.button {
   text-decoration: none;
   outline: none;
   display: inline-block;
   border-radius: 1.0em;
   border: solid 2px gray;
   box-shadow: 2px 2px 5px gray;
   margin: 5px;
   transition: all 0.2s ease-in-out;
}
.button:hover, .button:focus {
   background: lightgray;
}
.button span {
   display: inline-block;
   vertical-align: middle;
   margin: 0.5em;
   color: black;
}