:root{--bg: #fafaf8;--bg-alt: #f1f3f5;--ink: #111319;--ink-2: #2b2f3a;--muted: #5a6070;--rule: #d9dce0;--rule-strong: #b5b9c0;--accent: #5b5bd6;--accent-soft: #e6e6fb;--accent-ink: #3a3aa6;--warn: #b54b0a;--sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--serif: "IBM Plex Serif", Georgia, "Times New Roman", serif;--mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;--measure: 62ch;--gutter: clamp(1.25rem, 4vw, 2.5rem);--section-y: clamp(4rem, 9vw, 7.5rem)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}body{margin:0;font-family:var(--sans);font-weight:400;font-size:17px;line-height:1.55;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:var(--ink);text-underline-offset:3px}a:hover{color:var(--accent-ink)}.wrap{max-width:1180px;margin:0 auto;padding:0 var(--gutter)}.eyebrow{font-family:var(--sans);font-weight:500;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-ink);display:inline-flex;align-items:center;gap:.6rem;margin:0 0 1.25rem}.eyebrow:before{content:"";width:1.8rem;height:1px;background:var(--accent-ink);display:inline-block}.masthead{border-bottom:1px solid var(--rule);background:var(--bg);position:sticky;top:0;z-index:20;-webkit-backdrop-filter:saturate(1.2) blur(8px);backdrop-filter:saturate(1.2) blur(8px);background:#fafaf8e0}.masthead-row{display:flex;align-items:center;justify-content:space-between;padding:1rem 0;gap:1rem}.mast-mark{display:inline-flex;align-items:baseline;gap:.55rem;font-family:var(--sans);font-weight:500;letter-spacing:-.01em;color:var(--ink);text-decoration:none}.mast-mark svg{display:block}.mast-mark .mast-name{font-size:.98rem}.mast-mark .mast-sub{font-family:var(--serif);font-style:italic;font-weight:400;font-size:.9rem;color:var(--muted)}.mast-nav{display:flex;gap:1.4rem;font-size:.88rem}.mast-nav a{color:var(--ink-2);text-decoration:none}.mast-nav a:hover{color:var(--accent-ink)}@media(max-width:560px){.mast-nav a{display:none}.mast-nav a.keep{display:inline}}.hero{padding:clamp(3.5rem,9vw,7rem) 0 clamp(3rem,7vw,5.5rem);border-bottom:1px solid var(--rule);position:relative;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(2rem,5vw,4rem);align-items:start}@media(max-width:900px){.hero-grid{grid-template-columns:1fr}}.hero h1{font-family:var(--sans);font-weight:500;font-size:clamp(2rem,5.2vw,3.45rem);line-height:1.08;letter-spacing:-.02em;margin:0 0 1.5rem;max-width:20ch}.hero h1 em{font-family:var(--serif);font-style:italic;font-weight:400;color:var(--accent-ink)}.hero-lede{font-size:clamp(1.05rem,1.55vw,1.18rem);color:var(--ink-2);max-width:56ch;margin:0 0 2rem}.hero-cta{display:inline-flex;align-items:center;gap:.6rem;padding:.9rem 1.25rem;background:var(--ink);color:var(--bg);font-weight:500;text-decoration:none;border-radius:2px;transition:transform .14s ease,background .14s ease}.hero-cta:hover{background:var(--accent-ink);color:var(--bg);transform:translateY(-1px)}.hero-cta .arrow{transition:transform .14s ease}.hero-cta:hover .arrow{transform:translate(3px)}.hero-meta{margin-top:1.3rem;font-size:.88rem;color:var(--muted);display:flex;gap:1rem;flex-wrap:wrap}.hero-meta span:before{content:"◦ ";color:var(--accent-ink)}.hero-diagram{position:relative;padding:1.5rem;border:1px solid var(--rule);background:var(--bg)}.hero-diagram:before{content:"Fig. 01 — Foundations";position:absolute;top:-.72rem;left:1rem;background:var(--bg);padding:0 .5rem;font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;color:var(--muted);text-transform:uppercase}.hero-diagram svg{width:100%;height:auto;display:block}section{padding:var(--section-y) 0}.section-head{display:grid;grid-template-columns:1fr 2.2fr;gap:clamp(1.5rem,4vw,3rem);margin-bottom:clamp(2rem,5vw,3.5rem);align-items:baseline}@media(max-width:780px){.section-head{grid-template-columns:1fr}}.section-head h2{font-family:var(--sans);font-weight:500;font-size:clamp(1.7rem,3.4vw,2.3rem);letter-spacing:-.018em;margin:0;line-height:1.1}.section-head h2 em{font-family:var(--serif);font-style:italic;font-weight:400;color:var(--accent-ink)}.section-head .section-deck{font-size:1.02rem;color:var(--ink-2);max-width:58ch}.rule{border:0;border-top:1px solid var(--rule);margin:0}.rule-strong{border-top-color:var(--rule-strong)}.foundations{background:var(--bg);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}.foundations-viz{margin:0 0 clamp(2.5rem,5vw,4rem);padding:clamp(1.5rem,3vw,2.5rem);border:1px solid var(--rule);background:linear-gradient(180deg,var(--bg) 0%,#f6f6f3 100%);position:relative}.foundations-viz:before{content:"Fig. 02 — The three foundations";position:absolute;top:-.72rem;left:1rem;background:var(--bg);padding:0 .5rem;font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;color:var(--muted);text-transform:uppercase}.foundations-viz svg{width:100%;height:auto;display:block}.foundation-list{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1.5rem,3vw,2.5rem)}@media(max-width:880px){.foundation-list{grid-template-columns:1fr}}.foundation{padding:1.75rem 0 0;border-top:2px solid var(--ink)}.foundation .f-num{font-family:var(--mono);font-size:.82rem;letter-spacing:.08em;color:var(--muted);margin-bottom:.8rem}.foundation h3{font-family:var(--sans);font-weight:500;font-size:1.22rem;letter-spacing:-.01em;margin:0 0 .8rem;line-height:1.25}.foundation h3 em{font-family:var(--serif);font-style:italic;font-weight:400;color:var(--accent-ink)}.foundation p{margin:0 0 .8rem;color:var(--ink-2);font-size:.98rem}.foundation .f-tag{font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;color:var(--muted);text-transform:uppercase}.familiar{background:var(--bg-alt)}.familiar-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}@media(max-width:880px){.familiar-grid{grid-template-columns:1fr}}.familiar-card{background:var(--bg);border:1px solid var(--rule);padding:1.75rem 1.5rem;position:relative}.familiar-card .f-label{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;color:var(--warn);text-transform:uppercase;margin-bottom:.75rem}.familiar-card h4{font-family:var(--serif);font-style:italic;font-weight:400;font-size:1.18rem;line-height:1.3;margin:0 0 .8rem;color:var(--ink)}.familiar-card p{margin:0;color:var(--ink-2);font-size:.96rem}.frames .frame{display:grid;grid-template-columns:1fr 2.2fr;gap:clamp(1.5rem,4vw,3rem);padding:clamp(2rem,4vw,3rem) 0;border-top:1px solid var(--rule)}.frames .frame:last-of-type{border-bottom:1px solid var(--rule)}@media(max-width:780px){.frames .frame{grid-template-columns:1fr}}.frames .f-head .f-num{font-family:var(--mono);font-size:.78rem;letter-spacing:.08em;color:var(--muted);margin-bottom:.5rem}.frames .f-head h3{font-family:var(--sans);font-weight:500;font-size:1.3rem;line-height:1.25;margin:0;letter-spacing:-.01em}.frames .f-body .f-quote{font-family:var(--serif);font-style:italic;font-weight:400;font-size:clamp(1.1rem,1.7vw,1.28rem);line-height:1.42;color:var(--ink);margin:0 0 1.1rem;max-width:56ch;border-left:3px solid var(--accent);padding-left:1.2rem}.frames .f-body p{color:var(--ink-2);margin:0 0 .75rem;max-width:58ch}.frames .f-body strong{color:var(--ink);font-weight:500}.engagements{background:var(--bg);border-top:1px solid var(--rule)}.engagement-list{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}@media(max-width:780px){.engagement-list{grid-template-columns:1fr}}.engagement{padding:2rem clamp(1rem,2.5vw,2rem);border-right:1px solid var(--rule);border-bottom:1px solid var(--rule);position:relative}.engagement:nth-child(2n){border-right:none}@media(max-width:780px){.engagement{border-right:none}}.engagement.lead{background:var(--accent-soft);grid-column:1 / -1;border-right:none}.engagement .e-num{font-family:var(--mono);font-size:.78rem;letter-spacing:.08em;color:var(--muted);margin-bottom:.6rem}.engagement.lead .e-num{color:var(--accent-ink)}.engagement h3{font-family:var(--sans);font-weight:500;font-size:1.22rem;margin:0 0 .8rem;letter-spacing:-.01em}.engagement.lead h3{font-size:1.5rem}.engagement.lead h3 em{font-family:var(--serif);font-style:italic;font-weight:400;color:var(--accent-ink)}.engagement p{color:var(--ink-2);margin:0;max-width:56ch;font-size:.98rem}.proof{background:var(--bg-alt)}.proof-intro{font-family:var(--serif);font-style:italic;font-weight:400;font-size:clamp(1.1rem,1.8vw,1.32rem);line-height:1.45;color:var(--ink);max-width:52ch;margin:0 0 clamp(2rem,4vw,3rem)}.artefacts{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule)}@media(max-width:780px){.artefacts{grid-template-columns:1fr}}.artefact{background:var(--bg);padding:1.5rem 1.4rem;text-decoration:none;color:var(--ink);display:flex;flex-direction:column;gap:.55rem;transition:background .14s ease}.artefact:hover{background:var(--accent-soft)}.artefact .a-kind{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}.artefact .a-title{font-family:var(--sans);font-weight:500;font-size:1.02rem;letter-spacing:-.005em}.artefact .a-note{font-size:.92rem;color:var(--ink-2)}.code-sample{margin:clamp(2rem,4vw,3rem) 0 0;border:1px solid var(--rule);background:#0f1117;color:#e6e8ef;padding:1.25rem 1.4rem;font-family:var(--mono);font-size:.86rem;line-height:1.55;overflow-x:auto;position:relative}.code-sample:before{content:"// Fig. 03 — One seam the AI can work in";display:block;color:#7a8096;margin-bottom:.8rem}.code-sample .k{color:#a8a3ff}.code-sample .s{color:#9ed7b3}.code-sample .c{color:#7a8096;font-style:italic}.code-sample .t{color:#ffc37a}.about{background:var(--bg);border-top:1px solid var(--rule)}.about-grid{display:grid;grid-template-columns:1fr 1.6fr;gap:clamp(2rem,5vw,4rem);align-items:start}@media(max-width:780px){.about-grid{grid-template-columns:1fr}}.about-mono{width:96px;height:96px;border:1px solid var(--rule-strong);display:inline-flex;align-items:center;justify-content:center;font-family:var(--serif);font-style:italic;font-size:2.2rem;color:var(--accent-ink);background:var(--bg)}.about p{max-width:58ch;color:var(--ink-2);margin:0 0 .9rem}.about p strong{color:var(--ink);font-weight:500}.cta-repeat{background:var(--ink);color:var(--bg);padding:clamp(3.5rem,7vw,5.5rem) 0;text-align:left}.cta-repeat h2{font-family:var(--sans);font-weight:500;font-size:clamp(1.7rem,3.3vw,2.4rem);letter-spacing:-.018em;margin:0 0 1.1rem;max-width:22ch;color:var(--bg)}.cta-repeat h2 em{font-family:var(--serif);font-style:italic;font-weight:400;color:#b9b9f5}.cta-repeat p{max-width:52ch;color:#c5c8d0;margin:0 0 2rem}.cta-repeat .hero-cta{background:var(--bg);color:var(--ink)}.cta-repeat .hero-cta:hover{background:var(--accent-soft);color:var(--accent-ink)}footer.foot{background:var(--bg-alt);border-top:1px solid var(--rule);padding:2.5rem 0 3rem;font-size:.9rem;color:var(--muted)}.foot-row{display:flex;flex-wrap:wrap;gap:1.25rem;justify-content:space-between;align-items:baseline}.foot-row a{color:var(--ink-2);text-decoration:none}.foot-row a:hover{color:var(--accent-ink);text-decoration:underline}.foot-links{display:flex;gap:1.25rem;flex-wrap:wrap}.foot-meta{margin-top:1.25rem;font-size:.82rem;color:var(--muted)}.reveal{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s ease;will-change:opacity,transform}.reveal.is-visible{opacity:1;transform:none}@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}.slab{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}.slabs-in .slab-1{opacity:1;transform:none;transition-delay:0ms}.slabs-in .slab-2{opacity:1;transform:none;transition-delay:.18s}.slabs-in .slab-3{opacity:1;transform:none;transition-delay:.36s}.slabs-in .slab-line{opacity:1;transition-delay:.54s}.slab-line{opacity:0;transition:opacity .4s ease}@media(prefers-reduced-motion:reduce){.slab,.slab-line{opacity:1;transform:none;transition:none}}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}