Hello readers !

This blog show how you can use shadow effect using css3.

CSS :-

body {
    background: #F2F2F2;
    color: #999;
    padding: 0;
    margin: 0;
}
.container {
    width: 820px;
    margin: 10px auto;
    padding: 25px;
    min-height: 400px;
    height: auto;
}
.box h3 {
    text-align: center;
    position: relative;
    top: 40px;
    font-size: 26px;
    font-family: "Trebuchet MS", Arial, Helvetica, sans-serif
}
.box {
    width: 70%;
    height: 100px;
    background: #FFF;
    margin: 40px auto;
}
/*** Effect 1 ***/
.effect1 {
    -webkit-box-shadow: 0 10px 6px -6px #777;
    -moz-box-shadow: 0 10px 6px -6px #777;
    box-shadow: 0 10px 6px -6px #777;
}
.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;
}
/*** Effect 3 ***/
.effect3 {
    position: relative;
}
.effect3:before {
    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);
}
/*** Effect 4 ***/
.effect4 {
    position: relative;
}
.effect4:after {
    z-index: -1;
    position: absolute;
    content: "";
    bottom: 15px;
    right: 10px;
    left: auto;
    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);
}
/*** Effect 5 ***/
.effect5 {
    position: relative;
}
.effect5:before, .effect5:after {
    z-index: -1;
    position: absolute;
    content: "";
    bottom: 25px;
    left: 10px;
    width: 50%;
    top: 80%;
    max-width: 300px;
    background: #777;
    -webkit-box-shadow: 0 35px 20px #777;
    -moz-box-shadow: 0 35px 20px #777;
    box-shadow: 0 35px 20px #777;
    -webkit-transform: rotate(-8deg);
    -moz-transform: rotate(-8deg);
    -o-transform: rotate(-8deg);
    -ms-transform: rotate(-8deg);
    transform: rotate(-8deg);
}
.effect5:after {
    -webkit-transform: rotate(8deg);
    -moz-transform: rotate(8deg);
    -o-transform: rotate(8deg);
    -ms-transform: rotate(8deg);
    transform: rotate(8deg);
    right: 10px;
    left: auto;
}
/*** Effect 6 ***/
.effect6 {
    position: relative;
    -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;
}
.effect6:before, .effect6:after {
    content: "";
    position: absolute;
    z-index: -1;
    -webkit-box-shadow: 0 0 20px rgba(0,0,0,0.8);
    -moz-box-shadow: 0 0 20px rgba(0,0,0,0.8);
    box-shadow: 0 0 20px rgba(0,0,0,0.8);
    top: 50%;
    bottom: 0;
    left: 10px;
    right: 10px;
    -moz-border-radius: 100px / 10px;
    border-radius: 100px / 10px;
}
.effect6: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);
}
/*** Effect 7 ***/
.effect7 {
    position: relative;
    -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;
}
.effect7:before, .effect7:after {
    content: "";
    position: absolute;
    z-index: -1;
    -webkit-box-shadow: 0 0 20px rgba(0,0,0,0.8);
    -moz-box-shadow: 0 0 20px rgba(0,0,0,0.8);
    box-shadow: 0 0 20px rgba(0,0,0,0.8);
    top: 0;
    bottom: 0;
    left: 10px;
    right: 10px;
    -moz-border-radius: 100px / 10px;
    border-radius: 100px / 10px;
}
.effect7: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);
}
/*** Effect 8 ***/
.effect8 {
    position: relative;
    -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;
}
.effect8:before, .effect8:after {
    content: "";
    position: absolute;
    z-index: -1;
    -webkit-box-shadow: 0 0 20px rgba(0,0,0,0.8);
    -moz-box-shadow: 0 0 20px rgba(0,0,0,0.8);
    box-shadow: 0 0 20px rgba(0,0,0,0.8);
    top: 10px;
    bottom: 10px;
    left: 0;
    right: 0;
    -moz-border-radius: 100px / 10px;
    border-radius: 100px / 10px;
}
.effect8: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);
}

HTML :-

<section class="container">
  <div class="box effect1">
    <h3>Shadow 1</h3>
  </div>
  <div class="box effect2">
    <h3>Shadow 2</h3>
  </div>
  <div class="box effect3">
    <h3>Shadow 3</h3>
  </div>
  <div class="box effect4">
    <h3>Shadow 4</h3>
  </div>
  <div class="box effect5">
    <h3>Shadow 5</h3>
  </div>
  <div class="box effect6">
    <h3>Shadow 6</h3>
  </div>
  <div class="box effect7">
    <h3>Shadow 7</h3>
  </div>
  <div class="box effect8">
    <h3>Shadow 8</h3>
  </div>
</section>