gnu-social/public/assets/default_theme/root.css

:root {
    --m:1.067em;
    --s:.666em;
    --unit:1em;
    --xl:1.138em;
    --xxl:3.138em;
}

@media(prefers-color-scheme: dark) {
    :root {
        --accent:#5ddbcf;
        --background-card:#0e0e0f;
        --background-checkerboard:repeating-conic-gradient(#ffffff66 0 90deg,#ffffff33 0 180deg) 0 0/40px 40px round;
        --background-hard:#0e0e0f;
        --border:#26262c;
        --foreground:#eff0f1;
        --gradient:linear-gradient(5deg,var(--border) -33%,transparent 66%)!important;
        --gradient-backwards:linear-gradient(-5deg,var(--border) -33%,transparent 66%)!important;
        --shadow:0 5px 20px -10px rgba(255,255,255,.1)!important;
        --shadow-inset-accent:inset 0 0 0 2px var(--accent);
    }
}

@media(prefers-color-scheme: light) {
    :root {
        --accent:#a22430;
        --background-card:#f0f0f0;
        --background-checkerboard:repeating-conic-gradient(#ffffff66 0 90deg,#ffffff33 0 180deg) 0 0/40px 40px round;
        --background-hard:#ebebeb;
        --border:#c2c2c2;
        --foreground:#09090d;
        --gradient:linear-gradient(10deg,var(--background-hard) 0,transparent)!important;
        --gradient-backwards:linear-gradient(290deg,var(--background-hard) 0,var(--background-card) 100%)!important;
        --shadow:0 5px 20px -10px rgba(0,0,0,.1)!important;
        --shadow-inset-accent:inset 0 0 0 2px var(--accent);
    }
}