.btn-grad {
background-image: linear-gradient(to right, #603813 0%, #C59E2C 51%, #603813 100%);
margin: 10px;
padding: 15px 45px;
text-align: center;
text-transform: uppercase;
transition: 0.5s;
background-size: 200% auto;
color: white;
box-shadow: 0 0 20px #eee;
border-radius: 10px;
display: block;
         }
.btn-grad:hover {
background-position: right center;
/* change the direction of the change here */
color: #fff;
text-decoration: none;
 }