[LordRishav]

There are some details from the Win7 UI that is still not in the CSS, for example the gloss which appears when the mouse pointer hovers over the window action buttons.

Next, the dropdown menu isn't like Win7, it follows your browser/operating system's theme. For example, on Firefox-based browsers running on GNU/Linux it follows your GTK theme, rather than the Win7 theme. On standard Chromium-based browsers, it shows it as dark blue rather than glassy light blue of Win7.

Next, the scrollbar doesn't show as the Win7 one on Firefox-based browsers, but does on Chromium ones for some reason.

[jeroenhd]

Firefox has put some restrictions on scrollbar styling after websites began abusing it for their branding at the cost of accessibility. Other browsers did something similar. I'm not sure if you can even customise the dropdown menu if it's styled by your OS by default, either.

You're right about the missing highlights. Those feel like something not too difficult to implement with a CSS animation and some extra colored borders, so hopefully someone will write a PR for that eventually.