* {
  white-space: nowrap;
}
.rect {
  padding: 5px 10px;
  background: #F00;
}
@media screen and (max-width: 400px) {
  .rect {
    background: #0F0;
  }
}
@media screen and (max-width: 200px) {
  .rect {
    background: #00F;
  }
}