span.icon::before {
  content:"";
  display: inline-block;
  vertical-align: middle;
  background-repeat: no-repeat;
  background-position: center center;
  background-size: contain;                
  position: relative;
  top: -1px;
}

span.email::before {
  background-image: url(../images/letter.svg);
  width: 24px; 
  height: 24px;
  margin-right: 12px;
}

span.badge::before {
  background-image: url(../images/badge.png);
  width: 20px; 
  height: 20px;
  margin-right: 5px;
}