Challenge with CSS Box Shadow

Hey there, I've been attempting to add a shadow effect to a box inside another box but I'm struggling to achieve the desired outcome.

<div class="box effect2">
    <div class="box effect2">
        Box inside a box
    <div>
<div>

CSS Styles

.box {
    width:70%;
    height:200px;
    background:#FFF;
    margin:40px auto;
}


    .effect2
    {
      position: relative;
    }
    .effect2:before, .effect2:after
    {
      z-index: -1;
      position: absolute;
      content: "";
      bottom: 15px;
      left: 10px;
      width: 50%;
      top: 80%;
      max-width:300px;
      background: #777;
      -webkit-box-shadow: 0 15px 10px #777;
      -moz-box-shadow: 0 15px 10px #777;
      box-shadow: 0 15px 10px #777;
      -webkit-transform: rotate(-3deg);
      -moz-transform: rotate(-3deg);
      -o-transform: rotate(-3deg);
      -ms-transform: rotate(-3deg);
      transform: rotate(-3deg);
    }
    .effect2:after
    {
      -webkit-transform: rotate(3deg);
      -moz-transform: rotate(3deg);
      -o-transform: rotate(3deg);
      -ms-transform: rotate(3deg);
      transform: rotate(3deg);
      right: 10px;
      left: auto;
    }

I attempted to implement this code without success. Please let me know if there is any mistake in my approach. I referred to the CSS Tricks website for inspiration.

css

Answer №1

Transforming my initial comment into a complete answer. If you set the z-index to -1, both shadows will be present below everything else.

.box {
  width: 70%;
  height: 200px;
  background: #FFF;
  margin: 40px auto;
}

.effect2, .effect3 {
  position: relative;
}

.effect2:before,
.effect2:after {
  z-index: -1;
  position: absolute;
  content: "";
  bottom: 15px;
  left: 10px;
  width: 50%;
  top: 80%;
  max-width: 300px;
  background: #777;
  -webkit-box-shadow: 0 15px 10px #777;
  -moz-box-shadow: 0 15px 10px #777;
  box-shadow: 0 15px 10px #777;
  -webkit-transform: rotate(-3deg);
  -moz-transform: rotate(-3deg);
  -o-transform: rotate(-3deg);
  -ms-transform: rotate(-3deg);
  transform: rotate(-3deg);
}

.effect2:after {
  -webkit-transform: rotate(3deg);
  -moz-transform: rotate(3deg);
  -o-transform: rotate(3deg);
  -ms-transform: rotate(3deg);
  transform: rotate(3deg);
  right: 10px;
  left: auto;
}

.effect3:before,
.effect3:after {
  z-index: -1;
  position: absolute;
  content: "";
  bottom: 15px;
  left: 10px;
  width: 50%;
  top: 80%;
  max-width: 300px;
  background: #cc0000;
  -webkit-box-shadow: 0 15px 10px #cc0000;
  -moz-box-shadow: 0 15px 10px #cc0000;
  box-shadow: 0 15px 10px #cc0000;
  -webkit-transform: rotate(-3deg);
  -moz-transform: rotate(-3deg);
  -o-transform: rotate(-3deg);
  -ms-transform: rotate(-3deg);
  transform: rotate(-3deg);
}
<div class="box effect2">
  <div class="box effect3">
    there's a box inside another
  </div>
</div>

To illustrate what's happening, I introduced an additional class for the innermost box. It may prove challenging to apply this particular style of drop shadow to parent and child elements due to the z-indexes conflicting with each other.

UPDATE*** Here's how you can achieve the desired outcome. An extra element had to be included:

.box1 {
  background: #fff;
  width: 400px;
  height: 400px;
  position: relative;
}

.wrap {
  position: relative;
  z-index: 5;
}

.box2 {
  background: #ccc;
  width: 200px;
  height: 200px;
  margin: 10px;
  position: absolute;
}

.effect1:before,
.effect1:after {
  z-index: -1;
  position: absolute;
  content: "";
  bottom: 15px;
  left: 10px;
  width: 50%;
  top: 80%;
  max-width: 300px;
  background: #777;
  box-shadow: 0 15px 10px #777;
  transform: rotate(-3deg);
}

.effect1:after {
  transform: rotate(3deg);
  right: 10px;
  left: auto;
}


.effect2:before,
.effect2:after {
  z-index: -1;
  position: absolute;
  content: "";
  bottom: 15px;
  left: 10px;
  width: 50%;
  top: 80%;
  max-width: 300px;
  background: #777;
  box-shadow: 0 15px 10px #777;
  transform: rotate(-3deg);
}

.effect2:after {
  transform: rotate(3deg);
  right: 10px;
  left: auto;
}
<div class="box1 effect1">
  <div class="wrap">
    <div class="box2 effect2">my item</div>
  </div>
</div>

Fiddle Solution: https://jsfiddle.net/9nqcx28a/8/

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