diff --git a/app/src/main/java/com/github/nacabaro/vbhelper/battle/ArenaBattleSystem.kt b/app/src/main/java/com/github/nacabaro/vbhelper/battle/ArenaBattleSystem.kt
new file mode 100644
index 0000000..2c3fc37
--- /dev/null
+++ b/app/src/main/java/com/github/nacabaro/vbhelper/battle/ArenaBattleSystem.kt
@@ -0,0 +1,134 @@
+package com.github.nacabaro.vbhelper.battle
+
+import android.util.Log
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.setValue
+
+class ArenaBattleSystem {
+    companion object {
+        private const val TAG = "ArenaBattleSystem"
+    }
+
+    // Attack phases: 0=Idle, 1=Player attack on player screen, 2=Player attack on opponent screen, 
+    // 3=Opponent attack on opponent screen, 4=Opponent attack on player screen
+    private var _attackPhase by mutableStateOf(0)
+    val attackPhase: Int get() = _attackPhase
+
+    private var _attackProgress by mutableStateOf(0f)
+    val attackProgress: Float get() = _attackProgress
+
+    private var _isPlayerAttacking by mutableStateOf(false)
+    val isPlayerAttacking: Boolean get() = _isPlayerAttacking
+
+    private var _attackIsHit by mutableStateOf(false)
+    val attackIsHit: Boolean get() = _attackIsHit
+
+    private var _isAttackButtonEnabled by mutableStateOf(true)
+    val isAttackButtonEnabled: Boolean get() = _isAttackButtonEnabled
+
+    private var _currentView by mutableStateOf(0)
+    val currentView: Int get() = _currentView
+
+    private var _playerHP by mutableStateOf(100f)
+    val playerHP: Float get() = _playerHP
+
+    private var _opponentHP by mutableStateOf(100f)
+    val opponentHP: Float get() = _opponentHP
+
+    private var _isBattleOver by mutableStateOf(false)
+    val isBattleOver: Boolean get() = _isBattleOver
+
+    private var _critBarProgress by mutableStateOf(0)
+    val critBarProgress: Int get() = _critBarProgress
+
+    fun startPlayerAttack() {
+        Log.d(TAG, "Starting player attack")
+        _attackPhase = 1
+        _attackProgress = 0f
+        _isPlayerAttacking = true
+        _isAttackButtonEnabled = false
+        _currentView = 0
+    }
+
+    fun startOpponentAttack() {
+        Log.d(TAG, "Starting opponent attack")
+        _attackPhase = 3
+        _attackProgress = 0f
+        _isPlayerAttacking = false
+        _currentView = 1
+    }
+
+    fun advanceAttackPhase() {
+        _attackPhase++
+        _attackProgress = 0f
+        Log.d(TAG, "Advanced to attack phase: $_attackPhase")
+    }
+
+    fun setAttackProgress(progress: Float) {
+        _attackProgress = progress
+    }
+
+    fun setAttackHitState(isHit: Boolean) {
+        _attackIsHit = isHit
+    }
+
+    fun switchToView(view: Int) {
+        _currentView = view
+        Log.d(TAG, "Switched to view: $view")
+    }
+
+    fun enableAttackButton() {
+        _isAttackButtonEnabled = true
+        Log.d(TAG, "Attack button enabled")
+    }
+
+    fun applyDamage(isPlayer: Boolean, damage: Float) {
+        if (isPlayer) {
+            _playerHP = (_playerHP - damage).coerceAtLeast(0f)
+        } else {
+            _opponentHP = (_opponentHP - damage).coerceAtLeast(0f)
+        }
+        Log.d(TAG, "Applied damage: ${if (isPlayer) "player" else "opponent"} -$damage")
+    }
+
+    fun updateHPFromAPI(playerHP: Float, opponentHP: Float) {
+        _playerHP = playerHP
+        _opponentHP = opponentHP
+        Log.d(TAG, "Updated HP from API: Player=$playerHP, Opponent=$opponentHP")
+    }
+
+    fun completeAttackAnimation(playerDamage: Float = 0f, opponentDamage: Float = 0f) {
+        if (playerDamage > 0f) {
+            applyDamage(true, playerDamage)
+        }
+        if (opponentDamage > 0f) {
+            applyDamage(false, opponentDamage)
+        }
+        Log.d(TAG, "Completed attack animation with damage: Player=$playerDamage, Opponent=$opponentDamage")
+    }
+
+    fun resetAttackState() {
+        _attackPhase = 0
+        _attackProgress = 0f
+        _isPlayerAttacking = false
+        _attackIsHit = false
+        _currentView = 0
+        Log.d(TAG, "Reset attack state")
+    }
+
+    fun checkBattleOver(): Boolean {
+        return _playerHP <= 0f || _opponentHP <= 0f
+    }
+
+    fun endBattle() {
+        _isBattleOver = true
+        Log.d(TAG, "Battle ended")
+    }
+
+    fun updateCritBarProgress(progress: Int) {
+        _critBarProgress = progress
+        Log.d(TAG, "Updated crit bar progress: $progress")
+    }
+} 
\ No newline at end of file