/* -- Scoped CSS variables (tutorial-specific palette) ------------------- */
    .dt-page {
      --bg:              #0d1117;
      --surface:         #161b22;
      --surface2:        #1c2330;
      --border:          #30363d;
      --accent:          #58a6ff;
      --accent2:         #3fb950;
      --accent3:         #f78166;
      --accent4:         #e3b341;
      --text:            #e6edf3;
      --text-muted:      #8b949e;
      --text-dim:        #484f58;
      --code-bg:         #0d1117;
      --inline-code-bg:  #1c2330;
    }

    /* -- Reset (scoped) ----------------------------------------------------- */
    .dt-page * {
      box-sizing: border-box;
    }

    /* -- Page wrapper ------------------------------------------------------- */
    .dt-page {
      background: var(--bg);
      color: var(--text);
      font-family: 'Source Serif 4', Georgia, serif;
      font-size: 17px;
      line-height: 1.75;
    }

    /* -- Hero --------------------------------------------------------------- */
    .dt-page .hero {
      max-width: 800px;
      margin: 0 auto;
      padding: 72px 32px 48px;
      border-bottom: 1px solid var(--border);
    }

    .dt-page .hero-kicker {
      font-family: 'JetBrains Mono', monospace;
      font-size: 11px;
      color: var(--accent);
      letter-spacing: 0.12em;
      text-transform: uppercase;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .dt-page .hero-kicker::before {
      content: '';
      display: inline-block;
      width: 20px;
      height: 1px;
      background: var(--accent);
    }

    .dt-page .hero h1 {
      font-family: 'Playfair Display', Georgia, serif;
      font-size: clamp(32px, 5vw, 52px);
      font-weight: 700;
      line-height: 1.15;
      margin-bottom: 24px;
      color: var(--text);
    }

    .dt-page .hero h1 em {
      font-style: italic;
      color: var(--accent);
    }

    .dt-page .hero-meta {
      font-family: 'JetBrains Mono', monospace;
      font-size: 12px;
      color: var(--text-muted);
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
      margin-bottom: 28px;
    }

    .dt-page .hero-deck {
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.65;
      max-width: 640px;
      font-weight: 300;
    }

    /* -- Layout grid -------------------------------------------------------- */
    .dt-page .layout {
      display: grid;
      grid-template-columns: 220px 1fr;
      max-width: 1100px;
      margin: 0 auto;
      gap: 0;
    }

    /* -- Sidebar TOC -------------------------------------------------------- */
    .dt-page .toc {
      border-right: 1px solid var(--border);
      padding: 40px 24px 40px 32px;
      position: sticky;
      top: 4rem;
      height: calc(100vh - 4rem);
      overflow-y: auto;
      scrollbar-width: thin;
      scrollbar-color: var(--border) transparent;
    }

    .dt-page .toc-label {
      font-family: 'JetBrains Mono', monospace;
      font-size: 10px;
      color: var(--text-dim);
      letter-spacing: 0.12em;
      text-transform: uppercase;
      margin-bottom: 16px;
    }

    .dt-page .toc ol {
      list-style: none;
      counter-reset: toc;
      padding: 0;
      margin: 0;
    }

    .dt-page .toc ol li {
      counter-increment: toc;
      margin-bottom: 8px;
    }

    .dt-page .toc ol li a {
      font-family: 'JetBrains Mono', monospace;
      font-size: 11.5px;
      color: var(--text-muted);
      text-decoration: none;
      display: flex;
      gap: 8px;
      align-items: flex-start;
      transition: color 0.2s;
      line-height: 1.4;
    }

    .dt-page .toc ol li a::before {
      content: counter(toc, decimal-leading-zero);
      color: var(--text-dim);
      flex-shrink: 0;
      font-size: 10px;
      margin-top: 1px;
    }

    .dt-page .toc ol li a:hover { color: var(--accent); }

    /* -- Main content ------------------------------------------------------- */
    .dt-page .content {
      padding: 56px 56px 80px 56px;
      max-width: 760px;
    }

    /* -- Sections ----------------------------------------------------------- */
    .dt-page .section {
      margin-bottom: 64px;
      animation: dtFadeUp 0.6s ease both;
    }

    @keyframes dtFadeUp {
      from { opacity: 0; transform: translateY(16px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    .dt-page .section-number {
      font-family: 'JetBrains Mono', monospace;
      font-size: 11px;
      color: var(--text-dim);
      letter-spacing: 0.08em;
      margin-bottom: 8px;
    }

    .dt-page .section h2 {
      font-family: 'Playfair Display', Georgia, serif;
      font-size: 28px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 20px;
      line-height: 1.2;
    }

    .dt-page .section h3 {
      font-family: 'Source Serif 4', serif;
      font-size: 18px;
      font-weight: 600;
      color: var(--accent);
      margin: 32px 0 12px;
    }

    .dt-page .section p {
      color: #cdd5e0;
      margin-bottom: 16px;
    }

    /* -- Callout boxes ------------------------------------------------------ */
    .dt-page .callout {
      border-left: 3px solid var(--accent2);
      background: rgba(63, 185, 80, 0.06);
      padding: 16px 20px;
      border-radius: 0 6px 6px 0;
      margin: 24px 0;
      font-size: 15px;
    }

    .dt-page .callout.warning {
      border-left-color: var(--accent4);
      background: rgba(227, 179, 65, 0.06);
    }

    .dt-page .callout.clinical {
      border-left-color: var(--accent3);
      background: rgba(247, 129, 102, 0.06);
    }

    .dt-page .callout-label {
      font-family: 'JetBrains Mono', monospace;
      font-size: 10px;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      margin-bottom: 6px;
      color: var(--accent2);
    }

    .dt-page .callout.warning .callout-label { color: var(--accent4); }
    .dt-page .callout.clinical .callout-label { color: var(--accent3); }

    /* -- Code blocks -------------------------------------------------------- */
    .dt-page .code-block {
      background: var(--code-bg);
      border: 1px solid var(--border);
      border-radius: 8px;
      overflow: hidden;
      margin: 24px 0;
      font-size: 13.5px;
    }

    .dt-page .code-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 16px;
      background: var(--surface2);
      border-bottom: 1px solid var(--border);
    }

    .dt-page .code-lang {
      font-family: 'JetBrains Mono', monospace;
      font-size: 11px;
      color: var(--accent2);
      letter-spacing: 0.05em;
    }

    .dt-page .code-title {
      font-family: 'JetBrains Mono', monospace;
      font-size: 11px;
      color: var(--text-muted);
    }

    .dt-page .code-block pre {
      padding: 20px;
      overflow-x: auto;
      scrollbar-width: thin;
      scrollbar-color: var(--border) transparent;
      margin: 0;
    }

    .dt-page .code-block code {
      font-family: 'JetBrains Mono', monospace;
      line-height: 1.65;
      color: #e6edf3;
      background: transparent;
      border: none;
      padding: 0;
      font-size: inherit;
    }

    /* -- Syntax highlight tokens -------------------------------------------- */
    .dt-page .kw  { color: #ff7b72; }
    .dt-page .fn  { color: #d2a8ff; }
    .dt-page .str { color: #a5d6ff; }
    .dt-page .cm  { color: #8b949e; font-style: italic; }
    .dt-page .num { color: #f2cc60; }
    .dt-page .cls { color: #ffa657; }
    .dt-page .var { color: #e6edf3; }
    .dt-page .op  { color: #ff7b72; }
    .dt-page .imp { color: #79c0ff; }

    /* -- Comparison table --------------------------------------------------- */
    .dt-page .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
      margin: 24px 0;
    }

    .dt-page .compare-table th {
      font-family: 'JetBrains Mono', monospace;
      font-size: 11px;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      padding: 10px 14px;
      border-bottom: 1px solid var(--border);
      text-align: left;
      background: var(--surface);
    }

    .dt-page .compare-table td {
      padding: 12px 14px;
      border-bottom: 1px solid var(--border);
      color: #cdd5e0;
      vertical-align: top;
    }

    .dt-page .compare-table tr:hover td { background: rgba(88, 166, 255, 0.04); }

    .dt-page .badge {
      font-family: 'JetBrains Mono', monospace;
      font-size: 10px;
      padding: 2px 7px;
      border-radius: 4px;
      font-weight: 600;
    }

    .dt-page .badge.good { background: rgba(63, 185, 80, 0.2);  color: var(--accent2); }
    .dt-page .badge.bad  { background: rgba(247, 129, 102, 0.2); color: var(--accent3); }
    .dt-page .badge.ok   { background: rgba(227, 179, 65, 0.2);  color: var(--accent4); }

    /* -- Pipeline diagram --------------------------------------------------- */
    .dt-page .pipeline {
      display: flex;
      align-items: center;
      gap: 4px;
      margin: 28px 0;
      flex-wrap: wrap;
    }

    .dt-page .pipe-step {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 10px 14px;
      font-family: 'JetBrains Mono', monospace;
      font-size: 12px;
      color: var(--text-muted);
      text-align: center;
      flex: 1;
      min-width: 100px;
    }

    .dt-page .pipe-step.highlight {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(88, 166, 255, 0.08);
    }

    .dt-page .pipe-arrow {
      color: var(--text-dim);
      font-size: 18px;
      flex-shrink: 0;
      padding: 0 2px;
    }

    /* -- Inline code (override DWC global) --------------------------------- */
    .dt-page code {
      font-family: 'JetBrains Mono', monospace;
      font-size: 13px;
      background: var(--inline-code-bg);
      color: var(--accent);
      padding: 2px 6px;
      border-radius: 4px;
      border: 1px solid var(--border);
    }

    /* -- Feature grid ------------------------------------------------------- */
    .dt-page .feature-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin: 24px 0;
    }

    .dt-page .feature-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 16px;
      font-size: 14px;
    }

    .dt-page .feature-card .icon {
      font-size: 20px;
      margin-bottom: 8px;
    }

    .dt-page .feature-card strong {
      display: block;
      font-family: 'JetBrains Mono', monospace;
      font-size: 12px;
      color: var(--accent2);
      margin-bottom: 4px;
    }

    .dt-page .feature-card p {
      font-size: 13px;
      margin: 0;
      color: var(--text-muted);
    }

    /* -- Step counter ------------------------------------------------------- */
    .dt-page .steps { margin: 24px 0; }

    .dt-page .step {
      display: flex;
      gap: 16px;
      margin-bottom: 20px;
    }

    .dt-page .step-num {
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--surface2);
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: 'JetBrains Mono', monospace;
      font-size: 12px;
      color: var(--accent);
      margin-top: 2px;
    }

    .dt-page .step-body strong {
      font-family: 'Source Serif 4', serif;
      font-weight: 600;
      font-size: 15px;
      display: block;
      margin-bottom: 4px;
      color: var(--text);
    }

    .dt-page .step-body p {
      font-size: 14px;
      color: var(--text-muted);
      margin: 0;
    }

    /* -- Responsive --------------------------------------------------------- */
    @media (max-width: 768px) {
      .dt-page .layout          { grid-template-columns: 1fr; }
      .dt-page .toc             { display: none; }
      .dt-page .content         { padding: 32px 24px; }
      .dt-page .feature-grid    { grid-template-columns: 1fr; }
      .dt-page .pipeline        { flex-direction: column; }
      .dt-page .pipe-arrow      { transform: rotate(90deg); }
    }