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How to style a table data export from SpreadSheet?

Hi, i am newbie
I have a script which can display my data from a SpreadSheet on Webpage. But i dont know how to style and adding filter function on it. Could someones help me? Thank in advance!
Here is the image which table data look like

Here is the immage which i want to archive

*Note: the code in Style Guide page

Here is my site Read-Only:
(how to share your site Read-Only link)