/* ===== NOTES TAB ===== */
.notes-container {
  max-width: 750px;
  margin: 0 auto;
}

.notes-header {
  margin-bottom: 32px;
}

.notes-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.notes-summary {
  padding: 16px 20px;
  background: linear-gradient(135deg, rgba(124,58,237,0.08), rgba(6,182,212,0.08));
  border-radius: var(--radius);
  border-left: 3px solid var(--primary);
  font-family: var(--font-content);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
}

/* Sections */
.notes-section {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  border-left: 3px solid var(--primary);
}

.notes-section-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.notes-section-content {
  font-family: var(--font-content);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 16px;
}

/* Key Terms */
.key-terms {
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 12px;
}

.key-terms-title {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.key-term {
  display: flex;
  gap: 8px;
  padding: 6px 0;
  font-family: var(--font-content);
  font-size: 0.9rem;
  line-height: 1.5;
}

.key-term:not(:last-child) {
  border-bottom: 1px solid var(--border);
}

.key-term-name {
  font-weight: 600;
  color: var(--secondary);
  white-space: nowrap;
  flex-shrink: 0;
}

.key-term-def { color: var(--text); }

/* Bullet Points */
.notes-bullets {
  list-style: none;
  padding: 0;
}

.notes-bullets li {
  position: relative;
  padding: 4px 0 4px 20px;
  font-family: var(--font-content);
  font-size: 0.92rem;
  line-height: 1.6;
}

.notes-bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

/* Important Dates */
.notes-dates {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
}

.notes-dates-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.date-item {
  display: flex;
  gap: 12px;
  padding: 8px 0;
  font-family: var(--font-content);
  font-size: 0.9rem;
  border-left: 2px solid var(--secondary);
  padding-left: 16px;
  margin-bottom: 8px;
}

/* Common Mistakes */
.notes-mistakes {
  margin-bottom: 20px;
}

.notes-mistakes-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.mistake-item {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin-bottom: 10px;
  border-left: 3px solid var(--wrong);
  font-family: var(--font-content);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Notes Actions */
.notes-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* Highlight */
.highlight {
  background: rgba(251, 191, 36, 0.15);
  padding: 1px 4px;
  border-radius: 3px;
}

/* ===== Diagrams ===== */
.diagram-container {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  border-left: 3px solid var(--secondary);
}

.diagram-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.diagram-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 4px 0;
}

.diagram-svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.diagram-description {
  margin-top: 12px;
  font-family: var(--font-content);
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  text-align: center;
  font-style: italic;
}

@media (max-width: 768px) {
  .notes-title { font-size: 1.4rem; }
  .notes-section { padding: 18px; }
  .diagram-container { padding: 16px; }
  .diagram-wrapper { margin: 0 -8px; }
}