@import url("https://use.fontawesome.com/releases/v6.5.1/css/all.css");

:root {
    --bg: #222;
    --clr: #fff;
}

body {
    background: var(--bg);
    height: 100vh;
    gap: 50px;
    overflow: hidden;
}

header {
    top: 0px;
    width: 100%;
    height: 30px;
}

body {
    position: relative;
    display: flex;
    gap: 50px;
    justify-content: center;
    align-items: center;
}

li {
    position: relative;
    list-style: none;
    width: 80px;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: 0.5s;
}

li::before {
    content: '';
    position: absolute;
    inset: 30px;
    box-shadow: 
        0 0 0 10px var(--clr),
        0 0 0 20px var(--bg),
        0 0 0 22px var(--clr);
    transition: 0.5s;
}

li::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--bg);
    transform: rotate(45deg);
    transition: 0.5s;
}

li:hover::before {
    inset: 15px;
}

li:hover::after {
    inset: 0px;
    transform: rotate(0deg);
}

li:hover a i {
    color: var(--clr);
    transform: translateY(-40%);
}

a {
    position: relative;
    z-index: 10;
    text-decoration: none;
    display: flex;
    justify-content: center;
    align-items: center;
}

a i {
    opacity: 1;
    color: var(--clr);
    font-size: 2em;
    transition: 0.5s;
}

a span {
    position: absolute;
    color: var(--clr);
    font-family: sans-serif;
    transition: 0.5s;
    transform: scale(0) translateY(200%);
    opacity: 0;
}

li:hover a span {
    opacity: 1;
    transform: scale(1) translateY(100%);
}

li:hover a i,
li a span {
    filter: 
    drop-shadow(0 0 20px var(--clr))
    drop-shadow(0 0 40px var(--clr))
    drop-shadow(0 0 60px var(--clr));
}

.title {
    position: absolute;
    color: var(--clr);
    font-family: sans-serif;
    bottom: 500px;
}