glitch-countdown/dist/main.css

@font-face {
    font-family: "SourceCodePro";
    src: url('fonts/SourceCodePro-VariableFont_wght.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

* {
    font-family: "SourceCodePro", sans-serif;
}

body {
    background-color: black;
}

#countdown {
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 85vw;
    height: 30vw;
}

#countdown .part {
    display: inline-block;
    position: relative;
    padding-top: 3vw;
}

#countdown * {
    font-size: 9vw;
    color: white;
}

#countdown .separator {
    font-size: 12vw;
}

#countdown.blink .separator {
    opacity: 0;
}

#countdown input {
    width: 11.2vw;
    text-align: center;
    height: 9.6vw;
    background: transparent;
    border: solid;
    font-variant-numeric: tabular-nums;
}

#countdown #days input {
    width: 17vw;
}

#countdown button {
    position: relative;
    display: block;
    background-color: #222;
    color: white;
    margin-top: 4.5vw;
    width: 100%;
    border-radius: 0.45vw;
    border: solid 1px grey;
    transition: background-color 0.2s, border 0.2s;
}

#countdown button:hover {
    background-color: black;
    border: 1px white solid;
    text-shadow: 0.05em 0 0 #00fffc, -0.03em -0.04em 0 #fc00ff,
    0.025em 0.04em 0 #fffc00;
    animation: glitch 725ms infinite;
}

#countdown button .layer {
    width: 100%;
    text-align: center;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
}

#countdown button:hover .layer {
    display: inline;
}

#countdown button .layer:first-of-type {
    animation: glitch 500ms infinite;
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
    transform: translate(-0.04em, -0.03em);
    opacity: 0.75;
}
  
#countdown button .layer:last-of-type {
    animation: glitch 375ms infinite;
    clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
    transform: translate(0.04em, 0.03em);
    opacity: 0.75;
}

#countdown input:disabled {
    background: transparent;
}

#countdown .up, #countdown .down {
    position: absolute;
    line-height: 9vw;
    width: 3.5vw;
    text-align: center;
    left: calc(50% - 1.5vw);
    transform: rotate(90deg);
    cursor: pointer;
}

#countdown .up {
    top: calc(-2.5vw - 0.6vw);
}

#countdown .down {
    top: calc(10vw + 0.6vw);
}

#countdown.counting .up, #countdown.counting .down {
    display: none;
}


@keyframes glitch {
    0% {
      text-shadow: 0.05em 0 0 #00fffc, -0.03em -0.04em 0 #fc00ff,
        0.025em 0.04em 0 #fffc00;
    }
    15% {
      text-shadow: 0.05em 0 0 #00fffc, -0.03em -0.04em 0 #fc00ff,
        0.025em 0.04em 0 #fffc00;
    }
    16% {
      text-shadow: -0.05em -0.025em 0 #00fffc, 0.025em 0.035em 0 #fc00ff,
        -0.05em -0.05em 0 #fffc00;
    }
    49% {
      text-shadow: -0.05em -0.025em 0 #00fffc, 0.025em 0.035em 0 #fc00ff,
        -0.05em -0.05em 0 #fffc00;
    }
    50% {
      text-shadow: 0.05em 0.035em 0 #00fffc, 0.03em 0 0 #fc00ff,
        0 -0.04em 0 #fffc00;
    }
    99% {
      text-shadow: 0.05em 0.035em 0 #00fffc, 0.03em 0 0 #fc00ff,
        0 -0.04em 0 #fffc00;
    }
    100% {
      text-shadow: -0.05em 0 0 #00fffc, -0.025em -0.04em 0 #fc00ff,
        -0.04em -0.025em 0 #fffc00;
    }
  }