:root {
  --dmm-ink: #111827;
  --dmm-muted: #4b5563;
  --dmm-border: #d1d5db;
  --dmm-soft: #f8fafc;
}
body { color: var(--dmm-ink); line-height: 1.65; }
h1, h2, h3 { letter-spacing: -0.01em; }
.callout { border-radius: 10px; }
.screenshot-placeholder, .video-placeholder, .student-task, .reporting-box {
  border: 1px solid var(--dmm-border);
  background: var(--dmm-soft);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin: 1.2rem 0;
}
.screenshot-placeholder strong, .video-placeholder strong { display: block; margin-bottom: 0.4rem; }
.table-caption, figcaption { color: var(--dmm-muted); font-size: 0.92rem; }
.copy-template {
  border: 1px dashed var(--dmm-border);
  background: #ffffff;
  padding: 0.8rem;
  border-radius: 8px;
}


.chapter-source-note, .worked-example, .teaching-plan, .review-box, .solution-box {
  border: 1px solid var(--dmm-border);
  background: #ffffff;
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin: 1.2rem 0;
}
.chapter-source-note {
  background: #f9fafb;
  font-size: 0.95rem;
}
.worked-example {
  background: #fbfdff;
}
.copy-template {
  white-space: normal;
}
blockquote {
  border-left: 4px solid var(--dmm-border);
  padding-left: 1rem;
  color: var(--dmm-muted);
}

/* V9 Quarto table styling */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.1rem 0 1.4rem 0;
  font-size: 0.96rem;
}
table caption {
  caption-side: top;
  text-align: left;
  color: var(--dmm-muted);
  font-weight: 600;
  margin-bottom: 0.45rem;
}
thead th {
  background: var(--dmm-soft);
  border-top: 1px solid var(--dmm-border);
  border-bottom: 1px solid var(--dmm-border);
}
th, td {
  border-bottom: 1px solid var(--dmm-border);
  padding: 0.55rem 0.65rem;
  vertical-align: top;
}
tbody tr:nth-child(even) {
  background: #fcfcfd;
}