*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;width:100%}body{min-width:320px;font-family:Arial,Helvetica,sans-serif;font-size:16px;color:#000}h1,h2,h3,h4,h5,h6,p{padding:0;margin:0;line-height:1.5}ul,ol{list-style:none;margin:0;padding:0}button{cursor:pointer}