footer.css

.footer {
  padding: 40px 0;
  background: #333;
  font-size: 15px;
  color: #fff;
  text-align: center;
}

.footer a {
  color: #bebebe;
  text-decoration: none;
  transition: color .2s ease-in-out;
}

.footer a:hover,
.footer a:focus {
  color: #fff;
}

.footer__nav,
.footer__copy,
.footer__author {
  display: inline-block;
  padding: 10px 20px;
}

.footer__content {
  display: inline-block;
}

.footer__copy,
.footer__author {
  margin: 0;
}

.footer__nav ul {
  margin: 0 -10px;
  padding: 0;
  list-style: none;
}

.footer__nav ul li {
  display: inline-block;
  padding: 0 10px;
}