@import url('https://fonts.googleapis.com/css2?family=Balsamiq+Sans&display=swap');
:root {
    --clr-neon: #14f7ff;
    --clr-bg: #001414;
    --font-size: 3rem;
}

*,
*::after,
*::before {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: var(--clr-bg);
    color: var(--clr-neon);
    font-family: "Balsamiq Sans";
    overflow: hidden;
}

.glow {
    margin-top: -150px;
    font-size: var(--font-size);
    display: inline-block;
    position: relative;
    cursor: pointer;
    border: var(--clr-neon) 0.125em solid;
    padding: 0.25em 1em;
    border-radius: 0.25em;
    text-shadow: 0 0 .20em #FFF7, 0 0 .30em var(--clr-neon);
    box-shadow: inset 0 0 .5em var(--clr-neon), 0 0 .5em var(--clr-neon);
}

.glow::before {
    content: "";
    position: absolute;
    top: 140%;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--clr-neon);
    transform: perspective(0.2em) rotateX(10deg) scale(1.3, 0.40);
    filter: blur(0.5em);
    opacity: 0.6;
    pointer-events: none;
    transition: opacity 100ms linear;
}

.glow::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--clr-neon);
    box-shadow: 0 0 2em var(--clr-neon);
    z-index: -1;
    opacity: 0;
    transition: opacity 100ms linear;
}

.glow:hover::after {
    opacity: 1;
}

.glow:hover,
.glow:focus {
    color: white;
}

.glow:hover::before {
    opacity: 0.8;
}