[System.Serializable]
public class AchievementData
{
    public string achievementName;
    public bool isFinished;
    public int value;
}

[System.Serializable]
public class SkillData
{
    public string skillId;
    public int level;
}

[System.Serializable]
public class TechTreeSaveData
{
    public List<SkillData> skills = new();
    public List<int> spentPointsPerTree = new();
}

[System.Serializable]
public class MapData
{
    public int savedVoidShard;
    public int savedCurium;
    public List<AchievementData> achievements = new();
}