#botao {
    width: 165px;
    height: 20px;
    font-size: 16px;
    font-weight: 500;
    color: #fff;
    background-color: #21a533;
    border-radius: 4px;
    margin: 0;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    margin-bottom: 10px;
    padding: 25px;
    text-transform: uppercase;
    transition: all .3s;
}
#botao:hover {
    color: #ddd;
    background-color: #197c26;
    transition: all .3s;
}