stylus/edit/codemirror-default.css

/* Built-in CodeMirror and addon customization */

.CodeMirror-hints {
  z-index: 999;
}
.CodeMirror-hint:hover {
  color: var(--bg);
  background: #08f;
}
.CodeMirror {
  border: solid var(--c80) 1px;
  transition: box-shadow .1s;
}
.CodeMirror {
  color: inherit;
  background-color: inherit;
  border: solid var(--c80) 1px;
  transition: box-shadow .1s;
}
.CodeMirror-gutters {
  background-color: var(--c95);
  border-color: var(--c85);
}
#stylus#stylus .CodeMirror {
  /* Using a specificity hack to override userstyles */
  /* Not using the ring-color hack as it became ugly in new Chrome */
  outline: none !important;
}
.CodeMirror-dialog {
  animation: highlight 3s cubic-bezier(.18, .02, 0, .94);
}
.CodeMirror-search-field {
  width: 10em;
}
.CodeMirror-jump-field {
  width: 5em;
}
.CodeMirror-search-hint {
  color: var(--c50);
}
.CodeMirror-activeline .applies-to:before {
  background-color: hsla(214, 100%, 90%, 0.15);
  content: "";
  top: 1em;
  left: 0;
  right: 0;
  bottom: 1em;
  position: absolute;
  pointer-events: none;
}
.CodeMirror-activeline .applies-to ul {
  z-index: 2;
}
.CodeMirror-foldgutter-open::after,
.CodeMirror-foldgutter-folded::after {
  top: 5px;
  width: 0;
  height: 0;
  content: "";
  position: absolute;
  border-style: solid;
  opacity: .5;
  left: 1px;
}
.CodeMirror-foldgutter-open::after {
  border-width: 5px 3px 0 3px;
  border-color: currentColor transparent transparent transparent;
}
.CodeMirror-foldgutter-folded::after {
  margin-top: -2px;
  margin-left: 1px;
  border-width: 4px 0 4px 5px;
  border-color: transparent transparent transparent currentColor;
}
.CodeMirror-linenumber {
  cursor: pointer; /* for bookmarking */
}

/* Custom stuff we add to CodeMirror */

.cm-uso-variable {
  font-weight: bold;
}
.gutter-bookmark {
  background: linear-gradient(0deg, hsla(180, 100%, 30%, .75) 2px, hsla(180, 100%, 30%, .2) 2px);
}

@media screen and (prefers-color-scheme: dark), dark {
  .CodeMirror-dialog {
    background-color: #333;
  }
  .CodeMirror-dialog-top {
    border-color: #555;
  }
  .CodeMirror-activeline-background {
    background: hsl(180, 21%, 18%);
  }
  .CodeMirror-selected,
  .CodeMirror-focused .CodeMirror-selected,
  .CodeMirror-line::selection,
  .CodeMirror-line > span::selection,
  .CodeMirror-line > span > span::selection {
    background: #444;
  }
  .CodeMirror-line::-moz-selection,
  .CodeMirror-line > span::-moz-selection,
  .CodeMirror-line > span > span::-moz-selection {
    /* TODO: remove this when strict_min_version >= 62 */
    background: #444;
  }
  .cm-s-default div.CodeMirror-cursor {
    border-left: 1px solid #fff;
  }
  /* Using Chromium's dark devtools colors */
  .cm-s-default .cm-atom,
  .cm-s-default .cm-number { color: #a1f7b5 }
  .cm-s-default .cm-attribute { color: #6194c6 }
  .cm-s-default .cm-bracket { color: #997 }
  .cm-s-default .cm-builtin,
  .cm-s-default .cm-link { color: #9fb4d6 }
  .cm-s-default .cm-comment { color: #747474 }
  .cm-s-default .cm-qualifier { color: #ffa34f }
  .cm-s-default .cm-def,
  .cm-s-default .cm-header,
  .cm-s-default .cm-tag,
  .cm-s-default .cm-type { color: #5db0d7 }
  .cm-s-default .cm-hr { color: #999 }
  .cm-s-default .cm-keyword { color: #9a7fd5 }
  .cm-s-default .cm-meta { color: #ddfb55 }
  .cm-s-default .cm-operator { color: #d2c057 }
  .cm-s-default .cm-string { color: #f28b54 }
  .cm-s-default .cm-variable { color: #d9d9d9 }
  .cm-s-default .cm-variable-2 { color: #72b9ff }
  .cm-s-default .cm-variable-3 { color: #9bbbdc }

  @keyframes highlight {
    from {
      background-color: #888;
    }
  }
}