body {
  font-family: monospace;
  max-width: 1100px;
  margin: 0 auto 0 auto;
}

.logo {
  height: 6em;
  width: 6em;
}

.header-horizontal-grouping {
  display: flex;
  align-items: center;
  margin-top: 1em;
  margin-bottom: 1em;
}

.header-description {
  margin-left: 2em;
}

nav {
  margin-top: 2em;
}

nav ul {
  display: flex;
  list-style-type: none;
  margin-bottom: 0;
}

nav li {
  margin-left: 10px;
}

nav a {
  padding: 2px 8px 0px 8px;
  color: black;
}

.selected-nav-item {
  background-color: hsl(0, 0%, 87%);
}

hr {
  margin-top: 0;
  border: 0;
  border-top: 3px solid hsl(0, 0%, 87%);
}

table {
  margin: 2em auto;
}

th {
  padding-bottom: 1em;
}

tbody tr:hover {
  background-color: hsl(0, 0%, 93%);
}

td {
  padding-left: 1em;
  padding-right: 1em;
}

footer {
  text-align: center;
}