@font-face {
    font-family: "Mona Sans";
    src: url("../fonts/Mona-Sans.woff2") format("woff2 supports variations"), url("../fonts/Mona-Sans.woff2") format("woff2-variations");
    font-weight: 100 1000;
}

@property --bg-1-x {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
}

@property --bg-2-x {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
}

@property --bg-2-y {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
}

@property --bg-3-x {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
}

@property --bg-3-y {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
}

:root {
    --bg-color: hsl(240deg 10% 12%);
    --bg-grain: url("data:image/svg+xml,%3Csvg viewBox='0 0 600 600' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    --shadow-size: max(140px, 40vw);
    --shadow-size-fallback: 40vw;
    --shadow-blur: 60;
    --color-1: #6328da;
    --color-2: #ff1bf1;
    --color-3: #008cea;
    --bg-1-x: 0;
    --bg-1-y: 0;
    --bg-2-x: 0;
    --bg-2-y: 0;
    --bg-3-x: 0;
    --bg-3-y: 0;
    --debug: 0;
}

@supports (color: color(display-p3 1 1 1)) {
    :root {
        --color-1: color(display-p3 0.36 0.17 0.82);
        --color-2: color(display-p3 0.95 0.04 0.95);
        --color-3: color(display-p3 0.01 0.53 0.99);
    }
}

@media (min-width: 960px) {
    :root {
        --shadow-size: max(72px, 25vw);
        --shadow-size-fallback: 25vw;
        --shadow-blur: 80;
    }
}

* {
    box-sizing: border-box;
    outline: calc(var(--debug) * 1px) dashed red;
}

*:before, *:after {
    outline: calc(var(--debug) * 1px) dashed red;
}

html, body {
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
}

body {
    font-family: "Mona Sans", sans-serif;
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    background: var(--bg-color);
    z-index: 1;
    position: relative;
}

body:before {
    content: "";
    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
    z-index: 1;
    background: radial-gradient(circle var(--shadow-size, var(--shadow-size-fallback)) at 20vw 0, var(--color-1, red) 100%, transparent 0), radial-gradient(circle var(--shadow-size, var(--shadow-size-fallback)) at 100vw 0, var(--color-2, red) 100%, transparent 0), radial-gradient(circle calc(var(--shadow-size, var(--shadow-size-fallback)) * 1.2) at 50vw 115vh, var(--color-3, red) 100%, transparent 0);
    top: 0;
    left: 0;
    opacity: 0.5;
    filter: blur(calc(var(--shadow-blur) * 1px));
    mix-blend-mode: hue;
}

body:after {
    content: "";
    display: block;
    width: 100%;
    height: 100%;
    position: absolute;
    z-index: -1;
    top: 0;
    left: 0;
    filter: contrast(145%) brightness(650%) invert(100%);
    mix-blend-mode: screen;
    background: var(--bg-grain);
    background-size: 500px;
}

main {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    display: grid;
    place-items: center;
    z-index: 2;
}

main h1 {
    color: white;
    font-size: max(72px, 15vw);
    mix-blend-mode: lighten;
    font-weight: 650;
    font-stretch: 110%;
    letter-spacing: -0.04em;
    background: var(--bg-grain), conic-gradient(from 140deg at calc(var(--bg-1-x) * 1%) 90%, #1a0d00, #00011a, #fffffa, #15009e, #d232aa, #fa8c3d, #fff480, #fffffa, #7ed4fb, #040d8b, #010014), radial-gradient(ellipse at calc(var(--bg-2-x) * 1%) calc(var(--bg-2-y) * 1%), white 12%, transparent 35%), radial-gradient(ellipse at calc(var(--bg-3-x) * 1%) calc(var(--bg-3-y) * 1%), #61a8fa, transparent 35%);
    background-repeat: repeat;
    background-size: 500px, cover;
    background-blend-mode: color-burn;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 1;
    animation: bg 20s linear infinite alternate;
}

@keyframes bg {
    0% {
        --bg-1-x: calc(50 / 2);
        --bg-2-y: calc(80 / 2);
        --bg-2-x: calc(70 / 2);
        --bg-3-y: calc(40 / 2);
        --bg-3-x: calc(90 / 2);
    }
    25% {
        --bg-1-x: 30;
        --bg-2-y: 50;
        --bg-2-x: 80;
        --bg-3-y: 20;
        --bg-3-x: 70;
    }
    50% {
        --bg-1-x: 10;
        --bg-2-y: 40;
        --bg-2-x: 30;
        --bg-3-y: 80;
        --bg-3-x: 50;
    }
    75% {
        --bg-1-x: 70;
        --bg-2-y: 10;
        --bg-2-x: 50;
        --bg-3-y: 30;
        --bg-3-x: 40;
    }
    100% {
        --bg-1-x: calc(50 / 2);
        --bg-2-y: calc(80 / 2);
        --bg-2-x: calc(70 / 2);
        --bg-3-y: calc(40 / 2);
        --bg-3-x: calc(90 / 2);
    }
}