.boot-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    z-index: 20000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 1.5s ease-out, visibility 1.5s;
}

.boot-screen.hide-boot {
    opacity: 0;
    visibility: hidden;
}

.boot-logo,
.boot-disclaimer,
.boot-progress-container,
.boot-hint {
    display: none !important;
}

.loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.2);

    --from: 200px;
    --to: 40px;
    --size: 32px;
    --time: 6s;
    --count: 100;
    --turns: 6;
}

.circle {
    position: absolute;

    --delay: calc(var(--time) / var(--count) * -1 * var(--i));
    rotate: calc(var(--turns) * 1turn / var(--count) * var(--i));

    animation: circle var(--time) var(--delay) ease-in-out infinite;
}
.circle::before {
    content: "";
    display: block;
    width: var(--size);
    aspect-ratio: 1/1;
    border-radius: 50%;
    background-color: white;
    transform-origin: center center;

    animation: circleSize var(--time) var(--delay) ease-in-out infinite;
}

/* rainbow color using HSL */
.rainbow .circle::before {
    background-color: hsl(
        calc(1turn / (var(--count) / var(--turns)) * var(--i)) 100% 70%
    );
}

/* animations */
@keyframes circle {
    from {
        transform: translate(0, var(--from));
    }
    to {
        transform: translate(0, var(--to));
    }
}
@keyframes circleSize {
    0%,
    100% {
        transform: scale(0);
    }
    25%,
    50% {
        transform: scale(1);
    }
}