#app,body,html{width:100%;height:100%}body,div,h1,h2,h3,h4,h5,html,li,p,span,ul{box-sizing:border-box;padding:0;margin:0}li{list-style-type:none}input{box-sizing:border-box;margin:0;padding:0}button,input{border:none;outline:none}