#gd-checkout {
  width: 0;
  height: 0;
  overflow: hidden;
  z-index: -1;
  position: fixed;
  background-color: #fff;
  transition: transform 200ms, opacity 200ms;
  opacity: 0;
  overflow-y: scroll;
}
#gd-checkout.checkout-open {
  width: 100%;
  height: 100%;
  z-index: 999999;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  opacity: 1;
}

.woocommerce button.gd-checkout-button {
  background-color: #000;
  padding: 12px 16px;
  border-radius: 5px;
  color: #fff;
  width: 100%;
  text-align: center;
  display: block;
  overflow: hidden;
  margin: 10px auto;
}

.woocommerce button.gd-checkout-button:hover {
  background-color: #333;
  color: #fff;
}