:root{
  --ink:#0a0a0a; --ink-800:#161616; --ink-700:#222222;
  --paper:#f2f0ea; --paper-dim:#e7e4dc;
  --signal-300:#fb794a; --signal-400:#f0662c; --signal-500:#eb5116; --signal-600:#c83406; --signal-700:#9c2704;
  --steel-300:#acaeb2; --steel-500:#6f7278; --steel-700:#42444a;
  --olive:#607c42; --brick:#a04034;
  --line:rgba(10,10,10,.12);
  --line-dark:rgba(242,240,234,.14);
  --sans:"Inter",system-ui,-apple-system,sans-serif;
  --display:"Oswald","Inter",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);
  -webkit-font-smoothing:antialiased;line-height:1.55}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--display);text-transform:uppercase;letter-spacing:.01em}
code{font-family:var(--mono);background:var(--paper-dim);padding:.1em .4em;font-size:.85em}
.muted{color:color-mix(in oklab, var(--ink) 55%, transparent)}

.test-banner{background:var(--ink);color:var(--signal-300);font-family:var(--mono);
  font-size:.76rem;letter-spacing:.08em;text-align:center;padding:.55rem 1rem;text-transform:uppercase;
  border-bottom:2px solid var(--signal-500)}
.test-banner b{color:var(--signal-300)}
.v1-link{display:block;text-align:center;background:var(--paper-dim);font-family:var(--mono);
  font-size:.76rem;padding:.4rem 1rem;color:var(--steel-700)}
.v1-link a{text-decoration:underline}

.nav{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  max-width:1180px;margin:0 auto;padding:1.1rem 1.5rem;border-bottom:1px solid var(--line)}
.nav-brand{display:flex;align-items:center;gap:.7rem;font-family:var(--display);font-weight:600;font-size:1.15rem;letter-spacing:.03em}
.nav-brand img{height:32px;width:32px}
.nav-links{display:flex;gap:1.3rem;flex-wrap:wrap;font-size:.85rem;font-family:var(--mono)}
.nav-links a{opacity:.65;text-transform:uppercase}
.nav-links a:hover{opacity:1}
.dl-all{background:var(--signal-500);color:#fff!important;padding:.4rem .9rem;opacity:1!important;font-weight:600}

.hero{position:relative;overflow:hidden;background:var(--ink);color:var(--paper);
  border-bottom:2px solid var(--signal-500)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:repeating-linear-gradient(0deg,transparent 0 3px,rgba(255,255,255,.03) 3px 4px)}
.hero-body{max-width:1180px;margin:0 auto;padding:3.2rem 1.5rem 4rem;position:relative;
  display:grid;grid-template-columns:1.3fr .7fr;gap:2.5rem;align-items:center;z-index:1}
@media (max-width:800px){.hero-body{grid-template-columns:1fr}}
.kicker{font-family:var(--mono);font-size:.78rem;color:var(--signal-300);letter-spacing:.12em;text-transform:uppercase;margin:0 0 1rem}
h1{font-size:clamp(2.2rem,5.6vw,3.4rem);font-weight:700;line-height:1.05;margin:0;color:var(--paper)}
.signal-text{color:var(--signal-400)}
.lede{max-width:52ch;margin:1.3rem 0 0;font-size:1.02rem;color:var(--steel-300)}
.hero-note{margin-top:1.3rem;font-size:.85rem;color:var(--steel-300);max-width:52ch;font-family:var(--mono)}

.hero-mark-wrap{display:grid;place-items:center}
.hero-mark{position:relative;width:200px;height:200px;display:grid;place-items:center}
.hero-mark svg{width:100%;height:100%}
.hero-mark .chevron{transform-origin:center}
@media (prefers-reduced-motion:no-preference){
  .hero-mark .chevron-1{animation:cpi-rise 2.4s ease-in-out infinite}
  .hero-mark .chevron-2{animation:cpi-rise 2.4s ease-in-out .15s infinite}
  .hero-mark .chevron-3{animation:cpi-rise 2.4s ease-in-out .3s infinite}
}
@keyframes cpi-rise{0%,100%{transform:translateY(0)}50%{transform:translateY(-2px)}}

main{max-width:1180px;margin:0 auto}
.section{padding:4rem 1.5rem;border-bottom:1px solid var(--line)}
.section-head{margin-bottom:2rem;max-width:70ch}
.eyebrow{font-family:var(--mono);font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;color:var(--signal-600);margin:0}
.eyebrow::before{content:"// "}
h2{font-size:clamp(1.5rem,3.2vw,2.1rem);font-weight:700;margin:.4rem 0 .5rem}

.grid{display:grid;gap:2px;background:var(--line);border:1px solid var(--line);overflow:hidden;
  grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.card{background:#fff;display:flex;flex-direction:column}
.preview{aspect-ratio:1.5;display:grid;place-items:center;padding:1.6rem;position:relative}
.preview.on-paper{background:var(--paper)}
.preview.on-ink{background:var(--ink)}
.preview img,.preview svg{max-height:64px;max-width:80%}
.card-meta{padding:.9rem 1.1rem;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:.6rem}
.card-meta .name{font-size:.86rem;font-weight:600;text-transform:uppercase;letter-spacing:.02em}
.card-meta .sub{font-size:.74rem;color:color-mix(in oklab, var(--ink) 50%, transparent);font-family:var(--mono)}
.dl-row{display:flex;gap:.4rem;flex-wrap:wrap}
.dl{font-family:var(--mono);font-size:.72rem;border:1px solid var(--ink);padding:.2rem .5rem}
.dl:hover{background:var(--ink);color:var(--paper)}

.colors{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.swatch{background:#fff;cursor:pointer;padding:1.1rem;display:flex;flex-direction:column;gap:.6rem;border:none;text-align:left;font-family:inherit}
.swatch .chip{height:52px}
.swatch .tok{font-size:.8rem;font-weight:600;text-transform:uppercase;font-family:var(--mono);letter-spacing:.01em}
.swatch .hex{font-family:var(--mono);font-size:.76rem;color:color-mix(in oklab, var(--ink) 55%, transparent)}

.type-sample{padding:1.6rem;background:#fff}
.type-sample.display{font-family:var(--display);font-size:2.4rem;font-weight:700;text-transform:uppercase;line-height:1.05}
.type-sample .stack{font-family:var(--mono);font-size:.76rem;color:color-mix(in oklab, var(--ink) 55%, transparent);margin-top:.5rem;cursor:pointer}

table.matrix{width:100%;border-collapse:collapse;font-size:.9rem;background:#fff;border:1px solid var(--line)}
table.matrix th,table.matrix td{padding:.75rem 1rem;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.matrix th{font-family:var(--mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--signal-600);background:var(--paper-dim)}
table.matrix tr:last-child td{border-bottom:none}

.rules{display:grid;grid-template-columns:1fr 1fr;gap:2px;background:var(--line);border:1px solid var(--line)}
@media (max-width:700px){.rules{grid-template-columns:1fr}}
.rule{background:#fff;padding:1.6rem}
.rule h3{margin:0 0 .8rem;font-size:1rem}
.rule.do h3{color:var(--olive)}
.rule.dont h3{color:var(--brick)}
.rule ul{margin:0;padding-left:1.1rem;font-size:.9rem}
.rule li{margin-bottom:.5rem}

.foot{max-width:1180px;margin:0 auto;padding:2.5rem 1.5rem 3.5rem;font-size:.85rem;color:color-mix(in oklab, var(--ink) 55%, transparent);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;font-family:var(--mono)}
.foot a{text-decoration:underline}

.toast{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:var(--paper);padding:.55rem 1.1rem;font-size:.82rem;
  opacity:0;pointer-events:none;transition:.2s;font-family:var(--mono)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}