Center divs inside div

Question

I have two tables inside divs inside another div:

HTML

<div class="container center">
    <div class="thing">
        <table class="tabel center" style="width:230px">
            <tr><td>Example</td></tr>
        </table>
    </div>

    <div class="thing">
        <table class="tabel center" style="width:230px">
            <tr><td>Example</td></tr>
        </table>
    </div>
</div>

CSS

.container {
    width: 100%;
    overflow: hidden;
    float: left;
    border: 1px solid red;
    text-align: center;
}
.tabel {
    border: 1px solid black;
    border-collapse: collapse;
    padding: 5px;
}
.thing {
    width: 50%;
    float: left;
    min-width: 230px;
}

.center {
   margin: 0 auto;
}

The two cells are centered correctly

[Image deleted by host]

but when the width of the screen gets too small, the cells go underneith each other (what I want), but they no longer get centered:

[Image deleted by host]

So what I want them to look like:

[Image deleted by host]

Answer 1

You have to remove float: left;, set display: inline-block; and eliminate white space between them.

.thing {
    width: 50%;
    display: inline-block;
    /* float: left; */
    min-width: 230px;
    vertical-align: top;
}

fiddle: http://jsfiddle.net/3g7xk0sj/1/