background main content main .tm content

Hello. I'm trying to change to black the content of main article. I tried in custom.css to put this code but without any luck: The rules seems simply ignored.

here is the link: www.theblackstuff.it/main/index.php?opti...=0&sort=0&Itemid=175
Any ideas ?

Thank you very much in advance for help

Regards, Alessandro

Ciao, there is a missing closing "}" in your custom.css
Right Code

@media (max-width: 1024px) {
.absolute {
display: none;
}
}