Different SVG icon size on smartphone

Hi there,

I’ve got a few SVG icons on my page which occupy quite a lot of space on a smartphone. How do i downsize these or let them disappear in the smartphone mode? I already tried to add this to the inline css of the svg: ‘@media (max-width: 480px){ width:75px; height:75px;’ but it’s not the wright way i suppose..

This is the site: https://www.cafetariadezagerij.nl

Can you help me out?

Cheers!