#fluid-background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    opacity: 0;
    mix-blend-mode: overlay;
    transition: opacity 1.5s ease;
}

#fluid-background-container svg {
    width: 100%;
    height: 100%;
    filter: blur(0.8px) brightness(0.8);
}

/* Show when background is active */
.fluid-background-active #fluid-background-container {
    opacity: 0.5;
}

@media (max-width: 768px) {
    #fluid-background-container {
        display: none !important;
    }
}

@media (min-width: 769px) {
    body:not(.hotline-miami-theme):not(.akai-theme):not(.star-glitcher-theme):not(.frutiger-aero-theme) #fluid-background-container {
        display: block;
    }
    
    body.hotline-miami-theme #fluid-background-container,
    body.akai-theme #fluid-background-container,
    body.star-glitcher-theme #fluid-background-container,
    body.frutiger-aero-theme #fluid-background-container {
        opacity: 0.2;
        mix-blend-mode: soft-light;
    }
    
    /* Reduce opacity when enter screen is active */
    #enter-screen.active ~ * #fluid-background-container {
        opacity: 0.3;
    }
    
    /* Smooth transition during enter screen fade out */
    #enter-screen.fade-out ~ * #fluid-background-container {
        opacity: 0.6;
        transition: opacity 1.5s ease;
    }
}