local P = game:GetService("Players")
local UIS = game:GetService("UserInputService")
local CoreGui = game:GetService("CoreGui")
local player = P.LocalPlayer
local mouse = player:GetMouse()
local playerGui = player:WaitForChild("PlayerGui")

local safeContainer = (gethui and gethui()) or CoreGui:FindFirstChild("RobloxGui") or CoreGui
if safeContainer:FindFirstChild("DeltaUniversalEngine") then safeContainer.DeltaUniversalEngine:Destroy() end

local selMat = Enum.Material.Concrete
local selCol = BrickColor.new("Medium stone grey")
local selForm = "Block"
local activeTool = "None"

local matList = {
    {N = "Concrete", M = Enum.Material.Concrete, C = BrickColor.new("Medium stone grey")},
    {N = "Neon Glow", M = Enum.Material.Neon, C = BrickColor.new("Toothpaste")},
    {N = "Glass", M = Enum.Material.Glass, C = BrickColor.new("Light blue")},
    {N = "Forcefield", M = Enum.Material.ForceField, C = BrickColor.new("Really red")},
    {N = "Wood Planks", M = Enum.Material.WoodPlanks, C = BrickColor.new("Reddish brown")},
    {N = "Diamond Plate", M = Enum.Material.DiamondPlate, C = BrickColor.new("Dark stone grey")},
    {N = "Marble", M = Enum.Material.Marble, C = BrickColor.new("White")},
    {N = "Ice", M = Enum.Material.Ice, C = BrickColor.new("Pastel Blue")},
    {N = "Brick", M = Enum.Material.Brick, C = BrickColor.new("Rust")}
}

local formsList = {"Block", "Wedge", "Cylinder", "Sphere"}

UIS.InputBegan:Connect(function(input, processed)
    if processed then return end
    if input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch then
        local hitPos = mouse.Hit.p
        local targ = mouse.Target
        
        if mouse.Y < 180 and mouse.X > (mouse.ViewSizeX - 280) then return end

        if activeTool == "HAMMER" and hitPos then
            local p
            if selForm == "Wedge" then p = Instance.new("WedgePart") p.Size = Vector3.new(5, 5, 5)
            elseif selForm == "Cylinder" then p = Instance.new("Part") p.Shape = Enum.PartType.Cylinder p.Size = Vector3.new(5, 5, 5)
            elseif selForm == "Sphere" then p = Instance.new("Part") p.Shape = Enum.PartType.Ball p.Size = Vector3.new(5, 5, 5)
            else p = Instance.new("Part") p.Size = Vector3.new(5, 1, 5) end
            p.BrickColor = selCol; p.Material = selMat; p.Anchored = true; p.CanCollide = true; p.Name = "DeltaCustomBlock"
            p.Position = Vector3.new(hitPos.X, hitPos.Y + (p.Size.Y / 2), hitPos.Z); p.Parent = workspace
        elseif activeTool == "DELETE" then
            if targ and targ.Name == "DeltaCustomBlock" then targ:Destroy() end
        end
    end
end)

local screenGui = Instance.new("ScreenGui")
screenGui.Name = "DeltaUniversalEngine"
screenGui.ResetOnSpawn = false
screenGui.Parent = safeContainer

local matFrame = Instance.new("Frame")
matFrame.Size = UDim2.new(0, 110, 0, 150)
matFrame.Position = UDim2.new(1, -120, 0, 0)
matFrame.BackgroundColor3 = Color3.fromRGB(15, 15, 18)
matFrame.BorderSizePixel = 0; matFrame.Visible = false; matFrame.Parent = screenGui
Instance.new("UICorner", matFrame).CornerRadius = UDim.new(0, 5)

local matTitle = Instance.new("TextLabel")
matTitle.Size = UDim2.new(1, 0, 0, 24); matTitle.BackgroundColor3 = Color3.fromRGB(24, 24, 28)
matTitle.Text = "🔨 Materials"; matTitle.TextColor3 = Color3.fromRGB(220, 220, 220)
matTitle.Font = Enum.Font.SourceSansBold; matTitle.TextSize = 11; matTitle.Parent = matFrame

local matScroll = Instance.new("ScrollingFrame")
matScroll.Size = UDim2.new(1, 0, 1, -24); matScroll.Position = UDim2.new(0, 0, 0, 24)
matScroll.BackgroundTransparency = 1; matScroll.BorderSizePixel = 0; matScroll.ScrollBarThickness = 3
matScroll.CanvasSize = UDim2.new(0, 0, 0, (#matList * 26)); matScroll.Parent = matFrame
local matLayout = Instance.new("UIListLayout")
matLayout.HorizontalAlignment = Enum.HorizontalAlignment.Center; matLayout.Padding = UDim.new(0, 3); matLayout.Parent = matScroll

for _, choice in ipairs(matList) do
    local btn = Instance.new("TextButton")
    btn.Size = UDim2.new(0.92, 0, 0, 22); btn.BackgroundColor3 = Color3.fromRGB(30, 30, 35)
    btn.Text = choice.N; btn.TextColor3 = Color3.fromRGB(255, 255, 255); btn.Font = Enum.Font.SourceSansBold; btn.TextSize = 10; btn.Parent = matScroll
    Instance.new("UICorner", btn).CornerRadius = UDim.new(0, 3)
    btn.MouseButton1Click:Connect(function() selMat = choice.M; selCol = choice.C end)
end

local formFrame = Instance.new("Frame")
formFrame.Size = UDim2.new(0, 110, 0, 150)
formFrame.Position = UDim2.new(1, -235, 0, 0)
formFrame.BackgroundColor3 = Color3.fromRGB(15, 15, 18)
formFrame.BorderSizePixel = 0; formFrame.Visible = false; formFrame.Parent = screenGui
Instance.new("UICorner", formFrame).CornerRadius = UDim.new(0, 5)

local formTitle = Instance.new("TextLabel")
formTitle.Size = UDim2.new(1, 0, 0, 24); formTitle.BackgroundColor3 = Color3.fromRGB(24, 24, 28)
formTitle.Text = "📐 Forms"; formTitle.TextColor3 = Color3.fromRGB(220, 220, 220)
formTitle.Font = Enum.Font.SourceSansBold; formTitle.TextSize = 11; formTitle.Parent = formFrame

local formScroll = Instance.new("ScrollingFrame")
formScroll.Size = UDim2.new(1, 0, 1, -24); formScroll.Position = UDim2.new(0, 0, 0, 24)
formScroll.BackgroundTransparency = 1; formScroll.BorderSizePixel = 0; formScroll.ScrollBarThickness = 3
formScroll.CanvasSize = UDim2.new(0, 0, 0, (#formsList * 26)); formScroll.Parent = formFrame
local formLayout = Instance.new("UIListLayout")
formLayout.HorizontalAlignment = Enum.HorizontalAlignment.Center; formLayout.Padding = UDim.new(0, 3); formLayout.Parent = formScroll

for _, formName in ipairs(formsList) do
    local btn = Instance.new("TextButton")
    btn.Size = UDim2.new(0.92, 0, 0, 22); btn.BackgroundColor3 = Color3.fromRGB(30, 30, 35)
    btn.Text = formName; btn.TextColor3 = Color3.fromRGB(255, 255, 255); btn.Font = Enum.Font.SourceSansBold; btn.TextSize = 10; btn.Parent = formScroll
    Instance.new("UICorner", btn).CornerRadius = UDim.new(0, 3)
    btn.MouseButton1Click:Connect(function() selForm = formName end)
end

---------------------------------------------
-- 🧰 DRAGGABLE MAIN WINDOW FRAME
---------------------------------------------
local mainContainer = Instance.new("Frame")
mainContainer.Size = UDim2.new(0, 120, 0, 95) -- Made frame taller for titles
mainContainer.Position = UDim2.new(0, 10, 0, 100) 
mainContainer.BackgroundColor3 = Color3.fromRGB(15, 15, 18)
mainContainer.BorderSizePixel = 0
mainContainer.Active = true
mainContainer.Draggable = true -- Allows you to hold and drag the window anywhere
mainContainer.Parent = screenGui
Instance.new("UICorner", mainContainer).CornerRadius = UDim.new(0, 6)

-- Subtitle Credit
local subLabel = Instance.new("TextLabel")
subLabel.Size = UDim2.new(1, 0, 0, 12)
subLabel.Position = UDim2.new(0, 0, 0, 4)
subLabel.BackgroundTransparency = 1
subLabel.Text = "Made By IUSESCRIPTS_000"
subLabel.TextColor3 = Color3.fromRGB(160, 160, 170)
subLabel.Font = Enum.Font.SourceSansItalic
subLabel.TextSize = 8
subLabel.Parent = mainContainer

-- Primary System Title
local titleLabel = Instance.new("TextLabel")
titleLabel.Size = UDim2.new(1, 0, 0, 16)
titleLabel.Position = UDim2.new(0, 0, 0, 15)
titleLabel.BackgroundTransparency = 1
titleLabel.Text = "BUILDING SCRIPT"
titleLabel.TextColor3 = Color3.fromRGB(255, 255, 255)
titleLabel.Font = Enum.Font.SourceSansBold
titleLabel.TextSize = 11
titleLabel.Parent = mainContainer

local hammerBtn = Instance.new("TextButton")
hammerBtn.Size = UDim2.new(0, 45, 0, 45)
hammerBtn.Position = UDim2.new(0, 10, 0, 42) -- Shifted buttons down under headers
hammerBtn.BackgroundColor3 = Color3.fromRGB(30, 30, 35)
hammerBtn.Text = "🔨"; hammerBtn.TextSize = 20; hammerBtn.Parent = mainContainer
Instance.new("UICorner", hammerBtn).CornerRadius = UDim.new(0, 5)

local deleteBtn = Instance.new("TextButton")
deleteBtn.Size = UDim2.new(0, 45, 0, 45)
deleteBtn.Position = UDim2.new(0, 65, 0, 42) -- Shifted buttons down under headers
deleteBtn.BackgroundColor3 = Color3.fromRGB(30, 30, 35)
deleteBtn.Text = "💥"; deleteBtn.TextSize = 20; deleteBtn.Parent = mainContainer
Instance.new("UICorner", deleteBtn).CornerRadius = UDim.new(0, 5)

hammerBtn.MouseButton1Click:Connect(function()
    if activeTool == "HAMMER" then
        activeTool = "None"
        hammerBtn.BackgroundColor3 = Color3.fromRGB(30, 30, 35)
        matFrame.Visible = false; formFrame.Visible = false
    else
        activeTool = "HAMMER"
        hammerBtn.BackgroundColor3 = Color3.fromRGB(46, 117, 89)
        deleteBtn.BackgroundColor3 = Color3.fromRGB(30, 30, 35)
        matFrame.Visible = true; formFrame.Visible = true
    end
end)

deleteBtn.MouseButton1Click:Connect(function()
    if activeTool == "DELETE" then
        activeTool = "None"
        deleteBtn.BackgroundColor3 = Color3.fromRGB(30, 30, 35)
    else
        activeTool = "DELETE"
        deleteBtn.BackgroundColor3 = Color3.fromRGB(180, 50, 50)
        hammerBtn.BackgroundColor3 = Color3.fromRGB(30, 30, 35)
        matFrame.Visible = false; formFrame.Visible = false
    end
end)