body,
html {
  height: 100%;
}

* {
  font-family: Arial, sans-serif;
  line-height: 1.4;
}

.d-flex {
  height: 100%;
}

h1 {
  font-weight: 500;
  margin: 0;
  padding: 0;
}

a,
a:visited,
a:active {
  color: #000;
  text-decoration: none;
  transition: color .3s;
}

a:hover {
  color: #999;
  text-decoration: none;
}