footer {
  width: 100%;
  background: linear-gradient(
    to bottom right,
    rgba(100, 180, 255, 0.9),
    rgba(100, 180, 255, 0.3)
  );
  padding: 2vw 1vw;
  font-size: 1vw;
  color: #555;
}

.footer-links {
  text-align: center;
  margin-top: 2vw;
}

.footer-links a {
  display: inline-block;
  color: #333;
  text-decoration: none;
  font-weight: 300;
  transition: color 0.3s;
  position: relative;
  padding: 0 1vw;
  text-align: center;
}

.footer-links a:not(:first-child) {
  border-left: 1px solid #999;
}

.footer-links a:hover {
  color: #777;
}

footer p {
  margin-top: 3vw;
  text-align: center;
}

@media screen and (orientation: portrait) {
  footer {
    font-size: 2.5vw;
    padding: 5vw 0;
  }

  .footer-links {
    margin-top: 0;
  }

  .footer-links a {
    padding: 0 2vw;
  }
}