div {
  background: red;
}.cls {
  color: green;
}

#id {
  font-size: 10px;
}

/* comment */

@media screen and (min-width: 1000px) {
  a {
    text-decoration: underline;
  }
}

a:hover {
  font-weight: bold;  
}

section 


{
  margin: 0;
  /* comment wthin a rule */
  padding: 5px;
}


body > * {
  
}