Component CSS File
A component can include a CSS file. Use standard CSS syntax to style Lightning web components.
To style a component, create a stylesheet in the component bundle with the same name as the component. If the component is called
myComponent, the style sheet is
myComponent.css. The stylesheet is applied automatically.
A component’s CSS file can have a maximum file size of 128 KB (131,072 bytes).
To share CSS style rules between components, create a module that contains only a CSS file and a configuration file. Import the module into the CSS files of Lightning web components.