codimd/public/js/lib/editor/markdown-lint/lint.css

/* The lint marker gutter */
.CodeMirror-lint-markers {
  width: 16px;
}

.CodeMirror-lint-tooltip {
  background-color: #ffd;
  border: 1px solid black;
  border-radius: 4px 4px 4px 4px;
  color: black;
  font-family: monospace;
  font-size: 10pt;
  overflow: hidden;
  padding: 2px 5px;
  position: fixed;
  white-space: pre;
  white-space: pre-wrap;
  z-index: 100;
  max-width: 600px;
  opacity: 0;
  transition: opacity .4s;
  -moz-transition: opacity .4s;
  -webkit-transition: opacity .4s;
  -o-transition: opacity .4s;
  -ms-transition: opacity .4s;
}

.CodeMirror-lint-mark-error, .CodeMirror-lint-mark-warning {
  background-position: left bottom;
  background-repeat: repeat-x;
}

.CodeMirror-lint-mark-error {
  background-image: url(/images/lint/mark-error.png);
  ;
}

.CodeMirror-lint-mark-warning {
  background-image: url(/images/lint/mark-warning.png);
}

.CodeMirror-lint-marker-error, .CodeMirror-lint-marker-warning {
  background-position: center center;
  background-repeat: no-repeat;
  cursor: pointer;
  display: inline-block;
  height: 16px;
  width: 16px;
  vertical-align: middle;
  position: relative;
  margin-left: 5px;
}

.CodeMirror-lint-message-error, .CodeMirror-lint-message-warning {
  padding-left: 18px;
  background-position: top left;
  background-repeat: no-repeat;
}

.CodeMirror-lint-marker-error, .CodeMirror-lint-message-error {
  background-image: url(/images/lint/message-error.png);
}

.CodeMirror-lint-marker-warning, .CodeMirror-lint-message-warning {
  background-image: url(/images/lint/message-warning.png);
}

.CodeMirror-lint-marker-multiple {
  background-image: url(/images/lint/mark-multiple.png);
  background-repeat: no-repeat;
  background-position: right bottom;
  width: 100%; height: 100%;
}