How can I override CSSfor material UI TextField component? - material-ui

Question

I am using Material UI's Autocomplete/TextField and I want to override its default CSS on hover and when the text field is in focus state.
Default CSS:
Image for default CSS in focused state
I want to change this blue colour when input box is in focus state.
I have tried using ThemeProvider/createTheme hook but it is not helping. Below is the code for createTheme:
import { ThemeProvider, createTheme } from "#mui/material/styles";
const overrideTheme = createTheme({
overrides: {
MuiInput: {
root: {
"&$focused": {
borderColor: "red",
},
},
},
},
});
export default function AutocompleteComponent() {
return (
<ThemeProvider theme={overrideTheme}>
<Autocomplete
classes={classes}
freeSolo
id="free-solo-2-demo"
options={
autocompleteResult ? top100Films.map((option) => option.title) : []
}
renderInput={(params) => (
<TextField
variant="outlined"
{...params}
placeholder="Search..."
InputProps={{
...params.InputProps,
type: "search",
classes: {
root: classes.root,
notchedOutline: classes.notchedOutline,
},
className: classes.input,
endAdornment: false,
}}
/>
)}
/>
</ThemeProvider>
);
}

Answer 1

You have to use the browser dev tools to identify the slot for the component you want to override. Once that's done, you write a CSS file with the class you want to change.
To force the class you can use :
!important
file : styles.css
exemple:
.css-1q6at85-MuiInputBase-root-MuiOutlinedInput-root{
border-radius: 50px!important;
}