header {
  position: relative;
  background-color: #333;
  color: #fff;
  padding: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 0px 0px 10px 0px;
  overflow: hidden;
  width: 180px;
  transition: width 0.3s ease-out;
  max-height: 30px;
}

header::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
}

header:hover {
  width: 100%;
}

header:hover nav {
  margin-right: 20px;
}

nav a:hover {
  background-color: #fff;
  color: #333;
  border-radius: 10px;
  padding: 5px;
}

.wordmark {
  font-size: 1.5em;
  font-weight: bold;
  order: 1;
  white-space: nowrap;
}

nav {
  display: flex;
  order: 2;
}

nav a {
  color: #fff;
  text-decoration: none;
  margin-left: 20px;
  padding: 5px;
}

footer {
  background-color: #333;
  color: #fff;
  padding: 20px;
  text-align: center;
  border-radius: 10px 10px 0px 0px;
  width: 100%;
}