Log in form markup & CSS

This can appear at any point but is likely to appear at page load.

I imagine it sliding in from the top of the page, and dimming everything else. LIke a modal dialog but attached to the top of the viewport. On mobile devices it'll be full width, on larger devices it can be centered.

I think I'm imagining something like Chrome's basic auth box:


…although I'm no designer, so if you have better ideas, go for it.

As for the content of the form, the Tweetdeck one seems sensible:


We don't need to bother catering for old logins.

There's already a view for the login box `Login.js` and a template `login.hbs`.