This is a light theme for Nylas N1. The left sidebar hides out of the way and opens on hover, buttons have tooltips, and there are a few animations.

1. Download the latest release of the Snow theme.
2. Unzip the folder.
3. Open N1 and install the theme by going to Nylas N1 > Install New Theme... and selecting the directory which you unzipped.
4. Thats it!