fix: make Guru float perceptible

[xnoto]

Summary

Makes the Guru's existing float visibly perceptible: it now moves 2px above and below its resting position over 2.8 seconds. The prior 1px/3.5s animation was present and running, but was too subtle to see reliably.

Fixes # — not applicable; owner-reported visual follow-up.

Type of change

• Bug fix
• Feature / enhancement
• Documentation
• Infrastructure (OpenTofu root or module)
• GitOps desired state (manifests, kustomize, charts, SOPS/KSOPS secrets)
• Container image
• CI / reusable workflow
• Refactor / cleanup
• Breaking change

Validation

• Required pull-request checks pass — static-checks
• Generated or centrally distributed files were regenerated by their owning automation, not hand-edited (not applicable: source-only CSS timing/distance adjustment)

The passing PR check ran pre-commit validation and service-worker syntax checking. The existing prefers-reduced-motion override remains unchanged; live visual validation remains post-merge.

Impact and rollout

Self-contained in makeitworkcloud/www: only makeitwork.cloud/index.html changes. No producers, generated copies, PWA behavior, service worker, metadata, links, assets, or onion site changes. An owner-approved merge will automatically deploy the static site and purge Cloudflare; rollback is a revert followed by the same automatic deployment.

Safety and secrets

• Contains no plaintext secrets, decrypted SOPS values, state files, kubeconfigs, tokens, or private endpoints
• No local OpenTofu init/plan/apply/destroy/import/state operations were run or claimed — plans come from pull-request checks
• Breaking or irreversible effects are described above with rollback notes

This change was materially produced by an AI agent under owner direction.