- Alias .form-group to .form-field in main.css so contact form inputs get full styling
- Hide header Get Estimate btn on <=480px (mobile drawer has CTA, prevents logo+btn+hamburger overflow)
- Tighten header-inner gap to space-4 on <=480px
- Drop redundant btn-sm padding override from 360px rule (btn now hidden at that width)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>