1 .doc-supsub {

     2     display: inline-block;

     3     sup,

     4     sub {

     5         position: relative;

     6         display: block;

     7         font-size: .5em;

     8         line-height: 1.2;

     9     }

    10 

    11     sub {

    12         top: .3em;

    13     }

    14 }