:root {
  --navy: #071726;
  --navy-light: #0d2436;
  --ink: #132d40;
  --paper: #f1eee6;
  --paper-deep: #ded8ca;
  --steel: #9cabb4;
  --line: rgba(228, 221, 207, .24);
  --copper: #b97848;
  --copper-light: #d59a6d;
  --font-condensed: "Arial Narrow", "Aptos Narrow", "DIN Condensed", sans-serif;
  --font-body: "Aptos", "Helvetica Neue", sans-serif;
  --font-mono: "SFMono-Regular", "IBM Plex Mono", "Liberation Mono", monospace;
  --space-1: .4rem;
  --space-2: .8rem;
  --space-3: 1.2rem;
  --space-4: 2rem;
  --space-5: 3.5rem;
  --space-6: clamp(4.5rem, 9vw, 9rem);
  --ease: cubic-bezier(.22, 1, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { color-scheme: dark; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--navy);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent calc(25% - 1px), rgba(255,255,255,.03) 25%, transparent calc(25% + 1px)),
    linear-gradient(90deg, transparent calc(75% - 1px), rgba(255,255,255,.03) 75%, transparent calc(75% + 1px)),
    repeating-linear-gradient(0deg, rgba(255,255,255,.012) 0, rgba(255,255,255,.012) 1px, transparent 1px, transparent 5px);
}
a { color: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 {
  margin-bottom: var(--space-3);
  font-family: var(--font-condensed);
  font-stretch: condensed;
  font-weight: 700;
  line-height: .96;
  letter-spacing: -.035em;
}
h1 { font-size: clamp(4.2rem, 10.3vw, 10.5rem); }
h2 { font-size: clamp(3rem, 6.2vw, 6.2rem); }
h3 { font-size: clamp(1.4rem, 2.2vw, 2.15rem); }

.skip-link {
  position: fixed;
  top: .75rem;
  left: .75rem;
  z-index: 20;
  padding: .7rem 1rem;
  background: var(--paper);
  color: var(--navy);
  transform: translateY(-160%);
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--copper-light); outline-offset: 4px; }
.site-frame { width: min(100%, 1920px); margin-inline: auto; padding-inline: clamp(1rem, 3vw, 3.5rem); }

.site-header {
  min-height: 6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  border-bottom: 1px solid var(--line);
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  text-decoration: none;
  font-family: var(--font-condensed);
  font-weight: 700;
  letter-spacing: .08em;
}
.wordmark-mark {
  width: 2.2rem;
  height: 2.2rem;
  display: grid;
  place-items: center;
  background: var(--copper);
  color: var(--navy);
}
.site-nav { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2.5rem); }
.site-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--steel);
  font-size: .78rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .06em;
  transition: color .18s ease;
}
.site-nav a:hover, .site-nav a:focus-visible { color: var(--paper); }
.site-nav .language-link { padding-inline: .85rem; border: 1px solid var(--line); color: var(--paper); }

.hero {
  min-height: min(860px, calc(100vh - 6rem));
  display: grid;
  grid-template-columns: minmax(4rem, .18fr) 1.2fr minmax(18rem, .62fr);
  align-items: stretch;
  border-bottom: 1px solid var(--line);
}
.hero-index {
  padding-block: var(--space-4);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--steel);
  font: .68rem/1.2 var(--font-mono);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  letter-spacing: .1em;
}
.hero-copy {
  align-self: center;
  padding: var(--space-6) clamp(1rem, 4vw, 5rem) var(--space-6) 0;
  animation: hero-in .9s var(--ease) both;
}
.eyebrow, .section-code {
  margin-bottom: var(--space-3);
  color: var(--copper-light);
  font: 700 .72rem/1.2 var(--font-mono);
  letter-spacing: .11em;
  text-transform: uppercase;
}
.hero h1 span { color: var(--copper-light); }
.hero-lede {
  max-width: 62ch;
  margin-bottom: var(--space-4);
  color: #c6cdd0;
  font-size: clamp(1rem, 1.3vw, 1.25rem);
}
.contact-action {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  padding: .8rem 1.15rem;
  border: 1px solid var(--copper);
  background: var(--copper);
  color: var(--navy);
  font: 700 .82rem/1.1 var(--font-mono);
  text-decoration: none;
  text-transform: uppercase;
  transition: background .18s ease, color .18s ease, transform .18s ease;
}
.contact-action:hover { background: transparent; color: var(--paper); transform: translateY(-2px); }
.contact-action:active { transform: translateY(0); }

.hero-diagram {
  position: relative;
  min-height: 34rem;
  align-self: center;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(185,120,72,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(185,120,72,.08) 1px, transparent 1px),
    var(--navy-light);
  background-size: 2rem 2rem;
}
.hero-diagram::before, .hero-diagram::after {
  content: "";
  position: absolute;
  width: 10rem;
  height: 10rem;
  border: 1px solid var(--copper);
  border-radius: 50%;
}
.hero-diagram::before { inset: 12% auto auto 11%; }
.hero-diagram::after { inset: auto 8% 10% auto; width: 15rem; height: 15rem; opacity: .45; }
.diagram-rule { position: absolute; inset: 50% 8%; height: 1px; background: var(--copper); transform: rotate(-27deg); transform-origin: center; }
.diagram-node {
  position: absolute;
  z-index: 1;
  width: 5.8rem;
  aspect-ratio: 1;
  display: grid;
  place-content: center;
  border: 1px solid var(--copper);
  background: var(--navy);
  text-align: center;
}
.diagram-node b { color: var(--copper-light); font: .7rem/1 var(--font-mono); }
.diagram-node span { font: 700 .84rem/1.4 var(--font-body); }
.node-a { left: 10%; bottom: 14%; }
.node-b { left: 42%; top: 38%; }
.node-c { right: 8%; top: 10%; }
.hero-diagram > p { position: absolute; right: 1.25rem; bottom: 1rem; color: var(--steel); font: .7rem/1.8 var(--font-mono); text-align: right; }

.statement {
  display: grid;
  grid-template-columns: .5fr 1.5fr;
  gap: var(--space-5);
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--line);
}
.statement > p:last-child { max-width: 26ch; margin: 0; font: 700 clamp(2rem, 4.5vw, 4.8rem)/1.05 var(--font-condensed); letter-spacing: -.025em; }
.section-shell { padding-block: var(--space-6); border-bottom: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: .5fr 1.5fr; gap: var(--space-5); margin-bottom: var(--space-5); }
.section-heading h2 { max-width: 15ch; }
.scope-list { border-top: 1px solid var(--line); }
.scope-list article {
  display: grid;
  grid-template-columns: .18fr 1.2fr .35fr;
  gap: var(--space-4);
  align-items: start;
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--line);
  transition: background .2s ease, padding-inline .2s ease;
}
.scope-list article:hover { padding-inline: 1rem; background: rgba(185,120,72,.06); }
.scope-number, .scope-tag { color: var(--copper-light); font: .72rem/1.4 var(--font-mono); }
.scope-list h3 { margin-bottom: .7rem; }
.scope-list article div p { max-width: 62ch; margin-bottom: 0; color: var(--steel); }
.scope-tag { text-align: right; }

.method { display: grid; grid-template-columns: .75fr 1.25fr; gap: var(--space-6); }
.method-copy p:last-child { max-width: 52ch; color: var(--steel); }
.method-rail { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.method-rail li { min-height: 8rem; display: grid; grid-template-columns: .2fr .7fr 1fr; align-items: center; gap: 1rem; border-bottom: 1px solid var(--line); }
.method-rail span { color: var(--copper-light); font: .72rem/1 var(--font-mono); }
.method-rail strong { font-family: var(--font-condensed); font-size: 1.4rem; }
.method-rail small { color: var(--steel); }

.contact {
  margin-inline: calc(clamp(1rem, 3vw, 3.5rem) * -1);
  padding: var(--space-6) clamp(1rem, 3vw, 3.5rem);
  display: grid;
  grid-template-columns: .35fr .9fr 1fr;
  gap: var(--space-5);
  align-items: end;
  background: var(--paper);
  color: var(--navy);
}
.contact h2 { max-width: 9ch; }
.contact div > p:last-child { max-width: 46ch; color: #4e5960; }
.contact .eyebrow, .contact .section-code { color: #85512f; }
.contact-email {
  display: block;
  padding-block: 1rem;
  border-top: 2px solid var(--navy);
  border-bottom: 2px solid var(--navy);
  font: 700 clamp(.82rem, 1.4vw, 1rem)/1.4 var(--font-mono);
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: color .18s ease, padding-left .18s ease;
}
.contact-email:hover { padding-left: .7rem; color: #85512f; }
.site-footer { min-height: 6rem; display: flex; justify-content: space-between; align-items: center; gap: var(--space-3); color: var(--steel); font: .68rem/1.4 var(--font-mono); text-transform: uppercase; }

@keyframes hero-in { from { opacity: 0; transform: translateY(2rem); } to { opacity: 1; transform: none; } }

@media (max-width: 980px) {
  .site-header { align-items: flex-start; padding-block: 1.25rem; }
  .site-nav { flex-wrap: wrap; justify-content: flex-end; }
  .hero { grid-template-columns: 3rem 1fr; }
  .hero-diagram { grid-column: 2; width: 100%; margin-bottom: var(--space-5); }
  .method { grid-template-columns: 1fr; }
  .contact { grid-template-columns: .35fr 1.65fr; }
  .contact-email { grid-column: 2; }
}

@media (max-width: 720px) {
  .site-frame { padding-inline: 1rem; }
  .site-header { display: block; }
  .site-nav { margin-top: 1rem; justify-content: flex-start; gap: .9rem; }
  .site-nav a { font-size: .68rem; }
  .hero { min-height: auto; grid-template-columns: 1fr; }
  .hero-index { display: none; }
  .hero-copy { padding-right: 0; }
  .hero-diagram { grid-column: auto; min-height: 25rem; }
  .statement, .section-heading, .contact { grid-template-columns: 1fr; gap: var(--space-3); }
  .scope-list article { grid-template-columns: 3rem 1fr; gap: 1rem; }
  .scope-tag { grid-column: 2; text-align: left; }
  .method-rail li { grid-template-columns: 3rem 1fr; padding-block: 1.5rem; }
  .method-rail small { grid-column: 2; }
  .contact-email { grid-column: auto; }
  .site-footer { padding-block: 1.4rem; align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}