html {
  height: 100%;
  min-height: 100% !important;
  border-collapse: collapse;
  margin: 0;
  padding: 0;
}
body {
  height: 100%;
  min-height: 100% !important;
  font-family: Arial, Helvetica, sans-serif;
  color: white;
  background-color: black;
  margin: 0;
  padding: 0;
}
a {
  color: teal;
}
#container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
#content {
  flex: 1;
}
header {
  padding-bottom: 1em;
}
footer {
  margin-top: auto;
  padding-bottom: 1em;
}