index-shop/assets/css/components/_shopify-buy-button.scss

.product-purchase {
  margin-top: 2rem;
}

.product-stock-info {
  margin-bottom: 1rem;
}

.stock-status {
  font-size: 0.9rem;
  font-weight: 600;
  margin: 0;
}

.stock-status.in-stock {
  color: #00cc00;
}

.stock-status.low-stock {
  color: #ff9900;
}

.stock-status.out-of-stock {
  color: #ff3333;
}

.btn-add-to-cart {
  font-family: "Open Sans", sans-serif;
  font-weight: bold;
  font-size: 1rem;
  color: #000000;
  background-color: #00ff00;
  border: none;
  border-radius: 40px;
  padding: 12px 34px;
  cursor: pointer;
  transition: background-color 0.3s ease;
  width: 100%;
  max-width: 300px;
}

.btn-add-to-cart:hover:not(:disabled) {
  background-color: #00e600;
}

.btn-add-to-cart:focus {
  outline: 2px solid #00e600;
  outline-offset: 2px;
}

.btn-add-to-cart:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-add-to-cart.success {
  background-color: #00cc00;
}

.btn-add-to-cart.error {
  background-color: #ff3333;
  color: #ffffff;
}

.btn-add-to-cart.out-of-stock {
  background-color: #cccccc;
  color: #666666;
}