ul {
    background-color: red;
}

h2 {
  font-family: Georgia, 'Times New Roman', Times, serif;
}

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

nav a {
  display: block;
  padding: 14px 20px;
  color: black;
  text-decoration: none;
}

.course {
  display: flex;
  width: auto;
  height: auto;
  align-items: center;
  justify-content: center;
  padding: 9;
  border: 2px solid black;
  border-color: black;
}


.offer {
  width: auto;
  height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: auto;
  padding: 9;
  border: 2px solid black;
  border-color: black;
}