Customized Login page form in WordPress

login.php

<?php

// Customized login page
function theme_prefix_custom_login_page() {
	$custom_logo_id = get_theme_mod( 'custom_logo' ); // image from cusomizer logo
	$image = wp_get_attachment_image_src( $custom_logo_id , 'full' );
	$bg = get_stylesheet_directory_uri() . '/images/bg.jpg'; // change url to your preferred image 
	?>
		<style type="text/css">
			body.login {
				background: url('<?php echo $bg; ?>') no-repeat center;
				background-size: cover;
				background-attachment: fixed;
				display: grid;
				align-content: center;
			}
			
			body.login div#login h1 a {
				background: url('<?php echo $image['0']; ?>') no-repeat center;
				background-size: 100%;
				width: 320px;
			}
			
			body.login div#login {
				background-color: rgba(255,255,255,0.8);
				margin: 40px auto;
				padding: 30px;
				border: 1px solid #ddd;
				border-radius: 3px;
			}
			
			body.login div#login .privacy-policy-page-link {
				text-align: center;
				width: 100%;
				margin: 1em 0 1em!important;
			}
		</style>
	<?php
}
add_action('login_enqueue_scripts','theme_prefix_custom_login_page');