How do I push down head with Custom CSS?

– Your currently used “AffiliateReviewPlus” theme is not in the wordpress.org/themes/ directory: https://wordpress.org/themes/search/AffiliateReviewPlus/

– Please contact the developer directly for support with your question. You’ll be more likely to find a good answer from them, for they have the access to its code. Forum volunteers are not given access to commercial products. The vendors are responsible for supporting their commercial product. These forums are for free themes available in the WordPress theme directory at wordpress.org/themes/. See http://codex.wordpress.org/Forum_Welcome#Commercial_Products