:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #eaf0f7;
  background: #0a1018;
  line-height: 1.6;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 12% 10%, rgba(65, 145, 255, 0.18), transparent 34rem),
    linear-gradient(155deg, #0a1018 0%, #101b2a 55%, #0a1018 100%);
}

a {
  color: #a9d2ff;
  text-underline-offset: 0.2em;
}

.site-header,
main,
footer {
  width: min(68rem, calc(100% - 2.5rem));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.5rem;
}

.site-header nav {
  display: flex;
  gap: 1.25rem;
}

.brand {
  color: #ffffff;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.hero {
  max-width: 48rem;
  padding-block: clamp(4rem, 12vw, 8rem);
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: #74b6ff;
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1.2rem;
  font-size: clamp(2.7rem, 8vw, 5.5rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.lead {
  max-width: 38rem;
  color: #b7c5d6;
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding-bottom: 5rem;
}

.cards article {
  padding: 1.4rem;
  border: 1px solid rgba(169, 210, 255, 0.15);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.035);
}

.cards h2 {
  font-size: 1.05rem;
}

.cards p,
.reading p,
footer {
  color: #aab7c7;
}

.reading {
  max-width: 48rem;
  padding-block: clamp(4rem, 12vw, 8rem);
}

.reading h1 {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
}

footer {
  padding-block: 2rem;
  border-top: 1px solid rgba(169, 210, 255, 0.12);
  font-size: 0.88rem;
}

@media (max-width: 720px) {
  .cards {
    grid-template-columns: 1fr;
  }
}