#body { max-width: 1450px; margin: auto; }
#body:before, #body:after { content:""; width:calc((100% - 1448px) / 2); height:100%; background-size:cover !important; position:fixed; top:0; background: #555; z-index: 9999999; }
#body:before { left:0; background-position:left; }
#body:after { right:0; background-position:right; }

/* Backgrounds */

body.background-sky #body:before, body.background-sky #body:after { background-image:url(../images/background-sky.jpg); }
body.background-sky2 #body:before, body.background-sky2 #body:after { background-image:url(../images/background-sky2.jpg); }
body.background-sky3 #body:before, body.background-sky3 #body:after { background-image:url(../images/background-sky3.jpg); }
body.background-beach #body:before, body.background-beach #body:after { background-image:url(../images/background-beach.jpg); }
body.background-beach2 #body:before, body.background-beach2 #body:after { background-image:url(../images/background-beach2.jpg); }
body.background-beach3 #body:before, body.background-beach3 #body:after { background-image:url(../images/background-beach3.jpg); }
body.background-beach4 #body:before, body.background-beach4 #body:after { background-image:url(../images/background-beach4.jpg); }
body.background-forest #body:before, body.background-forest #body:after { background-image:url(../images/background-forest.jpg); }
body.background-forest2 #body:before, body.background-forest2 #body:after { background-image:url(../images/background-forest2.jpg); }
body.background-forest3 #body:before, body.background-forest3 #body:after { background-image:url(../images/background-forest3.jpg); }
body.background-forest4 #body:before, body.background-forest4 #body:after { background-image:url(../images/background-forest4.jpg); }
body.background-forest5 #body:before, body.background-forest5 #body:after { background-image:url(../images/background-forest5.jpg); }
body.background-sunset #body:before, body.background-sunset #body:after { background-image:url(../images/background-sunset.jpg); }
body.background-sunset2 #body:before, body.background-sunset2 #body:after { background-image:url(../images/background-sunset2.jpg); }
body.background-rose #body:before, body.background-rose #body:after { background-image:url(../images/background-rose.jpg); }
body.background-sheets #body:before, body.background-sheets #body:after { background-image:url(../images/background-sheets.jpg); }
body.background-water #body:before, body.background-water #body:after { background-image:url(../images/background-water.jpg); }
body.background-waterfall #body:before, body.background-waterfall #body:after { background-image:url(../images/background-waterfall.jpg); }
body.background-shells #body:before, body.background-shells #body:after { background-image:url(../images/background-shells.jpg); }
body.background-jelly #body:before, body.background-jelly #body:after { background-image:url(../images/background-jelly.jpg); }

@media (max-width:1366px) {
#body:before, #body:after { display: none; }
}