:root {
    --pnl-ltr-width: 800px;
}
.pnl-ltr {
	transition: all 0.5s;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
	-ms-transition: all 0.5s;
	-o-transition: all 0.5s;
}

.pnl-ltr-colapsado {
	transition: all 0.5s;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
	-ms-transition: all 0.5s;
	-o-transition: all 0.5s;
	width: 0;
}

.pnl-ltr-expandido {
	transition: all 0.5s;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
	-ms-transition: all 0.5s;
	-o-transition: all 0.5s;
	width: var(--pnl-ltr-width)!important;
}

.pnl-grd {
	transition: all 0.5s;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
	-ms-transition: all 0.5s;
	-o-transition: all 0.5s;
}

.pnl-grd-colapsado {
	transition: all 0.5s;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
	-ms-transition: all 0.5s;
	-o-transition: all 0.5s;
	width: 100%;
}

.pnl-grd-expandido {
	transition: all 0.5s;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
	-ms-transition: all 0.5s;
	-o-transition: all 0.5s;
	width: calc( 100% - var(--pnl-ltr-width) )!important;
}