* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #060c21;
    font-family: Arial, 
        Helvetica, sans-serif;
    gap: 2em;
}
a {
    background-color: #ffffff2c;
    color: #fff;
    padding: 15px 30px;
    position: relative;
    text-decoration: none;
    letter-spacing: 1px;
    font-size: 1.5em;
    text-transform: uppercase;
    transition: 0.5s;
}
a:hover {
    letter-spacing: 3px;
    background-color: var(--clr);
    color: var(--clr);
    box-shadow: 0 0 40px var(--clr);
}
a::before {
    content: '';
    position: absolute;
    inset: 2px;
    background-color: #060c21;
}
a span {
    position: relative;
    z-index: 1;
}
a i {
    position: absolute;
    inset: 0;
    display: block;
}
a i::before {
    content: '';
    position: absolute;
    border: 2px solid var(--clr);
    width: 10px;
    height: 10px;
    border-radius: 50%;
    left: 80%;
    top: -6px;
    background-color: #060c21;
    transform: translateX(-50%);
    transition: 0.5s;
}
a:hover i::before {
    width: 15px;
    height: 15px;
    top: -9px;
    left: 20%;
}
a i::after {
    content: '';
    position: absolute;
    border: 2px solid var(--clr);
    width: 10px;
    height: 10px;
    border-radius: 50%;
    left: 20%;
    bottom: -6px;
    background-color: #060c21;
    transform: translateX(-50%);
    transition: 0.5s;
}
a:hover i::after {
    width: 15px;
    height: 15px;
    bottom: -9px;
    left: 80%;
}