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

*{

margin: 0;
padding: 0;
box-sizing: border-box;

font-family: 'Oswald', sans-serif ;
}

body{
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
background: #434750;

}
ul
{

position: relative;
transform: skewY(-15deg);

}

ul li 
{
position: relative;
list-style: none;
width: 120px;
background: #3e3f46;
padding: 15px;
transition: 0.5s;
z-index: calc(1 * var(--i)) ;


}

ul li:hover{
transform: translateX(-50px);
background: var(--clr);

}




 ul li::before
 {

content: '';
position: absolute;
top: 0;
left: -40px;
width: 40px;
height: 100%;
background: #3e3f46;
filter: brightness(0.7);
transform-origin: right;
transform: skewY(45deg);
transition: 0.5;



 }
ul li:hover::before
{
background: var(--clr);
filter: brightness(0.7);

}

ul li::after
{
content:'' ;
position:absolute ;
top: -40px;
left: 0;
width: 100%;
height: 40px;
background: #3e3f46;
filter: brightness(0.9);
transform-origin: bottom;
transform: skewX(45deg);
transition: 0.5s;


}

ul li:hover::after{
background: var(--clr);
filter: brightness(0.9);



}



ul li a{

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

ul li:hover a {

color: #fff;


}
ul li:last-child::after{

box-shadow: -120px 120px 20px rgba(0,0,0,0.25);


}

ul li span {

    position: absolute;
    top: 0;
    left: -40px;
    width: 40px;
    height: 100%;
  
    filter: brightness(0.7);
    transform-origin: right;
    transform: skewY(45deg);
    transition: 0.5;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0.5;
    font-size: 1.25em;

}
ul li:hover span{

opacity: 1;

}