Is there any way of increasing the width of the page to free up more space for the posts? The theme seems to be bound by a pre-set border that does not increase with the browser window. Especially for the longer, more wordy posts, they end up looking squashed—which is strange, since there is so much free space outside of the border.
This is possible with the use of Custom CSS which becomes available when you upgrade to WordPress.com Premium or Business. If you decide to upgrade and you need help with the code just make a post over in the CSS Customization forum, and we’ll help you out there: