Sass I'm stuck /5.Nesting Properties


#1

I nested .border properties inside of .banner and I get an error message “expected div.banner to have its border-bottom style equal to 4px solid black but got 3.98438px solid #000000
Should I convert font-size and font color in some way or is it just a bug?
*main.css also shows 4px solid black so I think I nested right.

.banner {
  font-family: 'Pacifico', cursive;
  height: 400px;
  background-image: url("lemonade.jpg");
  border : {
    top: 4px solid black;
    bottom: 4px solid black;
	  }
  
  .slogan {
    position: absolute;
    border: 4px solid black;
    top: 200px;
    left: 25%;
    width: 50%;
    height: 200px;
    text-align: center;
    
    .span {
      font-size: 24px;
      line-height: 200px;
    }
  }
}