:root {
  color-scheme: light;
  --ink: #122033;
  --muted: #526174;
  --paper: #f7f9fc;
  --surface: #ffffff;
  --line: #dce3ec;
  --accent: #2d63b8;
  --accent-soft: #eaf1fb;
  --warm: #e16b4a;
  --shadow: 0 18px 48px rgba(18, 32, 51, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 88% 4%, rgba(45, 99, 184, 0.11), transparent 30rem),
    linear-gradient(180deg, #fbfcfe 0%, var(--paper) 100%);
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

a:hover {
  color: #1d4f98;
}

.shell {
  width: min(100% - 2rem, 68rem);
  margin: 0 auto;
}

header {
  border-bottom: 1px solid rgba(220, 227, 236, 0.88);
  background: rgba(255, 255, 255, 0.86);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: 0.65rem;
  color: white;
  background: var(--accent);
  box-shadow: inset 0 -0.22rem 0 rgba(0, 0, 0, 0.11);
}

.brand-mark::after {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: #fff;
  content: "";
}

nav ul {
  display: flex;
  gap: 1.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
}

nav a[aria-current="page"] {
  color: var(--accent);
}

main {
  padding: clamp(3.5rem, 8vw, 7rem) 0 5rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 1.6rem;
  height: 0.2rem;
  border-radius: 999px;
  background: var(--warm);
  content: "";
}

h1,
h2 {
  margin: 0;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 13ch;
  font-size: clamp(2.55rem, 8vw, 5.25rem);
}

h2 {
  margin-top: 2.4rem;
  font-size: clamp(1.45rem, 3vw, 2rem);
}

.lede {
  max-width: 44rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.notice {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  max-width: 48rem;
  margin-top: 2.5rem;
  padding: 1.25rem;
  border: 1px solid #cddcf2;
  border-radius: 1rem;
  background: var(--accent-soft);
}

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

.dot {
  width: 0.75rem;
  height: 0.75rem;
  margin-top: 0.45rem;
  border-radius: 50%;
  background: var(--warm);
}

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

.card {
  min-height: 11rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 1.15rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.card h2 {
  margin-top: 0;
  font-size: 1.25rem;
}

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

.card a {
  font-weight: 700;
}

.content {
  max-width: 48rem;
}

.content h1 {
  max-width: 18ch;
  font-size: clamp(2.4rem, 6vw, 4rem);
}

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

.meta {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.92rem;
}

footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

@media (max-width: 720px) {
  .nav,
  .footer-row {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem 0;
  }

  nav ul {
    gap: 1rem;
    flex-wrap: wrap;
  }

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

  main {
    padding-top: 3.25rem;
  }
}