@media screen and (max-width: 700px) {
    header .container {
        display: flex;
        flex-direction: column;
    }

    header .container nav {
        margin-top: 5px;
        margin-bottom: 5px;
    }

    .botao {
        margin-top: 5px;
        width: 40%;
        height: 80px;
    }
}

@media screen and (min-width: 800px) {
    .descricao {
        width: 65%;
    }
}