theshell.ch/site/_sass/_topics.scss

ol {
   list-style: none;
   counter-reset: command;
   width: 50%;
 }

 .list-commands {
   border-radius: 50px;
   background-color: #bdbdbd;
   counter-increment: command;
   margin-bottom: 5px;

   a{
   	height:29px;
   	width:calc(100% - 2em - 20px);
   	text-decoration: none;
    font-size: 2.5vh;
    font-weight: bold;
    display: inline-block;
    margin-left:20px;
   }
 }

 .list-commands:before {
   content: counter(command);
    background: #6a6;
    border-radius: 100%;
    padding: 7px 11px;
    font-size: 1.8vh;
    text-align: center;
    display: inline-block;
 }

 .list-commands:hover{
 	background-color: #646464;
 }