/* Set the background color to black */
body {
    background-color: #000;
}

/* Create the black hole */
.black-hole {
    /* Set the width and height to 200px to create a circular shape */
    width: 200px;
    height: 200px;
    /* Set the border radius to 50% to create a circular shape */
    border-radius: 50%;
    /* Use a radial gradient to create a sense of depth and darkness */
    background: radial-gradient(ellipse at center, #000 0%, #111 50%, #222 100%);
    /* Add some texture and depth using box-shadow */
    box-shadow: inset 0 0 50px #111, 0 0 50px #111;
    /* Rotate the black hole using an animation */
    animation: rotate 10s linear infinite;
    /* Add a glow effect using box-shadow and a radial gradient */
    box-shadow: 0 0 20px 10px #8a2be2, inset 0 0 50px #111, 0 0 50px #111;
    background: radial-gradient(ellipse at center, #000 0%, #111 50%, #222 100%, #8a2be2 150%);
    /* Add another animation to make the glow effect pulse */
    animation: pulse 5s ease-in-out infinite;
    /* Add a transform to scale the black hole on hover */
    transition: transform 0.3s ease-in-out;
}

/* Define the animation to rotate the black hole */
@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* Define the animation to pulse the glow effect */
@keyframes pulse {
    0% {
        opacity: 0.3;
        box-shadow: 0 0 20px 10px red, inset 0 0 50px #111, 0 0 50px #111;
    }

    50% {
        opacity: 0.7;
        box-shadow: 0 0 40px 20px red, inset 0 0 50px #111, 0 0 50px #111;
    }

    100% {
        opacity: 0.3;
        box-shadow: 0 0 20px 10px red, inset 0 0 50px #111, 0 0 50px #111;
    }
}

/* Scale the black hole on hover */
.black-hole:hover {
    transform: scale(1.05);
}