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.box1{
    width: 300px;
    height: 300px;
}
.box2{
    width: 200px;
    height: 200px;
}
.border-with{
    border: solid 1px purple;
}
.padding-with{
    padding: 1px;
}
.style-pink{
    background-color: pink;
}
.style-green{
    background-color: green;
}
.margin-able{
    margin: 10px;
}
.margin-fix{
    overflow: hidden;
}

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<div class="box1 style-pink"></div>
<div class="box1 style-pink margin-able">
    <div class="box2 style-green margin-able"></div>
</div>