html {  font-size: 16px; }
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin:0; padding:0; position: relative; }
ul,ol,li,p,h1,h2,h3,h4,h5,h6 {margin: 0;}
button, input { border:none; background:transparent;}
button {cursor:pointer;}
button:focus,input:focus {outline: transparent;}
a, button{box-sizing: border-box;}