent-ink:#FFFFFF; --accent-soft:#DFEEEA;
  --todo:#8A5300; --todo-bg:#FDF0D8;
  --tile-1:#DCE9E5; --tile-2:#E6E9F0; --tile-3:#ECE7E0; --tile-4:#E3ECE1;
  --f-display:"Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --f-body:"Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --f-mono:"IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --s-0:clamp(.95rem,.9rem + .2vw,1.06rem);
  --s-1:clamp(1.1rem,1rem + .45vw,1.3rem);
  --s-2:clamp(1.35rem,1.1rem + .9vw,1.8rem);
  --s-3:clamp(1.7rem,1.25rem + 1.8vw,2.7rem);
  --s-4:clamp(2.2rem,1.4rem + 3.4vw,4.4rem);
  --max:1200px; --measure:66ch; --r:6px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --sun:block; --moon:none;
  --paper:#0E1514; --surface:#151F1D; --ink:#E6EEEC; --muted:#98AAA6; --line:#25322F;
  --accent:#72D2BE; --accent-ink:#0E1514; --accent-soft:#17302B;
  --todo:#F2C27A; --todo-bg:#36280F;
  --tile-1:#16302B; --tile-2:#1A2130; --tile-3:#2A241C; --tile-4:#1B2A1C; color-scheme:dark}}
:root[data-theme="dark"]{
  --sun:block; --moon:none;
  --paper:#0E1514; --surface:#151F1D; --ink:#E6EEEC; --muted:#98AAA6; --line:#25322F;
  --accent:#72D2BE; --accent-ink:#0E1514; --accent-soft:#17302B;
  --todo:#F2C27A; --todo-bg:#36280F;
  --tile-1:#16302B; --tile-2:#1A2130; --tile-3:#2A241C; --tile-4:#1B2A1C; color-scheme:dark}

html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:var(--s-0);line-height:1.6;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--paper)}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
.wrap{max-width:var(--max);margin-inline:auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
@media (min-width:720px){.wrap{padding-left:max(32px,env(safe-area-inset-left,0px));padding-right:max(32px,env(safe-area-inset-right,0px))}}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:650;line-height:1.08;letter-spacing:-.02em;text-wrap:balance;margin:0}
p{margin:0}
.label{font-family:var(--f-mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.todo{font-family:var(--f-mono);font-size:.82em;background:var(--todo-bg);color:var(--todo);padding:.05em .4em;border-radius:3px;white-space:nowrap}

/* header */
.site-head{position:sticky;top:env(safe-area-inset-top,0px);z-index:9;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:14px}
.brand{font-family:var(--f-display);font-weight:650;font-size:1.05rem;text-decoration:none;letter-spacing:-.01em}
.nav{display:flex;gap:clamp(12px,3vw,28px);font-size:.92rem}
.nav a{text-decoration:none;color:var(--muted)}
.nav a:hover{color:var(--ink)}

/* home hero */
.intro{padding-block:clamp(56px,9vw,120px) clamp(40px,6vw,72px)}
.intro .label{margin-bottom:22px;display:block}
.intro h1{font-size:var(--s-4);font-weight:650}
.intro h1 em{font-style:normal;color:var(--accent)}
.intro p{margin-top:26px;max-width:56ch;color:var(--muted);font-size:var(--s-1);line-height:1.5}
.clients{margin-top:34px;display:flex;flex-wrap:wrap;gap:8px 22px;font-family:var(--f-mono);font-size:.8rem;color:var(--muted)}

/* featured */
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;border-top:1px solid var(--ink);padding-top:14px;margin-bottom:28px}
.featured{display:grid;gap:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;text-decoration:none;color:inherit;transition:border-color .2s}
.featured:hover{border-color:var(--accent)}
@media (min-width:900px){.featured{grid-template-columns:1fr 1.1fr}}
.featured-text{padding:clamp(24px,4vw,48px);display:flex;flex-direction:column;gap:20px;min-width:0}
.featured-text h2{font-size:var(--s-3)}
.featured-text .lede{color:var(--muted);max-width:52ch}
.pillars{list-style:none;margin:0;padding:0;display:grid;gap:0;border-top:1px solid var(--line)}
.pillars li{display:grid;grid-template-columns:2.2rem 1fr;gap:4px 10px;padding-block:14px;border-bottom:1px solid var(--line)}
.pillars .n{font-family:var(--f-mono);font-size:.78rem;color:var(--accent);padding-top:3px}
.pillars strong{font-weight:600;display:block}
.pillars span.d{grid-column:2;color:var(--muted);font-size:.92rem}
.cta{display:inline-flex;align-items:center;gap:10px;font-weight:600;color:var(--accent)}
.cta::after{content:"→";transition:transform .2s}
a:hover .cta::after,.cta:hover::after{transform:translateX(4px)}

.feature-media{position:relative;overflow:hidden;background:var(--tile-2);display:flex;flex-direction:column;justify-content:flex-end;padding:clamp(16px,2.5vw,32px);min-width:0;min-height:clamp(380px,60vw,560px)}
.feature-media .bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:50% 20%}
.feature-media .ui{position:relative;width:100%;height:auto;filter:drop-shadow(0 18px 30px rgb(0 0 0 / .22));transition:transform .5s ease}
.featured:hover .feature-media .ui{transform:translateY(-6px)}
/* system stack diagram */
.stack{background:var(--accent-soft);padding:clamp(24px,4vw,44px);display:flex;flex-direction:column;justify-content:center;gap:10px;min-width:0}
.stack .label{margin-bottom:6px}
.layer{background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:12px 14px;display:grid;gap:8px}
.layer-top{display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.layer-top b{font-family:var(--f-display);font-weight:650;font-size:1rem;letter-spacing:-.01em}
.layer-top i{font-style:normal;font-family:var(--f-mono);font-size:.7rem;color:var(--muted);white-space:nowrap}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-family:var(--f-mono);font-size:.72rem;padding:3px 7px;border-radius:3px;border:1px solid var(--line);color:var(--muted);background:var(--paper)}
.chip.on{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.joint{height:14px;width:1px;background:var(--accent);margin-left:22px;opacity:.6}
.layer.base{border-style:dashed}

/* grid */
.work{padding-block:clamp(56px,8vw,96px) 0}
.grid{display:grid;gap:clamp(20px,3vw,32px)}
@media (min-width:640px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:980px){.grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:12px;min-width:0}
.cover{position:relative;aspect-ratio:1200/630;max-width:100%;border-radius:var(--r);overflow:hidden;background:var(--tile-1);border:1px solid var(--line)}
.cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .cover img{transform:scale(1.025)}
.tile{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:space-between;padding:clamp(18px,3vw,30px)}
.tile .big{font-family:var(--f-display);font-weight:750;font-size:clamp(1.6rem,1.2rem + 1.6vw,2.6rem);letter-spacing:-.035em;line-height:.95;max-width:12ch}
.tile .metric{font-family:var(--f-mono);font-size:.8rem;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.card-meta{display:flex;justify-content:space-between;gap:12px;align-items:baseline}
.card h3{font-size:var(--s-1)}
.card p{color:var(--muted);max-width:56ch;font-size:.95rem}
.card:hover h3{color:var(--accent)}
.tags{display:flex;gap:6px;flex-wrap:wrap}

/* earlier */
.earlier{padding-block:clamp(64px,9vw,112px) 0}
.list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.list li{display:grid;grid-template-columns:1fr;gap:2px 24px;padding-block:16px;border-bottom:1px solid var(--line)}
@media (min-width:760px){.list li{grid-template-columns:minmax(180px,1fr) 2fr auto;align-items:baseline}}
.list b{font-family:var(--f-display);font-weight:650;font-size:1.1rem}
.list span{color:var(--muted)}
.list a{font-family:var(--f-mono);font-size:.78rem;color:var(--accent)}

/* about */
.about{padding-block:clamp(64px,9vw,112px)}
.about-grid{display:grid;gap:32px}
@media (min-width:860px){.about-grid{grid-template-columns:1.3fr 1fr}}
.about h2{font-size:var(--s-3);margin-bottom:20px}
.about p+p{margin-top:14px}
.about .side{display:grid;gap:24px;align-content:start;min-width:0}
.panel{border:1px solid var(--line);border-radius:var(--r);padding:20px;background:var(--surface)}
.panel h3{font-size:1.1rem;margin-bottom:8px}
.panel p{color:var(--muted);font-size:.95rem}
.contact-row{display:flex;justify-content:space-between;gap:12px;padding-block:8px;border-bottom:1px solid var(--line);font-size:.95rem}
.contact-row:last-child{border-bottom:0}
.contact-row{align-items:center;flex-wrap:wrap}
.email-slot{display:inline-flex;gap:10px;align-items:center;flex-wrap:wrap}
.reveal,.copy{font:inherit;font-size:.85rem;padding:4px 10px;border-radius:4px;border:1px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer}
.prose a.ext,.panel p a.ext{font-family:inherit;font-size:inherit;white-space:nowrap}
.reveal:hover,.copy:hover{border-color:var(--accent);color:var(--accent)}
.cs-hero{margin:0 0 clamp(8px,2vw,16px);display:grid;gap:10px}
.cs-hero .stage{display:grid;place-items:center;padding:clamp(20px,5vw,64px);border-radius:var(--r);background:var(--accent-soft);border:1px solid var(--line)}
.cs-hero img{width:100%;max-width:1000px;height:auto}
.cs-hero figcaption{font-size:.85rem;color:var(--muted)}
footer{border-top:1px solid var(--line);padding-block:28px;color:var(--muted);font-size:.85rem}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* case study */
.cs-head{padding-block:clamp(36px,6vw,72px) clamp(28px,4vw,48px)}
.back{font-family:var(--f-mono);font-size:.8rem;text-decoration:none;color:var(--muted);display:inline-block;margin-bottom:clamp(28px,5vw,56px)}
.back:hover{color:var(--accent)}
.cs-head h1{font-size:var(--s-4);max-width:18ch;margin-top:14px}
.cs-head .summary{margin-top:24px;font-size:var(--s-1);line-height:1.5;max-width:58ch;color:var(--muted)}
.draft{margin-top:24px;display:flex;gap:10px;align-items:baseline;padding:12px 14px;border-radius:4px;background:var(--todo-bg);color:var(--todo);font-size:.9rem;max-width:68ch}
.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}
.metric-cell{padding:22px 20px 22px 0;display:grid;gap:6px;align-content:start}
.metric-cell+.metric-cell{padding-left:20px;border-left:1px solid var(--line)}
@media (max-width:540px){.metric-cell+.metric-cell{padding-left:0;border-left:0;border-top:1px solid var(--line)}}
.metric-cell .v{font-family:var(--f-display);font-weight:750;font-size:clamp(2rem,1.4rem + 2.4vw,3.2rem);letter-spacing:-.03em;line-height:1;font-variant-numeric:tabular-nums;color:var(--accent)}
.metric-cell .k{color:var(--muted);font-size:.9rem;max-width:26ch}
.spec{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px 28px;padding-block:28px;border-bottom:1px solid var(--line)}
.spec div{display:grid;gap:4px;min-width:0}
.spec dd{margin:0;font-size:.95rem}
.spec dt{margin:0}
.cs-body{padding-block:clamp(40px,6vw,80px)}
.cs-section{display:grid;gap:18px;padding-block:clamp(32px,5vw,56px);border-top:1px solid var(--line)}
@media (min-width:900px){.cs-section{grid-template-columns:220px minmax(0,1fr);gap:40px}}
.cs-section > .label{padding-top:6px}
.cs-section h2{font-size:var(--s-2);margin-bottom:16px;max-width:30ch}
.prose{max-width:var(--measure)}
.prose p+p,.prose p+ul,.prose ul+p{margin-top:14px}
.prose ul{margin:0;padding-left:1.1em}
.prose li+li{margin-top:6px}
.prose li::marker{color:var(--accent)}
.cols3{display:grid;gap:24px}
@media (min-width:760px){.cols3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.cols3 h3{font-size:1.05rem;margin-bottom:10px}
.cols3 ul{padding-left:1.1em;margin:0;color:var(--muted);font-size:.95rem}
.cols3 li+li{margin-top:6px}
.step{display:grid;gap:20px}
.step+.step{margin-top:clamp(36px,5vw,56px)}
.step h3{font-size:var(--s-1);display:flex;gap:12px;align-items:baseline}
.step h3 .n{font-family:var(--f-mono);font-size:.78rem;color:var(--accent);font-weight:500}
.fig{margin:0;display:grid;gap:8px;min-width:0;align-content:start}
.frame{position:relative;max-width:100%;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);background:var(--surface)}
.frame img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ph{position:absolute;inset:0;display:grid;place-content:center;gap:6px;text-align:center;padding:16px;color:var(--muted);
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:24px 24px;background-position:-1px -1px}
.ph span{font-family:var(--f-display);font-weight:650;color:var(--ink);font-size:1rem;background:var(--surface);padding:2px 8px;border-radius:3px}
.ph code{font-family:var(--f-mono);font-size:.7rem;background:var(--surface);padding:1px 6px;border-radius:3px;overflow-wrap:anywhere}
.fig figcaption{font-size:.85rem;color:var(--muted)}
.pair{display:grid;gap:16px;align-items:start}
@media (min-width:700px){.pair{grid-template-columns:1fr 1fr}}
.pair .tag{font-family:var(--f-mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.08em}
.lessons{list-style:none;margin:0;padding:0;display:grid;gap:0;max-width:var(--measure)}
.lessons li{padding-block:16px;border-bottom:1px solid var(--line)}
.lessons li:first-child{padding-top:0}
.lessons b{display:block;font-family:var(--f-display);font-weight:650;font-size:1.1rem;margin-bottom:4px}
.lessons span{color:var(--muted)}
.next{display:grid;gap:10px;padding:clamp(28px,5vw,56px);border-radius:var(--r);background:var(--accent-soft);text-decoration:none;margin-top:clamp(32px,5vw,56px)}
.next h2{font-size:var(--s-3)}
.next:hover h2{color:var(--accent)}
.ext{font-family:var(--f-mono);font-size:.82rem;color:var(--accent)}
.bars{display:grid;gap:14px;padding:clamp(16px,3vw,24px);border:1px solid var(--line);border-radius:var(--r);background:var(--surface);max-width:46rem}
.bar{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 12px;align-items:baseline;font-size:.92rem}
.bar .pct{font-family:var(--f-mono);font-variant-numeric:tabular-nums;color:var(--accent)}
.bar .track{grid-column:1/-1;height:8px;background:var(--accent-soft);border-radius:4px;overflow:hidden}
.bar .fill{height:100%;background:var(--accent);border-radius:4px}
.seq{display:grid;gap:16px;align-items:start}
@media (min-width:900px){.seq{grid-template-columns:repeat(3,minmax(0,1fr))}}
.view{animation:fade .35s ease both}
@keyframes fade{from{opacity:.4;transform:translateY(6px)}to{opacity:1;transform:none}}

/* theme switch */
.head-right{display:flex;align-items:center;gap:clamp(12px,3vw,28px)}
.theme-toggle{display:grid;place-items:center;width:36px;height:36px;border:1px solid var(--line);border-radius:50%;background:var(--surface);color:var(--ink);cursor:pointer;padding:0}
.theme-toggle:hover{border-color:var(--accent);color:var(--accent)}
.theme-toggle svg{width:16px;height:16px}
.theme-toggle .i-sun{display:var(--sun)}
.theme-toggle .i-moon{display:var(--moon)}
.skip{position:absolute;left:-999px;top:8px;background:var(--surface);color:var(--ink);padding:8px 12px;border-radius:4px;z-index:20}
.skip:focus{left:max(16px,env(safe-area-inset-left,0px))}
.frame:has(img) .ph{visibility:hidden}
.brand{white-space:nowrap}
@media (max-width:440px){.nav a[href="/#contact"]{display:none}.nav{gap:14px}}