Vertically Centered :after background data URI

by johnbk

HTML

<a class="btn" href="#">GLOBAL SOURCING AND SUPPLY CHAIN MANAGEMENT</a>
<br>
<a class="btn" href="#">GLOBAL</a>
 <br>
<a class="btn" href="#">GLOBAL SOURCING AND SUPPLY CHAIN MANAGEMENT GLOBAL SOURCING AND SUPPLY CHAIN MANAGEMENT GLOBAL SOURCING AND SUPPLY CHAIN MANAGEMENT</a>
 <br>

CSS

.btn{
  background-color: #bfd3ef;
  display: block;
  font-family: RobotoCondensed;
  font-weight: bold;
  padding: 15px 20px;
  position:relative;
  border-bottom: 5px solid #a3c0e4!important;
  max-width: 300px;
  line-height: 22px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.btn:after{
  content: '';
  float: right;
  display: block;     background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAAWCAYAAAAW5GZjAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAKFJREFUeNpi/P//PwOxgBGbYsawZQegzAv/V0UVEFKMLLgQqCEBxGDCYeNFJHY8UPMCsCEMoUsNgDTIWn4CTl4IUvwAyJAnxoMgZwQA8Uci1C7E5cELQEof3ZO4PKiPLTRYcCg+SHQ4kxSDpCqGRzcQw53BAFKMBSODBTBxXIovYNMAkjAA4g//CYMFIDcTHd0kmUyym4kODZLCmaQYBAgwABskKz4QKS4hAAAAAElFTkSuQmCC);
    right: 28px;
    width: 11px;
    height: 11px;
    overflow: hidden;
    position: absolute;
    top: 40%;
    right: 5%;
}