Final

app/src/main/java/com/example/workouttimer/ui/navigation/AppNavigation.kt

@@ -11,6 +11,7 @@ import com.example.workouttimer.ui.screens.RunningWorkoutScreen
 import com.example.workouttimer.ui.screens.SavedWorkoutsScreen
 import com.example.workouttimer.viewmodel.WorkoutViewModel
 import com.example.workouttimer.ui.screens.WorkoutEditorScreen
+import com.example.workouttimer.ui.screens.PreparationCountdownScreen
 
 class AppNavigation(private val context: Context) {
 
@@ -31,7 +32,12 @@ class AppNavigation(private val context: Context) {
         setScreen(
             HomeScreen(
                 context = context,
-                onShowWorkouts = { showSavedWorkouts() }
+                onShowWorkouts = {
+                    showSavedWorkouts()
+                },
+                onCreateWorkout = {
+                    showCreateWorkout()
+                }
             )
         )
     }
@@ -101,20 +107,32 @@ class AppNavigation(private val context: Context) {
                 context = context,
                 workout = viewModel.currentWorkout,
                 onStart = {
-                    viewModel.startWorkout()
-                    showRunningWorkout()
+                    showPreparationCountdown()
                 },
                 onBack = { showSavedWorkouts() }
             )
         )
     }
 
+    fun showPreparationCountdown() {
+        setScreen(
+            PreparationCountdownScreen(
+                context = context,
+                onSkip = {
+                    viewModel.startWorkout()
+                    showRunningWorkout()
+                }
+            )
+        )
+    }
+
     fun showRunningWorkout() {
         setScreen(
             RunningWorkoutScreen(
                 context = context,
                 workout = viewModel.currentWorkout,
                 exercise = viewModel.getCurrentExercise(),
+                nextExercise = viewModel.getNextExercise(),
                 exerciseNumber = viewModel.currentExerciseIndex + 1,
                 onNextExercise = {
                     viewModel.nextExercise()

app/src/main/java/com/example/workouttimer/ui/screens/FinishedScreen.kt

@@ -6,6 +6,7 @@ import android.widget.Button
 import android.widget.LinearLayout
 import android.widget.TextView
 import com.example.workouttimer.domain.Workout
+import com.example.workouttimer.ui.theme.AppStyle
 
 class FinishedScreen(
     context: Context,
@@ -14,34 +15,33 @@ class FinishedScreen(
 ) : LinearLayout(context) {
 
     init {
-        orientation = VERTICAL
-        gravity = Gravity.CENTER
-        setPadding(48, 48, 48, 48)
+        AppStyle.applyGradientBackground(this)
+        gravity = Gravity.CENTER_VERTICAL
 
         val title = TextView(context)
-        title.text = "Workout beendet!"
-        title.textSize = 32f
-        title.gravity = Gravity.CENTER
+        title.text = "Workout\nDone"
+        AppStyle.headline(title)
+        addView(title)
 
         val workoutText = TextView(context)
-        workoutText.text = workout?.name ?: ""
-        workoutText.textSize = 22f
-        workoutText.gravity = Gravity.CENTER
+        workoutText.text = workout?.name ?: "Training abgeschlossen"
+        AppStyle.title(workoutText)
+        AppStyle.setTextMargin(workoutText)
+        addView(workoutText)
 
         val summary = TextView(context)
         summary.text = "Gute Arbeit. Dein Workout wurde erfolgreich abgeschlossen."
-        summary.textSize = 18f
-        summary.gravity = Gravity.CENTER
+        AppStyle.muted(summary)
+        AppStyle.setTextMargin(summary)
+        addView(summary)
 
         val homeButton = Button(context)
-        homeButton.text = "Zur Startseite"
+        homeButton.text = "Zur Startseite -->"
+        AppStyle.primaryButton(homeButton)
         homeButton.setOnClickListener {
             onBackHome()
         }
 
-        addView(title)
-        addView(workoutText)
-        addView(summary)
         addView(homeButton)
     }
 }

app/src/main/java/com/example/workouttimer/ui/screens/HomeScreen.kt

@@ -2,38 +2,70 @@ package com.example.workouttimer.ui.screens
 
 import android.content.Context
 import android.view.Gravity
-import android.widget.Button
 import android.widget.LinearLayout
+import android.widget.Space
 import android.widget.TextView
+import com.example.workouttimer.ui.theme.AppStyle
 
 class HomeScreen(
     context: Context,
-    onShowWorkouts: () -> Unit
+    onShowWorkouts: () -> Unit,
+    onCreateWorkout: () -> Unit
 ) : LinearLayout(context) {
 
     init {
-        orientation = VERTICAL
-        gravity = Gravity.CENTER
-        setPadding(48, 48, 48, 48)
+        AppStyle.applyGradientBackground(this)
+        gravity = Gravity.CENTER_VERTICAL
+
+        val topSpace = Space(context)
+        topSpace.layoutParams = LayoutParams(
+            LayoutParams.MATCH_PARENT,
+            AppStyle.dp(this, 90)
+        )
 
         val title = TextView(context)
         title.text = "Workout Timer"
-        title.textSize = 32f
-        title.gravity = Gravity.CENTER
+        title.gravity = Gravity.START
+        AppStyle.headline(title)
 
         val subtitle = TextView(context)
-        subtitle.text = "Plane und starte dein Workout"
-        subtitle.textSize = 18f
-        subtitle.gravity = Gravity.CENTER
+        subtitle.text = "Build your own rhythm."
+        subtitle.gravity = Gravity.START
+        AppStyle.muted(subtitle)
+        AppStyle.setTextMargin(subtitle)
 
-        val button = Button(context)
-        button.text = "Gespeicherte Workouts"
-        button.setOnClickListener {
-            onShowWorkouts()
-        }
+        val buttonSpace = Space(context)
+        buttonSpace.layoutParams = LayoutParams(
+            LayoutParams.MATCH_PARENT,
+            AppStyle.dp(this, 32)
+        )
 
+        val showWorkoutsCard = AppStyle.actionCard(
+            context = context,
+            text = "Gespeicherte Workouts",
+            dark = true,
+            onClick = onShowWorkouts
+        )
+
+        val createWorkoutCard = AppStyle.actionCard(
+            context = context,
+            text = "Workout erstellen",
+            dark = false,
+            onClick = onCreateWorkout
+        )
+
+        val bottomNote = TextView(context)
+        bottomNote.text = "time based? rep based? your choice!"
+        bottomNote.gravity = Gravity.START
+        AppStyle.muted(bottomNote)
+        AppStyle.setTextMargin(bottomNote)
+
+        addView(topSpace)
         addView(title)
         addView(subtitle)
-        addView(button)
+        addView(buttonSpace)
+        addView(showWorkoutsCard)
+        addView(createWorkoutCard)
+        addView(bottomNote)
     }
 }

app/src/main/java/com/example/workouttimer/ui/screens/PauseScreen.kt

@@ -5,6 +5,7 @@ import android.view.Gravity
 import android.widget.Button
 import android.widget.LinearLayout
 import android.widget.TextView
+import com.example.workouttimer.ui.theme.AppStyle
 
 class PauseScreen(
     context: Context,
@@ -13,28 +14,34 @@ class PauseScreen(
 ) : LinearLayout(context) {
 
     init {
-        orientation = VERTICAL
-        gravity = Gravity.CENTER
-        setPadding(48, 48, 48, 48)
+        AppStyle.applyGradientBackground(this)
+        gravity = Gravity.CENTER_VERTICAL
 
         val title = TextView(context)
         title.text = "Pause"
-        title.textSize = 32f
-        title.gravity = Gravity.CENTER
+        AppStyle.headline(title)
+        addView(title)
+
+        val info = TextView(context)
+        info.text = "Atme kurz durch. Du kannst jederzeit weitermachen."
+        AppStyle.muted(info)
+        AppStyle.setTextMargin(info)
+        addView(info)
 
         val resumeButton = Button(context)
-        resumeButton.text = "Weiter trainieren"
+        resumeButton.text = "Weiter trainieren -->"
+        AppStyle.primaryButton(resumeButton)
         resumeButton.setOnClickListener {
             onResume()
         }
 
         val finishButton = Button(context)
         finishButton.text = "Workout beenden"
+        AppStyle.secondaryButton(finishButton)
         finishButton.setOnClickListener {
             onFinish()
         }
 
-        addView(title)
         addView(resumeButton)
         addView(finishButton)
     }

app/src/main/java/com/example/workouttimer/ui/screens/PreparationCountdownScreen.kt

@@ -0,0 +1,84 @@
+package com.example.workouttimer.ui.screens
+
+import android.content.Context
+import android.os.CountDownTimer
+import android.view.Gravity
+import android.widget.Button
+import android.widget.LinearLayout
+import android.widget.TextView
+import com.example.workouttimer.ui.theme.AppStyle
+
+class PreparationCountdownScreen(
+    context: Context,
+    onSkip: () -> Unit
+) : LinearLayout(context) {
+
+    private var remainingSeconds = 15
+    private var timer: CountDownTimer? = null
+    private val timerText = TextView(context)
+
+    init {
+        AppStyle.applyGradientBackground(this)
+        gravity = Gravity.CENTER_VERTICAL
+
+        val title = TextView(context)
+        title.text = "Get\nReady"
+        AppStyle.headline(title)
+        addView(title)
+
+        val info = TextView(context)
+        info.text = "Dein Workout startet gleich."
+        AppStyle.muted(info)
+        AppStyle.setTextMargin(info)
+        addView(info)
+
+        timerText.gravity = Gravity.START
+        AppStyle.timer(timerText)
+        AppStyle.setTextMargin(timerText)
+        addView(timerText)
+
+        val skipButton = Button(context)
+        skipButton.text = "Jetzt starten -->"
+        AppStyle.primaryButton(skipButton)
+        skipButton.setOnClickListener {
+            timer?.cancel()
+            onSkip()
+        }
+        addView(skipButton)
+
+        val extendButton = Button(context)
+        extendButton.text = "+10 Sekunden"
+        AppStyle.secondaryButton(extendButton)
+        extendButton.setOnClickListener {
+            remainingSeconds += 10
+            restartTimer(onSkip)
+        }
+        addView(extendButton)
+
+        restartTimer(onSkip)
+    }
+
+    private fun restartTimer(onFinished: () -> Unit) {
+        timer?.cancel()
+        timerText.text = remainingSeconds.toString()
+
+        timer = object : CountDownTimer(remainingSeconds * 1000L, 1000L) {
+            override fun onTick(millisUntilFinished: Long) {
+                remainingSeconds = (millisUntilFinished / 1000L).toInt()
+                timerText.text = remainingSeconds.toString()
+            }
+
+            override fun onFinish() {
+                timerText.text = "0"
+                onFinished()
+            }
+        }
+
+        timer?.start()
+    }
+
+    override fun onDetachedFromWindow() {
+        super.onDetachedFromWindow()
+        timer?.cancel()
+    }
+}

app/src/main/java/com/example/workouttimer/ui/screens/ReadyToStartScreen.kt

@@ -4,9 +4,11 @@ import android.content.Context
 import android.view.Gravity
 import android.widget.Button
 import android.widget.LinearLayout
+import android.widget.Space
 import android.widget.TextView
 import com.example.workouttimer.domain.ExerciseTarget
 import com.example.workouttimer.domain.Workout
+import com.example.workouttimer.ui.theme.AppStyle
 
 class ReadyToStartScreen(
     context: Context,
@@ -16,36 +18,70 @@ class ReadyToStartScreen(
 ) : LinearLayout(context) {
 
     init {
-        orientation = VERTICAL
-        gravity = Gravity.CENTER_HORIZONTAL
-        setPadding(48, 48, 48, 48)
+        AppStyle.applyGradientBackground(this)
+
+        layoutParams = LayoutParams(
+            LayoutParams.MATCH_PARENT,
+            LayoutParams.MATCH_PARENT
+        )
+
+        gravity = Gravity.TOP
 
         val title = TextView(context)
-        title.text = workout?.name ?: "Kein Workout ausgewählt"
-        title.textSize = 28f
-        title.gravity = Gravity.CENTER
+        title.text = "Ready\nto Start"
+        AppStyle.headline(title)
 
-        addView(title)
+        val workoutName = TextView(context)
+        workoutName.text = workout?.name ?: "Kein Workout ausgewählt"
+        AppStyle.title(workoutName)
+        AppStyle.setTextMargin(workoutName)
 
-        workout?.exercises?.forEach { exercise ->
-            val exerciseText = TextView(context)
-            exerciseText.text = "${exercise.name} - ${formatTarget(exercise.target)}"
-            exerciseText.textSize = 18f
-            addView(exerciseText)
+        val exerciseList = LinearLayout(context)
+        exerciseList.orientation = VERTICAL
+
+        workout?.exercises?.forEachIndexed { index, exercise ->
+
+            val card = LinearLayout(context)
+            AppStyle.card(card)
+
+            val exerciseTitle = TextView(context)
+            exerciseTitle.text = "${index + 1}. ${exercise.name}"
+            AppStyle.title(exerciseTitle)
+
+            val target = TextView(context)
+            target.text = formatTarget(exercise.target)
+            AppStyle.body(target)
+
+            card.addView(exerciseTitle)
+            card.addView(target)
+
+            exerciseList.addView(card)
         }
 
+        val spacer = Space(context)
+        spacer.layoutParams = LayoutParams(
+            LayoutParams.MATCH_PARENT,
+            AppStyle.dp(this, 32)
+        )
+
         val startButton = Button(context)
-        startButton.text = "Workout starten"
+        startButton.text = "Workout starten -->"
+        AppStyle.primaryButton(startButton)
         startButton.setOnClickListener {
             onStart()
         }
 
         val backButton = Button(context)
         backButton.text = "Zurück"
+        AppStyle.secondaryButton(backButton)
         backButton.setOnClickListener {
             onBack()
         }
 
+        addView(title)
+        addView(workoutName)
+        addView(exerciseList)
+        addView(spacer)
         addView(startButton)
         addView(backButton)
     }

app/src/main/java/com/example/workouttimer/ui/screens/RunningWorkoutScreen.kt

@@ -5,110 +5,146 @@ import android.os.CountDownTimer
 import android.view.Gravity
 import android.widget.Button
 import android.widget.LinearLayout
+import android.widget.Space
 import android.widget.TextView
 import com.example.workouttimer.domain.Exercise
 import com.example.workouttimer.domain.ExerciseTarget
 import com.example.workouttimer.domain.Workout
+import com.example.workouttimer.ui.theme.AppStyle
 
 class RunningWorkoutScreen(
     context: Context,
     workout: Workout?,
     exercise: Exercise?,
+    nextExercise: Exercise?,
     exerciseNumber: Int,
     onNextExercise: () -> Unit,
     onPause: () -> Unit
 ) : LinearLayout(context) {
 
-    private var countDownTimer: CountDownTimer? = null
+    private var timer: CountDownTimer? = null
+    private val mainValueText = TextView(context)
 
     init {
-        orientation = VERTICAL
-        gravity = Gravity.CENTER
-        setPadding(48, 48, 48, 48)
+        AppStyle.applyGradientBackground(this)
+        gravity = Gravity.CENTER_VERTICAL
 
-        val workoutTitle = TextView(context)
-        workoutTitle.text = workout?.name ?: "Workout läuft"
-        workoutTitle.textSize = 22f
-        workoutTitle.gravity = Gravity.CENTER
+        val workoutLabel = TextView(context)
+        workoutLabel.text = workout?.name ?: "Workout läuft"
+        workoutLabel.gravity = Gravity.CENTER
+        AppStyle.muted(workoutLabel)
+
+        val topSpace = Space(context)
+        topSpace.layoutParams = LayoutParams(
+            LayoutParams.MATCH_PARENT,
+            AppStyle.dp(this, 28)
+        )
 
         val exerciseTitle = TextView(context)
-        exerciseTitle.text = "Übung $exerciseNumber: ${exercise?.name ?: "-"}"
-        exerciseTitle.textSize = 30f
+        exerciseTitle.text = "${exerciseNumber}. ${exercise?.name ?: "-"}"
         exerciseTitle.gravity = Gravity.CENTER
+        AppStyle.headline(exerciseTitle)
 
-        val targetText = TextView(context)
-        targetText.text = exercise?.target?.let { formatTarget(it) } ?: ""
-        targetText.textSize = 24f
-        targetText.gravity = Gravity.CENTER
+        val middleSpace = Space(context)
+        middleSpace.layoutParams = LayoutParams(
+            LayoutParams.MATCH_PARENT,
+            AppStyle.dp(this, 26)
+        )
 
-        val timerText = TextView(context)
-        timerText.textSize = 36f
-        timerText.gravity = Gravity.CENTER
+        mainValueText.gravity = Gravity.CENTER
+        AppStyle.timer(mainValueText)
 
-        val infoText = TextView(context)
-        infoText.text = exercise?.info ?: ""
-        infoText.textSize = 16f
-        infoText.gravity = Gravity.CENTER
+        val unitText = TextView(context)
+        unitText.gravity = Gravity.CENTER
+        AppStyle.title(unitText)
+
+        when (val target = exercise?.target) {
+            is ExerciseTarget.Repetitions -> {
+                mainValueText.text = target.reps.toString()
+                unitText.text = "Wiederholungen"
+            }
+
+            is ExerciseTarget.Duration -> {
+                mainValueText.text = target.seconds.toString()
+                unitText.text = "Sekunden"
+                startTimer(target.seconds, onNextExercise)
+            }
+
+            null -> {
+                mainValueText.text = "-"
+                unitText.text = ""
+            }
+        }
+
+        val nextText = TextView(context)
+        nextText.gravity = Gravity.CENTER
+        nextText.text = if (nextExercise != null) {
+            "Next: ${nextExercise.name} / ${formatTarget(nextExercise.target)}"
+        } else {
+            "Next: Workout done"
+        }
+        AppStyle.body(nextText)
+        AppStyle.setTextMargin(nextText)
+
+        val buttonSpace = Space(context)
+        buttonSpace.layoutParams = LayoutParams(
+            LayoutParams.MATCH_PARENT,
+            AppStyle.dp(this, 34)
+        )
 
         val nextButton = Button(context)
-        nextButton.text = "Übung geschafft / Weiter"
+        nextButton.text = if (exercise?.target is ExerciseTarget.Duration) {
+            "Übung überspringen -->"
+        } else {
+            "Übung geschafft -->"
+        }
+        AppStyle.primaryButton(nextButton)
         nextButton.setOnClickListener {
-            countDownTimer?.cancel()
+            timer?.cancel()
             onNextExercise()
         }
 
         val pauseButton = Button(context)
         pauseButton.text = "Pause"
+        AppStyle.secondaryButton(pauseButton)
         pauseButton.setOnClickListener {
-            countDownTimer?.cancel()
+            timer?.cancel()
             onPause()
         }
 
-        addView(workoutTitle)
+        addView(workoutLabel)
+        addView(topSpace)
         addView(exerciseTitle)
-        addView(targetText)
-        addView(timerText)
-        addView(infoText)
+        addView(middleSpace)
+        addView(mainValueText)
+        addView(unitText)
+        addView(nextText)
+        addView(buttonSpace)
         addView(nextButton)
         addView(pauseButton)
-
-        if (exercise?.target is ExerciseTarget.Duration) {
-            nextButton.text = "Überspringen"
-            startCountdown(
-                seconds = exercise.target.seconds,
-                timerText = timerText,
-                onFinished = onNextExercise
-            )
-        } else {
-            timerText.text = ""
-        }
     }
 
-    private fun startCountdown(
-        seconds: Int,
-        timerText: TextView,
-        onFinished: () -> Unit
-    ) {
-        timerText.text = "$seconds"
+    private fun startTimer(seconds: Int, onFinished: () -> Unit) {
+        mainValueText.text = seconds.toString()
 
-        countDownTimer = object : CountDownTimer(seconds * 1000L, 1000L) {
+        timer = object : CountDownTimer(seconds * 1000L, 1000L) {
             override fun onTick(millisUntilFinished: Long) {
-                val remainingSeconds = (millisUntilFinished / 1000L).toInt()
-                timerText.text = remainingSeconds.toString()
+                val remaining = (millisUntilFinished / 1000L).toInt()
+                mainValueText.text = remaining.toString()
             }
 
             override fun onFinish() {
-                timerText.text = "0"
+                mainValueText.text = "0"
                 onFinished()
             }
         }
 
-        countDownTimer?.start()
+        timer?.start()
     }
 
     override fun onDetachedFromWindow() {
         super.onDetachedFromWindow()
-        countDownTimer?.cancel()
+        timer?.cancel()
     }
 
     private fun formatTarget(target: ExerciseTarget): String {

app/src/main/java/com/example/workouttimer/ui/screens/SavedWorkoutsScreen.kt

@@ -4,8 +4,10 @@ import android.content.Context
 import android.view.Gravity
 import android.widget.Button
 import android.widget.LinearLayout
+import android.widget.ScrollView
 import android.widget.TextView
 import com.example.workouttimer.domain.Workout
+import com.example.workouttimer.ui.theme.AppStyle
 
 class SavedWorkoutsScreen(
     context: Context,
@@ -15,64 +17,72 @@ class SavedWorkoutsScreen(
     onEditWorkout: (Workout) -> Unit,
     onDeleteWorkout: (Workout) -> Unit,
     onBack: () -> Unit
-) : LinearLayout(context) {
+) : ScrollView(context) {
 
     init {
-        orientation = VERTICAL
-        gravity = Gravity.CENTER_HORIZONTAL
-        setPadding(48, 48, 48, 48)
+        background = AppStyle.gradientDrawable()
+
+        val content = LinearLayout(context)
+        AppStyle.applyGradientBackground(content)
+
+        content.layoutParams = LayoutParams(
+            LayoutParams.MATCH_PARENT,
+            LayoutParams.WRAP_CONTENT
+        )
+
+        addView(content)
 
         val title = TextView(context)
-        title.text = "Gespeicherte Workouts"
-        title.textSize = 28f
-        title.gravity = Gravity.CENTER
-
-        addView(title)
+        title.text = "Saved\nWorkouts"
+        AppStyle.headline(title)
+        content.addView(title)
 
         val createButton = Button(context)
-        createButton.text = "Neues Workout erstellen"
-        createButton.setOnClickListener {
-            onCreateWorkout()
-        }
-        addView(createButton)
+        createButton.text = "Neues Workout erstellen -->"
+        AppStyle.primaryButton(createButton)
+        createButton.setOnClickListener { onCreateWorkout() }
+        content.addView(createButton)
 
         workouts.forEach { workout ->
+            val card = LinearLayout(context)
+            AppStyle.card(card)
 
-            val workoutRow = LinearLayout(context)
-            workoutRow.orientation = HORIZONTAL
-            workoutRow.gravity = Gravity.CENTER
+            val name = TextView(context)
+            name.text = workout.name
+            AppStyle.title(name)
 
-            val workoutButton = Button(context)
-            workoutButton.text = workout.name
-            workoutButton.setOnClickListener {
-                onWorkoutSelected(workout)
-            }
+            val details = TextView(context)
+            details.text = "${workout.exercises.size} Übungen"
+            AppStyle.muted(details)
+
+            val startButton = Button(context)
+            startButton.text = "Starten -->"
+            AppStyle.primaryButton(startButton)
+            startButton.setOnClickListener { onWorkoutSelected(workout) }
 
             val editButton = Button(context)
             editButton.text = "Bearbeiten"
-            editButton.setOnClickListener {
-                onEditWorkout(workout)
-            }
+            AppStyle.secondaryButton(editButton)
+            editButton.setOnClickListener { onEditWorkout(workout) }
 
             val deleteButton = Button(context)
-            deleteButton.text = "Löschen"
-            deleteButton.setOnClickListener {
-                onDeleteWorkout(workout)
-            }
+            deleteButton.text = "Workout löschen"
+            AppStyle.secondaryButton(deleteButton)
+            deleteButton.setOnClickListener { onDeleteWorkout(workout) }
 
-            workoutRow.addView(workoutButton)
-            workoutRow.addView(editButton)
-            workoutRow.addView(deleteButton)
+            card.addView(name)
+            card.addView(details)
+            card.addView(startButton)
+            card.addView(editButton)
+            card.addView(deleteButton)
 
-            addView(workoutRow)
+            content.addView(card)
         }
 
         val backButton = Button(context)
         backButton.text = "Zurück"
-        backButton.setOnClickListener {
-            onBack()
-        }
-
-        addView(backButton)
+        AppStyle.secondaryButton(backButton)
+        backButton.setOnClickListener { onBack() }
+        content.addView(backButton)
     }
 }

app/src/main/java/com/example/workouttimer/ui/screens/WorkoutEditorScreen.kt

@@ -12,56 +12,64 @@ import android.widget.TextView
 import com.example.workouttimer.domain.Exercise
 import com.example.workouttimer.domain.ExerciseTarget
 import com.example.workouttimer.domain.Workout
+import com.example.workouttimer.ui.theme.AppStyle
 
 class WorkoutEditorScreen(
     context: Context,
     workoutToEdit: Workout?,
-    onSave: (
-        name: String,
-        exercises: List<Exercise>
-    ) -> Unit,
+    onSave: (name: String, exercises: List<Exercise>) -> Unit,
     onCancel: () -> Unit
 ) : ScrollView(context) {
 
     private val exercises = mutableListOf<Exercise>()
     private val exerciseListContainer = LinearLayout(context)
+    private var editingIndex: Int? = null
 
     init {
-        exerciseListContainer.orientation = LinearLayout.VERTICAL
-    }
+        background = AppStyle.gradientDrawable()
 
-    init {
         val content = LinearLayout(context)
-        content.orientation = LinearLayout.VERTICAL
-        content.gravity = Gravity.CENTER_HORIZONTAL
-        content.setPadding(48, 48, 48, 48)
-
+        AppStyle.applyGradientBackground(content)
+        content.layoutParams = LayoutParams(
+            LayoutParams.MATCH_PARENT,
+            LayoutParams.WRAP_CONTENT
+        )
         addView(content)
 
-        workoutToEdit?.exercises?.let {
-            exercises.addAll(it)
-        }
+        workoutToEdit?.exercises?.let { exercises.addAll(it) }
 
         val title = TextView(context)
-        title.text = if (workoutToEdit == null) "Workout erstellen" else "Workout bearbeiten"
-        title.textSize = 28f
-        title.gravity = Gravity.CENTER
+        title.text = if (workoutToEdit == null) "Create\nWorkout" else "Edit\nWorkout"
+        AppStyle.headline(title)
+        content.addView(title)
 
         val workoutNameInput = EditText(context)
         workoutNameInput.hint = "Workout Name"
         workoutNameInput.setText(workoutToEdit?.name ?: "")
+        AppStyle.input(workoutNameInput)
+        content.addView(workoutNameInput)
+
+        val sectionTitle = TextView(context)
+        sectionTitle.text = "Neue Übung"
+        AppStyle.sectionTitle(sectionTitle)
+        content.addView(sectionTitle)
 
         val exerciseNameInput = EditText(context)
         exerciseNameInput.hint = "Übungsname"
+        AppStyle.input(exerciseNameInput)
+        content.addView(exerciseNameInput)
 
         val targetGroup = RadioGroup(context)
         targetGroup.orientation = RadioGroup.HORIZONTAL
+        targetGroup.gravity = Gravity.CENTER
 
         val repsButton = RadioButton(context)
         repsButton.text = "Wiederholungen"
+        AppStyle.body(repsButton)
 
         val timeButton = RadioButton(context)
         timeButton.text = "Zeit"
+        AppStyle.body(timeButton)
 
         val repsButtonId = generateViewId()
         val timeButtonId = generateViewId()
@@ -73,15 +81,63 @@ class WorkoutEditorScreen(
         targetGroup.addView(timeButton)
         targetGroup.check(repsButtonId)
 
+        AppStyle.setTextMargin(targetGroup)
+        content.addView(targetGroup)
+
         val targetValueInput = EditText(context)
         targetValueInput.hint = "Wert, z.B. 12 oder 30"
         targetValueInput.inputType = android.text.InputType.TYPE_CLASS_NUMBER
+        AppStyle.input(targetValueInput)
+        content.addView(targetValueInput)
 
         val infoInput = EditText(context)
         infoInput.hint = "Info / Anmerkung"
+        AppStyle.input(infoInput)
+        content.addView(infoInput)
 
         val addExerciseButton = Button(context)
-        addExerciseButton.text = "Übung hinzufügen"
+        addExerciseButton.text = "Übung hinzufügen -->"
+        AppStyle.primaryButton(addExerciseButton)
+        content.addView(addExerciseButton)
+
+        val listTitle = TextView(context)
+        listTitle.text = "Workout Plan"
+        AppStyle.sectionTitle(listTitle)
+        content.addView(listTitle)
+
+        exerciseListContainer.orientation = LinearLayout.VERTICAL
+        content.addView(exerciseListContainer)
+
+        fun clearExerciseInputs() {
+            exerciseNameInput.text.clear()
+            targetValueInput.text.clear()
+            infoInput.text.clear()
+            targetGroup.check(repsButtonId)
+            editingIndex = null
+            addExerciseButton.text = "Übung hinzufügen -->"
+        }
+
+        fun fillExerciseInputs(index: Int) {
+            val exercise = exercises[index]
+
+            exerciseNameInput.setText(exercise.name)
+            infoInput.setText(exercise.info)
+
+            when (val target = exercise.target) {
+                is ExerciseTarget.Repetitions -> {
+                    targetGroup.check(repsButtonId)
+                    targetValueInput.setText(target.reps.toString())
+                }
+
+                is ExerciseTarget.Duration -> {
+                    targetGroup.check(timeButtonId)
+                    targetValueInput.setText(target.seconds.toString())
+                }
+            }
+
+            editingIndex = index
+            addExerciseButton.text = "Änderung übernehmen -->"
+        }
 
         addExerciseButton.setOnClickListener {
             val exerciseName = exerciseNameInput.text.toString()
@@ -98,26 +154,34 @@ class WorkoutEditorScreen(
                 ExerciseTarget.Duration(targetValueText.toInt())
             }
 
-            val exercise = Exercise(
-                id = exercises.size + 1,
-                name = exerciseName,
-                target = target,
-                info = info
-            )
+            val indexToEdit = editingIndex
 
-            exercises.add(exercise)
+            if (indexToEdit == null) {
+                exercises.add(
+                    Exercise(
+                        id = exercises.size + 1,
+                        name = exerciseName,
+                        target = target,
+                        info = info
+                    )
+                )
+            } else {
+                exercises[indexToEdit] = Exercise(
+                    id = indexToEdit + 1,
+                    name = exerciseName,
+                    target = target,
+                    info = info
+                )
+            }
 
-            exerciseNameInput.text.clear()
-            targetValueInput.text.clear()
-            infoInput.text.clear()
-            targetGroup.check(repsButtonId)
-
-            updateExerciseList()
+            updateExerciseIds()
+            clearExerciseInputs()
+            updateExerciseList(::fillExerciseInputs)
         }
 
         val saveButton = Button(context)
-        saveButton.text = "Workout speichern"
-
+        saveButton.text = "Workout speichern -->"
+        AppStyle.primaryButton(saveButton)
         saveButton.setOnClickListener {
             val workoutName = workoutNameInput.text.toString()
 
@@ -130,70 +194,99 @@ class WorkoutEditorScreen(
 
         val cancelButton = Button(context)
         cancelButton.text = "Abbrechen"
+        AppStyle.secondaryButton(cancelButton)
         cancelButton.setOnClickListener {
             onCancel()
         }
 
-        content.addView(title)
-        content.addView(workoutNameInput)
-
-        val exerciseSectionTitle = TextView(context)
-        exerciseSectionTitle.text = "Übung hinzufügen"
-        exerciseSectionTitle.textSize = 22f
-
-        content.addView(exerciseSectionTitle)
-        content.addView(exerciseNameInput)
-        content.addView(targetGroup)
-        content.addView(targetValueInput)
-        content.addView(infoInput)
-        content.addView(addExerciseButton)
-
-        val listTitle = TextView(context)
-        listTitle.text = "Übungen im Workout"
-        listTitle.textSize = 22f
-
-        content.addView(listTitle)
-        exerciseListContainer.orientation = LinearLayout.VERTICAL
-        content.addView(exerciseListContainer)
-
         content.addView(saveButton)
         content.addView(cancelButton)
 
-        updateExerciseList()
+        updateExerciseList(::fillExerciseInputs)
     }
 
-    private fun updateExerciseList() {
+    private fun updateExerciseList(onEditExercise: (Int) -> Unit) {
         exerciseListContainer.removeAllViews()
 
         if (exercises.isEmpty()) {
             val emptyText = TextView(context)
             emptyText.text = "Noch keine Übungen hinzugefügt."
+            AppStyle.muted(emptyText)
+            AppStyle.setTextMargin(emptyText)
             exerciseListContainer.addView(emptyText)
             return
         }
 
         exercises.forEachIndexed { index, exercise ->
+            val card = LinearLayout(context)
+            AppStyle.card(card)
 
-            val row = LinearLayout(context)
-            row.orientation = LinearLayout.HORIZONTAL
-            row.gravity = Gravity.CENTER_VERTICAL
+            val exerciseTitle = TextView(context)
+            exerciseTitle.text = "${index + 1}. ${exercise.name}"
+            AppStyle.title(exerciseTitle)
 
-            val exerciseText = TextView(context)
-            exerciseText.text = "${index + 1}. ${exercise.name} - ${formatTarget(exercise.target)}"
-            exerciseText.textSize = 16f
+            val targetText = TextView(context)
+            targetText.text = formatTarget(exercise.target)
+            AppStyle.body(targetText)
+
+            val infoText = TextView(context)
+            infoText.text = exercise.info
+            AppStyle.muted(infoText)
+
+            val editButton = Button(context)
+            editButton.text = "Bearbeiten"
+            AppStyle.primaryButton(editButton)
+            editButton.setOnClickListener {
+                onEditExercise(index)
+            }
+
+            val upButton = Button(context)
+            upButton.text = "Nach oben"
+            AppStyle.secondaryButton(upButton)
+            upButton.isEnabled = index > 0
+            upButton.setOnClickListener {
+                val temp = exercises[index - 1]
+                exercises[index - 1] = exercises[index]
+                exercises[index] = temp
+                updateExerciseIds()
+                updateExerciseList(onEditExercise)
+            }
+
+            val downButton = Button(context)
+            downButton.text = "Nach unten"
+            AppStyle.secondaryButton(downButton)
+            downButton.isEnabled = index < exercises.lastIndex
+            downButton.setOnClickListener {
+                val temp = exercises[index + 1]
+                exercises[index + 1] = exercises[index]
+                exercises[index] = temp
+                updateExerciseIds()
+                updateExerciseList(onEditExercise)
+            }
 
             val deleteButton = Button(context)
             deleteButton.text = "Löschen"
+            AppStyle.secondaryButton(deleteButton)
             deleteButton.setOnClickListener {
                 exercises.removeAt(index)
+                editingIndex = null
                 updateExerciseIds()
-                updateExerciseList()
+                updateExerciseList(onEditExercise)
             }
 
-            row.addView(exerciseText)
-            row.addView(deleteButton)
+            card.addView(exerciseTitle)
+            card.addView(targetText)
 
-            exerciseListContainer.addView(row)
+            if (exercise.info.isNotBlank()) {
+                card.addView(infoText)
+            }
+
+            card.addView(editButton)
+            card.addView(upButton)
+            card.addView(downButton)
+            card.addView(deleteButton)
+
+            exerciseListContainer.addView(card)
         }
     }
 

app/src/main/java/com/example/workouttimer/ui/theme/AppStyle.kt

@@ -0,0 +1,266 @@
+package com.example.workouttimer.ui.theme
+
+import android.graphics.Color
+import android.graphics.drawable.GradientDrawable
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import android.widget.EditText
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.core.content.res.ResourcesCompat
+import com.example.workouttimer.R
+
+object AppStyle {
+
+    val yellow = Color.rgb(245, 218, 49)
+    val green = Color.rgb(172, 232, 122)
+    val cyan = Color.rgb(111, 219, 232)
+    val black = Color.rgb(0, 0, 0)
+    val white = Color.rgb(255, 255, 255)
+    val softWhite = Color.rgb(250, 250, 250)
+    val lightBlack = Color.rgb(24, 24, 24)
+    val mutedText = Color.rgb(70, 70, 70)
+
+    const val screenPadding = 48
+    const val smallSpacing = 16
+    const val mediumSpacing = 24
+    const val largeSpacing = 40
+    const val cornerRadius = 4f
+
+    private val regularFontId = R.font.funnel_display_regular
+    private val boldFontId = R.font.funnel_display_bold
+    private val mediumFontId = R.font.funnel_display_medium
+    private val extraBoldFontId = R.font.funnel_display_extra_bold
+
+    fun regular(view: TextView) {
+        view.typeface = ResourcesCompat.getFont(view.context, regularFontId)
+    }
+
+    fun medium(view: TextView) {
+        view.typeface = ResourcesCompat.getFont(view.context, mediumFontId)
+    }
+
+    fun bold(view: TextView) {
+        view.typeface = ResourcesCompat.getFont(view.context, boldFontId)
+    }
+
+    fun extraBold(view: TextView) {
+        view.typeface = ResourcesCompat.getFont(view.context, extraBoldFontId)
+    }
+
+    fun dp(view: View, value: Int): Int {
+        return (value * view.context.resources.displayMetrics.density).toInt()
+    }
+
+    fun applyGradientBackground(layout: LinearLayout) {
+        layout.orientation = LinearLayout.VERTICAL
+        layout.setPadding(
+            dp(layout, 28),
+            dp(layout, 56),
+            dp(layout, 28),
+            dp(layout, 28)
+        )
+
+        val gradient = GradientDrawable(
+            GradientDrawable.Orientation.TOP_BOTTOM,
+            intArrayOf(yellow, green, cyan)
+        )
+
+        layout.background = gradientDrawable()
+    }
+
+    fun headline(textView: TextView) {
+        extraBold(textView)
+        textView.textSize = 48f
+        textView.setTextColor(black)
+    }
+
+    fun title(textView: TextView) {
+        bold(textView)
+        textView.textSize = 30f
+        textView.setTextColor(black)
+    }
+
+    fun sectionTitle(textView: TextView) {
+        bold(textView)
+        textView.textSize = 22f
+        textView.setTextColor(black)
+        setTextMargin(textView)
+    }
+
+    fun body(textView: TextView) {
+        regular(textView)
+        textView.textSize = 17f
+        textView.setTextColor(black)
+    }
+
+    fun muted(textView: TextView) {
+        regular(textView)
+        textView.textSize = 15f
+        textView.setTextColor(mutedText)
+    }
+
+    fun timer(textView: TextView) {
+        extraBold(textView)
+        textView.textSize = 76f
+        textView.setTextColor(black)
+    }
+
+    fun primaryButton(button: Button) {
+        bold(button)
+        button.textSize = 16f
+        button.setTextColor(white)
+        button.background = roundedBackground(black)
+        button.isAllCaps = false
+        setFullWidthMargin(button)
+    }
+
+    fun secondaryButton(button: Button) {
+        bold(button)
+        button.textSize = 16f
+        button.setTextColor(black)
+        button.background = roundedBackground(white)
+        button.isAllCaps = false
+        setFullWidthMargin(button)
+    }
+
+    fun dangerButton(button: Button) {
+        bold(button)
+        button.textSize = 16f
+        button.setTextColor(white)
+        button.background = roundedBackground(Color.rgb(210, 55, 55))
+        button.isAllCaps = false
+        setFullWidthMargin(button)
+    }
+
+    fun compactButton(button: Button) {
+        medium(button)
+        button.textSize = 14f
+        button.setTextColor(black)
+        button.background = roundedBackground(white)
+        button.isAllCaps = false
+    }
+
+    fun input(editText: EditText) {
+        regular(editText)
+        editText.textSize = 16f
+        editText.setTextColor(black)
+        editText.setHintTextColor(mutedText)
+        editText.background = roundedStrokeBackground(white)
+        editText.setPadding(28, 12, 28, 12)
+        setFullWidthMargin(editText)
+    }
+
+    fun card(layout: LinearLayout) {
+        layout.orientation = LinearLayout.VERTICAL
+        layout.background = roundedBackground(softWhite)
+        layout.setPadding(28, 24, 28, 24)
+
+        val params = LinearLayout.LayoutParams(
+            ViewGroup.LayoutParams.MATCH_PARENT,
+            ViewGroup.LayoutParams.WRAP_CONTENT
+        )
+        params.setMargins(0, mediumSpacing, 0, 0)
+        layout.layoutParams = params
+    }
+
+    fun row(layout: LinearLayout) {
+        layout.orientation = LinearLayout.HORIZONTAL
+    }
+
+    fun setFullWidthMargin(view: View) {
+        val params = LinearLayout.LayoutParams(
+            ViewGroup.LayoutParams.MATCH_PARENT,
+            dp(view, 58)
+        )
+        params.setMargins(0, dp(view, 14), 0, 0)
+        view.layoutParams = params
+    }
+
+    fun setTextMargin(view: View) {
+        val params = LinearLayout.LayoutParams(
+            ViewGroup.LayoutParams.MATCH_PARENT,
+            ViewGroup.LayoutParams.WRAP_CONTENT
+        )
+        params.setMargins(0, mediumSpacing, 0, 0)
+        view.layoutParams = params
+    }
+
+    fun roundedBackground(color: Int): GradientDrawable {
+        return GradientDrawable().apply {
+            setColor(color)
+            cornerRadius = AppStyle.cornerRadius
+        }
+    }
+
+    fun roundedStrokeBackground(color: Int): GradientDrawable {
+        return GradientDrawable().apply {
+            setColor(color)
+            cornerRadius = AppStyle.cornerRadius
+            setStroke(2, black)
+        }
+    }
+
+    fun squareBackground(color: Int): GradientDrawable {
+        return GradientDrawable().apply {
+            setColor(color)
+            cornerRadius = 0f
+        }
+    }
+
+    fun actionCard(
+        context: android.content.Context,
+        text: String,
+        dark: Boolean,
+        onClick: () -> Unit
+    ): LinearLayout {
+        val card = LinearLayout(context)
+        card.orientation = LinearLayout.HORIZONTAL
+        card.gravity = android.view.Gravity.CENTER_VERTICAL
+        card.setPadding(dp(card, 20), 0, dp(card, 20), 0)
+        card.background = squareBackground(if (dark) black else white)
+        card.setOnClickListener { onClick() }
+
+        val label = TextView(context)
+        label.text = text
+        bold(label)
+        label.textSize = 20f
+        label.setTextColor(if (dark) white else black)
+
+        val arrow = TextView(context)
+        arrow.text = " -->"
+        bold(arrow)
+        arrow.textSize = 30f
+        arrow.setTextColor(if (dark) white else black)
+        arrow.gravity = android.view.Gravity.END
+
+        val labelParams = LinearLayout.LayoutParams(
+            0,
+            ViewGroup.LayoutParams.WRAP_CONTENT,
+            1f
+        )
+        labelParams.setMargins(dp(card, 16), 0, dp(card, 16), 0)
+
+        label.layoutParams = labelParams
+
+        val cardParams = LinearLayout.LayoutParams(
+            ViewGroup.LayoutParams.MATCH_PARENT,
+            dp(card, 62)
+        )
+        cardParams.setMargins(0, dp(card, 14), 0, 0)
+        card.layoutParams = cardParams
+
+        card.addView(label)
+        card.addView(arrow)
+
+        return card
+    }
+
+    fun gradientDrawable(): GradientDrawable {
+        return GradientDrawable(
+            GradientDrawable.Orientation.TOP_BOTTOM,
+            intArrayOf(yellow, green, cyan)
+        )
+    }
+}

app/src/main/java/com/example/workouttimer/viewmodel/WorkoutViewModel.kt

@@ -114,4 +114,15 @@ class WorkoutViewModel(context: Context) {
         val workout = currentWorkout ?: return null
         return workout.exercises[currentExerciseIndex]
     }
+
+    fun getNextExercise(): Exercise? {
+        val workout = currentWorkout ?: return null
+        val nextIndex = currentExerciseIndex + 1
+
+        return if (nextIndex <= workout.exercises.lastIndex) {
+            workout.exercises[nextIndex]
+        } else {
+            null
+        }
+    }
 }