body {
    margin: 0;
    overflow: hidden;
    height: 100vh;
    font-family: sans-serif;
}

.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('background.jpg');
    background-size: cover;
    background-position: center;
    z-index: 0;
}

#firefly-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none; /* Allows clicks to pass through */
}

.firefly {
    position: absolute;
    width: 6px;
    height: 6px;
    background: yellow;
    border-radius: 50%;
    box-shadow: 0 0 8px 2px yellow;
    opacity: 0.8;
    animation: blink 2s infinite ease-in-out;
    animation-delay: var(--delay);
}

@keyframes blink {
    0%, 100% {
        opacity: 0.2;
    }

    50% {
        opacity: 1;
    }
}