Margin collpase workaround

by Luiz Silva

HTML

<hr/>
<div class="wrapper">
      <div class="box"></div>
      <div class="box"></div>
      <div class="box"></div>
  </div>
<hr/>

CSS

.box {
    background-color: black;
    box-sizing: border-box;
    height: 48px;
    width: 100%;
    margin: 7px 0;
    display: inline-block;
}

.wrapper {
    font-size: 0;
}