:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: #1f2937;
  background: #f8fafc;
  line-height: 1.7;
}

body {
  margin: 0;
}

main {
  width: min(880px, calc(100% - 40px));
  margin: 0 auto;
  padding: 56px 0 72px;
}

header,
section,
nav,
footer {
  margin-bottom: 32px;
}

h1,
h2 {
  line-height: 1.3;
}

h1 {
  font-size: clamp(2rem, 7vw, 3.5rem);
  margin: 8px 0 18px;
}

h2 {
  margin-top: 0;
  font-size: 1.3rem;
}

section {
  padding: 24px;
  background: #ffffff;
  border: 1px solid #dbe3ec;
  border-radius: 12px;
}

.eyebrow {
  color: #475569;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

dt {
  margin-top: 16px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

dd {
  margin: 4px 0 0;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

a {
  color: #075985;
}

code {
  font-size: 0.9em;
}