html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
}

.container {
  flex: 1;
}

footer {
  border-top: 1px solid #dee2e6;
  background-color: #212529;
  color: white;
  padding: 1rem 0;
  margin-top: auto;
}