*{box-sizing:border-box}html,body{margin:0}body{-webkit-text-size-adjust:100%}input,select,textarea{font-size:16px}button{min-height:40px;cursor:pointer}.scroll-x{overflow-x:auto;-webkit-overflow-scrolling:touch}@media(max-width:640px){button{min-height:44px;padding:8px 14px}}