:root {
  --bg: #fff;
  --surface: #f7f7f5;
  --ink: #151515;
  --secondary: #606060;
  --line: #dededb;
  --focus: #005fcc;
  --signal: #d9ff43;
  --max: 1160px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section: clamp(5rem, 11vw, 9rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-underline-offset: .22em; }
button { color: inherit; font: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
::selection { background: var(--ink); color: var(--bg); }
.container { width: min(calc(100% - (var(--gutter) * 2)), var(--max)); margin-inline: auto; }
.skip-link {
  position: fixed; z-index: 100; top: .75rem; left: .75rem; padding: .7rem 1rem;
  background: var(--ink); color: var(--bg); transform: translateY(-160%);
}
.skip-link:focus { transform: none; }

.site-header {
  position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 94%, transparent);
  backdrop-filter: blur(12px); border-bottom: 1px solid var(--line);
}
.nav-shell { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { display: flex; align-items: baseline; gap: .75rem; font-weight: 740; letter-spacing: -.03em; text-decoration: none; }
.brand small { color: var(--secondary); font-size: .68rem; font-weight: 650; letter-spacing: .05em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 1.3rem; }
.nav-links a { color: var(--secondary); font-size: .84rem; text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
.menu-button { display: none; min-width: 44px; min-height: 44px; padding: 0; border: 0; background: transparent; cursor: pointer; }

.hero { min-height: calc(100svh - 72px); display: grid; align-items: end; padding-block: clamp(5rem, 10vw, 8rem); border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.65fr .75fr; align-items: end; gap: clamp(3rem, 8vw, 7rem); }
.eyebrow, .section-index, .scan-label {
  margin: 0 0 1.5rem; color: var(--secondary); font-size: .78rem; font-weight: 700;
  letter-spacing: .13em; text-transform: uppercase;
}
h1, h2, h3, p { text-wrap: pretty; }
h1 { margin: 0; font-size: clamp(4rem, 10.5vw, 8.6rem); font-weight: 640; letter-spacing: -.075em; line-height: .86; }
.hero-intro { max-width: 670px; margin: clamp(2.25rem, 5vw, 4rem) 0 0; color: var(--secondary); font-size: clamp(1.15rem, 2vw, 1.45rem); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.2rem; margin-top: 2rem; }
.button {
  min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: .8rem 1.1rem;
  border: 1px solid var(--ink); border-radius: 7px; background: var(--ink); color: var(--bg);
  font-size: .9rem; font-weight: 680; text-decoration: none; transition: transform .18s ease;
}
.button:hover { transform: translateY(-2px); }
.button.secondary { background: var(--bg); color: var(--ink); }
.text-link { font-weight: 650; text-decoration: none; }
.text-link:hover { text-decoration: underline; }

.scan-card { padding: clamp(1.5rem, 4vw, 2.5rem); background: var(--ink); color: var(--bg); }
.scan-card .scan-label { display: block; color: #b9b9b9; }
.scan-frame { position: relative; aspect-ratio: 1; display: grid; place-items: center; max-width: 250px; margin: 2rem auto; }
.scan-frame span { position: absolute; width: 31%; height: 31%; border-color: var(--signal); border-style: solid; }
.scan-frame span:nth-child(1) { inset: 0 auto auto 0; border-width: 5px 0 0 5px; }
.scan-frame span:nth-child(2) { inset: 0 0 auto auto; border-width: 5px 5px 0 0; }
.scan-frame span:nth-child(3) { inset: auto auto 0 0; border-width: 0 0 5px 5px; }
.scan-frame span:nth-child(4) { inset: auto 0 0 auto; border-width: 0 5px 5px 0; }
.scan-frame b { font-size: clamp(4rem, 8vw, 6.5rem); font-weight: 500; }
.scan-card p { margin: 0; color: #d0d0d0; }
.scan-card strong { color: var(--signal); }

.section { padding-block: var(--section); border-bottom: 1px solid var(--line); }
.surface { background: var(--surface); }
.split-heading { display: grid; grid-template-columns: .55fr 1.7fr; gap: clamp(2rem, 7vw, 6rem); }
.section-index { margin-top: .35rem; }
h2 { max-width: 850px; margin: 0; font-size: clamp(2.7rem, 6vw, 5.4rem); font-weight: 620; letter-spacing: -.065em; line-height: .94; }
.lead { max-width: 710px; margin: 2rem 0 0; color: var(--secondary); font-size: clamp(1.08rem, 1.8vw, 1.3rem); }
.check-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin: clamp(4rem, 8vw, 6rem) 0 0; padding: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); list-style: none; }
.check-grid li { min-height: 270px; display: flex; flex-direction: column; padding: clamp(1.5rem, 3vw, 2.5rem); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.check-grid span { color: var(--secondary); font-size: .78rem; }
.check-grid h3 { margin: auto 0 .8rem; font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 620; letter-spacing: -.05em; line-height: 1; }
.check-grid p { margin: 0; color: var(--secondary); }

.cta { padding-block: clamp(5.5rem, 13vw, 10rem); }
.cta h2 { max-width: 950px; font-size: clamp(3.5rem, 8.5vw, 7.2rem); line-height: .88; }
.cta > .container > p:not(.eyebrow) { max-width: 630px; margin: 2rem 0; color: var(--secondary); font-size: 1.12rem; }
.site-footer { padding-block: 2.75rem; border-top: 1px solid var(--line); }
.footer-row { display: flex; justify-content: space-between; gap: 2rem; }
.footer-row p { margin: .4rem 0 0; color: var(--secondary); font-size: .82rem; }
.footer-meta { display: flex; flex-wrap: wrap; align-items: start; justify-content: flex-end; gap: 1.2rem; color: var(--secondary); font-size: .8rem; }

@media (max-width: 900px) {
  .brand small { display: none; }
  .nav-enhanced .menu-button { display: block; }
  .nav-enhanced .nav-links { position: fixed; inset: 72px 0 auto; display: none; padding: 1rem var(--gutter) 2rem; background: var(--bg); border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; }
  .nav-enhanced .nav-links.open { display: flex; }
  .nav-links a { min-height: 48px; display: flex; align-items: center; font-size: 1rem; }
  .hero-grid { grid-template-columns: 1fr; }
  .scan-card { max-width: 460px; }
}
@media (max-width: 700px) {
  .split-heading, .check-grid { grid-template-columns: 1fr; }
  .check-grid { border-left: 0; }
  .check-grid li { min-height: 220px; border-left: 1px solid var(--line); }
  .footer-row { flex-direction: column; }
  .footer-meta { justify-content: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}
@media (prefers-contrast: more) {
  :root { --line: #777; --secondary: #333; }
}