Modifying Custom CSS for Community Login Page

I'm interested in applying custom CSS to the Login page
In particular I want to add a drop shadow the h2.fcom_title and a css filter to the logo. I tried this but it doesn't work (I used the custom css module in the forum settings)

h2.fcom_title{
text-shadow: 1px 1px 2px #000 !important;
}

.fcom_logo a img{
filter: drop-shadow(2px 2px #000) !important;
}