How to Create Directionally Lit 3D Buttons using CSS ?

/* styles.css */

* {
    margin: 0;
    padding: 0;
}

div {
    background: lightgreen;
    width: 100vw;
    height: 100vh;
    font-family: 'Segoe UI', Tahoma,
        Geneva, Verdana, sans-serif;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

ul {
    position: absolute;
    display: flex;
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
    color: rgba(0, 0, 0, 0.7);
}

i {
    padding: 10px;
}

ul li {
    list-style: none;
    margin: 10px;
    display: block;
}

ul li a {
    width: 200px;
    height: 50px;
    background: orangered;
    display: flex;
    font-size: 20px;
    align-items: center;
    justify-content: center;
    transform: rotate(-30deg) skewX(25deg);
    box-shadow: -20px 20px 8px rgba(0, 0, 0, 0.5);
}

ul li a:before {
    content: '';
    position: absolute;
    top: 10px;
    left: -20px;
    background: orangered;
    height: 100%;
    width: 20px;
    transform: rotate(0deg) skewY(-45deg);
}

ul li a:after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: -10px;
    background: orangered;
    height: 20px;
    width: 100%;
    transform: rotate(0deg) skewX(-45deg);
}

li a:hover {
    transform: rotate(-30deg) skew(25deg) translate(20px, -15px);
}