*{-webkit-box-sizing:border-box;box-sizing:border-box;outline:none}.game-title{display:block;margin-bottom:30px;font-size:35px;font-weight:bold;text-align:center}.game{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-box-pack:justify;-webkit-justify-content:space-between;-ms-flex-pack:justify;justify-content:space-between;-webkit-flex-wrap:wrap;-ms-flex-wrap:wrap;flex-wrap:wrap;width:152px;margin:0 auto 50px;border:1px solid #000}.game-item{position:relative;width:50px;height:50px;line-height:48px;border:1px solid #000;cursor:pointer;text-align:center;font-size:30px;font-weight:bold;-webkit-transition:all linear 0.3s;-o-transition:all linear 0.3s;transition:all linear 0.3s}.game-item:hover{background-color:#ccc}.game-item.o{background-color:#abfdab}.game-item.x{background-color:#f99}#reset-game{display:block;margin:0 auto;border:1px solid #000;border-radius:20px;background-color:#fff;padding:10px 20px;cursor:pointer;-webkit-transition:all linear 0.3s;-o-transition:all linear 0.3s;transition:all linear 0.3s}#reset-game:hover{background-color:#ccc}