# Google HTML/CSS Style Guide Summary
This document summarizes key rules and best practices from the Google HTML/CSS Style Guide.
## 1. General Rules
- **Protocol:** Use HTTPS for all embedded resources.
- **Indentation:** Indent by 2 spaces. Do not use tabs.
- **Capitalization:** Use only lowercase for all code (element names, attributes, selectors, properties).
- **Trailing Whitespace:** Remove all trailing whitespace.
- **Encoding:** Use UTF-8 (without a BOM). Specify `` in HTML.
## 2. HTML Style Rules
- **Document Type:** Use ``.
- **HTML Validity:** Use valid HTML.
- **Semantics:** Use HTML elements according to their intended purpose (e.g., use `
` for paragraphs, not for spacing).
- **Multimedia Fallback:** Provide `alt` text for images and transcripts/captions for audio/video.
- **Separation of Concerns:** Strictly separate structure (HTML), presentation (CSS), and behavior (JavaScript). Link to CSS and JS from external files.
- **`type` Attributes:** Omit `type` attributes for stylesheets (``) and scripts (`