html {
  margin: 0;
  padding: 0;
}
body {
  overflow-x: hidden;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  margin: auto;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
  height: 100vh;
  display: flex;
  flex-direction: column;
}
#content {
  flex: 1;
}