block-in-inlines-in-different-spans-margin-collapse-ref.html

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<!DOCTYPE html>

<title>CSS Reference</title>

<link rel="stylesheet" type="text/css" href="/fonts/ahem.css">

<style>

.container { width: 100px; font: 20px/1 Ahem; }

.first { width: 100px; height: 20px; margin-bottom: 40px; background: green; }

.second { width: 100px; height: 20px; margin-top: 30px; background: green; }

</style>

<p>Two green squares separated by a 40px gap (margins collapse).</p>

<div class="container">

    <div class="first"></div>

    <div class="second"></div>

</div>