const pptxgen = require("pptxgenjs");

const pres = new pptxgen();
pres.layout = "LAYOUT_WIDE"; // 13.3" x 7.5"
pres.title = "Common Cutaneous Bacterial Infections";
pres.author = "Dermatology";

// ─── COLOR PALETTE ────────────────────────────────────────────────────────────
// Deep teal/navy medical theme
const C = {
  darkBg:      "0D2B45",   // dark navy – title/section slides
  midBg:       "1A4A6E",   // mid-navy – section dividers
  accent:      "2AAFB8",   // teal accent
  accentLight: "5BC8D0",   // lighter teal
  gold:        "E8B84B",   // gold highlight
  white:       "FFFFFF",
  offWhite:    "F0F6FA",
  textDark:    "0D2B45",
  textMid:     "2A4A65",
  lightGray:   "DDE8F0",
  superBg:     "E8F4F5",   // superficial – light teal tint
  follBg:      "FFF3E0",   // follicular – warm amber tint
  dermBg:      "F3E5F5",   // dermal – lavender tint
  superAccent: "2AAFB8",
  follAccent:  "E8930A",
  dermAccent:  "8E44AD",
};

// ─── HELPERS ─────────────────────────────────────────────────────────────────

function titleSlide(slide) {
  // dark background
  slide.background = { color: C.darkBg };
}

function addDividerBar(slide, color = C.accent) {
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 0.12, h: 7.5,
    fill: { color }, line: { color }
  });
}

function addBottomBar(slide, label, color = C.accent) {
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 7.1, w: 13.3, h: 0.4,
    fill: { color: C.darkBg }, line: { color: C.darkBg }
  });
  slide.addText(label, {
    x: 0.2, y: 7.1, w: 13, h: 0.4,
    fontSize: 8, color: "99BBCC", italic: true, valign: "middle"
  });
}

function addSlideNum(slide, n) {
  slide.addText(String(n), {
    x: 12.8, y: 7.1, w: 0.4, h: 0.4,
    fontSize: 8, color: "668899", align: "right", valign: "middle"
  });
}

function addCategoryBadge(slide, label, color) {
  slide.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x: 0.22, y: 0.18, w: 2.8, h: 0.38,
    fill: { color }, line: { color }, rectRadius: 0.06
  });
  slide.addText(label.toUpperCase(), {
    x: 0.22, y: 0.18, w: 2.8, h: 0.38,
    fontSize: 8, bold: true, color: C.white,
    align: "center", valign: "middle", margin: 0
  });
}

function sectionHeader(pres, title, subtitle, color, bgColor) {
  const slide = pres.addSlide();
  slide.background = { color: bgColor || C.darkBg };

  // left accent stripe
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0, y: 0, w: 0.5, h: 7.5,
    fill: { color }, line: { color }
  });

  // large section number / icon area
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.5, y: 0, w: 4.5, h: 7.5,
    fill: { color, transparency: 85 }, line: { color, transparency: 85 }
  });

  slide.addText(title, {
    x: 1.2, y: 2.4, w: 11.5, h: 1.4,
    fontSize: 42, bold: true, color: C.white,
    fontFace: "Calibri"
  });
  slide.addText(subtitle, {
    x: 1.2, y: 3.9, w: 9, h: 0.7,
    fontSize: 18, color: "AACCDD", italic: true
  });
  return slide;
}

// standard content slide
function contentSlide(pres, catColor, catLabel) {
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, catColor);
  addCategoryBadge(slide, catLabel, catColor);
  return slide;
}

function addSlideTitleBox(slide, title, catColor) {
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.12, y: 0.08, w: 13.18, h: 0.72,
    fill: { color: C.darkBg }, line: { color: C.darkBg }
  });
  slide.addText(title, {
    x: 0.3, y: 0.08, w: 12.8, h: 0.72,
    fontSize: 20, bold: true, color: C.white,
    valign: "middle", margin: 0
  });
  // accent underline
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.12, y: 0.80, w: 13.18, h: 0.06,
    fill: { color: catColor }, line: { color: catColor }
  });
}

function addBox(slide, x, y, w, h, fillColor, label, labelColor, textLines, textColor, accentBar) {
  slide.addShape(pres.shapes.RECTANGLE, {
    x, y, w, h,
    fill: { color: fillColor },
    line: { color: accentBar || fillColor },
    shadow: { type: "outer", color: "000000", blur: 4, offset: 1, angle: 135, opacity: 0.1 }
  });
  if (accentBar) {
    slide.addShape(pres.shapes.RECTANGLE, {
      x, y, w: 0.08, h,
      fill: { color: accentBar }, line: { color: accentBar }
    });
  }
  if (label) {
    slide.addText(label, {
      x: x + (accentBar ? 0.14 : 0.08), y, w: w - (accentBar ? 0.22 : 0.16), h: 0.32,
      fontSize: 10, bold: true, color: labelColor || C.white,
      valign: "middle", margin: 0
    });
  }
  if (textLines && textLines.length) {
    const items = textLines.map((t, i) => ({
      text: t,
      options: { bullet: { type: "bullet", indent: 10 }, breakLine: i < textLines.length - 1, fontSize: 9.5, color: textColor || C.textDark }
    }));
    slide.addText(items, {
      x: x + (accentBar ? 0.18 : 0.1), y: y + 0.33, w: w - (accentBar ? 0.26 : 0.18), h: h - 0.38,
      valign: "top", margin: 0, fontSize: 9.5, color: textColor || C.textDark
    });
  }
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 1 – TITLE
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.darkBg };

  // top accent strip
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 13.3, h: 0.18, fill: { color: C.accent }, line: { color: C.accent } });

  // left wide accent
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0.18, w: 4.6, h: 7.32, fill: { color: C.midBg }, line: { color: C.midBg } });

  // decorative circles
  slide.addShape(pres.shapes.OVAL, { x: 0.3, y: 0.8, w: 2.5, h: 2.5, fill: { color: C.accent, transparency: 80 }, line: { color: C.accent, transparency: 80 } });
  slide.addShape(pres.shapes.OVAL, { x: 1.5, y: 3.5, w: 1.8, h: 1.8, fill: { color: C.gold, transparency: 85 }, line: { color: C.gold, transparency: 85 } });

  // category labels on left
  const cats = [
    { label: "SUPERFICIAL", color: C.superAccent, y: 2.3 },
    { label: "FOLLICULAR", color: C.follAccent, y: 3.0 },
    { label: "DERMAL & SUBCUTANEOUS", color: C.dermAccent, y: 3.7 },
  ];
  cats.forEach(c => {
    slide.addShape(pres.shapes.RECTANGLE, { x: 0.3, y: c.y, w: 3.8, h: 0.42, fill: { color: c.color, transparency: 20 }, line: { color: c.color } });
    slide.addText(c.label, { x: 0.3, y: c.y, w: 3.8, h: 0.42, fontSize: 11, bold: true, color: C.white, align: "center", valign: "middle", margin: 0 });
  });

  // main title
  slide.addText("COMMON CUTANEOUS", {
    x: 4.9, y: 1.2, w: 8.1, h: 0.9,
    fontSize: 36, bold: true, color: C.accent, fontFace: "Calibri", charSpacing: 3
  });
  slide.addText("BACTERIAL INFECTIONS", {
    x: 4.9, y: 2.05, w: 8.1, h: 0.9,
    fontSize: 36, bold: true, color: C.white, fontFace: "Calibri", charSpacing: 3
  });

  // divider line
  slide.addShape(pres.shapes.RECTANGLE, { x: 4.9, y: 3.1, w: 7.8, h: 0.04, fill: { color: C.gold }, line: { color: C.gold } });

  slide.addText("Evidence-Based Classification by Anatomical Depth", {
    x: 4.9, y: 3.3, w: 8.1, h: 0.5,
    fontSize: 15, italic: true, color: "AACCDD"
  });

  slide.addText([
    { text: "References: ", options: { bold: true } },
    { text: "Fitzpatrick's Dermatology 9e  |  Andrews' Diseases of the Skin 12e  |  IDSA Guidelines 2014" }
  ], {
    x: 4.9, y: 4.1, w: 8.1, h: 0.4,
    fontSize: 9.5, color: "88AABB"
  });

  // bottom bar
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 7.1, w: 13.3, h: 0.4, fill: { color: C.accent }, line: { color: C.accent } });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 2 – CLASSIFICATION OVERVIEW
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.darkBg };

  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 13.3, h: 0.18, fill: { color: C.accent }, line: { color: C.accent } });

  slide.addText("CLASSIFICATION BY ANATOMICAL DEPTH", {
    x: 0.4, y: 0.3, w: 12.5, h: 0.7,
    fontSize: 22, bold: true, color: C.white, charSpacing: 2
  });
  slide.addShape(pres.shapes.RECTANGLE, { x: 0.4, y: 1.0, w: 12.5, h: 0.04, fill: { color: C.gold }, line: { color: C.gold } });

  // 3 category boxes
  const catData = [
    {
      x: 0.4, color: C.superAccent, label: "A  SUPERFICIAL INFECTIONS",
      sub: "Epidermis & Stratum Corneum",
      diseases: ["Impetigo", "Ecthyma", "Erythrasma", "Pitted Keratolysis"],
      icon: "🔬"
    },
    {
      x: 4.8, color: C.follAccent, label: "B  FOLLICULAR INFECTIONS",
      sub: "Hair Follicle as Primary Target",
      diseases: ["Folliculitis", "Sycosis Barbae", "Furunculosis", "Carbuncle"],
      icon: "🧫"
    },
    {
      x: 9.1, color: C.dermAccent, label: "C  DERMAL & SUBCUTANEOUS",
      sub: "Deep Dermis & Subcutis",
      diseases: ["Erysipelas", "Cellulitis"],
      icon: "🏥"
    }
  ];

  catData.forEach(c => {
    slide.addShape(pres.shapes.RECTANGLE, {
      x: c.x, y: 1.2, w: 4.0, h: 5.6,
      fill: { color: c.color, transparency: 90 },
      line: { color: c.color, transparency: 30 }
    });
    slide.addShape(pres.shapes.RECTANGLE, {
      x: c.x, y: 1.2, w: 4.0, h: 0.7,
      fill: { color: c.color },
      line: { color: c.color }
    });
    slide.addText(c.label, {
      x: c.x + 0.1, y: 1.2, w: 3.8, h: 0.7,
      fontSize: 12, bold: true, color: C.white, valign: "middle", margin: 0
    });
    slide.addText(c.sub, {
      x: c.x + 0.1, y: 2.0, w: 3.8, h: 0.4,
      fontSize: 10, italic: true, color: "BBCCDD"
    });
    c.diseases.forEach((d, i) => {
      slide.addShape(pres.shapes.RECTANGLE, {
        x: c.x + 0.15, y: 2.55 + i * 0.75, w: 3.7, h: 0.58,
        fill: { color: C.white, transparency: 15 },
        line: { color: c.color, transparency: 50 }
      });
      slide.addShape(pres.shapes.RECTANGLE, {
        x: c.x + 0.15, y: 2.55 + i * 0.75, w: 0.08, h: 0.58,
        fill: { color: c.color }, line: { color: c.color }
      });
      slide.addText(d, {
        x: c.x + 0.32, y: 2.55 + i * 0.75, w: 3.4, h: 0.58,
        fontSize: 11, color: C.white, valign: "middle", margin: 0
      });
    });
  });

  // depth arrow on right
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 7.1, w: 13.3, h: 0.4, fill: { color: C.midBg }, line: { color: C.midBg } });
  slide.addText("Fitzpatrick's Dermatology 9e | Andrews' Diseases of the Skin 12e", {
    x: 0.3, y: 7.1, w: 12.7, h: 0.4,
    fontSize: 8, color: "668899", italic: true, valign: "middle"
  });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SECTION A DIVIDER – SUPERFICIAL
// ═══════════════════════════════════════════════════════════════════════════════
sectionHeader(pres,
  "SECTION A: SUPERFICIAL INFECTIONS",
  "Epidermis & Stratum Corneum  |  Impetigo · Ecthyma · Erythrasma · Pitted Keratolysis",
  C.superAccent, "0A2E32"
);

// ─── SLIDE: IMPETIGO ──────────────────────────────────────────────────────────
{
  const slide = contentSlide(pres, C.superAccent, "A - SUPERFICIAL INFECTIONS");
  addSlideTitleBox(slide, "IMPETIGO", C.superAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 300-302  |  Fitzpatrick's Dermatology 9e");
  addSlideNum(slide, 4);

  // Definition box
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.22, y: 0.95, w: 12.86, h: 0.52,
    fill: { color: C.superAccent, transparency: 85 },
    line: { color: C.superAccent, transparency: 50 }
  });
  slide.addText("DEFINITION: Most common superficial bacterial skin infection; sub-corneal/intra-epidermal split; highly contagious", {
    x: 0.3, y: 0.95, w: 12.7, h: 0.52,
    fontSize: 10.5, italic: true, color: C.textDark, valign: "middle"
  });

  // 4 columns: Etiology, Clinical, DDx, Management
  const boxes = [
    {
      x: 0.22, label: "ETIOLOGY", color: C.superAccent,
      lines: [
        "S. aureus: 50-70% (exfoliative toxins A/B; cleave desmoglein-1)",
        "S. pyogenes (Group A β-haemolytic) – alone or combined",
        "Bullous: exclusively S. aureus phage group 2",
        "Neonatal: Group B streptococci",
        "Streptococci early → staphylococci as lesion matures"
      ]
    },
    {
      x: 3.47, label: "CLINICAL FEATURES", color: C.superAccent,
      lines: [
        "Non-bullous: honey-golden crust on erythematous base",
        "Perioral, perinasal; crops of vesicles → pustules → crust",
        "Bullous: large fragile bullae (axillae, groin, face)",
        "Rupture → circinate weepy/crusted erosions",
        "Regional lymphadenopathy (streptococcal)",
        "Complication: Post-streptococcal GN (2-5%)"
      ]
    },
    {
      x: 6.72, label: "DIFFERENTIAL DIAGNOSIS", color: C.superAccent,
      lines: [
        "Tinea corporis – scaling, KOH positive",
        "Herpes simplex – vesicles, recurrence at same site",
        "Contact dermatitis – linear, geometric, itch > infection",
        "Pemphigus – older patients, Nikolsky positive",
        "Varicella – centripetal, systemic symptoms",
        "Ecthyma – punched-out ulcer with thick crust"
      ]
    },
    {
      x: 9.97, label: "MANAGEMENT", color: C.superAccent,
      lines: [
        "Soak & debride crusts with warm compresses",
        "Topical: Mupirocin 2%, retapamulin, fusidic acid",
        "Oral (widespread): Cefalexin, dicloxacillin",
        "MRSA: TMP-SMX or clindamycin",
        "Prevention: hand hygiene, antibiotic ointment to trauma sites",
        "Treat household contacts if recurrent"
      ]
    }
  ];

  boxes.forEach(b => {
    addBox(slide, b.x, 1.58, 3.1, 5.3, C.white, b.label, b.color, b.lines, C.textDark, b.color);
  });
}

// ─── SLIDE: ECTHYMA ───────────────────────────────────────────────────────────
{
  const slide = contentSlide(pres, C.superAccent, "A - SUPERFICIAL INFECTIONS");
  addSlideTitleBox(slide, "ECTHYMA", C.superAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 302  |  Fitzpatrick's Dermatology 9e");
  addSlideNum(slide, 5);

  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.22, y: 0.95, w: 12.86, h: 0.52,
    fill: { color: C.superAccent, transparency: 85 }, line: { color: C.superAccent, transparency: 50 }
  });
  slide.addText('DEFINITION: Ulcerative pyoderma — "impetigo going deeper"; penetrates full epidermis into upper dermis; heals with SCAR', {
    x: 0.3, y: 0.95, w: 12.7, h: 0.52,
    fontSize: 10.5, italic: true, color: C.textDark, valign: "middle"
  });

  const boxes = [
    {
      x: 0.22, label: "ETIOLOGY", color: C.superAccent,
      lines: [
        "S. pyogenes (Group A β-haemolytic) – primary",
        "S. aureus – urban areas, IVDU, HIV patients",
        "Risk: malnutrition, uncleanliness, trauma",
        "Debilitated, immunocompromised patients"
      ]
    },
    {
      x: 3.47, label: "CLINICAL FEATURES", color: C.superAccent,
      lines: [
        "Begins as vesicle/vesicopustule on erythematous base",
        "Enlarges → thick adherent 'oyster-shell' crust",
        "Removal reveals saucer-shaped punched-out ulcer",
        "Raised violaceous edges + raw base",
        "Lower extremities, buttocks most common",
        "Local adenopathy; heals with SCAR",
        "Rarely → gangrene in debilitated patients"
      ]
    },
    {
      x: 6.72, label: "DIFFERENTIAL DIAGNOSIS", color: C.superAccent,
      lines: [
        "Impetigo – superficial; no scar",
        "Herpes simplex – vesicular, grouped, Tzanck+",
        "Ecthyma gangrenosum – Pseudomonas, immunocompromised",
        "Cutaneous leishmaniasis – travel history, smear+",
        "Ulcerating SCC – rolled irregular edges, chronic",
        "Pyoderma gangrenosum – violaceous undermined edge"
      ]
    },
    {
      x: 9.97, label: "MANAGEMENT", color: C.superAccent,
      lines: [
        "Warm soaks → remove crust gently",
        "Clean with soap and water",
        "Topical: mupirocin, retapamulin, bacitracin BD",
        "Oral: Dicloxacillin or cefalexin",
        "MRSA: TMP-SMX or clindamycin",
        "Adjust per culture & sensitivity",
        "Address nutrition, hygiene, immunosuppression"
      ]
    }
  ];
  boxes.forEach(b => {
    addBox(slide, b.x, 1.58, 3.1, 5.3, C.white, b.label, b.color, b.lines, C.textDark, b.color);
  });
}

// ─── SLIDE: ERYTHRASMA ────────────────────────────────────────────────────────
{
  const slide = contentSlide(pres, C.superAccent, "A - SUPERFICIAL INFECTIONS");
  addSlideTitleBox(slide, "ERYTHRASMA", C.superAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 337-348  |  Fitzpatrick's Dermatology 9e, p. 2771");
  addSlideNum(slide, 6);

  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.22, y: 0.95, w: 12.86, h: 0.52,
    fill: { color: C.superAccent, transparency: 85 }, line: { color: C.superAccent, transparency: 50 }
  });
  slide.addText("DEFINITION: Superficial infection of the stratum corneum in intertriginous areas caused by Corynebacterium minutissimum", {
    x: 0.3, y: 0.95, w: 12.7, h: 0.52,
    fontSize: 10.5, italic: true, color: C.textDark, valign: "middle"
  });

  const boxes = [
    {
      x: 0.22, label: "ETIOLOGY", color: C.superAccent,
      lines: [
        "Corynebacterium minutissimum (gram+ diphtheroid rod)",
        "Produces coproporphyrin III → coral-red fluorescence",
        "Serine protease activity",
        "More common in: tropical climates, obesity, DM, HIV",
        "Males > Females",
        "Immunocompromised: may cause bacteremia, cellulitis"
      ]
    },
    {
      x: 3.47, label: "CLINICAL FEATURES", color: C.superAccent,
      lines: [
        "Toe webs (4th-5th): white hyperkeratotic macerated plaque",
        "Genitocrural, axillae, inframammary: reddish-brown patches",
        "'Cigarette paper' thin, finely scaled, well-demarcated",
        "Uniform (no central clearing – unlike tinea)",
        "Usually ASYMPTOMATIC; genitocrural form may itch",
        "KEY: Wood's lamp → CORAL-RED fluorescence",
        "Wash before exam may eliminate fluorescence!"
      ]
    },
    {
      x: 6.72, label: "DIFFERENTIAL DIAGNOSIS", color: C.superAccent,
      lines: [
        "Tinea cruris – KOH positive; central clearing; scaling edge",
        "Candidal intertrigo – satellite pustules; KOH+",
        "Intertrigo – no Wood's lamp fluorescence",
        "Seborrheic dermatitis – yellow greasy scales",
        "Inverse psoriasis – smooth glazed plaques; psoriasis elsewhere",
        "Lichen simplex chronicus – lichenification, intense itch"
      ]
    },
    {
      x: 9.97, label: "MANAGEMENT", color: C.superAccent,
      lines: [
        "Topical (localised): erythromycin or clindamycin – 1st line",
        "Topical fusidic acid – alternative",
        "Whitfield's ointment – alternative",
        "Oral (widespread/refractory):",
        "• Clarithromycin 1 g SINGLE DOSE",
        "• Erythromycin 250 mg QID × 14 days",
        "Prevention: keep dry, weight loss, control DM"
      ]
    }
  ];
  boxes.forEach(b => {
    addBox(slide, b.x, 1.58, 3.1, 5.3, C.white, b.label, b.color, b.lines, C.textDark, b.color);
  });
}

// ─── SLIDE: PITTED KERATOLYSIS ────────────────────────────────────────────────
{
  const slide = contentSlide(pres, C.superAccent, "A - SUPERFICIAL INFECTIONS");
  addSlideTitleBox(slide, "PITTED KERATOLYSIS", C.superAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 397-406  |  Fitzpatrick's Dermatology 9e, p. 2770");
  addSlideNum(slide, 7);

  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.22, y: 0.95, w: 12.86, h: 0.52,
    fill: { color: C.superAccent, transparency: 85 }, line: { color: C.superAccent, transparency: 50 }
  });
  slide.addText("DEFINITION: Bacterial infection of the plantar stratum corneum; small crateriform pits on pressure-bearing areas with characteristic malodour", {
    x: 0.3, y: 0.95, w: 12.7, h: 0.52,
    fontSize: 10.5, italic: true, color: C.textDark, valign: "middle"
  });

  const boxes = [
    {
      x: 0.22, label: "ETIOLOGY", color: C.superAccent,
      lines: [
        "Kytococcus sedentarius (primary organism)",
        "Also: Dermatophilus congolensis, Corynebacterium spp.",
        "Produces serine proteases → keratin degradation",
        "Male : Female ≈ 8:1",
        "Predisposed: hyperhidrosis, occlusive footwear",
        "More common in tropical climates",
        "Athletes, soldiers, workers in occlusive shoes"
      ]
    },
    {
      x: 3.47, label: "CLINICAL FEATURES", color: C.superAccent,
      lines: [
        "1–3 mm shallow crateriform pits (pressure-bearing areas)",
        "Pits coalesce → large defect with serpiginous borders",
        "Ball of foot, heel, plantar toes; web spaces",
        "Characteristic MALODOUR (2/3 of patients)",
        "Feet stick to socks – sliminess (70%)",
        "Pain/burning/irritation (1/3 of patients)",
        "Histology: keratin pits with cocci + filamentous bacteria"
      ]
    },
    {
      x: 6.72, label: "DIFFERENTIAL DIAGNOSIS", color: C.superAccent,
      lines: [
        "Tinea pedis – KOH positive; scaling; vesicles",
        "Verruca plantaris – interrupted skin lines; capillaries",
        "Palmoplantar keratoderma – diffuse, hereditary/acquired",
        "Interdigital erythrasma – Wood's lamp coral-red",
        "Plantar psoriasis – silvery scale, nail changes"
      ]
    },
    {
      x: 9.97, label: "MANAGEMENT", color: C.superAccent,
      lines: [
        "Topical erythromycin – first-line (curative)",
        "Topical clindamycin or mupirocin",
        "Miconazole / clotrimazole cream – alternatives",
        "5% benzoyl peroxide gel",
        "10-20% aluminium chloride (hyperhidrosis)",
        "Botulinum toxin if severe hyperhidrosis",
        "Prevention: dry feet, breathable footwear, absorbent powder"
      ]
    }
  ];
  boxes.forEach(b => {
    addBox(slide, b.x, 1.58, 3.1, 5.3, C.white, b.label, b.color, b.lines, C.textDark, b.color);
  });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SECTION B DIVIDER – FOLLICULAR
// ═══════════════════════════════════════════════════════════════════════════════
sectionHeader(pres,
  "SECTION B: FOLLICULAR INFECTIONS",
  "Hair Follicle as Primary Target  |  Folliculitis · Sycosis Barbae · Furunculosis · Carbuncle",
  C.follAccent, "2B1800"
);

// ─── SLIDE: FOLLICULITIS ──────────────────────────────────────────────────────
{
  const slide = contentSlide(pres, C.follAccent, "B - FOLLICULAR INFECTIONS");
  addSlideTitleBox(slide, "FOLLICULITIS  (including SYCOSIS BARBAE)", C.follAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 301-302  |  Fitzpatrick's Dermatology 9e");
  addSlideNum(slide, 9);

  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.22, y: 0.95, w: 12.86, h: 0.52,
    fill: { color: C.follAccent, transparency: 88 }, line: { color: C.follAccent, transparency: 50 }
  });
  slide.addText("DEFINITION: Infection/inflammation of hair follicles – superficial (ostium) or deep (entire follicle + perifollicular tissue)", {
    x: 0.3, y: 0.95, w: 12.7, h: 0.52,
    fontSize: 10.5, italic: true, color: C.textDark, valign: "middle"
  });

  const boxes = [
    {
      x: 0.22, label: "ETIOLOGY", color: C.follAccent,
      lines: [
        "S. aureus – most common (MRSA increasingly)",
        "Pseudomonas aeruginosa – hot tub folliculitis",
        "Gram-negative – after prolonged acne antibiotics",
        "Malassezia – Pityrosporum folliculitis (not bacterial)",
        "Demodex spp. – Demodex folliculitis"
      ]
    },
    {
      x: 3.47, label: "CLINICAL FEATURES", color: C.follAccent,
      lines: [
        "Superficial (Impetigo of Bockhart): thin-walled yellow-white pustule at follicle orifice; crops; extremities/scalp",
        "Deep staphylococcal: any hair-bearing site; trunk, axillae, pubis",
        "Sycosis Barbae: chronic perifollicular pustules in beard; upper lip first; burning/itching; may scar",
        "Associated blepharitis + conjunctivitis in severe sycosis"
      ]
    },
    {
      x: 6.72, label: "DIFFERENTIAL DIAGNOSIS", color: C.follAccent,
      lines: [
        "Tinea barbae – KOH+; spares upper lip",
        "Acne vulgaris – comedones; no hair-piercing pustule",
        "Pseudofolliculitis barbae – ingrown hairs; Black men",
        "HSV sycosis – vesicles; short course; Tzanck+",
        "Demodex folliculitis – mites on microscopy",
        "Rosacea – flushing; telangiectasia; no follicular pustule"
      ]
    },
    {
      x: 9.97, label: "MANAGEMENT", color: C.follAccent,
      lines: [
        "Mild/topical: mupirocin, clindamycin, retapamulin",
        "Benzoyl peroxide 5-10% wash",
        "Chlorhexidine 4% wash; bleach baths (½ cup/40-gal tub)",
        "Aluminium chloride anhydrous – chronic buttock folliculitis",
        "Systemic: cefalexin, dicloxacillin",
        "MRSA: TMP-SMX, clindamycin, doxycycline",
        "Decolonisation: mupirocin to nares × 5 days/month"
      ]
    }
  ];
  boxes.forEach(b => {
    addBox(slide, b.x, 1.58, 3.1, 5.3, C.white, b.label, b.color, b.lines, C.textDark, b.color);
  });
}

// ─── SLIDE: FURUNCULOSIS & CARBUNCLE ─────────────────────────────────────────
{
  const slide = contentSlide(pres, C.follAccent, "B - FOLLICULAR INFECTIONS");
  addSlideTitleBox(slide, "FURUNCULOSIS & CARBUNCLE", C.follAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 302-303  |  Fitzpatrick's Dermatology 9e");
  addSlideNum(slide, 10);

  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.22, y: 0.95, w: 12.86, h: 0.52,
    fill: { color: C.follAccent, transparency: 88 }, line: { color: C.follAccent, transparency: 50 }
  });
  slide.addText("Furuncle (Boil): acute perifollicular abscess with central suppuration  |  Carbuncle: confluent furuncles with multiple heads", {
    x: 0.3, y: 0.95, w: 12.7, h: 0.52,
    fontSize: 10.5, italic: true, color: C.textDark, valign: "middle"
  });

  const boxes = [
    {
      x: 0.22, label: "ETIOLOGY & RISK FACTORS", color: C.follAccent,
      lines: [
        "S. aureus – principal (MRSA increasingly common)",
        "Nasal/perineal carriage – key reservoir",
        "Risk: DM, atopic dermatitis, HIV/AIDS",
        "Alcoholism, malnutrition, renal dialysis",
        "Immunosuppressants; isotretinoin therapy",
        "Neutrophil dysfunction disorders",
        "Hospital-acquired MRSA – multidrug resistant"
      ]
    },
    {
      x: 3.47, label: "CLINICAL FEATURES", color: C.follAccent,
      lines: [
        "Acute round tender perifollicular abscess",
        "Sites: nape, axillae, buttocks, face",
        "⚠ DANGER ZONE: upper lip & nose (cavernous sinus thrombosis!)",
        "Central necrosis → rupture with purulent/necrotic discharge",
        "Carbuncle: confluent; systemic features (fever, malaise)",
        "Recurrences common; autoinoculation from carrier sites"
      ]
    },
    {
      x: 6.72, label: "DIFFERENTIAL DIAGNOSIS", color: C.follAccent,
      lines: [
        "Hidradenitis suppurativa – axillae/groins; tunnels; scarring",
        "Infected sebaceous cyst – cheesy material; no follicular origin",
        "Cystic acne – face; comedones; chronic",
        "Cutaneous anthrax – eschar; exposure history",
        "Inflamed epidermal inclusion cyst – prior cyst history",
        "Lymphadenitis – deeper; no skin origin"
      ]
    },
    {
      x: 9.97, label: "MANAGEMENT", color: C.follAccent,
      lines: [
        "Warm compresses – pre-fluctuant lesions",
        "I&D – definitive for fluctuant abscess (even <5 cm)",
        "RCT evidence: I&D + clindamycin or TMP-SMX > I&D alone",
        "MSSA: dicloxacillin, cefalexin",
        "MRSA: TMP-SMX, clindamycin, doxycycline, linezolid",
        "Facial furuncles: IV antibiotics; DO NOT SQUEEZE",
        "Prevention: chlorhexidine wash, bleach baths, nasal mupirocin"
      ]
    }
  ];
  boxes.forEach(b => {
    addBox(slide, b.x, 1.58, 3.1, 5.3, C.white, b.label, b.color, b.lines, C.textDark, b.color);
  });
}

// ─── SLIDE: FURUNCULOSIS PREVENTION ──────────────────────────────────────────
{
  const slide = contentSlide(pres, C.follAccent, "B - FOLLICULAR INFECTIONS");
  addSlideTitleBox(slide, "FURUNCULOSIS — PREVENTION & DECOLONISATION", C.follAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 303");
  addSlideNum(slide, 11);

  // two panel layout
  // left: prevention steps
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.22, y: 1.0, w: 6.1, h: 5.9,
    fill: { color: C.white },
    line: { color: C.follAccent, transparency: 40 },
    shadow: { type: "outer", color: "000000", blur: 4, offset: 1, angle: 135, opacity: 0.1 }
  });
  slide.addShape(pres.shapes.RECTANGLE, { x: 0.22, y: 1.0, w: 6.1, h: 0.45, fill: { color: C.follAccent }, line: { color: C.follAccent } });
  slide.addText("HYGIENE & SKIN CARE", { x: 0.3, y: 1.0, w: 5.9, h: 0.45, fontSize: 11, bold: true, color: C.white, valign: "middle", margin: 0 });

  const prevSteps = [
    "Daily 4% chlorhexidine wash (axillae, groin, perianal) × 1 week",
    "Bleach baths (sodium hypochlorite 0.005%): ½ cup/40-gallon tub, 3×/week",
    "Launder bedding and clothing daily (initially)",
    "Frequent handwashing throughout day",
    "Avoid sharing towels, clothing, razors, sports equipment",
    "Do NOT share moisturiser containers (re-inoculation risk in AD)",
    "Keep fingernails short and clean",
    "Address skin barrier: treat atopic dermatitis aggressively"
  ];
  slide.addText(prevSteps.map((t, i) => ({
    text: t, options: { bullet: { type: "bullet" }, breakLine: i < prevSteps.length - 1, fontSize: 10, color: C.textDark }
  })), { x: 0.35, y: 1.55, w: 5.8, h: 5.2, valign: "top", margin: 0 });

  // right: decolonisation regimens
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 6.8, y: 1.0, w: 6.28, h: 5.9,
    fill: { color: C.white },
    line: { color: C.follAccent, transparency: 40 },
    shadow: { type: "outer", color: "000000", blur: 4, offset: 1, angle: 135, opacity: 0.1 }
  });
  slide.addShape(pres.shapes.RECTANGLE, { x: 6.8, y: 1.0, w: 6.28, h: 0.45, fill: { color: C.follAccent }, line: { color: C.follAccent } });
  slide.addText("DECOLONISATION REGIMENS", { x: 6.88, y: 1.0, w: 6.1, h: 0.45, fontSize: 11, bold: true, color: C.white, valign: "middle", margin: 0 });

  const decolSteps = [
    "Mupirocin ointment to anterior nares BD × 5 days; repeat monthly",
    "MSSA regimen: Rifampin 10 days + Dicloxacillin (concurrent)",
    "MRSA regimen: Rifampin 10 days + TMP-SMX (concurrent)",
    "Long-term suppression: Clindamycin low-dose × 3 months",
    "Bacitracin ointment to nares BD during isotretinoin therapy",
    "Treat all household members and close contacts",
    "Repeat cultures to confirm eradication",
    "Indications: recurrent infections, spread to others, high-risk household"
  ];
  slide.addText(decolSteps.map((t, i) => ({
    text: t, options: { bullet: { type: "bullet" }, breakLine: i < decolSteps.length - 1, fontSize: 10, color: C.textDark }
  })), { x: 6.93, y: 1.55, w: 6.0, h: 5.2, valign: "top", margin: 0 });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SECTION C DIVIDER – DERMAL & SUBCUTANEOUS
// ═══════════════════════════════════════════════════════════════════════════════
sectionHeader(pres,
  "SECTION C: DERMAL & SUBCUTANEOUS INFECTIONS",
  "Deep Dermis & Subcutaneous Tissue  |  Erysipelas · Cellulitis",
  C.dermAccent, "1A0B2E"
);

// ─── SLIDE: ERYSIPELAS ────────────────────────────────────────────────────────
{
  const slide = contentSlide(pres, C.dermAccent, "C - DERMAL & SUBCUTANEOUS");
  addSlideTitleBox(slide, "ERYSIPELAS", C.dermAccent);
  addBottomBar(slide, "Fitzpatrick's Dermatology 9e, Ch. 151, p. 2775-2783  |  IDSA Guidelines 2014");
  addSlideNum(slide, 13);

  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.22, y: 0.95, w: 12.86, h: 0.52,
    fill: { color: C.dermAccent, transparency: 88 }, line: { color: C.dermAccent, transparency: 50 }
  });
  slide.addText("DEFINITION: Superficial dermis + lymphatic vessel infection with SHARPLY DEMARCATED raised borders. Variant of cellulitis — more superficial", {
    x: 0.3, y: 0.95, w: 12.7, h: 0.52,
    fontSize: 10.5, italic: true, color: C.textDark, valign: "middle"
  });

  const boxes = [
    {
      x: 0.22, label: "ETIOLOGY", color: C.dermAccent,
      lines: [
        "Streptococcus pyogenes (Group A β-haemolytic) – classic",
        "Recent studies: similar microbial profile to cellulitis",
        "Groups B, C, G streptococci – less common",
        "Portal of entry: toe web infections (most common)",
        "Found in 62% of cases"
      ]
    },
    {
      x: 3.47, label: "CLINICAL FEATURES", color: C.dermAccent,
      lines: [
        "Salmon-red, painful, edematous plaques",
        "KEY: SHARP, RAISED, PALPABLE BORDER",
        "Peau d'orange surface appearance",
        "Leg 76-90%; also face and upper extremity",
        "Fever, chills, malaise more prominent than cellulitis",
        "Facial: butterfly distribution, edematous",
        "Recurrence observed; systemic complications uncommon"
      ]
    },
    {
      x: 6.72, label: "DIFFERENTIAL DIAGNOSIS", color: C.dermAccent,
      lines: [
        "Cellulitis – ill-defined border (KEY distinguishing feature)",
        "Necrotizing fasciitis – crepitus, anesthesia, rapid spread (EMERGENCY)",
        "Contact/eczematous dermatitis – scaling, pruritus, no fever",
        "Angioedema – bilateral, no fever, no erythema",
        "Herpes zoster (pre-vesicular) – dermatomal",
        "Gout – overlies joint, crystals on aspiration"
      ]
    },
    {
      x: 9.97, label: "MANAGEMENT", color: C.dermAccent,
      lines: [
        "Mild/outpatient: Penicillin V or amoxicillin oral",
        "Moderate: Benzylpenicillin IV",
        "Penicillin allergy: clindamycin or macrolides",
        "Elevate affected limb",
        "Mark advancing border to monitor response",
        "Prophylaxis for recurrence: Penicillin V 250 mg BD",
        "Treat predisposing factors (tinea pedis, oedema)"
      ]
    }
  ];
  boxes.forEach(b => {
    addBox(slide, b.x, 1.58, 3.1, 5.3, C.white, b.label, b.color, b.lines, C.textDark, b.color);
  });
}

// ─── SLIDE: CELLULITIS ────────────────────────────────────────────────────────
{
  const slide = contentSlide(pres, C.dermAccent, "C - DERMAL & SUBCUTANEOUS");
  addSlideTitleBox(slide, "CELLULITIS", C.dermAccent);
  addBottomBar(slide, "Fitzpatrick's Dermatology 9e, Ch. 151, p. 2775-2783  |  IDSA Guidelines 2014");
  addSlideNum(slide, 14);

  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.22, y: 0.95, w: 12.86, h: 0.52,
    fill: { color: C.dermAccent, transparency: 88 }, line: { color: C.dermAccent, transparency: 50 }
  });
  slide.addText("DEFINITION: Infection of deep dermis and subcutaneous tissue; ILL-DEFINED spreading erythema; unilateral lower extremity most common", {
    x: 0.3, y: 0.95, w: 12.7, h: 0.52,
    fontSize: 10.5, italic: true, color: C.textDark, valign: "middle"
  });

  const boxes = [
    {
      x: 0.22, label: "ETIOLOGY", color: C.dermAccent,
      lines: [
        "S. pyogenes + S. aureus (incl. MRSA) – most common",
        "Causative organism found in <1/3 of cases",
        "Bite wounds: Pasteurella, Eikenella, Capnocytophaga",
        "Aquatic: Aeromonas, Vibrio vulnificus, M. marinum",
        "Immunocompromised: gram-negatives, Pseudomonas, fungi",
        "Polymicrobial in diabetics/surgical wounds"
      ]
    },
    {
      x: 3.47, label: "CLINICAL FEATURES", color: C.dermAccent,
      lines: [
        "Spreading ILL-DEFINED erythema, oedema, warmth, pain",
        "ALMOST ALWAYS UNILATERAL (bilateral → seek other diagnosis)",
        "Lower extremity in adults; face in children",
        "Lymphangitis, skip areas, peau d'orange",
        "Bullae + superficial necrosis in severe cases",
        "⚠ Crepitus/anesthesia/pain out of proportion → NECROTISING FASCIITIS"
      ]
    },
    {
      x: 6.72, label: "DIFFERENTIAL DIAGNOSIS", color: C.dermAccent,
      lines: [
        "DVT / post-thrombotic syndrome – Duplex USS",
        "Stasis dermatitis – bilateral, scaling, pruritus",
        "Lipodermatosclerosis – inverted champagne bottle leg",
        "Gout/pseudogout – overlies joint; crystals",
        "Erythema migrans – annular; tick exposure",
        "Erythema nodosum – nodules; bilateral shins",
        "Necrotizing fasciitis – EXCLUDE URGENTLY (crepitus)"
      ]
    },
    {
      x: 9.97, label: "MANAGEMENT", color: C.dermAccent,
      lines: [
        "Outpatient non-purulent: cefalexin, dicloxacillin",
        "Outpatient purulent/MRSA: TMP-SMX, clindamycin, doxycycline",
        "Inpatient IV: cefazolin/ceftriaxone; vancomycin (MRSA)",
        "Severe/polymicrobial: pip-tazo or imipenem",
        "Elevate limb; mark border; serial photography",
        "Prophylaxis (≥3 episodes/year): Penicillin V 250 mg BD",
        "IDSA 2014: do NOT routinely culture blood/swabs/aspirates"
      ]
    }
  ];
  boxes.forEach(b => {
    addBox(slide, b.x, 1.58, 3.1, 5.3, C.white, b.label, b.color, b.lines, C.textDark, b.color);
  });
}

// ─── SLIDE: CELLULITIS DIAGNOSIS ─────────────────────────────────────────────
{
  const slide = contentSlide(pres, C.dermAccent, "C - DERMAL & SUBCUTANEOUS");
  addSlideTitleBox(slide, "CELLULITIS — DIAGNOSIS & ALT-70 SCORE", C.dermAccent);
  addBottomBar(slide, "Fitzpatrick's Dermatology 9e, p. 2780-2781  |  IDSA 2014");
  addSlideNum(slide, 15);

  // ALT-70 box
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 0.22, y: 0.95, w: 6.2, h: 5.9,
    fill: { color: C.white },
    line: { color: C.dermAccent, transparency: 30 },
    shadow: { type: "outer", color: "000000", blur: 4, offset: 1, angle: 135, opacity: 0.1 }
  });
  slide.addShape(pres.shapes.RECTANGLE, { x: 0.22, y: 0.95, w: 6.2, h: 0.48, fill: { color: C.dermAccent }, line: { color: C.dermAccent } });
  slide.addText("ALT-70 RISK PREDICTION SCORE", { x: 0.3, y: 0.95, w: 6.0, h: 0.48, fontSize: 12, bold: true, color: C.white, valign: "middle", margin: 0 });

  const altRows = [
    [{ text: "PARAMETER", options: { bold: true, color: C.white, fill: { color: C.textMid } } }, { text: "POINTS", options: { bold: true, color: C.white, fill: { color: C.textMid } } }],
    [{ text: "Asymmetry (unilateral involvement)", options: {} }, { text: "3 pts", options: { bold: true, color: C.dermAccent } }],
    [{ text: "Leukocytosis ≥ 10,000 cells/μL", options: {} }, { text: "1 pt", options: { bold: true, color: C.dermAccent } }],
    [{ text: "Tachycardia ≥ 90 beats/min", options: {} }, { text: "1 pt", options: { bold: true, color: C.dermAccent } }],
    [{ text: "Age ≥ 70 years", options: {} }, { text: "2 pts", options: { bold: true, color: C.dermAccent } }],
  ];
  slide.addTable(altRows, {
    x: 0.35, y: 1.52, w: 5.95, h: 2.0,
    border: { pt: 0.5, color: "CCDDEE" },
    fill: { color: "F5FAFF" },
    colW: [4.2, 1.75],
    fontSize: 10
  });

  slide.addShape(pres.shapes.RECTANGLE, { x: 0.35, y: 3.65, w: 5.95, h: 0.5, fill: { color: "E8F5F6" }, line: { color: C.dermAccent, transparency: 50 } });
  slide.addText("Score 0-2 → NPV > 83% (likely NOT cellulitis)", { x: 0.45, y: 3.67, w: 5.75, h: 0.25, fontSize: 9.5, color: C.textDark });
  slide.addText("Score ≥ 5 → PPV > 82% (likely cellulitis)", { x: 0.45, y: 3.9, w: 5.75, h: 0.25, fontSize: 9.5, color: C.textDark });

  const diagLines = [
    "Diagnosis is primarily CLINICAL",
    "Misdiagnosis rate >30% in ED/hospital settings",
    "Dermatology consultation improves accuracy",
    "CBC: leukocytosis in 34-50% (non-specific)",
    "ESR/CRP elevated in >75% (non-specific)",
    "Blood cultures: positive in only ~5% (reserve for high-risk)",
    "Skin needle aspirate: low yield (5-40%)",
    "IDSA 2014: do NOT routinely culture blood/swabs",
    "Abscess/pustule culture: recommended",
    "Ultrasound: identifies fluid collections for I&D",
    "MRI: differentiates cellulitis from necrotising fasciitis"
  ];
  slide.addShape(pres.shapes.RECTANGLE, { x: 0.35, y: 4.25, w: 5.95, h: 0.38, fill: { color: C.dermAccent, transparency: 85 }, line: { color: C.dermAccent, transparency: 60 } });
  slide.addText("SUPPORTIVE INVESTIGATIONS", { x: 0.45, y: 4.25, w: 5.75, h: 0.38, fontSize: 10, bold: true, color: C.dermAccent, valign: "middle", margin: 0 });
  slide.addText(diagLines.map((t, i) => ({
    text: t, options: { bullet: { type: "bullet" }, breakLine: i < diagLines.length - 1, fontSize: 9.2, color: C.textDark }
  })), { x: 0.38, y: 4.68, w: 6.0, h: 2.2, valign: "top", margin: 0 });

  // right: DDx pseudocellulitis
  slide.addShape(pres.shapes.RECTANGLE, {
    x: 6.8, y: 0.95, w: 6.28, h: 5.9,
    fill: { color: C.white },
    line: { color: C.dermAccent, transparency: 30 },
    shadow: { type: "outer", color: "000000", blur: 4, offset: 1, angle: 135, opacity: 0.1 }
  });
  slide.addShape(pres.shapes.RECTANGLE, { x: 6.8, y: 0.95, w: 6.28, h: 0.48, fill: { color: C.dermAccent }, line: { color: C.dermAccent } });
  slide.addText("PSEUDOCELLULITIS — COMMON MIMICS", { x: 6.88, y: 0.95, w: 6.1, h: 0.48, fontSize: 12, bold: true, color: C.white, valign: "middle", margin: 0 });

  const ddxRows = [
    [{ text: "CONDITION", options: { bold: true, color: C.white, fill: { color: C.textMid } } }, { text: "KEY DISTINGUISHING FEATURE", options: { bold: true, color: C.white, fill: { color: C.textMid } } }],
    ["DVT / post-thrombotic", "Duplex USS; bilateral possible; no erythema"],
    ["Stasis dermatitis", "Bilateral; scaling; pruritus; chronic"],
    ["Lipodermatosclerosis", "Inverted champagne bottle; fibrous; chronic"],
    ["Contact dermatitis", "Geometric borders; pruritus; no fever"],
    ["Gout / pseudogout", "Overlies joint; crystal aspiration+"],
    ["Erythema migrans", "Annular; tick exposure; endemic area"],
    ["Erythema nodosum", "Nodular; bilateral shins; no purulence"],
    ["Necrotising fasciitis ⚠", "Crepitus; anesthesia; RAPID spread → EMERGENCY"],
  ];
  slide.addTable(ddxRows, {
    x: 6.9, y: 1.52, w: 6.05, h: 5.2,
    border: { pt: 0.5, color: "CCDDEE" },
    fill: { color: "F8F2FF" },
    colW: [2.5, 3.55],
    fontSize: 9.2
  });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE: COMPARATIVE SUMMARY TABLE
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 13.3, h: 0.18, fill: { color: C.accent }, line: { color: C.accent } });
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0.18, w: 13.3, h: 0.72, fill: { color: C.darkBg }, line: { color: C.darkBg } });
  slide.addText("COMPARATIVE SUMMARY — ALL DISEASES BY DEPTH", {
    x: 0.3, y: 0.18, w: 12.8, h: 0.72,
    fontSize: 20, bold: true, color: C.white, valign: "middle", margin: 0
  });

  const rows = [
    [
      { text: "DISEASE", options: { bold: true, color: C.white, fill: { color: C.darkBg } } },
      { text: "CATEGORY", options: { bold: true, color: C.white, fill: { color: C.darkBg } } },
      { text: "DEPTH", options: { bold: true, color: C.white, fill: { color: C.darkBg } } },
      { text: "ORGANISM", options: { bold: true, color: C.white, fill: { color: C.darkBg } } },
      { text: "KEY LESION", options: { bold: true, color: C.white, fill: { color: C.darkBg } } },
      { text: "DX PEARL", options: { bold: true, color: C.white, fill: { color: C.darkBg } } },
      { text: "1st LINE Rx", options: { bold: true, color: C.white, fill: { color: C.darkBg } } },
    ],
    [
      { text: "Impetigo", options: { fill: { color: "E0F7F8" } } },
      { text: "Superficial", options: { fill: { color: "E0F7F8" }, color: "007A80", bold: true } },
      "Sub-corneal / intra-epidermal",
      "S. aureus / S. pyogenes",
      "Honey-golden crust",
      "Culture; Tzanck",
      "Mupirocin / Cefalexin",
    ],
    [
      { text: "Ecthyma", options: { fill: { color: "E0F7F8" } } },
      { text: "Superficial", options: { fill: { color: "E0F7F8" }, color: "007A80", bold: true } },
      "Full epidermis → upper dermis",
      "S. pyogenes / S. aureus",
      "Punched-out ulcer + thick crust",
      "Clinical; culture",
      "Dicloxacillin / Cefalexin",
    ],
    [
      { text: "Erythrasma", options: { fill: { color: "E0F7F8" } } },
      { text: "Superficial", options: { fill: { color: "E0F7F8" }, color: "007A80", bold: true } },
      "Stratum corneum (intertriginous)",
      "C. minutissimum",
      "Brown intertriginous patch",
      "Wood's lamp: coral-red",
      "Topical erythromycin / Clarithromycin 1g",
    ],
    [
      { text: "Pitted Keratolysis", options: { fill: { color: "E0F7F8" } } },
      { text: "Superficial", options: { fill: { color: "E0F7F8" }, color: "007A80", bold: true } },
      "Stratum corneum (plantar)",
      "K. sedentarius",
      "Plantar pits + malodour",
      "Clinical; serine proteases",
      "Topical erythromycin / Clindamycin",
    ],
    [
      { text: "Folliculitis", options: { fill: { color: "FFF3E0" } } },
      { text: "Follicular", options: { fill: { color: "FFF3E0" }, color: "B35A00", bold: true } },
      "Follicular ostium / deep follicle",
      "S. aureus (Pseudomonas hot tub)",
      "Perifollicular pustule",
      "Culture swab",
      "Topical mupirocin / Clindamycin",
    ],
    [
      { text: "Furunculosis", options: { fill: { color: "FFF3E0" } } },
      { text: "Follicular", options: { fill: { color: "FFF3E0" }, color: "B35A00", bold: true } },
      "Perifollicular dermis",
      "S. aureus / MRSA",
      "Fluctuant abscess",
      "Culture; I&D",
      "I&D + TMP-SMX or Clindamycin",
    ],
    [
      { text: "Carbuncle", options: { fill: { color: "FFF3E0" } } },
      { text: "Follicular", options: { fill: { color: "FFF3E0" }, color: "B35A00", bold: true } },
      "Confluent follicular → deep dermis",
      "S. aureus / MRSA",
      "Multi-headed abscess",
      "Culture; systemic signs",
      "I&D + IV antibiotics if severe",
    ],
    [
      { text: "Erysipelas", options: { fill: { color: "F3E5F5" } } },
      { text: "Dermal/Subcut.", options: { fill: { color: "F3E5F5" }, color: "6A0080", bold: true } },
      "Superficial dermis + lymphatics",
      "S. pyogenes",
      "SHARP-BORDERED red plaque",
      "Sharp raised palpable edge",
      "Penicillin V / Benzylpenicillin IV",
    ],
    [
      { text: "Cellulitis", options: { fill: { color: "F3E5F5" } } },
      { text: "Dermal/Subcut.", options: { fill: { color: "F3E5F5" }, color: "6A0080", bold: true } },
      "Deep dermis + subcutaneous",
      "S. pyogenes / S. aureus / MRSA",
      "ILL-DEFINED erythema",
      "ALT-70 score; clinical",
      "Cefalexin / Vancomycin (MRSA)",
    ],
  ];

  slide.addTable(rows, {
    x: 0.15, y: 1.0, w: 13.0, h: 6.0,
    border: { pt: 0.5, color: "CCDDEE" },
    colW: [1.5, 1.35, 1.85, 2.0, 1.8, 1.85, 2.65],
    fontSize: 8.5,
    autoPage: false
  });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE: ANATOMICAL DEPTH DIAGRAM
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.darkBg };
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 13.3, h: 0.18, fill: { color: C.accent }, line: { color: C.accent } });
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0.18, w: 13.3, h: 0.65, fill: { color: C.midBg }, line: { color: C.midBg } });
  slide.addText("ANATOMICAL DEPTH — SUMMARY DIAGRAM", {
    x: 0.3, y: 0.18, w: 12.8, h: 0.65,
    fontSize: 20, bold: true, color: C.white, valign: "middle", margin: 0
  });

  // skin layer bands (left side)
  const layers = [
    { label: "Stratum Corneum", y: 1.0, h: 0.8, color: "F5C842", textColor: C.darkBg },
    { label: "Epidermis", y: 1.8, h: 0.9, color: "F5A623", textColor: C.white },
    { label: "Dermis (Superficial)", y: 2.7, h: 1.0, color: "E87040", textColor: C.white },
    { label: "Dermis (Deep)", y: 3.7, h: 1.0, color: "CC4A20", textColor: C.white },
    { label: "Subcutaneous Tissue", y: 4.7, h: 1.0, color: "9B3010", textColor: C.white },
    { label: "Fascia / Muscle", y: 5.7, h: 0.8, color: "6B1B08", textColor: "FF9999" },
  ];

  layers.forEach(l => {
    slide.addShape(pres.shapes.RECTANGLE, { x: 0.2, y: l.y, w: 2.8, h: l.h, fill: { color: l.color }, line: { color: l.color } });
    slide.addText(l.label, { x: 0.25, y: l.y, w: 2.7, h: l.h, fontSize: 9.5, bold: true, color: l.textColor, valign: "middle", align: "center", margin: 0 });
  });

  // labels for the diseases at each layer
  const diseaseLabels = [
    { text: "Pitted Keratolysis\nErythrasma", y: 1.05, color: C.superAccent },
    { text: "Impetigo (non-bullous)\nEcthyma (starts here)", y: 1.88, color: C.superAccent },
    { text: "Folliculitis (superficial)\nSycosis Barbae\nEcthyma (extends here)\nErysipelas", y: 2.75, color: C.follAccent },
    { text: "Furunculosis\nCarbuncle\nCellulitis", y: 3.75, color: C.dermAccent },
    { text: "Cellulitis (extends here)", y: 4.78, color: C.dermAccent },
    { text: "Necrotising Fasciitis (not covered – emergency)", y: 5.78, color: "FF6B6B" },
  ];

  diseaseLabels.forEach(d => {
    slide.addShape(pres.shapes.RECTANGLE, { x: 3.2, y: d.y, w: 0.04, h: 0.65, fill: { color: d.color }, line: { color: d.color } });
    slide.addText(d.text, { x: 3.35, y: d.y, w: 9.5, h: 0.65, fontSize: 10, color: d.color, valign: "middle", margin: 0 });
  });

  // category legend
  const legends = [
    { label: "SUPERFICIAL", color: C.superAccent, x: 0.3 },
    { label: "FOLLICULAR", color: C.follAccent, x: 3.5 },
    { label: "DERMAL / SUBCUTANEOUS", color: C.dermAccent, x: 6.7 },
  ];
  legends.forEach(l => {
    slide.addShape(pres.shapes.RECTANGLE, { x: l.x, y: 6.95, w: 0.3, h: 0.3, fill: { color: l.color }, line: { color: l.color } });
    slide.addText(l.label, { x: l.x + 0.35, y: 6.95, w: 2.8, h: 0.3, fontSize: 9, color: l.color, valign: "middle", margin: 0 });
  });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE: REFERENCES
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.darkBg };
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 13.3, h: 0.18, fill: { color: C.gold }, line: { color: C.gold } });
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0.18, w: 13.3, h: 0.72, fill: { color: C.midBg }, line: { color: C.midBg } });
  slide.addText("REFERENCES", {
    x: 0.4, y: 0.18, w: 12.5, h: 0.72,
    fontSize: 24, bold: true, color: C.white, charSpacing: 4, valign: "middle"
  });

  const refs = [
    "1.  James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM. Andrews' Diseases of the Skin: Clinical Dermatology. 13th ed. Elsevier; 2020. (ISBN 9780323547536). Chapters 14, pp. 297–310.",
    "2.  Kang S, Amagai M, Bruckner AL, et al. Fitzpatrick's Dermatology. 9th ed. McGraw-Hill; 2019. (ISBN 9780071837781). Chapters 150 (pp. 2768–2774) & 151 (pp. 2775–2786).",
    "3.  Stevens DL, Bisno AL, Chambers HF, et al. Practice guidelines for the diagnosis and management of skin and soft tissue infections: 2014 update by the IDSA. Clin Infect Dis. 2014;59(2):e10–e52.",
    "4.  Jacka J, Sierla R, Kilbreath SL. A Systematic Review of Cellulitis Guidelines: The Role of Non-Pharmacological Management in Preventing Recurrence. Australas J Dermatol. 2025;66(5). [PMID 40530782]",
    "5.  Bolognia JL, Schaffer JV, Cerroni L. Dermatology. 5th ed. Elsevier; 2024. (ISBN 9780702082252).",
    "6.  Rho NK, Kim BJ. A corynebacterial triad: pitted keratolysis, trichomycosis axillaris, and erythrasma. J Am Acad Dermatol. 2008;58(5 Suppl 1):S57–S58.",
    "7.  Bristow IR, Lee YL. Pitted keratolysis: a clinical review. J Am Podiatr Med Assoc. 2014;104(2):177–182.",
  ];

  refs.forEach((r, i) => {
    slide.addText(r, {
      x: 0.4, y: 1.1 + i * 0.74, w: 12.5, h: 0.65,
      fontSize: 9.8, color: "AACCDD", valign: "top"
    });
  });

  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 7.1, w: 13.3, h: 0.4, fill: { color: C.accent }, line: { color: C.accent } });
  slide.addText("Common Cutaneous Bacterial Infections  |  Evidence-Based Review  |  " + new Date().getFullYear(), {
    x: 0.3, y: 7.1, w: 12.7, h: 0.4,
    fontSize: 9, color: C.white, align: "center", valign: "middle"
  });
}

// ─── WRITE FILE ───────────────────────────────────────────────────────────────
pres.writeFile({ fileName: "/home/daytona/workspace/cutaneous-infections-ppt/Cutaneous_Bacterial_Infections.pptx" })
  .then(() => console.log("✅ PPT created successfully"))
  .catch(e => { console.error("❌ Error:", e); process.exit(1); });

const pptxgen = require("pptxgenjs");
const { execSync } = require("child_process");

// ─── FETCH ALL IMAGES UP FRONT ────────────────────────────────────────────────
const imageUrls = {
  impetigo_nonbullous:  "https://cdn.orris.care/cdss_images/d3c384fb7d3ad6ce19da7f641d235793783f844dc1ce44d19291f9b431500218.png",
  impetigo_bullous:     "https://cdn.orris.care/cdss_images/f3edf5aedf06b5d9fef89e0e14a93368771ce112be646c1ce508b818a5959fe9.png",
  impetigo_face:        "https://cdn.orris.care/cdss_images/d43ea3d3b49c9e1cc0e952290ececa1035cd2c3e4e2270eae4ee86d4442e555a.png",
  ecthyma1:             "https://cdn.orris.care/cdss_images/77b239ea3d2a9c947e678dbbdbd375752fe1eec0f95801124a43b37a2c35b123.png",
  ecthyma2:             "https://cdn.orris.care/cdss_images/ca774ac84699a26ee8d684646e2f933cd6dde3805c6bed6d6ab1b4932ff6d183.png",
  folliculitis1:        "https://cdn.orris.care/cdss_images/40388c8adeef18745048cab0a9be8afb2a191bbb871af16062706a09ae33db44.png",
  folliculitis2:        "https://cdn.orris.care/cdss_images/07f5798d944b2206795a4c4c2db4ff47acb8f08211e5d12743e7a61426a0e186.png",
  folliculitis_buttock: "https://cdn.orris.care/cdss_images/75baef6779e4aef72312a7d067ba6c93d0faf0128577e7d96020d2ca99fc72b7.png",
  furuncle1:            "https://cdn.orris.care/cdss_images/22025a8573ba0e5a6596f9ce843a97c9e56f6aaaeaaf374992daf796b4e22dcb.png",
  furuncle2:            "https://cdn.orris.care/cdss_images/81eb40b7082d5c2d5ca38cc2e06797ed66b217c3f7d8aaae0db3d4aaa9039061.png",
  erysipelas_face:      "https://cdn.orris.care/cdss_images/d2a00734a29b8e9e2391daaeaa02c7176edf394cf5a12ada60d4d988acaf7ea7.png",
  erysipelas_ear:       "https://cdn.orris.care/cdss_images/809bd1916ed0286467dccd85bd9c144c47bcc93e0895d4b50a5257d88126d83f.png",
  cellulitis1:          "https://cdn.orris.care/cdss_images/7f1de929c192b62dc06693107164151fc13d81807327ee6d1b6e677122f7297a.png",
  cellulitis2:          "https://cdn.orris.care/cdss_images/3fd4cde9ed0f84b81d14eb0c74ddca8c28d8e13fafc2397822fbcc59b274da42.png",
  erythrasma1:          "https://cdn.orris.care/cdss_images/b17b0f7987a3bf75805c5bfb4a618ebca1d1484049ed09f83fe95e831257ef74.png",
  erythrasma2:          "https://cdn.orris.care/cdss_images/103f9ef5384cbe3bcced5bc0a79601bf2535e677cfc3e6ab009281c3b7cfdb03.png",
  pitted1:              "https://cdn.orris.care/cdss_images/672c7a7aaa72d53c6822d0eb30c8b0da53ae76516854550f59e070b011794654.png",
  pitted2:              "https://cdn.orris.care/cdss_images/93929e798b4d208a07179b5051f943f312b0a7dec07cfc2a96ba2b6c1e978746.png",
};

console.log("Fetching images...");
const urlArgs = Object.values(imageUrls).map(u => `"${u}"`).join(" ");
let imgData = {};
try {
  const raw = execSync(
    `node /home/daytona/skills/shared/scripts/fetch_images.js ${urlArgs}`,
    { maxBuffer: 50 * 1024 * 1024, timeout: 90000 }
  ).toString();
  const arr = JSON.parse(raw);
  const keys = Object.keys(imageUrls);
  arr.forEach((item, i) => {
    if (item && !item.error && item.base64) {
      imgData[keys[i]] = item.base64;
    } else {
      console.warn(`Could not fetch image: ${keys[i]}`);
      imgData[keys[i]] = null;
    }
  });
} catch(e) {
  console.error("Image fetch error:", e.message);
  Object.keys(imageUrls).forEach(k => imgData[k] = null);
}
console.log("Images fetched:", Object.values(imgData).filter(Boolean).length, "/", Object.keys(imgData).length);

// ─── PPT SETUP ────────────────────────────────────────────────────────────────
const pres = new pptxgen();
pres.layout = "LAYOUT_WIDE"; // 13.3" x 7.5"
pres.title = "Common Cutaneous Bacterial Infections";

const C = {
  darkBg:      "0D2B45",
  midBg:       "1A4A6E",
  accent:      "2AAFB8",
  accentLight: "5BC8D0",
  gold:        "E8B84B",
  white:       "FFFFFF",
  offWhite:    "F0F6FA",
  textDark:    "0D2B45",
  textMid:     "2A4A65",
  lightGray:   "DDE8F0",
  superAccent: "2AAFB8",
  follAccent:  "E8930A",
  dermAccent:  "8E44AD",
};

// ─── HELPERS ─────────────────────────────────────────────────────────────────
function addDividerBar(slide, color) {
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.12, h:7.5, fill:{color}, line:{color} });
}

function addBottomBar(slide, label) {
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:7.1, w:13.3, h:0.4, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText(label, { x:0.2, y:7.1, w:12.8, h:0.4, fontSize:9, color:"99BBCC", italic:true, valign:"middle" });
}

function addCategoryBadge(slide, label, color) {
  slide.addShape(pres.shapes.ROUNDED_RECTANGLE, { x:0.22, y:0.18, w:3.2, h:0.44, fill:{color}, line:{color}, rectRadius:0.06 });
  slide.addText(label.toUpperCase(), { x:0.22, y:0.18, w:3.2, h:0.44, fontSize:9.5, bold:true, color:C.white, align:"center", valign:"middle", margin:0 });
}

function addSlideTitle(slide, title, catColor) {
  slide.addShape(pres.shapes.RECTANGLE, { x:0.12, y:0.08, w:13.18, h:0.78, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText(title, { x:0.3, y:0.08, w:12.8, h:0.78, fontSize:22, bold:true, color:C.white, valign:"middle", margin:0 });
  slide.addShape(pres.shapes.RECTANGLE, { x:0.12, y:0.86, w:13.18, h:0.07, fill:{color:catColor}, line:{color:catColor} });
}

function sectionDivider(title, subtitle, color, bgColor) {
  const slide = pres.addSlide();
  slide.background = { color: bgColor || C.darkBg };
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.55, h:7.5, fill:{color}, line:{color} });
  slide.addShape(pres.shapes.RECTANGLE, { x:0.55, y:0, w:5.0, h:7.5, fill:{color, transparency:88}, line:{color, transparency:88} });
  slide.addText(title, { x:1.3, y:2.3, w:11.5, h:1.5, fontSize:44, bold:true, color:C.white, fontFace:"Calibri" });
  slide.addText(subtitle, { x:1.3, y:3.9, w:10, h:0.8, fontSize:17, color:"AACCDD", italic:true });
  return slide;
}

// Disease slide: LEFT = text content (2 cols), RIGHT = image(s)
// Layout: 13.3" wide. Text area: 0.12 to 8.2" (8.1" wide). Image area: 8.3 to 13.1" (4.8" wide)
function addImageToSlide(slide, key, x, y, w, h) {
  if (imgData[key]) {
    slide.addImage({ data: imgData[key], x, y, w, h });
  }
}

function addLabelBox(slide, x, y, w, h, label, color, lines, fontSize) {
  const fs = fontSize || 12;
  slide.addShape(pres.shapes.RECTANGLE, { x, y, w, h, fill:{color:C.white}, line:{color, transparency:40},
    shadow:{type:"outer",color:"000000",blur:4,offset:1,angle:135,opacity:0.1} });
  slide.addShape(pres.shapes.RECTANGLE, { x, y, w, h:0.4, fill:{color}, line:{color} });
  slide.addText(label, { x:x+0.08, y, w:w-0.1, h:0.4, fontSize:fs-0.5, bold:true, color:C.white, valign:"middle", margin:0 });
  if (lines && lines.length) {
    const items = lines.map((t,i) => ({
      text: t,
      options: { bullet:{type:"bullet", indent:10}, breakLine: i<lines.length-1, fontSize:fs, color:C.textDark, paraSpaceAfter:1 }
    }));
    slide.addText(items, { x:x+0.1, y:y+0.44, w:w-0.18, h:h-0.48, valign:"top", margin:0 });
  }
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 1 – TITLE
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.darkBg };
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:13.3, h:0.18, fill:{color:C.accent}, line:{color:C.accent} });
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0.18, w:4.8, h:7.32, fill:{color:C.midBg}, line:{color:C.midBg} });
  slide.addShape(pres.shapes.OVAL, { x:0.3, y:0.8, w:2.8, h:2.8, fill:{color:C.accent, transparency:82}, line:{color:C.accent, transparency:82} });
  slide.addShape(pres.shapes.OVAL, { x:1.7, y:3.8, w:1.8, h:1.8, fill:{color:C.gold, transparency:85}, line:{color:C.gold, transparency:85} });

  const cats = [
    { label:"SUPERFICIAL INFECTIONS", color:C.superAccent, y:2.2 },
    { label:"FOLLICULAR INFECTIONS", color:C.follAccent, y:2.9 },
    { label:"DERMAL & SUBCUTANEOUS", color:C.dermAccent, y:3.6 },
  ];
  cats.forEach(c => {
    slide.addShape(pres.shapes.RECTANGLE, { x:0.3, y:c.y, w:4.0, h:0.48, fill:{color:c.color, transparency:15}, line:{color:c.color} });
    slide.addText(c.label, { x:0.3, y:c.y, w:4.0, h:0.48, fontSize:12.5, bold:true, color:C.white, align:"center", valign:"middle", margin:0 });
  });

  slide.addText("COMMON CUTANEOUS", { x:5.1, y:1.1, w:8.0, h:1.0, fontSize:38, bold:true, color:C.accent, fontFace:"Calibri", charSpacing:2 });
  slide.addText("BACTERIAL INFECTIONS", { x:5.1, y:2.05, w:8.0, h:1.0, fontSize:38, bold:true, color:C.white, fontFace:"Calibri", charSpacing:2 });
  slide.addShape(pres.shapes.RECTANGLE, { x:5.1, y:3.15, w:7.9, h:0.05, fill:{color:C.gold}, line:{color:C.gold} });
  slide.addText("Evidence-Based Classification by Anatomical Depth", { x:5.1, y:3.3, w:8.0, h:0.6, fontSize:17, italic:true, color:"AACCDD" });
  slide.addText([
    {text:"References: ", options:{bold:true}},
    {text:"Fitzpatrick's Dermatology 9e  |  Andrews' Diseases of the Skin 12e  |  IDSA Guidelines 2014"}
  ], { x:5.1, y:4.1, w:8.0, h:0.45, fontSize:10.5, color:"88AABB" });

  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:7.1, w:13.3, h:0.4, fill:{color:C.accent}, line:{color:C.accent} });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE 2 – CLASSIFICATION OVERVIEW
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.darkBg };
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:13.3, h:0.18, fill:{color:C.accent}, line:{color:C.accent} });
  slide.addText("CLASSIFICATION BY ANATOMICAL DEPTH", {
    x:0.4, y:0.25, w:12.5, h:0.75, fontSize:24, bold:true, color:C.white, charSpacing:2
  });
  slide.addShape(pres.shapes.RECTANGLE, { x:0.4, y:0.98, w:12.5, h:0.05, fill:{color:C.gold}, line:{color:C.gold} });

  const catData = [
    { x:0.35, color:C.superAccent, label:"A  SUPERFICIAL INFECTIONS", sub:"Epidermis & Stratum Corneum",
      diseases:["Impetigo","Ecthyma","Erythrasma","Pitted Keratolysis"] },
    { x:4.75, color:C.follAccent,  label:"B  FOLLICULAR INFECTIONS",  sub:"Hair Follicle as Primary Target",
      diseases:["Folliculitis","Sycosis Barbae","Furunculosis","Carbuncle"] },
    { x:9.15, color:C.dermAccent,  label:"C  DERMAL & SUBCUTANEOUS",  sub:"Deep Dermis & Subcutis",
      diseases:["Erysipelas","Cellulitis"] },
  ];
  catData.forEach(c => {
    slide.addShape(pres.shapes.RECTANGLE, { x:c.x, y:1.1, w:4.0, h:6.0, fill:{color:c.color, transparency:90}, line:{color:c.color, transparency:30} });
    slide.addShape(pres.shapes.RECTANGLE, { x:c.x, y:1.1, w:4.0, h:0.72, fill:{color:c.color}, line:{color:c.color} });
    slide.addText(c.label, { x:c.x+0.1, y:1.1, w:3.8, h:0.72, fontSize:13, bold:true, color:C.white, valign:"middle", margin:0 });
    slide.addText(c.sub, { x:c.x+0.1, y:1.9, w:3.8, h:0.42, fontSize:11, italic:true, color:"BBCCDD" });
    c.diseases.forEach((d,i) => {
      slide.addShape(pres.shapes.RECTANGLE, { x:c.x+0.15, y:2.44+i*0.82, w:3.7, h:0.65, fill:{color:C.white, transparency:18}, line:{color:c.color, transparency:50} });
      slide.addShape(pres.shapes.RECTANGLE, { x:c.x+0.15, y:2.44+i*0.82, w:0.09, h:0.65, fill:{color:c.color}, line:{color:c.color} });
      slide.addText(d, { x:c.x+0.33, y:2.44+i*0.82, w:3.4, h:0.65, fontSize:13, color:C.white, valign:"middle", margin:0 });
    });
  });
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:7.1, w:13.3, h:0.4, fill:{color:C.midBg}, line:{color:C.midBg} });
  slide.addText("Fitzpatrick's Dermatology 9e | Andrews' Diseases of the Skin 12e", {
    x:0.3, y:7.1, w:12.7, h:0.4, fontSize:9, color:"668899", italic:true, valign:"middle"
  });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SECTION A DIVIDER
// ═══════════════════════════════════════════════════════════════════════════════
sectionDivider(
  "SECTION A: SUPERFICIAL INFECTIONS",
  "Epidermis & Stratum Corneum  |  Impetigo · Ecthyma · Erythrasma · Pitted Keratolysis",
  C.superAccent, "0A2E32"
);

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – IMPETIGO
// Layout: left text 0.15–7.9 (two columns), right images 8.1–13.1
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, C.superAccent);
  addCategoryBadge(slide, "A - SUPERFICIAL INFECTIONS", C.superAccent);
  addSlideTitle(slide, "IMPETIGO", C.superAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 300-302  |  Fitzpatrick's Dermatology 9e");

  // Definition strip
  slide.addShape(pres.shapes.RECTANGLE, { x:0.22, y:1.02, w:7.7, h:0.5, fill:{color:C.superAccent, transparency:85}, line:{color:C.superAccent, transparency:50} });
  slide.addText("Most common superficial bacterial skin infection; sub-corneal split; highly contagious", {
    x:0.32, y:1.02, w:7.5, h:0.5, fontSize:12, italic:true, color:C.textDark, valign:"middle"
  });

  // Text boxes: 2 cols each ~3.7" wide
  addLabelBox(slide, 0.22, 1.62, 3.75, 2.65, "ETIOLOGY", C.superAccent, [
    "S. aureus: 50-70% (phage group 2; exfoliative toxins A/B)",
    "S. pyogenes (Group A β-haemolytic) – alone or combined",
    "Bullous: exclusively S. aureus",
    "Neonatal: Group B streptococci",
    "Streptococci early → staphylococci as lesion matures"
  ], 11.5);

  addLabelBox(slide, 4.1, 1.62, 3.8, 2.65, "CLINICAL FEATURES", C.superAccent, [
    "Non-bullous: honey-golden crust on erythematous base",
    "Bullous: large fragile bullae; axillae/groin; face/perineum",
    "Rupture → circinate weepy crusted erosions",
    "Perioral, perinasal most common sites",
    "Regional lymphadenopathy (streptococcal type)"
  ], 11.5);

  addLabelBox(slide, 0.22, 4.42, 3.75, 2.55, "DIFFERENTIAL DIAGNOSIS", C.superAccent, [
    "Tinea corporis – scaling; KOH positive",
    "Herpes simplex – vesicles; recurs at same site",
    "Contact dermatitis – linear; geometric; pruritus",
    "Ecthyma – punched ulcer; heals with scar",
    "Bullous pemphigoid – Nikolsky sign positive"
  ], 11.5);

  addLabelBox(slide, 4.1, 4.42, 3.8, 2.55, "MANAGEMENT & PREVENTION", C.superAccent, [
    "Soak & remove crusts; soap and water cleaning",
    "Topical: Mupirocin 2%, retapamulin, fusidic acid",
    "Oral: Cefalexin or dicloxacillin (widespread/bullous)",
    "MRSA: TMP-SMX or clindamycin",
    "Prevention: hand hygiene; cover lesions; prophylactic ointment",
    "Complication: Post-strep GN 2-5% (treatment does NOT prevent)"
  ], 11.5);

  // Images on right
  slide.addShape(pres.shapes.RECTANGLE, { x:8.05, y:1.02, w:5.05, h:6.0, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText("CLINICAL IMAGES", { x:8.1, y:1.02, w:4.95, h:0.42, fontSize:12, bold:true, color:C.accent, align:"center", valign:"middle" });
  addImageToSlide(slide, "impetigo_nonbullous", 8.1, 1.52, 2.4, 2.55);
  addImageToSlide(slide, "impetigo_bullous",    10.6, 1.52, 2.45, 2.55);
  addImageToSlide(slide, "impetigo_face",       8.1, 4.15, 4.95, 2.8);
  slide.addText("Non-bullous Impetigo", { x:8.1, y:4.05, w:2.4, h:0.2, fontSize:8.5, color:"AACCDD", align:"center" });
  slide.addText("Bullous Impetigo", { x:10.6, y:4.05, w:2.45, h:0.2, fontSize:8.5, color:"AACCDD", align:"center" });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – ECTHYMA
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, C.superAccent);
  addCategoryBadge(slide, "A - SUPERFICIAL INFECTIONS", C.superAccent);
  addSlideTitle(slide, "ECTHYMA", C.superAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 302  |  Fitzpatrick's Dermatology 9e");

  slide.addShape(pres.shapes.RECTANGLE, { x:0.22, y:1.02, w:7.7, h:0.5, fill:{color:C.superAccent, transparency:85}, line:{color:C.superAccent, transparency:50} });
  slide.addText('Ulcerative pyoderma — "impetigo going deeper"; full epidermis into upper dermis; HEALS WITH SCAR', {
    x:0.32, y:1.02, w:7.5, h:0.5, fontSize:12, italic:true, color:C.textDark, valign:"middle"
  });

  addLabelBox(slide, 0.22, 1.62, 3.75, 2.65, "ETIOLOGY & RISK FACTORS", C.superAccent, [
    "S. pyogenes (Group A β-haemolytic) – primary",
    "S. aureus – urban areas, IVDU, HIV patients",
    "Predisposing: malnutrition, uncleanliness, trauma",
    "Debilitated / immunocompromised patients",
    "Lower extremities; insect bites as portal of entry"
  ], 11.5);

  addLabelBox(slide, 4.1, 1.62, 3.8, 2.65, "CLINICAL FEATURES", C.superAccent, [
    "Vesicle/vesicopustule → thick 'oyster-shell' crust",
    "Removal → SAUCER-SHAPED punched-out ulcer",
    "Raised violaceous edges + raw base",
    "Lower extremities and buttocks most common",
    "Local adenopathy; leaves SCAR on healing",
    "Rarely → gangrene in debilitated patients"
  ], 11.5);

  addLabelBox(slide, 0.22, 4.42, 3.75, 2.55, "DIFFERENTIAL DIAGNOSIS", C.superAccent, [
    "Impetigo – superficial; no ulcer; no scar",
    "Herpes simplex – vesicular; grouped; Tzanck+",
    "Ecthyma gangrenosum – Pseudomonas; immunocompromised",
    "Cutaneous leishmaniasis – travel history; smear+",
    "Pyoderma gangrenosum – undermined violaceous edge"
  ], 11.5);

  addLabelBox(slide, 4.1, 4.42, 3.8, 2.55, "MANAGEMENT", C.superAccent, [
    "Warm soaks → gentle crust removal",
    "Topical: mupirocin, retapamulin, bacitracin BD",
    "Oral: Dicloxacillin or cefalexin",
    "MRSA: TMP-SMX or clindamycin",
    "Adjust per culture & sensitivity",
    "Address nutrition, hygiene, immunosuppression"
  ], 11.5);

  // Images
  slide.addShape(pres.shapes.RECTANGLE, { x:8.05, y:1.02, w:5.05, h:6.0, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText("CLINICAL IMAGES", { x:8.1, y:1.02, w:4.95, h:0.42, fontSize:12, bold:true, color:C.accent, align:"center", valign:"middle" });
  addImageToSlide(slide, "ecthyma1", 8.1,  1.52, 4.95, 2.8);
  addImageToSlide(slide, "ecthyma2", 8.1,  4.42, 4.95, 2.55);
  slide.addText("Ecthyma – punched ulcer with crust (Andrews' Atlas)", { x:8.1, y:4.33, w:4.95, h:0.18, fontSize:8, color:"AACCDD", align:"center" });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – ERYTHRASMA
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, C.superAccent);
  addCategoryBadge(slide, "A - SUPERFICIAL INFECTIONS", C.superAccent);
  addSlideTitle(slide, "ERYTHRASMA", C.superAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 337-348  |  Fitzpatrick's Dermatology 9e, p. 2771");

  slide.addShape(pres.shapes.RECTANGLE, { x:0.22, y:1.02, w:7.7, h:0.5, fill:{color:C.superAccent, transparency:85}, line:{color:C.superAccent, transparency:50} });
  slide.addText("Superficial infection of the stratum corneum in intertriginous areas — Corynebacterium minutissimum", {
    x:0.32, y:1.02, w:7.5, h:0.5, fontSize:12, italic:true, color:C.textDark, valign:"middle"
  });

  addLabelBox(slide, 0.22, 1.62, 3.75, 2.65, "ETIOLOGY", C.superAccent, [
    "Corynebacterium minutissimum (gram+ diphtheroid rod)",
    "Produces coproporphyrin III → coral-red fluorescence",
    "More common: tropical climates, obesity, DM, HIV",
    "Males > Females",
    "Immunocompromised: may cause bacteremia, cellulitis"
  ], 11.5);

  addLabelBox(slide, 4.1, 1.62, 3.8, 2.65, "CLINICAL FEATURES", C.superAccent, [
    "Toe webs: white hyperkeratotic macerated plaque",
    "Genitocrural/axillae/inframammary: reddish-brown patch",
    "'Cigarette paper' thin; finely scaled; well-demarcated",
    "No central clearing (unlike tinea)",
    "Usually asymptomatic; KEY: Wood's lamp CORAL-RED",
    "Wash before exam may eliminate fluorescence!"
  ], 11.5);

  addLabelBox(slide, 0.22, 4.42, 3.75, 2.55, "DIFFERENTIAL DIAGNOSIS", C.superAccent, [
    "Tinea cruris – KOH positive; central clearing; scale",
    "Candidal intertrigo – satellite pustules; KOH+",
    "Intertrigo – no Wood's lamp fluorescence",
    "Inverse psoriasis – smooth; psoriasis elsewhere",
    "Seborrheic dermatitis – yellow greasy scales"
  ], 11.5);

  addLabelBox(slide, 4.1, 4.42, 3.8, 2.55, "MANAGEMENT", C.superAccent, [
    "Topical: erythromycin or clindamycin – first-line",
    "Topical fusidic acid – alternative",
    "Oral (widespread): Clarithromycin 1 g SINGLE DOSE",
    "OR Erythromycin 250 mg QID × 14 days",
    "Prevention: keep dry; weight loss; control DM",
    "Absorbent powders; loose-fitting clothing"
  ], 11.5);

  // Images
  slide.addShape(pres.shapes.RECTANGLE, { x:8.05, y:1.02, w:5.05, h:6.0, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText("CLINICAL IMAGES", { x:8.1, y:1.02, w:4.95, h:0.42, fontSize:12, bold:true, color:C.accent, align:"center", valign:"middle" });
  addImageToSlide(slide, "erythrasma1", 8.1,  1.52, 4.95, 2.8);
  addImageToSlide(slide, "erythrasma2", 8.1,  4.42, 4.95, 2.55);
  slide.addText("Erythrasma – reddish-brown intertriginous patch (Andrews' Atlas)", { x:8.1, y:4.33, w:4.95, h:0.18, fontSize:8, color:"AACCDD", align:"center" });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – PITTED KERATOLYSIS
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, C.superAccent);
  addCategoryBadge(slide, "A - SUPERFICIAL INFECTIONS", C.superAccent);
  addSlideTitle(slide, "PITTED KERATOLYSIS", C.superAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 397-406  |  Fitzpatrick's Dermatology 9e, p. 2770");

  slide.addShape(pres.shapes.RECTANGLE, { x:0.22, y:1.02, w:7.7, h:0.5, fill:{color:C.superAccent, transparency:85}, line:{color:C.superAccent, transparency:50} });
  slide.addText("Bacterial infection of plantar stratum corneum; crateriform pits on pressure-bearing areas; characteristic malodour", {
    x:0.32, y:1.02, w:7.5, h:0.5, fontSize:12, italic:true, color:C.textDark, valign:"middle"
  });

  addLabelBox(slide, 0.22, 1.62, 3.75, 2.65, "ETIOLOGY", C.superAccent, [
    "Kytococcus sedentarius – primary organism",
    "Also: Dermatophilus congolensis, Corynebacterium spp.",
    "Serine proteases degrade plantar keratin",
    "Male : Female ≈ 8:1; tropical climates",
    "Hyperhidrosis + occlusive footwear = key risk factors"
  ], 11.5);

  addLabelBox(slide, 4.1, 1.62, 3.8, 2.65, "CLINICAL FEATURES", C.superAccent, [
    "1–3 mm crateriform pits on pressure-bearing soles",
    "Pits coalesce → large defect with serpiginous borders",
    "Ball of foot, heel, plantar toes; web spaces",
    "Characteristic MALODOUR (2/3 of patients)",
    "Feet stick to socks – sliminess (70%)",
    "Pain/burning/irritation (1/3 of patients)"
  ], 11.5);

  addLabelBox(slide, 0.22, 4.42, 3.75, 2.55, "DIFFERENTIAL DIAGNOSIS", C.superAccent, [
    "Tinea pedis – KOH positive; scaling; vesicles",
    "Verruca plantaris – interrupted skin lines",
    "Palmoplantar keratoderma – diffuse; hereditary",
    "Interdigital erythrasma – Wood's lamp coral-red",
    "Plantar psoriasis – silvery scale; nail changes"
  ], 11.5);

  addLabelBox(slide, 4.1, 4.42, 3.8, 2.55, "MANAGEMENT", C.superAccent, [
    "Topical erythromycin – first-line (curative)",
    "Topical clindamycin or mupirocin",
    "5% benzoyl peroxide gel",
    "10-20% aluminium chloride (hyperhidrosis)",
    "Botulinum toxin if severe hyperhidrosis",
    "Prevention: dry feet; breathable footwear; foot powder"
  ], 11.5);

  // Images
  slide.addShape(pres.shapes.RECTANGLE, { x:8.05, y:1.02, w:5.05, h:6.0, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText("CLINICAL IMAGES", { x:8.1, y:1.02, w:4.95, h:0.42, fontSize:12, bold:true, color:C.accent, align:"center", valign:"middle" });
  addImageToSlide(slide, "pitted1", 8.1, 1.52, 4.95, 2.8);
  addImageToSlide(slide, "pitted2", 8.1, 4.42, 4.95, 2.55);
  slide.addText("Pitted Keratolysis – plantar pits (Andrews' Atlas)", { x:8.1, y:4.33, w:4.95, h:0.18, fontSize:8, color:"AACCDD", align:"center" });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SECTION B DIVIDER
// ═══════════════════════════════════════════════════════════════════════════════
sectionDivider(
  "SECTION B: FOLLICULAR INFECTIONS",
  "Hair Follicle as Primary Target  |  Folliculitis · Sycosis Barbae · Furunculosis · Carbuncle",
  C.follAccent, "2B1800"
);

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – FOLLICULITIS
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, C.follAccent);
  addCategoryBadge(slide, "B - FOLLICULAR INFECTIONS", C.follAccent);
  addSlideTitle(slide, "FOLLICULITIS  (including SYCOSIS BARBAE)", C.follAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 301-302  |  Fitzpatrick's Dermatology 9e");

  slide.addShape(pres.shapes.RECTANGLE, { x:0.22, y:1.02, w:7.7, h:0.5, fill:{color:C.follAccent, transparency:88}, line:{color:C.follAccent, transparency:50} });
  slide.addText("Infection/inflammation of hair follicles – superficial (ostium) or deep (entire follicle + perifollicular tissue)", {
    x:0.32, y:1.02, w:7.5, h:0.5, fontSize:12, italic:true, color:C.textDark, valign:"middle"
  });

  addLabelBox(slide, 0.22, 1.62, 3.75, 2.65, "ETIOLOGY", C.follAccent, [
    "S. aureus – most common (MRSA increasingly)",
    "Pseudomonas aeruginosa – hot tub folliculitis",
    "Gram-negatives – after prolonged acne antibiotics",
    "Malassezia spp. – Pityrosporum folliculitis",
    "Demodex spp. – Demodex folliculitis"
  ], 11.5);

  addLabelBox(slide, 4.1, 1.62, 3.8, 2.65, "CLINICAL FEATURES", C.follAccent, [
    "Superficial (Bockhart): thin yellow-white pustule at follicle; crops",
    "Deep staph: any hair-bearing site; trunk; axillae; pubis",
    "Sycosis barbae: chronic pustules in beard; upper lip first",
    "Burning/itching; may scar; blepharitis in severe cases",
    "Genital folliculitis may be STD transmitted"
  ], 11.5);

  addLabelBox(slide, 0.22, 4.42, 3.75, 2.55, "DIFFERENTIAL DIAGNOSIS", C.follAccent, [
    "Tinea barbae – KOH+; spares upper lip",
    "Acne vulgaris – comedones; no hair-piercing pustule",
    "Pseudofolliculitis barbae – ingrown hairs; Black men",
    "HSV sycosis – vesicles; short duration; Tzanck+",
    "Rosacea – flushing; telangiectasia; no infection"
  ], 11.5);

  addLabelBox(slide, 4.1, 4.42, 3.8, 2.55, "MANAGEMENT", C.follAccent, [
    "Topical: mupirocin, clindamycin, retapamulin",
    "Benzoyl peroxide 5-10% wash; chlorhexidine 4%",
    "Bleach baths (½ cup/40-gallon tub)",
    "Systemic: cefalexin; if MRSA: TMP-SMX or clindamycin",
    "Decolonisation: mupirocin nares × 5 days per month",
    "Aluminium chloride – chronic buttock folliculitis"
  ], 11.5);

  // Images
  slide.addShape(pres.shapes.RECTANGLE, { x:8.05, y:1.02, w:5.05, h:6.0, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText("CLINICAL IMAGES", { x:8.1, y:1.02, w:4.95, h:0.42, fontSize:12, bold:true, color:C.gold, align:"center", valign:"middle" });
  addImageToSlide(slide, "folliculitis1",        8.1,  1.52, 2.4,  2.55);
  addImageToSlide(slide, "folliculitis2",        10.6, 1.52, 2.45, 2.55);
  addImageToSlide(slide, "folliculitis_buttock", 8.1,  4.15, 4.95, 2.8);
  slide.addText("Staphylococcal folliculitis", { x:8.1, y:4.06, w:2.4, h:0.18, fontSize:8, color:"AACCDD", align:"center" });
  slide.addText("Perifollicular pustule", { x:10.6, y:4.06, w:2.45, h:0.18, fontSize:8, color:"AACCDD", align:"center" });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – FURUNCULOSIS & CARBUNCLE
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, C.follAccent);
  addCategoryBadge(slide, "B - FOLLICULAR INFECTIONS", C.follAccent);
  addSlideTitle(slide, "FURUNCULOSIS & CARBUNCLE", C.follAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 302-303  |  Fitzpatrick's Dermatology 9e");

  slide.addShape(pres.shapes.RECTANGLE, { x:0.22, y:1.02, w:7.7, h:0.5, fill:{color:C.follAccent, transparency:88}, line:{color:C.follAccent, transparency:50} });
  slide.addText("Furuncle: acute perifollicular abscess + central suppuration  |  Carbuncle: confluent furuncles with multiple heads", {
    x:0.32, y:1.02, w:7.5, h:0.5, fontSize:12, italic:true, color:C.textDark, valign:"middle"
  });

  addLabelBox(slide, 0.22, 1.62, 3.75, 2.65, "ETIOLOGY & RISK FACTORS", C.follAccent, [
    "S. aureus – principal (MRSA increasingly common)",
    "Nasal/perineal carriage – key reservoir",
    "Risk: DM, atopic dermatitis, HIV/AIDS, dialysis",
    "Alcoholism, malnutrition, blood dyscrasias",
    "Hospital-acquired MRSA – multidrug resistant"
  ], 11.5);

  addLabelBox(slide, 4.1, 1.62, 3.8, 2.65, "CLINICAL FEATURES", C.follAccent, [
    "Acute round tender perifollicular abscess",
    "Sites: nape, axillae, buttocks, face",
    "⚠ DANGER ZONE: upper lip & nose (cavernous sinus!)",
    "Central necrosis → rupture with purulent discharge",
    "Carbuncle: multiple heads; fever; malaise; scars",
    "Recurrences common; autoinoculation from carrier"
  ], 11.5);

  addLabelBox(slide, 0.22, 4.42, 3.75, 2.55, "DIFFERENTIAL DIAGNOSIS", C.follAccent, [
    "Hidradenitis suppurativa – tunnels; axillae/groins; scar",
    "Infected sebaceous cyst – cheesy material; no follicular",
    "Cystic acne – face; comedones; chronic",
    "Cutaneous anthrax – eschar; exposure history",
    "Lymphadenitis – deeper; no skin origin"
  ], 11.5);

  addLabelBox(slide, 4.1, 4.42, 3.8, 2.55, "MANAGEMENT", C.follAccent, [
    "Warm compresses – pre-fluctuant early lesions",
    "I&D – definitive for fluctuant abscess (even <5 cm)",
    "RCT: I&D + clindamycin or TMP-SMX > I&D alone",
    "MSSA: dicloxacillin or cefalexin",
    "MRSA: TMP-SMX, clindamycin, doxycycline",
    "Facial furuncles: IV antibiotics; DO NOT SQUEEZE"
  ], 11.5);

  // Images
  slide.addShape(pres.shapes.RECTANGLE, { x:8.05, y:1.02, w:5.05, h:6.0, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText("CLINICAL IMAGES", { x:8.1, y:1.02, w:4.95, h:0.42, fontSize:12, bold:true, color:C.gold, align:"center", valign:"middle" });
  addImageToSlide(slide, "furuncle1", 8.1,  1.52, 4.95, 2.8);
  addImageToSlide(slide, "furuncle2", 8.1,  4.42, 4.95, 2.55);
  slide.addText("Staphylococcal abscess/furuncle (Andrews' Atlas)", { x:8.1, y:4.33, w:4.95, h:0.18, fontSize:8, color:"AACCDD", align:"center" });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – FURUNCULOSIS PREVENTION
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, C.follAccent);
  addCategoryBadge(slide, "B - FOLLICULAR INFECTIONS", C.follAccent);
  addSlideTitle(slide, "FURUNCULOSIS — PREVENTION & DECOLONISATION", C.follAccent);
  addBottomBar(slide, "Andrews' Diseases of the Skin, p. 303");

  addLabelBox(slide, 0.22, 1.0, 6.1, 5.9, "HYGIENE & SKIN CARE", C.follAccent, [
    "Daily 4% chlorhexidine wash (axillae, groin, perianal) × 1 week",
    "Bleach baths (sodium hypochlorite 0.005%): ½ cup/40-gallon tub, 3×/week",
    "Launder bedding and clothing daily (initially)",
    "Frequent handwashing throughout the day",
    "Avoid sharing towels, clothing, razors, sports equipment",
    "Do NOT share moisturiser containers (re-inoculation in AD)",
    "Keep fingernails short and clean",
    "Aggressively treat atopic dermatitis (S. aureus carrier)"
  ], 12.5);

  addLabelBox(slide, 6.8, 1.0, 6.28, 5.9, "DECOLONISATION REGIMENS", C.follAccent, [
    "Mupirocin ointment to anterior nares BD × 5 days; repeat monthly",
    "MSSA regimen: Rifampin 10 days + Dicloxacillin (concurrent)",
    "MRSA regimen: Rifampin 10 days + TMP-SMX (concurrent)",
    "Long-term suppression: Clindamycin low-dose × 3 months",
    "Bacitracin nares BD throughout isotretinoin therapy",
    "Treat all household members and close contacts",
    "Repeat cultures to confirm eradication",
    "Indications: recurrent infections; spread to contacts; high-risk household"
  ], 12.5);
}

// ═══════════════════════════════════════════════════════════════════════════════
// SECTION C DIVIDER
// ═══════════════════════════════════════════════════════════════════════════════
sectionDivider(
  "SECTION C: DERMAL & SUBCUTANEOUS INFECTIONS",
  "Deep Dermis & Subcutaneous Tissue  |  Erysipelas · Cellulitis",
  C.dermAccent, "1A0B2E"
);

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – ERYSIPELAS
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, C.dermAccent);
  addCategoryBadge(slide, "C - DERMAL & SUBCUTANEOUS", C.dermAccent);
  addSlideTitle(slide, "ERYSIPELAS", C.dermAccent);
  addBottomBar(slide, "Fitzpatrick's Dermatology 9e, Ch. 151, p. 2775  |  IDSA Guidelines 2014");

  slide.addShape(pres.shapes.RECTANGLE, { x:0.22, y:1.02, w:7.7, h:0.5, fill:{color:C.dermAccent, transparency:88}, line:{color:C.dermAccent, transparency:50} });
  slide.addText("Superficial dermis + lymphatics; SHARPLY DEMARCATED raised borders — more superficial than cellulitis", {
    x:0.32, y:1.02, w:7.5, h:0.5, fontSize:12, italic:true, color:C.textDark, valign:"middle"
  });

  addLabelBox(slide, 0.22, 1.62, 3.75, 2.65, "ETIOLOGY", C.dermAccent, [
    "S. pyogenes (Group A β-haemolytic) – classic",
    "Recent data: similar microbial profile to cellulitis",
    "Groups B, C, G streptococci – less common",
    "Portal of entry in 62% (toe web infections most common)",
    "Risk: lymphedema, obesity, previous episodes, DM"
  ], 11.5);

  addLabelBox(slide, 4.1, 1.62, 3.8, 2.65, "CLINICAL FEATURES", C.dermAccent, [
    "Salmon-red warm painful edematous plaque",
    "KEY: SHARP, RAISED, PALPABLE BORDER",
    "Peau d'orange surface appearance",
    "Lower leg 76-90%; face; upper extremity",
    "Fever, chills, malaise more prominent than cellulitis",
    "Facial: butterfly distribution across cheeks/nose"
  ], 11.5);

  addLabelBox(slide, 0.22, 4.42, 3.75, 2.55, "DIFFERENTIAL DIAGNOSIS", C.dermAccent, [
    "Cellulitis – ill-defined border (KEY difference)",
    "Necrotizing fasciitis – crepitus; anesthesia – EMERGENCY",
    "Contact dermatitis – scaling; pruritus; no fever",
    "Angioedema – bilateral; no erythema; no fever",
    "Herpes zoster pre-vesicular – dermatomal"
  ], 11.5);

  addLabelBox(slide, 4.1, 4.42, 3.8, 2.55, "MANAGEMENT & PREVENTION", C.dermAccent, [
    "Mild/outpatient: Penicillin V or amoxicillin oral",
    "Moderate/severe: Benzylpenicillin IV",
    "Penicillin allergy: clindamycin or macrolides",
    "Elevate affected limb; mark advancing border",
    "Prophylaxis (recurrence): Penicillin V 250 mg BD",
    "Treat predisposing factors (tinea pedis, lymphedema)"
  ], 11.5);

  // Images
  slide.addShape(pres.shapes.RECTANGLE, { x:8.05, y:1.02, w:5.05, h:6.0, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText("CLINICAL IMAGES", { x:8.1, y:1.02, w:4.95, h:0.42, fontSize:12, bold:true, color:"CC88EE", align:"center", valign:"middle" });
  addImageToSlide(slide, "erysipelas_face", 8.1,  1.52, 4.95, 2.8);
  addImageToSlide(slide, "erysipelas_ear",  8.1,  4.42, 4.95, 2.55);
  slide.addText("Erysipelas – sharp demarcated border (Andrews' Atlas)", { x:8.1, y:4.33, w:4.95, h:0.18, fontSize:8, color:"AACCDD", align:"center" });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – CELLULITIS
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, C.dermAccent);
  addCategoryBadge(slide, "C - DERMAL & SUBCUTANEOUS", C.dermAccent);
  addSlideTitle(slide, "CELLULITIS", C.dermAccent);
  addBottomBar(slide, "Fitzpatrick's Dermatology 9e, Ch. 151, p. 2775-2783  |  IDSA Guidelines 2014");

  slide.addShape(pres.shapes.RECTANGLE, { x:0.22, y:1.02, w:7.7, h:0.5, fill:{color:C.dermAccent, transparency:88}, line:{color:C.dermAccent, transparency:50} });
  slide.addText("Deep dermis + subcutaneous tissue; ILL-DEFINED erythema; almost always UNILATERAL; lower extremity most common", {
    x:0.32, y:1.02, w:7.5, h:0.5, fontSize:12, italic:true, color:C.textDark, valign:"middle"
  });

  addLabelBox(slide, 0.22, 1.62, 3.75, 2.65, "ETIOLOGY", C.dermAccent, [
    "S. pyogenes + S. aureus (MRSA) – most common",
    "Organism found in <1/3 of cases",
    "Bite wounds: Pasteurella, Eikenella, Capnocytophaga",
    "Aquatic: Aeromonas, Vibrio vulnificus, M. marinum",
    "Immunocompromised: gram-negatives, Pseudomonas, fungi"
  ], 11.5);

  addLabelBox(slide, 4.1, 1.62, 3.8, 2.65, "CLINICAL FEATURES", C.dermAccent, [
    "Spreading ILL-DEFINED erythema, oedema, warmth, pain",
    "ALMOST ALWAYS UNILATERAL (bilateral → seek other dx)",
    "Lower extremity in adults; face in children",
    "Lymphangitis; skip areas; peau d'orange",
    "⚠ Crepitus/anesthesia → NECROTISING FASCIITIS",
    "ALT-70 score helps diagnose (see separate slide)"
  ], 11.5);

  addLabelBox(slide, 0.22, 4.42, 3.75, 2.55, "DIFFERENTIAL DIAGNOSIS", C.dermAccent, [
    "DVT / stasis dermatitis – bilateral; chronic; scaling",
    "Lipodermatosclerosis – inverted champagne bottle leg",
    "Gout/pseudogout – overlies joint; crystals",
    "Erythema migrans – annular; tick exposure",
    "Necrotizing fasciitis – EXCLUDE URGENTLY"
  ], 11.5);

  addLabelBox(slide, 4.1, 4.42, 3.8, 2.55, "MANAGEMENT", C.dermAccent, [
    "Outpatient non-purulent: cefalexin, dicloxacillin",
    "Outpatient purulent/MRSA: TMP-SMX, clindamycin",
    "Inpatient IV: cefazolin; vancomycin (MRSA)",
    "Severe/polymicrobial: pip-tazo or imipenem",
    "Elevate limb; mark border; serial photography",
    "Prophylaxis ≥3 episodes/year: Penicillin V 250 mg BD"
  ], 11.5);

  // Images
  slide.addShape(pres.shapes.RECTANGLE, { x:8.05, y:1.02, w:5.05, h:6.0, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText("CLINICAL IMAGES", { x:8.1, y:1.02, w:4.95, h:0.42, fontSize:12, bold:true, color:"CC88EE", align:"center", valign:"middle" });
  addImageToSlide(slide, "cellulitis1", 8.1,  1.52, 4.95, 2.8);
  addImageToSlide(slide, "cellulitis2", 8.1,  4.42, 4.95, 2.55);
  slide.addText("Cellulitis – lower limb + lymphangitis (Andrews' Atlas)", { x:8.1, y:4.33, w:4.95, h:0.18, fontSize:8, color:"AACCDD", align:"center" });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – CELLULITIS DIAGNOSIS / ALT-70
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addDividerBar(slide, C.dermAccent);
  addCategoryBadge(slide, "C - DERMAL & SUBCUTANEOUS", C.dermAccent);
  addSlideTitle(slide, "CELLULITIS — DIAGNOSIS & ALT-70 PREDICTION SCORE", C.dermAccent);
  addBottomBar(slide, "Fitzpatrick's Dermatology 9e, p. 2780-2781  |  IDSA 2014  |  Misdiagnosis rate >30%");

  // ALT-70 box
  slide.addShape(pres.shapes.RECTANGLE, { x:0.22, y:1.0, w:6.1, h:6.0, fill:{color:C.white}, line:{color:C.dermAccent, transparency:30},
    shadow:{type:"outer",color:"000000",blur:4,offset:1,angle:135,opacity:0.1} });
  slide.addShape(pres.shapes.RECTANGLE, { x:0.22, y:1.0, w:6.1, h:0.5, fill:{color:C.dermAccent}, line:{color:C.dermAccent} });
  slide.addText("ALT-70 RISK PREDICTION SCORE", { x:0.3, y:1.0, w:5.9, h:0.5, fontSize:13, bold:true, color:C.white, valign:"middle", margin:0 });

  const altRows = [
    [{text:"PARAMETER",options:{bold:true,color:C.white,fill:{color:C.textMid}}}, {text:"POINTS",options:{bold:true,color:C.white,fill:{color:C.textMid}}}],
    ["Asymmetry (unilateral involvement)", {text:"3 pts",options:{bold:true,color:C.dermAccent}}],
    ["Leukocytosis ≥ 10,000 cells/μL",     {text:"1 pt", options:{bold:true,color:C.dermAccent}}],
    ["Tachycardia ≥ 90 beats/min",          {text:"1 pt", options:{bold:true,color:C.dermAccent}}],
    ["Age ≥ 70 years",                      {text:"2 pts",options:{bold:true,color:C.dermAccent}}],
  ];
  slide.addTable(altRows, { x:0.35, y:1.6, w:5.85, h:2.0, border:{pt:0.5,color:"CCDDEE"}, fill:{color:"F5FAFF"}, colW:[4.1,1.75], fontSize:11.5 });

  slide.addShape(pres.shapes.RECTANGLE, { x:0.35, y:3.72, w:5.85, h:0.52, fill:{color:"E8F5F6"}, line:{color:C.dermAccent, transparency:50} });
  slide.addText("Score 0-2 → NPV > 83% (likely NOT cellulitis)", { x:0.45, y:3.74, w:5.65, h:0.25, fontSize:11, color:C.textDark });
  slide.addText("Score ≥ 5  → PPV > 82% (likely IS cellulitis)",  { x:0.45, y:3.98, w:5.65, h:0.25, fontSize:11, color:C.textDark });

  slide.addShape(pres.shapes.RECTANGLE, { x:0.35, y:4.32, w:5.85, h:0.4, fill:{color:C.dermAccent, transparency:85}, line:{color:C.dermAccent, transparency:60} });
  slide.addText("SUPPORTIVE INVESTIGATIONS (IDSA 2014)", { x:0.45, y:4.32, w:5.65, h:0.4, fontSize:11, bold:true, color:C.dermAccent, valign:"middle", margin:0 });
  const diagLines = [
    "CBC: leukocytosis in 34-50% (non-specific)",
    "ESR/CRP elevated in >75% (non-specific)",
    "Blood cultures: positive in only ~5% — reserve for high-risk",
    "Skin aspirate: low yield (5-40%); not routinely recommended",
    "IDSA 2014: do NOT routinely culture blood or swabs",
    "Abscess/pustule: culture recommended",
    "Ultrasound: identifies fluid collections for I&D guidance",
    "MRI: differentiates from necrotising fasciitis"
  ];
  slide.addText(diagLines.map((t,i)=>({text:t,options:{bullet:{type:"bullet"},breakLine:i<diagLines.length-1,fontSize:11,color:C.textDark}})),
    { x:0.38, y:4.78, w:5.95, h:2.1, valign:"top", margin:0 });

  // DDx table right
  slide.addShape(pres.shapes.RECTANGLE, { x:6.8, y:1.0, w:6.28, h:6.0, fill:{color:C.white}, line:{color:C.dermAccent, transparency:30},
    shadow:{type:"outer",color:"000000",blur:4,offset:1,angle:135,opacity:0.1} });
  slide.addShape(pres.shapes.RECTANGLE, { x:6.8, y:1.0, w:6.28, h:0.5, fill:{color:C.dermAccent}, line:{color:C.dermAccent} });
  slide.addText("PSEUDOCELLULITIS — COMMON MIMICS", { x:6.88, y:1.0, w:6.1, h:0.5, fontSize:13, bold:true, color:C.white, valign:"middle", margin:0 });

  const ddxRows = [
    [{text:"CONDITION",options:{bold:true,color:C.white,fill:{color:C.textMid}}}, {text:"KEY DISTINGUISHING FEATURE",options:{bold:true,color:C.white,fill:{color:C.textMid}}}],
    ["DVT / post-thrombotic","Duplex USS; bilateral possible; no surface erythema"],
    ["Stasis dermatitis","Bilateral; scaling; pruritus; chronic course"],
    ["Lipodermatosclerosis","Inverted champagne bottle; fibrous; no fever"],
    ["Contact dermatitis","Geometric borders; pruritus; no fever"],
    ["Gout / pseudogout","Overlies joint; crystal aspiration positive"],
    ["Erythema migrans","Annular; tick exposure; endemic area"],
    ["Erythema nodosum","Tender nodules; bilateral shins; no purulence"],
    ["Necrotizing fasciitis ⚠","Crepitus; anesthesia; RAPID spread → EMERGENCY"],
  ];
  slide.addTable(ddxRows, { x:6.9, y:1.6, w:6.05, h:5.3, border:{pt:0.5,color:"CCDDEE"}, fill:{color:"F8F2FF"}, colW:[2.5,3.55], fontSize:10.5 });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – COMPARATIVE SUMMARY TABLE
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:13.3, h:0.18, fill:{color:C.accent}, line:{color:C.accent} });
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0.18, w:13.3, h:0.75, fill:{color:C.darkBg}, line:{color:C.darkBg} });
  slide.addText("COMPARATIVE SUMMARY — ALL DISEASES BY DEPTH", { x:0.3, y:0.18, w:12.8, h:0.75, fontSize:21, bold:true, color:C.white, valign:"middle", margin:0 });

  const rows = [
    [{text:"DISEASE",options:{bold:true,color:C.white,fill:{color:C.darkBg}}},
     {text:"CATEGORY",options:{bold:true,color:C.white,fill:{color:C.darkBg}}},
     {text:"DEPTH",options:{bold:true,color:C.white,fill:{color:C.darkBg}}},
     {text:"ORGANISM",options:{bold:true,color:C.white,fill:{color:C.darkBg}}},
     {text:"KEY LESION",options:{bold:true,color:C.white,fill:{color:C.darkBg}}},
     {text:"DX PEARL",options:{bold:true,color:C.white,fill:{color:C.darkBg}}},
     {text:"1st LINE Rx",options:{bold:true,color:C.white,fill:{color:C.darkBg}}}],
    [{text:"Impetigo",options:{fill:{color:"E0F7F8"}}},{text:"Superficial",options:{fill:{color:"E0F7F8"},color:"007A80",bold:true}},"Sub-corneal / intra-epidermal","S. aureus / S. pyogenes","Honey-golden crust","Culture; Tzanck","Mupirocin / Cefalexin"],
    [{text:"Ecthyma",options:{fill:{color:"E0F7F8"}}},{text:"Superficial",options:{fill:{color:"E0F7F8"},color:"007A80",bold:true}},"Full epidermis → upper dermis","S. pyogenes / S. aureus","Punched-out ulcer + thick crust","Clinical; culture","Dicloxacillin / Cefalexin"],
    [{text:"Erythrasma",options:{fill:{color:"E0F7F8"}}},{text:"Superficial",options:{fill:{color:"E0F7F8"},color:"007A80",bold:true}},"Stratum corneum (intertriginous)","C. minutissimum","Brown intertriginous patch","Wood's lamp: coral-red","Erythromycin topical / Clarithromycin 1g"],
    [{text:"Pitted Keratolysis",options:{fill:{color:"E0F7F8"}}},{text:"Superficial",options:{fill:{color:"E0F7F8"},color:"007A80",bold:true}},"Stratum corneum (plantar)","K. sedentarius","Plantar pits + malodour","Clinical","Topical erythromycin"],
    [{text:"Folliculitis",options:{fill:{color:"FFF3E0"}}},{text:"Follicular",options:{fill:{color:"FFF3E0"},color:"B35A00",bold:true}},"Follicular ostium / deep","S. aureus (MRSA)","Perifollicular pustule","Culture","Mupirocin topical / Cefalexin"],
    [{text:"Furunculosis",options:{fill:{color:"FFF3E0"}}},{text:"Follicular",options:{fill:{color:"FFF3E0"},color:"B35A00",bold:true}},"Perifollicular dermis","S. aureus / MRSA","Fluctuant abscess","Culture; I&D","I&D + TMP-SMX / Clindamycin"],
    [{text:"Carbuncle",options:{fill:{color:"FFF3E0"}}},{text:"Follicular",options:{fill:{color:"FFF3E0"},color:"B35A00",bold:true}},"Confluent follicular → deep dermis","S. aureus / MRSA","Multi-headed abscess","Culture; systemic signs","I&D + IV antibiotics if severe"],
    [{text:"Erysipelas",options:{fill:{color:"F3E5F5"}}},{text:"Dermal/Subcut.",options:{fill:{color:"F3E5F5"},color:"6A0080",bold:true}},"Superficial dermis + lymphatics","S. pyogenes","SHARP-BORDERED red plaque","Sharp raised palpable edge","Penicillin V / Benzylpenicillin IV"],
    [{text:"Cellulitis",options:{fill:{color:"F3E5F5"}}},{text:"Dermal/Subcut.",options:{fill:{color:"F3E5F5"},color:"6A0080",bold:true}},"Deep dermis + subcutaneous","S. pyogenes / S. aureus / MRSA","ILL-DEFINED erythema","ALT-70 score; clinical","Cefalexin / Vancomycin (MRSA)"],
  ];

  slide.addTable(rows, { x:0.15, y:1.02, w:13.0, h:6.3, border:{pt:0.5,color:"CCDDEE"}, colW:[1.5,1.35,1.85,2.0,1.8,1.9,2.6], fontSize:9.5, autoPage:false });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – ANATOMICAL DEPTH DIAGRAM
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.darkBg };
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:13.3, h:0.18, fill:{color:C.accent}, line:{color:C.accent} });
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0.18, w:13.3, h:0.7, fill:{color:C.midBg}, line:{color:C.midBg} });
  slide.addText("ANATOMICAL DEPTH — DISEASE MAPPING", { x:0.3, y:0.18, w:12.8, h:0.7, fontSize:22, bold:true, color:C.white, valign:"middle", margin:0 });

  const layers = [
    { label:"Stratum Corneum",       y:1.0,  h:0.8,  color:"F5C842", textColor:C.darkBg },
    { label:"Epidermis",             y:1.8,  h:0.9,  color:"F5A623", textColor:C.white  },
    { label:"Dermis (Superficial)",  y:2.7,  h:1.0,  color:"E87040", textColor:C.white  },
    { label:"Dermis (Deep)",         y:3.7,  h:1.0,  color:"CC4A20", textColor:C.white  },
    { label:"Subcutaneous Tissue",   y:4.7,  h:1.0,  color:"9B3010", textColor:C.white  },
    { label:"Fascia / Muscle",       y:5.7,  h:0.75, color:"6B1B08", textColor:"FF9999" },
  ];
  layers.forEach(l => {
    slide.addShape(pres.shapes.RECTANGLE, { x:0.2, y:l.y, w:3.0, h:l.h, fill:{color:l.color}, line:{color:l.color} });
    slide.addText(l.label, { x:0.25, y:l.y, w:2.9, h:l.h, fontSize:11, bold:true, color:l.textColor, valign:"middle", align:"center", margin:0 });
  });

  const dls = [
    { text:"Pitted Keratolysis · Erythrasma",           y:1.05,  color:C.superAccent },
    { text:"Impetigo (non-bullous + bullous) · Ecthyma (begins here)", y:1.88, color:C.superAccent },
    { text:"Folliculitis (superficial) · Sycosis Barbae · Ecthyma (extends) · Erysipelas", y:2.75, color:C.follAccent  },
    { text:"Furunculosis · Carbuncle · Cellulitis (involves this layer)", y:3.75, color:C.dermAccent  },
    { text:"Cellulitis (extends here) · Severe carbuncle", y:4.78, color:C.dermAccent  },
    { text:"Necrotising Fasciitis (NOT covered — surgical emergency)", y:5.78, color:"FF6B6B"  },
  ];
  dls.forEach(d => {
    slide.addShape(pres.shapes.RECTANGLE, { x:3.4, y:d.y, w:0.05, h:0.62, fill:{color:d.color}, line:{color:d.color} });
    slide.addText(d.text, { x:3.55, y:d.y, w:9.5, h:0.62, fontSize:11.5, color:d.color, valign:"middle", margin:0 });
  });

  const legends = [
    {label:"SUPERFICIAL",color:C.superAccent,x:0.3},
    {label:"FOLLICULAR",color:C.follAccent,x:4.2},
    {label:"DERMAL / SUBCUTANEOUS",color:C.dermAccent,x:7.8},
  ];
  legends.forEach(l => {
    slide.addShape(pres.shapes.RECTANGLE, { x:l.x, y:6.92, w:0.32, h:0.32, fill:{color:l.color}, line:{color:l.color} });
    slide.addText(l.label, { x:l.x+0.38, y:6.92, w:3.2, h:0.32, fontSize:10.5, color:l.color, valign:"middle", margin:0 });
  });
}

// ═══════════════════════════════════════════════════════════════════════════════
// SLIDE – REFERENCES
// ═══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.darkBg };
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:13.3, h:0.18, fill:{color:C.gold}, line:{color:C.gold} });
  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:0.18, w:13.3, h:0.75, fill:{color:C.midBg}, line:{color:C.midBg} });
  slide.addText("REFERENCES", { x:0.4, y:0.18, w:12.5, h:0.75, fontSize:26, bold:true, color:C.white, charSpacing:4, valign:"middle" });

  const refs = [
    "1.  James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM. Andrews' Diseases of the Skin: Clinical Dermatology. 13th ed. Elsevier; 2020. ISBN 9780323547536. Chapters 14, pp. 297–310.",
    "2.  Andrews' Diseases of the Skin Clinical Atlas. 2nd ed. Elsevier; 2018. ISBN 9780323790130. Chapter 14.",
    "3.  Kang S, Amagai M, Bruckner AL, et al. Fitzpatrick's Dermatology. 9th ed. McGraw-Hill; 2019. ISBN 9780071837781. Ch.150 (pp.2768–2774) & Ch.151 (pp.2775–2786).",
    "4.  Stevens DL, Bisno AL, Chambers HF, et al. Practice guidelines for the diagnosis and management of skin and soft tissue infections: 2014 update by the IDSA. Clin Infect Dis. 2014;59(2):e10–e52.",
    "5.  Jacka J, Sierla R, Kilbreath SL. Systematic Review of Cellulitis Guidelines: Non-Pharmacological Management in Preventing Recurrence. Australas J Dermatol. 2025. PMID 40530782.",
    "6.  Rho NK, Kim BJ. A corynebacterial triad: pitted keratolysis, trichomycosis axillaris, and erythrasma. J Am Acad Dermatol. 2008;58(5 Suppl 1):S57–S58.",
  ];
  refs.forEach((r,i) => {
    slide.addText(r, { x:0.4, y:1.1+i*0.9, w:12.5, h:0.8, fontSize:11.5, color:"AACCDD", valign:"top" });
  });

  slide.addShape(pres.shapes.RECTANGLE, { x:0, y:7.1, w:13.3, h:0.4, fill:{color:C.accent}, line:{color:C.accent} });
  slide.addText("Common Cutaneous Bacterial Infections  |  Evidence-Based Review  |  " + new Date().getFullYear(), {
    x:0.3, y:7.1, w:12.7, h:0.4, fontSize:10, color:C.white, align:"center", valign:"middle"
  });
}

// ─── WRITE ────────────────────────────────────────────────────────────────────
pres.writeFile({ fileName: "/home/daytona/workspace/cutaneous-infections-ppt/Cutaneous_Bacterial_Infections_v2.pptx" })
  .then(() => console.log("✅ PPT v2 created successfully"))
  .catch(e => { console.error("❌ Error:", e); process.exit(1); });

const pptxgen = require("pptxgenjs");
const { execSync } = require("child_process");

// ─── IMAGE URLS ───────────────────────────────────────────────────────────────
const imageUrls = {
  furuncle_abscess1: "https://cdn.orris.care/cdss_images/22025a8573ba0e5a6596f9ce843a97c9e56f6aaaeaaf374992daf796b4e22dcb.png", // hairy skin abscess
  furuncle_abscess2: "https://cdn.orris.care/cdss_images/81eb40b7082d5c2d5ca38cc2e06797ed66b217c3f7d8aaae0db3d4aaa9039061.png", // chest abscess
  furuncle_abscess3: "https://cdn.orris.care/cdss_images/272ec8c8d7508c7b992494c5a8314f60396b6d8f346210db436d6f951dd0f43c.png", // genital area abscess
  folliculitis_deep: "https://cdn.orris.care/cdss_images/40388c8adeef18745048cab0a9be8afb2a191bbb871af16062706a09ae33db44.png", // deep folliculitis (for carbuncle section)
  buttock_foll:      "https://cdn.orris.care/cdss_images/75baef6779e4aef72312a7d067ba6c93d0faf0128577e7d96020d2ca99fc72b7.png", // buttock confluent lesions
};

console.log("Fetching images...");
const urlArgs = Object.values(imageUrls).map(u => `"${u}"`).join(" ");
let imgData = {};
try {
  const raw = execSync(
    `node /home/daytona/skills/shared/scripts/fetch_images.js ${urlArgs}`,
    { maxBuffer: 30 * 1024 * 1024, timeout: 60000 }
  ).toString();
  const arr = JSON.parse(raw);
  Object.keys(imageUrls).forEach((k, i) => {
    imgData[k] = (arr[i] && !arr[i].error) ? arr[i].base64 : null;
  });
} catch(e) {
  console.error("Image fetch error:", e.message);
  Object.keys(imageUrls).forEach(k => imgData[k] = null);
}
console.log("Images fetched:", Object.values(imgData).filter(Boolean).length, "/", Object.keys(imgData).length);

// ─── PPT SETUP ────────────────────────────────────────────────────────────────
const pres = new pptxgen();
pres.layout = "LAYOUT_WIDE"; // 13.3" x 7.5"
pres.title = "Furuncle & Carbuncle";

const C = {
  darkBg:     "0D2B45",
  midBg:      "1A4A6E",
  accent:     "E8930A",   // warm amber for follicular section
  accentDark: "B36200",
  accentPale: "FFF3E0",
  gold:       "E8B84B",
  white:      "FFFFFF",
  offWhite:   "FDF8F0",
  textDark:   "1A1A2E",
  textMid:    "3D2B00",
  danger:     "C0392B",
  dangerPale: "FDECEA",
  green:      "1E8449",
  greenPale:  "E9F7EF",
};

function addImg(slide, key, x, y, w, h) {
  if (imgData[key]) slide.addImage({ data: imgData[key], x, y, w, h });
}

function addBar(slide, x, y, w, h, color) {
  slide.addShape(pres.shapes.RECTANGLE, { x, y, w, h, fill: { color }, line: { color } });
}

function labelBox(slide, x, y, w, h, title, titleColor, bgColor, lines, fs) {
  const fontSize = fs || 12;
  slide.addShape(pres.shapes.RECTANGLE, {
    x, y, w, h, fill: { color: bgColor || C.white },
    line: { color: titleColor, transparency: 35 },
    shadow: { type: "outer", color: "000000", blur: 5, offset: 2, angle: 135, opacity: 0.12 }
  });
  // title bar
  addBar(slide, x, y, w, 0.46, titleColor);
  slide.addText(title, {
    x: x + 0.1, y, w: w - 0.15, h: 0.46,
    fontSize: fontSize + 0.5, bold: true, color: C.white, valign: "middle", margin: 0
  });
  // left accent stripe
  addBar(slide, x, y + 0.46, 0.08, h - 0.46, titleColor);
  if (lines && lines.length) {
    slide.addText(
      lines.map((t, i) => ({
        text: t,
        options: {
          bullet: { type: "bullet", indent: 12 },
          breakLine: i < lines.length - 1,
          fontSize,
          color: C.textDark,
          paraSpaceAfter: 2
        }
      })),
      { x: x + 0.2, y: y + 0.5, w: w - 0.28, h: h - 0.56, valign: "top", margin: 0 }
    );
  }
}

function warningBox(slide, x, y, w, h, lines, fs) {
  slide.addShape(pres.shapes.RECTANGLE, {
    x, y, w, h, fill: { color: C.dangerPale },
    line: { color: C.danger, transparency: 20 },
    shadow: { type: "outer", color: "000000", blur: 4, offset: 1, angle: 135, opacity: 0.1 }
  });
  addBar(slide, x, y, 0.08, h, C.danger);
  addBar(slide, x, y, w, 0.42, C.danger);
  slide.addText("⚠  WARNING / DANGER ZONES", {
    x: x + 0.12, y, w: w - 0.15, h: 0.42,
    fontSize: (fs || 12) + 0.5, bold: true, color: C.white, valign: "middle", margin: 0
  });
  slide.addText(
    lines.map((t, i) => ({
      text: t,
      options: { bullet: { type: "bullet", indent: 12 }, breakLine: i < lines.length - 1, fontSize: fs || 12, color: C.danger }
    })),
    { x: x + 0.2, y: y + 0.48, w: w - 0.28, h: h - 0.54, valign: "top", margin: 0 }
  );
}

function greenBox(slide, x, y, w, h, title, lines, fs) {
  slide.addShape(pres.shapes.RECTANGLE, {
    x, y, w, h, fill: { color: C.greenPale },
    line: { color: C.green, transparency: 30 },
    shadow: { type: "outer", color: "000000", blur: 4, offset: 1, angle: 135, opacity: 0.1 }
  });
  addBar(slide, x, y, 0.08, h, C.green);
  addBar(slide, x, y, w, 0.46, C.green);
  slide.addText(title, {
    x: x + 0.12, y, w: w - 0.15, h: 0.46,
    fontSize: (fs || 12) + 0.5, bold: true, color: C.white, valign: "middle", margin: 0
  });
  slide.addText(
    lines.map((t, i) => ({
      text: t,
      options: { bullet: { type: "bullet", indent: 12 }, breakLine: i < lines.length - 1, fontSize: fs || 12, color: C.green }
    })),
    { x: x + 0.2, y: y + 0.5, w: w - 0.28, h: h - 0.56, valign: "top", margin: 0 }
  );
}

// ══════════════════════════════════════════════════════════════════════════════
// SLIDE 1 — TITLE
// ══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.darkBg };

  addBar(slide, 0, 0, 13.3, 0.2, C.accent);
  addBar(slide, 0, 0.2, 5.0, 7.3, C.midBg);

  // decorative circles
  slide.addShape(pres.shapes.OVAL, { x: 0.4, y: 0.9, w: 3.0, h: 3.0, fill: { color: C.accent, transparency: 82 }, line: { color: C.accent, transparency: 82 } });
  slide.addShape(pres.shapes.OVAL, { x: 1.8, y: 4.2, w: 1.8, h: 1.8, fill: { color: C.gold, transparency: 84 }, line: { color: C.gold, transparency: 84 } });

  // category badges
  const badges = [
    { label: "FOLLICULAR INFECTION", color: C.accent, y: 2.3 },
    { label: "STAPHYLOCOCCAL ABSCESS", color: C.accentDark, y: 3.0 },
    { label: "B: DEEP FOLLICULAR CATEGORY", color: "5D4037", y: 3.7 },
  ];
  badges.forEach(b => {
    addBar(slide, 0.35, b.y, 4.1, 0.5, b.color);
    slide.addText(b.label, { x: 0.35, y: b.y, w: 4.1, h: 0.5, fontSize: 12, bold: true, color: C.white, align: "center", valign: "middle", margin: 0 });
  });

  slide.addText("FURUNCLE", {
    x: 5.3, y: 1.1, w: 7.6, h: 1.1,
    fontSize: 52, bold: true, color: C.accent, fontFace: "Calibri", charSpacing: 3
  });
  slide.addText("& CARBUNCLE", {
    x: 5.3, y: 2.15, w: 7.6, h: 1.0,
    fontSize: 46, bold: true, color: C.white, fontFace: "Calibri", charSpacing: 3
  });
  addBar(slide, 5.3, 3.25, 7.6, 0.06, C.gold);
  slide.addText("Perifollicular Staphylococcal Abscess — Separately Described", {
    x: 5.3, y: 3.38, w: 7.6, h: 0.58,
    fontSize: 17, italic: true, color: "AACCDD"
  });
  slide.addText([
    { text: "References: ", options: { bold: true } },
    { text: "Andrews' Diseases of the Skin 12e  |  Fitzpatrick's Dermatology 9e  |  IDSA Guidelines 2014" }
  ], { x: 5.3, y: 4.15, w: 7.6, h: 0.45, fontSize: 11, color: "88AABB" });

  addBar(slide, 0, 7.1, 13.3, 0.4, C.accent);
}

// ══════════════════════════════════════════════════════════════════════════════
// SLIDE 2 — FURUNCLE (Definition, Etiology, Pathogenesis)
// ══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addBar(slide, 0, 0, 0.14, 7.5, C.accent);

  // Category badge
  addBar(slide, 0.22, 0.1, 3.5, 0.48, C.accent);
  slide.addText("B - FOLLICULAR INFECTIONS", { x: 0.22, y: 0.1, w: 3.5, h: 0.48, fontSize: 10, bold: true, color: C.white, align: "center", valign: "middle", margin: 0 });

  // Slide title
  addBar(slide, 0.14, 0.08, 13.16, 0.82, C.darkBg);
  slide.addText("FURUNCLE (BOIL) — DEFINITION, ETIOLOGY & PATHOGENESIS", {
    x: 0.3, y: 0.08, w: 12.8, h: 0.82, fontSize: 22, bold: true, color: C.white, valign: "middle", margin: 0
  });
  addBar(slide, 0.14, 0.9, 13.16, 0.07, C.accent);

  // Definition banner
  slide.addShape(pres.shapes.RECTANGLE, { x: 0.22, y: 1.04, w: 12.86, h: 0.58, fill: { color: C.accent, transparency: 85 }, line: { color: C.accent, transparency: 50 } });
  slide.addText([
    { text: "DEFINITION: ", options: { bold: true, color: C.accentDark } },
    { text: "An acute, round, tender, circumscribed, PERIFOLLICULAR staphylococcal abscess that generally ends in central suppuration. Involves the hair follicle AND the surrounding dermis.", options: { color: C.textDark } }
  ], { x: 0.32, y: 1.04, w: 12.6, h: 0.58, fontSize: 12.5, valign: "middle" });

  // 4 boxes: 2 left, image right
  labelBox(slide, 0.22, 1.72, 3.9, 2.55, "ETIOLOGY", C.accent, C.white, [
    "Staphylococcus aureus – principal causative organism",
    "Community-acquired MRSA increasingly common",
    "Hospital-acquired MRSA – often multidrug-resistant",
    "Nasal/perineal carriage = key endogenous reservoir",
    "Contagion or autoinoculation from carrier sites"
  ], 12);

  labelBox(slide, 4.25, 1.72, 3.9, 2.55, "PATHOGENESIS", C.accent, C.white, [
    "Begins in hair follicle → extends into perifollicular tissue",
    "Barrier compromise → portal of entry for S. aureus",
    "Triggers: friction, pressure, shaving, hyperhidrosis",
    "Dermatitis/dermatophytosis – predispose to follicular breach",
    "Lesions: central necrosis → suppuration → rupture",
    "Discharge of purulent/necrotic debris on rupture"
  ], 12);

  labelBox(slide, 0.22, 4.35, 3.9, 2.55, "RISK FACTORS / PREDISPOSING CONDITIONS", C.accent, C.white, [
    "Diabetes mellitus – most important systemic RF",
    "Atopic dermatitis – promotes S. aureus nasal carriage",
    "HIV/AIDS and iatrogenic immunosuppression",
    "Alcoholism and malnutrition",
    "Renal dialysis; isotretinoin/acitretin therapy",
    "Blood dyscrasias; neutrophil dysfunction disorders"
  ], 12);

  labelBox(slide, 4.25, 4.35, 3.9, 2.55, "SITES OF PREDILECTION", C.accent, C.white, [
    "Nape of neck (most common)",
    "Axillae and buttocks",
    "Face – especially beard area",
    "⚠ Upper lip and nose – DANGER AREA",
    "⚠ External auditory canal – avoid blind I&D",
    "Thighs, pubic region, perianal area"
  ], 12);

  // Image panel right
  addBar(slide, 8.3, 1.04, 4.88, 5.86, C.darkBg);
  slide.addText("CLINICAL IMAGES — FURUNCLE", { x: 8.35, y: 1.04, w: 4.78, h: 0.45, fontSize: 12, bold: true, color: C.accent, align: "center", valign: "middle" });
  addImg(slide, "furuncle_abscess1", 8.35, 1.56, 4.78, 2.65);
  addImg(slide, "furuncle_abscess2", 8.35, 4.28, 4.78, 2.55);
  slide.addText("Furuncle – perifollicular abscess (Andrews' Atlas, Fig. 14.9)", { x: 8.35, y: 4.19, w: 4.78, h: 0.18, fontSize: 8.5, color: "AACCDD", align: "center" });

  // Bottom bar
  addBar(slide, 0, 7.1, 13.3, 0.4, C.darkBg);
  slide.addText("Andrews' Diseases of the Skin, p. 302-303  |  Fitzpatrick's Dermatology 9e", { x: 0.2, y: 7.1, w: 12.8, h: 0.4, fontSize: 9.5, color: "99BBCC", italic: true, valign: "middle" });
}

// ══════════════════════════════════════════════════════════════════════════════
// SLIDE 3 — FURUNCLE (Clinical Features, DDx)
// ══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addBar(slide, 0, 0, 0.14, 7.5, C.accent);
  addBar(slide, 0.22, 0.1, 3.5, 0.48, C.accent);
  slide.addText("B - FOLLICULAR INFECTIONS", { x: 0.22, y: 0.1, w: 3.5, h: 0.48, fontSize: 10, bold: true, color: C.white, align: "center", valign: "middle", margin: 0 });
  addBar(slide, 0.14, 0.08, 13.16, 0.82, C.darkBg);
  slide.addText("FURUNCLE — CLINICAL FEATURES & DIFFERENTIAL DIAGNOSIS", {
    x: 0.3, y: 0.08, w: 12.8, h: 0.82, fontSize: 22, bold: true, color: C.white, valign: "middle", margin: 0
  });
  addBar(slide, 0.14, 0.9, 13.16, 0.07, C.accent);

  labelBox(slide, 0.22, 1.04, 7.95, 3.1, "CLINICAL FEATURES", C.accent, C.white, [
    "Acute, round, tender, warm, indurated nodule around a hair follicle",
    "Begins as firm, painful erythematous nodule → becomes fluctuant",
    "Central necrosis develops → 'pointing' of the abscess",
    "Rupture with discharge of yellow-green pus and necrotic core",
    "Surrounding erythema and oedema; satellite lesions may develop",
    "Fever and lymphadenopathy – especially in carbuncle or facial furuncle",
    "Recurrences common due to persistent nasal/perineal carriage",
    "Facial furuncles: risk of cavernous sinus thrombosis via facial veins"
  ], 12.5);

  // Stages box
  slide.addShape(pres.shapes.RECTANGLE, { x: 0.22, y: 4.24, w: 7.95, h: 2.65, fill: { color: C.white }, line: { color: C.accent, transparency: 35 }, shadow: { type: "outer", color: "000000", blur: 5, offset: 2, angle: 135, opacity: 0.1 } });
  addBar(slide, 0.22, 4.24, 7.95, 0.46, C.accentDark);
  slide.addText("STAGES OF A FURUNCLE", { x: 0.32, y: 4.24, w: 7.75, h: 0.46, fontSize: 13, bold: true, color: C.white, valign: "middle", margin: 0 });

  const stages = [
    { n: "1", label: "Early / Incipient", desc: "Firm erythematous nodule; no fluctuation; warm compresses + oral antibiotics", color: "E8930A" },
    { n: "2", label: "Suppurative", desc: "Softening; fluctuation develops; abscess localized; I&D now indicated", color: "CC6600" },
    { n: "3", label: "Pointing/Rupture", desc: "Spontaneous rupture; purulent + necrotic discharge; wound care + antibiotics", color: "AA4400" },
    { n: "4", label: "Resolving", desc: "Granulation tissue; scar formation; decolonisation to prevent recurrence", color: "882200" },
  ];
  stages.forEach((s, i) => {
    const sx = 0.35 + i * 1.97;
    addBar(slide, sx, 4.78, 1.82, 0.38, s.color);
    slide.addText(`STAGE ${s.n}: ${s.label}`, { x: sx, y: 4.78, w: 1.82, h: 0.38, fontSize: 9.5, bold: true, color: C.white, align: "center", valign: "middle", margin: 0 });
    slide.addText(s.desc, { x: sx + 0.04, y: 5.22, w: 1.74, h: 1.58, fontSize: 10, color: C.textDark, valign: "top", margin: 0 });
  });

  // DDx table right
  slide.addShape(pres.shapes.RECTANGLE, { x: 8.3, y: 1.04, w: 4.88, h: 5.86, fill: { color: C.white }, line: { color: C.accent, transparency: 35 }, shadow: { type: "outer", color: "000000", blur: 5, offset: 2, angle: 135, opacity: 0.1 } });
  addBar(slide, 8.3, 1.04, 4.88, 0.46, C.accentDark);
  slide.addText("DIFFERENTIAL DIAGNOSIS", { x: 8.4, y: 1.04, w: 4.68, h: 0.46, fontSize: 13, bold: true, color: C.white, valign: "middle", margin: 0 });

  const ddx = [
    ["Hidradenitis suppurativa", "Axillae/groins; tunnels; recurrent; comedones; scarring"],
    ["Infected sebaceous cyst", "Pre-existing cyst; cheesy caseous material; no follicular origin"],
    ["Cystic acne", "Face; comedones; chronic; multiple lesions; no nasal carriage"],
    ["Carbuncle", "Confluent furuncles with multiple heads; more systemic signs"],
    ["Cutaneous anthrax", "Eschar; painless; exposure history; oedema"],
    ["Inflamed EIC", "Prior cyst; rupture; no central necrotic core"],
    ["Lymphadenitis", "Deeper structure; no follicular origin; firm nodes"],
    ["Erysipelas/cellulitis", "No abscess; ill-defined erythema; no fluctuance"],
  ];
  const ddxRows = [
    [{ text: "CONDITION", options: { bold: true, color: C.white, fill: { color: C.textMid } } },
     { text: "DISTINGUISHING FEATURE", options: { bold: true, color: C.white, fill: { color: C.textMid } } }],
    ...ddx.map(r => r)
  ];
  slide.addTable(ddxRows, { x: 8.35, y: 1.58, w: 4.78, h: 5.25, border: { pt: 0.5, color: "DDCCAA" }, fill: { color: "FFFBF5" }, colW: [1.8, 2.98], fontSize: 10.5 });

  addBar(slide, 0, 7.1, 13.3, 0.4, C.darkBg);
  slide.addText("Andrews' Diseases of the Skin, p. 302-303  |  Fitzpatrick's Dermatology 9e", { x: 0.2, y: 7.1, w: 12.8, h: 0.4, fontSize: 9.5, color: "99BBCC", italic: true, valign: "middle" });
}

// ══════════════════════════════════════════════════════════════════════════════
// SLIDE 4 — FURUNCLE (Management & Prevention)
// ══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addBar(slide, 0, 0, 0.14, 7.5, C.accent);
  addBar(slide, 0.22, 0.1, 3.5, 0.48, C.accent);
  slide.addText("B - FOLLICULAR INFECTIONS", { x: 0.22, y: 0.1, w: 3.5, h: 0.48, fontSize: 10, bold: true, color: C.white, align: "center", valign: "middle", margin: 0 });
  addBar(slide, 0.14, 0.08, 13.16, 0.82, C.darkBg);
  slide.addText("FURUNCLE — MANAGEMENT & PREVENTION", {
    x: 0.3, y: 0.08, w: 12.8, h: 0.82, fontSize: 22, bold: true, color: C.white, valign: "middle", margin: 0
  });
  addBar(slide, 0.14, 0.9, 13.16, 0.07, C.accent);

  // Surgical management
  labelBox(slide, 0.22, 1.04, 4.0, 2.8, "SURGICAL MANAGEMENT", C.accent, C.white, [
    "Pre-fluctuant: warm compresses + oral antibiotics (no I&D yet)",
    "Hot wet soaks: aluminium acetate 1:20 dilution",
    "Fluctuant furuncle: INCISION & DRAINAGE (I&D) – definitive",
    "RCT evidence: I&D + antibiotics > I&D alone (even for <5 cm)",
    "Facial/nasal/ear canal furuncles: avoid I&D; treat medically",
    "Anhydrous aluminium chloride (Drysol) – chronic buttock disease"
  ], 12);

  // Antibiotic management
  labelBox(slide, 4.35, 1.04, 4.05, 2.8, "ANTIBIOTIC THERAPY", C.accent, C.white, [
    "MSSA: Dicloxacillin or Cefalexin (first-gen cephalosporin)",
    "MRSA (community): TMP-SMX or Clindamycin – first-line",
    "MRSA alternatives: Doxycycline, Minocycline, Linezolid",
    "Rifampin: NOT used alone; combine for carriage eradication",
    "Adjust all therapy based on culture & sensitivity results",
    "IV antibiotics: facial furuncles; systemic sepsis; immunocompromised"
  ], 12);

  // Danger zone
  warningBox(slide, 0.22, 3.95, 8.18, 2.95, [
    "Upper lip & nose furuncles: drain via facial veins → cavernous sinus → CAVERNOUS SINUS THROMBOSIS",
    "External auditory canal: spontaneous drainage common; antibiotic ointment first; systemic antibiotics; avoid forceful I&D",
    "NEVER squeeze facial furuncles – squeezing propels infected emboli into intracranial venous sinuses",
    "Fever + facial furuncle + altered sensorium → emergency – IV antibiotics + CT head immediately"
  ], 12);

  // Prevention
  greenBox(slide, 8.52, 1.04, 4.58, 5.86, "PREVENTION & DECOLONISATION", [
    "Daily 4% chlorhexidine wash – axillae, groin, perianal",
    "Bleach baths 3×/week: ½ cup/40-gallon tub (0.005% NaOCl)",
    "Mupirocin to anterior nares BD × 5 days; repeat monthly",
    "Launder bedding and clothing daily (initially)",
    "No sharing of towels, razors, clothing",
    "Do NOT share moisturiser containers (AD re-inoculation)",
    "MSSA carriage: Rifampin 10d + Dicloxacillin",
    "MRSA carriage: Rifampin 10d + TMP-SMX",
    "Long-term: low-dose Clindamycin × 3 months",
    "Treat atopic dermatitis aggressively",
    "Treat all household contacts/members",
    "Repeat cultures after decolonisation to confirm eradication"
  ], 12);

  addBar(slide, 0, 7.1, 13.3, 0.4, C.darkBg);
  slide.addText("Andrews' Diseases of the Skin, p. 302-303  |  IDSA Guidelines 2014", { x: 0.2, y: 7.1, w: 12.8, h: 0.4, fontSize: 9.5, color: "99BBCC", italic: true, valign: "middle" });
}

// ══════════════════════════════════════════════════════════════════════════════
// SLIDE 5 — CARBUNCLE SECTION DIVIDER
// ══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: "1C0A00" };
  addBar(slide, 0, 0, 0.6, 7.5, C.accentDark);
  slide.addShape(pres.shapes.RECTANGLE, { x: 0.6, y: 0, w: 5.2, h: 7.5, fill: { color: C.accentDark, transparency: 88 }, line: { color: C.accentDark, transparency: 88 } });
  slide.addText("CARBUNCLE", { x: 1.4, y: 2.0, w: 11.5, h: 1.5, fontSize: 58, bold: true, color: C.white, fontFace: "Calibri" });
  slide.addText("Confluent furuncles with multiple heads — deeper, more severe, systemic involvement common", {
    x: 1.4, y: 3.65, w: 11.2, h: 0.75, fontSize: 17, italic: true, color: "FFDDAA"
  });
  slide.addShape(pres.shapes.RECTANGLE, { x: 1.4, y: 3.55, w: 11.2, h: 0.05, fill: { color: C.gold }, line: { color: C.gold } });
  slide.addText("B: FOLLICULAR INFECTIONS  |  Andrews' Diseases of the Skin  |  Fitzpatrick's Dermatology 9e", {
    x: 1.4, y: 4.55, w: 11.2, h: 0.45, fontSize: 12, color: "AACCDD", italic: true
  });
}

// ══════════════════════════════════════════════════════════════════════════════
// SLIDE 6 — CARBUNCLE (Definition, Etiology, Clinical)
// ══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addBar(slide, 0, 0, 0.14, 7.5, C.accentDark);
  addBar(slide, 0.22, 0.1, 3.5, 0.48, C.accentDark);
  slide.addText("B - FOLLICULAR INFECTIONS", { x: 0.22, y: 0.1, w: 3.5, h: 0.48, fontSize: 10, bold: true, color: C.white, align: "center", valign: "middle", margin: 0 });
  addBar(slide, 0.14, 0.08, 13.16, 0.82, C.darkBg);
  slide.addText("CARBUNCLE — DEFINITION, ETIOLOGY & CLINICAL FEATURES", {
    x: 0.3, y: 0.08, w: 12.8, h: 0.82, fontSize: 22, bold: true, color: C.white, valign: "middle", margin: 0
  });
  addBar(slide, 0.14, 0.9, 13.16, 0.07, C.accentDark);

  // Definition + vs furuncle comparison
  slide.addShape(pres.shapes.RECTANGLE, { x: 0.22, y: 1.04, w: 12.86, h: 0.64, fill: { color: C.accentDark, transparency: 85 }, line: { color: C.accentDark, transparency: 50 } });
  slide.addText([
    { text: "DEFINITION: ", options: { bold: true, color: C.accentDark } },
    { text: "A carbuncle is two or more confluent furuncles, each with a SEPARATE head, forming a large deep painful abscess with multiple draining sinuses. More severe than a single furuncle with prominent systemic features.", options: { color: C.textDark } }
  ], { x: 0.32, y: 1.04, w: 12.6, h: 0.64, fontSize: 12.5, valign: "middle" });

  // Furuncle vs carbuncle comparison table
  slide.addShape(pres.shapes.RECTANGLE, { x: 0.22, y: 1.76, w: 7.95, h: 3.5, fill: { color: C.white }, line: { color: C.accentDark, transparency: 35 }, shadow: { type: "outer", color: "000000", blur: 5, offset: 2, angle: 135, opacity: 0.1 } });
  addBar(slide, 0.22, 1.76, 7.95, 0.46, C.accentDark);
  slide.addText("FURUNCLE vs CARBUNCLE — KEY DIFFERENCES", { x: 0.32, y: 1.76, w: 7.75, h: 0.46, fontSize: 13, bold: true, color: C.white, valign: "middle", margin: 0 });

  const compareRows = [
    [{ text: "FEATURE", options: { bold: true, color: C.white, fill: { color: "4A2000" } } },
     { text: "FURUNCLE", options: { bold: true, color: C.white, fill: { color: C.accent } } },
     { text: "CARBUNCLE", options: { bold: true, color: C.white, fill: { color: C.accentDark } } }],
    ["Definition", "Single perifollicular abscess", "≥2 confluent furuncles; multiple heads"],
    ["Depth", "Deep dermis + perifollicular", "Extends into subcutaneous fat"],
    ["Discharge", "Single draining point", "Multiple draining sinuses"],
    ["Systemic signs", "Usually absent", "Fever, malaise, chills common"],
    ["Scarring", "Small scar on healing", "Significant scarring"],
    ["Common site", "Nape, axillae, buttocks", "Nape of neck most common"],
    ["Management", "I&D ± antibiotics", "I&D + systemic antibiotics; may need IV"],
  ];
  slide.addTable(compareRows, { x: 0.3, y: 2.3, w: 7.8, h: 2.88, border: { pt: 0.5, color: "DDCCAA" }, fill: { color: "FFFBF5" }, colW: [2.0, 2.85, 2.95], fontSize: 11 });

  labelBox(slide, 0.22, 5.35, 7.95, 1.65, "ETIOLOGY & PATHOGENESIS", C.accentDark, C.white, [
    "S. aureus (MRSA increasingly common) – as per furuncle",
    "Develops from multiple adjacent follicular infections coalescing",
    "Extends deeply through dermis into subcutaneous fat",
    "Multiple loculi formed → multiple drainage points on surface"
  ], 12);

  // Image panel
  addBar(slide, 8.3, 1.04, 4.88, 5.96, C.darkBg);
  slide.addText("CLINICAL IMAGES", { x: 8.35, y: 1.04, w: 4.78, h: 0.45, fontSize: 12, bold: true, color: C.gold, align: "center", valign: "middle" });
  addImg(slide, "furuncle_abscess1", 8.35, 1.56, 4.78, 2.55);
  addImg(slide, "buttock_foll",      8.35, 4.2,  4.78, 2.73);
  slide.addText("Confluent furuncular lesions – multiple heads (Andrews' Atlas)", { x: 8.35, y: 4.12, w: 4.78, h: 0.18, fontSize: 8.5, color: "AACCDD", align: "center" });

  addBar(slide, 0, 7.1, 13.3, 0.4, C.darkBg);
  slide.addText("Andrews' Diseases of the Skin, p. 302-303  |  Fitzpatrick's Dermatology 9e", { x: 0.2, y: 7.1, w: 12.8, h: 0.4, fontSize: 9.5, color: "99BBCC", italic: true, valign: "middle" });
}

// ══════════════════════════════════════════════════════════════════════════════
// SLIDE 7 — CARBUNCLE (DDx, Management, Prevention)
// ══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.offWhite };
  addBar(slide, 0, 0, 0.14, 7.5, C.accentDark);
  addBar(slide, 0.22, 0.1, 3.5, 0.48, C.accentDark);
  slide.addText("B - FOLLICULAR INFECTIONS", { x: 0.22, y: 0.1, w: 3.5, h: 0.48, fontSize: 10, bold: true, color: C.white, align: "center", valign: "middle", margin: 0 });
  addBar(slide, 0.14, 0.08, 13.16, 0.82, C.darkBg);
  slide.addText("CARBUNCLE — DIFFERENTIAL DIAGNOSIS, MANAGEMENT & PREVENTION", {
    x: 0.3, y: 0.08, w: 12.8, h: 0.82, fontSize: 21, bold: true, color: C.white, valign: "middle", margin: 0
  });
  addBar(slide, 0.14, 0.9, 13.16, 0.07, C.accentDark);

  labelBox(slide, 0.22, 1.04, 4.0, 3.1, "DIFFERENTIAL DIAGNOSIS", C.accentDark, C.white, [
    "Single large furuncle – no multiple heads",
    "Hidradenitis suppurativa – tunnels; axillae/groins; chronic",
    "Infected sebaceous cyst – cheesy material; no follicular",
    "Cutaneous anthrax – eschar; painless; oedema; exposure Hx",
    "Cellulitis – no abscess; ill-defined erythema; no fluctuance",
    "Pilonidal abscess – natal cleft; midline pits; hair tuft",
    "Actinomycosis – jaw/neck; sulfur granules; indolent"
  ], 12);

  labelBox(slide, 4.35, 1.04, 4.05, 3.1, "SURGICAL MANAGEMENT", C.accentDark, C.white, [
    "I&D is mandatory – multiple loculi must be broken down",
    "Wide incision; break all loculations; thorough drainage",
    "Wound packing may be required after drainage",
    "Wound irrigation with normal saline",
    "Mark surrounding erythema to monitor response",
    "Refer large/complicated carbuncles to surgeon",
    "CT/MRI if deep extension suspected"
  ], 12);

  labelBox(slide, 0.22, 4.24, 4.0, 2.75, "ANTIBIOTIC THERAPY", C.accentDark, C.white, [
    "Systemic antibiotics always required (unlike simple furuncle)",
    "MSSA: Dicloxacillin or Cefalexin oral",
    "MRSA: TMP-SMX or Clindamycin oral",
    "Severe/septic: IV Vancomycin (MRSA) or Nafcillin (MSSA)",
    "Adjust per culture & sensitivity results",
    "Duration: typically 5-7 days after adequate drainage"
  ], 12);

  labelBox(slide, 4.35, 4.24, 4.05, 2.75, "SUPPORTIVE MEASURES", C.accentDark, C.white, [
    "Bed rest; adequate hydration; analgesia",
    "Warm moist compresses to aid pointing pre-I&D",
    "Wound care post-I&D: daily dressing changes",
    "Monitor for systemic sepsis – blood cultures if febrile",
    "Echocardiogram if bacteraemia suspected",
    "Screen for diabetes mellitus if recurrent"
  ], 12);

  greenBox(slide, 8.52, 1.04, 4.58, 5.96, "PREVENTION (same as Furuncle)", [
    "Daily 4% chlorhexidine wash (axillae, groin, perianal)",
    "Bleach baths 3×/week: ½ cup/40-gallon tub",
    "Mupirocin nares BD × 5 days; repeat monthly",
    "Daily laundering of bedding and clothing",
    "No sharing personal items (towels, razors)",
    "Treat all household contacts",
    "MSSA carriage: Rifampin + Dicloxacillin × 10 days",
    "MRSA carriage: Rifampin + TMP-SMX × 10 days",
    "Low-dose Clindamycin × 3 months (recurrent disease)",
    "Screen for and control DM",
    "Treat atopic dermatitis aggressively",
    "Isotretinoin patients: bacitracin nares BD throughout therapy"
  ], 12);

  addBar(slide, 0, 7.1, 13.3, 0.4, C.darkBg);
  slide.addText("Andrews' Diseases of the Skin, p. 302-303  |  IDSA Guidelines 2014", { x: 0.2, y: 7.1, w: 12.8, h: 0.4, fontSize: 9.5, color: "99BBCC", italic: true, valign: "middle" });
}

// ══════════════════════════════════════════════════════════════════════════════
// SLIDE 8 — SUMMARY COMPARISON
// ══════════════════════════════════════════════════════════════════════════════
{
  const slide = pres.addSlide();
  slide.background = { color: C.darkBg };
  addBar(slide, 0, 0, 13.3, 0.2, C.accent);
  addBar(slide, 0, 0.2, 13.3, 0.72, C.midBg);
  slide.addText("FURUNCLE vs CARBUNCLE — COMPREHENSIVE SUMMARY", {
    x: 0.4, y: 0.2, w: 12.5, h: 0.72, fontSize: 23, bold: true, color: C.white, valign: "middle"
  });

  // Two large panels side by side
  // FURUNCLE panel
  addBar(slide, 0.2, 1.02, 6.3, 0.5, C.accent);
  slide.addText("FURUNCLE  (Boil)", { x: 0.3, y: 1.02, w: 6.1, h: 0.5, fontSize: 16, bold: true, color: C.white, valign: "middle", margin: 0 });
  slide.addShape(pres.shapes.RECTANGLE, { x: 0.2, y: 1.52, w: 6.3, h: 5.48, fill: { color: "FFF8F0" }, line: { color: C.accent, transparency: 30 } });

  const furRows = [
    [{ text: "ASPECT", options: { bold: true, fill: { color: "4A2800" }, color: C.white } }, { text: "DETAIL", options: { bold: true, fill: { color: "4A2800" }, color: C.white } }],
    ["Definition", "Single perifollicular abscess; central suppuration"],
    ["Organism", "S. aureus (MRSA increasingly common)"],
    ["Depth", "Perifollicular dermis"],
    ["Discharge", "Single draining point"],
    ["Sites", "Nape, axillae, buttocks, face"],
    ["DANGER ZONE", "Upper lip & nose → cavernous sinus thrombosis"],
    ["Systemic signs", "Usually absent unless facial/severe"],
    ["I&D", "When fluctuant (even <5 cm)"],
    ["Antibiotics", "MSSA: Dicloxacillin | MRSA: TMP-SMX or Clindamycin"],
    ["Prevention", "Chlorhexidine wash + bleach baths + mupirocin nares"],
    ["Complication", "Spread → carbuncle; bacteraemia; osteomyelitis"],
  ];
  slide.addTable(furRows, { x: 0.28, y: 1.6, w: 6.15, h: 5.35, border: { pt: 0.5, color: "DDCCAA" }, fill: { color: "FFF8F0" }, colW: [2.0, 4.15], fontSize: 11 });

  // CARBUNCLE panel
  addBar(slide, 6.82, 1.02, 6.28, 0.5, C.accentDark);
  slide.addText("CARBUNCLE", { x: 6.92, y: 1.02, w: 6.1, h: 0.5, fontSize: 16, bold: true, color: C.white, valign: "middle", margin: 0 });
  slide.addShape(pres.shapes.RECTANGLE, { x: 6.82, y: 1.52, w: 6.28, h: 5.48, fill: { color: "FFF5EE" }, line: { color: C.accentDark, transparency: 30 } });

  const carbRows = [
    [{ text: "ASPECT", options: { bold: true, fill: { color: "3A1500" }, color: C.white } }, { text: "DETAIL", options: { bold: true, fill: { color: "3A1500" }, color: C.white } }],
    ["Definition", "≥2 confluent furuncles; multiple separate heads"],
    ["Organism", "S. aureus (MRSA); as per furuncle"],
    ["Depth", "Deep dermis + subcutaneous fat"],
    ["Discharge", "Multiple draining sinuses"],
    ["Sites", "Nape of neck most common; back; buttocks"],
    ["Systemic signs", "Fever, malaise, chills COMMON"],
    ["Scarring", "Significant scarring on healing"],
    ["I&D", "Mandatory; wide incision; break all loculations"],
    ["Antibiotics", "ALWAYS systemic; IV if severe/septic"],
    ["Prevention", "Same as furuncle + screen for DM"],
    ["Complication", "Septicaemia; osteomyelitis; endocarditis"],
  ];
  slide.addTable(carbRows, { x: 6.9, y: 1.6, w: 6.12, h: 5.35, border: { pt: 0.5, color: "DDCCAA" }, fill: { color: "FFF5EE" }, colW: [2.0, 4.12], fontSize: 11 });

  addBar(slide, 0, 7.1, 13.3, 0.4, C.accent);
  slide.addText("Andrews' Diseases of the Skin 12e  |  Fitzpatrick's Dermatology 9e  |  IDSA 2014", {
    x: 0.3, y: 7.1, w: 12.7, h: 0.4, fontSize: 10, color: C.white, align: "center", valign: "middle"
  });
}

// ─── WRITE ────────────────────────────────────────────────────────────────────
pres.writeFile({ fileName: "/home/daytona/workspace/cutaneous-infections-ppt/Furuncle_Carbuncle.pptx" })
  .then(() => console.log("✅ Furuncle & Carbuncle PPT created"))
  .catch(e => { console.error("❌ Error:", e); process.exit(1); });