:root {
  color-scheme: light;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
  background: #f7f8fa;
  color: #172033;
  font-synthesis: none;
  line-height: 1.6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

main {
  margin: 0 auto;
  max-width: 760px;
  padding: 48px 24px 72px;
}

header {
  border-bottom: 1px solid #e1e6ee;
  margin-bottom: 32px;
  padding-bottom: 24px;
}

.brand {
  align-items: center;
  color: #2f5bea;
  display: inline-flex;
  gap: 8px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand-mark {
  font-size: 1.05rem;
  letter-spacing: normal;
  text-transform: none;
}

.brand-name {
  letter-spacing: 0.08em;
}

h1,
h2 {
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 6vw, 3.2rem);
  letter-spacing: -0.04em;
  margin: 18px 0 10px;
}

h2 {
  font-size: 1.35rem;
  margin: 36px 0 10px;
}

p,
ul {
  margin: 0 0 16px;
}

ul {
  padding-left: 24px;
}

a {
  color: #2446bb;
}

.lede {
  color: #596579;
  font-size: 1.08rem;
  margin-bottom: 0;
}

.meta {
  color: #596579;
  font-size: 0.92rem;
}

.card {
  background: #fff;
  border: 1px solid #e1e6ee;
  border-radius: 16px;
  margin: 20px 0;
  padding: 20px;
}

.notice {
  background: #eef2ff;
  border: 1px solid #cbd5ff;
  border-radius: 12px;
  margin: 20px 0;
  padding: 16px 18px;
}

footer {
  border-top: 1px solid #e1e6ee;
  color: #596579;
  font-size: 0.92rem;
  margin-top: 48px;
  padding-top: 20px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 20px;
  margin-top: 18px;
}

nav a {
  font-weight: 700;
}

@media (max-width: 520px) {
  main {
    padding: 32px 18px 56px;
  }
}