ynab.css

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;1,100;1,200;1,300;1,400;1,500;1,600;1,700&display=swap');

/* ==UserStyle==
@name           
@namespace      github.com/openstyles/stylus
@version        1.0.0
@description    A new userstyle
@author         Me
==/UserStyle== */
bdi,
.sidebar-left bdi {
    opacity: 0.15;
    display: none;
}

svg use[href="#icon_sprite_check"] {
    opacity: .15;
    display: none;
}

.user-data.currency.tabular-nums.negative,
.user-data.currency.tabular-nums.positive,
.user-data.currency.tabular-nums.zero,
.user-data.currency.tabular-nums.cautious {
    font-family: "IBM Plex Mono", monospace !important;
    font-weight: 400;
    font-size: 13px !important;
}
.sidebar-left .user-data.currency.tabular-nums.negative {
    background-color: rgba(255, 0, 0, 0.15);
}
.nav-account-block .user-data.currency.tabular-nums.positive,
.sidebar-left .user-data.currency.tabular-nums.zero {
    padding-right: .125rem !important;
}
.user-data.currency.tabular-nums.zero {
    opacity: 0.25;
}
.ynab-new-budget-available-number.js-budget-available-number.user-data.zero {
    background-color: transparent !important;
}