* {
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-size: 21px;
  line-height: 32px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin-block-end: 0.4rem;
}

h1 {
  font-size: 2rem;
  line-height: 2.5rem;
}

h2 {
  font-size: 1.6rem;
  line-height: 2rem;
}

h3 {
  font-size: 1.4rem;
  line-height: 1.75rem;
}

h2 {
  font-size: 1.2rem;
  line-height: 1.5rem;
}

h5, h6 {
  font-size: 1.1rem;
  line-height: 1.4rem;
}

body {
  background-color: white;
  margin: 0;
  padding: 0;
}

main {
  max-width: 680px;
  margin-right: auto;
  margin-left: auto;
  margin-top: 2rem;
}

img {
  max-width: 680px;
}

.image-centered {
  display: block;
  margin-right: auto;
  margin-left: auto;
}

code {
  font-family: 'Courier New', Courier, monospace;
}

pre {
  background-color: rgb(230, 230, 230);
  padding: 0.5rem 1rem;
}

header {
  box-shadow: 0 4px 9px -4px lightgray;
  display: flex;
  justify-content: center;
}

nav {
  flex-grow: 1;
  max-width: 1192px;
  padding: 0 0.3rem;
}

.navbar {
  display: flex;
  justify-content: space-between;
}

nav ul {
  display: flex;
  margin: 0;
  padding: 0;
}

nav li {
  display: block;
}

a {
  font-family: inherit;
  font-size: inherit;
}

h1 a, h2 a {
  color: inherit;
  text-decoration: none;
}

nav a {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 3rem;
  text-decoration: none;
  padding: 0 0.3rem;
}

a.brand {
  font-size: 1.3rem;
  font-weight: bolder;
  color: black;
}

article {
  margin-bottom: 2rem;
  margin-top: 2rem;
  border-bottom: 1px solid lightgray;
  padding-bottom: 1rem;
}

article:last-of-type {
  border-bottom: none;
}