body {
    background-color: lightblue;
  }

  #top-heading{
 
    margin-bottom: 1em; 
    background-color: orange;
    padding: 1.7rem;
}
  }
  h1{
    color: navy;
    margin-left: 2px;      
  }
  
  h4 {
    color: navy;
    text-decoration: underline;
    text-align: center;
  }

  .oil-type{
    margin-top: 1.5em; 
      margin-bottom: 1.2em; 
      margin-left: 15em;
      margin-right: 15em;
      letter-spacing: .1em;
  }

  .wear-class, .additives-class, .contaminates-class, .direct-class{
      margin-top: 1.2em; 
      margin-bottom: 1.2em; 
      margin-left: 15em;
      margin-right: 15em;
      letter-spacing: .1em;
      padding-top: .5em;
      padding-bottom: .5em;
   
  }
  input{
    font-size: .8em;
    font-weight: bold;
  }
  
  label{
    font-size: 1.2em;
    font-weight: bold;
    
  }