/* ===== Lesson Page (Full Page) ===== */
.lesson-page {
  max-width: 700px;
  margin: 0 auto;
}
.lesson-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid #eee;
}
.lesson-title-section {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
}
.lesson-icon { font-size: 1.3rem }
.lesson-content {
  min-height: 60vh;
}
.lesson-intro-page {
  text-align: center;
  padding: 40px 0;
}
.lesson-meta-info {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.quiz-area {
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Completion Page (Full Page) ===== */
.completion-page {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}
.completion-hero {
  padding: 32px 0 20px;
}
.completion-hero h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--text);
  margin-top: 8px;
}
.completion-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}
.completion-lesson-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary-dark);
}
.completion-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.completion-streak-info {
  margin-top: 16px;
}
.streak-level {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
}
.streak-level.level-0 { background: #F5F5F5; color: var(--text-secondary) }
.streak-level.level-1 { background: #FFF3E0; color: #E65100 }
.streak-level.level-2 { background: linear-gradient(135deg,#FFE0B2,#FFCC80); color: #E65100 }
.streak-level.level-3 { background: linear-gradient(135deg,#FF6B35,#FF8C42); color: #fff }
.streak-level-emoji { font-size: 1.2rem }

/* ===== Lesson Intro Page (Full Page) ===== */
.lesson-intro-page {
  text-align: center;
  padding: 40px 16px 24px;
}

/* ── Content Blocks (v2) ───────────────────────────── */
.lesson-content-blocks {
  text-align: left;
  max-width: 640px;
  margin: 0 auto;
  padding: 8px 0 32px;
}
.content-block {
  display: flex;
  gap: 14px;
  padding: 18px 20px;
  margin-bottom: 14px;
  border-radius: var(--radius-sm);
  line-height: 1.7;
}
.content-block-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  padding-top: 2px;
}
.content-block-body { flex: 1; min-width: 0; }
.content-block-title {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 6px;
}
.content-block-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* Concept Card */
.concept-block {
  background: var(--bg-card);
  box-shadow: var(--shadow);
}

/* Keypoint Highlight */
.keypoint-block {
  background: linear-gradient(135deg, #FFF8E1, #FFF3CD);
  border-left: 4px solid var(--primary-light);
}

/* Quote Block */
.quote-block {
  position: relative;
  padding: 20px 24px;
  margin-bottom: 14px;
  background: var(--bg-path);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary-light);
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--text-secondary);
}
.quote-block p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
}
.quote-block cite {
  display: block;
  margin-top: 8px;
  font-size: 0.82rem;
  font-style: normal;
  color: var(--text-muted);
}

/* ===== Unit Lesson List Page ===== */
.unit-page {
  max-width: 700px;
  margin: 0 auto;
}
.unit-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid #eee;
}
.unit-page-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}
.unit-progress-bar {
  margin-bottom: 20px;
}
.unit-progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.lessons-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.lesson-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: #fff;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}
.lesson-card:hover {
  border-color: var(--primary-light);
  transform: translateY(-1px);
}
.lesson-card.done {
  background: #E8F5E9;
  border-color: var(--success);
}
.lesson-card.next {
  background: #FFFDF5;
  border-color: var(--gold);
}
.lesson-card[data-can-click="false"] {
  opacity: 0.5;
  cursor: not-allowed;
}
.lesson-card-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
}
.lesson-card-body { flex: 1; min-width: 0; }
.lesson-card-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 2px;
}
.lesson-card-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
}