.img-wrapper{
    padding: 5px;
    float: left;
    background: #ddd;
    border: 1px solid rgba(30,140,190,.8);
    margin: 5px;
}
.wd-12{
    width: 100%;
    float: left;
}
.wd-3{
    width:33%;
    float: left;
}
.pull-center{
    text-align: center;
}
.pull-left{
    text-align: left;
}
.pull-right{
    text-align: right;
}