local TweenService = game:GetService("TweenService")
local UserInputService = game:GetService("UserInputService")
local Players = game:GetService("Players")
local CoreGui = game:GetService("CoreGui")

local Theme = {
    MainBg = Color3.fromRGB(12, 12, 12),
    SidebarBg = Color3.fromRGB(16, 16, 16),
    SectionBg = Color3.fromRGB(22, 22, 22),
    ItemBg = Color3.fromRGB(30, 30, 30),
    Accent = Color3.fromRGB(152, 226, 204),
    Text = Color3.fromRGB(245, 245, 245),
    SubText = Color3.fromRGB(140, 140, 140),
    DarkText = Color3.fromRGB(20, 20, 20)
}

local function CreateTween(instance, info, properties)
    local tween = TweenService:Create(instance, TweenInfo.new(unpack(info)), properties)
    tween:Play()
    return tween
end

local function MakeDraggable(topbar, object)
    local dragging, dragInput, dragStart, startPos

    topbar.InputBegan:Connect(function(input)
        if input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch then
            dragging = true
            dragStart = input.Position
            startPos = object.Position
            input.Changed:Connect(function()
                if input.UserInputState == Enum.UserInputState.End then
                    dragging = false
                end
            end)
        end
    end)

    topbar.InputChanged:Connect(function(input)
        if input.UserInputType == Enum.UserInputType.MouseMovement or input.UserInputType == Enum.UserInputType.Touch then
            dragInput = input
        end
    end)

    UserInputService.InputChanged:Connect(function(input)
        if input == dragInput and dragging then
            local delta = input.Position - dragStart
            CreateTween(object, {0.08, Enum.EasingStyle.Sine, Enum.EasingDirection.Out}, {
                Position = UDim2.new(startPos.X.Scale, startPos.X.Offset + delta.X, startPos.Y.Scale, startPos.Y.Offset + delta.Y)
            })
        end
    end)
end

local Library = {}

function Library:Create(config)
    config = config or {}
    local uiConfig = config.UI or {}
    local sysConfig = config.Config or {}

    local screen = Instance.new("ScreenGui")
    screen.Name = "StellarUI"
    screen.ResetOnSpawn = false
    screen.ZIndexBehavior = Enum.ZIndexBehavior.Sibling

    local success = pcall(function() screen.Parent = CoreGui end)
    if not success then screen.Parent = Players.LocalPlayer:WaitForChild("PlayerGui") end

    local mainFrame = Instance.new("Frame", screen)
    mainFrame.Size = UDim2.new(0, 700, 0, 450)
    mainFrame.Position = UDim2.new(0.5, -350, 0.5, -225)
    mainFrame.BackgroundColor3 = Theme.MainBg
    mainFrame.BorderSizePixel = 0
    mainFrame.ClipsDescendants = true
    Instance.new("UICorner", mainFrame).CornerRadius = UDim.new(0, 8)

    local dragArea = Instance.new("Frame", mainFrame)
    dragArea.Size = UDim2.new(1, 0, 0, 40)
    dragArea.BackgroundTransparency = 1
    dragArea.ZIndex = 100
    MakeDraggable(dragArea, mainFrame)

    local closeBtn = Instance.new("TextButton", dragArea)
    closeBtn.Size = UDim2.new(0, 30, 0, 30)
    closeBtn.Position = UDim2.new(1, -35, 0, 5)
    closeBtn.BackgroundTransparency = 1
    closeBtn.Text = "X"
    closeBtn.TextColor3 = Theme.SubText
    closeBtn.Font = Enum.Font.GothamBold
    closeBtn.TextSize = 14
    closeBtn.MouseButton1Click:Connect(function()
        CreateTween(mainFrame, {0.3, Enum.EasingStyle.Back, Enum.EasingDirection.In}, {Size = UDim2.new(0, 0, 0, 0), Position = UDim2.new(0.5, 0, 0.5, 0)})
        task.wait(0.3)
        screen:Destroy()
    end)

    local minBtn = Instance.new("TextButton", dragArea)
    minBtn.Size = UDim2.new(0, 30, 0, 30)
    minBtn.Position = UDim2.new(1, -70, 0, 5)
    minBtn.BackgroundTransparency = 1
    minBtn.Text = "-"
    minBtn.TextColor3 = Theme.SubText
    minBtn.Font = Enum.Font.GothamBold
    minBtn.TextSize = 20
    local minimized = false
    minBtn.MouseButton1Click:Connect(function()
        minimized = not minimized
        CreateTween(mainFrame, {0.4, Enum.EasingStyle.Exponential, Enum.EasingDirection.Out}, {Size = minimized and UDim2.new(0, 700, 0, 40) or UDim2.new(0, 700, 0, 450)})
    end)

    local sidebar = Instance.new("Frame", mainFrame)
    sidebar.Size = UDim2.new(0, 200, 1, 0)
    sidebar.BackgroundColor3 = Theme.SidebarBg
    sidebar.BorderSizePixel = 0

    local header = Instance.new("Frame", sidebar)
    header.Size = UDim2.new(1, 0, 0, 60)
    header.BackgroundTransparency = 1

    local logo = Instance.new("ImageLabel", header)
    logo.Size = UDim2.new(0, 24, 0, 24)
    logo.Position = UDim2.new(0, 15, 0.5, -12)
    logo.BackgroundTransparency = 1
    logo.Image = uiConfig.Icon or "rbxassetid://0"

    local titleLabel = Instance.new("TextLabel", header)
    titleLabel.Size = UDim2.new(1, -55, 0, 20)
    titleLabel.Position = UDim2.new(0, 45, 0, 12)
    titleLabel.BackgroundTransparency = 1
    titleLabel.Text = uiConfig.Title or "Library"
    titleLabel.TextColor3 = Theme.Text
    titleLabel.Font = Enum.Font.GothamBold
    titleLabel.TextSize = 13
    titleLabel.TextXAlignment = Enum.TextXAlignment.Left

    local subTitleLabel = Instance.new("TextLabel", header)
    subTitleLabel.Size = UDim2.new(1, -55, 0, 15)
    subTitleLabel.Position = UDim2.new(0, 45, 0, 32)
    subTitleLabel.BackgroundTransparency = 1
    subTitleLabel.Text = uiConfig.SubTitle or "Version"
    subTitleLabel.TextColor3 = Theme.SubText
    subTitleLabel.Font = Enum.Font.Gotham
    subTitleLabel.TextSize = 11
    subTitleLabel.TextXAlignment = Enum.TextXAlignment.Left

    local tabContainer = Instance.new("ScrollingFrame", sidebar)
    tabContainer.Size = UDim2.new(1, 0, 1, -130)
    tabContainer.Position = UDim2.new(0, 0, 0, 60)
    tabContainer.BackgroundTransparency = 1
    tabContainer.ScrollBarThickness = 0
    local tabLayout = Instance.new("UIListLayout", tabContainer)
    tabLayout.Padding = UDim.new(0, 2)
    tabLayout.HorizontalAlignment = Enum.HorizontalAlignment.Center

    local profileFrame = Instance.new("Frame", sidebar)
    profileFrame.Size = UDim2.new(1, 0, 0, 70)
    profileFrame.Position = UDim2.new(0, 0, 1, -70)
    profileFrame.BackgroundColor3 = Theme.MainBg
    profileFrame.BorderSizePixel = 0

    local avatar = Instance.new("ImageLabel", profileFrame)
    avatar.Size = UDim2.new(0, 36, 0, 36)
    avatar.Position = UDim2.new(0, 15, 0.5, -18)
    avatar.BackgroundColor3 = Theme.ItemBg
    Instance.new("UICorner", avatar).CornerRadius = UDim.new(1, 0)
    pcall(function()
        avatar.Image = Players:GetUserThumbnailAsync(Players.LocalPlayer.UserId, Enum.ThumbnailType.HeadShot, Enum.ThumbnailSize.Size48x48)
    end)

    local pName = Instance.new("TextLabel", profileFrame)
    pName.Size = UDim2.new(1, -65, 0, 20)
    pName.Position = UDim2.new(0, 60, 0, 15)
    pName.BackgroundTransparency = 1
    pName.Text = Players.LocalPlayer and Players.LocalPlayer.Name or "User"
    pName.TextColor3 = Theme.Text
    pName.Font = Enum.Font.GothamMedium
    pName.TextSize = 13
    pName.TextXAlignment = Enum.TextXAlignment.Left

    local pExp = Instance.new("TextLabel", profileFrame)
    pExp.Size = UDim2.new(1, -65, 0, 15)
    pExp.Position = UDim2.new(0, 60, 0, 35)
    pExp.BackgroundTransparency = 1
    pExp.Text = "Expires:  <font color='#98E2CC'>Never</font>"
    pExp.RichText = true
    pExp.TextColor3 = Theme.SubText
    pExp.Font = Enum.Font.Gotham
    pExp.TextSize = 11
    pExp.TextXAlignment = Enum.TextXAlignment.Left

    local contentContainer = Instance.new("Frame", mainFrame)
    contentContainer.Size = UDim2.new(1, -200, 1, 0)
    contentContainer.Position = UDim2.new(0, 200, 0, 0)
    contentContainer.BackgroundTransparency = 1

    local window = {Tabs = {}, ActiveTab = nil}

    local function BuildElements(obj, container)
        function obj:Button(name, callback)
            local btn = Instance.new("TextButton", container)
            btn.Size = UDim2.new(1, 0, 0, 35)
            btn.BackgroundColor3 = Theme.ItemBg
            btn.Text = name
            btn.TextColor3 = Theme.Text
            btn.Font = Enum.Font.GothamMedium
            btn.TextSize = 13
            Instance.new("UICorner", btn).CornerRadius = UDim.new(0, 6)

            btn.MouseEnter:Connect(function() CreateTween(btn, {0.2, Enum.EasingStyle.Quad}, {BackgroundColor3 = Color3.fromRGB(40, 40, 40)}) end)
            btn.MouseLeave:Connect(function() CreateTween(btn, {0.2, Enum.EasingStyle.Quad}, {BackgroundColor3 = Theme.ItemBg}) end)
            btn.MouseButton1Click:Connect(function() pcall(callback) end)
        end

        function obj:Toggle(name, default, callback)
            local togFrame = Instance.new("Frame", container)
            togFrame.Size = UDim2.new(1, 0, 0, 35)
            togFrame.BackgroundTransparency = 1

            local label = Instance.new("TextLabel", togFrame)
            label.Size = UDim2.new(1, -60, 1, 0)
            label.BackgroundTransparency = 1
            label.Text = name
            label.TextColor3 = Theme.Text
            label.Font = Enum.Font.GothamMedium
            label.TextSize = 13
            label.TextXAlignment = Enum.TextXAlignment.Left

            local btn = Instance.new("TextButton", togFrame)
            btn.Size = UDim2.new(1, 0, 1, 0)
            btn.BackgroundTransparency = 1
            btn.Text = ""

            local track = Instance.new("Frame", togFrame)
            track.Size = UDim2.new(0, 36, 0, 20)
            track.Position = UDim2.new(1, -36, 0.5, -10)
            track.BackgroundColor3 = Theme.ItemBg
            Instance.new("UICorner", track).CornerRadius = UDim.new(1, 0)

            local circle = Instance.new("Frame", track)
            circle.Size = UDim2.new(0, 14, 0, 14)
            circle.Position = UDim2.new(0, 3, 0.5, -7)
            circle.BackgroundColor3 = Theme.SubText
            Instance.new("UICorner", circle).CornerRadius = UDim.new(1, 0)

            local state = default
            local function fire(cb)
                if state then
                    CreateTween(track, {0.2, Enum.EasingStyle.Quad}, {BackgroundColor3 = Theme.ItemBg})
                    CreateTween(circle, {0.2, Enum.EasingStyle.Quad}, {Position = UDim2.new(1, -17, 0.5, -7), BackgroundColor3 = Theme.Accent})
                else
                    CreateTween(track, {0.2, Enum.EasingStyle.Quad}, {BackgroundColor3 = Theme.ItemBg})
                    CreateTween(circle, {0.2, Enum.EasingStyle.Quad}, {Position = UDim2.new(0, 3, 0.5, -7), BackgroundColor3 = Theme.SubText})
                end
                if cb then pcall(callback, state) end
            end

            btn.MouseButton1Click:Connect(function()
                state = not state
                fire(true)
            end)
            fire(false)
        end

        function obj:Slider(name, min, max, callback)
            local sliderFrame = Instance.new("Frame", container)
            sliderFrame.Size = UDim2.new(1, 0, 0, 45)
            sliderFrame.BackgroundTransparency = 1

            local label = Instance.new("TextLabel", sliderFrame)
            label.Size = UDim2.new(1, -50, 0, 20)
            label.BackgroundTransparency = 1
            label.Text = name
            label.TextColor3 = Theme.Text
            label.Font = Enum.Font.GothamMedium
            label.TextSize = 13
            label.TextXAlignment = Enum.TextXAlignment.Left

            local valLabel = Instance.new("TextLabel", sliderFrame)
            valLabel.Size = UDim2.new(0, 40, 0, 20)
            valLabel.Position = UDim2.new(1, -40, 0, 0)
            valLabel.BackgroundTransparency = 1
            valLabel.Text = tostring(min)
            valLabel.TextColor3 = Theme.SubText
            valLabel.Font = Enum.Font.Gotham
            valLabel.TextSize = 12
            valLabel.TextXAlignment = Enum.TextXAlignment.Right

            local trackBox = Instance.new("TextButton", sliderFrame)
            trackBox.Size = UDim2.new(1, -40, 0, 20)
            trackBox.Position = UDim2.new(0, 0, 0, 20)
            trackBox.BackgroundTransparency = 1
            trackBox.Text = ""

            local track = Instance.new("Frame", trackBox)
            track.Size = UDim2.new(1, 0, 0, 6)
            track.Position = UDim2.new(0, 0, 0.5, -3)
            track.BackgroundColor3 = Theme.ItemBg
            Instance.new("UICorner", track).CornerRadius = UDim.new(1, 0)

            local fill = Instance.new("Frame", track)
            fill.Size = UDim2.new(0, 0, 1, 0)
            fill.BackgroundColor3 = Theme.Accent
            Instance.new("UICorner", fill).CornerRadius = UDim.new(1, 0)

            local grabber = Instance.new("Frame", fill)
            grabber.Size = UDim2.new(0, 12, 0, 12)
            grabber.Position = UDim2.new(1, -6, 0.5, -6)
            grabber.BackgroundColor3 = Color3.fromRGB(255, 255, 255)
            Instance.new("UICorner", grabber).CornerRadius = UDim.new(1, 0)

            local dragging = false
            local function update(input)
                local pct = math.clamp((input.Position.X - track.AbsolutePosition.X) / track.AbsoluteSize.X, 0, 1)
                local val = math.floor(min + ((max - min) * pct))
                CreateTween(fill, {0.1, Enum.EasingStyle.Sine}, {Size = UDim2.new(pct, 0, 1, 0)})
                valLabel.Text = tostring(val)
                pcall(callback, val)
            end

            trackBox.InputBegan:Connect(function(input)
                if input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch then
                    dragging = true
                    update(input)
                end
            end)
            UserInputService.InputEnded:Connect(function(input)
                if input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch then dragging = false end
            end)
            UserInputService.InputChanged:Connect(function(input)
                if dragging and (input.UserInputType == Enum.UserInputType.MouseMovement or input.UserInputType == Enum.UserInputType.Touch) then update(input) end
            end)
        end

        function obj:Dropdown(name, list, callback)
            local dropFrame = Instance.new("Frame", container)
            dropFrame.Size = UDim2.new(1, 0, 0, 35)
            dropFrame.BackgroundColor3 = Theme.ItemBg
            dropFrame.ClipsDescendants = true
            Instance.new("UICorner", dropFrame).CornerRadius = UDim.new(0, 6)

            local btn = Instance.new("TextButton", dropFrame)
            btn.Size = UDim2.new(1, 0, 0, 35)
            btn.BackgroundTransparency = 1
            btn.Text = "  " .. name
            btn.TextColor3 = Theme.Text
            btn.Font = Enum.Font.GothamMedium
            btn.TextSize = 13
            btn.TextXAlignment = Enum.TextXAlignment.Left

            local icon = Instance.new("TextLabel", btn)
            icon.Size = UDim2.new(0, 20, 1, 0)
            icon.Position = UDim2.new(1, -25, 0, 0)
            icon.BackgroundTransparency = 1
            icon.Text = "v"
            icon.TextColor3 = Theme.SubText
            icon.Font = Enum.Font.GothamBold

            local layout = Instance.new("UIListLayout", dropFrame)
            layout.Padding = UDim.new(0, 2)
            layout.HorizontalAlignment = Enum.HorizontalAlignment.Center

            local expanded = false
            btn.MouseButton1Click:Connect(function()
                expanded = not expanded
                CreateTween(dropFrame, {0.3, Enum.EasingStyle.Exponential}, {Size = UDim2.new(1, 0, 0, expanded and (35 + (#list * 30) + 4) or 35)})
                icon.Text = expanded and "^" or "v"
            end)

            for _, item in ipairs(list) do
                local iBtn = Instance.new("TextButton", dropFrame)
                iBtn.Size = UDim2.new(1, -8, 0, 28)
                iBtn.BackgroundColor3 = Theme.SectionBg
                iBtn.Text = item
                iBtn.TextColor3 = Theme.SubText
                iBtn.Font = Enum.Font.Gotham
                iBtn.TextSize = 12
                Instance.new("UICorner", iBtn).CornerRadius = UDim.new(0, 4)

                iBtn.MouseButton1Click:Connect(function()
                    btn.Text = "  " .. name .. " : " .. item
                    expanded = false
                    icon.Text = "v"
                    CreateTween(dropFrame, {0.3, Enum.EasingStyle.Exponential}, {Size = UDim2.new(1, 0, 0, 35)})
                    pcall(callback, item)
                end)
            end
        end

        function obj:Input(name, callback)
            local inFrame = Instance.new("Frame", container)
            inFrame.Size = UDim2.new(1, 0, 0, 40)
            inFrame.BackgroundTransparency = 1

            local label = Instance.new("TextLabel", inFrame)
            label.Size = UDim2.new(0.5, 0, 1, 0)
            label.BackgroundTransparency = 1
            label.Text = name
            label.TextColor3 = Theme.Text
            label.Font = Enum.Font.GothamMedium
            label.TextSize = 13
            label.TextXAlignment = Enum.TextXAlignment.Left

            local box = Instance.new("TextBox", inFrame)
            box.Size = UDim2.new(0.5, 0, 0, 30)
            box.Position = UDim2.new(0.5, 0, 0, 5)
            box.BackgroundColor3 = Theme.ItemBg
            box.Text = ""
            box.PlaceholderText = "..."
            box.TextColor3 = Theme.Text
            box.PlaceholderColor3 = Theme.SubText
            box.Font = Enum.Font.Gotham
            box.TextSize = 12
            box.ClearTextOnFocus = false
            Instance.new("UICorner", box).CornerRadius = UDim.new(0, 6)

            box.FocusLost:Connect(function(e) if e then pcall(callback, box.Text) end end)
        end

        function obj:Paragraph(title, text)
            local pFrame = Instance.new("Frame", container)
            pFrame.Size = UDim2.new(1, 0, 0, 60)
            pFrame.BackgroundColor3 = Theme.ItemBg
            Instance.new("UICorner", pFrame).CornerRadius = UDim.new(0, 6)

            local pTitle = Instance.new("TextLabel", pFrame)
            pTitle.Size = UDim2.new(1, -20, 0, 20)
            pTitle.Position = UDim2.new(0, 10, 0, 5)
            pTitle.BackgroundTransparency = 1
            pTitle.Text = title
            pTitle.TextColor3 = Theme.Accent
            pTitle.Font = Enum.Font.GothamMedium
            pTitle.TextSize = 13
            pTitle.TextXAlignment = Enum.TextXAlignment.Left

            local pText = Instance.new("TextLabel", pFrame)
            pText.Size = UDim2.new(1, -20, 1, -30)
            pText.Position = UDim2.new(0, 10, 0, 25)
            pText.BackgroundTransparency = 1
            pText.Text = text
            pText.TextColor3 = Theme.SubText
            pText.Font = Enum.Font.Gotham
            pText.TextSize = 12
            pText.TextXAlignment = Enum.TextXAlignment.Left
            pText.TextYAlignment = Enum.TextYAlignment.Top
            pText.TextWrapped = true
        end
    end

    function window:Tab(name)
        local tabBtn = Instance.new("TextButton", tabContainer)
        tabBtn.Size = UDim2.new(1, -24, 0, 36)
        tabBtn.BackgroundColor3 = Theme.Accent
        tabBtn.BackgroundTransparency = 1
        tabBtn.Text = "   " .. name
        tabBtn.TextColor3 = Theme.SubText
        tabBtn.Font = Enum.Font.GothamMedium
        tabBtn.TextSize = 13
        tabBtn.TextXAlignment = Enum.TextXAlignment.Left
        Instance.new("UICorner", tabBtn).CornerRadius = UDim.new(0, 6)

        local line = Instance.new("Frame", tabBtn)
        line.Size = UDim2.new(0, 3, 0, 0)
        line.Position = UDim2.new(1, 10, 0.5, 0)
        line.BackgroundColor3 = Theme.Accent
        line.BorderSizePixel = 0
        Instance.new("UICorner", line).CornerRadius = UDim.new(1, 0)

        local tabContent = Instance.new("ScrollingFrame", contentContainer)
        tabContent.Size = UDim2.new(1, -40, 1, -60)
        tabContent.Position = UDim2.new(0, 20, 0, 45)
        tabContent.BackgroundTransparency = 1
        tabContent.Visible = false
        tabContent.ScrollBarThickness = 2
        tabContent.ScrollBarImageColor3 = Theme.ItemBg

        local layout = Instance.new("UIListLayout", tabContent)
        layout.Padding = UDim.new(0, 12)

        local tabObj = {}
        table.insert(window.Tabs, {Btn = tabBtn, Content = tabContent, Line = line})

        tabBtn.MouseButton1Click:Connect(function()
            for _, t in ipairs(window.Tabs) do
                t.Content.Visible = false
                CreateTween(t.Btn, {0.3, Enum.EasingStyle.Quad}, {BackgroundTransparency = 1, TextColor3 = Theme.SubText})
                CreateTween(t.Line, {0.3, Enum.EasingStyle.Exponential}, {Size = UDim2.new(0, 3, 0, 0), Position = UDim2.new(1, 10, 0.5, 0)})
            end
            tabContent.Visible = true
            CreateTween(tabBtn, {0.3, Enum.EasingStyle.Quad}, {BackgroundTransparency = 0, TextColor3 = Theme.DarkText})
            CreateTween(line, {0.3, Enum.EasingStyle.Exponential}, {Size = UDim2.new(0, 3, 0, 18), Position = UDim2.new(1, 10, 0.5, -9)})
        end)

        if not self.ActiveTab then
            self.ActiveTab = tabContent
            tabContent.Visible = true
            tabBtn.BackgroundTransparency = 0
            tabBtn.TextColor3 = Theme.DarkText
            line.Size = UDim2.new(0, 3, 0, 18)
            line.Position = UDim2.new(1, 10, 0.5, -9)
        end

        function tabObj:Section(secName)
            local secFrame = Instance.new("Frame", tabContent)
            secFrame.Size = UDim2.new(1, 0, 0, 45)
            secFrame.BackgroundColor3 = Theme.SectionBg
            Instance.new("UICorner", secFrame).CornerRadius = UDim.new(0, 8)

            local secTitle = Instance.new("TextLabel", secFrame)
            secTitle.Size = UDim2.new(1, -30, 0, 25)
            secTitle.Position = UDim2.new(0, 15, 0, 10)
            secTitle.BackgroundTransparency = 1
            secTitle.Text = secName
            secTitle.TextColor3 = Theme.Text
            secTitle.Font = Enum.Font.GothamBold
            secTitle.TextSize = 13
            secTitle.TextXAlignment = Enum.TextXAlignment.Left

            local secDivider = Instance.new("Frame", secFrame)
            secDivider.Size = UDim2.new(1, -30, 0, 1)
            secDivider.Position = UDim2.new(0, 15, 0, 35)
            secDivider.BackgroundColor3 = Theme.ItemBg
            secDivider.BorderSizePixel = 0

            local secItems = Instance.new("Frame", secFrame)
            secItems.Size = UDim2.new(1, -30, 1, -45)
            secItems.Position = UDim2.new(0, 15, 0, 45)
            secItems.BackgroundTransparency = 1

            local secLayout = Instance.new("UIListLayout", secItems)
            secLayout.Padding = UDim.new(0, 8)
            secLayout:GetPropertyChangedSignal("AbsoluteContentSize"):Connect(function()
                secFrame.Size = UDim2.new(1, 0, 0, secLayout.AbsoluteContentSize.Y + 55)
            end)

            local secObj = {}
            BuildElements(secObj, secItems)
            return secObj
        end

        BuildElements(tabObj, tabContent)
        return tabObj
    end

    local loaderObj = {}
    if sysConfig.Loader then
        local loaderContainer = Instance.new("Frame", mainFrame)
        loaderContainer.Size = UDim2.new(1, 0, 1, 0)
        loaderContainer.BackgroundTransparency = 1
        loaderContainer.ZIndex = 200

        local leftPanel = Instance.new("Frame", loaderContainer)
        leftPanel.Size = UDim2.new(0.5, 0, 1, 0)
        leftPanel.Position = UDim2.new(0, 0, 0, 0)
        leftPanel.BackgroundColor3 = Theme.MainBg
        leftPanel.BorderSizePixel = 0
        leftPanel.ZIndex = 201

        local rightPanel = Instance.new("Frame", loaderContainer)
        rightPanel.Size = UDim2.new(0.5, 0, 1, 0)
        rightPanel.Position = UDim2.new(0.5, 0, 0, 0)
        rightPanel.BackgroundColor3 = Theme.MainBg
        rightPanel.BorderSizePixel = 0
        rightPanel.ZIndex = 201

        local centerLine = Instance.new("Frame", loaderContainer)
        centerLine.Size = UDim2.new(0, 2, 1, 0)
        centerLine.Position = UDim2.new(0.5, -1, 0, 0)
        centerLine.BackgroundColor3 = Theme.Accent
        centerLine.BorderSizePixel = 0
        centerLine.ZIndex = 202

        local loaderText = Instance.new("TextLabel", loaderContainer)
        loaderText.Size = UDim2.new(1, 0, 1, 0)
        loaderText.BackgroundTransparency = 1
        loaderText.Text = "Loading Engine..."
        loaderText.TextColor3 = Theme.Text
        loaderText.Font = Enum.Font.GothamMedium
        loaderText.TextSize = 16
        loaderText.ZIndex = 205

        local isStarted = false
        local isEnded = false

        function loaderObj:Start()
            isStarted = true
            loaderContainer.Visible = true
            task.spawn(function()
                while not isEnded do
                    CreateTween(centerLine, {0.5, Enum.EasingStyle.Sine, Enum.EasingDirection.InOut}, {BackgroundTransparency = 0.8})
                    task.wait(0.5)
                    CreateTween(centerLine, {0.5, Enum.EasingStyle.Sine, Enum.EasingDirection.InOut}, {BackgroundTransparency = 0})
                    task.wait(0.5)
                end
            end)
        end

        function loaderObj:SetText(txt)
            if isStarted and not isEnded then
                CreateTween(loaderText, {0.15, Enum.EasingStyle.Quad}, {TextTransparency = 1})
                task.wait(0.15)
                loaderText.Text = txt
                CreateTween(loaderText, {0.15, Enum.EasingStyle.Quad}, {TextTransparency = 0})
            end
        end

        function loaderObj:End()
            if isStarted and not isEnded then
                isEnded = true
                CreateTween(loaderText, {0.2, Enum.EasingStyle.Quad}, {TextTransparency = 1})
                CreateTween(centerLine, {0.3, Enum.EasingStyle.Exponential}, {Size = UDim2.new(0, 2, 0, 0), Position = UDim2.new(0.5, -1, 0.5, 0)})
                task.wait(0.3)

                CreateTween(leftPanel, {0.6, Enum.EasingStyle.Exponential, Enum.EasingDirection.InOut}, {Position = UDim2.new(-0.5, 0, 0, 0)})
                CreateTween(rightPanel, {0.6, Enum.EasingStyle.Exponential, Enum.EasingDirection.InOut}, {Position = UDim2.new(1, 0, 0, 0)})

                task.delay(0.6, function()
                    loaderContainer:Destroy()
                end)
            end
        end
        loaderObj:Start()
    else
        loaderObj = nil
    end

    return window, loaderObj
end

return Library