JSFiddle - React, Tailwind, and code Playground

CSS

<?php
/**
 * The Header template for our theme
 *
 * Displays all of the <head> section and everything up till <div id="main">
 *
 * @package i-excel
 * @since i-excel 1.0
 */
?>
<?php

$bg_style = '';
$top_phone = '8 (926) 269-03-03';
$top_email = 'oknabest03@mail.ru';


$iexcel_logo = get_theme_mod( 'logo', get_template_directory_uri().'/images/logo.png' );


global $post; 

?>

<!DOCTYPE html>
<html <?php language_attributes(); ?>>
<head>


	<meta charset="<?php bloginfo( 'charset' ); ?>">
	<meta name="viewport" content="width=device-width">
	<?php    
    if ( ! function_exists( '_wp_render_title_tag' ) ) :
        function iexcel_render_title() {
    ?>
    <title>z-index</title>
    <?php
        }
        add_action( 'wp_head', 'iexcel_render_title' );
    endif;    
    ?> 	<link rel="profile" href="http://gmpg.org/xfn/11">
	<link rel="pingback" href="<?php bloginfo( 'pingback_url' ); ?>">
	<?php wp_head(); ?>
</head>

<body <?php body_class(); ?> style=" <?php echo $bg_style; ?> ">
	<div id="page" class="hfeed site">
    	
        <?php if ( $top_email || $top_phone || iexcel_social_icons() ) : ?>
    	<div id="utilitybar" class="utilitybar">
        	
<div class="ubarinnerwrap">

 <button class="eModal-3">Обратный звонок</button>
    <button class="eModal-5">Написать сообщение</button>
 

<div class="socialicons">
                    <?php echo iexcel_social_icons(); ?>
                </div>
                <?php if ( !empty($top_phone) ) : ?>
                <div class="topphone">
                    <i class="topbarico genericon genericon-phone"></i>
                    <?php _e('Call us : ','i-excel'); ?> <?php echo esc_attr($top_phone); ?>
                </div>
                <?php endif; ?>
                
                <?php if ( !empty($top_email) ) : ?>
                <div class="topphone">
                    <i class="topbarico genericon genericon-mail"></i>
                    <?php _e('Mail us : ','i-excel'); ?> <?php echo...