Evergreen template does not allow for full width content like maps/timeline embeds or blocks. According to the comments below, they're being limited in markup, not CSS.
Should Evergreen template always use full container but limit paragraph widths on CSS?
Should we have an additional template that will be entirely full container and let the Editor choose? (and how is that different than the Default template, other than the background...?)
Laura Hilliger this is linked to blocks work (which has not yet started) to make them responsive regardless of container size.