html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,font,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,textarea,input,select,label,button,optgroup,option,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,figcaption,figure,footer,header,hgroup,menu,nav,section,summary,time,mark,audio,video{border:0;outline:0;font-size:100%;vertical-align:baseline;background:transparent;margin:0;padding:0}

.filtro select{display:block;width:100%;height:100%;border:none;background:none;opacity:0;filter:alpha(opacity=0)}