CSS do botao

a{
    display: inline-block;
    font-family: 'Open sans', sans-serif;
    background-color: #754EF9;
    border: none;
    border-radius: 25px;
    color:#FFF;
    padding: 15px 30px;
    height: 50px;
    font-size: 15px;
    text-transform: uppercase;
    text-decoration: none;
    text-align: center;
}