:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: #121e33;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #7dd3fc;
  --border: #25334c;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: radial-gradient(
    ellipse at top right, #172554, var(--bg) 55%);
  color: var(--text);
  font: 16px/1.7 system-ui, -apple-system, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: #fff; }
.nav {
  max-width: 1100px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px;
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 750; letter-spacing: 2px; }
nav { display: flex; gap: 24px; }
.container {
  width: min(100% - 48px, 1000px);
  margin: auto;
}
.hero { padding: 85px 0 48px; }
.eyebrow, .tag {
  color: var(--accent);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 2px;
}
h1 {
  font-size: clamp(42px, 8vw, 78px);
  letter-spacing: -3px;
  line-height: 1.08;
  margin: 22px 0;
}
h2 { line-height: 1.3; }
p { color: var(--muted); max-width: 650px; }
.hero p { font-size: 19px; }
.button {
  display: inline-block;
  background: #7dd3fc;
  color: #0b1020;
  padding: 12px 23px;
  border-radius: 8px;
  font-weight: 650;
  margin-top: 15px;
}
.button:hover { background: #bae6fd; color: #0b1020; }
.diagram {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #101b30;
}
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding: 34px 0 64px;
}
article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
}
.prose { padding: 55px 0; min-height: 65vh; }
.prose h1 { font-size: clamp(32px, 5vw, 54px); }
footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
}
@media (max-width: 600px) {
  .cards { grid-template-columns: 1fr; }
  .hero { padding-top: 45px; }
  .nav { padding: 18px; }
  .brand { font-size: 12px; }
  nav { gap: 12px; font-size: 13px; }
}