-- Settings
local DAMAGE_COLOR = Color3.fromRGB(255, 75, 75)
local DEATH_COLOR = Color3.fromRGB(255, 0, 0)
local HEAVY_HIT_THRESHOLD = 50
local DISPLAY_TIME = 1.3
local BASE_SHAKE = 0.12
local BASE_SIZE = 2.2 

local function formatDamage(amount)
    local absAmount = math.abs(amount)
    -- Custom Smart Decimals logic
    if absAmount % 1 == 0 then
        return tostring(math.floor(absAmount))
    else
        return string.format("%.1f", absAmount)
    end
end

local function createIndicator(targetPart, amount, isDeath)
    local billboard = Instance.new("BillboardGui")
    billboard.Size = UDim2.new(BASE_SIZE, 0, BASE_SIZE, 0)
    billboard.Adornee = targetPart
    billboard.AlwaysOnTop = true
    
    local label = Instance.new("TextLabel")
    label.Size = UDim2.new(1, 0, 1, 0)
    label.BackgroundTransparency = 1
    label.TextScaled = true
    label.Font = Enum.Font.Cartoon
    label.TextStrokeColor3 = Color3.fromRGB(0, 0, 0)
    label.TextStrokeTransparency = 0
    label.Rotation = math.random(-15, 15)
    
    local isHeavy = math.abs(amount) >= HEAVY_HIT_THRESHOLD
    
    if isDeath then
        label.Text = "DEATH"
        label.TextColor3 = DEATH_COLOR
    else
        label.Text = formatDamage(amount)
        label.TextColor3 = isHeavy and Color3.new(1, 1, 1) or DAMAGE_COLOR
    end
    
    label.Parent = billboard
    billboard.Parent = game.CoreGui
    
    task.spawn(function()
        local startTime = tick()
        while tick() - startTime < DISPLAY_TIME do
            local elapsed = tick() - startTime
            local progress = elapsed / DISPLAY_TIME
            
            if not targetPart or not targetPart.Parent then break end

            if isHeavy and not isDeath then
                label.TextColor3 = (math.sin(tick() * 25) > 0) and Color3.new(1, 1, 1) or Color3.new(1, 0, 0)
            end
            
            local currentShake = BASE_SHAKE
            if isDeath then
                currentShake = BASE_SHAKE * 3 
            elseif isHeavy then
                currentShake = BASE_SHAKE * 2
            end
            
            local yOffset = 3 + (progress * 3.5)
            local sizeMultiplier = 1.0
            if progress < 0.25 then
                sizeMultiplier = isDeath and 2.0 or (isHeavy and 1.7 or 1.4)
                sizeMultiplier = sizeMultiplier - (progress * 1.5)
            end
            
            billboard.Size = UDim2.new(BASE_SIZE * sizeMultiplier, 0, BASE_SIZE * sizeMultiplier, 0)
            
            local shakeX = (math.random() - 0.5) * currentShake
            local shakeY = (math.random() - 0.5) * currentShake
            
            -- Use StudsOffset to track the Head's world position accurately
            billboard.StudsOffset = Vector3.new(shakeX, yOffset + shakeY, 0)
            label.TextTransparency = progress
            label.TextStrokeTransparency = progress
            
            task.wait()
        end
        billboard:Destroy()
    end)
end

local function watchHumanoid(humanoid)
    local lastHealth = humanoid.Health
    humanoid.HealthChanged:Connect(function(newHealth)
        local delta = newHealth - lastHealth
        if delta <= -0.1 then
            -- Force targeting the Head for the pop-up
            local head = humanoid.Parent:FindFirstChild("Head")
            if head then
                local isDeath = (newHealth <= 0 and lastHealth > 0)
                createIndicator(head, delta, isDeath)
            end
        end
        lastHealth = newHealth
    end)
end

for _, v in pairs(workspace:GetDescendants()) do
    if v:IsA("Humanoid") then watchHumanoid(v) end
end

workspace.DescendantAdded:Connect(function(v)
    if v:IsA("Humanoid") then watchHumanoid(v) end
end)