Hide specific page in mobile devices

Hi!

I’m trying to hide a specific page from mobile view, I found another post with the same question and you gave him this alternatives:

Hide menu

@media only screen and (max-width: 480px) {
#menu-item-59 { display: none !important; }}

Hide page

@media only screen and (max-width: 480px) {
.page-id-88{ display: none !important; }}

But I can’t make them work, I tried with multiple pages without any success.
Thank you!