remove space above comment form

Hi there,

That space is contributed by quite a few things.

Try this CSS first:

.author-box {
    padding-bottom: 0;
}
.author-box p {
    margin-bottom: 0;
}

I tried it, no noticeable change so far..

The space has decreased with the CSS for sure.

You can add this to reduce it some more:

.separate-containers .comments-area {
    padding-top: 0;
}

Please clear and disable your caching plugin if you need further help with this.