<html>
<head>
<style>
.container {
    width: 90px;
    height: 90px;
    color: green;
    background-color: red;
    font: 30px/1 Ahem, sans-serif;
    margin: 10px;
    -webkit-font-smoothing: antialiased;
}

.content-box {
    -webkit-shape-outside: content-box;
    -webkit-shape-margin: 5px;
    background-clip: padding-box;  /* padding box matches shape-outside + shape-margin */
    width: 25px;
    height: 20px;
    padding: 5px;
    margin: 30px 60px;
}

.padding-box {
    -webkit-shape-outside: padding-box;
    -webkit-shape-margin: 5px;
    background-clip: border-box; /* border box matches shape-outside + shape-margin */
    width: 20px;
    height: 10px;
    padding: 5px;
    border: 5px solid transparent;
    margin: 30px 60px;
}

.border-box {
    -webkit-shape-outside: border-box;
    -webkit-shape-margin: 5px;
    background-clip: border-box; /* shape-outside is 5 pixels from the border-box */
    width: 20px;
    height: 10px;
    border: 5px solid transparent;
    margin: 35px 65px;
}

.margin-box {
    -webkit-shape-outside: margin-box;
    -webkit-shape-margin: 5px; /* has no effect, shape is clipped to the margin-box */
    background-clip: content-box; 
    width: 25px;
    height: 20px;
    margin: 5px;
}

.shape {
    background-color: green;
    float: left;
    padding-left: 0px;
    border-left: 0px;
    margin-left: 0px;
}
</style>
</head>
<body>
    <p>Verify that shape-margin has the expected effect on the four possible shape-outside box values for left floats.</p>

    <p>shape-outside: content-box</p>
    <div class='container'>
        <div class='shape content-box'></div>
        xxx xx xxx
    </div>

    <p>shape-outside: padding-box</p>
    <div class='container'>
        <div class='shape padding-box'></div>
        xxx xx xxx
    </div>

    <p>shape-outside: border-box</p>
    <div class='container' style="background: blue">
        <div class='shape border-box'></div>
        xxx xx xxx
    </div>

    <p>shape-outside: margin-box</p>
    <div class='container' style="background: blue">
        <div class='shape margin-box'></div>
        xx xxx xxx
    </div>
</body>
</html>