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              <div class="container">
    <div class="content">
        If you're looking at this box a browser that's <em>not</em> an older version of Internet Explorer, it's actually 242 pixels wide, even though its <code>width</code> was set to <code>200px</code> (200 pixel content + 20 pixel padding on both sides + 1 pixel left and right border width).
              .container {
    & {
        width: 200px;
        padding: 20px;
        background: #eee;
        border: 1px solid black;
    > .content {
        background: #ddd;
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