/* Aurora CSS effect copied from https://codepen.io/ostylowany/pen/vYzPVZL */

@import url('https://fonts.googleapis.com/css2?family=Rubik+80s+Fade&display=swap');

:root {
    --bg: #000000;
    --clr-1: #00c2ff;
    --clr-2: #33ff8c;
    --clr-3: #ffc640;
    --clr-4: #e54cff;

    --blur: 1rem;
    --fs: clamp(5rem, 10vw, 10rem);
    --ls: clamp(-1.75px, -0.25vw, -3.5px);
}

body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    overflow: hidden;
    background-color: var(--bg);
    color: #fff;
    font-family: "Rubik 80s Fade", sans-serif;
}

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

#content {
    text-align: center;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

#savings {
    font-size: var(--fs);
    font-weight: 400;
    letter-spacing: var(--ls);
    position: relative;
    overflow: hidden;
    background: var(--bg);
    margin: 0;
    cursor: pointer;
    border: 5px solid black;
}

.aurora {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    mix-blend-mode: darken;
    pointer-events: none;
}

.aurora__item {
    overflow: hidden;
    position: absolute;
    width: 60vw;
    height: 60vw;
    background-color: var(--clr-1);
    border-radius: 37% 29% 27% 27% / 28% 25% 41% 37%;
    filter: blur(var(--blur));
    mix-blend-mode: overlay;
}

.aurora__item:nth-of-type(1) {
    top: -50%;
    animation: aurora-border 6s ease-in-out infinite,
        aurora-1 12s ease-in-out infinite alternate;
}

.aurora__item:nth-of-type(2) {
    background-color: var(--clr-3);
    right: 0;
    top: 0;
    animation: aurora-border 6s ease-in-out infinite,
        aurora-2 12s ease-in-out infinite alternate;
}

.aurora__item:nth-of-type(3) {
    background-color: var(--clr-2);
    left: 0;
    bottom: 0;
    animation: aurora-border 6s ease-in-out infinite,
        aurora-3 8s ease-in-out infinite alternate;
}

.aurora__item:nth-of-type(4) {
    background-color: var(--clr-4);
    right: 0;
    bottom: -50%;
    animation: aurora-border 6s ease-in-out infinite,
        aurora-4 24s ease-in-out infinite alternate;
}

@keyframes aurora-1 {
    0% {
        top: 0;
        right: 0;
    }

    50% {
        top: 100%;
        right: 75%;
    }

    75% {
        top: 100%;
        right: 25%;
    }

    100% {
        top: 0;
        right: 0;
    }
}

@keyframes aurora-2 {
    0% {
        top: -50%;
        left: 0%;
    }

    60% {
        top: 100%;
        left: 75%;
    }

    85% {
        top: 100%;
        left: 25%;
    }

    100% {
        top: -50%;
        left: 0%;
    }
}

@keyframes aurora-3 {
    0% {
        bottom: 0;
        left: 0;
    }

    40% {
        bottom: 100%;
        left: 75%;
    }

    65% {
        bottom: 40%;
        left: 50%;
    }

    100% {
        bottom: 0;
        left: 0;
    }
}

@keyframes aurora-4 {
    0% {
        bottom: -50%;
        right: 0;
    }

    50% {
        bottom: 0%;
        right: 40%;
    }

    90% {
        bottom: 50%;
        right: 25%;
    }

    100% {
        bottom: -50%;
        right: 0;
    }
}

@keyframes aurora-border {
    0% {
        border-radius: 37% 29% 27% 27% / 28% 25% 41% 37%;
    }

    25% {
        border-radius: 47% 29% 39% 49% / 61% 19% 66% 26%;
    }

    50% {
        border-radius: 57% 23% 47% 72% / 63% 17% 66% 33%;
    }

    75% {
        border-radius: 28% 49% 29% 100% / 93% 20% 64% 25%;
    }

    100% {
        border-radius: 37% 29% 27% 27% / 28% 25% 41% 37%;
    }
}