/* Fixed black canvas: source dimensions never participate in layout. */
html body.student-page[data-knowledge-view="detail"] #knowledgeStudyPanel #studentKnowledgeDetail .knowledge-split-learning {
  transition: none !important;
}
html body.student-page[data-knowledge-view="detail"] #knowledgeStudyPanel #studentKnowledgeDetail .knowledge-visual-pane,
html body.student-page[data-knowledge-view="detail"] #knowledgeStudyPanel #studentKnowledgeDetail .knowledge-visual-pane :is(.student-module-card, .student-gallery-module, .student-gallery-stage, .student-gallery-image, .student-module-image, .memory-palace-viewer, .memory-palace-stage) {
  background: #000 !important;
}
html body.student-page[data-knowledge-view="detail"] #knowledgeStudyPanel #studentKnowledgeDetail .knowledge-visual-pane .student-gallery-stage {
  position: relative !important;
  width: 100% !important;
  height: var(--knowledge-visual-height, 150vw) !important;
  min-height: 0 !important;
  max-height: none !important;
  padding: 0 !important;
  border: 0 !important;
  aspect-ratio: 2 / 3 !important;
  overflow: hidden !important;
}
html body.student-page[data-knowledge-view="detail"] #knowledgeStudyPanel #studentKnowledgeDetail .knowledge-visual-pane .student-gallery-image {
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
  min-height: 0 !important;
  padding: 0 !important;
  border: 0 !important;
}
html body.student-page[data-knowledge-view="detail"] #knowledgeStudyPanel #studentKnowledgeDetail .knowledge-visual-pane .student-gallery-image img[data-gallery-main-image] {
  display: block !important;
  width: 100% !important;
  height: 100% !important;
  max-height: none !important;
  object-fit: contain !important;
  object-position: center !important;
  background: #000 !important;
  opacity: 1 !important;
  transform: none !important;
  transition: none !important;
}
@media (max-width: 760px) {
  html body.student-page[data-knowledge-view="detail"] #knowledgeStudyPanel #studentKnowledgeDetail .knowledge-split-learning {
    --knowledge-visual-height: 150vw;
    grid-template-rows: var(--knowledge-visual-height) auto !important;
  }
  html body.student-page[data-knowledge-view="detail"] #knowledgeStudyPanel #studentKnowledgeDetail .knowledge-visual-pane {
    height: var(--knowledge-visual-height) !important;
    min-height: 0 !important;
    max-height: none !important;
  }
}