CSS Material design

.header.snap {
    box-shadow: 0 0.125rem 0.3125rem rgba(0,0,0,.26);
    position: fixed!important;
}

.css {
    padding: 32px;
    float: left;
    transition: box-shadow 0.15s cubic-bezier(.4,0,.2,1);
    margin: 0;
}


.css:hover{
    box-shadow: 0 3px 3px -2px rgba(0,0,0,.2),
                0 3px 4px 0 rgba(0,0,0,.14),
                0 1px 8px 0 rgba(0,0,0,.12);
}