:root {
  color-scheme: dark;
  --canvas: #071013;
  --panel: #0e1a1e;
  --line: #254047;
  --ink: #edf7f4;
  --muted: #a7bbb7;
  --accent: #42d6c5;
  --warm: #f4b860;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 85% 0%, #12353a 0, transparent 30rem),
    var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}

main,
nav {
  width: min(760px, calc(100% - 40px));
  margin-inline: auto;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 24px;
}

.brand {
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

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

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--ink);
}

main {
  padding-block: 52px 80px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  max-width: 16ch;
  margin: 12px 0 18px;
  font-size: clamp(2.25rem, 7vw, 4.75rem);
  line-height: 1.03;
  letter-spacing: -0.04em;
}

h2 {
  margin-top: 42px;
  font-size: 1.35rem;
}

h3 {
  margin: 28px 0 8px;
  font-size: 1.05rem;
}

p,
li {
  color: var(--muted);
}

.lead {
  max-width: 60ch;
  font-size: 1.08rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 38px;
}

.card,
.notice {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
}

.card {
  display: block;
  padding: 22px;
  color: var(--ink);
  text-decoration: none;
}

.card span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.92rem;
}

.notice {
  margin-block: 28px;
  padding: 18px 20px;
  color: var(--muted);
}

.notice strong {
  color: var(--warm);
}

.meta {
  margin-bottom: 36px;
  color: var(--muted);
  font-size: 0.9rem;
}

ul {
  padding-left: 1.35rem;
}

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

footer a {
  white-space: nowrap;
}

@media (max-width: 620px) {
  .cards {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 12px;
    font-size: 0.9rem;
  }
}