html{font-size:62.5% /*~=10px*/}
body{min-width:320px; position: relative;}
@media only screen and (min-width: 401px){html{font-size: 78% !important;}}
@media only screen and (min-width:481px){html{font-size:94%!important}}
@media only screen and (min-width:561px){html{font-size:109%!important}}
@media only screen and (min-width:641px){html{font-size:125%!important} body{max-width:640px}}