.wave{position:relative}.wave:before{content:"";display:block;position:absolute;border-radius:100% 50%;width:340px;height:80px;background-color:#00f;right:-5px;top:40px}.wave:after{content:"";display:block;position:absolute;border-radius:100% 50%;width:300px;height:70px;background-color:#00f;left:0;top:27px}.perspective{perspective:1000px}.backface-hidden{backface-visibility:hidden}.rotate-y-180{transform:rotateY(180deg)}