@property --color {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 10%;
}

@font-face {
    font-family: grunge;
    src: url("BROMPH_TOWN.ttf");
}

.grunge {
    font-family: grunge;
    font-size: 5vh;
    color: #e4e0e8;
}

@property --tone {
    syntax: '<number>';
    inherits: false;
    initial-value: 0;
}

:root {
    --bg: #111;
    --size: 8;
    --speed: 2;
    --hue: 0;
    --tone: 0;
}

* {
    transform-style: preserve-3d;
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 250vmin;
    background: var(--bg);
}


/*
body:after {
	content: "";
	position: absolute;
	background: 
		linear-gradient(37.5deg, var(--bg) 28%, #fff0 35%), 
		linear-gradient(-37.5deg, var(--bg) 28%, #fff0 35%);
	width: 100%;
	height: 100%;
	opacity: 0.75;
}
*/

.content {
    width: calc(var(--size) * 6vmin);
    height: calc(var(--size) * 6vmin);
    transform: rotateX(45deg) rotateZ(45deg);
}

.cuboid {
    --height: var(--size);
    --width: var(--size);
    --depth: calc(var(--size) * 5);
    --delay: calc(calc(var(--speed) / 16) * 1s);
    --sat: var(--color, 50%);
    --hue: var(--tone, 0);
    --win: calc(calc(var(--size) / 6) * 1vmin);
    height: calc(var(--height) * 1vmin);
    width: calc(var(--width) * 1vmin);
    position: absolute;
    transform: translate3d(0vmin, 0vmin, 0vmin);
    animation: grow calc(var(--speed) * 1s) ease 0s infinite, colors calc(var(--speed) * 2.25s) linear 0s infinite;
    transition: --color calc(var(--speed) * 1s) 0s, --tone calc(var(--speed) * 2, 25s) 0s;
}

.cuboid .side {
    position: absolute;
    top: 50%;
    left: 50%;
    height: 100%;
    width: 100%;
    border-radius: 2px;
}

.cuboid .side:nth-of-type(1) {
    transform: translate3d(-50%, -50%, calc(var(--depth) * 0.5vmin));
    background: linear-gradient(-125deg, #fff8, #fff0), hsl(var(--hue), var(--sat), 55%);
    border: calc(calc(var(--size) / 12) * 1vmin) solid #fff0;
    border-color: #6e6e6e #958d9b #999999 #b3b3b3;
}

.cuboid .side:nth-of-type(2) {
    transform: translate3d(-50%, -50%, calc(var(--depth) * -0.5vmin)) rotateY(180deg);
    background: hsl(var(--hue), var(--sat), 25%);
    display: none;
}

.cuboid .side:nth-of-type(3) {
    width: calc(var(--depth) * 1vmin);
    transform: translate(-50%, -50%) rotateY(90deg) translate3d(0, 0, calc(var(--width) * 0.5vmin));
    background: linear-gradient(135deg, #fff6, #fff0 50%), linear-gradient(90deg, #fff0, var(--bg) 100%), repeating-conic-gradient(from 0deg at var(--win) calc(var(--win) * 1.5), #808e93, #bbbab0 25%, #fff0 0 100%), hsl(var(--hue), var(--sat), 40%);
    background-repeat: no-repeat, no-repeat, repeat, no-repeat;
    background-size: 100% 100%, 100% 100%, calc(calc(var(--size) / 2) * 1.35vmin) calc(calc(var(--size) / 3.2) * 1vmin), 100% 100%;
    background-position: 0 0, 0 0, 0 calc(calc(var(--size) / 15) * 1vmin), 0 0;
}

.cuboid .side:nth-of-type(4) {
    width: calc(var(--depth) * 1vmin);
    transform: translate(-50%, -50%) rotateY(-90deg) translate3d(0, 0, calc(var(--width) * 0.5vmin));
    background: linear-gradient(-90deg, hsl(var(--hue), var(--sat), 40%) 20%, var(--bg) 100%);
}

.cuboid .side:nth-of-type(5) {
    height: calc(var(--depth) * 1vmin);
    transform: translate(-50%, -50%) rotateX(90deg) translate3d(0, 0, calc(var(--height) * 0.5vmin));
    background: linear-gradient(45deg, hsl(var(--hue), var(--sat), 20%) 20%, var(--bg) 100%);
}

.cuboid .side:nth-of-type(6) {
    height: calc(var(--depth) * 1vmin);
    transform: translate(-50%, -50%) rotateX(-90deg) translate3d(0, 0, calc(var(--height) * 0.5vmin));
    background: linear-gradient(180deg, #fff0, var(--bg) 100%), repeating-conic-gradient(from 0deg at calc(var(--win) * 0.5) calc(var(--win) * 2.75), #43484a, #706f68 25%, #fff0 0 100%), hsl(var(--hue), var(--sat), 20%);
    background-repeat: no-repeat, repeat, no-repeat;
    background-size: 100% 100%, calc(calc(var(--size) / 3.2) * 1vmin) calc(calc(var(--size) / 2) * 1.35vmin), 100% 100%;
    background-position: 0 0, calc(calc(var(--size) / 1.065) * 1vmin) calc(calc(var(--size) / 7) * 1vmin), 0 0;
}

.cuboid .side:nth-of-type(1):before {
    content: " ";
    position: absolute;
    width: 80%;
    height: 80%;
    left: 10%;
    top: 10%;
    box-sizing: border-box;
    background: linear-gradient(45deg, #95899e 0 5%, #fff0 0 95%, #c3bcc8 0 100%), conic-gradient( from -90deg at 90% 90%, #7d8b91, #c1beb3 25%, #948c99 0 62.5%, #545157 0 100%);
}

.cuboid:nth-child(2) {
    left: calc(calc(var(--size) / 4) * 5vmin);
    animation-delay: calc(var(--delay) * -15);
}

.cuboid:nth-child(3) {
    left: calc(calc(var(--size) / 4) * 10vmin);
    animation-delay: calc(var(--delay) * -14);
}

.cuboid:nth-child(4) {
    left: calc(calc(var(--size) / 4) * 15vmin);
    animation-delay: calc(var(--delay) * -13);
}

.cuboid:nth-child(5) {
    left: calc(calc(var(--size) / 4) * 20vmin);
    animation-delay: calc(var(--delay) * -12);
}

.cuboid:nth-child(6) {
    left: calc(calc(var(--size) / 4) * 20vmin);
    top: calc(calc(var(--size) / 4) * 5vmin);
    animation-delay: calc(var(--delay) * -11);
}

.cuboid:nth-child(7) {
    left: calc(calc(var(--size) / 4) * 20vmin);
    top: calc(calc(var(--size) / 4) * 10vmin);
    animation-delay: calc(var(--delay) * -10);
}

.cuboid:nth-child(8) {
    left: calc(calc(var(--size) / 4) * 20vmin);
    top: calc(calc(var(--size) / 4) * 15vmin);
    animation-delay: calc(var(--delay) * -9);
}

.cuboid:nth-child(9) {
    left: calc(calc(var(--size) / 4) * 20vmin);
    top: calc(calc(var(--size) / 4) * 20vmin);
    animation-delay: calc(var(--delay) * -8);
}

.cuboid:nth-child(10) {
    top: calc(calc(var(--size) / 4) * 20vmin);
    left: calc(calc(var(--size) / 4) * 15vmin);
    animation-delay: calc(var(--delay) * -7);
}

.cuboid:nth-child(11) {
    top: calc(calc(var(--size) / 4) * 20vmin);
    left: calc(calc(var(--size) / 4) * 10vmin);
    animation-delay: calc(var(--delay) * -6);
}

.cuboid:nth-child(12) {
    top: calc(calc(var(--size) / 4) * 20vmin);
    left: calc(calc(var(--size) / 4) * 5vmin);
    animation-delay: calc(var(--delay) * -5);
}

.cuboid:nth-child(13) {
    top: calc(calc(var(--size) / 4) * 20vmin);
    left: 0;
    animation-delay: calc(var(--delay) * -4);
}

.cuboid:nth-child(14) {
    top: calc(calc(var(--size) / 4) * 15vmin);
    animation-delay: calc(var(--delay) * -3);
}

.cuboid:nth-child(15) {
    top: calc(calc(var(--size) / 4) * 10vmin);
    animation-delay: calc(var(--delay) * -2);
}

.cuboid:nth-child(16) {
    top: calc(calc(var(--size) / 4) * 5vmin);
    animation-delay: calc(var(--delay) * -1);
}

@keyframes grow {
    0% {
        --color: 60%;
        transform: translateZ(calc(var(--size) * 1vmin));
    }
    90% {
        --color: 10%;
        transform: translateZ(calc(var(--size) * -2vmin));
    }
    100% {
        --color: 60%;
        transform: translateZ(calc(var(--size) * 1vmin));
    }
}

@keyframes colors {
    0% {
        --tone: 360;
    }
    100% {
        --tone: 0;
    }
}