navigation-bar styling sample

gistfile1.css

navigation-bar {
    color: blue;
    background-color: lightblue;
}

navigation-bar title {
    color: darkblue;
}

navigation-bar bar-button {
    color: red;
}

navigation-bar bar-button {
    background-color: linear-gradient(blue,red);
    background-size: 10 30;
    border-radius: 5;
}

navigation-bar back-bar-button {
    background-color: linear-gradient(blue,yellow);
    background-size: 30 30;
    border-radius: 5;
    shape: arrow-button-left;
    content-edge-inset  : 0 0 0 6;
}