Pulsante con animazione

<form method="get" action="http://www.puntoinformaticofree.it/"><button class="mybtn animato">Scopri di più</button></form>

.mybtn {
  box-sizing: border-box;
  -webkit-appearance: none;em
  -moz-appearance: none;
  appearance: none;
  background-color transparent;
  border: 3px solid #e74c3c;
  border-radius: 3em;
  color: #FF6600;
  cursor: pointer;
  display: flex;
  align-self: center;
  font-size: 16px;
  font-weight: 400;
  line-height: 1;
  margin: 20px;
  padding: 1.2em 2.8em;
  text-decoration: none;
  text-align: center;
  text-transform: uppercase;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
 }


.animato {
  border-color: #FF6600;
  border-radius: 3;
  color: #FF6600;
  position: relative;
  overflow: hidden;
  z-index: 1;
  transition: color 150ms ease-in-out;
 }

.animato:after {
  content: '';
  position: absolute;
  display: block;
  top: 0;
  left: 50%;
  -webkit-transform: translateX(-50%);
  transform: translateX(-50%);
  width: 0;
 height: 100%;
 background: #FF6600;
  z-index: -1;
  transition: width 150ms ease-in-out;
 }
.animato:hover {
  color: white;
 }
.animato:hover:after {
 width: 110%;
 }