@settings(defaultLengthUnit = mm)

// Change width to 90 for a wider body and lid.
width = 80
depth = 60
height = 24
wall = 2
floor = 2
lidThickness = 2

blank = startSketchOn(XY)
  |> rectangle(corner = [-width / 2, -depth / 2], width = width, height = depth)
  |> extrude(length = height)

body = startSketchOn(blank, face = END)
  |> rectangle(corner = [-width / 2 + wall, -depth / 2 + wall], width = width - 2 * wall, height = depth - 2 * wall)
  |> extrude(length = -(height - floor))

// A separate flat lid shares the body's outer dimensions.
lid = startSketchOn(XY)
  |> rectangle(corner = [-width / 2, -depth / 2], width = width, height = depth)
  |> extrude(length = lidThickness)