Drop Shadow

The Code

HTML

<div class="row">
  <div class="col-xxs-12 col-default-6"><div class="drop-shadow lifted"><p>Lifted corners</p></div></div>
  <div class="col-xxs-12 col-default-6"><div class="drop-shadow curled"><p>Curled corners</p></div></div>
  <div class="col-xxs-12 col-default-6"><div class="drop-shadow perspective"><p>Perspective</p></div></div>
  <div class="col-xxs-12 col-default-6"><div class="drop-shadow raised"><p>Raised box</p></div></div>
  <div class="col-xxs-12 col-default-6"><div class="drop-shadow curved curved-vt-1"><p>Single vertical curve</p></div></div>
  <div class="col-xxs-12 col-default-6"><div class="drop-shadow curved curved-vt-2"><p>Vertical curves</p></div></div>
  <div class="col-xxs-12 col-default-6"><div class="drop-shadow curved curved-hz-1"><p>Single horizontal curve</p></div></div>
  <div class="col-xxs-12 col-default-6"><div class="drop-shadow curved curved-hz-2"><p>Horizontal curves</p></div></div>
  <div class="col-xxs-12 col-default-6"><div class="drop-shadow lifted rotated"><p>Rotated box</p></div></div>
</div>

CSS

.drop-shadow {
  position:relative;
  transform: translate3d(0,0,0);
}
.drop-shadow:before, .drop-shadow:after {
  content:"";
  position:absolute;
  z-index:-2;
}
.drop-shadow > :first-child:before {
  content:"";
  position:absolute;
  z-index:-1;
  top:0;
  bottom:0;
  left:0;
  right:0;
  background:#fff;
  -webkit-box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
     -moz-box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
          box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
}

.drop-shadow p { /* NOT NEEDED IN FINAL FORM */
  vertical-align: middle;
  line-height: 150px;
  text-align: center;
  color: #555;
  text-shadow: none;
  font-family: 'Comic Sans', 'Comic Sans MS', 'Chalkboard', 'ChalkboardSE-Regular', 'Marker Felt', 'Purisa', 'URW Chancery L', cursive;
}


.lifted {
  -moz-border-radius:4px;
      border-radius:4px;
}
.lifted:before, .lifted:after {
  bottom:15px;
  left:10px;
  width:50%;
  height:20%;
  max-width:300px;
  -webkit-box-shadow:0 15px 10px rgba(0, 0, 0, 0.7);
     -moz-box-shadow:0 15px 10px rgba(0, 0, 0, 0.7);
          box-shadow:0 15px 10px rgba(0, 0, 0, 0.7);
  -webkit-transform:rotate(-3deg);
     -moz-transform:rotate(-3deg);
      -ms-transform:rotate(-3deg);
       -o-transform:rotate(-3deg);
          transform:rotate(-3deg);
}
.lifted:after {
  right:10px;
  left:auto;
  -webkit-transform:rotate(3deg);
     -moz-transform:rotate(3deg);
      -ms-transform:rotate(3deg);
       -o-transform:rotate(3deg);
          transform:rotate(3deg);
}

.curled {
  -moz-border-radius:0 0 120px 120px / 0 0 6px 6px;
       border-radius:0 0 120px 120px / 0 0 6px 6px;
}
.curled:before, .curled:after {
  bottom:12px;
  left:10px;
  width:50%;
  height:55%;
  max-width:200px;
  -webkit-box-shadow:0 8px 12px rgba(0, 0, 0, 0.5);
     -moz-box-shadow:0 8px 12px rgba(0, 0, 0, 0.5);
          box-shadow:0 8px 12px rgba(0, 0, 0, 0.5);
  -webkit-transform:skew(-8deg) rotate(-3deg);
     -moz-transform:skew(-8deg) rotate(-3deg);
      -ms-transform:skew(-8deg) rotate(-3deg);
       -o-transform:skew(-8deg) rotate(-3deg);
          transform:skew(-8deg) rotate(-3deg);
}
.curled:after {
  right:10px;
  left:auto;
  -webkit-transform:skew(8deg) rotate(3deg);
     -moz-transform:skew(8deg) rotate(3deg);
      -ms-transform:skew(8deg) rotate(3deg);
       -o-transform:skew(8deg) rotate(3deg);
          transform:skew(8deg) rotate(3deg);
}
.curled > :first-child:before {
  -moz-border-radius:0 0 120px 120px / 0 0 6px 6px;
       border-radius:0 0 120px 120px / 0 0 6px 6px;
}

.perspective:before {
  left:80px;
  bottom:5px;
  width:50%;
  height:35%;
  max-width:200px;
  -webkit-box-shadow:-80px 0 8px rgba(0, 0, 0, 0.4);
     -moz-box-shadow:-80px 0 8px rgba(0, 0, 0, 0.4);
          box-shadow:-80px 0 8px rgba(0, 0, 0, 0.4);
  -webkit-transform:skew(50deg);
     -moz-transform:skew(50deg);
      -ms-transform:skew(50deg);
       -o-transform:skew(50deg);
          transform:skew(50deg);
  -webkit-transform-origin:0 100%;
     -moz-transform-origin:0 100%;
      -ms-transform-origin:0 100%;
       -o-transform-origin:0 100%;
          transform-origin:0 100%;
}
.perspective:after {
  display:none;
}

.raised { /* no pseudo-elements needed */
  -webkit-box-shadow: 0 15px 10px -10px rgba(0, 0, 0, 0.5), 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
  -moz-box-shadow: 0 15px 10px -10px rgba(0, 0, 0, 0.5), 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
  box-shadow: 0 15px 10px -10px rgba(0, 0, 0, 0.5), 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
}

.curved:before {
  top:10px;
  bottom:10px;
  left:0;
  right:50%;
  -webkit-box-shadow:0 0 15px rgba(0,0,0,0.6);
     -moz-box-shadow:0 0 15px rgba(0,0,0,0.6);
          box-shadow:0 0 15px rgba(0,0,0,0.6);
  -moz-border-radius:10px / 100px;
       border-radius:10px / 100px;
}
.curved-vt-2:before {
  right:0;
}
.curved-hz-1:before {
  top:50%;
  bottom:0;
  left:10px;
  right:10px;
  -moz-border-radius:100px / 10px;
       border-radius:100px / 10px;
}
.curved-hz-2:before {
  top:0;
  bottom:0;
  left:10px;
  right:10px;
  -moz-border-radius:100px / 10px;
       border-radius:100px / 10px;
}

.rotated {
  -webkit-box-shadow:none;
     -moz-box-shadow:none;
          box-shadow:none;
  -webkit-transform:rotate(-3deg);
     -moz-transform:rotate(-3deg);
      -ms-transform:rotate(-3deg);
       -o-transform:rotate(-3deg);
          transform:rotate(-3deg);
}
.rotated > :first-child:before {
  content:"";
  position:absolute;
  z-index:-1;
  top:0;
  bottom:0;
  left:0;
  right:0;
  background:#fff;
  -webkit-box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
     -moz-box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
          box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
}

Special Thanks