:root {
  --ink: #14211f;
  --muted: #55645f;
  --paper: #f7f5ef;
  --surface: #ffffff;
  --tint: #ecebe2;
  --line: #d9d7ca;
  --brand: #0f3d3e;
  --brand-ink: #f7f5ef;
  --accent: #d9622b;
  --accent-text: #b4481a;
  --on-accent: #ffffff;
  --dark: #0f2b2c;
  --dark-ink: #eef0ea;
  --dark-muted: #a9bab4;
  --dark-line: #2b4b4b;
  --dark-link: #f4a97f;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8ece7;
    --muted: #a5b3ad;
    --paper: #101a19;
    --surface: #182423;
    --tint: #141f1e;
    --line: #2c3b39;
    --brand: #7fc4bd;
    --brand-ink: #0e1a19;
    --accent: #e97b45;
    --accent-text: #f2986a;
    --on-accent: #1b0d05;
    --dark: #0b1413;
    --dark-line: #263534;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

h1, h2, h3 { margin: 0; line-height: 1.2; letter-spacing: -0.015em; font-weight: 700; }
h1 { font-size: clamp(2.3rem, 5.6vw, 3.9rem); text-wrap: balance; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.5rem); text-wrap: balance; }
h3 { font-size: 1.1rem; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; }
svg { display: block; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(1120px, 100%); margin-inline: auto; padding-inline: 24px; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 14px; z-index: 20; }
.skip:focus { left: 12px; }

.top {
  position: sticky; top: 0; z-index: 10;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.top-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; letter-spacing: 0.04em; }
.brand-mark { width: 28px; height: 28px; fill: none; stroke: var(--brand); stroke-width: 2.4; stroke-linejoin: round; }
.brand-mark circle { fill: var(--accent); stroke: none; }
.nav { display: flex; align-items: center; gap: 4px 22px; flex-wrap: wrap; font-size: 0.95rem; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--ink); }
.nav .nav-cta { color: var(--accent-text); font-weight: 600; }

.eyebrow { color: var(--accent-text); font-size: 0.82rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 14px; }
.lead { color: var(--muted); font-size: 1.14rem; margin-top: 18px; max-width: 58ch; }

.hero { padding: clamp(48px, 9vw, 104px) 0; }
.hero-grid { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 56px; align-items: center; }
.lattice { width: 100%; max-width: 380px; justify-self: end; }
.bonds path { fill: none; stroke: var(--line); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.bonds path:first-child { stroke: var(--brand); }
.nodes circle { fill: var(--brand); }
.core { fill: var(--accent); }
.core-label { fill: var(--brand); font-size: 62px; font-weight: 700; letter-spacing: -0.02em; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn { display: inline-block; padding: 12px 22px; border-radius: var(--radius); text-decoration: none; font-weight: 600; border: 1.5px solid transparent; transition: background-color 0.15s, border-color 0.15s; }
.btn-primary { background: var(--brand); color: var(--brand-ink); }
.btn-primary:hover { background: var(--accent); color: var(--on-accent); }
.btn-ghost { border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }

.section { padding: clamp(56px, 8vw, 92px) 0; border-top: 1px solid var(--line); }
.section-tint { background: var(--tint); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.prose p + p { margin-top: 16px; }
.prose { color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 34px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card p { color: var(--muted); font-size: 0.97rem; margin-top: 10px; }

.product { display: grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items: center; }
.product .btn { margin-top: 26px; }
.ticks li { padding: 16px 0 16px 30px; border-top: 1px solid var(--line); position: relative; }
.ticks li:last-child { border-bottom: 1px solid var(--line); }
.ticks li::before { content: ""; position: absolute; left: 4px; top: 25px; width: 10px; height: 10px; background: var(--accent); transform: rotate(45deg); }

.section-dark { background: var(--dark); color: var(--dark-ink); border-top: 0; }
.section-dark .eyebrow { color: var(--dark-link); }
.section-dark .lead { color: var(--dark-muted); }
.contact { margin: 0; display: grid; grid-template-columns: 124px 1fr; }
.contact dt, .contact dd { margin: 0; padding: 14px 0; border-top: 1px solid var(--dark-line); }
.contact dt { color: var(--dark-muted); font-size: 0.92rem; }
.contact dd span { color: var(--dark-muted); font-size: 0.92rem; }
.contact a { color: var(--dark-link); overflow-wrap: anywhere; }

.foot { background: var(--dark); color: var(--dark-muted); font-size: 0.9rem; border-top: 1px solid var(--dark-line); }
.foot-row { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-block: 20px; }

@media (max-width: 860px) {
  .hero-grid, .split, .product { grid-template-columns: 1fr; gap: 32px; }
  .lattice { display: none; }
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .wrap { padding-inline: 16px; }
  .grid { grid-template-columns: 1fr; }
  .top-row { padding-block: 10px; }
  .contact { grid-template-columns: 1fr; }
  .contact dt { padding-bottom: 0; }
  .contact dd { border-top: 0; padding-top: 2px; }
}