.cloud{position:absolute}#fogContainer{display:block;position:fixed;left:0;top:0;overflow:hidden;z-index:-995;height:100%;width:100%}.cloud1{width:200px;height:200px}.webp .cloud1{background:url(/img/fog-texture200.webp)}.no-webp .cloud1{background:url(/img/fog-texture200.png)}.cloud2{width:300px;height:300px}.webp .cloud2{background:url(/img/fog-texture300.webp)}.no-webp .cloud2{background:url(/img/fog-texture300.png)}.cloud3{width:400px;height:400px}.webp .cloud3{background:url(/img/fog-texture400.webp)}.no-webp .cloud3{background:url(/img/fog-texture400.png)}