Nesting

.nav {
  background: #333;

  ul {
    list-style: none;
    margin: 0;
  }

  li {
    display: inline-block;

    a {
      color: #fff;
      text-decoration: none;

      &:hover {
        color: #1976d2;
      }
    }
  }

  > .logo { font-weight: bold; }
}