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

.lesson-content .options {
  list-style: none !important;
  padding-left: 0 !important;
  margin: 0 !important;
}

.lesson-content .options li {
  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 .options li:hover {
  background: #22201d !important;
  border-color: #3a3632 !important;
}

.lesson-content .options li.reveal-correct {
  border-color: #6e9468 !important;
  background: #1a1816 !important;
}

.lesson-content .options li.selected-correct {
  background: #1a2018 !important;
  border-color: #6e9468 !important;
  color: #6e9468 !important;
}

.lesson-content .options li.selected-wrong {
  background: #201816 !important;
  border-color: #c45b54 !important;
  color: #c45b54 !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,
.lesson-content .feedback {
  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),
.lesson-content .explanation.show,
.lesson-content .feedback.show {
  display: block !important;
}

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

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

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

.lesson-content .explanation.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;
}

html,
body,
#lesson-root {
  background: #f7f3eb !important;
  color: #2f2a24 !important;
}

#lesson-root {
  color: #2f2a24 !important;
}

nav[aria-label="레슨 브레드크럼"],
nav[aria-label="레슨 탐색"],
nav[aria-label="레슨 내비게이션"],
nav[aria-label="Lesson navigation"] {
  background: #f7f3eb !important;
  border-color: #d8d0c2 !important;
}

.nav-crumb,
.lesson-nav-btn,
nav[aria-label="레슨 브레드크럼"] span,
nav[aria-label="레슨 탐색"] span,
nav[aria-label="레슨 내비게이션"] span {
  color: #4f463c !important;
}

.lesson-content,
.lesson-content p,
.lesson-content li,
.lesson-content td {
  color: #2f2a24 !important;
}

.lesson-content .header,
.lesson-content header,
.lesson-content .phase-card,
.lesson-content .diagram-wrap,
.lesson-content .quiz-section,
.lesson-content .quiz-container,
.lesson-content .quiz-wrap,
.lesson-content section.quiz,
.lesson-content .quiz.section,
.lesson-content .quiz,
.lesson-content .callout.info,
.lesson-content .callout.tip,
.lesson-content .callout.warn,
.lesson-content .callout.warning,
.lesson-content .callout.error,
.lesson-content .callout.danger,
.lesson-content th,
.lesson-content pre,
.lesson-content code {
  background: #fffdf9 !important;
}

.lesson-content .header,
.lesson-content header,
.lesson-content .section-title,
.lesson-content .phase-grid,
.lesson-content .diagram-wrap,
.lesson-content table,
.lesson-content th,
.lesson-content td,
.lesson-content .quiz-section,
.lesson-content .quiz-q,
.lesson-content .quiz-question,
.lesson-content .q-block,
.lesson-content .option-label,
.lesson-content .quiz-option,
.lesson-content .options li,
.lesson-content .callout,
.lesson-content pre,
.lesson-content code,
.lesson-nav-btn {
  border-color: #d8d0c2 !important;
}

.lesson-content h1,
.lesson-content h2,
.lesson-content h3,
.lesson-content h4,
.lesson-content .header h1,
.lesson-content header h1,
.lesson-content .section-title,
.lesson-content .quiz-q strong,
.lesson-content .question-text,
.lesson-content .quiz-question > p,
.lesson-content .q-text,
.lesson-content .question {
  color: #1f1b17 !important;
}

.lesson-content .header p,
.lesson-content header p,
.lesson-content .phase-card p,
.lesson-content .callout-label {
  color: #756b5f !important;
}

.lesson-content code {
  color: #9b5b2e !important;
}

.lesson-content pre code {
  color: #2f2a24 !important;
}

.lesson-content .option-label:hover,
.lesson-content .quiz-option:hover,
.lesson-content .options li:hover,
.lesson-nav-btn:hover {
  background: #f1ebe0 !important;
  border-color: #c9bead !important;
}

.lesson-content .qnum,
.lesson-content .q-num,
.lesson-content .opt-letter {
  background: #efe6d8 !important;
  border-color: #d8d0c2 !important;
  color: #9b5b2e !important;
}

.lesson-content .lesson-tag {
  background: #9b5b2e !important;
  color: #fffdf9 !important;
}

:root {
  --lesson-viewer-backdrop: rgba(247, 243, 235, 0.84);
  --lesson-viewer-surface: #fffdf9;
  --lesson-viewer-surface-soft: #fbf6ed;
  --lesson-viewer-border: #d8d0c2;
  --lesson-viewer-border-strong: #c9bead;
  --lesson-viewer-text: #1f1b17;
  --lesson-viewer-text-muted: #756b5f;
  --lesson-viewer-accent: #9b5b2e;
  --lesson-viewer-hover-shadow: 0 12px 28px rgba(79, 70, 60, 0.08);
  --lesson-viewer-dialog-shadow: 0 24px 80px rgba(79, 70, 60, 0.2);
}

html.mermaid-viewer-open,
body.mermaid-viewer-open {
  overflow: hidden !important;
}

.lesson-content .mermaid-zoomable {
  position: relative;
  cursor: zoom-in;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.lesson-content .mermaid-zoomable:hover,
.lesson-content .mermaid-zoomable:focus-visible {
  border-color: var(--lesson-viewer-border-strong) !important;
  box-shadow: var(--lesson-viewer-hover-shadow);
}

.lesson-content .mermaid-zoomable:focus-visible {
  outline: 2px solid rgba(155, 91, 46, 0.28);
  outline-offset: 3px;
}

.lesson-content .mermaid-zoomable::after {
  content: attr(data-mermaid-viewer-label);
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.24rem 0.6rem;
  border: 1px solid var(--lesson-viewer-border);
  border-radius: 999px;
  background: rgba(255, 253, 249, 0.96);
  color: var(--lesson-viewer-accent);
  font-family: JetBrains Mono, monospace;
  font-size: 10px;
  letter-spacing: 0.04em;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
  pointer-events: none;
}

.lesson-content .mermaid-zoomable:hover::after,
.lesson-content .mermaid-zoomable:focus-visible::after {
  opacity: 1;
  transform: translateY(0);
}

.mermaid-viewer {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.mermaid-viewer[hidden] {
  display: none !important;
}

.mermaid-viewer__backdrop {
  position: absolute;
  inset: 0;
  background: var(--lesson-viewer-backdrop);
  backdrop-filter: blur(8px);
}

.mermaid-viewer__dialog {
  position: relative;
  width: min(96vw, 1280px);
  max-height: min(88vh, 980px);
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  background: var(--lesson-viewer-surface);
  border: 1px solid var(--lesson-viewer-border);
  border-radius: 3px;
  box-shadow: var(--lesson-viewer-dialog-shadow);
  overflow: hidden;
  opacity: 0;
  transform: translateY(12px) scale(0.985);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.mermaid-viewer.is-open .mermaid-viewer__dialog {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.mermaid-viewer__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem 0.85rem;
  border-bottom: 1px solid var(--lesson-viewer-border);
  background: var(--lesson-viewer-surface);
}

.mermaid-viewer__eyebrow {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--lesson-viewer-accent);
  font-family: JetBrains Mono, monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mermaid-viewer__title {
  margin: 0;
  color: var(--lesson-viewer-text);
  font-family: Space Grotesk, sans-serif;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.25;
}

.mermaid-viewer__close {
  flex: 0 0 auto;
  border: 1px solid var(--lesson-viewer-border);
  border-radius: 2px;
  background: var(--lesson-viewer-surface-soft);
  color: var(--lesson-viewer-text-muted);
  font-family: JetBrains Mono, monospace;
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 0.42rem 0.72rem;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.mermaid-viewer__close:hover,
.mermaid-viewer__close:focus-visible {
  border-color: var(--lesson-viewer-border-strong);
  background: var(--lesson-viewer-surface);
  color: var(--lesson-viewer-accent);
  outline: none;
}

.mermaid-viewer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  padding: 0.75rem 1.25rem;
  background: var(--lesson-viewer-surface-soft);
  border-bottom: 1px solid var(--lesson-viewer-border);
  color: var(--lesson-viewer-text-muted);
  font-family: JetBrains Mono, monospace;
  font-size: 11px;
}

.mermaid-viewer__canvas {
  overflow: auto;
  padding: 1.25rem;
  background: var(--lesson-viewer-surface-soft);
}

.mermaid-viewer__figure {
  width: fit-content;
  min-width: 100%;
  margin: 0 auto;
  padding: 1rem;
  border: 1px solid var(--lesson-viewer-border);
  border-radius: 3px;
  background: var(--lesson-viewer-surface);
}

.mermaid-viewer__figure svg {
  display: block;
  max-width: none !important;
  height: auto !important;
  margin: 0 auto;
}

@media (max-width: 720px) {
  .mermaid-viewer {
    padding: 0.75rem;
  }

  .lesson-content .mermaid-zoomable::after {
    top: 0.75rem;
    right: 0.75rem;
  }

  .mermaid-viewer__header,
  .mermaid-viewer__meta,
  .mermaid-viewer__canvas {
    padding-left: 0.9rem;
    padding-right: 0.9rem;
  }

  .mermaid-viewer__figure {
    padding: 0.75rem;
  }
}