css all divs vs direct child divs

I have this structure:

<div class="Root">
    <div>ddddddd</div>
    <div>
        <div>pppppppppp</div>
        <div>pppppppppp</div>
    </div>
    <div>ddddddd</div>
<div>

I want to put borders on the divs that contain ddddddd, and I want to set the text color on all divs to green.

There are two rules:

1. I can't add class attributes.
2. I have to write selectors that start with .Root.

Any ideas?

Actually I was searching this:

Selects the divs that are direct children of Root:

.Root > div {
    border: 1px solid red;
}

Selects all the divs under Root:

.Root div {
    color:green;
}

Something like this?

.Root > :first-child, .Root > :last-child { border: 1px solid red }
.Root { color: green; }

Demo: http://jsfiddle.net/karim79/N5qFu/1/

I would advise you to go through this: http://www.w3.org/TR/css3-selectors/