Hello,

1 &4) Could you please mention your computer screen resolution to check it myself and help you out accordingly.

2) This is because when the browser loads the page, it reads the HTML document from the top to the bottom, from the left to the right. When reading the HTML document, the browser would have read the whole DOM before reaching your CSS and JS scripts and executing them.

The Rendering engine:

The responsibility of the rendering engine as well… Rendering, that is the display of the requested contents on the browser screen. By default, the rendering engine can display HTML and XML documents and images. It can display other types of data via plug-ins or extension; for example, displaying PDF documents using a PDF viewer plug-in. However, in this chapter we will focus on the main use case: displaying HTML and images that are formatted using CSS.

Rendering engines:

Different browsers use different rendering engines: Internet Explorer uses Trident, Firefox uses Gecko, Safari uses WebKit. Chrome and Opera (from version 15) use Blink, a fork of WebKit.

So this only happens because of the Browser Rendering. To avoid it you have to use Cache on your site.

Hope this is all clear now.

3) Sorry but it is not possible with Custom CSS. It requires customizations and this is beyond our limitations and support policy.

Regards.
Xtemos Studios