Twenty Fourteen: Sidebar links are not clickable on narrow 2-column layout

[Nao]

Issue summary:
The links contained in the right sidebar div become un-clickable when:

• the window width is less than 1008px
• #content-sidebar div height is greater than that of .site-content div
• the sidebar links appear above the height of the content div

This issue happens on the home page or static pages, but not on single post or archive pages.

Steps for reproduction:

• Set "Blog pages show at most" to "1" on Reading Settings screen.
• Add widgets to the right sidebar so that the sidebar becomes taller than the post content area
• Set the window width between 673-1007 px
• Try clicking the sidebar link - the cursor will not change to finger icon as it supposed to

Tested on Chrome 31/ Safari 7 on Mac 10.9
Originally reported on ​http://ja.forums.wordpress.com/topic/1159?replies=1

[MikeHansenMe]

Looks to me like the #content-sidebar is at the same level as #primary and that .site-content should not have an effect on #content-sidebar. I tested this on FF26 and Chrome 31 on Ubuntu. Could you provide us with your browser/OS so we can look into this problem more?

[celloexpressions]

Confirmed with Chrome 32 on Windows 8.1. Not an issue in Firefox or IE.

More specifically, when the content area is shorter than the sidebar in those viewpoints, the z-index of the .content-area (which is full-width) appears to be above that of .content-sidebar, so it isn't possible to interact with them (by selecting text, clicking links, etc.). An exception is the post meta links in the ephemera widgets.

This is most likely a Chrome/Webkit bug, but setting the positioning of .content-sidebar seems to fix it.

[Nao]

I applied the change in the patch and confirmed the issue is fixed.

[lancewillett]

In 27121:

Twenty Fourteen: fix unreachable links when the content area is shorter than the sidebar in smaller viewpoints. Props celloexpressions, see #26782.

[nacin]

lancewillett and I decided that we would be leaving all bundled theme tickets for 3.9. Given the timeline (and lack of severity) we won't be doing a theme update before then.