.fi{background-size:contain;background-position:50%;background-repeat:no-repeat;position:relative;display:inline-block;width:1.333333em;line-height:1em}
.fi:before{content:"\00a0"}
.fi-th{background-image:url('flags/th.svg')}
.fi-us{background-image:url('flags/us.svg')}
.fi-vn{background-image:url('flags/vn.svg')}