Media queries not working on customer portal

Content

Hey guys!

I'm using media queries on a customer portal page but they don't seem to be working. Format for the queries is as bellow.

I'm attaching an example of the html/css parts of my code and you can also check the actual version here: https://mrvluggo--tst3.custhelp.com/app/respostaClienteOrcamento

I'm not very familiar with front-end coding, so maybe  I'm missing some tricks. Any ideas?

Thanks!

 

Code Snippet

@media only screen and (max-width: 460px) {
    .agendamentovisita .botoes {
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
}