Soothing Clouds in CSS3

                                          HTML - 
 CSS - body {
    background: #ccc;
}
#cloud {
    width: 350px;
    height: 120px;
     	background: #f2f9fe;
    background: linear-gradient(top, #f2f9fe 5%, #d6f0fd 100%);
    background: -webkit-linear-gradient(top, #f2f9fe 5%, #d6f0fd 100%);
    background: -moz-linear-gradient(top, #f2f9fe 5%, #d6f0fd 100%);
    background: -ms-linear-gradient(top, #f2f9fe 5%, #d6f0fd 100%);
    background: -o-linear-gradient(top, #f2f9fe 5%, #d6f0fd 100%);
     	border-radius: 100px;
    -webkit-border-radius: 100px;
    -moz-border-radius: 100px;
     	position: relative;
    margin: 120px auto 20px;
}
 #cloud:after, #cloud:before {
    content: '';
    position: absolute;
    background: #f2f9fe;
    z-index: -1;
}
 #cloud:after {
    width: 100px;
    height: 100px;
    top: -50px;
    left: 50px;
     	border-radius: 100px;
    -webkit-border-radius: 100px;
    -moz-border-radius: 100px;
}
 #cloud:before {
    width: 180px;
    height: 180px;
    top: -90px;
    right: 50px;
     	border-radius: 200px;
    -webkit-border-radius: 200px;
    -moz-border-radius: 200px;
}
 .shadow {
    width: 350px;
    position: absolute;
    bottom: -10px;
    background: #000;
    z-index: -1;
     	box-shadow: 0 0 25px 8px rgba(0, 0, 0, 0.4);
    -moz-box-shadow: 0 0 25px 8px rgba(0, 0, 0, 0.4);
    -webkit-box-shadow: 0 0 25px 8px rgba(0, 0, 0, 0.4);
     	border-radius: 50%;
    -moz-border-radius: 50%;
    -webkit-border-radius: 50%;
}