<p dir="auto">The CSS is correct but no matter which way it is written, the answer is incorrect.</p>
<p dir="auto">margin-top is not working correctly.</p>
<p dir="auto">.green-box {<br>
background-color: green;<br>
margin-right: 20px;<br>
margin-bottom: 20px;<br>
margin-left: 40px;<br>
margin-top: 20px;<br>
}</p>
<p dir="auto">.green-box {<br>
margin: 20px 20px 20px 40px;<br>
}</p>
<p dir="auto">The instructions say to make margin-top: 20px. By experimenting I determined it should be margin-top: 40px.</p>
<p dir="auto">In the instructions for the margin, you have the pixel setting for "Top" to 20px instead of 40px.</p>