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

body {
  color: #212121;
  font-family: Roboto, Noto, sans-serif;
  font-size: 13px;
  font-style: normal;
  font-variant: normal;
  font-weight: normal;
}
body::before, body::after {
  content: " ";
  display: table;
}
body::after {
  clear: both;
}