*{
  padding:0;
  margin: 0;
}
body{
  padding: 10px;
}
ol{
  margin-left: 2em;
}
.list-backup-codes{
  width: 30%;
  float:left;
  .code-used{
    position: relative;
    &:after{
      position: absolute;
      left: 0;
      right: 0;
      top: 45%;
      bottom: 35%;
      border-top: 1px solid #666;
      border-bottom: 1px solid #666;
      content:"";
    }
  }
}
.backup-codes{
  max-width: 500px;
  margin: 20px 0;
  overflow: hidden;
}
.fixed{
  clear: both;
  float:none;
}