/* Onderly, systematic light.
   Third pole: near white ground, true black type, a visible structural grid, and a
   single saturated accent that only ever marks a live state (rule 310). Product is
   drawn, never screenshotted (rule 292). */

:root{
  --ground:#FBFBFA;
  --ground-2:#F2F2F0;
  --ink:#0A0A0A;
  --ink-65:#5A5A57;
  --ink-40:#8E8E8A;
  --rule:#E0E0DC;
  --rule-2:#C9C9C4;
  --live:#1D4ED8;          /* state marker only */

  --display:"Space Grotesk","Helvetica Neue",Arial,sans-serif;
  --body:"Manrope","Helvetica Neue",Arial,sans-serif;
  --mono:"Roboto Mono","SFMono-Regular",Menlo,Consolas,monospace;

  --wrap:min(92%,1520px);
  --sec-y:clamp(4.5rem,9vw,8.5rem);
  --nav-h:4.75rem;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ground);color:var(--ink);
  font-family:var(--body);
  font-size:clamp(1rem,.4vw + .93rem,1.075rem);
  line-height:1.62;-webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:inherit}

.skip{position:absolute;left:-9999px}
.skip:focus{left:1rem;top:1rem;z-index:400;background:var(--ink);color:var(--ground);padding:.6rem 1rem}

.wrap{width:var(--wrap);margin-inline:auto}

/* Display is tight and geometric, sentence case, short lines. Mono carries every
   label and unit. Nothing sits in the 20 to 40px range (rule 311). */
.display{
  font-family:var(--display);font-weight:500;
  font-size:clamp(2.6rem,4.4vw,4.1rem);
  line-height:1.04;letter-spacing:-.022em;
  margin:.9rem 0 0;max-width:19ch;text-wrap:balance;
}
.plate{
  font-family:var(--mono);font-size:.6875rem;font-weight:500;
  letter-spacing:.11em;text-transform:uppercase;color:var(--ink-40);
  margin:0;font-feature-settings:'tnum' 1;
}
.plate .sep{color:var(--rule-2);padding:0 .35em}
.lede{max-width:56ch;color:var(--ink-65);margin:1.4rem 0 0}

.dot{
  display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--live);margin-right:.7em;vertical-align:middle;
}

/* Navigation sits in normal flow here, so the hero is calc(100svh - nav) (rule 339). */
.nav{
  position:sticky;top:0;z-index:100;height:var(--nav-h);
  background:var(--ground);border-bottom:1px solid var(--rule);
}
.nav-inner{height:100%;display:flex;align-items:center;gap:clamp(1rem,2.5vw,3rem)}
.brand{
  font-family:var(--display);font-weight:600;font-size:1.2rem;
  letter-spacing:-.02em;text-decoration:none;margin-right:auto;
}
.nav-links{display:flex;gap:clamp(1rem,2vw,2.25rem)}
.nav-links a{
  font-family:var(--mono);font-size:.6875rem;letter-spacing:.11em;text-transform:uppercase;
  text-decoration:none;color:var(--ink-65);padding:.5rem 0;
  border-bottom:1px solid transparent;transition:color .2s,border-color .2s;
}
.nav-links a:hover{color:var(--ink);border-color:var(--ink)}

.burger{display:none;position:relative;z-index:220;width:44px;height:44px;background:none;border:0;cursor:pointer;padding:0}
.burger span{display:block;height:1px;width:24px;margin:5px auto;background:var(--ink)}

.drawer{
  position:fixed;inset:0;z-index:210;background:var(--ground);
  display:flex;flex-direction:column;justify-content:center;padding:clamp(1.25rem,5vw,3rem);
  opacity:0;visibility:hidden;pointer-events:none;transition:opacity .3s ease,visibility .3s;
}
.drawer.open{opacity:1;visibility:visible;pointer-events:auto}
.drawer-close{
  position:absolute;top:1.15rem;right:clamp(1.25rem,5vw,3rem);min-height:44px;
  background:none;border:0;cursor:pointer;color:var(--ink);
  font-family:var(--mono);font-size:.6875rem;letter-spacing:.11em;text-transform:uppercase;
}
.drawer-links{display:flex;flex-direction:column;gap:.4rem}
.drawer-links a{
  font-family:var(--display);font-weight:500;font-size:clamp(1.9rem,8vw,2.6rem);
  letter-spacing:-.02em;line-height:1.3;text-decoration:none;min-height:44px;
}

/* Hero: the nav is in flow, so the first fold ends at the hero's bottom edge. */
.hero{
  min-height:calc(100svh - var(--nav-h) - var(--banner-h));height:calc(100svh - var(--nav-h) - var(--banner-h));
  display:flex;align-items:center;border-bottom:1px solid var(--rule);
}
.hero-inner{
  padding-block:clamp(2rem,5vh,4rem);
  display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
  gap:clamp(2rem,5vw,6rem);align-items:center;
}
.hero-panel{border-top:1px solid var(--ink);padding-top:1.1rem}
.steps{list-style:none;margin:1.4rem 0 0;padding:0}
.steps li{
  display:grid;grid-template-columns:2.6rem minmax(0,1fr);
  column-gap:.9rem;align-items:baseline;
  border-top:1px solid var(--rule);padding:.95rem 0;
}
.steps li:first-child{border-top:0;padding-top:0}
.step-n{font-family:var(--mono);font-size:.6875rem;letter-spacing:.11em;color:var(--ink-40);font-feature-settings:'tnum' 1}
.step-l{font-family:var(--display);font-weight:500;font-size:1.15rem;letter-spacing:-.015em}
.step-d{grid-column:2;font-family:var(--mono);font-size:.6875rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-40);line-height:1.7;margin-top:.2rem}
.live{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--live);margin-left:.55em;vertical-align:middle}
.hero h1{
  font-family:var(--display);font-weight:500;
  font-size:clamp(2.6rem,5.6vw,5rem);
  line-height:1.02;letter-spacing:-.03em;
  margin:1.1rem 0 0;max-width:16ch;text-wrap:balance;
}
.hero-sub{max-width:52ch;color:var(--ink-65);margin:1.5rem 0 0}
.hero-actions{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:2.1rem}
.hero-note{font-family:var(--mono);font-size:.6875rem;letter-spacing:.06em;color:var(--ink-40);margin:1.75rem 0 0;max-width:52ch;line-height:1.7}

.btn{
  display:inline-flex;align-items:center;min-height:48px;padding:0 1.5rem;
  background:var(--ink);color:var(--ground);text-decoration:none;
  font-family:var(--mono);font-size:.6875rem;letter-spacing:.11em;text-transform:uppercase;
  transition:background .2s;
}
.btn:hover{background:#000}
.btn-quiet{background:none;color:var(--ink);box-shadow:inset 0 0 0 1px var(--rule-2)}
.btn-quiet:hover{background:none;box-shadow:inset 0 0 0 1px var(--ink)}
.btn-sm{min-height:40px;padding:0 1.1rem}

.section{padding-block:var(--sec-y);border-bottom:1px solid var(--rule)}
.band{background:var(--ground-2)}

.cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(1.5rem,3.5vw,4rem);margin-top:2rem}
.cols p{color:var(--ink-65);margin:0}

/* Drawn instrument. Hairlines and mono labels, one accent marking a live state. */
.diagram{margin-top:clamp(2.5rem,5vw,4rem)}
.flow{width:100%;height:auto;overflow:visible}
.flow text{font-family:var(--mono);font-size:11px;letter-spacing:.11em;text-transform:uppercase;fill:var(--ink-40)}
.dg-src rect,.dg-node rect{fill:none;stroke:var(--rule-2);stroke-width:1}
.dg-node rect{fill:var(--ground)}
.dg-alt rect{fill:none;stroke-dasharray:3 3}
.dg-line path{fill:none;stroke:var(--rule-2);stroke-width:1}
.dg-dashed path{stroke-dasharray:4 4}
.dg-num text{fill:var(--ink-40)}
.dg-label text,text.dg-label{
  font-family:var(--display) !important;font-size:19px !important;font-weight:500;
  letter-spacing:-.01em !important;text-transform:none !important;fill:var(--ink);
}
.dg-alt-t text{fill:var(--ink-65)}
.dg-live{fill:var(--live)}
.dg-live-t{fill:var(--live) !important}
.dg-side{fill:var(--ink-40)}
.dg-term rect{fill:none;stroke:var(--rule-2);stroke-width:1}
.dg-term line{stroke:var(--rule);stroke-width:1}
.dg-axis line{stroke:var(--rule);stroke-width:1}
.dg-axis text{fill:var(--ink-40)}
.diagram-note{margin-top:1.1rem;color:var(--ink-40)}

.repl{
  list-style:none;margin:clamp(2.5rem,5vw,4rem) 0 0;margin-inline:auto;padding:0;
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(1.5rem,2.6vw,3rem);
}
.repl li{border-top:1px solid var(--rule-2);padding-top:1.15rem}
.repl h3{font-family:var(--body);font-weight:500;font-size:1.1rem;line-height:1.4;margin:.85rem 0 .55rem}
.repl p:last-child{color:var(--ink-65);margin:0;font-size:.97rem}

.fit{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:clamp(2rem,5vw,6rem);align-items:start}
.fit-body p{color:var(--ink-65);margin:0 0 1.15rem;max-width:56ch}
.fit-body p:last-child{margin-bottom:0}

.contact{border-bottom:0}

.foot{border-top:1px solid var(--rule);padding-block:clamp(2.5rem,5vw,4.5rem)}
.foot-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(2rem,5vw,6rem)}
.brand-foot{font-family:var(--display);font-weight:600;font-size:1.2rem;letter-spacing:-.02em;margin:0}
.foot-note{color:var(--ink-65);font-size:.92rem;margin:.55rem 0 0;max-width:54ch}

.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .65s ease,transform .65s ease}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  *{scroll-behavior:auto !important}
}

@media (max-width:1180px){
  .repl{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:920px){
  .hero-inner{grid-template-columns:minmax(0,1fr);gap:2rem;align-items:start}
  .hero-panel{display:none}
  .nav-links,.nav-cta{display:none}
  .burger{display:block}
  .cols{grid-template-columns:minmax(0,1fr)}
  .fit{grid-template-columns:minmax(0,1fr)}
  .foot-inner{grid-template-columns:minmax(0,1fr)}
  /* The drawing is wide by nature; let it scroll in its own container rather than
     shrinking its 11px labels below legibility. */
  .diagram{overflow-x:auto;overscroll-behavior-x:contain}
  .flow{min-width:900px}
}
@media (max-width:600px){
  .repl{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:480px){
  .btn{width:100%;justify-content:center}
}
@media (pointer:coarse){
  .nav-links a,.drawer-links a{min-height:44px;display:inline-flex;align-items:center}
}

/* Concept banner. Sits in normal flow, so every hero height below subtracts
   --banner-h and the first fold still ends exactly at the viewport bottom
   (rule 339). */
:root{ --banner-h: 34px; }
.concept-banner{
  min-height:var(--banner-h); display:flex; align-items:center; justify-content:center;
  padding:0 1rem; text-align:center;
  background:#0A0A0A; color:#FBFBFA;
  font-family:var(--mono, ui-monospace, Menlo, monospace);
  font-size:.625rem; letter-spacing:.1em; text-transform:uppercase; line-height:1.2;
}
@media (max-width:640px){ :root{ --banner-h: 44px; } .concept-banner{ font-size:.5625rem; letter-spacing:.06em; } }