/* Lesson pages — extends styles.css */

.lesson-page .lesson-shell {
  width: min(920px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.25rem 0 3rem;
}

.lesson-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  font-size: 0.85rem;
  color: var(--ink-muted, #6b5748);
  margin-bottom: 1rem;
}
.lesson-crumb a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
.lesson-crumb a:hover { color: var(--cinnabar, #b23a2e); }

.lesson-hero h1 {
  font-family: "Noto Serif", Georgia, serif;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  line-height: 1.2;
  margin: 0.25rem 0 0.75rem;
  color: var(--ink, #1a120b);
}
.lesson-dek { margin: 0 0 1rem; color: var(--ink-soft, #3d2e24); max-width: 42rem; }
.lesson-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
  color: var(--ink-muted, #6b5748);
}
.lesson-meta li::before { content: "· "; opacity: 0.5; }
.lesson-meta li:first-child::before { content: none; }

.player-card {
  background: var(--paper-deep, #f3e6d4);
  border: 1px solid var(--line, #d9c4a8);
  border-radius: 16px;
  padding: 1rem 1rem 1.1rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 28px rgba(26, 18, 11, 0.06);
}
.player-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.player-head h2 { margin: 0; font-size: 1.05rem; }
.badge-local {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: #e8d5b5;
  color: #5c3d1e;
}
.badge-local.is-yt {
  background: #fde8e4;
  color: #8b1e14;
}
.lesson-player {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 16;
  max-height: min(72vh, 720px);
  margin-inline: auto;
  background: #0b1020;
  border-radius: 12px;
  overflow: hidden;
}
.lesson-player video,
.lesson-player iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  object-fit: contain;
  background: #0b1020;
}
.player-hint {
  margin: 0.65rem 0 0;
  font-size: 0.8rem;
  color: var(--ink-muted, #6b5748);
}
.player-hint code {
  font-size: 0.78em;
  background: rgba(0,0,0,0.06);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.lesson-grid {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.75rem;
}
@media (min-width: 720px) {
  .lesson-grid { grid-template-columns: 1fr 1fr; }
}

.panel {
  background: var(--paper, #faf4eb);
  border: 1px solid var(--line, #d9c4a8);
  border-radius: 14px;
  padding: 1.1rem 1.15rem 1.2rem;
}
.panel h2, .panel h3 {
  margin: 0 0 0.65rem;
  font-size: 1.05rem;
  font-family: "Noto Serif", Georgia, serif;
}
.panel blockquote {
  margin: 1rem 0 0;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--gold, #c9a227);
  background: rgba(201, 162, 39, 0.12);
  font-style: italic;
  color: var(--ink-soft, #3d2e24);
}
.bullets { margin: 0; padding-left: 1.15rem; color: var(--ink-soft, #3d2e24); }
.bullets li { margin: 0.35rem 0; }

.interact .section-head { margin-bottom: 1rem; }
.interact .panel { margin-bottom: 1rem; }

.quiz fieldset {
  border: 1px solid var(--line, #d9c4a8);
  border-radius: 10px;
  padding: 0.85rem 1rem 0.9rem;
  margin: 0 0 0.85rem;
  background: rgba(255,255,255,0.45);
}
.quiz legend {
  font-weight: 600;
  padding: 0 0.35rem;
  color: var(--ink, #1a120b);
}
.quiz label {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
  margin: 0.45rem 0;
  cursor: pointer;
  color: var(--ink-soft, #3d2e24);
}
.quiz label.is-correct { color: #1b6b3a; font-weight: 600; }
.quiz label.is-wrong { color: #8b1e14; }
.quiz .feedback {
  margin: 0.5rem 0 0;
  font-size: 0.88rem;
  font-weight: 500;
}
.quiz .feedback.ok { color: #1b6b3a; }
.quiz .feedback.bad { color: #8b1e14; }
.quiz fieldset.is-ok { border-color: #5bb87a; background: rgba(91, 184, 122, 0.08); }
.quiz fieldset.is-bad { border-color: #e08a7a; background: rgba(224, 138, 122, 0.1); }

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin-top: 0.5rem;
}
.quiz-score {
  margin: 0;
  flex: 1 1 100%;
  font-weight: 600;
  color: var(--ink-soft, #3d2e24);
}
@media (min-width: 560px) {
  .quiz-score { flex: 1 1 auto; text-align: right; }
}

.chip-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0 1rem;
  min-height: 2.5rem;
}
.chip {
  border: 1px solid var(--line, #d9c4a8);
  background: #fff;
  color: var(--ink, #1a120b);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  font: inherit;
  font-size: 0.9rem;
  cursor: grab;
  touch-action: manipulation;
}
.chip:active { cursor: grabbing; }
.chip.is-selected {
  outline: 2px solid var(--cinnabar, #b23a2e);
  outline-offset: 1px;
}
.chip.is-placed { opacity: 0.55; }
.bins {
  display: grid;
  gap: 0.75rem;
}
@media (min-width: 560px) {
  .bins { grid-template-columns: 1fr 1fr; }
}
.bin {
  border: 2px dashed var(--line, #d9c4a8);
  border-radius: 12px;
  padding: 0.65rem;
  min-height: 7rem;
  background: rgba(255,255,255,0.35);
  transition: border-color 0.15s, background 0.15s;
}
.bin.is-target {
  border-color: var(--cinnabar, #b23a2e);
  background: rgba(178, 58, 46, 0.06);
}
.bin h4 { margin: 0 0 0.5rem; font-size: 0.92rem; }
.bin-drop {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  min-height: 2.5rem;
}
.bin .chip { cursor: pointer; }
.classify-hint { margin: 0.75rem 0 0; font-size: 0.85rem; }

.practice .field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0.75rem 0;
}
.practice .field span { font-weight: 500; font-size: 0.92rem; }
.practice textarea {
  font: inherit;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--line, #d9c4a8);
  background: #fff;
  resize: vertical;
  color: var(--ink, #1a120b);
}
.practice textarea:focus {
  outline: 2px solid rgba(178, 58, 46, 0.35);
  border-color: var(--cinnabar, #b23a2e);
}

.lesson-pager {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 1.75rem 0 0.75rem;
}
.pager {
  padding: 0.65rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--line, #d9c4a8);
  text-decoration: none;
  color: var(--ink, #1a120b);
  background: var(--paper, #faf4eb);
  font-weight: 600;
  font-size: 0.92rem;
}
.pager:hover:not(.disabled) { border-color: var(--cinnabar, #b23a2e); }
.pager.disabled { opacity: 0.45; pointer-events: none; }
.next-teaser {
  text-align: center;
  color: var(--ink-muted, #6b5748);
  font-size: 0.92rem;
  margin: 0;
}

.muted { color: var(--ink-muted, #6b5748); }

@media (max-width: 480px) {
  .lesson-player { max-height: 58vh; }
  .player-card { padding: 0.75rem; }
}