I've been learning design layout basics (https://beaconhillpublishers.com/typesetting-layout-adjustment) and noticed that examples often look perfect, while real documents are much harder to organize. How do designers decide when to break standard spacing, margins, or alignment rules? What happens when a layout needs to work across print, tablets, and phones? I'd appreciate honest suggestions from experienced designers about which basic principles actually matter most when projects become complicated.