p.button {
   margin-top: 1em;
   padding: 0.5em;
   text-align: center;
   font-size: 1.2em;
   font-weight; bolder;
}

a.button {
   padding: 10px;
   border: solid red;
   border-width: 5px;
   border-style: outset;
   text-decoration: none;
}

a:hover.button {
   padding: 10px;
   border: solid red;
   border-style: inset;
   border-width: 5px;
}