:root {
  --course-panel-bg: rgba(255, 255, 255, 0.8);
  --course-panel-border: rgba(0, 0, 0, 0.08);
}

.hero-panel,
.course-card,
.resource-card,
.choice-card,
.lesson-panel,
.visual-panel,
.timeline-panel {
  background: var(--course-panel-bg);
  border: 1px solid var(--course-panel-border);
  border-radius: 0.5rem;
  box-shadow: 0 0.35rem 1rem rgba(0, 0, 0, 0.06);
  padding: 1.25rem;
}

.course-grid,
.choice-grid,
.resource-grid {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0;
}

.course-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.choice-grid,
.resource-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.lesson-grid,
.visual-grid,
.timeline-grid {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0;
}

.lesson-grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.visual-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: stretch;
}

.timeline-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.kicker {
  color: var(--bs-primary);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.callout.callout-style-default {
  border-radius: 0.5rem;
}

.placeholder-figure {
  margin: 1.25rem 0;
}

.placeholder-figure img,
.visual-panel img {
  width: 100%;
  border-radius: 0.5rem;
  border: 1px solid var(--course-panel-border);
  box-shadow: 0 0.35rem 1rem rgba(0, 0, 0, 0.08);
}

.metric {
  color: var(--bs-primary);
  display: block;
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.35rem;
}

.microcopy {
  color: rgba(0, 0, 0, 0.68);
  font-size: 0.96rem;
}

.reveal .slide .placeholder-figure img,
.reveal .slide .visual-panel img {
  max-height: 380px;
  object-fit: cover;
}

.reveal .slide .lesson-panel,
.reveal .slide .visual-panel,
.reveal .slide .timeline-panel {
  background: rgba(255, 255, 255, 0.84);
}

.sidebar nav[role="doc-toc"] ul,
#quarto-sidebar .sidebar-item-container .sidebar-item-text {
  font-size: 0.96rem;
}

@media (max-width: 768px) {
  .quarto-title-block .quarto-title-banner {
    padding-top: 2.5rem;
    padding-bottom: 2rem;
  }
}