.required{
    color: red;
}
body{
  margin-left: 20%;
  margin-right: 20%;
}
form{
  display: flex;
  flex-flow: row wrap;
  justify-content: space-evenly;
}
div{
  display: flex;
  flex-direction: column;
}
#submitted{
  display: none;
  color: green;
}
#subbed:focus +#submitted{
  display: block;
}