* {
  box-sizing: border-box;
}
html {
  color-scheme: light;
}
body {
  margin: 0;
  color: #183044;
  background: #f5f8fa;
  font:
    17px/1.7 system-ui,
    sans-serif;
}
header,
footer {
  max-width: 1100px;
  margin: auto;
  padding: 28px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
header {
  border-bottom: 1px solid #cfdce5;
}
.brand {
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
}
.brand span {
  display: block;
  font-weight: 400;
  letter-spacing: normal;
  font-size: 14px;
}
nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
a {
  color: #13587a;
  text-underline-offset: 4px;
}
a:focus-visible {
  outline: 3px solid #177598;
  outline-offset: 5px;
}
main {
  max-width: 850px;
  margin: 48px auto 72px;
  padding: 0 30px;
}
h1 {
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: #102d43;
  margin: 16px 0 28px;
}
h2 {
  font-size: 1.35rem;
  margin-top: 38px;
  color: #163e57;
}
.intro {
  font-size: 1.4rem;
  line-height: 1.5;
  color: #34566a;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.8rem;
  color: #356479;
}
code {
  font-size: 0.85em;
  overflow-wrap: anywhere;
}
footer {
  font-size: 0.85rem;
  border-top: 1px solid #cfdce5;
  color: #456274;
}
@media (max-width: 540px) {
  header,
  footer {
    padding: 24px;
  }
  main {
    margin-top: 36px;
    padding: 0 24px;
  }
  nav {
    gap: 16px;
  }
}