/* Target the cover image specifically */
.quarto-cover-image {
  width: 400px !important;
  height: auto !important;
  max-width: none !important;
  display: block !important;
  margin: 0 auto !important;
}

/* If you want to center the container as well */
.quarto-cover-image {
  width: 400px !important;
  height: auto !important;
  max-width: none !important;
  display: block !important;
  margin: 2rem auto !important;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}