.custom-drop-shadow {
    -webkit-box-shadow: 0 0 10px 15px rgba(0,0,0,0.4);
    -moz-box-shadow: 0 0 10px 15px rgba(0,0,0,0.4);
    box-shadow: 0 0 10px 15px rgba(0,0,0,0.4);
}