I've big css where selector for same things are on different place.

Is there any tool which can rearrange the css based on same type selector?

This is just example.

#main h2 {
    font-size: 2em;
}
#sidebar h3 {
    font-size: 2em;
}

#main h1 {
    font-size: 3em;
}

#sidebar h4 {
    font-size: 1.6em;
}


#main #box h2 {
    font-size: 2em;
}

#sidebar ul li {
    font-size: 1em;
}

it should arranged like this

#main h1 {
    font-size: 3em;
}

#main h2 {
    font-size: 2em;
}

#main #box h2 {
    font-size: 2em;
}

#sidebar h3 {
    font-size: 2em;
}

#sidebar h4 {
    font-size: 1.6em;
}

#sidebar ul li {
    font-size: 1em;
}

if parent selector is same then all should be at same place.