Drawing a colored, formatted box with Pastel and Cleo

[lighth7015]

Pastel is wonderful, however I'm trying to draw a UTF-8 box and not have the bounds become warped.

Sample command-

from cleo import Application, Command
from pastel import Pastel

class BoxDrawCommand(Command):
    """
    Draws a box.

    box:draw
    """

    def box(self, text, **keyword):
        contents, p = text.split("\n"), Pastel()
        length = len(p.colorize(max(contents, key = len))) + 4

        self.line( "\n┌{}┐".format( "─" * ( (length + 1) * 2 )))

        for line in contents:
            pos = 1 if len(line) is 0 else len(line) + 2
            style = keyword.get( "style", "info" )

            self.line("│<{}> {} </>│".format( style, line.ljust(pos)))

        self.line( "└{}┘\n".format( "─" * length ))

    def handle(self):
        self.box( "Email client", style = "comment" )

app = Application()
app.add(BoxDrawCommand())

if __name__ == '__main__':
    app.run()

Any suggestions for fixing the top and bottom box border drawing?