body{height:100%;background-color:#333;overflow:hidden}.game{overflow:hidden;position:absolute;top:50%;left:50%;width:360px;height:580px;margin:-290px 0 0 -180px;background-color:#DDD894}.main{position:relative;height:480px;background:url(../img/bg.jpg) center bottom no-repeat #4EC0CA}.ready{display:none;position:absolute;top:130px;left:50%;width:254px;height:230px;margin-left:-127px;background:url(../img/start.png) no-repeat center}.over{position:absolute;top:580px;width:360px;text-align:center}.over .panel{position:relative;width:310px;height:162px;margin:30px auto 0;background:url(../img/panel.png) no-repeat center;font-size:32px;color:#fff;font-weight:700}.over .panel span{position:absolute;top:44px;right:30px}.over .panel em{position:absolute;top:100px;right:30px;font-style:normal}.over .restart{display:inline-block;width:145px;height:93px;background:url(../img/play.png) no-repeat center}.score{position:absolute;z-index:2;top:50px;left:50%;color:#fff;font-size:54px;font-weight:700;transform:translateX(-50%)}.bird{position:absolute;width:44px;height:30px;background:url(../img/brid.gif) no-repeat}.bird.died{background-image:url(../img/brid.png)}.lawn{position:absolute;bottom:-30px;left:0;width:720px;height:30px;background:url(../img/lawn.jpg) repeat-x}.pillar{position:absolute;height:100%}.pillar .item{position:absolute;width:69px;height:100%}.pillar .item:nth-child(1){left:0}.pillar .item:nth-child(2){left:220px}.pillar .item-down,.pillar .item-up{position:absolute;width:100%;height:100px;background:url(../img/pillar.png) repeat-y center}.pillar .item-up{top:0}.pillar .item-up:after{position:absolute;bottom:0;content:"";width:100%;height:35px;background:url(../img/pillar-up.png) no-repeat}.pillar .item-down{bottom:0}.pillar .item-down:after{position:absolute;top:0;content:"";width:100%;height:35px;background:url(../img/pillar-down.png) no-repeat}