Details and Summary Styling

This article discusses several ways to style CSS dropdowns made using the details element. It is not only interesting but also very easy to understand.
20 Simple Ways to Style the HTML details Element

Free CSS and HTML Generator for Rows and Columns

CSS Grid Generator

API Guides

Blogger Cheat Sheet | OverAPI.com

IN operator

Blogger: Implementing a simple IF with an OR in the condition

An Archive List

blogger - filtering archive list widget by labels

Snippet Operator

How to make break after header in <data:post.snippet> in Blogger

Different Styles for Label Names

Blogger - give each label a different color