.container {
  margin: 0 auto;
  width: 80%;
}

nav, footer {
  background-color: #333;
  color: #fff;
  text-align: center;
}

nav {
  display: flex;
  flex-direction: column;
}

nav > a {
  flex: 1;
  text-align: center;
  text-decoration: none;
  color: #fff;
}

@media only screen and (min-width: 768px) {
  nav { flex-direction: row; }
  .project-container { display: flex; }

  .project-container .project-list { width: 20%; }

  .project-container .project { flex: 1; }
}