.lesson-content {
  font-size: 15px;
  line-height: 1.75;
}

.lesson-content .header,
.lesson-content header {
  background: #1a1816 !important;
  border-bottom: 1px solid #272421 !important;
  padding: 2.5rem 0 2rem !important;
  border-radius: 3px !important;
  margin-bottom: 2rem;
}

.lesson-content .header h1,
.lesson-content header h1 {
  font-family: Space Grotesk, sans-serif !important;
  font-size: clamp(1.4rem, 3vw, 2rem) !important;
  font-weight: 600 !important;
  color: #e6dfd6 !important;
  line-height: 1.25 !important;
}

.lesson-content .header p,
.lesson-content header p {
  color: #5c564f !important;
  font-size: 14px !important;
}

.lesson-content .lesson-tag {
  background: #c47a50 !important;
  color: #141211 !important;
  font-family: JetBrains Mono, monospace !important;
  font-size: 10px !important;
  letter-spacing: 0.1em !important;
  border-radius: 2px !important;
  padding: 2px 8px !important;
}

.lesson-content .section-title {
  font-family: Space Grotesk, sans-serif !important;
  font-size: 18px !important;
  font-weight: 600 !important;
  color: #e6dfd6 !important;
  border-bottom: 1px solid #272421 !important;
  padding-bottom: 0.5rem !important;
  margin: 2.5rem 0 1.25rem !important;
}

.lesson-content .section-title .num,
.lesson-content .section-title .icon {
  color: #c47a50 !important;
  font-family: JetBrains Mono, monospace !important;
  font-size: 13px !important;
}

.lesson-content p {
  color: #b8b0a4;
  margin-bottom: 1rem;
}

.lesson-content h2,
.lesson-content h3,
.lesson-content h4 {
  font-family: Space Grotesk, sans-serif !important;
  color: #e6dfd6 !important;
}

.lesson-content h2 {
  font-size: 18px;
  margin: 2rem 0 0.75rem;
}

.lesson-content h3 {
  font-size: 15px;
  margin: 1.5rem 0 0.5rem;
}

.lesson-content h4 {
  font-size: 13px;
  margin: 1.25rem 0 0.5rem;
  color: #b8b0a4 !important;
}

.lesson-content code {
  font-family: JetBrains Mono, monospace !important;
  font-size: 12px !important;
  background: #1a1816 !important;
  color: #c47a50 !important;
  padding: 1px 5px !important;
  border-radius: 2px !important;
  border: 1px solid #272421 !important;
}

.lesson-content pre {
  background: #1a1816 !important;
  border: 1px solid #272421 !important;
  border-radius: 3px !important;
  padding: 1.25rem !important;
  overflow-x: auto !important;
  margin: 1.25rem 0 !important;
}

.lesson-content pre code {
  background: none !important;
  border: none !important;
  padding: 0 !important;
  color: #b8b0a4 !important;
  font-size: 12px !important;
  line-height: 1.7 !important;
}

.lesson-content pre .tag {
  display: block !important;
  margin-bottom: 0.55rem !important;
  color: #7d9ab8 !important;
  font-family: JetBrains Mono, monospace !important;
  font-size: 11px !important;
  letter-spacing: 0.02em !important;
}

.lesson-content pre .keyword {
  color: #c47a50 !important;
  font-weight: 600 !important;
}

.lesson-content pre .type {
  color: #7d9ab8 !important;
}

.lesson-content pre .comment {
  color: #6e9468 !important;
}

.lesson-content pre .fn {
  color: #b8965e !important;
}

.lesson-content pre .str {
  color: #d28b7a !important;
}

.lesson-content pre .num {
  color: #b8965e !important;
}

.lesson-content .callout {
  border-radius: 2px !important;
  padding: 1rem 1.25rem !important;
  margin: 1.25rem 0 !important;
  font-size: 13px !important;
  border-left-width: 3px !important;
  border-left-style: solid !important;
}

.lesson-content .callout.info {
  background: #1a1816 !important;
  border-color: #7d9ab8 !important;
  color: #b8b0a4 !important;
}

.lesson-content .callout.tip {
  background: #1a1816 !important;
  border-color: #6e9468 !important;
  color: #b8b0a4 !important;
}

.lesson-content .callout.warn,
.lesson-content .callout.warning {
  background: #1a1816 !important;
  border-color: #b8965e !important;
  color: #b8b0a4 !important;
}

.lesson-content .callout.error,
.lesson-content .callout.danger {
  background: #1a1816 !important;
  border-color: #c45b54 !important;
  color: #b8b0a4 !important;
}

.lesson-content .callout-label {
  font-family: JetBrains Mono, monospace !important;
  font-size: 10px !important;
  letter-spacing: 0.1em !important;
  text-transform: uppercase !important;
  font-weight: 700 !important;
  margin-bottom: 0.5rem !important;
  color: #5c564f !important;
}

.lesson-content .phase-grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)) !important;
  gap: 1px !important;
  border: 1px solid #272421 !important;
  border-radius: 3px !important;
  overflow: hidden !important;
  margin: 1.25rem 0 !important;
}

.lesson-content .phase-card {
  background: #1a1816 !important;
  padding: 1rem !important;
  border: none !important;
  border-radius: 0 !important;
}

.lesson-content .phase-card h4,
.lesson-content .phase-card h3 {
  color: #e6dfd6 !important;
  font-size: 13px !important;
  margin-bottom: 0.4rem !important;
}

.lesson-content .phase-card p {
  font-size: 12px !important;
  color: #5c564f !important;
  margin-bottom: 0 !important;
}

.lesson-content .phase-num {
  font-family: JetBrains Mono, monospace !important;
  font-size: 10px !important;
  color: #c47a50 !important;
  letter-spacing: 0.08em !important;
  text-transform: uppercase !important;
  margin-bottom: 0.4rem !important;
}

.lesson-content .phase-card.p1,
.lesson-content .phase-card.p2,
.lesson-content .phase-card.p3,
.lesson-content .phase-card.p4,
.lesson-content .phase-card.p5,
.lesson-content .phase-card.p6 {
  background: #1a1816 !important;
  border-top: 2px solid #272421 !important;
}

.lesson-content .phase-card.p1 {
  border-top-color: #c47a50 !important;
}

.lesson-content .phase-card.p2 {
  border-top-color: #6e9468 !important;
}

.lesson-content .phase-card.p3 {
  border-top-color: #7d9ab8 !important;
}

.lesson-content .phase-card.p4 {
  border-top-color: #b8965e !important;
}

.lesson-content .phase-card.p5 {
  border-top-color: #8a7a6e !important;
}

.lesson-content .phase-card.p6 {
  border-top-color: #6e8a9a !important;
}

.lesson-content .diagram-wrap {
  background: #1a1816 !important;
  border: 1px solid #272421 !important;
  border-radius: 3px !important;
  padding: 1.5rem !important;
  margin: 1.25rem 0 !important;
  overflow-x: auto !important;
}

.lesson-content table {
  width: 100% !important;
  border-collapse: collapse !important;
  font-size: 13px !important;
  margin: 1.25rem 0 !important;
}

.lesson-content th {
  background: #1a1816 !important;
  color: #e6dfd6 !important;
  font-family: JetBrains Mono, monospace !important;
  font-size: 11px !important;
  letter-spacing: 0.06em !important;
  text-transform: uppercase !important;
  padding: 0.6rem 0.875rem !important;
  border-bottom: 1px solid #3a3632 !important;
  text-align: left !important;
}

.lesson-content td {
  padding: 0.6rem 0.875rem !important;
  border-bottom: 1px solid #272421 !important;
  color: #b8b0a4 !important;
  vertical-align: top !important;
}

.lesson-content tr:last-child td {
  border-bottom: none !important;
}

.lesson-content .quiz-section,
.lesson-content .quiz-container,
.lesson-content .quiz-wrap,
.lesson-content section.quiz,
.lesson-content .quiz.section {
  background: #1a1816 !important;
  border: 1px solid #272421 !important;
  border-radius: 3px !important;
  padding: 1.5rem !important;
  margin: 2rem 0 !important;
}

.lesson-content .quiz-q,
.lesson-content .quiz-question {
  margin-bottom: 1.5rem !important;
  padding-bottom: 1.5rem !important;
  border-bottom: 1px solid #272421 !important;
}

.lesson-content .quiz-q:last-of-type,
.lesson-content .quiz-question:last-of-type {
  border-bottom: none !important;
}

.lesson-content .quiz-q strong,
.lesson-content .question-text,
.lesson-content .quiz-question > p,
.lesson-content .q-text {
  color: #e6dfd6 !important;
  font-size: 14px !important;
  display: block !important;
  margin-bottom: 0.75rem !important;
}

.lesson-content .option-label,
.lesson-content .quiz-option {
  display: flex !important;
  align-items: flex-start !important;
  gap: 0.5rem !important;
  padding: 0.5rem 0.75rem !important;
  margin: 0.3rem 0 !important;
  border: 1px solid #272421 !important;
  border-radius: 2px !important;
  cursor: pointer !important;
  font-size: 13px !important;
  color: #b8b0a4 !important;
  transition: border-color 0.15s, background 0.15s !important;
}

.lesson-content .option-label:hover,
.lesson-content .quiz-option:hover {
  background: #22201d !important;
  border-color: #3a3632 !important;
}

.lesson-content .option-label.reveal-correct,
.lesson-content .quiz-option.reveal-correct {
  border-color: #6e9468 !important;
  background: #1a1816 !important;
}

.lesson-content .option-label.selected-correct,
.lesson-content .quiz-option.selected-correct {
  background: #1a2018 !important;
  border-color: #6e9468 !important;
  color: #6e9468 !important;
}

.lesson-content .option-label.selected-wrong,
.lesson-content .quiz-option.selected-wrong {
  background: #201816 !important;
  border-color: #c45b54 !important;
  color: #c45b54 !important;
}

.lesson-content .qnum,
.lesson-content .q-num {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  width: 1.35rem !important;
  height: 1.35rem !important;
  margin-right: 0.45rem !important;
  border-radius: 999px !important;
  background: #22201d !important;
  border: 1px solid #3a3632 !important;
  color: #c47a50 !important;
  font-family: JetBrains Mono, monospace !important;
  font-size: 10px !important;
  line-height: 1 !important;
}

.lesson-content .opt-letter {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  min-width: 1.35rem !important;
  height: 1.35rem !important;
  margin-right: 0.45rem !important;
  border-radius: 999px !important;
  background: #22201d !important;
  border: 1px solid #3a3632 !important;
  color: #c47a50 !important;
  font-family: JetBrains Mono, monospace !important;
  font-size: 10px !important;
  line-height: 1 !important;
  flex: 0 0 auto !important;
}

.lesson-content .quiz-feedback,
.lesson-content .quiz-explain {
  display: none;
  font-size: 12px !important;
  margin-top: 0.5rem !important;
  padding: 0.5rem 0.75rem !important;
  border-radius: 2px !important;
}

.lesson-content .quiz-feedback.show,
.lesson-content .quiz-explain.show,
.lesson-content .quiz-explain:not(:empty) {
  display: block !important;
}

.lesson-content .quiz-feedback.correct {
  background: #1a2018 !important;
  color: #6e9468 !important;
  border: 1px solid #6e9468 !important;
}

.lesson-content .quiz-feedback.wrong {
  background: #201816 !important;
  color: #c45b54 !important;
  border: 1px solid #c45b54 !important;
}

.lesson-content .quiz-explain.correct {
  background: #1a2018 !important;
  color: #6e9468 !important;
  border: 1px solid #6e9468 !important;
}

.lesson-content .quiz-explain.wrong {
  background: #201816 !important;
  color: #c45b54 !important;
  border: 1px solid #c45b54 !important;
}

.lesson-content .check-btn,
.lesson-content button[onclick] {
  background: #22201d !important;
  color: #b8b0a4 !important;
  border: 1px solid #3a3632 !important;
  border-radius: 2px !important;
  padding: 0.4rem 1rem !important;
  font-family: JetBrains Mono, monospace !important;
  font-size: 11px !important;
  letter-spacing: 0.04em !important;
  cursor: pointer !important;
  margin-top: 0.75rem !important;
  transition: background 0.15s, color 0.15s !important;
}

.lesson-content .check-btn:hover,
.lesson-content button[onclick]:hover {
  background: #2a2824 !important;
  color: #e6dfd6 !important;
  border-color: #c47a50 !important;
}

.lesson-content .check-btn:disabled,
.lesson-content button[onclick]:disabled {
  opacity: 0.5 !important;
  cursor: not-allowed !important;
}

.lesson-content .quiz-score {
  display: none;
  text-align: center;
  padding: 1.5rem;
  border-top: 1px solid #272421;
  margin-top: 1rem;
}

.lesson-content .quiz-score.show {
  display: block !important;
}

.lesson-content .score-big {
  font-family: JetBrains Mono, monospace !important;
  font-size: 2.5rem !important;
  font-weight: 700 !important;
  color: #c47a50 !important;
  display: block !important;
  margin-bottom: 0.5rem !important;
}

.lesson-content .file-chip,
.lesson-content .source-chip {
  display: inline-block !important;
  font-family: JetBrains Mono, monospace !important;
  font-size: 11px !important;
  background: #1a1816 !important;
  border: 1px solid #272421 !important;
  border-radius: 2px !important;
  padding: 1px 6px !important;
  color: #7d9ab8 !important;
  margin: 1px !important;
}

.lesson-content a {
  color: #c47a50 !important;
  text-decoration: underline !important;
  text-decoration-color: #c47a5040 !important;
}

.lesson-content a:hover {
  text-decoration-color: #c47a50 !important;
}

.lesson-content ul,
.lesson-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.lesson-content li {
  margin-bottom: 0.35rem;
  color: #b8b0a4;
  font-size: 14px;
}

.lesson-content strong {
  color: #e6dfd6;
  font-weight: 600;
}

.lesson-content em {
  color: #b8965e;
  font-style: italic;
}

.lesson-content hr {
  border: none !important;
  border-top: 1px solid #272421 !important;
  margin: 2rem 0 !important;
}

.nav-crumb:hover {
  color: #b8b0a4 !important;
}

.lesson-nav-btn:hover {
  border-color: #3a3632 !important;
  background: #22201d !important;
}

.lesson-content .mermaid svg {
  max-width: 100%;
}

.game-back-link {
  display: none !important;
}

html,
body {
  overflow: auto !important;
  height: auto !important;
}