Untitled

<style>
    div {
        background: red; /* All divs have red background */
    }

    body > div {
        border: 5px solid green;
    }
</style>

...
<body>
    <div>
        Background: Red
        Border:     5px solid green

        <div>
            Background: Red;
            No border
        </div>
    </div>
</body>