* {
  border: 5px solid #ffff00;
}


body div {
  display: inline;
  border: 10px solid #ff0000;
}

body div div {
  display: inline-block;
  padding: .5em;
  margin: .1em;
  border: 1px solid #00ff00;
  max-width: 250px;
  min-height: 250px;
}