/* Teaching cards, intact source images and guide layouts. */
.chapter-actions {
  margin: var(--space-4) 0;
}

@media (max-width: 800px) {
  .chapter-actions {
    gap: var(--space-2);
  }
}

.lesson-grid {
  display: grid;
  grid-auto-rows: 1fr;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.lesson {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  padding: 20px;
  scroll-margin-top: 20px;
}

.lesson h2 {
  font-size: 22px;
  min-height: 2.8em;
  margin: var(--space-2) 0 var(--space-4);
}

.lesson-pictures {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: start;
}

.lesson-pictures figure {
  flex: 1 1 220px;
  margin: 0;
  min-width: 0;
}

.lesson:has(.lesson-pictures figure:nth-child(2)) .picture {
  min-height: 180px;
}

.lesson figcaption {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  margin: var(--space-2) 0 var(--space-4);
  overflow-wrap: anywhere;
}

.lesson figcaption a {
  color: var(--muted);
}

.lesson-content { display:flex; flex-direction:column; gap:20px; }

.lesson-copy {
  display:flex;
  flex-direction:column;
  flex:1;
  min-width:0;
  font-size: 16px;
}

.lesson-copy .actions { margin-top:auto; }

.lesson-copy p > b {
  display: block;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.05em;
  margin-bottom: 3px;
}

.lesson-copy p {
  margin-bottom: 14px;
}

.lesson-copy .trap {
  background: #fff8e7;
  border-left: 3px solid #d9af51;
  padding: 10px var(--space-3);
  border-radius: 0 6px 6px 0;
}

.lesson-copy .trap b {
  color: #88631c;
}

@media (max-width: 1150px) {
  .lesson-grid {
    grid-template-columns: 1fr;
  }

  .lesson-content {
    display: grid;
    grid-template-columns: minmax(150px, 0.65fr) minmax(0, 1fr);
    gap: 20px;
  }
}

@media (max-width: 800px) {
  .lesson-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .lesson-content {
    display:flex;
  }

  .lesson {
    padding: 18px;
  }

  .lesson .meta {
    display:grid;
    grid-template-columns:auto minmax(0,1fr) auto;
    grid-template-rows:minmax(3.5em,auto) minmax(2em,auto);
    gap:4px 8px;
  }

  .lesson .meta>.tag { grid-column:1/-1; grid-row:2; justify-self:start; }
  .lesson .meta>.review-mark { grid-column:3; grid-row:1; margin-left:0; }

  .lesson h2 {
    font-size: 20px;
  }

  .lesson-pictures .picture {
    min-height: 200px;
  }

  .lesson-pictures img {
    max-height: 320px;
  }

  .lesson-copy {
    font-size: 16px;
  }

  .lesson-copy .actions { margin-top:auto; }

.lesson-copy p > b {
    font-size: 13px;
  }
}

@media print {
  .lesson-grid,
.report-grid {
    display: block;
  }

  .lesson-content {
    display:flex;
  }

  .lesson-pictures img {
    max-height: 200px;
  }
}

.lesson-pictures .picture img {
  width: 100%;
  height: 240px;
  max-height: none;
  object-fit: contain;
}

.card-index {
  margin: 18px 0;
}

.card-index > summary {
  font-size: 14px;
  color: var(--muted);
}

.card-index .local-nav {
  margin: var(--space-2) 0 18px;
}

@media (max-width: 600px) {
  .lesson-pictures .picture img {
    height: 240px;
  }

  .card-index {
    margin: var(--space-3) 0;
  }
}

.teaching-illustrations {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: var(--space-6);
  margin: var(--space-6) 0;
}

.teaching-illustrations figure {
  margin: 0;
  min-width: 0;
}

.teaching-illustrations .picture {
  width: 100%;
  padding: var(--space-3);
  height: 168px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.teaching-illustrations img {
  width: 100%;
  height: 140px;
  object-fit: contain;
}

.teaching-illustrations figcaption {
  font-size: 15px;
  line-height: 1.75;
  margin-top: var(--space-3);
}

.teaching-illustrations figcaption p {
  margin: var(--space-2) 0;
  font-size: inherit;
}

.teaching-illustrations dl {
  margin: 10px 0 0;
}

.teaching-illustrations dl>div {
  display: grid;
  grid-template-columns: 2em minmax(0,1fr);
  gap: 10px;
  margin: 6px 0;
}

.teaching-illustrations dt {
  color: var(--accent-strong);
  font-weight: 650;
}

.teaching-illustrations dd {
  margin: 0;
}

.figure-source {
  margin-top: var(--space-1);
  color: var(--muted);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.figure-source summary {
  min-height: 44px;
  padding: 10px 0;
  cursor: pointer;
}

.figure-source a {
  display: block;
  min-height: 44px;
  padding: var(--space-2) 0;
}

.teaching-illustrations[data-illustration-count="1"] {
  grid-template-columns: minmax(0,680px);
  justify-content: start;
}

.teaching-illustrations[data-illustration-count="1"] figure {
  display: grid;
  grid-template-columns: 168px minmax(0,1fr);
  gap: var(--space-6);
}

.teaching-illustrations[data-illustration-count="1"] figcaption {
  margin-top: 0;
}

.teaching-illustrations[data-illustration-count="2"],
.teaching-illustrations[data-illustration-count="4"] {
  grid-template-columns: repeat(2,minmax(0,1fr));
}

@media(max-width:600px) {
  .teaching-illustrations[data-illustration-count] {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .teaching-illustrations[data-illustration-count="1"] figure {
    display: block;
  }

  .teaching-illustrations .picture {
    display: block;
    max-width: 240px;
    margin: 0 auto var(--space-3);
  }
}

.teaching-illustrations[data-illustration-count="1"] figure[data-illustration-kind^="scene-"] {
  display: block;
}

.teaching-illustrations figure[data-illustration-kind^="scene-"] .picture {
  display: block;
  max-width: none;
  height: auto;
  padding: var(--space-2);
  margin: 0 0 var(--space-4);
}

.teaching-illustrations figure[data-illustration-kind^="scene-"] img {
  display: block;
  height: auto;
  max-height: 480px;
}

@media(max-width:360px) {
  .teaching-illustrations[data-illustration-count] {
    grid-template-columns: 1fr;
  }
}

.teaching-feedback {
  margin: var(--space-3) 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--line);
}

.teaching-feedback li {
  margin-block: 10px;
}

.teaching-feedback ul {
  padding-inline-start: 1.4em;
}

.teaching-feedback strong,.knowledge-points strong,.book-points strong {
  font-weight: 750;
}

.chapter-actions>a {
  display: inline-flex;
  align-items: center;
  min-height: var(--control-height);
}

.guide-directory {
  display: grid;
  grid-auto-rows: 1fr;
  grid-template-columns: repeat(3,minmax(0,1fr));
  gap: 20px;
}

.guide-topic {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 0;
  overflow: hidden;
}

.guide-topic-picture {
  display: grid;
  place-items: center;
  height: 168px;
  min-height: 0;
  padding: 20px;
  background: var(--surface-subtle);
  border-bottom: 1px solid var(--line);
}

.guide-topic-picture img {
  display: block;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  object-fit: contain;
}

.guide-topic-copy {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: var(--space-2);
  padding: 20px;
}

.guide-topic-copy h2 {
  margin: 0;
  font-size: 21px;
}

.guide-topic-copy p {
  flex: 1;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.guide-topic-copy>span {
  display: flex;
  align-items: center;
  margin-top: auto;
  min-height: 36px;
  color: var(--accent-strong);
  font-size: 14px;
}

#visual-guides {
  margin-top: var(--space-6);
}

.guide-logic {
  padding: 0;
  border: 0;
  background: transparent;
  margin: var(--space-2) 0 var(--space-4);
}

.guide-logic>summary {
  min-height: 44px;
  padding: 10px 0;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
}

.guide-logic>p {
  max-width: var(--measure);
  padding: var(--space-4);
  background: var(--soft);
  border-radius: var(--radius-control);
}

.assessment-tools {
  margin: var(--space-4) 0;
  border-top: 1px solid var(--line);
}

.assessment-tools>summary {
  min-height: 44px;
  padding: 10px 0;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
}

@media(max-width:1000px) {
  .guide-directory {
    grid-template-columns: repeat(2,minmax(0,1fr));
  }
}

@media(max-width:600px) {
  .guide-directory {
    gap: var(--space-3);
  }

  .guide-topic-picture {
    height: 136px;
    padding: var(--space-4);
  }

  .guide-topic-copy {
    padding: var(--space-4);
  }

  .guide-topic-copy h2 {
    font-size: 18px;
  }

  .guide-topic-copy p {
    font-size: 14px;
  }
}

@media(max-width:360px) {
  .guide-directory {
    grid-template-columns: 1fr;
  }
}