@import url("https://fonts.googleapis.com/css?family=Oswald:400,700");

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    box-sizing:border-box;
    font-family: "Oswald",sans-serif;
    min-height: 100vh;
}

.centrado{
    display: flex;
    justify-content: center;

}
.ul3d{
    position:relative;
    transform: skewY(-15deg);

}

.ul3d li{
    position:relative;
    list-style:none;
    width: 350px;
    background: #3e3f46;
    padding: 15px;
    z-index: var(--i);
    transition: 0.5s;
    
}

.ul3d li:hover{
    background: #33a3ee;
    transform: translateX(-50px);
}

.ul3d li::before{
    content: "";
    position: absolute;
    top: 0;
    left: -40px;
    width: 40px;
    height: 100%;
    background: #2e3113;
    transform-origin: right;
    transform: skewY(45deg);
    transition: 0.5s;
}

.ul3d li:hover::before{
    background: #1f5378;
}

.ul3d li::after{
    content: "";
    position: absolute;
    top: -40px;
    left: 0;
    width: 100%;
    height: 40px;
    background: #35383e;
    transform-origin: bottom;
    transform: skewX(45deg);
    transition: 0.5s;
}

.ul3d li:hover::after{
    background: #2982b9;
}

.ul3d li a{
    text-decoration: none;
    color: #999;
    display: block;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: 0.5s;
}

.ul3d li:hover a{
    color: #fff;
}

.ul3d li:Last-child::after{
    box-shadow: -100px 100px 20px rgba(0,0,0,0.25);
}

.fondo{
	top:0;
	left:0;
	margin:0;
	width:100%;
	height:100%;
	position:absolute;
	opacity:.8;
}

.menu{
	position:relative;
}

.card-sombra {
    box-shadow: 30px 50px 90px 30px rgba(0,0,0,.8), 0 6px 20px 0 rgba(0,0,0,.1);
    /*transition: all .55s ease-in-out;*/
}