Distillation

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<observations> Date: Jul 21, 2026 * 🔴 (12:40) User stated GitHub Pages DNS Check is now green but "Enforce HTTPS" is still greyed out. * 🟡 (12:40) Assistant explained DNS check and cert provisioning are separate steps: green DNS check only means GitHub can resolve domain to its own IPs; "Enforce HTTPS" stays greyed out until Let's Encrypt cert provisions, typically 15 minutes to an hour after check goes green, sometimes longer. * 🟡 (12:40) Assistant suggested two unstick actions: (1) click Remove on custom domain in GitHub Pages settings, wait, re-enter byk.im, and Save to force re-verification and cert issuance; (2) confirm DNS record still DNS-only (grey cloud) so Let's Encrypt HTTP-01 challenge to origin can complete — warned that if Cloudflare re-proxied, challenge fails silently.