p{
  max-width: 800px;
  text-align: center;
  margin: 40px auto;
}

p:first-of-type{
  font-size: 20px;
  margin: 40px auto 50px auto;
}

#content{
  min-height: 1px;
}

@media screen and (max-width: 800px) {
  p{
    margin: 20px auto;
  }

  p:first-of-type{
    font-size: 16px;
    margin: 20px auto 25px auto;
  }
}