:root {
  color-scheme: dark;
  --ink: #f7f8fb;
  --muted: #aeb7c9;
  --line: rgba(255, 255, 255, 0.12);
  --panel: rgba(20, 29, 48, 0.76);
  --accent: #7df7cf;
  --accent-2: #8da8ff;
  --bg: #07101f;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% -10%, rgba(76, 119, 255, 0.30), transparent 38rem),
    radial-gradient(circle at 100% 18%, rgba(69, 240, 183, 0.16), transparent 30rem),
    var(--bg);
  font: 16px/1.7 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: var(--accent); }

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(125, 247, 207, 0.42);
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(125, 247, 207, 0.21), rgba(141, 168, 255, 0.18));
  box-shadow: 0 12px 30px rgba(31, 214, 156, 0.12);
}

.mark svg { width: 23px; height: 23px; }

nav { display: flex; gap: 18px; }
nav a { color: var(--muted); font-size: 14px; text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--ink); }

main { padding: 46px 0 80px; }

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(42px, 7vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.lede {
  max-width: 690px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 19px;
}

.meta {
  display: inline-flex;
  margin-top: 26px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.035);
  font-size: 13px;
}

.document {
  margin-top: 52px;
  padding: clamp(24px, 5vw, 52px);
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--panel);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.27);
  backdrop-filter: blur(20px);
}

.document h2 {
  margin: 44px 0 12px;
  font-size: 22px;
  letter-spacing: -0.025em;
}

.document h2:first-child { margin-top: 0; }
.document p, .document li { color: #c8cfdd; }
.document strong { color: var(--ink); }
.document ul { padding-left: 22px; }

.callout {
  margin: 28px 0;
  padding: 18px 20px;
  border: 1px solid rgba(125, 247, 207, 0.25);
  border-radius: 16px;
  background: rgba(125, 247, 207, 0.06);
}

.callout p { margin: 0; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

footer p { margin: 0; }

@media (max-width: 620px) {
  header, footer { align-items: flex-start; flex-direction: column; }
  main { padding-top: 28px; }
  nav { flex-wrap: wrap; }
}