How to organize CSS style sheets in div layouts

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For a simple Web site, you can use only one CSS file. For large, complex sites, it is a good practice to split style sheets to simplify maintenance. How to split a style sheet requires careful consideration. I usually use a CSS file to handle the basic layout and use another file to handle the layout and design decorations. In this way, after the layout is determined, there is little need to modify the layout style sheet. This prevents the layout style sheet from being accidentally altered or corrupted.

You can also subdivide further, such as using a separate CSS file to handle colors. That way, if you want to provide a new color scheme, you just need to create a new color style sheet. If there are many forms on the site, you can use a separate CSS file to work with all form styles. You can link this file only when needed, reducing the initial download overhead. If some pages on a site are very different from the rest of the site, consider having them use their own CSS files. For example, if the layout of the home page is very different from the rest of the site, you can create a separate CSS file for the home page.

Keep in mind that every CSS file means an extra call to the server. This affects performance, so some developers prefer to use a large CSS file rather than multiple small files. The ultimate choice actually depends on the actual situation, and in some ways it is a matter of preference. I tend to be as flexible and as easy to maintain as possible.