body {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 10px;
  font: 18px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  color: #444;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  font-size: 1.5rem;
}

h2 {
  font-size: 1.17rem;
}

h3 {
  font-size: 1rem;
}

h4 {
  font-size: 0.83rem;
}

h5 {
  font-size: 0.67rem;
}

h6 {
  font-size: 0.6rem;
}

header {
  display: flex;
  align-items: center;
  gap: 2rem;
}

header .coa {
  height: 75px;
}

nav {
  display: flex;
  list-style: none;
  padding: 0;
  margin-top: 2rem;
}

nav a {
  text-decoration: none;
  color: #444;
  padding-right: 1rem;
}

nav a + a {
  border-left: 1px solid #444;
  padding-left: 1rem;
}

nav a.active-nav-item {
  text-decoration: underline;
}

@media (prefers-color-scheme: dark) {
  body {
    color: #c9d1d9;
    background: #0d1117;
  }

  a:link {
    color: #58a6ff;
  }

  a:visited {
    color: #8e96f0;
  }
}