a:before {
   color: #fff;
   background: #000;
   font-size: 120%;
   padding: 2px 5px;
   display: inline-block;
   width: 1.2em;
   margin-right: 10px;
   text-align: center;
}

a[href^="mailto:"]:before {
  content: "\2709";
}

a[href^="tel:"]:before {
  content: "\2706";
}

a[href$="vcs"]:before {
  content: "\231A";
}


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