/* Lesson page styles */

/* Breadcrumb navigation */
.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px 0;
  font-size: 0.85rem;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-item a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.breadcrumb-item a:hover {
  color: var(--accent);
}

.breadcrumb-item.current {
  color: var(--text-primary);
}

.breadcrumb-separator {
  color: var(--text-secondary);
  opacity: 0.5;
}

.lesson-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 100px;
}

.lesson-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.lesson-badge {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  color: var(--accent);
  background: rgba(34, 197, 94, 0.1);
  padding: 6px 12px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lesson-badge.practical {
  color: var(--warning);
  background: rgba(245, 158, 11, 0.1);
}

.lesson-number {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.lesson-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 32px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

/* Lesson Content */
.lesson-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 40px 0 16px;
  color: var(--text-primary);
}
.lesson-content p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 20px;
}
.lesson-content strong {
  color: var(--text-primary);
}
.lesson-content ul,
.lesson-content ol {
  color: var(--text-secondary);
  margin: 16px 0 24px 24px;
}
.lesson-content li {
  margin-bottom: 8px;
  line-height: 1.7;
}
.lesson-content code {
  background: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.9em;
}

/* Callout boxes */
.callout {
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent);
  padding: 20px 24px;
  margin: 28px 0;
  border-radius: 0 8px 8px 0;
}
.callout p {
  margin-bottom: 0;
  font-size: 1rem;
}
.callout.warning {
  border-left-color: var(--warning);
}

/* Analogy box */
.analogy-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 28px 0;
}
.analogy-box h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.analogy-box p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Highlight box */
.highlight-box {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: 12px;
  padding: 24px;
  margin: 28px 0;
  text-align: center;
}
.highlight-box p {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

/* Key takeaway */
.key-takeaway {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: 12px;
  padding: 24px;
  margin: 40px 0;
}
.key-takeaway h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.key-takeaway ul {
  margin: 0;
  padding-left: 20px;
}
.key-takeaway li {
  color: var(--text-secondary);
  margin-bottom: 6px;
}

/* Navigation */
.lesson-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  margin-top: 48px;
  border-top: 1px solid var(--border);
}
.lesson-nav-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 12px 20px;
  border-radius: 8px;
  transition: all 0.2s;
}
.lesson-nav-btn:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}
.lesson-nav-btn.primary {
  background: var(--accent);
  color: #000;
  font-weight: 600;
}
.lesson-nav-btn.primary:hover {
  background: var(--accent-dim);
}

/* Progress dots */
.progress-dots {
  display: flex;
  gap: 8px;
}
.progress-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
}
.progress-dot.active {
  background: var(--accent);
}
.progress-dot.active.practical {
  background: var(--warning);
}
.progress-dot.completed {
  background: var(--accent-dim);
}

@media (max-width: 600px) {
  .lesson-nav {
    flex-direction: column;
    gap: 16px;
  }
  .lesson-nav-btn {
    width: 100%;
    justify-content: center;
  }
  .workflow-step {
    padding-left: 24px;
    padding-top: 64px;
  }
  .workflow-step::before {
    top: 20px;
    left: 20px;
  }
  .decision-grid {
    grid-template-columns: 1fr;
  }
}

/* Token table (basics/2) */
.token-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}
.token-table th,
.token-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.token-table th {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.token-table td {
  color: var(--text-secondary);
}
.token-table td:first-child {
  color: var(--text-primary);
}
.token-table td:last-child {
  font-family: "JetBrains Mono", monospace;
  color: var(--accent);
}

/* Attention diagram (basics/3) */
.attention-diagram {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 28px 0;
}
.attention-diagram h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.attention-bar {
  display: flex;
  align-items: end;
  height: 80px;
  gap: 4px;
  margin-bottom: 12px;
}
.attention-segment {
  flex: 1;
  background: var(--accent);
  border-radius: 4px 4px 0 0;
  transition: height 0.3s;
}
.attention-segment:nth-child(1) {
  height: 90%;
}
.attention-segment:nth-child(2) {
  height: 70%;
}
.attention-segment:nth-child(3) {
  height: 40%;
  opacity: 0.6;
}
.attention-segment:nth-child(4) {
  height: 30%;
  opacity: 0.4;
}
.attention-segment:nth-child(5) {
  height: 25%;
  opacity: 0.3;
}
.attention-segment:nth-child(6) {
  height: 30%;
  opacity: 0.4;
}
.attention-segment:nth-child(7) {
  height: 50%;
  opacity: 0.7;
}
.attention-segment:nth-child(8) {
  height: 75%;
}
.attention-segment:nth-child(9) {
  height: 95%;
}
.attention-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Decision grid (basics/4) */
.decision-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 28px 0;
}
.decision-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.decision-card.essential {
  border-color: var(--accent);
}
.decision-card.helpful {
  border-color: var(--warning);
}
.decision-card.noise {
  border-color: var(--red);
}
.decision-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.decision-card.essential h3 {
  color: var(--accent);
}
.decision-card.helpful h3 {
  color: var(--warning);
}
.decision-card.noise h3 {
  color: var(--red);
}
.decision-card p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* Workflow steps (basics/5) */
.workflow-steps {
  margin: 28px 0;
}
.workflow-step {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  position: relative;
  padding-left: 72px;
}
.workflow-step::before {
  content: attr(data-step);
  position: absolute;
  left: 24px;
  top: 24px;
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: #000;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}
.workflow-step h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.workflow-step p {
  margin-bottom: 0;
  font-size: 0.95rem;
}
.series-recap {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 28px 0;
}
.series-recap h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.series-recap ol {
  margin: 0 0 0 20px;
}
.series-recap li {
  margin-bottom: 6px;
}

/* Comparison grid (practical/2) */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 28px 0;
}
.comparison-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.comparison-card.bad {
  border-color: var(--red);
}
.comparison-card.good {
  border-color: var(--accent);
}
.comparison-card h3 {
  font-size: 0.9rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.comparison-card.bad h3 {
  color: var(--red);
}
.comparison-card.good h3 {
  color: var(--accent);
}
.comparison-card p {
  font-size: 0.9rem;
  margin-bottom: 0;
  font-family: "JetBrains Mono", monospace;
}

@media (max-width: 600px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  .model-comparison {
    grid-template-columns: 1fr;
  }
}

/* Technique card (practical/3) */
.technique-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 16px 0;
}
.technique-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--accent);
}
.technique-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Model comparison (practical/4) */
.model-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 28px 0;
}
.model-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.model-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.model-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Feature card (practical/5) */
.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 16px 0;
}
.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--accent);
}
.feature-card p {
  margin-bottom: 12px;
  font-size: 0.95rem;
}
.feature-card ul {
  margin: 0 0 0 20px;
}
.feature-card li {
  font-size: 0.9rem;
  margin-bottom: 4px;
}

/* Highlight box warning variant (practical/4) */
.highlight-box.warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
}
.highlight-box.warning p {
  color: var(--warning);
}

/* Highlight box danger variant (practical/6) */
.highlight-box.danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
}
.highlight-box.danger p {
  color: var(--red);
}

/* Warning signs (practical/6) */
.warning-signs {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 28px 0;
}
.warning-signs h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--warning);
}
.warning-signs ul {
  margin: 0 0 0 20px;
}
.warning-signs li {
  margin-bottom: 8px;
}

/* Solution card (practical/6) */
.solution-card {
  background: var(--bg-secondary);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 24px;
  margin: 16px 0;
}
.solution-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--accent);
}
.solution-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* System card (practical/7) */
.system-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 16px 0;
}
.system-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.system-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Casual mode toggle */
.casual-toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}
.casual-toggle:hover {
  border-color: var(--accent);
}
.casual-toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--border);
  border-radius: 12px;
  transition: background 0.2s;
}
.casual-toggle-switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: var(--text-primary);
  border-radius: 50%;
  transition: transform 0.2s;
}
.casual-toggle.active .casual-toggle-switch {
  background: var(--accent);
}
.casual-toggle.active .casual-toggle-switch::after {
  transform: translateX(20px);
  background: #000;
}
.casual-toggle-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.casual-toggle.active .casual-toggle-label {
  color: var(--accent);
}

/* Casual/Formal content visibility */
.lesson-content [data-mode="casual"] {
  display: none;
}
.lesson-content [data-mode="formal"] {
  display: block;
}
.lesson-content.casual-mode [data-mode="casual"] {
  display: block;
}
.lesson-content.casual-mode [data-mode="formal"] {
  display: none;
}

/* Casual content styling */
.casual-content {
  background: linear-gradient(
    135deg,
    rgba(34, 197, 94, 0.05),
    rgba(34, 197, 94, 0.02)
  );
  border-left: 3px solid var(--accent);
  padding: 20px 24px;
  margin: 20px 0;
  border-radius: 0 8px 8px 0;
}
.casual-content p {
  font-size: 1rem;
}
.casual-content code {
  background: rgba(34, 197, 94, 0.15);
}