message: art: meilleur point d'interrogation
diff: .info-bulle__interrogation-mark {
  - position: relative;
  color: var(--colour);
  border: 1px solid var(--colour);
  display: inline-block;
  - border-radius: 50%;
  -
  font-weight: bold;
  - font-size: 75%;
  user-select: none;
  - width: 1.5em;
  - height: 1.5em;
  + font-size: 75%;
  + width: 2.8ex;
  + border-radius: 50%;
  + margin-right: 0.2em;
  + padding: 1px;
  text-align: center;
  + text-decoration: none;
  }
  .info-bulle__interrogation-mark:focus {
  outline: 1px dotted var(--darkColour);
  