html {
  height: 100%;
}

body {
  background-color: #242222;
  font-family: "Roboto", sans-serif;
  color: #787070;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  margin: 0;
}

header {
  text-align: center;
}

main {
  flex-grow: 1;
  padding: 1rem;
}