Global Styles
Add global styles from your theme.
Use the styles.global key in your theme to set theme-aware styles for any elements.
By default, the ThemeProvider will apply styles in styles.global globally and styles.root to the <body> element.
theme.jsexport default {...styles: {// Applies globally.global: {a: {cursor: "pointer",}},// Applies to the `body` element.root: {m: 0,p: 0,}}...}