The .o_fc_dashboard .o_form_sheet override wasn't winning specificity against Odoo's default form-sheet constraints. Added a dedicated class o_fc_dashboard_sheet directly on the <sheet> element + !important overrides on max-width, width, and flex to stretch the sheet to the full container width. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>