:root {
  --paper: #f4f2eb;
  --paper-light: #fffdf7;
  --ink: #0d1117;
  --body: #374151;
  --quiet: #6b7280;
  --line: #c9c9c3;
  --signal: #f97316;
  --signal-dark: #c94e08;
  --lime: #c7f36b;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "DM Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--signal); outline-offset: 4px; }
.system-label,
nav,
.process-list span {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.site-header {
  min-height: 68px;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  border-bottom: 1px solid var(--ink);
}
.identity { font-size: 1rem; font-weight: 750; letter-spacing: -.025em; }
.identity span { color: var(--signal-dark); }
nav { display: flex; align-items: center; gap: clamp(16px, 3vw, 38px); }
nav a { min-height: 44px; display: inline-flex; align-items: center; border-bottom: 2px solid transparent; }
nav a:hover { border-color: var(--signal); }

.hero,
.statement,
.section,
.contact-section,
footer {
  padding-left: max(24px, calc((100vw - var(--max)) / 2));
  padding-right: max(24px, calc((100vw - var(--max)) / 2));
}

.hero {
  min-height: min(760px, calc(100svh - 68px));
  padding-top: clamp(72px, 11vh, 120px);
  padding-bottom: clamp(64px, 9vh, 100px);
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, .65fr);
  gap: clamp(48px, 8vw, 120px);
  align-items: end;
  background: var(--paper);
}
.hero-copy { align-self: center; }
.hero .system-label { color: var(--signal-dark); margin: 0 0 28px; }
h1 { max-width: 900px; margin: 0; font-size: clamp(3.6rem, 7.2vw, 6rem); line-height: .96; letter-spacing: -.04em; text-wrap: balance; }
.hero-brief { padding-top: 28px; border-top: 3px solid var(--signal); }
.hero-brief p { margin: 0 0 32px; font-size: clamp(1.05rem, 1.6vw, 1.3rem); line-height: 1.45; }
.primary-action { min-height: 48px; padding: 0 18px; display: inline-flex; align-items: center; justify-content: center; background: var(--signal); border: 1px solid var(--signal); color: var(--ink); font-weight: 700; transition: background-color 160ms ease-out, color 160ms ease-out; }
.primary-action:hover { background: var(--ink); border-color: var(--ink); color: var(--paper-light); }

.statement { padding-top: 52px; padding-bottom: 52px; display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 8vw, 120px); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); background: var(--paper-light); }
.statement p { margin: 0; max-width: 60ch; }
.statement p:first-child { font-size: clamp(1.7rem, 3vw, 2.6rem); line-height: 1.1; letter-spacing: -.03em; font-weight: 650; }

.section { padding-top: 96px; padding-bottom: 96px; }
.section-header { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; margin-bottom: 64px; }
h2 { margin: 0; max-width: 780px; font-size: clamp(2.4rem, 4.6vw, 4.5rem); line-height: 1; letter-spacing: -.04em; text-wrap: balance; }
.section-header > p { max-width: 52ch; margin: 8px 0 0; color: var(--body); }

.service-list { border-top: 1px solid var(--ink); }
.service-list article { padding: 30px 0; display: grid; grid-template-columns: minmax(220px, .85fr) 1.4fr; gap: 48px; border-bottom: 1px solid var(--line); }
.service-list h3 { margin: 0; font-size: clamp(1.35rem, 2.4vw, 2rem); line-height: 1.1; letter-spacing: -.025em; }
.service-list p { margin: 0; max-width: 66ch; color: var(--body); }

.concept-section { background: var(--paper-light); border-top: 1px solid var(--ink); }
.concept-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.concept-grid article { min-height: 270px; padding: 26px; display: flex; flex-direction: column; border-right: 1px solid var(--ink); }
.concept-grid article:last-child { border-right: 0; }
.concept-grid .system-label { margin: 0; color: var(--signal-dark); }
.concept-grid h3 { margin: auto 0 16px; font-size: clamp(1.45rem, 2.4vw, 2.1rem); line-height: 1.05; letter-spacing: -.025em; }
.concept-grid article > p:last-child { margin: 0; color: var(--body); }

.dark-section { background: var(--ink); color: var(--paper-light); }
.dark-section .section-header > p { color: #c7cbd1; }
.process-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid #4a515a; }
.process-list li { min-height: 116px; padding: 24px 0; display: grid; grid-template-columns: 70px .7fr 1.3fr; gap: 30px; align-items: center; border-bottom: 1px solid #4a515a; }
.process-list span { color: var(--lime); }
.process-list h3 { margin: 0; font-size: clamp(1.5rem, 2.8vw, 2.4rem); letter-spacing: -.025em; }
.process-list p { margin: 0; max-width: 62ch; color: #d8dbe0; }

.contact-section { padding-top: 76px; padding-bottom: 76px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; background: var(--signal); }
.contact-section div { align-self: end; }
.contact-section p { margin: 0 0 20px; max-width: 48ch; }
.primary-action.light { background: var(--paper-light); border-color: var(--ink); }
.primary-action.light:hover { background: var(--ink); color: var(--paper-light); }

footer { min-height: 100px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-top: 1px solid var(--ink); }
footer > a:last-child { min-height: 44px; display: inline-flex; align-items: center; text-decoration: underline; text-underline-offset: 4px; }

.error-page { background: var(--paper); }
.error-shell { min-height: 100svh; max-width: 820px; margin: auto; padding: 10vh 24px; display: flex; flex-direction: column; justify-content: center; }
.error-shell h1 { margin: 18px 0 36px; font-size: clamp(2.8rem, 7vw, 5.5rem); }
.text-link { min-height: 44px; display: inline-flex; align-items: center; text-decoration: underline; text-underline-offset: 5px; }

@media (max-width: 780px) {
  .site-header { align-items: flex-start; flex-direction: column; padding-top: 14px; padding-bottom: 10px; gap: 4px; }
  nav { width: 100%; overflow-x: auto; gap: 22px; }
  .hero { min-height: auto; grid-template-columns: 1fr; align-items: start; }
  .hero-copy { align-self: auto; }
  h1 { font-size: clamp(3.2rem, 14vw, 5.2rem); }
  .statement, .section-header, .contact-section { grid-template-columns: 1fr; }
  .section { padding-top: 72px; padding-bottom: 72px; }
  .section-header { margin-bottom: 44px; }
  .service-list article { grid-template-columns: 1fr; gap: 14px; }
  .concept-grid { grid-template-columns: 1fr; }
  .concept-grid article { min-height: 230px; border-right: 0; border-bottom: 1px solid var(--ink); }
  .concept-grid article:last-child { border-bottom: 0; }
  .process-list li { grid-template-columns: 46px 1fr; gap: 14px 18px; }
  .process-list p { grid-column: 2; }
  footer { align-items: flex-start; flex-direction: column; padding-top: 28px; padding-bottom: 28px; }
}

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