:root {
  --bg: #05070a;
  --panel: #0b1018;
  --text: #f5f7fa;
  --muted: #a9b2c0;
  --line: rgba(255,255,255,.12);
  --blue: #2f83ff;
  --blue-soft: #8dbbff;
  --paper: #f4f6f8;
  --ink: #111722;
  --ink-muted: #4d5968;
  --max: 1220px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px max(24px, calc((100vw - var(--max))/2));
  background: rgba(5,7,10,.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: .95rem;
  letter-spacing: .02em;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(47,131,255,.75);
  border-radius: 50%;
  color: var(--blue-soft);
  font-weight: 700;
}
.site-nav { display: flex; gap: 24px; }
.site-nav a { text-decoration: none; color: var(--muted); font-size: .9rem; }
.site-nav a:hover { color: white; }
.menu-button { display: none; }
.hero {
  min-height: 760px;
  max-width: var(--max);
  margin: auto;
  padding: 96px 24px 60px;
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  align-items: center;
  gap: 48px;
}
.eyebrow {
  color: var(--blue-soft);
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: .75rem;
  font-weight: 700;
}
.hero h1, h2 {
  margin: 0 0 24px;
  line-height: 1.04;
  letter-spacing: -.04em;
}
.hero h1 { font-size: clamp(3.8rem, 7vw, 7.8rem); font-weight: 600; }
.hero h1 span { color: var(--blue); }
.hero-lede { font-size: clamp(1.2rem, 2vw, 1.7rem); color: var(--muted); max-width: 680px; }
.hero-visual img { border-radius: 10px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 34px; }
.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 650;
  font-size: .92rem;
}
.primary { background: var(--blue); color: white; }
.secondary { border: 1px solid var(--line); color: white; }
.section { padding: 110px max(24px, calc((100vw - var(--max))/2)); }
.section-light { background: var(--paper); color: var(--ink); }
.section-dark { background: var(--bg); color: var(--text); border-top: 1px solid var(--line); }
.section-heading { max-width: 820px; margin-bottom: 54px; }
.section-heading.narrow { max-width: 900px; }
h2 { font-size: clamp(2.3rem, 5vw, 4.8rem); font-weight: 550; }
h3 { line-height: 1.25; }
.definition {
  max-width: 1000px;
  border-left: 4px solid var(--blue);
  padding-left: 28px;
  font-size: clamp(1.2rem, 2vw, 1.65rem);
}
.three-step, .contrast-grid, .roadmap {
  display: grid;
  gap: 24px;
  margin-top: 70px;
}
.three-step { grid-template-columns: repeat(3, 1fr); }
.three-step article, .contrast-grid > div {
  border-top: 1px solid #cad1d9;
  padding-top: 22px;
}
.three-step span, .roadmap article > span { color: var(--blue); font-weight: 700; }
.split {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 68px;
  align-items: center;
}
.design-system { border: 1px solid var(--line); }
.plain-list { padding-left: 20px; color: var(--muted); }
.contrast-grid { grid-template-columns: 1fr 1fr; }
.contrast-grid p { font-size: 1.3rem; color: var(--ink-muted); }
.roadmap { grid-template-columns: repeat(5, 1fr); }
.roadmap article {
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--panel);
}
.roadmap small { color: var(--blue-soft); }
.publication-card {
  display: grid;
  grid-template-columns: 1.5fr .6fr;
  gap: 44px;
  padding: 36px 0;
  border-top: 1px solid #cbd2da;
  border-bottom: 1px solid #cbd2da;
}
.status { color: var(--blue); font-weight: 700; text-transform: uppercase; font-size: .78rem; letter-spacing: .12em; }
.publication-meta { color: var(--ink-muted); }
.note, .small { color: var(--ink-muted); font-size: .9rem; }
.about-card {
  border: 1px solid var(--line);
  padding: 34px;
  background: var(--panel);
}
.contact { text-align: center; }
.contact p { max-width: 720px; margin-left: auto; margin-right: auto; }
footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 32px max(24px, calc((100vw - var(--max))/2));
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: .85rem;
}
@media (max-width: 980px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 79px;
    left: 0; right: 0;
    flex-direction: column;
    padding: 24px;
    background: #070a0f;
    border-bottom: 1px solid var(--line);
  }
  .site-nav.open { display: flex; }
  .menu-button {
    display: inline-block;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: transparent;
    color: white;
    padding: 8px 14px;
  }
  .hero, .split { grid-template-columns: 1fr; }
  .hero { padding-top: 70px; }
  .three-step, .roadmap { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .hero { min-height: auto; }
  .hero h1 { font-size: 3.3rem; }
  .section { padding-top: 76px; padding-bottom: 76px; }
  .three-step, .contrast-grid, .roadmap, .publication-card { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
  .brand span:last-child { display: none; }
}