Ion-nav-bar and ion-side-menu with nav bar full-width

The topic says it - I have, in my index.html, an ion-nav-bar and an ion-side-menus section with a left-aligned ion-side-menu. The side menu sports expose-aside-when=‘large’.

How can I rearrange the priority of the two elements, so that the nav bar goes full-width, and the side menu only comes down as far as the nav bar? I’ve tried putting the HTML for both components the opposite way round, but this didn’t work.