Plan step 36. border-width: 0 rather than border: 0, so the bubble's computed border matches what Tailwind's border-0 drew. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9