Google font not show

Google font

<?php 

function canon_hash_custom_css() {
	

	
	$body_font  = cs_get_option('body_font');
	$body_font_size  = cs_get_option('body_font_size');
	
	
	$heading_font   = cs_get_option('heading_font');
	$heading_font_variants_array = cs_get_option('heading_font_variants');
	$heading_font_variants = implode(',',$heading_font_variants_array);
	$defferent_heading_font   = cs_get_option('defferent_heading_font');
	
	
	
    if (!empty($body_font)){
		
	    $body_font_family  = $body_font['family'];
		
	} else {
		
	   $body_font_family  = 'Cousine';

	}
		
		
	if (!empty($heading_font)){
		
	    $heading_font_family  = $heading_font['family'];
		
	} else {
		
	   $heading_font_family  = 'Cousine';

	}
	
	
	
		
	wp_enqueue_style(
		'canon-hash-custom',
		get_template_directory_uri() . '/assets/css/custom.css'
	);

    
	$custom_css = '';
	$custom_css .= '
	
	body {font-family: '.esc_html($body_font_family).';font-size: '.esc_attr($body_font_size).';font-weight: '.$body_font['variant'].'}
	';
	
		
	if ($defferent_heading_font == true) {
	$custom_css .= 'h1,h2,h3,h4,h5,h6 {font-family: '.esc_html($heading_font_family).';font-weight: '.$heading_font['variant'].'}';
    }
	
	
	
    wp_add_inline_style( 'canon-hash-custom', $custom_css );
}
add_action( 'wp_enqueue_scripts', 'canon_hash_custom_css' );
?>