/* Substantiate, Don't Assume — book styles */

/* Tessera Case — the running engagement "dossier" used in every chapter.
   A neutral slate to read as a case file and to stay distinct from the
   blue AI-Field-Note callout, the red Auditing-AI callout, the green
   Evidence-Locker callout, and the yellow Watch-out callout. */
.tessera-case {
  background: #f1f5f9;
  border-left: 4px solid #475569;
  border-radius: 6px;
  padding: 1em 1.25em;
  margin: 1.5em 0;
}

.tessera-case > :first-child {
  margin-top: 0;
}

.tessera-case > :last-child {
  margin-bottom: 0;
}

/* Case-box header line ("🗂️ Tessera Case — …") */
.tessera-case h3,
.tessera-case h4 {
  margin-top: 0;
  border-bottom: none;
  color: #334155;
}

/* Dark-mode variant */
.quarto-dark .tessera-case {
  background: #1e293b;
  border-left-color: #94a3b8;
}

.quarto-dark .tessera-case h3,
.quarto-dark .tessera-case h4 {
  color: #cbd5e1;
}