How can a parent element override a child's pseudo-element?

Question

css

I want parent to overlap child

<div class="parent">
  <div class="child"></div>
</div>

.parent {
  width: 100px;
  height: 100px;
  background: green;
  position: relative;
  z-index: 100;
}

.child {
  position: relative;
  z-index: 90;
}

.child:before {
  content: "";
  position: absolute;
  background: red;
  width: 50px;
  height: 50px;
  top: 60px;
  left: 60px;
  z-index: 10;
}

https://jsfiddle.net/L4t6gsdf/1/

Answer 1

Answer 2

.parent {
    width: 100px;
    height: 100px;
    background: green;
    position: relative;
    overflow: hidden;
}

.child {
    position: relative;
    z-index: -1;
}
.child:before {
    content: "";
    position: absolute;
    background: red;
    width: 50px;
    height: 50px;
    top: 60px;
    left: 60px;
    z-index: 10;
}

So?