ADDTHIS PLUGIN CENTRE ALIGNMENT and responsive

#addthis{max-width:100% !important}
@media all and (max-width:480px){.at300b, .addthis_counter{clear:both !important}}

/* ADDTHIS PLUGIN CENTRE ALIGNMENT
----------------------------------------------- */
div.addthis_toolbox {
width:54%;
margin-left: 23%;
margin-right: 23%;
}