header, footer {
  display:flex;
  flex-direction:row;
  flex-wrap:wrap;
  justify-content:space-around;
  width:87%;
  height:auto;
  margin-left:auto;
  margin-right:auto;
  text-align:center;
  font-size:1.3rem;
  padding:2px;
}
    
header {
  margin-top:15px;
}
    
footer {
  margin-bottom:15px;
}
    
header > button, footer > button {
  padding:2px;
}