diff --git a/src/SIGCM.API/Controllers/AdvertisingController.cs b/src/SIGCM.API/Controllers/AdvertisingController.cs
new file mode 100644
index 0000000..c84d923
--- /dev/null
+++ b/src/SIGCM.API/Controllers/AdvertisingController.cs
@@ -0,0 +1,78 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+
+namespace SIGCM.API.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+[Authorize]
+public class AdvertisingController : ControllerBase
+{
+  private readonly IAdvertisingRepository _repo;
+
+  public AdvertisingController(IAdvertisingRepository repo)
+  {
+    _repo = repo;
+  }
+
+  // --- ENDPOINTS DE CONFIGURACIÓN (ADMIN) ---
+
+  [HttpPost("grids")]
+  [Authorize(Roles = "Admin")]
+  public async Task<IActionResult> CreateGrid(GraphicGrid grid)
+  {
+    var id = await _repo.CreateGridAsync(grid);
+    return Ok(new { id });
+  }
+
+  [HttpGet("company/{companyId}/grids")]
+  public async Task<IActionResult> GetGrids(int companyId)
+  {
+    var grids = await _repo.GetGridsByCompanyAsync(companyId);
+    return Ok(grids);
+  }
+
+  [HttpPost("radio-tariffs")]
+  [Authorize(Roles = "Admin")]
+  public async Task<IActionResult> CreateRadioTariff(RadioTariff tariff)
+  {
+    var id = await _repo.CreateRadioTariffAsync(tariff);
+    return Ok(new { id });
+  }
+
+  // --- ENDPOINTS DE CÁLCULO (CALCULADORA) ---
+
+  [HttpPost("calculate/graphic")]
+  public async Task<IActionResult> CalculateGraphic([FromBody] GraphicCalcRequest request)
+  {
+    var grid = await _repo.GetGridByIdAsync(request.GridId);
+    if (grid == null) return NotFound("Tarifario no encontrado");
+
+    // Cálculo Base: (Columnas * Módulos) * PrecioUnitario
+    decimal basePrice = (request.Columns * request.Modules) * grid.PricePerModule;
+
+    // Recargo Color
+    decimal colorSurcharge = request.IsColor
+        ? basePrice * (grid.ColorSurchargePercentage / 100m)
+        : 0;
+
+    decimal total = basePrice + colorSurcharge;
+
+    return Ok(new
+    {
+      Total = total,
+      Details = $"{request.Columns} col x {request.Modules} mod @ ${grid.PricePerModule}/mod" + (request.IsColor ? " + Color" : "")
+    });
+  }
+}
+
+// DTOs simples para la calculadora
+public class GraphicCalcRequest
+{
+  public int GridId { get; set; }
+  public int Columns { get; set; }
+  public int Modules { get; set; }
+  public bool IsColor { get; set; }
+}
\ No newline at end of file
diff --git a/src/SIGCM.API/Controllers/FinanceController.cs b/src/SIGCM.API/Controllers/FinanceController.cs
new file mode 100644
index 0000000..e887e01
--- /dev/null
+++ b/src/SIGCM.API/Controllers/FinanceController.cs
@@ -0,0 +1,46 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+
+namespace SIGCM.API.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+[Authorize(Roles = "Admin,Gerente")] // Solo roles altos tocan dinero
+public class FinanceController : ControllerBase
+{
+  private readonly IClientProfileRepository _repo;
+
+  public FinanceController(IClientProfileRepository repo)
+  {
+    _repo = repo;
+  }
+
+  [HttpGet("client/{id}")]
+  public async Task<IActionResult> GetClientStatus(int id)
+  {
+    var profile = await _repo.GetProfileAsync(id);
+    var debt = await _repo.CalculateCurrentDebtAsync(id);
+
+    if (profile == null) return NotFound("Cliente sin perfil financiero");
+
+    profile.CurrentDebt = debt; // Llenamos la propiedad calculada
+    return Ok(profile);
+  }
+
+  [HttpPost("client/{id}")]
+  public async Task<IActionResult> UpdateProfile(int id, [FromBody] ClientProfile profile)
+  {
+    profile.UserId = id;
+    await _repo.UpsertProfileAsync(profile);
+    return Ok(new { message = "Perfil financiero actualizado" });
+  }
+
+  [HttpGet("debtors")]
+  public async Task<IActionResult> GetDebtors()
+  {
+    var debtors = await _repo.GetDebtorsAsync();
+    return Ok(debtors);
+  }
+}
\ No newline at end of file
diff --git a/src/SIGCM.API/Controllers/OrdersController.cs b/src/SIGCM.API/Controllers/OrdersController.cs
new file mode 100644
index 0000000..de34a09
--- /dev/null
+++ b/src/SIGCM.API/Controllers/OrdersController.cs
@@ -0,0 +1,64 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using SIGCM.Application.DTOs;
+using SIGCM.Application.Interfaces;
+using SIGCM.Domain.Interfaces; // Para acceder a repos de lectura directa si hace falta
+
+namespace SIGCM.API.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+[Authorize]
+public class OrdersController : ControllerBase
+{
+  private readonly IOrderService _orderService;
+  private readonly IOrderRepository _orderRepo; // Para lecturas simples (GET)
+
+  public OrdersController(IOrderService orderService, IOrderRepository orderRepo)
+  {
+    _orderService = orderService;
+    _orderRepo = orderRepo;
+  }
+
+  // Crear una nueva orden de venta
+  [HttpPost]
+  public async Task<IActionResult> Create(CreateOrderDto dto)
+  {
+    try
+    {
+      // Seguridad: Forzar que el vendedor sea el usuario logueado si no se especifica
+      var userIdClaim = User.FindFirst("Id")?.Value;
+      if (int.TryParse(userIdClaim, out int userId))
+      {
+        dto.SellerId = userId;
+      }
+
+      var result = await _orderService.CreateOrderAsync(dto);
+      return Ok(result);
+    }
+    catch (Exception ex)
+    {
+      return BadRequest(new { message = ex.Message });
+    }
+  }
+
+  // Obtener historial de órdenes de un cliente
+  [HttpGet("client/{clientId}")]
+  public async Task<IActionResult> GetByClient(int clientId)
+  {
+    var orders = await _orderRepo.GetByClientIdAsync(clientId);
+    return Ok(orders);
+  }
+
+  // Obtener detalle de una orden
+  [HttpGet("{id}")]
+  public async Task<IActionResult> GetById(int id)
+  {
+    var order = await _orderRepo.GetByIdAsync(id);
+    if (order == null) return NotFound();
+
+    var items = await _orderRepo.GetItemsByOrderIdAsync(id);
+
+    return Ok(new { Order = order, Items = items });
+  }
+}
\ No newline at end of file
diff --git a/src/SIGCM.API/Controllers/ProductsController.cs b/src/SIGCM.API/Controllers/ProductsController.cs
new file mode 100644
index 0000000..a2fa5ac
--- /dev/null
+++ b/src/SIGCM.API/Controllers/ProductsController.cs
@@ -0,0 +1,102 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+
+namespace SIGCM.API.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+[Authorize] // Requiere login para ver el catálogo interno
+public class ProductsController : ControllerBase
+{
+  private readonly IProductRepository _repository;
+
+  public ProductsController(IProductRepository repository)
+  {
+    _repository = repository;
+  }
+
+  [HttpGet]
+  public async Task<IActionResult> GetAll()
+  {
+    var products = await _repository.GetAllAsync();
+    return Ok(products);
+  }
+
+  [HttpGet("{id}")]
+  public async Task<IActionResult> GetById(int id)
+  {
+    var product = await _repository.GetByIdAsync(id);
+    if (product == null) return NotFound();
+    return Ok(product);
+  }
+
+  // Obtener productos de una empresa específica (ej: Solo productos de Radio)
+  [HttpGet("company/{companyId}")]
+  public async Task<IActionResult> GetByCompany(int companyId)
+  {
+    var products = await _repository.GetByCompanyIdAsync(companyId);
+    return Ok(products);
+  }
+
+  [HttpPost]
+  [Authorize(Roles = "Admin")] // Solo Admins crean productos
+  public async Task<IActionResult> Create(Product product)
+  {
+    // Validaciones básicas
+    if (product.CompanyId <= 0) return BadRequest("Debe especificar una Empresa válida.");
+    if (product.ProductTypeId <= 0) return BadRequest("Debe especificar el Tipo de Producto.");
+
+    var id = await _repository.CreateAsync(product);
+    product.Id = id;
+    return CreatedAtAction(nameof(GetById), new { id }, product);
+  }
+
+  [HttpPut("{id}")]
+  [Authorize(Roles = "Admin")]
+  public async Task<IActionResult> Update(int id, Product product)
+  {
+    if (id != product.Id) return BadRequest();
+    await _repository.UpdateAsync(product);
+    return NoContent();
+  }
+
+  // Helper: Obtener lista de empresas para llenar el combo en el Frontend
+  [HttpGet("companies")]
+  public async Task<IActionResult> GetCompanies()
+  {
+    var companies = await _repository.GetAllCompaniesAsync();
+    return Ok(companies);
+  }
+
+  // Agregar un producto hijo a un bundle
+  [HttpPost("{bundleId}/components")]
+  [Authorize(Roles = "Admin")]
+  public async Task<IActionResult> AddBundleComponent(int bundleId, [FromBody] ProductBundle bundle)
+  {
+    // Validaciones de integridad
+    if (bundleId != bundle.ParentProductId && bundle.ParentProductId != 0)
+      return BadRequest("ID de URL no coincide con el cuerpo.");
+
+    bundle.ParentProductId = bundleId; // Asegurar consistencia
+
+    if (bundle.ChildProductId <= 0) return BadRequest("Debe especificar un producto hijo válido.");
+    if (bundle.Quantity <= 0) return BadRequest("La cantidad debe ser mayor a 0.");
+
+    // Evitar ciclos (Un bundle no puede contenerse a sí mismo)
+    if (bundle.ParentProductId == bundle.ChildProductId)
+      return BadRequest("Un combo no puede contenerse a sí mismo.");
+
+    await _repository.AddComponentToBundleAsync(bundle);
+    return Ok(new { message = "Componente configurado exitosamente." });
+  }
+
+  [HttpDelete("{bundleId}/components/{childId}")]
+  [Authorize(Roles = "Admin")]
+  public async Task<IActionResult> RemoveBundleComponent(int bundleId, int childId)
+  {
+    await _repository.RemoveComponentFromBundleAsync(bundleId, childId);
+    return NoContent();
+  }
+}
\ No newline at end of file
diff --git a/src/SIGCM.API/Controllers/SellersController.cs b/src/SIGCM.API/Controllers/SellersController.cs
new file mode 100644
index 0000000..28848cf
--- /dev/null
+++ b/src/SIGCM.API/Controllers/SellersController.cs
@@ -0,0 +1,74 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+
+namespace SIGCM.API.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+[Authorize]
+public class SellersController : ControllerBase
+{
+  private readonly ISellerRepository _repository;
+
+  public SellersController(ISellerRepository repository)
+  {
+    _repository = repository;
+  }
+
+  // Para llenar el combo de "Vendedor" en la pantalla de carga
+  [HttpGet]
+  public async Task<IActionResult> GetAll()
+  {
+    var sellers = await _repository.GetAllActiveSellersAsync();
+    return Ok(sellers);
+  }
+
+  // Obtener configuración de un vendedor (Solo Admin)
+  [HttpGet("{id}/profile")]
+  [Authorize(Roles = "Admin")]
+  public async Task<IActionResult> GetProfile(int id)
+  {
+    var profile = await _repository.GetProfileAsync(id);
+    // Si no tiene perfil aún, devolvemos un default vacío para que el front lo llene
+    if (profile == null) return Ok(new { UserId = id, BaseCommissionPercentage = 0 });
+    return Ok(profile);
+  }
+
+  // Guardar configuración (Solo Admin)
+  [HttpPost("{id}/profile")]
+  [Authorize(Roles = "Admin")]
+  public async Task<IActionResult> UpsertProfile(int id, [FromBody] SellerProfile profile)
+  {
+    profile.UserId = id; // Asegurar ID
+    await _repository.UpsertProfileAsync(profile);
+    return Ok(new { message = "Perfil de vendedor actualizado" });
+  }
+
+  // Dashboard personal del vendedor (Mis Ventas del Mes)
+  [HttpGet("my-performance")]
+  public async Task<IActionResult> GetMyPerformance()
+  {
+    var userIdStr = User.FindFirst("Id")?.Value;
+    if (!int.TryParse(userIdStr, out int userId)) return Unauthorized();
+
+    var totalSold = await _repository.GetMonthlySalesAsync(userId, DateTime.UtcNow);
+
+    // Recuperamos su % para mostrar proyección estimada
+    var profile = await _repository.GetProfileAsync(userId);
+    var rate = profile?.BaseCommissionPercentage ?? 0;
+
+    // Estimación gruesa (comisión sobre el total bruto, idealmente sería sobre el neto)
+    // Para mayor precisión se debería hacer un query de suma de CommissionAmount en OrderItems
+    var estimatedCommission = totalSold * (rate / 100m);
+
+    return Ok(new
+    {
+      Period = DateTime.UtcNow.ToString("MM/yyyy"),
+      TotalSales = totalSold,
+      CommissionRate = rate,
+      EstimatedEarnings = estimatedCommission
+    });
+  }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Application/DTOs/OrderDtos.cs b/src/SIGCM.Application/DTOs/OrderDtos.cs
new file mode 100644
index 0000000..66d5a7d
--- /dev/null
+++ b/src/SIGCM.Application/DTOs/OrderDtos.cs
@@ -0,0 +1,37 @@
+namespace SIGCM.Application.DTOs;
+
+public class CreateOrderDto
+{
+  public int ClientId { get; set; } // Quién compra
+  public int SellerId { get; set; } // Quién vende (Usuario logueado)
+  public List<OrderItemDto> Items { get; set; } = new();
+
+  public DateTime? DueDate { get; set; } // Para Cta Cte
+  public string? Notes { get; set; }
+
+  // Si es true, la orden nace como "Pagada" (Venta Contado)
+  // Si es false, nace como "Pendiente" (Cuenta Corriente)
+  public bool IsDirectPayment { get; set; } = true;
+}
+
+public class OrderItemDto
+{
+  public int ProductId { get; set; }
+  public decimal Quantity { get; set; }
+
+  // Opcional: Si el vendedor aplica un descuento manual unitario
+  // (Por ahora usaremos el precio base del producto)
+  // public decimal? ManualUnitPrice { get; set; } 
+
+  // Para vincular con un aviso específico creado previamente
+  public int? RelatedEntityId { get; set; }
+  public string? RelatedEntityType { get; set; } // 'Listing'
+}
+
+public class OrderResultDto
+{
+  public int OrderId { get; set; }
+  public string OrderNumber { get; set; } = string.Empty;
+  public decimal TotalAmount { get; set; }
+  public string Status { get; set; } = string.Empty;
+}
\ No newline at end of file
diff --git a/src/SIGCM.Application/Interfaces/IOrderService.cs b/src/SIGCM.Application/Interfaces/IOrderService.cs
new file mode 100644
index 0000000..f8f6de9
--- /dev/null
+++ b/src/SIGCM.Application/Interfaces/IOrderService.cs
@@ -0,0 +1,12 @@
+using SIGCM.Application.DTOs;
+
+namespace SIGCM.Application.Interfaces;
+
+public interface IOrderService
+{
+  Task<OrderResultDto> CreateOrderAsync(CreateOrderDto dto);
+
+  // Aquí agregaremos métodos futuros como:
+  // Task CancelOrderAsync(int id);
+  // Task<byte[]> GenerateInvoicePdfAsync(int id);
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Entities/ClientProfile.cs b/src/SIGCM.Domain/Entities/ClientProfile.cs
new file mode 100644
index 0000000..9886643
--- /dev/null
+++ b/src/SIGCM.Domain/Entities/ClientProfile.cs
@@ -0,0 +1,15 @@
+namespace SIGCM.Domain.Entities;
+
+public class ClientProfile
+{
+  public int UserId { get; set; }
+  public decimal CreditLimit { get; set; }
+  public int PaymentTermsDays { get; set; } // Días de vencimiento por defecto
+  public bool IsCreditBlocked { get; set; }
+  public string? BlockReason { get; set; }
+  public DateTime LastCreditCheckAt { get; set; }
+
+  // Propiedades calculadas (no se guardan en esta tabla, vienen del Join/Query)
+  public decimal CurrentDebt { get; set; } // Deuda actual calculada
+  public string? ClientName { get; set; }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Entities/Company.cs b/src/SIGCM.Domain/Entities/Company.cs
new file mode 100644
index 0000000..99cf865
--- /dev/null
+++ b/src/SIGCM.Domain/Entities/Company.cs
@@ -0,0 +1,12 @@
+namespace SIGCM.Domain.Entities;
+
+public class Company
+{
+  public int Id { get; set; }
+  public required string Name { get; set; }
+  public required string TaxId { get; set; } // CUIT
+  public string? LegalAddress { get; set; }
+  public string? LogoUrl { get; set; }
+  public string? ExternalSystemId { get; set; }
+  public bool IsActive { get; set; } = true;
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Entities/ExternalClientMapping.cs b/src/SIGCM.Domain/Entities/ExternalClientMapping.cs
new file mode 100644
index 0000000..faf29e2
--- /dev/null
+++ b/src/SIGCM.Domain/Entities/ExternalClientMapping.cs
@@ -0,0 +1,10 @@
+namespace SIGCM.Domain.Entities;
+
+public class ExternalClientMapping
+{
+  public int LocalUserId { get; set; }
+  public required string ExternalSystemName { get; set; } // 'Tango', 'SAP', 'CustomBilling'
+  public required string ExternalClientId { get; set; }
+  public string? AdditionalData { get; set; } // JSON
+  public DateTime LastSyncedAt { get; set; }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Entities/GraphicGrid.cs b/src/SIGCM.Domain/Entities/GraphicGrid.cs
new file mode 100644
index 0000000..44fce6f
--- /dev/null
+++ b/src/SIGCM.Domain/Entities/GraphicGrid.cs
@@ -0,0 +1,20 @@
+namespace SIGCM.Domain.Entities;
+
+public class GraphicGrid
+{
+  public int Id { get; set; }
+  public int CompanyId { get; set; }
+  public required string Name { get; set; }
+
+  public decimal ColumnWidthMm { get; set; }
+  public decimal ModuleHeightMm { get; set; }
+
+  public decimal PricePerModule { get; set; }
+  public int MaxColumns { get; set; }
+  public int MaxModules { get; set; }
+
+  public decimal ColorSurchargePercentage { get; set; }
+  public decimal TopPositionSurchargePercentage { get; set; }
+
+  public bool IsActive { get; set; } = true;
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Entities/Order.cs b/src/SIGCM.Domain/Entities/Order.cs
new file mode 100644
index 0000000..d4b4a00
--- /dev/null
+++ b/src/SIGCM.Domain/Entities/Order.cs
@@ -0,0 +1,26 @@
+namespace SIGCM.Domain.Entities;
+
+public class Order
+{
+  public int Id { get; set; }
+  public required string OrderNumber { get; set; } // Ej: ORD-2026-0001
+  public int? ClientId { get; set; } // Usuario Comprador
+  public int? SellerId { get; set; } // Usuario Vendedor (si aplica)
+
+  public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+  public DateTime? DueDate { get; set; } // Vencimiento (Cta Cte)
+
+  public decimal TotalNet { get; set; }
+  public decimal TotalTax { get; set; }
+  public decimal TotalAmount { get; set; }
+
+  public string PaymentStatus { get; set; } = "Pending"; // Pending, Paid, Partial
+  public string FulfillmentStatus { get; set; } = "Pending"; // Pending, Fulfilled
+
+  public string? ExternalBillingId { get; set; } // ID en sistema externo
+  public string? Notes { get; set; }
+
+  // Auxiliares
+  public string? ClientName { get; set; }
+  public string? SellerName { get; set; }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Entities/OrderItem.cs b/src/SIGCM.Domain/Entities/OrderItem.cs
new file mode 100644
index 0000000..f49b7d3
--- /dev/null
+++ b/src/SIGCM.Domain/Entities/OrderItem.cs
@@ -0,0 +1,24 @@
+namespace SIGCM.Domain.Entities;
+
+public class OrderItem
+{
+  public int Id { get; set; }
+  public int OrderId { get; set; }
+  public int ProductId { get; set; }
+  public int CompanyId { get; set; } // Para facturación cruzada
+
+  // Vinculación polimórfica (Ej: ID del Listing que se acaba de crear)
+  public int? RelatedEntityId { get; set; }
+  public string? RelatedEntityType { get; set; } // 'Listing', 'Merchandise', 'RadioSpot'
+
+  public decimal Quantity { get; set; }
+  public decimal UnitPrice { get; set; }
+  public decimal TaxRate { get; set; }
+  public decimal SubTotal { get; set; }
+
+  public decimal CommissionPercentage { get; set; }
+  public decimal CommissionAmount { get; set; }
+
+  // Auxiliar
+  public string? ProductName { get; set; }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Entities/Product.cs b/src/SIGCM.Domain/Entities/Product.cs
new file mode 100644
index 0000000..f774efb
--- /dev/null
+++ b/src/SIGCM.Domain/Entities/Product.cs
@@ -0,0 +1,22 @@
+namespace SIGCM.Domain.Entities;
+
+public class Product
+{
+  public int Id { get; set; }
+  public int CompanyId { get; set; }
+  public int ProductTypeId { get; set; }
+  public required string Name { get; set; }
+  public string? Description { get; set; }
+  public string? SKU { get; set; }
+  public string? ExternalId { get; set; }
+
+  public decimal BasePrice { get; set; }
+  public decimal TaxRate { get; set; } // 21.0, 10.5, etc.
+  public string Currency { get; set; } = "ARS";
+
+  public bool IsActive { get; set; } = true;
+
+  // Propiedades auxiliares para Joins
+  public string? CompanyName { get; set; }
+  public string? TypeCode { get; set; } // 'CLASSIFIED_AD', 'PHYSICAL', etc.
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Entities/ProductBundle.cs b/src/SIGCM.Domain/Entities/ProductBundle.cs
new file mode 100644
index 0000000..4a34b07
--- /dev/null
+++ b/src/SIGCM.Domain/Entities/ProductBundle.cs
@@ -0,0 +1,13 @@
+namespace SIGCM.Domain.Entities;
+
+public class ProductBundle
+{
+  public int Id { get; set; }
+  public int ParentProductId { get; set; }
+  public int ChildProductId { get; set; }
+  public decimal Quantity { get; set; }
+  public decimal? FixedAllocationAmount { get; set; }
+
+  // Propiedades de navegación (para lógica de negocio)
+  public Product? ChildProduct { get; set; }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Entities/RadioTariff.cs b/src/SIGCM.Domain/Entities/RadioTariff.cs
new file mode 100644
index 0000000..be72e59
--- /dev/null
+++ b/src/SIGCM.Domain/Entities/RadioTariff.cs
@@ -0,0 +1,16 @@
+namespace SIGCM.Domain.Entities;
+
+public class RadioTariff
+{
+  public int Id { get; set; }
+  public int CompanyId { get; set; }
+  public required string ProgramName { get; set; }
+
+  public TimeSpan? TimeSlotStart { get; set; }
+  public TimeSpan? TimeSlotEnd { get; set; }
+
+  public decimal PricePerSecond { get; set; }
+  public decimal PricePerSpot { get; set; }
+
+  public bool IsActive { get; set; } = true;
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Entities/SellerProfile.cs b/src/SIGCM.Domain/Entities/SellerProfile.cs
new file mode 100644
index 0000000..3f66133
--- /dev/null
+++ b/src/SIGCM.Domain/Entities/SellerProfile.cs
@@ -0,0 +1,12 @@
+namespace SIGCM.Domain.Entities;
+
+public class SellerProfile
+{
+  public int UserId { get; set; } // PK y FK a Users
+  public string? SellerCode { get; set; }
+  public decimal BaseCommissionPercentage { get; set; }
+  public bool IsActive { get; set; } = true;
+
+  // Auxiliar
+  public string? Username { get; set; }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Interfaces/IAdvertisingRepository.cs b/src/SIGCM.Domain/Interfaces/IAdvertisingRepository.cs
new file mode 100644
index 0000000..d9890a6
--- /dev/null
+++ b/src/SIGCM.Domain/Interfaces/IAdvertisingRepository.cs
@@ -0,0 +1,15 @@
+using SIGCM.Domain.Entities;
+
+namespace SIGCM.Domain.Interfaces;
+
+public interface IAdvertisingRepository
+{
+  // Gráfica
+  Task<IEnumerable<GraphicGrid>> GetGridsByCompanyAsync(int companyId);
+  Task<GraphicGrid?> GetGridByIdAsync(int id);
+  Task<int> CreateGridAsync(GraphicGrid grid);
+
+  // Radio
+  Task<IEnumerable<RadioTariff>> GetRadioTariffsByCompanyAsync(int companyId);
+  Task<int> CreateRadioTariffAsync(RadioTariff tariff);
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Interfaces/IClientProfileRepository.cs b/src/SIGCM.Domain/Interfaces/IClientProfileRepository.cs
new file mode 100644
index 0000000..6e13c2f
--- /dev/null
+++ b/src/SIGCM.Domain/Interfaces/IClientProfileRepository.cs
@@ -0,0 +1,15 @@
+using SIGCM.Domain.Entities;
+
+namespace SIGCM.Domain.Interfaces;
+
+public interface IClientProfileRepository
+{
+  Task<ClientProfile?> GetProfileAsync(int userId);
+  Task UpsertProfileAsync(ClientProfile profile);
+
+  // La métrica crítica: Suma de (TotalAmount - Pagado) de órdenes pendientes
+  Task<decimal> CalculateCurrentDebtAsync(int userId);
+
+  // Listado de clientes con deuda (Reporte de Morosos)
+  Task<IEnumerable<ClientProfile>> GetDebtorsAsync();
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Interfaces/IOrderRepository.cs b/src/SIGCM.Domain/Interfaces/IOrderRepository.cs
new file mode 100644
index 0000000..cf69e6f
--- /dev/null
+++ b/src/SIGCM.Domain/Interfaces/IOrderRepository.cs
@@ -0,0 +1,16 @@
+using SIGCM.Domain.Entities;
+
+namespace SIGCM.Domain.Interfaces;
+
+public interface IOrderRepository
+{
+  // Crear una orden completa con sus ítems transaccionalmente
+  Task<int> CreateOrderAsync(Order order, IEnumerable<OrderItem> items);
+
+  Task<Order?> GetByIdAsync(int id);
+  Task<IEnumerable<Order>> GetByClientIdAsync(int clientId);
+  Task<IEnumerable<OrderItem>> GetItemsByOrderIdAsync(int orderId);
+
+  // Gestión de Estados (Cta Cte -> Pagado)
+  Task UpdatePaymentStatusAsync(int orderId, string status);
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Interfaces/IProductRepository.cs b/src/SIGCM.Domain/Interfaces/IProductRepository.cs
new file mode 100644
index 0000000..c4b57d6
--- /dev/null
+++ b/src/SIGCM.Domain/Interfaces/IProductRepository.cs
@@ -0,0 +1,16 @@
+using SIGCM.Domain.Entities;
+
+namespace SIGCM.Domain.Interfaces;
+
+public interface IProductRepository
+{
+  Task<IEnumerable<Product>> GetAllAsync();
+  Task<IEnumerable<Product>> GetByCompanyIdAsync(int companyId);
+  Task<Product?> GetByIdAsync(int id);
+  Task<int> CreateAsync(Product product);
+  Task UpdateAsync(Product product);
+  Task<IEnumerable<Company>> GetAllCompaniesAsync(); // Helper para no crear un repo solo para esto por ahora
+  Task<IEnumerable<ProductBundle>> GetBundleComponentsAsync(int parentProductId);
+  Task AddComponentToBundleAsync(ProductBundle bundle);
+  Task RemoveComponentFromBundleAsync(int bundleId, int childProductId);
+}
\ No newline at end of file
diff --git a/src/SIGCM.Domain/Interfaces/ISellerRepository.cs b/src/SIGCM.Domain/Interfaces/ISellerRepository.cs
new file mode 100644
index 0000000..ad8c451
--- /dev/null
+++ b/src/SIGCM.Domain/Interfaces/ISellerRepository.cs
@@ -0,0 +1,18 @@
+using SIGCM.Domain.Entities;
+
+namespace SIGCM.Domain.Interfaces;
+
+public interface ISellerRepository
+{
+  // Obtener perfil específico (con datos de usuario)
+  Task<SellerProfile?> GetProfileAsync(int userId);
+
+  // Guardar o actualizar configuración del vendedor
+  Task UpsertProfileAsync(SellerProfile profile);
+
+  // Listar todos los usuarios que son vendedores activos
+  Task<IEnumerable<dynamic>> GetAllActiveSellersAsync();
+
+  // Obtener métricas rápidas (Total vendido en el mes)
+  Task<decimal> GetMonthlySalesAsync(int sellerId, DateTime month);
+}
\ No newline at end of file
diff --git a/src/SIGCM.Infrastructure/DependencyInjection.cs b/src/SIGCM.Infrastructure/DependencyInjection.cs
index 30911c7..ae9b128 100644
--- a/src/SIGCM.Infrastructure/DependencyInjection.cs
+++ b/src/SIGCM.Infrastructure/DependencyInjection.cs
@@ -27,13 +27,19 @@ public static class DependencyInjection
         services.AddScoped<ClientRepository>();
         services.AddScoped<AuditRepository>();
         //services.AddScoped<CashClosingRepository>();
-        services.AddScoped<CashSessionRepository>(); 
+        services.AddScoped<CashSessionRepository>();
         services.AddScoped<EditionClosureRepository>();
         services.AddScoped<ImageOptimizationService>();
         services.AddScoped<IClaimRepository, ClaimRepository>();
         services.AddScoped<NotificationRepository>();
         services.AddScoped<ICouponRepository, CouponRepository>();
         services.AddScoped<IListingNoteRepository, ListingNoteRepository>();
+        services.AddScoped<IProductRepository, ProductRepository>();
+        services.AddScoped<IOrderRepository, OrderRepository>();
+        services.AddScoped<IOrderService, OrderService>();
+        services.AddScoped<IAdvertisingRepository, AdvertisingRepository>();
+        services.AddScoped<ISellerRepository, SellerRepository>();
+        services.AddScoped<IClientProfileRepository, ClientProfileRepository>();
 
         // Registro de MercadoPagoService configurado desde IConfiguration (appsettings o env vars)
         services.AddScoped<MercadoPagoService>(sp =>
diff --git a/src/SIGCM.Infrastructure/Repositories/AdvertisingRepository.cs b/src/SIGCM.Infrastructure/Repositories/AdvertisingRepository.cs
new file mode 100644
index 0000000..06e5011
--- /dev/null
+++ b/src/SIGCM.Infrastructure/Repositories/AdvertisingRepository.cs
@@ -0,0 +1,61 @@
+using Dapper;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+using SIGCM.Infrastructure.Data;
+
+namespace SIGCM.Infrastructure.Repositories;
+
+public class AdvertisingRepository : IAdvertisingRepository
+{
+  private readonly IDbConnectionFactory _db;
+  public AdvertisingRepository(IDbConnectionFactory db) => _db = db;
+
+  // --- GRÁFICA ---
+  public async Task<IEnumerable<GraphicGrid>> GetGridsByCompanyAsync(int companyId)
+  {
+    using var conn = _db.CreateConnection();
+    return await conn.QueryAsync<GraphicGrid>(
+        "SELECT * FROM GraphicGrids WHERE CompanyId = @CompanyId AND IsActive = 1",
+        new { CompanyId = companyId });
+  }
+
+  public async Task<GraphicGrid?> GetGridByIdAsync(int id)
+  {
+    using var conn = _db.CreateConnection();
+    return await conn.QuerySingleOrDefaultAsync<GraphicGrid>(
+        "SELECT * FROM GraphicGrids WHERE Id = @Id", new { Id = id });
+  }
+
+  public async Task<int> CreateGridAsync(GraphicGrid grid)
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+            INSERT INTO GraphicGrids 
+            (CompanyId, Name, ColumnWidthMm, ModuleHeightMm, PricePerModule, MaxColumns, MaxModules, ColorSurchargePercentage, IsActive)
+            VALUES 
+            (@CompanyId, @Name, @ColumnWidthMm, @ModuleHeightMm, @PricePerModule, @MaxColumns, @MaxModules, @ColorSurchargePercentage, @IsActive);
+            SELECT CAST(SCOPE_IDENTITY() as int);";
+    return await conn.QuerySingleAsync<int>(sql, grid);
+  }
+
+  // --- RADIO ---
+  public async Task<IEnumerable<RadioTariff>> GetRadioTariffsByCompanyAsync(int companyId)
+  {
+    using var conn = _db.CreateConnection();
+    return await conn.QueryAsync<RadioTariff>(
+        "SELECT * FROM RadioTariffs WHERE CompanyId = @CompanyId AND IsActive = 1",
+        new { CompanyId = companyId });
+  }
+
+  public async Task<int> CreateRadioTariffAsync(RadioTariff tariff)
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+            INSERT INTO RadioTariffs 
+            (CompanyId, ProgramName, TimeSlotStart, TimeSlotEnd, PricePerSecond, PricePerSpot, IsActive)
+            VALUES 
+            (@CompanyId, @ProgramName, @TimeSlotStart, @TimeSlotEnd, @PricePerSecond, @PricePerSpot, @IsActive);
+            SELECT CAST(SCOPE_IDENTITY() as int);";
+    return await conn.QuerySingleAsync<int>(sql, tariff);
+  }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Infrastructure/Repositories/ClientProfileRepository.cs b/src/SIGCM.Infrastructure/Repositories/ClientProfileRepository.cs
new file mode 100644
index 0000000..097052b
--- /dev/null
+++ b/src/SIGCM.Infrastructure/Repositories/ClientProfileRepository.cs
@@ -0,0 +1,103 @@
+using Dapper;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+using SIGCM.Infrastructure.Data;
+
+namespace SIGCM.Infrastructure.Repositories;
+
+public class ClientProfileRepository : IClientProfileRepository
+{
+  private readonly IDbConnectionFactory _db;
+  public ClientProfileRepository(IDbConnectionFactory db) => _db = db;
+
+  public async Task<ClientProfile?> GetProfileAsync(int userId)
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+            SELECT cp.*, u.BillingName as ClientName
+            FROM ClientProfiles cp
+            JOIN Users u ON cp.UserId = u.Id
+            WHERE cp.UserId = @UserId";
+    return await conn.QuerySingleOrDefaultAsync<ClientProfile>(sql, new { UserId = userId });
+  }
+
+  public async Task UpsertProfileAsync(ClientProfile profile)
+  {
+    using var conn = _db.CreateConnection();
+    var exists = await conn.ExecuteScalarAsync<int>(
+        "SELECT COUNT(1) FROM ClientProfiles WHERE UserId = @UserId", new { profile.UserId });
+
+    if (exists > 0)
+    {
+      var sql = @"
+                UPDATE ClientProfiles 
+                SET CreditLimit = @CreditLimit, 
+                    PaymentTermsDays = @PaymentTermsDays,
+                    IsCreditBlocked = @IsCreditBlocked,
+                    BlockReason = @BlockReason,
+                    LastCreditCheckAt = GETUTCDATE()
+                WHERE UserId = @UserId";
+      await conn.ExecuteAsync(sql, profile);
+    }
+    else
+    {
+      var sql = @"
+                INSERT INTO ClientProfiles (UserId, CreditLimit, PaymentTermsDays, IsCreditBlocked, BlockReason)
+                VALUES (@UserId, @CreditLimit, @PaymentTermsDays, @IsCreditBlocked, @BlockReason)";
+      await conn.ExecuteAsync(sql, profile);
+    }
+  }
+
+  public async Task<decimal> CalculateCurrentDebtAsync(int userId)
+  {
+    using var conn = _db.CreateConnection();
+    // Sumamos el total de órdenes que NO están pagadas ('Paid') ni canceladas ('Cancelled')
+    // Asumimos deuda total por simplicidad. En un sistema más complejo sumaríamos (TotalAmount - PagosParciales).
+    var sql = @"
+            SELECT ISNULL(SUM(TotalAmount), 0)
+            FROM Orders
+            WHERE ClientId = @UserId 
+              AND PaymentStatus NOT IN ('Paid', 'Cancelled')";
+
+    return await conn.ExecuteScalarAsync<decimal>(sql, new { UserId = userId });
+  }
+
+  public async Task<IEnumerable<ClientProfile>> GetDebtorsAsync()
+  {
+    using var conn = _db.CreateConnection();
+
+    // ESTRATEGIA OPTIMIZADA:
+    // 1. Hacemos JOIN de Perfiles, Usuarios y Órdenes.
+    // 2. Filtramos solo órdenes impagas.
+    // 3. Agrupamos por Cliente.
+    // 4. Filtramos (HAVING) solo aquellos cuya suma de deuda sea > 0.
+    // 5. Esto se ejecuta en el motor de base de datos, no en memoria.
+
+    var sql = @"
+        SELECT 
+            cp.UserId, 
+            cp.CreditLimit, 
+            cp.PaymentTermsDays, 
+            cp.IsCreditBlocked, 
+            cp.BlockReason, 
+            cp.LastCreditCheckAt,
+            u.BillingName as ClientName,
+            SUM(o.TotalAmount) as CurrentDebt
+        FROM ClientProfiles cp
+        INNER JOIN Users u ON cp.UserId = u.Id
+        INNER JOIN Orders o ON o.ClientId = cp.UserId
+        WHERE o.PaymentStatus NOT IN ('Paid', 'Cancelled') -- Solo deuda activa
+        GROUP BY 
+            cp.UserId, 
+            cp.CreditLimit, 
+            cp.PaymentTermsDays, 
+            cp.IsCreditBlocked, 
+            cp.BlockReason, 
+            cp.LastCreditCheckAt, 
+            u.BillingName
+        HAVING SUM(o.TotalAmount) > 0
+        ORDER BY CurrentDebt DESC";
+
+    return await conn.QueryAsync<ClientProfile>(sql);
+  }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Infrastructure/Repositories/OrderRepository.cs b/src/SIGCM.Infrastructure/Repositories/OrderRepository.cs
new file mode 100644
index 0000000..61007e9
--- /dev/null
+++ b/src/SIGCM.Infrastructure/Repositories/OrderRepository.cs
@@ -0,0 +1,101 @@
+using Dapper;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+using SIGCM.Infrastructure.Data;
+
+namespace SIGCM.Infrastructure.Repositories;
+
+public class OrderRepository : IOrderRepository
+{
+  private readonly IDbConnectionFactory _db;
+
+  public OrderRepository(IDbConnectionFactory db) => _db = db;
+
+  public async Task<int> CreateOrderAsync(Order order, IEnumerable<OrderItem> items)
+  {
+    using var conn = _db.CreateConnection();
+    conn.Open();
+    using var transaction = conn.BeginTransaction();
+
+    try
+    {
+      // 1. Obtener siguiente número de secuencia de forma atómica
+      // Formato: ORD-{AÑO}-{SECUENCIA} (Ej: ORD-2026-000015)
+      var nextVal = await conn.ExecuteScalarAsync<int>(
+          "SELECT NEXT VALUE FOR OrderNumberSeq", transaction: transaction);
+
+      var orderNumber = $"ORD-{DateTime.UtcNow.Year}-{nextVal:D6}";
+      order.OrderNumber = orderNumber;
+
+      // 2. Insertar Cabecera
+      var sqlOrder = @"
+            INSERT INTO Orders 
+            (OrderNumber, ClientId, SellerId, CreatedAt, DueDate, TotalNet, TotalTax, TotalAmount, PaymentStatus, FulfillmentStatus, Notes)
+            VALUES 
+            (@OrderNumber, @ClientId, @SellerId, GETUTCDATE(), @DueDate, @TotalNet, @TotalTax, @TotalAmount, @PaymentStatus, @FulfillmentStatus, @Notes);
+            SELECT CAST(SCOPE_IDENTITY() as int);";
+
+      var orderId = await conn.QuerySingleAsync<int>(sqlOrder, order, transaction);
+
+      // 3. Insertar Items (Código existente...)
+      var sqlItem = @"
+            INSERT INTO OrderItems 
+            (OrderId, ProductId, CompanyId, RelatedEntityId, RelatedEntityType, Quantity, UnitPrice, TaxRate, SubTotal, CommissionPercentage, CommissionAmount)
+            VALUES 
+            (@OrderId, @ProductId, @CompanyId, @RelatedEntityId, @RelatedEntityType, @Quantity, @UnitPrice, @TaxRate, @SubTotal, @CommissionPercentage, @CommissionAmount)";
+
+      foreach (var item in items)
+      {
+        item.OrderId = orderId;
+        await conn.ExecuteAsync(sqlItem, item, transaction);
+      }
+
+      transaction.Commit();
+      return orderId;
+    }
+    catch
+    {
+      transaction.Rollback();
+      throw;
+    }
+  }
+
+  public async Task<Order?> GetByIdAsync(int id)
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+            SELECT o.*, u.Username as SellerName, c.BillingName as ClientName
+            FROM Orders o
+            LEFT JOIN Users u ON o.SellerId = u.Id
+            LEFT JOIN Users c ON o.ClientId = c.Id
+            WHERE o.Id = @Id";
+    return await conn.QuerySingleOrDefaultAsync<Order>(sql, new { Id = id });
+  }
+
+  public async Task<IEnumerable<Order>> GetByClientIdAsync(int clientId)
+  {
+    using var conn = _db.CreateConnection();
+    return await conn.QueryAsync<Order>(
+        "SELECT * FROM Orders WHERE ClientId = @ClientId ORDER BY CreatedAt DESC",
+        new { ClientId = clientId });
+  }
+
+  public async Task<IEnumerable<OrderItem>> GetItemsByOrderIdAsync(int orderId)
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+            SELECT oi.*, p.Name as ProductName 
+            FROM OrderItems oi
+            JOIN Products p ON oi.ProductId = p.Id
+            WHERE oi.OrderId = @OrderId";
+    return await conn.QueryAsync<OrderItem>(sql, new { OrderId = orderId });
+  }
+
+  public async Task UpdatePaymentStatusAsync(int orderId, string status)
+  {
+    using var conn = _db.CreateConnection();
+    await conn.ExecuteAsync(
+        "UPDATE Orders SET PaymentStatus = @Status WHERE Id = @Id",
+        new { Id = orderId, Status = status });
+  }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Infrastructure/Repositories/ProductRepository.cs b/src/SIGCM.Infrastructure/Repositories/ProductRepository.cs
new file mode 100644
index 0000000..54482dd
--- /dev/null
+++ b/src/SIGCM.Infrastructure/Repositories/ProductRepository.cs
@@ -0,0 +1,129 @@
+using Dapper;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+using SIGCM.Infrastructure.Data;
+
+namespace SIGCM.Infrastructure.Repositories;
+
+public class ProductRepository : IProductRepository
+{
+  private readonly IDbConnectionFactory _db;
+
+  public ProductRepository(IDbConnectionFactory db) => _db = db;
+
+  public async Task<IEnumerable<Product>> GetAllAsync()
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+            SELECT p.*, c.Name as CompanyName, pt.Code as TypeCode
+            FROM Products p
+            JOIN Companies c ON p.CompanyId = c.Id
+            JOIN ProductTypes pt ON p.ProductTypeId = pt.Id
+            WHERE p.IsActive = 1";
+    return await conn.QueryAsync<Product>(sql);
+  }
+
+  public async Task<Product?> GetByIdAsync(int id)
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+            SELECT p.*, c.Name as CompanyName, pt.Code as TypeCode
+            FROM Products p
+            JOIN Companies c ON p.CompanyId = c.Id
+            JOIN ProductTypes pt ON p.ProductTypeId = pt.Id
+            WHERE p.Id = @Id";
+    return await conn.QuerySingleOrDefaultAsync<Product>(sql, new { Id = id });
+  }
+
+  public async Task<IEnumerable<Product>> GetByCompanyIdAsync(int companyId)
+  {
+    using var conn = _db.CreateConnection();
+    return await conn.QueryAsync<Product>(
+        "SELECT * FROM Products WHERE CompanyId = @Id AND IsActive = 1",
+        new { Id = companyId });
+  }
+
+  public async Task<int> CreateAsync(Product product)
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+            INSERT INTO Products (CompanyId, ProductTypeId, Name, Description, SKU, BasePrice, TaxRate, IsActive)
+            VALUES (@CompanyId, @ProductTypeId, @Name, @Description, @SKU, @BasePrice, @TaxRate, @IsActive);
+            SELECT CAST(SCOPE_IDENTITY() as int);";
+    return await conn.QuerySingleAsync<int>(sql, product);
+  }
+
+  public async Task UpdateAsync(Product product)
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+            UPDATE Products 
+            SET Name = @Name, Description = @Description, BasePrice = @BasePrice, TaxRate = @TaxRate, IsActive = @IsActive
+            WHERE Id = @Id";
+    await conn.ExecuteAsync(sql, product);
+  }
+
+  public async Task<IEnumerable<Company>> GetAllCompaniesAsync()
+  {
+    using var conn = _db.CreateConnection();
+    return await conn.QueryAsync<Company>("SELECT * FROM Companies WHERE IsActive = 1");
+  }
+
+  public async Task<IEnumerable<ProductBundle>> GetBundleComponentsAsync(int parentProductId)
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+        SELECT pb.*, p.*
+        FROM ProductBundles pb
+        JOIN Products p ON pb.ChildProductId = p.Id
+        WHERE pb.ParentProductId = @ParentProductId";
+
+    // Usamos Dapper Multi-Mapping para llenar el objeto ChildProduct
+    return await conn.QueryAsync<ProductBundle, Product, ProductBundle>(
+        sql,
+        (bundle, product) =>
+        {
+          bundle.ChildProduct = product;
+          return bundle;
+        },
+        new { ParentProductId = parentProductId },
+        splitOn: "Id" // Asumiendo que p.Id es la columna donde empieza el split
+    );
+  }
+
+  public async Task AddComponentToBundleAsync(ProductBundle bundle)
+  {
+    using var conn = _db.CreateConnection();
+    // 1. Validar que no exista ya esa relación para evitar duplicados
+    var exists = await conn.ExecuteScalarAsync<int>(
+        @"SELECT COUNT(1) FROM ProductBundles 
+          WHERE ParentProductId = @ParentProductId AND ChildProductId = @ChildProductId",
+        bundle);
+
+    if (exists > 0)
+    {
+      // En producción, actualizamos la cantidad en lugar de fallar o duplicar
+      var updateSql = @"
+            UPDATE ProductBundles 
+            SET Quantity = @Quantity, FixedAllocationAmount = @FixedAllocationAmount
+            WHERE ParentProductId = @ParentProductId AND ChildProductId = @ChildProductId";
+      await conn.ExecuteAsync(updateSql, bundle);
+    }
+    else
+    {
+      // Insertar nueva relación
+      var insertSql = @"
+            INSERT INTO ProductBundles (ParentProductId, ChildProductId, Quantity, FixedAllocationAmount) 
+            VALUES (@ParentProductId, @ChildProductId, @Quantity, @FixedAllocationAmount)";
+      await conn.ExecuteAsync(insertSql, bundle);
+    }
+  }
+
+  public async Task RemoveComponentFromBundleAsync(int bundleId, int childProductId)
+  {
+    using var conn = _db.CreateConnection();
+    await conn.ExecuteAsync(
+        "DELETE FROM ProductBundles WHERE ParentProductId = @ParentId AND ChildProductId = @ChildId",
+        new { ParentId = bundleId, ChildId = childProductId });
+  }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Infrastructure/Repositories/SellerRepository.cs b/src/SIGCM.Infrastructure/Repositories/SellerRepository.cs
new file mode 100644
index 0000000..9f4d671
--- /dev/null
+++ b/src/SIGCM.Infrastructure/Repositories/SellerRepository.cs
@@ -0,0 +1,78 @@
+using Dapper;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+using SIGCM.Infrastructure.Data;
+
+namespace SIGCM.Infrastructure.Repositories;
+
+public class SellerRepository : ISellerRepository
+{
+  private readonly IDbConnectionFactory _db;
+  public SellerRepository(IDbConnectionFactory db) => _db = db;
+
+  public async Task<SellerProfile?> GetProfileAsync(int userId)
+  {
+    using var conn = _db.CreateConnection();
+    var sql = @"
+            SELECT sp.*, u.Username 
+            FROM SellerProfiles sp
+            JOIN Users u ON sp.UserId = u.Id
+            WHERE sp.UserId = @UserId";
+    return await conn.QuerySingleOrDefaultAsync<SellerProfile>(sql, new { UserId = userId });
+  }
+
+  public async Task UpsertProfileAsync(SellerProfile profile)
+  {
+    using var conn = _db.CreateConnection();
+    var exists = await conn.ExecuteScalarAsync<int>(
+        "SELECT COUNT(1) FROM SellerProfiles WHERE UserId = @UserId", new { profile.UserId });
+
+    if (exists > 0)
+    {
+      var sql = @"
+                UPDATE SellerProfiles 
+                SET SellerCode = @SellerCode, 
+                    BaseCommissionPercentage = @BaseCommissionPercentage,
+                    IsActive = @IsActive
+                WHERE UserId = @UserId";
+      await conn.ExecuteAsync(sql, profile);
+    }
+    else
+    {
+      var sql = @"
+                INSERT INTO SellerProfiles (UserId, SellerCode, BaseCommissionPercentage, IsActive)
+                VALUES (@UserId, @SellerCode, @BaseCommissionPercentage, @IsActive)";
+      await conn.ExecuteAsync(sql, profile);
+    }
+  }
+
+  public async Task<IEnumerable<dynamic>> GetAllActiveSellersAsync()
+  {
+    using var conn = _db.CreateConnection();
+    // Traemos usuarios que tienen perfil de vendedor O que tienen rol de Vendedor/Cajero
+    var sql = @"
+            SELECT u.Id, u.Username, sp.SellerCode, ISNULL(sp.BaseCommissionPercentage, 0) as CommissionRate
+            FROM Users u
+            LEFT JOIN SellerProfiles sp ON u.Id = sp.UserId
+            WHERE u.IsActive = 1 
+              AND (sp.IsActive = 1 OR u.Role IN ('Vendedor', 'Cajero'))
+            ORDER BY u.Username";
+    return await conn.QueryAsync(sql);
+  }
+
+  public async Task<decimal> GetMonthlySalesAsync(int sellerId, DateTime date)
+  {
+    using var conn = _db.CreateConnection();
+    var start = new DateTime(date.Year, date.Month, 1);
+    var end = start.AddMonths(1).AddSeconds(-1);
+
+    var sql = @"
+            SELECT ISNULL(SUM(TotalAmount), 0)
+            FROM Orders
+            WHERE SellerId = @SellerId 
+              AND CreatedAt BETWEEN @Start AND @End
+              AND PaymentStatus = 'Paid'"; // Solo ventas cobradas suman para comisión (regla común)
+
+    return await conn.ExecuteScalarAsync<decimal>(sql, new { SellerId = sellerId, Start = start, End = end });
+  }
+}
\ No newline at end of file
diff --git a/src/SIGCM.Infrastructure/Services/OrderService.cs b/src/SIGCM.Infrastructure/Services/OrderService.cs
new file mode 100644
index 0000000..f69e584
--- /dev/null
+++ b/src/SIGCM.Infrastructure/Services/OrderService.cs
@@ -0,0 +1,222 @@
+using SIGCM.Application.DTOs;
+using SIGCM.Application.Interfaces;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+
+namespace SIGCM.Infrastructure.Services;
+
+public class OrderService : IOrderService
+{
+  private readonly IOrderRepository _orderRepo;
+  private readonly IProductRepository _productRepo;
+  private readonly ISellerRepository _sellerRepo;
+  private readonly IClientProfileRepository _clientRepo;
+
+  public OrderService(IOrderRepository orderRepo, IProductRepository productRepo, ISellerRepository sellerRepo, IClientProfileRepository clientRepo)
+  {
+    _orderRepo = orderRepo;
+    _productRepo = productRepo;
+    _sellerRepo = sellerRepo;
+    _clientRepo = clientRepo;
+  }
+
+  public async Task<OrderResultDto> CreateOrderAsync(CreateOrderDto dto)
+  {
+    // 1. Preparar la cabecera
+    var order = new Order
+    {
+      OrderNumber = GenerateOrderNumber(),
+      ClientId = dto.ClientId,
+      SellerId = dto.SellerId,
+      CreatedAt = DateTime.UtcNow,
+      DueDate = dto.DueDate,
+      Notes = dto.Notes,
+      // Estado inicial: Si es pago directo -> 'Paid', sino 'Pending'
+      PaymentStatus = dto.IsDirectPayment ? "Paid" : "Pending",
+      FulfillmentStatus = "Pending"
+    };
+
+    // Obtener perfil del vendedor para saber su % de comisión
+    decimal sellerCommissionRate = 0;
+    var sellerProfile = await _sellerRepo.GetProfileAsync(dto.SellerId);
+    if (sellerProfile != null && sellerProfile.IsActive)
+    {
+      sellerCommissionRate = sellerProfile.BaseCommissionPercentage;
+    }
+
+    // --- VALIDACIÓN DE CRÉDITO ---
+    if (!dto.IsDirectPayment) // Si es Cuenta Corriente
+    {
+      var profile = await _clientRepo.GetProfileAsync(dto.ClientId);
+
+      // 1. Verificar si existe perfil financiero
+      if (profile == null)
+      {
+        // Opción A: Bloquear si no tiene perfil (Estricto)
+        // Opción B: Permitir si el sistema asume límite 0 o default (Flexible)
+        // Vamos con opción Estricta para obligar al alta administrativa
+        throw new InvalidOperationException("El cliente no tiene habilitada la Cuenta Corriente (Falta Perfil Financiero).");
+      }
+
+      // 2. Verificar bloqueo manual (Legales, Mora, etc)
+      if (profile.IsCreditBlocked)
+      {
+        throw new InvalidOperationException($"Crédito BLOQUEADO para este cliente. Motivo: {profile.BlockReason}");
+      }
+
+      // 3. Calcular Deuda Actual + Nueva Orden
+      // Nota: Necesitamos calcular el total de la orden actual ANTES de validar
+      // (Para no duplicar código, calculamos totales primero y validamos antes de guardar)
+    }
+
+    var orderItems = new List<OrderItem>();
+    decimal totalNet = 0;
+    decimal totalTax = 0;
+
+    // 2. Procesar ítems y calcular montos reales
+    foreach (var itemDto in dto.Items)
+    {
+      var product = await _productRepo.GetByIdAsync(itemDto.ProductId);
+      if (product == null) throw new Exception($"Producto {itemDto.ProductId} no encontrado.");
+
+      // DETECCIÓN: ¿Es un Combo?
+      if (product.TypeCode == "BUNDLE")
+      {
+        // 1. Obtener componentes
+        var components = await _productRepo.GetBundleComponentsAsync(product.Id);
+        if (!components.Any()) throw new Exception($"El combo {product.Name} no tiene componentes definidos.");
+
+        // 2. Calcular totales base para prorrateo
+        // El precio al que vendemos el combo (ej: $1000)
+        decimal bundleSellPrice = product.BasePrice;
+
+        // La suma de los precios de lista de los componentes (ej: $600 + $600 = $1200)
+        decimal totalComponentsBasePrice = components.Sum(c => c.ChildProduct!.BasePrice * c.Quantity);
+
+        if (totalComponentsBasePrice == 0) totalComponentsBasePrice = 1; // Evitar div/0
+
+        // 3. Iterar componentes y crear ítems individuales ("Explosión")
+        foreach (var comp in components)
+        {
+          var child = comp.ChildProduct!;
+
+          // Lógica de Prorrateo:
+          // (PrecioBaseHijo / PrecioBaseTotalHijos) * PrecioVentaCombo
+          // Ej: (600 / 1200) * 1000 = $500
+          decimal allocatedUnitPrice;
+
+          if (comp.FixedAllocationAmount.HasValue)
+          {
+            allocatedUnitPrice = comp.FixedAllocationAmount.Value;
+          }
+          else
+          {
+            decimal ratio = child.BasePrice / totalComponentsBasePrice;
+            allocatedUnitPrice = bundleSellPrice * ratio;
+          }
+
+          // Calcular línea para el componente
+          decimal qty = itemDto.Quantity * comp.Quantity; // Cantidad pedida * Cantidad en combo
+          decimal subTotal = allocatedUnitPrice * qty;
+          decimal taxAmount = subTotal * (child.TaxRate / 100m);
+
+          totalNet += subTotal;
+          totalTax += taxAmount;
+
+          orderItems.Add(new OrderItem
+          {
+            ProductId = child.Id,
+            CompanyId = child.CompanyId,
+            Quantity = qty,
+            UnitPrice = allocatedUnitPrice,
+            TaxRate = child.TaxRate,
+            SubTotal = subTotal + taxAmount,
+            RelatedEntityId = itemDto.RelatedEntityId,
+            RelatedEntityType = itemDto.RelatedEntityType,
+            ProductName = $"{product.Name} > {child.Name}" // Traza para saber que vino de un combo
+                                                           // La comisión se calculará después si es necesario
+          });
+        }
+      }
+      else
+      {
+        // --- LÓGICA ESTÁNDAR (PRODUCTO NORMAL) ---
+        decimal unitPrice = product.BasePrice;
+        decimal subTotalNet = unitPrice * itemDto.Quantity;
+        decimal taxAmount = subTotalNet * (product.TaxRate / 100m);
+
+        totalNet += subTotalNet;
+        totalTax += taxAmount;
+
+        // Cálculo Comisión Vendedor
+        decimal commissionAmt = subTotalNet * (sellerCommissionRate / 100m);
+
+        orderItems.Add(new OrderItem
+        {
+          ProductId = product.Id,
+          CompanyId = product.CompanyId,
+          Quantity = itemDto.Quantity,
+          UnitPrice = unitPrice,
+          TaxRate = product.TaxRate,
+          SubTotal = subTotalNet + taxAmount,
+          RelatedEntityId = itemDto.RelatedEntityId,
+          RelatedEntityType = itemDto.RelatedEntityType,
+          CommissionPercentage = sellerCommissionRate,
+          CommissionAmount = commissionAmt,
+          ProductName = product.Name
+        });
+      }
+    }
+
+    // 3. Finalizar totales de cabecera
+    order.TotalNet = totalNet;
+    order.TotalTax = totalTax;
+    order.TotalAmount = totalNet + totalTax;
+
+    // --- VALIDACIÓN DE LÍMITE (Post-Cálculo) ---
+    if (!dto.IsDirectPayment)
+    {
+      var profile = await _clientRepo.GetProfileAsync(dto.ClientId);
+      if (profile != null)
+      {
+        var currentDebt = await _clientRepo.CalculateCurrentDebtAsync(dto.ClientId);
+        var totalAmount = totalNet + totalTax;
+        var newTotalDebt = currentDebt + totalAmount;
+
+        if (newTotalDebt > profile.CreditLimit)
+        {
+          // AQUÍ OCURRE EL "CORTE DE VENTAS"
+          throw new InvalidOperationException(
+              $"Límite de crédito excedido. " +
+              $"Límite: ${profile.CreditLimit:N2} | " +
+              $"Deuda Actual: ${currentDebt:N2} | " +
+              $"Nuevo Total: ${newTotalDebt:N2}");
+        }
+
+        // Si pasa, asignamos fecha de vencimiento automática si no vino en el DTO
+        if (!order.DueDate.HasValue)
+        {
+          order.DueDate = DateTime.UtcNow.AddDays(profile.PaymentTermsDays);
+        }
+      }
+    }
+
+    // 4. Guardar en Base de Datos
+    var orderId = await _orderRepo.CreateOrderAsync(order, orderItems);
+
+    return new OrderResultDto
+    {
+      OrderId = orderId,
+      OrderNumber = order.OrderNumber,
+      TotalAmount = order.TotalAmount,
+      Status = order.PaymentStatus
+    };
+  }
+
+  private string GenerateOrderNumber()
+  {
+    // Generador simple: ORD-AÑO-RANDOM
+    // En producción idealmente usaríamos una secuencia de SQL
+    return $"ORD-{DateTime.Now.Year}-{Guid.NewGuid().ToString().Substring(0, 8).ToUpper()}";
+  }
+}
\ No newline at end of file