:root {
  color-scheme: light;
  font-family: Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background: #f3f7fb;
  color: #14213d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
}

main {
  width: min(100%, 720px);
  margin: 0 auto;
  background: #ffffff;
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.12);
}

.hero,
.explanation {
  padding: 56px 24px;
}

.hero {
  min-height: 75vh;
  display: grid;
  align-content: center;
  background:
    radial-gradient(circle at 85% 15%, rgba(34, 211, 238, 0.2), transparent 34%),
    linear-gradient(145deg, #071a2f 0%, #123a59 100%);
  color: #f8fafc;
}

.eyebrow {
  margin: 0 0 12px;
  color: #67e8f9;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 12em;
  margin-bottom: 20px;
  font-size: clamp(2.3rem, 11vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

h2 {
  font-size: 1.8rem;
}

.lead,
li {
  font-size: 1rem;
  line-height: 1.85;
}

.lead {
  max-width: 34em;
  color: #cbd5e1;
}

.cta {
  display: inline-flex;
  min-height: 56px;
  margin-top: 26px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #22d3ee;
  padding: 0 28px;
  color: #082f49;
  font-size: 1rem;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 12px 32px rgba(34, 211, 238, 0.24);
}

.cta:focus-visible {
  outline: 4px solid rgba(103, 232, 249, 0.45);
  outline-offset: 4px;
}

.explanation {
  border-top: 8px solid #22d3ee;
}

.explanation ul {
  padding-left: 1.35em;
}

.secondary {
  background: #0f3150;
  color: #ffffff;
  box-shadow: none;
}

footer {
  padding: 24px;
  background: #e2e8f0;
  color: #475569;
  text-align: center;
  font-size: 0.85rem;
}

@media (min-width: 640px) {
  .hero,
  .explanation {
    padding: 80px 64px;
  }
}