Remove Metadata from post

I wanted to remove the metadata (author and date) from the post carousel and post list, I added the following css code, but they are still there.
.post-meta {
display: none;
}

Please help. My site is www.shebasjewels.com

I just checked again and it looks like the meta data is removed.

Hello, so is this issue already resolved?

Kind Regards, Roman.