Change line-height of custom css

Hi there,

I was able to use the CSS below to change the special headings (all of them). BUT I only want to change one, I have added a custom CSS code for it of lineh , but it’s not working when I do the following code. Probably a stupid error, sorry!

Code that doesn’t work:
@media only screen and (max-width:479px) {
.lineh {
line-height: 0.5em;
display: block;
padding: 0 !important;
}
}

This code works for all special headings:
@media only screen and (max-width:479px) {
#top #wrap_all .av-inherit-size .av-special-heading-tag {
line-height: 0.5em;
display: block;
padding: 0 !important;
}
}