You can automate this with the prioritize_critical_css filter in the PageSpeed module: <a href="https:&#x2F;&#x2F;developers.google.com&#x2F;speed&#x2F;pagespeed&#x2F;module&#x2F;filter-prioritize-critical-css" rel="nofollow">https:&#x2F;&#x2F;developers.google.com&#x2F;speed&#x2F;pagespeed&#x2F;module&#x2F;filter-...</a><p>(Disclaimer: this is what I work on.)