gistfile1.txt

.my-block {
  display: block;
  position: absolute;
  top: 0;
  margin: 0 auto;
  width: auto;
  
  @include bp-md {
    position: static;
    margin: 50px;
    width: 50%;
  }
  
  &:focus {
    color: purple;
  }
}