I finally picked an avatar and noticed it's super pixellated - even the main NS logo looks a bit stretchy since I have a retina screen. You might want to update that to include 2x size assets for hi-dpi displays.
For example the logo is already in a 220x80 container, so you could put a 440x160 image in there with (width: 100%; height: 100%) and it would automatically scale based on the display scaling
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