add_action( 'wp_head', function () { ?>
<style>

.btn-rond a {
	 margin: 20px auto;
	 border: none;
	 padding: 10px 44px;
	 font-size: 36px;
	 position: relative;
	 background: transparent;
}
 .btn-rond a::before {
	 transition: all 0.85s cubic-bezier(0.68, -0.55, 0.265, 1.55);
	 content: '';
	 width: 50%;
	 height: 100%;
	 background: black;
	 position: absolute;
	 top: 0;
	 left: 0;
}
.btn-rond a span {
	 color: white;
	 mix-blend-mode: difference;
}
 .btn-rond a:hover:before {
	 background: black;
	 width: 100%;
} 

 .btn-rond a {
	 border-radius: 50px;
}
 .btn-rond a span {
	 color: var(--e-global-color-secondary);
	 mix-blend-mode: difference;
}
 .btn-rond a::before {
	 border-radius: 50px;
	 width: 25%;
	 background: var(--e-global-color-secondary);
}
 .btn-rond a:hover::before {
	 background: var(--e-global-color-primary);
	 width: 100%;
}

</style>
<?php } );
