:root{
    --content-max-width: 1170px; /* essaye 960 / 1040 / 1120 */
  }
/* KaTeX: formules en bloc */
.katex-display {
  padding: .6rem .8rem;
  margin: 1rem 0;
  border: 1px solid rgba(0,0,0,.12);
  border-radius: 10px;
  background: rgba(0,0,0,.03);
  overflow-x: auto; /* si formule longue */
}
/* KaTeX: inline */
.katex {
  padding: 0 .15rem;
  border-radius: 6px;
  background: rgba(0,0,0,.03);
}