/* Shared course reader. Preserve lesson markup, illustrations and assessment controls. */
.course-catalog-theme .page-shell {
  width: calc(100% - 40px); max-width: 1400px; margin-inline: auto;
  color: var(--desk-text); background: var(--desk-panel);
}
.course-catalog-theme :is(.page-hero h1, .course-subcategory-heading h3) { color: var(--desk-text); }
.course-catalog-theme .hero-description { color: var(--desk-muted); }
.course-catalog-theme .placeholder-panel { background: transparent; border: 0; box-shadow: none; }
.course-catalog-theme :is(.course-grid, .course-subcategory-grid) { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; }
.course-catalog-theme .course-subcategory { margin-block: 24px; }
.course-catalog-theme .course-card {
  display: flex; align-items: center; justify-content: space-between; min-height: 64px;
  padding: 18px 12px; color: var(--desk-text); background: transparent;
  border: 0; border-bottom: 1px solid var(--desk-border); border-radius: 0; box-shadow: none;
}
.course-catalog-theme .course-card::after { content: "→"; color: var(--desk-accent); }
.course-catalog-theme .course-card h3 { margin: 0; color: inherit; font-size: 1rem; }
.course-catalog-theme .course-card--prealgebra h3 { display: inline-flex; align-items: center; gap: 9px; min-width: 0; }
.course-catalog-theme .course-card--prealgebra .prealgebra-course-icon { width: 24px; height: 24px; flex: 0 0 24px; }
.course-catalog-theme .course-card--prealgebra h3 span { min-width: 0; }
.course-catalog-theme .course-card:hover { background: #263b3d; transform: none; }
.course-catalog-theme .course-tabs { display: flex; flex-wrap: wrap; gap: 12px; }
.course-catalog-theme .course-tab { color: var(--desk-muted); background: transparent; border: 1px solid var(--desk-border); box-shadow: none; }
.course-catalog-theme .course-tab.active { color: var(--desk-accent); background: #263b3d; }
body.course-reader-theme .course-page-shell {
  width: calc(100% - 40px); max-width: 1600px; min-width: 0;
  margin-inline: auto; background: var(--desk-panel); color: var(--desk-text);
}
.course-reader-theme .course-content-panel {
  padding: 0; border: 0; background: transparent; box-shadow: none;
}
.course-reader-theme .course-workspace {
  display: grid; grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  width: 100%; max-width: 1600px; margin-inline: auto;
  gap: 0; align-items: start; border: 1px solid var(--desk-border);
  background: var(--desk-panel); border-radius: 8px; overflow: visible;
}
.course-reader-theme .course-reader-toolbar {
  grid-column: 1 / -1; padding: 12px 18px; border-bottom: 1px solid var(--desk-border);
}
.course-reader-theme .course-reader-toolbar button,
.course-reader-theme .course-reader-pagination a {
  display: inline-flex; min-height: 44px; align-items: center; padding: 9px 16px;
  border: 1px solid var(--desk-border); border-radius: 5px;
  color: var(--desk-accent); background: transparent; font: inherit; text-decoration: none;
}
.course-reader-theme .course-workspace.contents-collapsed { grid-template-columns: minmax(0, 1fr); }
.course-reader-theme .course-workspace-sidebar {
  position: static; width: auto; min-width: 0; max-height: none; overflow: visible;
  color: var(--desk-text); background: transparent; border: 0;
  border-right: 1px solid var(--desk-border); border-radius: 0; box-shadow: none;
}
.course-reader-theme .course-workspace-sidebar[hidden] { display: none; }
.course-reader-theme .course-workspace-viewer { min-width: 0; padding: 0; }
.course-reader-theme .course-workspace-viewer .course-lesson-view { width: 100%; min-width: 0; }
.course-reader-theme .course-workspace-viewer .lesson-article {
  width: 100%; min-width: 0; box-sizing: border-box;
  padding: clamp(22px, 4vw, 64px); margin: 0; border: 0; border-radius: 0;
  color: var(--desk-text); background: transparent; box-shadow: none;
  font: 400 1rem/1.85 "Manrope", "Noto Sans KR", system-ui, sans-serif;
  overflow-wrap: break-word;
}
.course-reader-theme .course-workspace-viewer .lesson-article :is(p, li, dd, figcaption) {
  font-size: 1rem; line-height: 1.85; color: inherit;
}
.course-reader-theme .course-workspace-viewer .lesson-article p { max-width: none; }
.course-reader-theme .course-workspace-viewer .lesson-article :is(h1, h2, h3, h4, h5, h6, p, li, dd, figcaption, a) {
  overflow-wrap: break-word; word-break: normal;
}
.course-reader-theme .lesson-article-header :is(h1, h2) {
  color: var(--desk-text); font-size: clamp(1.7rem, 3vw, 2.5rem); line-height: 1.3;
}
.course-reader-theme .course-workspace-viewer .lesson-article :is(h3, h4) {
  color: var(--desk-text); font-size: 1.2rem; line-height: 1.5;
}
.course-reader-theme .course-workspace :is(.lesson-note, .lesson-checkpoint) {
  background: var(--desk-raised); border-color: var(--desk-border); box-shadow: none;
}
.course-reader-theme .course-workspace-heading,
.course-reader-theme .course-workspace-tabs,
.course-reader-theme .course-workspace-menu,
.course-reader-theme .course-workspace-sidebar .placeholder-card {
  color: var(--desk-text); background: transparent; border-color: var(--desk-border); box-shadow: none;
}
.course-reader-theme .course-workspace-sidebar :is(.lesson-link-card, .lesson-category-toggle) {
  color: var(--desk-text); background: transparent; border: 0;
  border-bottom: 1px solid var(--desk-border); border-radius: 0; box-shadow: none;
  white-space: normal; height: auto;
}
.course-reader-theme .course-workspace-sidebar :is(.lesson-link-card.active, .lesson-category-toggle.active),
.course-reader-theme .course-workspace-tabs button.active { background: #263b3d; color: var(--desk-accent); }
.course-reader-theme .course-workspace-heading :is(strong, span),
.course-reader-theme .course-workspace-tabs button { color: var(--desk-text); }
.course-reader-theme .course-workspace-empty { background: transparent; color: var(--desk-muted); }
.course-reader-theme .course-reader-pagination {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px;
  margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--desk-border);
}
.course-reader-theme .lesson-article :is(img, video, svg) { max-width: 100%; }
.course-reader-theme .lesson-article :is(img, video) { height: auto; object-fit: contain; }
.course-reader-theme .lesson-article iframe { max-width: 100%; }
.course-reader-theme .lesson-article mjx-container[display="true"] {
  max-width: 100%; overflow-x: auto; overflow-y: hidden; padding-block: 8px;
}
.course-reader-theme .lesson-article table { display: block; max-width: 100%; overflow-x: auto; }
@media (max-width: 920px) {
  body.course-reader-theme .course-page-shell { width: 100%; margin: 0; }
  .course-reader-theme .course-workspace { grid-template-columns: minmax(0, 1fr); }
  .course-reader-theme .course-workspace-sidebar { border-right: 0; border-bottom: 1px solid var(--desk-border); }
}