diff --git a/src/main/java/com/ieslamar/GestionInventario/entities/Categoria.java b/src/main/java/com/ieslamar/GestionInventario/entities/Categoria.java
new file mode 100644
index 0000000..18952be
--- /dev/null
+++ b/src/main/java/com/ieslamar/GestionInventario/entities/Categoria.java
@@ -0,0 +1,24 @@
+package com.ieslamar.GestionInventario.entities;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Entity
+@Table(name = "categoria")
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class Categoria {
+    @Id
+    @Column(name = "idcategoria")
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    private String nombre;
+
+}
diff --git a/src/main/java/com/ieslamar/GestionInventario/entities/Departamento.java b/src/main/java/com/ieslamar/GestionInventario/entities/Departamento.java
index 0e4c96e..117ae9b 100644
--- a/src/main/java/com/ieslamar/GestionInventario/entities/Departamento.java
+++ b/src/main/java/com/ieslamar/GestionInventario/entities/Departamento.java
@@ -14,6 +14,7 @@ import lombok.Setter;
 @AllArgsConstructor
 public class Departamento {
     @Id
+    @Column(name = "iddepartamentos")
     @GeneratedValue(strategy = GenerationType.IDENTITY)  // ID autoincremental
     private int id;
 
diff --git a/src/main/java/com/ieslamar/GestionInventario/entities/Item.java b/src/main/java/com/ieslamar/GestionInventario/entities/Item.java
new file mode 100644
index 0000000..6ec4613
--- /dev/null
+++ b/src/main/java/com/ieslamar/GestionInventario/entities/Item.java
@@ -0,0 +1,39 @@
+package com.ieslamar.GestionInventario.entities;
+
+
+import jakarta.persistence.*;
+import lombok.*;
+
+import java.util.Date;
+
+@Entity
+@Table(name = "item")
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class Item {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "iditem")
+    private Long id;
+
+    @Column(name = "fecha_alta")
+    private Date fechaAlta;
+
+    @Column(name = "fecha_modificacion")
+    private Date fechaModificacion;
+
+    @ManyToOne
+    @JoinColumn(name = "users_id")
+    private User usuario;
+
+    @ManyToOne
+    @JoinColumn(name = "ubicacion_idubicacion")
+    private Ubicacion ubicacion;
+
+    @ManyToOne
+    @JoinColumn(name = "producto_idproducto")
+    private Producto producto;
+}
diff --git a/src/main/java/com/ieslamar/GestionInventario/entities/Propiedad.java b/src/main/java/com/ieslamar/GestionInventario/entities/Propiedad.java
new file mode 100644
index 0000000..203f57c
--- /dev/null
+++ b/src/main/java/com/ieslamar/GestionInventario/entities/Propiedad.java
@@ -0,0 +1,26 @@
+package com.ieslamar.GestionInventario.entities;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Entity
+@Table(name = "propiedad")  // Nombre de la tabla en MySQL
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class Propiedad {
+    @Id
+    @Column(name = "idpropiedad")
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column
+    private String nombre;
+
+    @ManyToOne
+    @JoinColumn(name = "tipodato_idtipodato")
+    private TipoDato tipoDato;
+}
diff --git a/src/main/java/com/ieslamar/GestionInventario/entities/TipoDato.java b/src/main/java/com/ieslamar/GestionInventario/entities/TipoDato.java
new file mode 100644
index 0000000..ea21af7
--- /dev/null
+++ b/src/main/java/com/ieslamar/GestionInventario/entities/TipoDato.java
@@ -0,0 +1,23 @@
+package com.ieslamar.GestionInventario.entities;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Entity
+@Table(name = "tipodato")
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class TipoDato {
+    @Id
+    @Column(name = "idtipodato")
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "tipo_dato")
+    private String tipoDato;
+}
diff --git a/src/main/java/com/ieslamar/GestionInventario/entities/Ubicacion.java b/src/main/java/com/ieslamar/GestionInventario/entities/Ubicacion.java
new file mode 100644
index 0000000..bdc4675
--- /dev/null
+++ b/src/main/java/com/ieslamar/GestionInventario/entities/Ubicacion.java
@@ -0,0 +1,29 @@
+package com.ieslamar.GestionInventario.entities;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Entity
+@Table(name = "ubicacion")
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class Ubicacion {
+    @Id
+    @Column(name = "idubicacion")
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    private String nombre;
+
+    @Column(nullable = true)
+    private String descripcion;
+
+    @Column(nullable = true)
+    private String notas;
+}
diff --git a/src/main/java/com/ieslamar/GestionInventario/entities/User.java b/src/main/java/com/ieslamar/GestionInventario/entities/User.java
index 1ee3d4a..ef7b43d 100644
--- a/src/main/java/com/ieslamar/GestionInventario/entities/User.java
+++ b/src/main/java/com/ieslamar/GestionInventario/entities/User.java
@@ -27,8 +27,9 @@ public class User {
     @Column(nullable = false, unique = true)  // No se permite emails duplicados
     private String mail;
 
-    @Column(nullable = true)
-    private Integer departamentos_iddepartamentos;
+    @ManyToOne
+    @JoinColumn(name = "departamentos_iddepartamentos", nullable = true) // Nombre de la columna en la tabla `users`
+    private Departamento departamento;
 }
 
 
diff --git a/src/main/java/com/ieslamar/GestionInventario/entities/Valor.java b/src/main/java/com/ieslamar/GestionInventario/entities/Valor.java
new file mode 100644
index 0000000..d551290
--- /dev/null
+++ b/src/main/java/com/ieslamar/GestionInventario/entities/Valor.java
@@ -0,0 +1,29 @@
+package com.ieslamar.GestionInventario.entities;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+@Entity
+@Table(name = "valor")
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class Valor {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "idvalor")
+    private Long id;
+
+    @Column(nullable = false)
+    private String valor;
+
+    @ManyToOne
+    @JoinColumn(name = "propiedad_idpropiedad")
+    private Propiedad propiedad;
+
+    @ManyToOne
+    @JoinColumn(name = "item_iditem")
+    private Item item;
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 9ba348e..98eb346 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -14,7 +14,7 @@ spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
 
 # Configuración de JPA e Hibernate
 spring.jpa.database-platform=org.hibernate.dialect.MySQL8Dialect
-#spring.jpa.hibernate.ddl-auto=update
+spring.jpa.hibernate.ddl-auto=validate
 
 
 
diff --git a/src/main/resources/db/Inventario_bueno_v1.sql b/src/main/resources/db/Inventario_bueno_v1.sql
index 8432c2c..2d5dc47 100644
--- a/src/main/resources/db/Inventario_bueno_v1.sql
+++ b/src/main/resources/db/Inventario_bueno_v1.sql
@@ -95,7 +95,7 @@ DROP TABLE IF EXISTS `inventario`.`ubicacion` ;
 
 CREATE TABLE IF NOT EXISTS `inventario`.`ubicacion` (
   `idubicacion` INT NOT NULL AUTO_INCREMENT,
-  `nombre` VARCHAR(25) NULL,
+  `nombre` VARCHAR(45) NOT NULL,
   `descripcion` VARCHAR(100) NULL,
   `notas` VARCHAR(255) NULL,
   PRIMARY KEY (`idubicacion`))
@@ -109,7 +109,7 @@ DROP TABLE IF EXISTS `inventario`.`categoria` ;
 
 CREATE TABLE IF NOT EXISTS `inventario`.`categoria` (
   `idcategoria` INT NOT NULL AUTO_INCREMENT,
-  `nombre` VARCHAR(45) NULL,
+  `nombre` VARCHAR(45) NOT NULL,
   PRIMARY KEY (`idcategoria`))
 ENGINE = InnoDB;
 
@@ -121,10 +121,10 @@ DROP TABLE IF EXISTS `inventario`.`producto` ;
 
 CREATE TABLE IF NOT EXISTS `inventario`.`producto` (
   `idproducto` INT NOT NULL AUTO_INCREMENT,
-  `nombre` VARCHAR(45) NULL,
-  `productocol` VARCHAR(45) NULL,
+  `nombre` VARCHAR(45) NOT NULL,
   `categoria_idcategoria` INT NOT NULL,
   `departamentos_iddepartamentos` INT NOT NULL,
+  `descripcion` VARCHAR(45) NULL,
   PRIMARY KEY (`idproducto`),
   INDEX `fk_producto_categoria1_idx` (`categoria_idcategoria` ASC) VISIBLE,
   INDEX `fk_producto_departamentos1_idx` (`departamentos_iddepartamentos` ASC) VISIBLE,
@@ -148,7 +148,7 @@ DROP TABLE IF EXISTS `inventario`.`item` ;
 
 CREATE TABLE IF NOT EXISTS `inventario`.`item` (
   `iditem` INT NOT NULL AUTO_INCREMENT,
-  `fecha_alta` DATE NULL,
+  `fecha_alta` DATE NOT NULL,
   `fecha_modificacion` DATE NULL,
   `users_id` BIGINT NOT NULL,
   `ubicacion_idubicacion` INT NOT NULL,
diff --git a/src/main/resources/db/Modelo_Inventario.mwb b/src/main/resources/db/Modelo_Inventario.mwb
index c2c05d6..047425c 100644
Binary files a/src/main/resources/db/Modelo_Inventario.mwb and b/src/main/resources/db/Modelo_Inventario.mwb differ
diff --git a/src/main/resources/static/css/table_style.css b/src/main/resources/static/css/table_style.css
index e54bc30..afd169e 100644
--- a/src/main/resources/static/css/table_style.css
+++ b/src/main/resources/static/css/table_style.css
@@ -49,6 +49,8 @@ table {
     overflow: auto;
     border-radius: 10px;
     margin-bottom: 10px;
+    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
+
 }
 
 .table1 thead {
diff --git a/src/main/resources/templates/home.html b/src/main/resources/templates/home.html
index f213fc8..238c22d 100644
--- a/src/main/resources/templates/home.html
+++ b/src/main/resources/templates/home.html
@@ -7,6 +7,9 @@
 <body>
     <h2>Bienvenido a Gestión de Inventario</h2>
     <div class="container1">
+        <a href="/Inventario/management">
+            <button>Inventario</button>
+        </a>
         <!-- Botón visible solo para Administradores -->
         <div sec:authorize="hasRole('ADMIN')">
             <a href="/Inventario/management">