kinathai.user.css

/* ==UserStyle==
@name           Empty @name replaces the default template - 2/11/2019, 12:57:34 PM
@namespace      github.com/openstyles/stylus
@version        1.0.0
@description    A new userstyle
@author         Me
==/UserStyle== */

@-moz-document url-prefix("https://tornby.kina-thai.se/") {
    /* Insert code here... */
    .meny #content > .container, .event #content > .container, .catering #content > .container {
        background: rgb(255, 255, 255);
    }
    
    body {
        background: url('https://i.imgur.com/0XRbwBN.png');
    }
}