a {
  color: #2176FF;
  text-decoration: underline;
  cursor: pointer;
}

a:hover {
  text-decoration: none;
}

nav-link {
  text-decoration: none;
}

nav.link:hover {
  color: #5495ff;
}

.btn:hover {
  background-color: #fff;
  color: #2176FF;
  transition: color .1s ease-in, background-color .1s ease-in;
}

.btn:active {
  font-size: 18px;
  transition: font-size .1s ease-in-out;
}

.activity {
  border: 1px solid #2176FF;
  cursor: pointer;
  text-decoration: none;
}

.activity:hover {
  background-color: #fff;
  color: #5495ff;
  transition: color .1s ease-in, background-color .1s ease-in;
}

.activity:active {
  font-size: 40px;
  transition: font-size .1s;
}