boxStylingWithGuiZero

from guizero import Box, App, PushButton, TextBox, Text



app = App(height=450, width=300)

box_header = Box(app, align="top", border=1, width="fill", height=100)
box_header.bg = "dark blue"

box_body = Box(app, align="top", border=0, width="fill", height=300)
box_body.bg = "blue"


box_footer = Box(app, align="bottom", border=0, width="fill", height=50)
box_footer.bg = "light blue"

lbl_header = Text(box_header, "HEADER")
lbl_header.text_color = "white"
lbl_header.text_size = 24

lbl_body = Text(box_body, "This is starting to")
lbl_body2 = Text(box_body, "feel a lot like")
lbl_body3 = Text(box_body, "styling with CSS!")

lbl_body.text_color = "#ffffff"
lbl_body.text_size = 18
lbl_body2.text_color = "#ffffff"
lbl_body2.text_size = 18
lbl_body3.text_color = "#ffffff"
lbl_body3.text_size = 18


lbl_footer = Text(box_footer, "FOOTER")
lbl_footer.text_color = "black"
lbl_footer.text_size = 14

app.display()