from tkinter import *

def limpar():
    Distância_entrada.delete(0, END)
    Massa1_entrada.delete(0, END)
    Massa2_entrada.delete(0, END)
    resultado.set("Aguardando cálculo...")

def app():
    try:
        m1 = Massa1.get()
        m2 = Massa2.get()
        r = Distância.get()
        G = 6.67430e-11
        F = G * (m1 * m2) / (r ** 2)
        mensagem = f"A força gravitacional entre as massas é\naproximadamente {round(F, 2)} Newtons"
        resultado.set(mensagem)
    except Exception as e:
        resultado.set("Erro nos dados. Verifique as entradas.")

root = Tk()
root.geometry("550x500")
root.resizable(0, 0)
root.config(bg="#1c4f61")
root.title("Lei de Gravitação Universal")

titulo = Label(text="Lei de Gravitação Universal",
               font=("Arial", "28", "bold"), bg="#1c4f61", fg="#d9ead3")
titulo.place(relx=0.05, rely=0.05)

texto_sub1 = Label(text="Massa 1:",
                   font=("Arial", "20", "bold"), bg="#1c4f61", fg="#d9ead3")
texto_sub1.place(relx=0.25, rely=0.2)

texto_sub2 = Label(text="Massa 2:",
                   font=("Arial", "20", "bold"), bg="#1c4f61", fg="#d9ead3")
texto_sub2.place(relx=0.25, rely=0.35)

texto_sub3 = Label(text="Distância entre os centros\nde massa das duas partículas:",
                   font=("Arial", "15", "bold"), bg="#1c4f61", fg="#d9ead3")
texto_sub3.place(relx=0.05, rely=0.5)

Massa1 = DoubleVar()
Massa1_entrada = Entry(textvariable=Massa1,
                       font=("Arial", "12", "bold"),
                       bg="white", fg="blue", justify='center')
Massa1_entrada.place(relx=0.55, rely=0.2, relwidth=0.35)

Massa2 = DoubleVar()
Massa2_entrada = Entry(textvariable=Massa2,
                       font=("Arial", "12", "bold"),
                       bg="white", fg="blue", justify='center')
Massa2_entrada.place(relx=0.55, rely=0.35, relwidth=0.35)

Distância = DoubleVar()
Distância_entrada = Entry(textvariable=Distância,
                          font=("Arial", "12", "bold"),
                          bg="white", fg="blue", justify='center')
Distância_entrada.place(relx=0.65, rely=0.55, relwidth=0.28)

but1 = Button(text="Calcular", bd=2, bg='#107db2', fg='white',
              font=('verdana', 12, 'bold'), command=app)
but1.place(relx=0.05, rely=0.65, relwidth=0.25, relheight=0.1)

but_limpar = Button(text="Limpar", bd=2, bg='#107db2', fg='white',
                    font=('verdana', 12, 'bold'), command=limpar)
but_limpar.place(relx=0.35, rely=0.65, relwidth=0.25, relheight=0.1)

but_sair = Button(text="Sair", bd=2, bg='#107db2', fg='white',
                  font=('verdana', 12, 'bold'), command=root.destroy)
but_sair.place(relx=0.65, rely=0.65, relwidth=0.25, relheight=0.1)

resultado = StringVar()
resultado.set("Aguardando cálculo...")
resultado_texto = Label(textvariable=resultado,
                        font=("Arial", 12, "bold"), bg="#cfe2f3")
resultado_texto.place(relx=0.05, rely=0.8, relwidth=0.9, relheight=0.18)

root.mainloop()