:root{
  --paper:#F4F5F2;
  --paper-2:#ECEEE8;
  --ink:#14161A;
  --ink-soft:#3A3E44;
  --grey:#8A8F87;
  --rule:#E2E4DE;
  --blue:#2A4B7C;
  --blue-ink:#1D3557;
  --red:#B3423A;
  --shadow:0 1px 0 rgba(20,22,26,.04), 0 8px 30px -18px rgba(20,22,26,.35);
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --w:60rem;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  background:var(--paper);
  line-height:1.55;
  font-size:17px;
  letter-spacing:-0.006em;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
img,svg{max-width:100%;display:block}

.wrap{max-width:var(--w);margin:0 auto;padding:0 1.5rem}

/* top bar */
.top{border-bottom:1px solid var(--rule);position:sticky;top:0;background:rgba(244,245,242,.86);backdrop-filter:saturate(1.2) blur(8px);z-index:10}
.top .wrap{display:flex;align-items:center;gap:1.5rem;height:60px}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:650;letter-spacing:-0.02em;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .mark{width:22px;height:22px}
.nav{margin-left:auto;display:flex;gap:1.4rem;align-items:center}
.nav a{color:var(--ink-soft);font-size:.95rem}
.nav a:hover{color:var(--ink)}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  background:var(--blue);color:#fff;padding:.55rem .95rem;border-radius:7px;
  font-weight:560;font-size:.95rem;border:1px solid var(--blue-ink);box-shadow:var(--shadow);
}
.btn:hover{background:var(--blue-ink);text-decoration:none}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--rule);box-shadow:none}
.btn.ghost:hover{background:var(--paper-2)}

/* hero */
.hero{padding:5.5rem 0 3.5rem}
.eyebrow{font-family:var(--mono);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--grey);margin:0 0 1.1rem}
h1{font-size:clamp(2.1rem,5vw,3.35rem);line-height:1.06;letter-spacing:-0.03em;margin:0 0 1.1rem;font-weight:680;max-width:16ch}
.lede{font-size:1.18rem;color:var(--ink-soft);max-width:46ch;margin:0 0 1.9rem}
.cta-row{display:flex;gap:.75rem;flex-wrap:wrap;align-items:center}
.cta-note{font-size:.85rem;color:var(--grey);margin-left:.3rem}

/* the signature: a paper card with a live typing caret */
.paper-demo{
  margin-top:3.2rem;background:#fff;border:1px solid var(--rule);border-radius:12px;
  box-shadow:var(--shadow);overflow:hidden;
}
.paper-demo .bar{display:flex;align-items:center;gap:.5rem;padding:.65rem .9rem;border-bottom:1px solid var(--rule);background:var(--paper);}
.dot{width:10px;height:10px;border-radius:50%;background:var(--rule)}
.paper-demo .bar .title{margin-left:.6rem;font-family:var(--mono);font-size:.8rem;color:var(--grey)}
.paper-demo .sheet{
  padding:2.4rem clamp(1.2rem,4vw,3.2rem);min-height:220px;
  font-family:var(--mono);font-size:1.02rem;line-height:1.9;color:var(--ink);
  background:
    linear-gradient(90deg,transparent 0 3.1rem,var(--red) 3.1rem 3.11rem,transparent 3.11rem) ,
    repeating-linear-gradient(var(--paper) 0 1.89rem,var(--rule) 1.89rem 1.9rem);
  background-attachment:local;
}
.type-line{white-space:pre-wrap}
.caret{display:inline-block;width:2px;height:1.15em;background:var(--ink);vertical-align:-0.18em;margin-left:1px;animation:blink 1.05s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* sections */
section.block{padding:4rem 0;border-top:1px solid var(--rule)}
.kicker{font-family:var(--mono);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--grey);margin:0 0 .8rem}
h2{font-size:clamp(1.5rem,3vw,2rem);letter-spacing:-0.02em;margin:0 0 1.4rem;font-weight:640}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.card{background:#fff;border:1px solid var(--rule);border-radius:10px;padding:1.4rem;box-shadow:var(--shadow)}
.card h3{margin:.2rem 0 .5rem;font-size:1.06rem;letter-spacing:-0.01em}
.card p{margin:0;color:var(--ink-soft);font-size:.97rem}
.card .ic{width:26px;height:26px;color:var(--blue);margin-bottom:.7rem}

.shot{margin-top:1.6rem;border:1px solid var(--rule);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);background:#fff}

/* quote / margin note */
.marginwrap{display:grid;grid-template-columns:1fr;gap:1rem;max-width:44rem}
blockquote{margin:0;font-size:1.35rem;line-height:1.4;letter-spacing:-0.01em}
blockquote .by{display:block;margin-top:.9rem;font-size:.95rem;color:var(--grey);font-style:normal}
.q-mark{color:var(--red);font-family:var(--mono)}

/* two-col text */
.two{display:grid;grid-template-columns:1fr 1fr;gap:2.4rem}
.two p{color:var(--ink-soft)}

/* footer */
footer{border-top:1px solid var(--rule);margin-top:2rem;padding:2.6rem 0;color:var(--grey);font-size:.92rem}
footer .wrap{display:flex;flex-wrap:wrap;gap:1.4rem;align-items:baseline}
footer a{color:var(--ink-soft)}
footer .cols{margin-left:auto;display:flex;gap:2rem}
footer .cols div{display:flex;flex-direction:column;gap:.45rem}

/* changelog / about pages */
.page{padding:3.5rem 0 1rem}
.log{border-left:2px solid var(--rule);margin-left:.2rem;padding-left:1.6rem}
.log .rel{margin-bottom:2.2rem;position:relative}
.log .rel::before{content:"";position:absolute;left:calc(-1.6rem - 2px);top:.55rem;width:9px;height:9px;border-radius:50%;background:var(--blue);transform:translateX(-4px)}
.log .ver{font-family:var(--mono);font-size:.9rem;color:var(--blue);font-weight:600}
.log .date{font-family:var(--mono);font-size:.8rem;color:var(--grey);margin-left:.6rem}
.log ul{margin:.6rem 0 0;padding-left:1.1rem;color:var(--ink-soft)}
.log li{margin:.3rem 0}
.prose{max-width:40rem}
.prose p{color:var(--ink-soft);margin:0 0 1.1rem}
.prose h2{margin-top:2rem}

@media (max-width:760px){
  .grid,.two{grid-template-columns:1fr}
  .nav a:not(.btn){display:none}
  .hero{padding:3.5rem 0 2.5rem}
  footer .cols{width:100%;margin-left:0;flex-wrap:wrap;gap:1.4rem}
}
@media (prefers-reduced-motion:reduce){
  .caret{animation:none}
}