This code works in WoodMart Theme if you use any other theme then need to change class according to theme

				
					/* For Desktop */
.woodmart-sticky-btn-cart .cart .wsb-button{
	margin-bottom:0px !important;
}

/* For Mobile */
.woodmart-sticky-btn-cart .cart .single_add_to_cart_button{
	width:60% !important;
}
.woodmart-sticky-btn-cart .cart .wsb-button{
	margin-left: 0px !important;
    width: 40% !important;
    border-radius: 0px !important;
}