Alignment of Featured Image in Posts in Twenty Fourteen Theme

Hello,

we are running our site using a child theme to the twenty fourteen theme. Regularly the featured images are centered above the title of posts and pages. But since we don’t want to use large images, we’d like them to be aligned on the right side above the title of posts and pages.

Which code would we have to add to our child style.css in order to make sure the featured images will be aligned right instead of centered.

Thanks in advance for your help.