ul.balls{padding:0;list-style-type:none;margin-top:-10px;display:block}
ul.balls li{float:left;}
fieldset{border-radius:4px;border:1px solid #ddd}
fieldset>legend{width:auto;font-size:1em}
.ball-result .red{background-color:#f00;color:white;border-radius:50px;padding:2px;position:relative;}
.ball-result .blue{background-color:#00f;color:white;border-radius:50px;padding:2px;position:relative;}
.ball-result .red.matched::before,
.ball-result .blue.matched::before{content:"✓";color:green;position:absolute;right:-7px;bottom:-7px}