Dark Busuu by ghotriw

/* ==UserStyle==
@name         Dark Busuu
@version      20240201.02.01
@namespace    ?
==/UserStyle== */

@-moz-document regexp("https://([a-zA-Z0-9-]+\\.)*busuu\\.com/.*") {
    
    :root {
        --contrast-value: 85;
        --contrast-general: calc(var(--contrast-value)/100);
        --contrast-images: calc(1/var(--contrast-value)*100);
    }

    html {
         filter: invert(1) hue-rotate(180deg) contrast(var(--contrast-general));
    }


    img,
    video,
    [style*="background-image"] {
        filter: invert(1) hue-rotate(180deg) contrast(var(--contrast-images));
    }
    
    .react-modal__overlay {
        background-color: rgb(237 237 237 / 60%);
    }
}