html,body,div,p,b,i,span,dl,dd,dt,ul,ol,li,header,footer,aside,nav,section,img,table,tr,td,tbody,tfoot,thead,th,h1,h2,h3,h4,h5,select,input,button{
margin:0;
padding:0;
box-sizing: border-box;
}
ul,ol{list-style: none;}
img{display: block;}
input{display: block;border:none;}