Sfera: login page by Li-Gru

/* ==UserStyle==
@name         Sfera: login page
@version      20230722.14.37
@namespace    userstyles.world/user/Li-Gru
@description  Sfera style
@author       Li-Gru
@license      WTFPL
==/UserStyle== */

@-moz-document regexp(".*sfera.*") {
    [ data-testid="login-page" ]{
        background-image: url("https://i.ibb.co/B67KnSz/1234.jpg") !important;
        background-color: rgb(195, 0, 10);
        background-position-x: left;
        background-position-y: top;
    }
    [ data-testid="login-form" ] > div:first-child { visibility: hidden; }
    [ data-testid="login-form" ] > div:first-child::before { 
        visibility: visible;
        content: 'Готов к приключению? ';
    }

    [ data-field-name="username" ] > div > label { visibility: hidden; }
    [ data-field-name="username" ] > div > label::before {
        visibility: visible;
        content: 'Кличка: ';
    }
    [ data-field-name="password" ] > div > label { visibility: hidden; }
    [ data-field-name="password" ] > div > label::before {
        visibility: visible;
        content: 'Стоп-слово: ';
    }
}