:root {
  color-scheme: dark;
  --background: #031723;
  --surface: #08283a;
  --surface-soft: #0c3349;
  --border: #17648b;
  --text: #f3f8fc;
  --muted: #a8becc;
  --accent: #1d98ff;
  --teal: #18d4c0;
  --warning: #ffc43d;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 82% 0%, rgba(26, 130, 255, 0.2), transparent 34rem),
    var(--background);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: #66baff;
}

a:hover,
a:focus-visible {
  color: #9bd2ff;
}

.site-header {
  border-bottom: 1px solid rgba(71, 163, 213, 0.28);
  background: rgba(3, 23, 35, 0.92);
  backdrop-filter: blur(14px);
}

.nav,
main,
.footer-inner {
  width: min(100% - 2rem, 940px);
  margin-inline: auto;
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--accent);
  border-radius: 13px;
  color: var(--teal);
  background: #07304a;
  font-size: 1.35rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.25rem 1rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.93rem;
}

main {
  padding-block: 3.5rem 5rem;
}

.hero {
  padding: clamp(1.5rem, 5vw, 3.2rem);
  border: 1px solid var(--border);
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(12, 51, 73, 0.95), rgba(4, 28, 42, 0.96));
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.2;
  letter-spacing: -0.03em;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.6rem);
}

h2 {
  margin: 2.4rem 0 0.7rem;
  font-size: clamp(1.25rem, 4vw, 1.65rem);
}

.lead {
  max-width: 720px;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.updated,
.muted,
small {
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.card,
.notice {
  border: 1px solid rgba(45, 132, 178, 0.7);
  border-radius: 18px;
  background: rgba(8, 40, 58, 0.82);
}

.card {
  display: block;
  min-height: 180px;
  padding: 1.35rem;
  color: var(--text);
  text-decoration: none;
}

.card strong {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}

.card span {
  color: var(--muted);
}

.notice {
  margin-top: 1.5rem;
  padding: 1rem 1.15rem;
}

.notice.warning {
  border-color: rgba(255, 196, 61, 0.72);
  color: #ffe39a;
}

.content {
  max-width: 780px;
}

.content p,
.content li {
  color: #d4e1e9;
}

.content ul,
.content ol {
  padding-left: 1.35rem;
}

.footer {
  border-top: 1px solid rgba(71, 163, 213, 0.25);
}

.footer-inner {
  padding-block: 1.5rem 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .nav {
    align-items: flex-start;
    padding-block: 0.9rem;
  }

  .nav-links {
    max-width: 12rem;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: 0;
  }
}