owickstrom.github.io/the-monospace-web/ by myfonj

/* ==UserStyle==
@name           owickstrom.github.io/the-monospace-web/
@namespace      github.com/openstyles/stylus
@version        1.1.1
@description    Dimmed and JetBrains adjusted
@author         myf
@license        CC0
==/UserStyle== */
@-moz-document url-prefix("https://owickstrom.github.io/the-monospace-web/") {
:root {
 /*

  Character Variants settings for JetBrains Mono

  (All are off by default, left them here all for reference.)
  H/T https://wakamaifondue.com/ for the inspect!
  Officially documented at:
  https://github.com/JetBrains/JetBrainsMono/wiki/OpenType-features
  This set is pretty much like "ss01" but with "cv07" on
   or like "ss02" but with "cv05" off
  "id" state `affected glyphs` effect when enabled (my pref/ note)
  */
 font-feature-settings:
 "calt" 0, /* Contextual alternates a.k.a. "programming ligatures" (off/ better off) */
           /* 0 obliterates all of them including spacing adjustments of 1:2 and block comments */
 "ss19" 1, /* `=== !==` ligatures "normal": with gaps (on/ when "calt" 1) */
 "zero" 0, /* `0` slashed, instead of dotted */
 "cv01" 1, /* `l` flat bottom bar serif instead of curve (on!!)*/
 "cv02" 0, /* `t` bottom curve instead of hook */
 "cv03" 0, /* `g` double-storey (/ sadly not so nice) */
 "cv04" 0, /* `j` rounded bottom hook */
 "cv05" 0, /* `l` rounded bottom hook */
 "cv06" 1, /* `m` smaller middle apex (on!) */
 "cv07" 1, /* `W` smaller middle apex (on!!) */
 "cv08" 0, /* `K Ж` straight arms without horizontal joint */
 "cv09" 1, /* `f` flat bottom bar serif (on!!) */
 "cv10" 1, /* `r` flat bottom bar serif (on!!) */
 "cv11" 1, /* `y λ` rounded tails (on!!) */
 "cv12" 1, /* `u` spur (on!) */
           /* Triskaidekaphobia?? */
 "cv14" 1, /* `¢ $` broken strikes (on?) */
 "cv15" 0, /* `&` like 'ET' (/ probably too much)*/
 "cv16" 1, /* `Q` curved tail' */
 "cv17" 0, /* `f` rounded arm */
 "cv18" 1, /* `2,6,9 curved diagonals (on/ looks nice, but might be harder to read) */
 "cv19" 0, /* `8` symmetrical halves */
 "cv20" 1, /* `5` rounded bow, no horizontal midline (on) */
 "cv99" 0, /* `С с` inverted‽‽ (/ it's a cyrillic "es") */
 "liga" 0, /* has no effet, see "calt" and "ss19" */
 "ss00" 0; /* // Just a terminating bogus without comma. */
}

/*
Dimmer contrast, softer borders
*/ 
@media (prefers-color-scheme: dark) {
 :root {
 --text-color: #ccc;
 --text-color-alt: #999;
 --text-color-emphasize: #fff;
 --background-color: #111;
 --background-color-alt: #222;
 --border-color: color-mix(in oklab,
  currentcolor,
  var(--background-color));
 }
}


h1, h2, h3, h4, h5, h6,
th, dt, label,
strong, em, b, i {
 color: var(--text-color-emphasize, var(--text-color));
}
*:not(:focus):not(:any-link:hover) {
 &,
 &::before,
 &::after {
  border-color: var(--border-color);
  text-decoration-color: var(--border-color) !important;
 }
}

}