katoikia-app/mobile-ui/App.js

import React from "react";
import {
  Text,
  Link,
  HStack,
  Center,
  Heading,
  Switch,
  useColorMode,
  NativeBaseProvider,
  extendTheme,
  VStack,
  Box,
  FormControl,
  Input,
  Button,
} from "native-base";
import NativeBaseIcon from "./components/NativeBaseIcon";
import { Platform } from "react-native";

// Define the config
const config = {
  useSystemColorMode: false,
  initialColorMode: "dark",
};

// extend the theme
export const theme = extendTheme({ config });

export default function App() {
  return (
    <NativeBaseProvider>
      <Center w="100%">
        <Box safeArea p="2" py="8" w="90%" maxW="290">
          <Heading
            size="lg"
            fontWeight="600"
            color="coolGray.800"
            _dark={{
              color: "warmGray.50",
            }}
          >
            Welcome To Katoikia 
          </Heading>
          <Heading
            mt="1"
            _dark={{
              color: "warmGray.200",
            }}
            color="coolGray.600"
            fontWeight="medium"
            size="xs"
          >
             Sign in to continue!
          </Heading>

          <VStack space={3} mt="5">
            <FormControl>
              <FormControl.Label> Email ID</FormControl.Label>
              <Input />
            </FormControl>
            <FormControl>
              <FormControl.Label> Password </FormControl.Label>
              <Input type="password" />
              <Link
                _text={{
                  fontSize: "xs",
                  fontWeight: "500",
                  color: "indigo.500",
                }}
                alignSelf="flex-end"
                mt="1"
              >
                  Forget Password? 
               
              </Link>
            </FormControl>
            <Button mt="2" colorScheme="indigo">
              <Text>Sign in </Text>
            </Button>
            <HStack mt="6" justifyContent="center">
              <Text
                fontSize="sm"
                color="coolGray.600"
                _dark={{
                  color: "warmGray.200",
                }}
              >
                I'm a new user.
              </Text>
              <Link
                _text={{
                  color: "indigo.500",
                  fontWeight: "medium",
                  fontSize: "sm",
                }}
                href="#"
              >
                 Sign Up
              </Link>
            </HStack>
          </VStack>
        </Box>
      </Center>
      
    </NativeBaseProvider>
  );
}

// Color Switch Component
function ToggleDarkMode() {
  const { colorMode, toggleColorMode } = useColorMode();
  return (
    <HStack space={2} alignItems="center">
      <Text>Dark</Text>
      <Switch
        isChecked={colorMode === "light"}
        onToggle={toggleColorMode}
        aria-label={
          colorMode === "light" ? "switch to dark mode" : "switch to light mode"
        }
      />
      <Text>Light</Text>
    </HStack>
  );
}