gallery responsive

hi,
I upload acm gallery module because I need ( http://pirriprova.sviluppo.host/it/sale-da-bagno.html )it but it' not responsive, can you help me please?
thank you

Could you share screenshot of how it should be so I can check?

You can try this:

.acm-gallery .isotope-layout.container {
    width: 100%;
}