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

body {
  font-family: Arial, Helvetica, sans-serif;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-justify-content: center;
  -moz-justify-content: center;
  -ms-justify-content: center;
  justify-content: center;
  -ms-flex-pack: center;
  -webkit-align-items: center;
  -moz-align-items: center;
  -ms-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  background: #2d3d53;
  color: #ffffff;
}