` element that will contain your game canvas. Remember that this `

` element was given an id name of `my-game` which can be used to select this element with your CSS. Copy this CSS, and paste it into your `style.css` file (replacing any other starter CSS that might already be present): ```css /* optional CSS for game container */ #my-game { width: 800px; height: 600px; margin: 0 auto; border: 1px solid black; } ``` Here is an explanation of what this CSS does: * Lines 3 and 4 set the width and height (in pixels) for the `

` element that will contain the game canvas. Later in your JS game code, you'll set your game canvas to these same exact dimensions. * Line 5 sets the margins around the `

` element. The top and bottom margins have been set to zero. The left and right margins have been set to `auto`, which will center the game canvas horizontally on the webpage. * Line 6 displays a border around the `

` element. ## Add CSS for Other Elements Let's add some other **optional** CSS to style some of the other elements of the webpage. Copy this CSS, and paste it into your `style.css` file **after** your existing CSS: ```css /* optional CSS for webpage */ body { background-color: #E0FFFF; font-family: sans-serif; text-align: center; } h1 { color: #663399; } p { font-size: 1.25em; } ``` As you can see, this CSS styles some of the properties for several elements on the webpage: * The `` element is given a light blue background color and is set to use a sans-serif font for all text, which will also be center-aligned on the webpage. * The `

` element is set to use a purple text color (instead of the default color of black). * The `
` element is set to use a larger font size (instead of the default size of 1em, which is typically 16 pixels tall — so 1.25em should be equal to 20px). Again, all of this CSS is optional. If you wanted, you could modify this CSS — or add other CSS to style additional properties for the elements on the webpage. {% hint style="info" %} CSS: If you want to learn more about CSS or need a quick reference, check out the [W3Schools CSS Tutorial and Reference](https://www.w3schools.com/css/default.asp). {% endhint %} ## Preview Webpage Preview the webpage in your code editor. Depending on your code editor, you might need to refresh its preview pane. If necessary, open the preview in a new tab or window to view it in fullscreen. Your webpage should have a light blue background, and you should see a black border outlining where the game canvas will eventually be inserted (once you add the proper JS code to the `script.js` file). Below that you should see the game's title (in purple text) and your name. Everything should be centered horizontally.
--- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.idew.org/code-video-game/tutorials/hello-phaser/a-3-add-css-for-game.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.