docs(#327) add styling your components guide

packages/website/pages/styling-your-component.md

@@ -0,0 +1,75 @@
+---
+layout: layout.html
+title: Styling your component
+---
+
+The first thing to do when styling your component is to decide what method you want to use to add styles. The options are:
+
+- render function
+- css file
+- inline string
+
+If you're just adding a little bit of style, the inline string is probably your best solution. A standalone css file can be nice if you highly value the separation of concerns. A render function is needed if your styles are derived from data, like props, or something fetched from an api.
+
+## .css file
+
+This is the solution I reach for first. You can `import` the css file if you're using `@tybalt/esbuild-plugin` or `@tybalt/cli` to build your project, and then hand it directly to the css property on `defineComponent`.
+
+```js
+import { defineComponent, html } from '@tybalt/core';
+import css from './index.css';
+
+export default defineComponent({
+    css,
+    render() {
+        return html`<div class="my-class">hello world</di>`;
+    }
+});
+```
+
+## Inline strings
+
+You can similarly pass a string of css directly to the `css` property on the `defineComponent` options object. This is good for fast solutions.
+
+```js
+import { defineComponent, html } from '@tybalt/core';
+
+export default defineComponent({
+    css: `
+        .my-class {
+            color: rebeccapurple;
+        }
+    `,
+    render() {
+        return html`<div class="my-class">hello world</di>`;
+    }
+});
+```
+
+## Render function
+
+The final option is that you can pass a function to `css` to give it a chance to re-render each time the `render` function is called
+
+```js
+import { defineComponent, html } from '@tybalt/core';
+
+export default defineComponent({
+    css({ customColor }) {
+        return `
+            .my-class {
+                color: ${customColor};
+            }
+        `;
+    },
+    render() {
+        return html`<div class="my-class">hello world</di>`;
+    },
+    props: {
+        customColor: {
+            validator: string()
+        }
+    }
+});
+```
+
+This can lead to a lot of "thrash" for the style and layout rendering, so be sparing in its use.