Resolved keep padding

hello

How can I keep the padding of above

#g-main .g-content > div, #g-sidebar .g-content > div, #g-aside .g-content > div {
padding: 20px 0;
}

as
#g-main .g-content > div, #g-sidebar .g-content > div, #g-aside .g-content > div {
padding: 20px;
}

I change it in the hydrogen_17.css and in the custom.css without effect ...

Thanks a lot
marie