.product-add-to-cart .control-label,
.product-add-to-cart .product-quantity {
   display: none;
}

.od_outofstock_button a, .od_outofstock_button button {
   background-color: #7d7d7d;
   font-weight: 700;
   font-size: 14px;
   color: white;
}

.od_outofstock_button button:hover {
   background-color: #f88b8e;
}