button {

    display: inline;
    margin-right: 10;
    margin-left: 10;
    width:"80px";
    height:"60px";
    padding: 15px 33px;
    background-color:#f38630;
    border-radius:10px ;    
    font-family: inherit ;
    color: rgb(255,255, 255);
    size: 60px;
    cursor: pointer;
    margin-bottom: 30px;
    box-sizing: border-box;
    
    
}

button:hover:not(.limpar-button) { background-color: #21d51b; transition: 0.7s; }
 /* adicionado :hover */
.active-button {
    background-color: #21d51b !important; /* Mesmo estilo do :hover */
}