Add styling for error summary box
Add styling for error summary box


Former-commit-id: 01d121377afe42357bcaeac75ff7bc938cca73db
Former-commit-id: e0d1f1032f873fc44fde2db8ae19c48eb953cd7d
Former-commit-id: f44e1a7ce1a8faca4a445dcf4621d5e2a93f2840
ONSdigital/florence,ONSdigital/florence,ONSdigital/florence,ONSdigital/florence