Css classes

class = "indent" in "<a" tag

.indent{
       margin-left: 10px;
 
}
 
<span class="ident">asdfasdf</span>  # To make indent first line of paragraph
 
 
.gap-below{
           margin-below: 25px;   # put in "<p" tag
}
 
.greeen-link:hover{
               color: green;
               background: gray;
}

Classes can style any tag