/* Hallmark · macrostructure: Workbench · nav: N5 Floating pill · footer: Ft1 Mast-headed
 * hero: H2 Split Diptych (ratio 7/5, right=rotating showcase, divider=negative-space)
 * theme: studied-DNA (source: https://www.tasteskill.dev/) · paper oklch(96% 0.014 75) · accent oklch(62% 0.19 45)
 * display: Space Grotesk (geometric grotesque) · body: IBM Plex Sans · outlier: JetBrains Mono
 * genre: modern-minimal · studied: yes · DNA-source: url
 * pre-emit critique: P4 H4 E4 S4 R4 V4
 */

*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:clip}
body{overflow-x:clip}
[id]{scroll-margin-top:6.5rem}

body{
  margin:0;background:var(--color-paper);color:var(--color-ink);
  font-family:var(--font-body);line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
p{margin:0;color:var(--color-muted)}
h1,h2,h3{font-family:var(--font-display);font-weight:700;margin:0;letter-spacing:-0.02em;color:var(--color-ink)}

:focus-visible{outline:2px solid var(--color-focus);outline-offset:3px;border-radius:4px}

/* ===== buttons / cta ===== */
.cta-outline{
  display:inline-flex;align-items:center;gap:0.5em;
  padding:0.9rem 1.4rem;border:1.5px solid var(--color-ink);border-radius:var(--radius);
  font-family:var(--font-body);font-weight:600;font-size:var(--text-sm);
  min-height:44px;white-space:nowrap;
  transition:background var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}
.cta-outline:hover{background:var(--color-ink);color:var(--color-paper)}
.cta-outline:active{transform:scale(0.98)}
.btn-primary{
  display:inline-flex;align-items:center;padding:0.6rem 1.2rem;border-radius:var(--radius-pill);
  background:var(--color-accent);color:var(--color-accent-ink);font-weight:600;font-size:var(--text-sm);
  min-height:40px;white-space:nowrap;
  transition:transform var(--dur-micro) var(--ease-out);
}
.btn-primary:hover{transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}

/* ===== nav — N5 floating pill ===== */
#hdr-wrap{position:sticky;top:0;z-index:var(--z-sticky);display:flex;justify-content:center;padding:var(--space-md) var(--space-md) 0}
.nav{
  width:100%;max-width:56rem;height:60px;
  display:flex;align-items:center;justify-content:space-between;gap:var(--space-lg);
  padding:0 var(--space-xs) 0 var(--space-lg);border-radius:var(--radius-pill);
  border:1px solid var(--color-rule);
  background:color-mix(in srgb, var(--color-paper) 82%, transparent);
  backdrop-filter:saturate(1.3) blur(14px);
  box-shadow:0 10px 30px oklch(20% 0.02 60 / 0.08);
}
.wordmark{font-family:var(--font-mono);font-weight:500;font-size:var(--text-sm);letter-spacing:-0.01em}
.wordmark span{color:var(--color-accent)}
.nav nav{display:flex;gap:var(--space-lg)}
.nav nav a{font-size:var(--text-sm);color:var(--color-muted);transition:color var(--dur-short) var(--ease-out)}
.nav nav a:hover{color:var(--color-ink)}
.nav-cta{margin-right:2px}

#menuBtn{display:none;width:36px;height:36px;border:0;background:none;cursor:pointer;flex:none;align-items:center;justify-content:center;flex-direction:column;gap:5px}
#menuBtn span{display:block;width:18px;height:2px;background:var(--color-ink);border-radius:2px;transition:transform var(--dur-short) var(--ease-out),opacity var(--dur-short)}
#menuBtn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
#menuBtn[aria-expanded="true"] span:nth-child(2){opacity:0}
#menuBtn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
#mobileMenu{display:none}

/* ===== hero — H2 split diptych 7/5 ===== */
.hero-split{
  max-width:72rem;margin:0 auto;padding:var(--space-2xl) var(--space-lg) var(--space-3xl);
  display:grid;grid-template-columns:7fr 5fr;gap:var(--space-2xl);align-items:center;
}
.hero-text h1{font-size:var(--text-display);line-height:1.08;max-width:14ch;overflow-wrap:anywhere;min-width:0}
.lede{margin-top:var(--space-lg);font-size:var(--text-md);max-width:48ch;color:var(--color-muted)}
.hero-cta{margin-top:var(--space-xl)}

.hero-showcase{position:relative;height:420px;perspective:1400px}
.showcase-img{
  position:absolute;top:50%;left:50%;width:58%;aspect-ratio:4/5;
  border-radius:var(--radius);border:1px solid var(--color-rule);
  box-shadow:0 24px 50px oklch(20% 0.02 60 / 0.16);
  object-fit:cover;background:var(--color-paper-2);
  transition:transform var(--dur-xlong) var(--ease-out), opacity var(--dur-xlong) var(--ease-out);
  will-change:transform,opacity;
}
/* three arc positions a card can occupy — swapped by JS via class, never by moving/resizing the box itself */
.showcase-img.slot-front{transform:translate(-50%,-50%) translate(8%,-6%) rotate(-2deg) scale(1);opacity:1;z-index:3}
.showcase-img.slot-left {transform:translate(-50%,-50%) translate(-46%,4%) rotate(-9deg) scale(0.76);opacity:0.55;z-index:2}
.showcase-img.slot-right{transform:translate(-50%,-50%) translate(38%,22%) rotate(8deg) scale(0.68);opacity:0.4;z-index:1}

/* ===== stat strip — T4 ===== */
.stat-strip{
  max-width:72rem;margin:0 auto;padding:var(--space-xl) var(--space-lg);
  display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-xl);
  border-top:1px solid var(--color-rule);border-bottom:1px solid var(--color-rule);
}
.stat-strip .num{display:block;font-family:var(--font-mono);font-size:var(--text-2xl);font-weight:500;color:var(--color-accent);font-variant-numeric:tabular-nums}
.stat-strip .lbl{display:block;margin-top:var(--space-xs);font-size:var(--text-sm);color:var(--color-muted);max-width:24ch}

/* ===== section head ===== */
.sec-head{max-width:72rem;margin:0 auto;padding:0 var(--space-lg);margin-bottom:var(--space-xl)}
.sec-head h2{font-size:var(--text-xl)}
.sec-head p{margin-top:var(--space-sm);font-size:var(--text-md);max-width:56ch}

/* ===== F5 annotated screenshot ===== */
.annotated-sec{padding:var(--space-3xl) 0 var(--space-2xl)}
.annotated{margin:0 auto;max-width:32rem;position:relative;padding:0 var(--space-lg)}
.annotated img{width:100%;border-radius:var(--radius);border:1px solid var(--color-rule);box-shadow:0 20px 40px oklch(20% 0.02 60 / 0.12)}
.callout{
  position:absolute;max-width:15rem;padding:var(--space-sm) var(--space-md);
  background:var(--color-ink);color:var(--color-paper);border-radius:var(--radius);
  font-size:var(--text-xs);line-height:1.4;
  left:var(--x);top:var(--y);transform:translate(-50%,-50%);
  box-shadow:0 10px 24px oklch(20% 0.02 60 / 0.2);
}

/* ===== F4 step sequence ===== */
.steps-sec{padding:var(--space-2xl) 0 var(--space-3xl)}
.steps{max-width:72rem;margin:0 auto;padding:0 var(--space-lg);list-style:none;
  display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-xl);
  border-top:1px solid var(--color-rule);padding-top:var(--space-xl)}
.steps li{padding:0}
.stage{display:block;font-family:var(--font-display);font-weight:700;font-size:var(--text-sm);color:var(--color-accent);margin-bottom:var(--space-md)}
.steps h3{font-size:var(--text-lg);margin-bottom:var(--space-sm)}
.steps p{font-size:var(--text-sm)}

/* ===== final CTA ===== */
.cta-sec{
  max-width:72rem;margin:0 auto var(--space-3xl);padding:var(--space-2xl) var(--space-lg);
  display:flex;align-items:center;justify-content:space-between;gap:var(--space-lg);flex-wrap:wrap;
  border:1px solid var(--color-rule);border-radius:var(--radius);background:var(--color-paper-2);
}
.cta-sec h2{font-size:var(--text-lg);max-width:22ch}

/* ===== footer — Ft1 mast-headed ===== */
.foot-mast{
  max-width:72rem;margin:0 auto;padding:var(--space-xl) var(--space-lg) var(--space-2xl);
  display:flex;align-items:center;justify-content:space-between;gap:var(--space-md);flex-wrap:wrap;
  border-top:1px solid var(--color-rule);
}
.foot-mast .wordmark{font-size:var(--text-md)}
.foot-mast p{font-size:var(--text-sm);color:var(--color-muted)}
.foot-mast a{color:var(--color-muted);transition:color var(--dur-short) var(--ease-out)}
.foot-mast a:hover{color:var(--color-accent)}

/* ===== reduced motion ===== */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{transition-duration:150ms !important;animation-duration:150ms !important}
}

/* ===== mobile ===== */
@media (max-width:60rem){
  .hero-split{grid-template-columns:1fr}
  .hero-showcase{height:300px;margin-top:var(--space-lg)}
  .stat-strip{grid-template-columns:1fr;gap:var(--space-lg)}
  .steps{grid-template-columns:1fr}
}
@media (max-width:40rem){
  .nav nav{display:none}
  .nav-cta{display:none}
  #menuBtn{display:flex}
  #mobileMenu{
    display:grid;grid-template-rows:0fr;opacity:0;
    margin:var(--space-sm) var(--space-md) 0;
    border-radius:16px;border:1px solid transparent;background:var(--color-paper);
    transition:grid-template-rows var(--dur-short) var(--ease-out),opacity var(--dur-short),border-color var(--dur-short);
  }
  #mobileMenu > *{overflow:hidden}
  #mobileMenu.open{grid-template-rows:1fr;opacity:1;border-color:var(--color-rule)}
  #mobileMenu-inner{display:flex;flex-direction:column;gap:2px;padding:var(--space-sm);min-height:0}
  #mobileMenu a{padding:var(--space-sm) var(--space-md);border-radius:10px;font-size:var(--text-md);min-height:44px;display:flex;align-items:center}
  #mobileMenu a:hover,#mobileMenu a:focus-visible{background:var(--color-paper-2)}
  .hero-text h1{font-size:var(--text-2xl)}
  .callout{position:static;transform:none;margin-top:var(--space-sm);max-width:none}
  .annotated{display:flex;flex-direction:column;gap:var(--space-sm)}
  .cta-sec{flex-direction:column;align-items:flex-start}
  .foot-mast{flex-direction:column;align-items:flex-start}
}