body.dark-mode {
  background-color: #121212;
  color: #ffffff;
}
body.dark-mode a {
  color: #9ad1ff;
}
body.dark-mode .navbar,
body.dark-mode footer {
  background-color: #1f1f1f;
}
body.dark-mode .navbar .nav-link,
body.dark-mode .navbar-brand {
  color: #ffffff;
}