nav {
  color:red;
  background-color: purple;
  margin: auto;
  display: flex;
  justify-content: center;
}

ul,
li {
  list-style: none;
  padding: 0;
}
li {
  padding: 0.5em 1em;
  margin: 0.5em;
  background-color: rgb(209, 209, 209);
}
ul {

  background-color: rgb(233, 233, 233);
  margin: 1em auto;
  display: flex;
  justify-content: center;
}
  
.bubble {
  color: blue;
}
}