How do I stop my divs from moving on other computers : <p>On my website template I have divs that look fine on my screen. but if I restore down the browser or look at it on another computer the divs are moved.
Is there some sort of tag I can use to make my div stay in place.</p>

<p>//example of a div </p>

<pre><code>#divtest{
    width:450px;
    height:75px;
    margin:20px;
    margin-top: 150px;
    display:flex;
    border-width: 2px;
    border-color: black;
    border-style: solid;
    margin-left: -7%;
}
</code></pre>
