diff --git a/.env b/.env
index d45c67a..c4ee18d 100644
--- a/.env
+++ b/.env
@@ -63,4 +63,7 @@ FILE_MAAL_PL_PASSWORD=1FnwqcEgIUjQHjt1
 IMAGE_PREFIX=https://www.naluconcept.com # remove prefix to serv them from same host as presta
 CORS_ORGIN=https://www.naluconcept.com
 
-DSN=root:Maal12345678@tcp(localhost:3306)/nalu
\ No newline at end of file
+DSN=root:Maal12345678@tcp(localhost:3306)/nalu
+
+LOG_LEVEL=warn
+LOG_COLORIZE=true
\ No newline at end of file
diff --git a/app/cmd/cmds/startServer.go b/app/cmd/cmds/startServer.go
index c23d8b2..44c3adf 100644
--- a/app/cmd/cmds/startServer.go
+++ b/app/cmd/cmds/startServer.go
@@ -4,8 +4,11 @@ import (
 	"log"
 	"os"
 
+	"git.ma-al.com/goc_daniel/b2b/app/config"
 	"git.ma-al.com/goc_daniel/b2b/app/delivery/web"
+
 	"git.ma-al.com/goc_daniel/b2b/app/service/langsService"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/version"
 	"github.com/spf13/cobra"
 )
@@ -21,6 +24,8 @@ var (
 				return
 			}
 
+			logger.Init("b2b", nil, config.Get().Log.LogLevel, config.Get().Log.LogColorize)
+
 			// Create and setup the server
 			server := web.New()
 
diff --git a/app/config/config.go b/app/config/config.go
index 1963d38..16cb64b 100644
--- a/app/config/config.go
+++ b/app/config/config.go
@@ -28,6 +28,7 @@ type Config struct {
 	Cors            CorsConfig
 	MeiliSearch     MeiliSearchConfig
 	Storage         StorageConfig
+	Log             LogConfig
 }
 
 type I18n struct {
@@ -87,6 +88,11 @@ type AppConfig struct {
 	BaseURL     string `env:"APP_BASE_URL,http://localhost:5173"`
 }
 
+type LogConfig struct {
+	LogLevel    string `env:"LOG_LEVEL,warn"`
+	LogColorize bool   `env:"LOG_COLORIZE,true"`
+}
+
 type EmailConfig struct {
 	SMTPHost     string `env:"EMAIL_SMTP_HOST,localhost"`
 	SMTPPort     int    `env:"EMAIL_SMTP_PORT,587"`
@@ -209,6 +215,11 @@ func load() *Config {
 	if err != nil {
 		slog.Error("not possible to load env variables for storage : ", err.Error(), "")
 	}
+
+	err = loadEnv(&cfg.Log)
+	if err != nil {
+		slog.Error("not possible to load env variables for logger : ", err.Error(), "")
+	}
 	cfg.Storage.RootFolder = ResolveRelativePath(cfg.Storage.RootFolder)
 
 	return cfg
diff --git a/app/delivery/web/api/public/auth.go b/app/delivery/web/api/public/auth.go
index 527a587..7492e1d 100644
--- a/app/delivery/web/api/public/auth.go
+++ b/app/delivery/web/api/public/auth.go
@@ -1,7 +1,6 @@
 package public
 
 import (
-	"log"
 	"strconv"
 	"time"
 
@@ -11,6 +10,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/service/authService"
 	constdata "git.ma-al.com/goc_daniel/b2b/app/utils/const_data"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -178,7 +178,13 @@ func (h *AuthHandler) ForgotPassword(c fiber.Ctx) error {
 	// Request password reset - always return success to prevent email enumeration
 	err := h.authService.RequestPasswordReset(req.Email)
 	if err != nil {
-		log.Printf("Password reset request error: %v", err)
+
+		logger.Warn("password reset request failed",
+			"handler", "AuthHandler.ForgotPassword",
+
+			"email", req.Email,
+			"error", err.Error(),
+		)
 	}
 
 	return c.JSON(fiber.Map{
@@ -307,7 +313,6 @@ func (h *AuthHandler) Register(c fiber.Ctx) error {
 	// Attempt registration
 	err := h.authService.Register(&req)
 	if err != nil {
-		log.Printf("Register error: %v", err)
 		return c.Status(responseErrors.GetErrorStatus(err)).JSON(fiber.Map{
 			"error": responseErrors.GetErrorCode(c, err),
 		})
@@ -447,7 +452,6 @@ func (h *AuthHandler) GoogleCallback(c fiber.Ctx) error {
 
 	response, rawRefreshToken, err := h.authService.HandleGoogleCallback(code)
 	if err != nil {
-		log.Printf("Google OAuth callback error: %v", err)
 		return c.Status(responseErrors.GetErrorStatus(err)).JSON(fiber.Map{
 			"error": responseErrors.GetErrorCode(c, err),
 		})
diff --git a/app/delivery/web/api/restricted/addresses.go b/app/delivery/web/api/restricted/addresses.go
index f33b7cb..2b00324 100644
--- a/app/delivery/web/api/restricted/addresses.go
+++ b/app/delivery/web/api/restricted/addresses.go
@@ -6,6 +6,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/service/addressesService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/localeExtractor"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -45,6 +46,13 @@ func (h *AddressesHandler) GetTemplate(c fiber.Ctx) error {
 
 	template, err := h.addressesService.GetTemplate(uint(country_id))
 	if err != nil {
+
+		logger.Error("failed to get address template",
+			"handler", "AddressesHandler.GetTemplate",
+
+			"country_id", country_id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -74,6 +82,13 @@ func (h *AddressesHandler) AddNewAddress(c fiber.Ctx) error {
 
 	err = h.addressesService.AddNewAddress(userID, address_info, uint(country_id))
 	if err != nil {
+
+		logger.Error("failed to add new address",
+			"handler", "AddressesHandler.AddNewAddress",
+
+			"user_id", userID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -110,6 +125,14 @@ func (h *AddressesHandler) ModifyAddress(c fiber.Ctx) error {
 
 	err = h.addressesService.ModifyAddress(userID, uint(address_id), address_info, uint(country_id))
 	if err != nil {
+
+		logger.Error("failed to modify address",
+			"handler", "AddressesHandler.ModifyAddress",
+
+			"user_id", userID,
+			"address_id", address_id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -126,6 +149,13 @@ func (h *AddressesHandler) RetrieveAddressesInfo(c fiber.Ctx) error {
 
 	addresses, err := h.addressesService.RetrieveAddresses(userID)
 	if err != nil {
+
+		logger.Error("failed to retrieve addresses",
+			"handler", "AddressesHandler.RetrieveAddressesInfo",
+
+			"user_id", userID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -149,6 +179,14 @@ func (h *AddressesHandler) DeleteAddress(c fiber.Ctx) error {
 
 	err = h.addressesService.DeleteAddress(userID, uint(address_id))
 	if err != nil {
+
+		logger.Error("failed to delete address",
+			"handler", "AddressesHandler.DeleteAddress",
+
+			"user_id", userID,
+			"address_id", address_id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
diff --git a/app/delivery/web/api/restricted/carts.go b/app/delivery/web/api/restricted/carts.go
index 6118af2..abd55c0 100644
--- a/app/delivery/web/api/restricted/carts.go
+++ b/app/delivery/web/api/restricted/carts.go
@@ -6,6 +6,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/service/cartsService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/localeExtractor"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -49,6 +50,13 @@ func (h *CartsHandler) AddNewCart(c fiber.Ctx) error {
 	name := c.Query("name")
 	new_cart, err := h.cartsService.CreateNewCart(userID, name)
 	if err != nil {
+
+		logger.Error("failed to create cart",
+			"handler", "CartsHandler.AddNewCart",
+
+			"user_id", userID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -72,6 +80,14 @@ func (h *CartsHandler) RemoveCart(c fiber.Ctx) error {
 
 	err = h.cartsService.RemoveCart(userID, uint(cart_id))
 	if err != nil {
+
+		logger.Error("failed to remove cart",
+			"handler", "CartsHandler.RemoveCart",
+
+			"user_id", userID,
+			"cart_id", cart_id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -97,6 +113,14 @@ func (h *CartsHandler) ChangeCartName(c fiber.Ctx) error {
 
 	err = h.cartsService.UpdateCartName(userID, uint(cart_id), new_name)
 	if err != nil {
+
+		logger.Error("failed to update cart name",
+			"handler", "CartsHandler.ChangeCartName",
+
+			"user_id", userID,
+			"cart_id", cart_id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -113,6 +137,13 @@ func (h *CartsHandler) RetrieveCartsInfo(c fiber.Ctx) error {
 
 	carts_info, err := h.cartsService.RetrieveCartsInfo(userID)
 	if err != nil {
+
+		logger.Error("failed to retrieve carts info",
+			"handler", "CartsHandler.RetrieveCartsInfo",
+
+			"user_id", userID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -136,6 +167,14 @@ func (h *CartsHandler) RetrieveCart(c fiber.Ctx) error {
 
 	cart, err := h.cartsService.RetrieveCart(userID, uint(cart_id))
 	if err != nil {
+
+		logger.Error("failed to retrieve cart",
+			"handler", "CartsHandler.RetrieveCart",
+
+			"user_id", userID,
+			"cart_id", cart_id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -195,6 +234,15 @@ func (h *CartsHandler) AddProduct(c fiber.Ctx) error {
 
 	err = h.cartsService.AddProduct(userID, uint(cart_id), uint(product_id), product_attribute_id, amount, set_amount)
 	if err != nil {
+
+		logger.Error("failed to add product to cart",
+			"handler", "CartsHandler.AddProduct",
+
+			"user_id", userID,
+			"cart_id", cart_id,
+			"product_id", product_id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -240,6 +288,15 @@ func (h *CartsHandler) RemoveProduct(c fiber.Ctx) error {
 
 	err = h.cartsService.RemoveProduct(userID, uint(cart_id), uint(product_id), product_attribute_id)
 	if err != nil {
+
+		logger.Error("failed to remove product from cart",
+			"handler", "CartsHandler.RemoveProduct",
+
+			"user_id", userID,
+			"cart_id", cart_id,
+			"product_id", product_id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
diff --git a/app/delivery/web/api/restricted/currency.go b/app/delivery/web/api/restricted/currency.go
index d3bda40..10a08d3 100644
--- a/app/delivery/web/api/restricted/currency.go
+++ b/app/delivery/web/api/restricted/currency.go
@@ -9,6 +9,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/model"
 	"git.ma-al.com/goc_daniel/b2b/app/service/currencyService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -46,6 +47,12 @@ func (h *CurrencyHandler) PostCurrencyRate(c fiber.Ctx) error {
 
 	err := h.CurrencyService.CreateCurrencyRate(&currencyRate)
 	if err != nil {
+
+		logger.Error("failed to create currency rate",
+			"handler", "CurrencyHandler.PostCurrencyRate",
+
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -63,6 +70,13 @@ func (h *CurrencyHandler) GetCurrencyRate(c fiber.Ctx) error {
 
 	currency, err := h.CurrencyService.GetCurrency(uint(id))
 	if err != nil {
+
+		logger.Error("failed to get currency",
+			"handler", "CurrencyHandler.GetCurrencyRate",
+
+			"currency_id", id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
 
diff --git a/app/delivery/web/api/restricted/customer.go b/app/delivery/web/api/restricted/customer.go
index 9d15c11..030c82d 100644
--- a/app/delivery/web/api/restricted/customer.go
+++ b/app/delivery/web/api/restricted/customer.go
@@ -9,6 +9,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/service/customerService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/localeExtractor"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/query/query_params"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
@@ -64,6 +65,13 @@ func (h *customerHandler) customerData(fc fiber.Ctx) error {
 
 	customer, err := h.service.GetById(customerId)
 	if err != nil {
+
+		logger.Error("failed to get customer",
+			"handler", "customerHandler.customerData",
+
+			"customer_id", customerId,
+			"error", err.Error(),
+		)
 		return fc.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(fc, err)))
 	}
@@ -88,6 +96,12 @@ func (h *customerHandler) listCustomers(fc fiber.Ctx) error {
 
 	customer, err := h.service.Find(user.LangID, p, filt, search)
 	if err != nil {
+
+		logger.Error("failed to list customers",
+			"handler", "customerHandler.listCustomers",
+
+			"error", err.Error(),
+		)
 		return fc.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(fc, err)))
 	}
@@ -120,6 +134,13 @@ func (h *customerHandler) setCustomerNoVatStatus(fc fiber.Ctx) error {
 	}
 
 	if err := h.service.SetCustomerNoVatStatus(req.CustomerID, req.IsNoVat); err != nil {
+
+		logger.Error("failed to set customer no vat status",
+			"handler", "customerHandler.setCustomerNoVatStatus",
+
+			"customer_id", req.CustomerID,
+			"error", err.Error(),
+		)
 		return fc.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(fc, err)))
 	}
diff --git a/app/delivery/web/api/restricted/localeSelector.go b/app/delivery/web/api/restricted/localeSelector.go
index 8131501..d385643 100644
--- a/app/delivery/web/api/restricted/localeSelector.go
+++ b/app/delivery/web/api/restricted/localeSelector.go
@@ -3,6 +3,7 @@ package restricted
 import (
 	"git.ma-al.com/goc_daniel/b2b/app/service/localeSelectorService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -34,6 +35,12 @@ func LocaleSelectorHandlerRoutes(r fiber.Router) fiber.Router {
 func (h *LocaleSelectorHandler) GetLanguages(c fiber.Ctx) error {
 	languages, err := h.localeSelectorService.GetLanguages()
 	if err != nil {
+
+		logger.Error("failed to get languages",
+			"handler", "LocaleSelectorHandler.GetLanguages",
+
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -44,6 +51,12 @@ func (h *LocaleSelectorHandler) GetLanguages(c fiber.Ctx) error {
 func (h *LocaleSelectorHandler) GetCountries(c fiber.Ctx) error {
 	countries, err := h.localeSelectorService.GetCountriesAndCurrencies()
 	if err != nil {
+
+		logger.Error("failed to get countries",
+			"handler", "LocaleSelectorHandler.GetCountries",
+
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
diff --git a/app/delivery/web/api/restricted/menu.go b/app/delivery/web/api/restricted/menu.go
index 8114e9c..959d288 100644
--- a/app/delivery/web/api/restricted/menu.go
+++ b/app/delivery/web/api/restricted/menu.go
@@ -6,6 +6,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/service/menuService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/localeExtractor"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -49,6 +50,12 @@ func (h *MenuHandler) GetCategoryTree(c fiber.Ctx) error {
 
 	category_tree, err := h.menuService.GetCategoryTree(uint(root_category_id), lang_id)
 	if err != nil {
+
+		logger.Error("failed to get category tree",
+			"handler", "MenuHandler.GetCategoryTree",
+
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -79,6 +86,12 @@ func (h *MenuHandler) GetBreadcrumb(c fiber.Ctx) error {
 
 	breadcrumb, err := h.menuService.GetBreadcrumb(uint(root_category_id), uint(category_id), lang_id)
 	if err != nil {
+
+		logger.Error("failed to get breadcrumb",
+			"handler", "MenuHandler.GetBreadcrumb",
+
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -94,6 +107,12 @@ func (h *MenuHandler) GetTopMenu(c fiber.Ctx) error {
 	}
 	menu, err := h.menuService.GetTopMenu(customer.LangID, customer.RoleID)
 	if err != nil {
+
+		logger.Error("failed to get top menu",
+			"handler", "MenuHandler.GetTopMenu",
+
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
diff --git a/app/delivery/web/api/restricted/orders.go b/app/delivery/web/api/restricted/orders.go
index 652d9d2..679ec1a 100644
--- a/app/delivery/web/api/restricted/orders.go
+++ b/app/delivery/web/api/restricted/orders.go
@@ -7,6 +7,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/service/orderService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/localeExtractor"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/query/query_params"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
@@ -53,6 +54,12 @@ func (h *OrdersHandler) ListOrders(c fiber.Ctx) error {
 
 	list, err := h.ordersService.Find(user, paging, filters)
 	if err != nil {
+
+		logger.Error("failed to list orders",
+			"handler", "OrdersHandler.ListOrders",
+
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -104,6 +111,13 @@ func (h *OrdersHandler) PlaceNewOrder(c fiber.Ctx) error {
 
 	err = h.ordersService.PlaceNewOrder(userID, uint(cart_id), name, uint(country_id), address_info)
 	if err != nil {
+
+		logger.Error("failed to place order",
+			"handler", "OrdersHandler.PlaceNewOrder",
+
+			"user_id", userID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -141,6 +155,13 @@ func (h *OrdersHandler) ChangeOrderAddress(c fiber.Ctx) error {
 
 	err = h.ordersService.ChangeOrderAddress(user, uint(order_id), uint(country_id), address_info)
 	if err != nil {
+
+		logger.Error("failed to change order address",
+			"handler", "OrdersHandler.ChangeOrderAddress",
+
+			"order_id", order_id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -168,6 +189,13 @@ func (h *OrdersHandler) ChangeOrderStatus(c fiber.Ctx) error {
 
 	err = h.ordersService.ChangeOrderStatus(user, uint(order_id), status)
 	if err != nil {
+
+		logger.Error("failed to change order status",
+			"handler", "OrdersHandler.ChangeOrderStatus",
+
+			"order_id", order_id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
diff --git a/app/delivery/web/api/restricted/product.go b/app/delivery/web/api/restricted/product.go
index 9e58550..f6b33ac 100644
--- a/app/delivery/web/api/restricted/product.go
+++ b/app/delivery/web/api/restricted/product.go
@@ -9,6 +9,7 @@ import (
 	constdata "git.ma-al.com/goc_daniel/b2b/app/utils/const_data"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/localeExtractor"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/query/query_params"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
@@ -74,6 +75,15 @@ func (h *ProductsHandler) GetProductJson(c fiber.Ctx) error {
 	}
 	productJson, err := h.productService.Get(uint(p_id_product), customer.LangID, customer.ID, uint(b2b_id_country), uint(p_quantity))
 	if err != nil {
+		logger.Error("failed to get product",
+			"handler", "ProductsHandler.GetProductJson",
+			"product_id", p_id_product,
+			"lang_id", customer.LangID,
+			"customer_id", customer.ID,
+			"b2b_id_country", b2b_id_country,
+			"quantity", p_quantity,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -96,6 +106,13 @@ func (h *ProductsHandler) ListProducts(c fiber.Ctx) error {
 
 	list, err := h.productService.Find(customer.LangID, customer.ID, paging, filters, customer, constdata.DEFAULT_PRODUCT_QUANTITY, constdata.SHOP_ID)
 	if err != nil {
+
+		logger.Error("failed to list products",
+			"handler", "ProductsHandler.ListProducts",
+			"lang_id", customer.LangID,
+			"customer_id", customer.ID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -132,6 +149,13 @@ func (h *ProductsHandler) AddToFavorites(c fiber.Ctx) error {
 
 	err = h.productService.AddToFavorites(userID, uint(productID))
 	if err != nil {
+
+		logger.Error("failed to add to favorites",
+			"handler", "ProductsHandler.AddToFavorites",
+			"user_id", userID,
+			"product_id", productID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -156,6 +180,12 @@ func (h *ProductsHandler) RemoveFromFavorites(c fiber.Ctx) error {
 
 	err = h.productService.RemoveFromFavorites(userID, uint(productID))
 	if err != nil {
+		logger.Error("failed to remove from favorites",
+			"handler", "ProductsHandler.RemoveFromFavorites",
+			"user_id", userID,
+			"product_id", productID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -180,6 +210,15 @@ func (h *ProductsHandler) ListProductVariants(c fiber.Ctx) error {
 
 	list, err := h.productService.GetProductAttributes(customer.LangID, uint(productID), constdata.SHOP_ID, customer.ID, customer.CountryID, constdata.DEFAULT_PRODUCT_QUANTITY)
 	if err != nil {
+
+		logger.Error("failed to list product variants",
+			"handler", "ProductsHandler.ListProductVariants",
+			"product_id", productID,
+			"customer_id", customer.ID,
+			"lang_id", customer.LangID,
+			"country_id", customer.CountryID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
diff --git a/app/delivery/web/api/restricted/productTranslation.go b/app/delivery/web/api/restricted/productTranslation.go
index eb3fee1..0709e78 100644
--- a/app/delivery/web/api/restricted/productTranslation.go
+++ b/app/delivery/web/api/restricted/productTranslation.go
@@ -9,6 +9,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/service/productTranslationService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/localeExtractor"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -66,6 +67,13 @@ func (h *ProductTranslationHandler) GetProductDescription(c fiber.Ctx) error {
 
 	description, err := h.productTranslationService.GetProductDescription(userID, uint(productID), uint(productLangID))
 	if err != nil {
+
+		logger.Error("failed to get product description",
+			"handler", "ProductTranslationHandler.GetProductDescription",
+
+			"product_id", productID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -103,6 +111,13 @@ func (h *ProductTranslationHandler) SaveProductDescription(c fiber.Ctx) error {
 
 	err = h.productTranslationService.SaveProductDescription(userID, uint(productID), uint(productLangID), updates)
 	if err != nil {
+
+		logger.Error("failed to save product description",
+			"handler", "ProductTranslationHandler.SaveProductDescription",
+
+			"product_id", productID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -147,6 +162,13 @@ func (h *ProductTranslationHandler) TranslateProductDescription(c fiber.Ctx) err
 
 	description, err := h.productTranslationService.TranslateProductDescription(userID, uint(productID), uint(productFromLangID), uint(productToLangID), aiModel)
 	if err != nil {
+
+		logger.Error("failed to translate product description",
+			"handler", "ProductTranslationHandler.TranslateProductDescription",
+
+			"product_id", productID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
diff --git a/app/delivery/web/api/restricted/search.go b/app/delivery/web/api/restricted/search.go
index ebb3a76..d7ed61a 100644
--- a/app/delivery/web/api/restricted/search.go
+++ b/app/delivery/web/api/restricted/search.go
@@ -2,7 +2,6 @@ package restricted
 
 import (
 	"encoding/json"
-	"fmt"
 
 	"git.ma-al.com/goc_daniel/b2b/app/delivery/middleware"
 	"git.ma-al.com/goc_daniel/b2b/app/delivery/middleware/perms"
@@ -10,6 +9,7 @@ import (
 	searchservice "git.ma-al.com/goc_daniel/b2b/app/service/searchService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/localeExtractor"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -47,7 +47,13 @@ func (h *MeiliSearchHandler) CreateIndex(c fiber.Ctx) error {
 
 	err := h.meiliService.CreateIndex(id_lang)
 	if err != nil {
-		fmt.Printf("CreateIndex error: %v\n", err)
+
+		logger.Error("failed to create search index",
+			"handler", "MeiliSearchHandler.CreateIndex",
+
+			"lang_id", id_lang,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -72,6 +78,13 @@ func (h *MeiliSearchHandler) Search(c fiber.Ctx) error {
 
 	result, err := h.searchService.Search(index, c.Body(), id_lang)
 	if err != nil {
+
+		logger.Error("failed to search",
+			"handler", "MeiliSearchHandler.Search",
+
+			"index", index,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -80,6 +93,13 @@ func (h *MeiliSearchHandler) Search(c fiber.Ctx) error {
 		if createErr := h.meiliService.CreateIndex(id_lang); createErr == nil {
 			result, err = h.searchService.Search(index, c.Body(), id_lang)
 			if err != nil {
+
+				logger.Error("failed to search after index creation",
+					"handler", "MeiliSearchHandler.Search",
+
+					"index", index,
+					"error", err.Error(),
+				)
 				return c.Status(responseErrors.GetErrorStatus(err)).
 					JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 			}
@@ -100,6 +120,13 @@ func (h *MeiliSearchHandler) GetSettings(c fiber.Ctx) error {
 
 	result, err := h.searchService.GetIndexSettings(index)
 	if err != nil {
+
+		logger.Error("failed to get index settings",
+			"handler", "MeiliSearchHandler.GetSettings",
+
+			"index", index,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
diff --git a/app/delivery/web/api/restricted/specificPrice.go b/app/delivery/web/api/restricted/specificPrice.go
index e007f57..b25ba46 100644
--- a/app/delivery/web/api/restricted/specificPrice.go
+++ b/app/delivery/web/api/restricted/specificPrice.go
@@ -9,6 +9,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/model"
 	"git.ma-al.com/goc_daniel/b2b/app/service/specificPriceService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -51,6 +52,12 @@ func (h *SpecificPriceHandler) Create(c fiber.Ctx) error {
 
 	result, err := h.SpecificPriceService.Create(c.Context(), &pr)
 	if err != nil {
+
+		logger.Error("failed to create specific price",
+			"handler", "SpecificPriceHandler.Create",
+
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -74,6 +81,13 @@ func (h *SpecificPriceHandler) Update(c fiber.Ctx) error {
 
 	result, err := h.SpecificPriceService.Update(c.Context(), id, &pr)
 	if err != nil {
+
+		logger.Error("failed to update specific price",
+			"handler", "SpecificPriceHandler.Update",
+
+			"specific_price_id", id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -84,6 +98,12 @@ func (h *SpecificPriceHandler) Update(c fiber.Ctx) error {
 func (h *SpecificPriceHandler) List(c fiber.Ctx) error {
 	result, err := h.SpecificPriceService.List(c.Context())
 	if err != nil {
+
+		logger.Error("failed to list specific prices",
+			"handler", "SpecificPriceHandler.List",
+
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -101,6 +121,13 @@ func (h *SpecificPriceHandler) GetByID(c fiber.Ctx) error {
 
 	result, err := h.SpecificPriceService.GetByID(c.Context(), id)
 	if err != nil {
+
+		logger.Error("failed to get specific price",
+			"handler", "SpecificPriceHandler.GetByID",
+
+			"specific_price_id", id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -118,6 +145,13 @@ func (h *SpecificPriceHandler) Activate(c fiber.Ctx) error {
 
 	err = h.SpecificPriceService.SetActive(c.Context(), id, true)
 	if err != nil {
+
+		logger.Error("failed to activate specific price",
+			"handler", "SpecificPriceHandler.Activate",
+
+			"specific_price_id", id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -135,6 +169,13 @@ func (h *SpecificPriceHandler) Deactivate(c fiber.Ctx) error {
 
 	err = h.SpecificPriceService.SetActive(c.Context(), id, false)
 	if err != nil {
+
+		logger.Error("failed to deactivate specific price",
+			"handler", "SpecificPriceHandler.Deactivate",
+
+			"specific_price_id", id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -152,6 +193,13 @@ func (h *SpecificPriceHandler) Delete(c fiber.Ctx) error {
 
 	err = h.SpecificPriceService.Delete(c.Context(), id)
 	if err != nil {
+
+		logger.Error("failed to delete specific price",
+			"handler", "SpecificPriceHandler.Delete",
+
+			"specific_price_id", id,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
diff --git a/app/delivery/web/api/restricted/storage.go b/app/delivery/web/api/restricted/storage.go
index 1a252b0..29a5454 100644
--- a/app/delivery/web/api/restricted/storage.go
+++ b/app/delivery/web/api/restricted/storage.go
@@ -9,6 +9,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/service/storageService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/localeExtractor"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -52,6 +53,12 @@ func (h *StorageHandler) ListContent(c fiber.Ctx) error {
 	entries_in_list, err := h.storageService.ListContent(abs_path)
 
 	if err != nil {
+
+		logger.Error("failed to list storage content",
+			"handler", "StorageHandler.ListContent",
+			"path", abs_path,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -68,6 +75,12 @@ func (h *StorageHandler) DownloadFile(c fiber.Ctx) error {
 
 	f, filename, filesize, err := h.storageService.DownloadFilePrep(abs_path)
 	if err != nil {
+
+		logger.Error("failed to prepare file download",
+			"handler", "StorageHandler.DownloadFile",
+			"path", abs_path,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
@@ -87,6 +100,12 @@ func (h *StorageHandler) CreateNewWebdavToken(c fiber.Ctx) error {
 
 	new_token, err := h.storageService.NewWebdavToken(userID)
 	if err != nil {
+
+		logger.Error("failed to create webdav token",
+			"handler", "StorageHandler.CreateNewWebdavToken",
+			"user_id", userID,
+			"error", err.Error(),
+		)
 		return c.Status(responseErrors.GetErrorStatus(err)).
 			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
 	}
diff --git a/app/service/authService/auth.go b/app/service/authService/auth.go
index af971d5..3433697 100644
--- a/app/service/authService/auth.go
+++ b/app/service/authService/auth.go
@@ -15,6 +15,7 @@ import (
 	roleRepo "git.ma-al.com/goc_daniel/b2b/app/repos/rolesRepo"
 	"git.ma-al.com/goc_daniel/b2b/app/service/emailService"
 	constdata "git.ma-al.com/goc_daniel/b2b/app/utils/const_data"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
 
 	"github.com/dlclark/regexp2"
@@ -68,22 +69,47 @@ func (s *AuthService) Login(req *model.LoginRequest) (*model.AuthResponse, strin
 	// Find user by email
 	if err := s.db.Preload("Role.Permissions").Where("email = ?", req.Email).First(&user).Error; err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
+			logger.Info("login failed - invalid credentials",
+				"service", "AuthService.Login",
+				"email", req.Email,
+				"reason", "user not found",
+			)
 			return nil, "", responseErrors.ErrInvalidCredentials
 		}
+		logger.Error("login failed - database error",
+			"service", "AuthService.Login",
+			"email", req.Email,
+			"error", err.Error(),
+		)
 		return nil, "", fmt.Errorf("database error: %w", err)
 	}
 	// Check if user is active
 	if !user.IsActive {
+		logger.Info("login failed - user inactive",
+			"service", "AuthService.Login",
+			"email", req.Email,
+			"reason", "user account is inactive",
+		)
 		return nil, "", responseErrors.ErrUserInactive
 	}
 
 	// Check if email is verified
 	if !user.EmailVerified {
+		logger.Info("login failed - email not verified",
+			"service", "AuthService.Login",
+			"email", req.Email,
+			"reason", "email not verified",
+		)
 		return nil, "", responseErrors.ErrEmailNotVerified
 	}
 
 	// Verify password
 	if err := bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(req.Password)); err != nil {
+		logger.Info("login failed - invalid credentials",
+			"service", "AuthService.Login",
+			"email", req.Email,
+			"reason", "wrong password",
+		)
 		return nil, "", responseErrors.ErrInvalidCredentials
 	}
 
@@ -94,6 +120,11 @@ func (s *AuthService) Login(req *model.LoginRequest) (*model.AuthResponse, strin
 	if req.LangID != nil {
 		_, err := s.GetLangISOCode(*req.LangID)
 		if err != nil {
+			logger.Warn("login failed - invalid language ID",
+				"service", "AuthService.Login",
+				"email", req.Email,
+				"reason", "invalid language ID",
+			)
 			return nil, "", responseErrors.ErrBadLangID
 		}
 		user.LangID = *req.LangID
@@ -105,12 +136,22 @@ func (s *AuthService) Login(req *model.LoginRequest) (*model.AuthResponse, strin
 	// Generate access token (JWT)
 	accessToken, err := s.generateAccessToken(&user)
 	if err != nil {
+		logger.Error("login failed - token generation error",
+			"service", "AuthService.Login",
+			"email", req.Email,
+			"error", err.Error(),
+		)
 		return nil, "", fmt.Errorf("failed to generate access token: %w", err)
 	}
 
 	// Generate opaque refresh token and store in DB
 	rawRefreshToken, err := s.createRefreshToken(user.ID)
 	if err != nil {
+		logger.Error("login failed - refresh token creation error",
+			"service", "AuthService.Login",
+			"email", req.Email,
+			"error", err.Error(),
+		)
 		return nil, "", fmt.Errorf("failed to create refresh token: %w", err)
 	}
 
@@ -171,6 +212,11 @@ func (s *AuthService) Register(req *model.RegisterRequest) error {
 	}
 
 	if err := s.db.Create(&user).Error; err != nil {
+		logger.Error("registration failed - database error",
+			"service", "AuthService.Register",
+			"email", req.Email,
+			"error", err.Error(),
+		)
 		return fmt.Errorf("failed to create user: %w", err)
 	}
 
@@ -182,8 +228,11 @@ func (s *AuthService) Register(req *model.RegisterRequest) error {
 	}
 
 	if err := s.email.SendVerificationEmail(user.Email, user.EmailVerificationToken, baseURL, lang); err != nil {
-		// Log error but don't fail registration - user can request resend
-		_ = err
+		logger.Warn("failed to send verification email",
+			"service", "AuthService.Register",
+			"email", req.Email,
+			"error", err.Error(),
+		)
 	}
 
 	return nil
@@ -307,6 +356,10 @@ func (s *AuthService) ResetPassword(token, newPassword string) error {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return responseErrors.ErrInvalidResetToken
 		}
+		logger.Error("password reset failed - database error",
+			"service", "AuthService.ResetPassword",
+			"error", err.Error(),
+		)
 		return fmt.Errorf("database error: %w", err)
 	}
 
@@ -333,6 +386,10 @@ func (s *AuthService) ResetPassword(token, newPassword string) error {
 
 	user.Country = nil
 	if err := s.db.Save(&user).Error; err != nil {
+		logger.Error("password reset failed - database error",
+			"service", "AuthService.ResetPassword",
+			"error", err.Error(),
+		)
 		return fmt.Errorf("failed to update password: %w", err)
 	}
 
diff --git a/app/service/authService/google_oauth.go b/app/service/authService/google_oauth.go
index 9bcd5ce..c4cde1a 100644
--- a/app/service/authService/google_oauth.go
+++ b/app/service/authService/google_oauth.go
@@ -8,10 +8,12 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"strings"
 	"time"
 
 	"git.ma-al.com/goc_daniel/b2b/app/config"
 	"git.ma-al.com/goc_daniel/b2b/app/model"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
 	"git.ma-al.com/goc_daniel/b2b/app/view"
 	"golang.org/x/oauth2"
@@ -77,6 +79,13 @@ func (s *AuthService) HandleGoogleCallback(code string) (*model.AuthResponse, st
 	// Find or create user
 	user, err := s.findOrCreateGoogleUser(userInfo)
 	if err != nil {
+		if strings.Contains(err.Error(), "database") {
+			logger.Error("google oauth callback failed - database error",
+				"service", "AuthService.HandleGoogleCallback",
+				"email", userInfo.Email,
+				"error", err.Error(),
+			)
+		}
 		return nil, "", err
 	}
 
diff --git a/app/service/cartsService/cartsService.go b/app/service/cartsService/cartsService.go
index 4d5378a..8889bc9 100644
--- a/app/service/cartsService/cartsService.go
+++ b/app/service/cartsService/cartsService.go
@@ -4,6 +4,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/model"
 	"git.ma-al.com/goc_daniel/b2b/app/repos/cartsRepo"
 	constdata "git.ma-al.com/goc_daniel/b2b/app/utils/const_data"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
 )
 
@@ -34,6 +35,15 @@ func (s *CartsService) CreateNewCart(user_id uint, name string) (model.CustomerC
 
 	// create new cart for customer
 	cart, err = s.repo.CreateNewCart(user_id, name)
+	if err != nil {
+		return cart, err
+	}
+
+	logger.Info("cart created",
+		"service", "cartsService",
+		"user_id", user_id,
+		"cart_id", cart.CartID,
+	)
 
 	return cart, nil
 }
diff --git a/app/service/orderService/orderService.go b/app/service/orderService/orderService.go
index a78b17e..a5a90bb 100644
--- a/app/service/orderService/orderService.go
+++ b/app/service/orderService/orderService.go
@@ -1,7 +1,6 @@
 package orderService
 
 import (
-	"fmt"
 	"strconv"
 
 	"git.ma-al.com/goc_daniel/b2b/app/delivery/middleware/perms"
@@ -12,6 +11,7 @@ import (
 	"git.ma-al.com/goc_daniel/b2b/app/service/addressesService"
 	"git.ma-al.com/goc_daniel/b2b/app/service/emailService"
 	constdata "git.ma-al.com/goc_daniel/b2b/app/utils/const_data"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/logger"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/query/filters"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/query/find"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
@@ -49,9 +49,12 @@ func (s *OrderService) Find(user *model.Customer, p find.Paging, filt *filters.F
 
 	for i := 0; i < len(list.Items); i++ {
 		address_unparsed, err := s.addressesService.ValidateAddressJson(list.Items[i].AddressString, list.Items[i].CountryID)
-		// log such errors
 		if err != nil {
-			fmt.Printf("err: %v\n", err)
+			logger.Warn("failed to validate address",
+				"service", "orderService",
+				"order_id", list.Items[i].OrderID,
+				"error", err.Error(),
+			)
 		}
 
 		list.Items[i].AddressUnparsed = &address_unparsed
@@ -98,16 +101,23 @@ func (s *OrderService) PlaceNewOrder(user_id uint, cart_id uint, name string, co
 	// if no error is returned, remove the cart. This should be smooth
 	err = s.cartsRepo.RemoveCart(user_id, cart_id)
 	if err != nil {
-		// Log error but don't fail placing order
-		_ = err
+		logger.Warn("failed to remove cart after order placement",
+			"service", "orderService",
+			"user_id", user_id,
+			"cart_id", cart_id,
+			"error", err.Error(),
+		)
 	}
 
 	// send email to admin
 	go func(user_id uint) {
 		err := s.emailService.SendNewOrderPlacedNotification(user_id)
 		if err != nil {
-			// Log error but don't fail placing order
-			_ = err
+			logger.Warn("failed to send new order notification",
+				"service", "orderService",
+				"user_id", user_id,
+				"error", err.Error(),
+			)
 		}
 	}(user_id)
 
diff --git a/app/utils/logger/logger.go b/app/utils/logger/logger.go
new file mode 100644
index 0000000..4a73d3f
--- /dev/null
+++ b/app/utils/logger/logger.go
@@ -0,0 +1,151 @@
+package logger
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"log/slog"
+	"os"
+	"strings"
+)
+
+var L *slog.Logger
+
+const (
+	reset  = "\033[0m"
+	red    = "\033[31m"
+	yellow = "\033[33m"
+	green  = "\033[32m"
+	blue   = "\033[36m"
+	gray   = "\033[90m"
+)
+
+type consoleHandler struct {
+	w        io.Writer
+	colorize bool
+}
+
+func (h *consoleHandler) Enabled(ctx context.Context, level slog.Level) bool {
+	return true
+}
+
+func (h *consoleHandler) Handle(ctx context.Context, r slog.Record) error {
+	level := r.Level.String()
+	color := reset
+
+	switch r.Level {
+	case slog.LevelError:
+		color = red
+	case slog.LevelWarn:
+		color = yellow
+	case slog.LevelInfo:
+		color = blue
+	case slog.LevelDebug:
+		color = gray
+	}
+
+	var msg string
+	if h.colorize {
+		msg = fmt.Sprintf("%s%s%s %s%s%s %s%s%s",
+			reset, r.Time.Format("15:04:05"), reset,
+			color, level, reset,
+			reset, r.Message, reset)
+	} else {
+		msg = fmt.Sprintf("%s %s %s", r.Time.Format("15:04:05"), level, r.Message)
+	}
+
+	var pairs []string
+	r.Attrs(func(attr slog.Attr) bool {
+		if h.colorize {
+			pairs = append(pairs, fmt.Sprintf("%s%s=%s%v%s", green, attr.Key, reset, attr.Value, reset))
+		} else {
+			pairs = append(pairs, fmt.Sprintf("%s=%v", attr.Key, attr.Value))
+		}
+		return true
+	})
+
+	if len(pairs) > 0 {
+		msg += " " + strings.Join(pairs, " ")
+	}
+
+	fmt.Fprintln(h.w, msg)
+	return nil
+}
+
+func (h *consoleHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
+	return &consoleHandler{w: h.w, colorize: h.colorize}
+}
+
+func (h *consoleHandler) WithGroup(name string) slog.Handler {
+	return &consoleHandler{w: h.w, colorize: h.colorize}
+}
+
+func Init(service string, output io.Writer, level string, colorize bool) {
+	if output == nil {
+		output = os.Stderr
+	}
+
+	var lvl slog.Level
+	switch level {
+	case "debug":
+		lvl = slog.LevelDebug
+	case "warn":
+		lvl = slog.LevelWarn
+	case "error":
+		lvl = slog.LevelError
+	default:
+		lvl = slog.LevelInfo
+	}
+
+	if colorize {
+		L = slog.New(&consoleHandler{w: output, colorize: true}).With("service", service, "level", lvl.String())
+	} else {
+		L = slog.New(slog.NewJSONHandler(output, &slog.HandlerOptions{
+			Level:     lvl,
+			AddSource: false,
+			ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
+				if a.Key == slog.TimeKey && groups == nil {
+					a.Key = "timestamp"
+				}
+				if a.Key == slog.LevelKey {
+					a.Key = "level"
+				}
+				if a.Key == slog.MessageKey {
+					a.Key = "message"
+				}
+				return a
+			},
+		})).With("service", service)
+	}
+}
+
+func Info(msg string, args ...any) {
+	if L != nil {
+		L.Info(msg, args...)
+	}
+}
+
+func Warn(msg string, args ...any) {
+	if L != nil {
+		L.Warn(msg, args...)
+	}
+}
+
+func Error(msg string, args ...any) {
+	if L != nil {
+		L.Error(msg, args...)
+	}
+}
+
+func Debug(msg string, args ...any) {
+	if L != nil {
+		L.Debug(msg, args...)
+	}
+}
+
+func With(args ...any) *slog.Logger {
+	if L == nil {
+		return nil
+	}
+	return L.With(args...)
+}
diff --git a/i18n/migrations/20260302163122_create_tables.sql b/i18n/migrations/20260302163122_create_tables.sql
index 50f06c8..f8a1997 100644
--- a/i18n/migrations/20260302163122_create_tables.sql
+++ b/i18n/migrations/20260302163122_create_tables.sql
@@ -113,7 +113,7 @@ CREATE TABLE IF NOT EXISTS b2b_customers (
   created_at                      DATETIME(6) NULL,
   updated_at                      DATETIME(6) NULL,
   deleted_at                      DATETIME(6) NULL,
-  is_no_vat                     TINYINT(1) NULL DEFAULT 0 
+  is_no_vat                     TINYINT(1) NOT NULL DEFAULT 0 
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE UNIQUE INDEX IF NOT EXISTS idx_customers_email