diff --git a/app/src/main/java/es/fpsumma/dam2/intro/MainActivity.kt b/app/src/main/java/es/fpsumma/dam2/intro/MainActivity.kt
index 0462544..5d5f7f2 100644
--- a/app/src/main/java/es/fpsumma/dam2/intro/MainActivity.kt
+++ b/app/src/main/java/es/fpsumma/dam2/intro/MainActivity.kt
@@ -7,7 +7,7 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.ui.Modifier
-import com.ivancorrales.basicjetpackcompose.ui.theme.IntroTheme
+import es.fpsumma.dam2.intro.ui.theme.IntroTheme
 import es.fpsumma.dam2.intro.ui.screens.CounterScreen
 
 class MainActivity : ComponentActivity() {
diff --git a/app/src/main/java/es/fpsumma/dam2/intro/ui/screens/CounterScreen.kt b/app/src/main/java/es/fpsumma/dam2/intro/ui/screens/CounterScreen.kt
index 404c688..46355ca 100644
--- a/app/src/main/java/es/fpsumma/dam2/intro/ui/screens/CounterScreen.kt
+++ b/app/src/main/java/es/fpsumma/dam2/intro/ui/screens/CounterScreen.kt
@@ -1,10 +1,13 @@
 package es.fpsumma.dam2.intro.ui.screens
 
+import android.graphics.Color
+import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.*
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.Refresh
 
 import androidx.compose.material3.*
+import androidx.compose.material3.FilledTonalButton
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -12,12 +15,13 @@ import androidx.compose.ui.semantics.contentDescription
 import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import es.fpsumma.dam2.intro.ui.theme.IntroTheme
 
 
 @Composable
 fun CounterScreen() {
-    var count by remember { mutableStateOf(0) }
-
+    var count by remember { mutableStateOf(5) }
+    var user : String="Raúl";
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -25,29 +29,50 @@ fun CounterScreen() {
         horizontalAlignment = Alignment.CenterHorizontally,
         verticalArrangement = Arrangement.spacedBy(16.dp)
     ) {
-        Text("Hola mi amig@!", style = MaterialTheme.typography.headlineMedium)
+        Text("Hola $user!", style = MaterialTheme.typography.headlineMedium)
         Text("Contador: $count", style = MaterialTheme.typography.titleLarge)
         Row(horizontalArrangement = Arrangement.spacedBy(12.dp)) {
-            Button(
-                onClick = {},
-                modifier = Modifier.semantics { contentDescription = "Incrementar" }
-            ) { Text("+1") }
-
-            FilledTonalButton(
-                onClick = {},
-                modifier = Modifier.semantics { contentDescription = "Decrementar" }
-            ) { Text("-1") }
-
-            IconButton(
-                onClick = {},
-                modifier = Modifier.size(48.dp)
-            ) {
-                Icon(Icons.Outlined.Refresh, contentDescription = "Reiniciar contador")
-            }
+                IntroTheme{
+                Button(
+                    onClick = { count = count + 1 },
+                    modifier = Modifier.semantics { contentDescription = "Incrementar" },
+                    colors = ButtonDefaults.buttonColors(
+                        containerColor = Color.(0xFF5DFF00),
+                    ),
+                ) { Text("+1") }
+
+                FilledTonalButton(
+                    onClick = {
+                        if (count > 0) {
+                            count = count - 1
+                        }
+                    },
+                    modifier = Modifier.semantics { contentDescription = "Decrementar" }
+                ) { Text("-1") }}
+                IconButton(
+                    onClick = { count = 0 },
+                    modifier = Modifier.size(48.dp)
+                ) {
+                    Icon(Icons.Outlined.Refresh, contentDescription = "Reiniciar contador")
+
+                }
+                Button(
+                    modifier = Modifier.width((100 + count * 10).dp.coerceAtMost(500.dp)),
+                    content = {},
+                )
+
+
         }
     }
 }
 
+
+
+@Composable
+fun IntoTheme(content: @Composable () -> Unit) {
+    TODO("Not yet implemented")
+}
+
 @Preview(showBackground = true)
 @Composable
 private fun CounterPreview() {
diff --git a/app/src/main/java/es/fpsumma/dam2/intro/ui/screens/InputDemoScreen.kt b/app/src/main/java/es/fpsumma/dam2/intro/ui/screens/InputDemoScreen.kt
index c11ccc9..ee0433e 100644
--- a/app/src/main/java/es/fpsumma/dam2/intro/ui/screens/InputDemoScreen.kt
+++ b/app/src/main/java/es/fpsumma/dam2/intro/ui/screens/InputDemoScreen.kt
@@ -1,5 +1,6 @@
 package es.fpsumma.dam2.intro.ui.screens
 
+
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.text.KeyboardActions
 import androidx.compose.foundation.text.KeyboardOptions
@@ -16,12 +17,12 @@ import androidx.compose.ui.unit.dp
 fun InputDemoScreen() {
     val focusManager = LocalFocusManager.current
 
-    var name by rememberSaveable { mutableStateOf("") }
+    var user by rememberSaveable { mutableStateOf("") }
     var greeting by remember { mutableStateOf<String?>(null) }
 
     // Calcula el error en función del texto (sin estado extra) Pista -> derivedStateOf
     // TODO: valida name: no vacío, mínimo 3 caracteres (trim).
-    val error: String? by remember(name) {
+    val error: String? by remember(user) {
         derivedStateOf {
             null
         }
@@ -29,15 +30,15 @@ fun InputDemoScreen() {
 
     fun submit() {
         if (error == null) {
-            greeting = "Hola,  👋"
+            greeting = "Hola, $user 👋"
             focusManager.clearFocus()
         }
     }
 
     Column(Modifier.fillMaxSize().padding(24.dp)) {
         OutlinedTextField(
-            value = name,
-            onValueChange = { name = it },
+            value = user,
+            onValueChange = { user = it },
             label = { Text("Tu nombre") },
             isError = error != null,
             supportingText = { if (error != null) Text(error!!) },
@@ -54,7 +55,7 @@ fun InputDemoScreen() {
             Text("Saludar")
         }
         Spacer(Modifier.height(16.dp))
-        if (error == null && name.isNotBlank()) {
+        if (error == null && user.isNotBlank()) {
             Text(greeting?: "" )
         }
     }
diff --git a/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Color.kt b/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Color.kt
index c45da49..9549b2a 100644
--- a/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Color.kt
+++ b/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Color.kt
@@ -1,4 +1,4 @@
-package com.ivancorrales.basicjetpackcompose.ui.theme
+package es.fpsumma.dam2.intro.ui.theme
 
 import androidx.compose.ui.graphics.Color
 
@@ -8,4 +8,6 @@ val Pink80 = Color(0xFFEFB8C8)
 
 val Purple40 = Color(0xFF6650a4)
 val PurpleGrey40 = Color(0xFF625b71)
-val Pink40 = Color(0xFF7D5260)
\ No newline at end of file
+val Pink40 = Color(0xFF7D5260)
+
+val Green = Color(0xFF5DFF00)
\ No newline at end of file
diff --git a/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Theme.kt b/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Theme.kt
index cb6c5d5..fecc0be 100644
--- a/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Theme.kt
+++ b/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Theme.kt
@@ -1,8 +1,6 @@
-package com.ivancorrales.basicjetpackcompose.ui.theme
+package es.fpsumma.dam2.intro.ui.theme
 
-import android.app.Activity
 import android.os.Build
-import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.material3.ColorScheme
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.darkColorScheme
@@ -10,19 +8,17 @@ import androidx.compose.material3.dynamicDarkColorScheme
 import androidx.compose.material3.dynamicLightColorScheme
 import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
-import com.ivancorrales.basicjetpackcompose.ui.theme.LightColorScheme
 
 private val DarkColorScheme = darkColorScheme(
-    primary = Purple80,
+    primary = Green, //Purple80,
     secondary = PurpleGrey80,
     tertiary = Pink80
 )
 
 private val LightColorScheme = lightColorScheme(
-    primary = Purple40,
-    secondary = PurpleGrey40,
+    primary = Green, //Purple40,
+    secondary = Green, //PurpleGrey40,
     tertiary = Pink40
 )
 
diff --git a/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Type.kt b/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Type.kt
index 7128d5f..d0fa6ea 100644
--- a/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Type.kt
+++ b/app/src/main/java/es/fpsumma/dam2/intro/ui/theme/Type.kt
@@ -1,4 +1,4 @@
-package com.ivancorrales.basicjetpackcompose.ui.theme
+package es.fpsumma.dam2.intro.ui.theme
 
 import androidx.compose.material3.Typography
 import androidx.compose.ui.text.TextStyle
diff --git a/app/src/main/res/values-night/themes.xml b/app/src/main/res/values-night/themes.xml
index 5a0be97..9c45af4 100644
--- a/app/src/main/res/values-night/themes.xml
+++ b/app/src/main/res/values-night/themes.xml
@@ -2,8 +2,8 @@
     <!-- Base application theme. -->
     <style name="Theme.Intro" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
         <!-- Primary brand color. -->
-        <item name="colorPrimary">@color/purple_200</item>
-        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorPrimary">@color/green_200</item>
+        <item name="colorPrimaryVariant">@color/green_500</item>
         <item name="colorOnPrimary">@color/black</item>
         <!-- Secondary brand color. -->
         <item name="colorSecondary">@color/teal_200</item>
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index f8c6127..93ef8b7 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -7,4 +7,6 @@
     <color name="teal_700">#FF018786</color>
     <color name="black">#FF000000</color>
     <color name="white">#FFFFFFFF</color>
+    <color name="green_500">#4CAF50</color>
+    <color name="green_200">#8BC34A</color>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
index f07a049..276926d 100644
--- a/app/src/main/res/values/themes.xml
+++ b/app/src/main/res/values/themes.xml
@@ -3,7 +3,7 @@
     <style name="Theme.Intro" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
         <!-- Primary brand color. -->
         <item name="colorPrimary">@color/purple_500</item>
-        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorPrimaryVariant">@color/green_500</item>
         <item name="colorOnPrimary">@color/white</item>
         <!-- Secondary brand color. -->
         <item name="colorSecondary">@color/teal_200</item>
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 64452d1..37b64a8 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -12,6 +12,7 @@ appcompat = "1.7.1"
 material = "1.13.0"
 activity = "1.11.0"
 constraintlayout = "2.2.1"
+material3 = "1.4.0"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
@@ -32,6 +33,7 @@ androidx-appcompat = { group = "androidx.appcompat", name = "appcompat", version
 material = { group = "com.google.android.material", name = "material", version.ref = "material" }
 androidx-activity = { group = "androidx.activity", name = "activity", version.ref = "activity" }
 androidx-constraintlayout = { group = "androidx.constraintlayout", name = "constraintlayout", version.ref = "constraintlayout" }
+androidx-compose-material3 = { group = "androidx.compose.material3", name = "material3", version.ref = "material3" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }