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textual/docs/guide/styles.md
2022-09-10 16:45:13 +01:00

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# Styles
Textual provides a large number of *styles* you can use to customize how your app looks and feels. In this chapter will will look at how you can edit styles in your applications.
## Styles object
Every widget class in Textual provides a `styles` object which contains a number of writable attributes. Styles define the position and size of a widget, in addition to color, text style, borders, alignment and much more.
Let's look at a simple example which sets the styles on the `screen` (a special widget that represents the screen).
```python title="screen.py" hl_lines="6-7"
--8<-- "docs/examples/guide/styles/screen.py"
```
The first line sets `screen.styles.background` to `"darkblue"` which will change the background color to dark blue. There are a few other ways of setting color which we will explore later.
The second line sets `screen.styles.border` to a tuple of `("heavy", "white")` which tells Textual to draw a white border with a style of `"heavy"`. Running this code will show the following:
```{.textual path="docs/examples/guide/styles/screen.py"}
```
## Box Model
<div class="excalidraw">
--8<-- "docs/images/styles/box.excalidraw.svg"
</div>
TODO: Styles docs
- What are styles
- Styles object on widgets / app
- Setting styles via CSS
- Box model
- Color / Background
- Borders / Outline