:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0d1117;
  color: #f5f7fb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 0%, rgba(94, 234, 212, .12), transparent 34rem),
    radial-gradient(circle at 90% 8%, rgba(167, 139, 250, .12), transparent 30rem),
    #0d1117;
}

main {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 72px 0 96px;
}

.brand {
  color: #94a3b8;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1 {
  margin: 14px 0 12px;
  font-size: clamp(36px, 7vw, 58px);
  line-height: 1.04;
  letter-spacing: -.04em;
}

.lead {
  max-width: 650px;
  color: #cbd5e1;
  font-size: 18px;
  line-height: 1.65;
}

.updated {
  margin: 22px 0 42px;
  color: #94a3b8;
  font-size: 14px;
}

section {
  margin-top: 18px;
  padding: 24px;
  border: 1px solid #2b3645;
  border-radius: 20px;
  background: rgba(22, 28, 37, .82);
  box-shadow: 0 18px 70px rgba(0, 0, 0, .18);
}

h2 {
  margin: 0 0 10px;
  font-size: 19px;
}

p, li {
  color: #b9c3d2;
  font-size: 15px;
  line-height: 1.7;
}

ul { padding-left: 20px; }

a {
  color: #5eead4;
  font-weight: 700;
  text-underline-offset: 3px;
}

.mind a { color: #ffb79d; }

.button {
  display: inline-flex;
  margin-top: 12px;
  padding: 13px 18px;
  border-radius: 13px;
  background: #5eead4;
  color: #0d1117;
  text-decoration: none;
}

.mind .button { background: #ffb79d; }

footer {
  padding-top: 36px;
  color: #64748b;
  font-size: 13px;
  text-align: center;
}

@media (max-width: 520px) {
  main { padding-top: 44px; }
  section { padding: 20px; border-radius: 17px; }
}