I'm having trouble stopping my divs extending beyond the parent div when I add a margin. In the example below I've made the divs width 100%, then added margin-left: 32px; to the second div.
I want it to stay within the 100% width, but the margin-left seems to push it outside the parent div.
.parent {
    flex-direction: column;
    width: 100%;
    max-width: 540px;
    padding-right: 32px;
    padding-left: 32px;
    margin-right: auto;
    margin-left: auto;
    overflow: auto;
    float: none;
}
.child-1 {
    position: relative;
    width: 100%;
    background-color: blue;
}
.child-2 {
    padding-right: 15px;
    position: relative;
    padding-left: 15px;
    margin-left: 32px;
    width: 100%;
    background-color: yellow;
}
#parent-box {
  background-color: red;
}<div class="parent" id="parent-box">
  <div class="child-1"><p>test</p></div>
  <div class="child-2"><p>test box</p></div>
</div>