Hide flutter book left navigator by alanwei

/* ==UserStyle==
@name         Hide flutter book left navigator
@version      20220210.11.47
@namespace    userstyles.world/user/alanwei
@description  Hide book.flutterchina.club left navigator
@author       alanwei
@license      No License
==/UserStyle== */

@-moz-document domain("book.flutterchina.club") {
.sidebar {
    display: none;
    width: 0;
    height: 0;
}
.page {
    width: 100%;
    padding-left: 0;
}
    .theme-default-content:not(.custom) {
        max-width: 100%
    }
}