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

// Fetch images as base64
function fetchImages(urls) {
  try {
    const result = execSync(
      `node /home/daytona/skills/shared/scripts/fetch_images.js ${urls.map(u => `"${u}"`).join(" ")}`,
      { timeout: 30000 }
    ).toString();
    return JSON.parse(result);
  } catch (e) {
    console.log("Image fetch failed:", e.message);
    return urls.map(u => ({ url: u, base64: null, error: e.message }));
  }
}

// Fetch key images
const imageUrls = [
  "https://www.shutterstock.com/image-vector/skin-burn-classification-infographic-medical-600nw-2400758957.jpg",
  "https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41572-020-0145-5/MediaObjects/41572_2020_145_Fig1_HTML.png",
  "https://www.researchgate.net/publication/325999173/figure/fig2/AS:641836062367745@1530037050923/Mechanisms-of-lightning-injury-a-Direct-b-Contact-c-Sidesplash-flash-d1-As.png",
];

console.log("Fetching images...");
const imgs = fetchImages(imageUrls);
console.log("Images fetched:", imgs.map(i => ({ url: i.url.substring(0, 60), ok: !i.error })));

const pres = new pptxgen();
pres.layout = "LAYOUT_16x9";
pres.author = "Forensic Medicine";
pres.title = "Thermal & Environmental Injuries - Forensic Medicine";

// ===================== COLOR PALETTE =====================
const C = {
  darkBg:    "1A1A2E",   // Deep navy
  midBg:     "16213E",   // Mid navy
  accent:    "E94560",   // Red accent
  accent2:   "0F3460",   // Deep blue
  gold:      "F5A623",   // Gold/amber
  teal:      "00B4D8",   // Teal highlight
  light:     "E0E0E0",   // Light grey text
  white:     "FFFFFF",
  green:     "2ECC71",   // Green
  orange:    "E67E22",   // Orange
  purple:    "9B59B6",   // Purple
  headerBar: "E94560",   // Section header bar
  tablHead:  "0F3460",   // Table header
  tableAlt:  "1A2A4A",   // Alternate row
  tableBody: "0D1B2A",   // Table body
};

// ===================== HELPER FUNCTIONS =====================
function addSectionTitle(slide, title, subtitle) {
  // Full dark background
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.darkBg } });
  // Diagonal accent
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 3.5, w: 10, h: 0.08, fill: { color: C.accent } });
  // Top accent line
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 10, h: 0.06, fill: { color: C.gold } });
  // Left accent bar
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 0.18, h: 5.625, fill: { color: C.accent } });
  // Main title
  slide.addText(title, {
    x: 0.4, y: 1.5, w: 9.2, h: 1.2,
    fontSize: 40, bold: true, color: C.white, align: "center",
    fontFace: "Calibri"
  });
  if (subtitle) {
    slide.addText(subtitle, {
      x: 0.4, y: 2.8, w: 9.2, h: 0.6,
      fontSize: 20, color: C.gold, align: "center",
      fontFace: "Calibri", italic: true
    });
  }
  // Bottom reference
  slide.addText("Ref: Reddy's FMT | Gautam Vishwas FMT", {
    x: 0.4, y: 5.1, w: 9.2, h: 0.35,
    fontSize: 10, color: "888888", align: "center", fontFace: "Calibri"
  });
}

function slideHeader(slide, title, topicColor) {
  const bg = topicColor || C.midBg;
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.darkBg } });
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 10, h: 0.75, fill: { color: bg } });
  slide.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0.75, w: 10, h: 0.04, fill: { color: C.gold } });
  slide.addText(title, {
    x: 0.3, y: 0.08, w: 9.4, h: 0.6,
    fontSize: 22, bold: true, color: C.white, align: "left",
    fontFace: "Calibri", margin: 0
  });
}

function addBullet(slide, items, x, y, w, h, opts = {}) {
  const textArr = items.map((item, i) => ({
    text: item.text || item,
    options: {
      bullet: item.bullet !== false,
      color: item.color || C.light,
      fontSize: item.size || opts.fontSize || 14,
      bold: item.bold || false,
      italic: item.italic || false,
      indentLevel: item.indent || 0,
      breakLine: i < items.length - 1
    }
  }));
  slide.addText(textArr, { x, y, w, h, fontFace: "Calibri", valign: "top" });
}

function addTable(slide, headers, rows, x, y, w, opts = {}) {
  const colW = opts.colW || Array(headers.length).fill(w / headers.length);
  const headerRow = headers.map(h => ({
    text: h,
    options: { bold: true, color: C.white, fill: { color: C.tablHead }, fontSize: opts.hFontSize || 12, align: "center" }
  }));
  const dataRows = rows.map((row, ri) =>
    row.map(cell => ({
      text: String(cell),
      options: {
        color: C.light,
        fill: { color: ri % 2 === 0 ? C.tableBody : C.tableAlt },
        fontSize: opts.fontSize || 11,
        align: "left"
      }
    }))
  );
  slide.addTable([headerRow, ...dataRows], {
    x, y, w,
    colW,
    border: { type: "solid", color: "2A3A5A", pt: 0.5 },
    rowH: opts.rowH || 0.32,
    fontFace: "Calibri"
  });
}

function addCardBox(slide, title, content, x, y, w, h, color) {
  slide.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x, y, w, h,
    fill: { color: color || C.accent2 },
    line: { color: C.gold, width: 1.5 },
    rectRadius: 0.1
  });
  if (title) {
    slide.addText(title, {
      x: x + 0.1, y: y + 0.05, w: w - 0.2, h: 0.3,
      fontSize: 12, bold: true, color: C.gold, fontFace: "Calibri", margin: 0
    });
  }
  if (content) {
    slide.addText(content, {
      x: x + 0.1, y: y + 0.38, w: w - 0.2, h: h - 0.45,
      fontSize: 10.5, color: C.light, fontFace: "Calibri", margin: 0, valign: "top"
    });
  }
}

// ========================= TITLE SLIDE =========================
let s = pres.addSlide();
s.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.darkBg } });
s.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 10, h: 0.06, fill: { color: C.accent } });
s.addShape(pres.shapes.RECTANGLE, { x: 0, y: 5.56, w: 10, h: 0.065, fill: { color: C.accent } });
s.addShape(pres.shapes.RECTANGLE, { x: 0, y: 2.5, w: 10, h: 0.04, fill: { color: C.gold } });
s.addText("THERMAL & ENVIRONMENTAL", {
  x: 0.3, y: 0.6, w: 9.4, h: 0.9, fontSize: 36, bold: true,
  color: C.white, align: "center", fontFace: "Calibri", charSpacing: 3
});
s.addText("INJURIES IN FORENSIC MEDICINE", {
  x: 0.3, y: 1.5, w: 9.4, h: 0.9, fontSize: 36, bold: true,
  color: C.accent, align: "center", fontFace: "Calibri", charSpacing: 3
});
s.addText("Burns • Scalds • Electrical Injuries • Lightning • Cold Injuries • Explosions", {
  x: 0.3, y: 2.65, w: 9.4, h: 0.5, fontSize: 14, color: C.gold,
  align: "center", fontFace: "Calibri", italic: true
});
s.addText([
  { text: "Reference: ", options: { bold: true, color: C.gold } },
  { text: "Reddy's The Essentials of Forensic Medicine & Toxicology (34th Ed.)", options: { color: C.light } },
  { text: " | ", options: { color: C.accent } },
  { text: "Gautam Vishwas - Forensic Medicine & Toxicology", options: { color: C.light } }
], {
  x: 0.3, y: 3.3, w: 9.4, h: 0.5, fontSize: 11, align: "center", fontFace: "Calibri"
});
s.addText("Topics Covered: Heat Injuries • Burns Classification • PM Appearances • Heat vs Extradural Hematoma\nAntemortem vs Postmortem Burns • Dry/Moist/Chemical Burns • Explosion • Cold • Electrical • Lightning", {
  x: 0.3, y: 4.0, w: 9.4, h: 0.7, fontSize: 11, color: "888888",
  align: "center", fontFace: "Calibri"
});

// =================================================================
// TOPIC 1: CLASSIFICATION OF HEAT INJURIES
// =================================================================

// Slide 1.1 - Section Title
s = pres.addSlide();
addSectionTitle(s, "CLASSIFICATION OF HEAT INJURIES", "Topic 1 | Forensic Medicine");

// Slide 1.2 - Overview & Classification
s = pres.addSlide();
slideHeader(s, "Classification of Heat Injuries - Overview", "E94560");
// Two column layout
s.addShape(pres.shapes.RECTANGLE, { x: 0.2, y: 0.9, w: 4.5, h: 4.5, fill: { color: "0D1B2A" }, line: { color: C.teal, width: 1 } });
s.addShape(pres.shapes.RECTANGLE, { x: 5.0, y: 0.9, w: 4.7, h: 4.5, fill: { color: "0D1B2A" }, line: { color: C.gold, width: 1 } });
s.addText("LOCAL HEAT INJURIES", { x: 0.3, y: 0.92, w: 4.3, h: 0.3, fontSize: 13, bold: true, color: C.teal, fontFace: "Calibri", margin: 0 });
addBullet(s, [
  { text: "BURNS - Caused by dry heat (flame, radiation, hot solid)", bold: true, color: C.gold },
  { text: "SCALDS - Caused by moist heat (steam, hot liquids)", bold: false },
  { text: "CHEMICAL BURNS - Acids/alkalis", bold: false },
  { text: "ELECTRICAL BURNS", bold: false },
  { text: "RADIATION BURNS - UV, X-rays, nuclear", bold: false },
  { text: "FRICTION BURNS (Abrasions)", bold: false },
], 0.3, 1.25, 4.3, 3.5, { fontSize: 12 });
s.addText("GENERAL (SYSTEMIC) HEAT INJURIES", { x: 5.1, y: 0.92, w: 4.5, h: 0.3, fontSize: 13, bold: true, color: C.gold, fontFace: "Calibri", margin: 0 });
addBullet(s, [
  { text: "HEAT CRAMPS", bold: true, color: C.teal, indent: 0 },
  { text: "Loss of salt; painful muscle cramps; treated with saline", indent: 1, size: 11 },
  { text: "HEAT EXHAUSTION (Heat Prostration)", bold: true, color: C.teal, indent: 0 },
  { text: "Loss of water & salt; collapse; pale clammy skin; temp normal/slight rise", indent: 1, size: 11 },
  { text: "HEAT STROKE (Sun Stroke)", bold: true, color: C.accent, indent: 0 },
  { text: "Failure of thermoregulation; temp >40°C; HOT DRY SKIN; most dangerous", indent: 1, size: 11 },
  { text: "HEAT HYPERPYREXIA", bold: true, color: C.accent, indent: 0 },
  { text: "Extremely high temp; brain damage; can be fatal", indent: 1, size: 11 },
], 5.1, 1.25, 4.5, 3.8, { fontSize: 12 });

// Slide 1.3 - Heat Stroke & Systemic Details
s = pres.addSlide();
slideHeader(s, "Heat Stroke - Forensic Significance (Reddy's FMT)", "E94560");
addTable(s,
  ["Feature", "Heat Cramps", "Heat Exhaustion", "Heat Stroke"],
  [
    ["Mechanism", "Salt loss", "Water + salt loss", "Thermoregulation failure"],
    ["Skin", "Normal", "Pale, clammy, moist", "HOT, DRY, red"],
    ["Temp", "Normal", "Normal / slight ↑", "> 40°C (hyperpyrexia)"],
    ["Sweating", "++", "++", "ABSENT (anhydrosis)"],
    ["Consciousness", "Normal", "Faintness/collapse", "Coma / convulsions"],
    ["Urine", "Normal", "Oliguria", "Oliguria / anuria"],
    ["Treatment", "Saline/oral fluids", "Rest + fluids + salt", "Immediate cooling"],
    ["Mortality", "Nil", "Rare", "High (30-80%)"],
  ],
  0.2, 0.85, 9.6,
  { colW: [2.0, 2.5, 2.5, 2.6], fontSize: 10.5, rowH: 0.35 }
);
s.addText("Forensic Note: Heat stroke - PM shows congestion of organs, petechiae, cerebral edema. May simulate natural death.", {
  x: 0.2, y: 4.85, w: 9.6, h: 0.4, fontSize: 11, color: C.accent,
  fontFace: "Calibri", bold: true
});

// Slide 1.4 - Classification by Agent
s = pres.addSlide();
slideHeader(s, "Classification of Heat Injuries by Agent & Mechanism", "E94560");
addCardBox(s, "DRY HEAT", "Flame, hot metal, radiation\nCauses BURNS\nEpidermis destroyed; coagulation necrosis", 0.2, 0.85, 3.0, 1.6, "1A2A4A");
addCardBox(s, "MOIST HEAT", "Steam, boiling water, hot liquids\nCauses SCALDS\nBlisters more common; deeper penetration possible", 3.4, 0.85, 3.0, 1.6, "1A2A4A");
addCardBox(s, "CHEMICAL", "Acids, alkalis, phenol, phosphorus\nAcid - coagulation necrosis (leathery)\nAlkali - liquefaction necrosis (deeper)", 6.6, 0.85, 3.2, 1.6, "1A2A4A");
addCardBox(s, "ELECTRICAL", "High/low voltage current\nEntry & exit wounds; internal burns\nJoule burns; metallization possible", 0.2, 2.65, 3.0, 1.6, "1A2A4A");
addCardBox(s, "RADIATION", "UV (sunburn), X-ray, nuclear, laser\nErythema → vesication → ulceration\nDepends on dose and type", 3.4, 2.65, 3.0, 1.6, "1A2A4A");
addCardBox(s, "FRICTION", "Road rash, abrasions from friction\nHeat generated at surface\nSurface skin loss with foreign material", 6.6, 2.65, 3.2, 1.6, "1A2A4A");
s.addText("Ref: Reddy Chapter - Burns & Scalds; Gautam Vishwas - Thermal Injuries", {
  x: 0.2, y: 5.2, w: 9.6, h: 0.25, fontSize: 9, color: "888888", fontFace: "Calibri", align: "right"
});

// =================================================================
// TOPIC 2: CLASSIFICATION OF BURNS
// =================================================================
s = pres.addSlide();
addSectionTitle(s, "CLASSIFICATION OF BURNS", "Topic 2 | Forensic Medicine");

// Slide 2.2 - Degrees Classification
s = pres.addSlide();
slideHeader(s, "Classification of Burns by Depth (Degree)", "0F3460");
addTable(s,
  ["Degree", "Depth", "Appearance", "Pain", "Healing"],
  [
    ["1st Degree\n(Superficial)", "Epidermis only", "Erythema, red, dry; NO blisters", "Painful (nerve ends intact)", "7-10 days; NO scar"],
    ["2nd Degree\n(Partial thickness)", "Epidermis + superficial dermis", "BLISTERS; red, moist, weeping surface", "Very painful", "2-3 weeks; minimal scar"],
    ["3rd Degree\n(Full thickness)", "Full dermis destroyed", "Pale white/charred; DRY; leathery", "PAINLESS (nerve ends destroyed)", "Needs grafting; scar"],
    ["4th Degree", "Subcutaneous fat/muscle/bone", "Charring; black; stiff; contracted", "Painless", "Amputation/major surgery"],
  ],
  0.15, 0.85, 9.7,
  { colW: [2.0, 2.2, 2.8, 2.0, 2.0], fontSize: 10.5, rowH: 0.55 }
);
s.addText("Rule of Nines (Wallace): Head/neck=9%, Each arm=9%, Chest=18%, Abdomen=18%, Each leg=18%, Perineum=1%  |  Used to estimate TBSA burned", {
  x: 0.15, y: 4.75, w: 9.7, h: 0.45, fontSize: 11, color: C.gold, fontFace: "Calibri", bold: true
});

// Slide 2.3 - Burn classification visual + Rule of Nines
s = pres.addSlide();
slideHeader(s, "Rule of Nines & Burn Area Estimation", "0F3460");
// Rule of nines diagram (boxes)
s.addShape(pres.shapes.RECTANGLE, { x: 0.2, y: 0.85, w: 9.6, h: 0.5, fill: { color: "0D1B2A" } });
s.addText("RULE OF NINES - WALLACE (1951)", { x: 0.2, y: 0.87, w: 9.6, h: 0.38, fontSize: 16, bold: true, color: C.gold, align: "center", fontFace: "Calibri" });

const bodyParts = [
  ["HEAD & NECK", "9%", C.teal],
  ["ANTERIOR TRUNK\n(Chest+Abdomen)", "18%", C.accent2],
  ["POSTERIOR TRUNK", "18%", C.accent2],
  ["EACH ARM", "9% each", "1A3A5A"],
  ["EACH LEG", "18% each", "1A3A5A"],
  ["PERINEUM", "1%", C.accent],
];
bodyParts.forEach((bp, i) => {
  const row = Math.floor(i / 3);
  const col = i % 3;
  const bx = 0.2 + col * 3.2;
  const by = 1.5 + row * 1.5;
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, { x: bx, y: by, w: 3.1, h: 1.3, fill: { color: bp[2] }, line: { color: C.gold, width: 1 }, rectRadius: 0.1 });
  s.addText(bp[0], { x: bx + 0.1, y: by + 0.1, w: 2.9, h: 0.6, fontSize: 13, bold: true, color: C.white, align: "center", fontFace: "Calibri" });
  s.addText(bp[1], { x: bx + 0.1, y: by + 0.65, w: 2.9, h: 0.5, fontSize: 20, bold: true, color: C.gold, align: "center", fontFace: "Calibri" });
});
s.addText("Total = 100% | Lund & Browder chart is more accurate for children (accounts for age-varying body proportions)", {
  x: 0.2, y: 4.9, w: 9.6, h: 0.35, fontSize: 11, color: C.light, align: "center", fontFace: "Calibri"
});

// Slide 2.4 - Classification by Cause + Severity
s = pres.addSlide();
slideHeader(s, "Burns - Classification by Cause & Severity", "0F3460");
s.addText("BY SEVERITY (ABA Classification)", { x: 0.2, y: 0.85, w: 9.6, h: 0.3, fontSize: 14, bold: true, color: C.gold, fontFace: "Calibri" });
addTable(s,
  ["Severity", "Criteria", "Management"],
  [
    ["MINOR", "< 15% TBSA (adult); < 10% TBSA (child); < 2% full thickness; no special areas", "Outpatient"],
    ["MODERATE", "15-25% TBSA (adult); 10-20% (child); 2-10% full thickness; no face/hands/feet", "Hospitalization"],
    ["MAJOR/CRITICAL", "> 25% TBSA (adult); > 20% (child); > 10% full thickness; burns to face/hands/genitalia; inhalation injury; electrical burns", "Burn unit"],
  ],
  0.2, 1.2, 9.6,
  { colW: [2.0, 4.8, 2.8], fontSize: 11, rowH: 0.55 }
);
s.addText("BY CAUSE", { x: 0.2, y: 3.0, w: 9.6, h: 0.3, fontSize: 14, bold: true, color: C.gold, fontFace: "Calibri" });
addBullet(s, [
  { text: "Thermal Burns: flame, contact (hot metal), flash, radiation", bold: false },
  { text: "Chemical Burns: acid/alkali/organic compounds", bold: false },
  { text: "Electrical Burns: entry/exit wounds; internal burns", bold: false },
  { text: "Radiation Burns: UV/X-ray/nuclear radiation", bold: false },
  { text: "Friction Burns: road rash; combination of heat + abrasion", bold: false },
], 0.2, 3.35, 9.6, 1.8, { fontSize: 13 });

// =================================================================
// TOPIC 3: PM APPEARANCES OF BURN
// =================================================================
s = pres.addSlide();
addSectionTitle(s, "POSTMORTEM APPEARANCES OF BURNS", "Topic 3 | Forensic Medicine");

// Slide 3.2 - External PM Changes
s = pres.addSlide();
slideHeader(s, "External Postmortem Appearances of Burns", "9B59B6");
s.addText("EXTERNAL CHANGES AT AUTOPSY", { x: 0.2, y: 0.85, w: 9.6, h: 0.28, fontSize: 14, bold: true, color: C.gold, fontFace: "Calibri" });
addBullet(s, [
  { text: "PUGILISTIC (BOXER) ATTITUDE - Most characteristic PM finding in burned bodies", bold: true, color: C.accent },
  { text: "Flexion of limbs due to heat coagulation and shortening of muscles & tendons (NOT vital reaction)", indent: 1, size: 11 },
  { text: "CHARRING & CARBONIZATION - Black, brittle, shrunken tissues; body may be unrecognizable", bold: true, color: C.gold },
  { text: "SKIN SPLITTING - Linear splits simulating incised wounds; edges regular, not undermined; no vital reaction", bold: true, color: C.teal },
  { text: "HEAT BLISTERS - May form postmortem; fluid is CLEAR/STRAW colored; NO inflammatory cells", bold: true, color: C.gold },
  { text: "EPIDERMIS PEELING - As a glove/stocking; helps in fingerprinting", bold: false },
  { text: "SINGEING of hair, eyebrows", bold: false },
  { text: "HEAT EDEMA - Swelling of burned areas (subcutaneous)", bold: false },
], 0.2, 1.2, 9.6, 3.8, { fontSize: 12.5 });
s.addText("KEY: Pugilistic attitude ≠ fighting posture - it is a purely mechanical response to heat coagulation of flexor muscles", {
  x: 0.2, y: 5.0, w: 9.6, h: 0.35, fontSize: 11, color: C.accent, fontFace: "Calibri", bold: true
});

// Slide 3.3 - Internal PM Changes
s = pres.addSlide();
slideHeader(s, "Internal Postmortem Appearances of Burns", "9B59B6");
addTable(s,
  ["Organ/System", "PM Finding", "Forensic Significance"],
  [
    ["SKULL", "HEAT HEMATOMA - extradural blood clot; honeycomb pattern; brown/dark red; no skull fracture needed", "Distinguish from true extradural hematoma"],
    ["BRAIN", "Cooked/shrunken; heat artifacts; cerebral edema if survived", "Cannot assess injury if severely burned"],
    ["LUNGS", "Soot inhalation; carboxyhemoglobin (COHb); inhalation injury; edema", "COHb > 10-20% = alive during fire"],
    ["BLOOD", "Cherry red (if COHb present); coagulation with heat", "COHb indicates antemortem burning"],
    ["STOMACH", "Curling's ulcer (stress ulcer) - in survivors", "Evidence of survival period"],
    ["MUSCLES", "Gray-brown; coagulated; contracted", "Explains pugilistic attitude"],
    ["EPIDURAL", "Heat hematoma - postmortem artifact", "Must not confuse with trauma"],
  ],
  0.15, 0.85, 9.7,
  { colW: [2.0, 4.2, 3.5], fontSize: 10, rowH: 0.45 }
);

// Slide 3.4 - PM Changes - Survival indicators
s = pres.addSlide();
slideHeader(s, "PM Evidence of Antemortem Burning (Alive During Fire)", "9B59B6");
addCardBox(s, "RESPIRATORY SYSTEM", "• Soot/carbon particles in trachea, bronchi, lungs\n• Singed nasal vibrissae\n• Inhalation injury; pulmonary edema\n• COHb in blood (VITAL REACTION)", 0.2, 0.85, 4.7, 2.1, "0D1B2A");
addCardBox(s, "CARBOXYHEMOGLOBIN (COHb)", "• CO binds Hb 200-250x more than O2\n• COHb > 10% = alive during fire\n• COHb > 50-60% = lethal\n• Blood appears cherry-red\n• SPECTROSCOPIC examination", 5.1, 0.85, 4.7, 2.1, "0D1B2A");
addCardBox(s, "VITAL REACTIONS", "• Inflammatory cells at burn margins\n• Hyperemia and edema in surrounding tissue\n• Blister fluid with protein/leucocytes\n• Carbon particles BELOW vocal cords\n• Curling's ulcer (survival > 24 hrs)", 0.2, 3.1, 4.7, 2.0, "0D1B2A");
addCardBox(s, "BLOOD CHANGES", "• Hemoconcentration\n• Elevated plasma proteins\n• Elevated BUN, creatinine (renal failure)\n• Metabolic acidosis\n• COHb (spectroscopy/CO-oximetry)", 5.1, 3.1, 4.7, 2.0, "0D1B2A");
s.addText("If only external burns present without soot inhalation or COHb → body placed in fire AFTER death (postmortem burning)", {
  x: 0.2, y: 5.2, w: 9.6, h: 0.2, fontSize: 9, color: C.accent, fontFace: "Calibri", bold: true
});

// =================================================================
// TOPIC 4: HEAT HEMATOMA vs EXTRADURAL HEMATOMA
// =================================================================
s = pres.addSlide();
addSectionTitle(s, "HEAT HEMATOMA vs EXTRADURAL HEMATOMA", "Topic 4 | Forensic Medicine");

// Slide 4.2 - Comparison Table
s = pres.addSlide();
slideHeader(s, "Heat Hematoma vs Extradural Hematoma - Key Differences", "F5A623");
addTable(s,
  ["Feature", "HEAT HEMATOMA", "EXTRADURAL HEMATOMA"],
  [
    ["Origin", "POSTMORTEM artifact; due to heat", "ANTEMORTEM; due to trauma (head injury)"],
    ["Cause", "Heat causes blood to boil, froth and collect in extradural space", "Rupture of middle meningeal artery (usually)"],
    ["Color", "DARK BROWN to chocolate; frothy/honeycomb", "DARK RED; gelatinous; no honeycomb"],
    ["Consistency", "SPONGY, honeycomb/porous (gas bubbles from boiling)", "CLOTTED; firm; jelly-like"],
    ["Skull Fracture", "Usually ABSENT; NO skull fracture", "Usually PRESENT (95%); fracture of temporal bone"],
    ["Location", "Frontoparietal; widespread", "Temporal (pterion region); localized"],
    ["Dura Mater", "NOT stripped from bone (attached)", "Dura STRIPPED from inner table"],
    ["Volume", "Small; < 25 ml typically", "Can be large (30-100 ml)"],
    ["Brain", "No compression pattern; boiled/cooked", "COMPRESSION of brain; herniation"],
    ["Clinical Hx", "Body found in fire/burned environment", "History of head trauma; lucid interval"],
    ["Forensic Signif.", "Postmortem fire artifact; NOT evidence of trauma", "Evidence of antemortem injury; manner of death"],
  ],
  0.15, 0.82, 9.7,
  { colW: [2.0, 3.8, 3.9], fontSize: 10, rowH: 0.32 }
);

// Slide 4.3 - Memory Aid + Notes
s = pres.addSlide();
slideHeader(s, "Heat Hematoma - Mechanism & Memory Aid", "F5A623");
addCardBox(s, "MECHANISM OF HEAT HEMATOMA", "1. Intense heat → boiling of blood in diploe (skull marrow)\n2. Boiled blood + gas → expand → collect in epidural space\n3. Dura remains attached to bone\n4. Gives characteristic HONEYCOMB (spongy, porous) appearance\n5. Dark brown color (hematin from hemoglobin breakdown)", 0.2, 0.85, 9.6, 2.0, "0D1B2A");
s.addShape(pres.shapes.RECTANGLE, { x: 0.2, y: 3.0, w: 4.6, h: 2.3, fill: { color: "0D1B2A" }, line: { color: C.teal, width: 1 } });
s.addText("HEAT HEMATOMA\n(Remember: H-H-H-H)", { x: 0.3, y: 3.05, w: 4.4, h: 0.4, fontSize: 14, bold: true, color: C.teal, fontFace: "Calibri" });
addBullet(s, [
  { text: "HEAT-induced (Postmortem)", bold: true, color: C.gold },
  { text: "HONEYCOMB appearance", bold: true, color: C.gold },
  { text: "HELMET (frontovertex region)", bold: true, color: C.gold },
  { text: "Dura is HELD (not stripped)", bold: true, color: C.gold },
], 0.3, 3.5, 4.4, 1.7, { fontSize: 13 });
s.addShape(pres.shapes.RECTANGLE, { x: 5.1, y: 3.0, w: 4.7, h: 2.3, fill: { color: "0D1B2A" }, line: { color: C.accent, width: 1 } });
s.addText("EXTRADURAL HEMATOMA", { x: 5.2, y: 3.05, w: 4.5, h: 0.4, fontSize: 14, bold: true, color: C.accent, fontFace: "Calibri" });
addBullet(s, [
  { text: "TRAUMA-induced (Antemortem)", bold: true, color: C.gold },
  { text: "TEMPORAL region (pterion)", bold: true, color: C.gold },
  { text: "Middle Meningeal Artery tear", bold: true, color: C.gold },
  { text: "Dura is DETACHED (stripped)", bold: true, color: C.gold },
], 5.2, 3.5, 4.5, 1.7, { fontSize: 13 });

// =================================================================
// TOPIC 5: ANTEMORTEM vs POSTMORTEM BURNS
// =================================================================
s = pres.addSlide();
addSectionTitle(s, "ANTEMORTEM vs POSTMORTEM BURNS", "Topic 5 | Forensic Medicine");

// Slide 5.2 - Comparison Table
s = pres.addSlide();
slideHeader(s, "Antemortem vs Postmortem Burns - Comparison", "2ECC71");
addTable(s,
  ["Feature", "ANTEMORTEM BURNS", "POSTMORTEM BURNS"],
  [
    ["Definition", "Burns sustained when ALIVE", "Burns after death"],
    ["Vital Reaction", "PRESENT: hyperemia, edema, inflammatory cells at margins", "ABSENT: no inflammatory response"],
    ["Blister Fluid", "Contains PROTEIN (albumin), WBCs, fibrin", "Clear fluid or absent; NO protein/WBCs"],
    ["Blister Base", "RED, inflamed, hyperemic", "PALE; no hyperemia"],
    ["COHb in blood", "PRESENT > 10% (inhaled CO)", "ABSENT (< 5%)"],
    ["Soot in airways", "PRESENT: soot below glottis, in bronchi/lungs", "ABSENT: soot only above glottis (larynx)"],
    ["Skin margins", "Inflamed/hyperemic red halo around burns", "No red halo; dry, parchment-like edges"],
    ["Histology", "Vascular congestion, PMN infiltration, edema", "No cellular reaction"],
    ["Blood color", "CHERRY RED (COHb)", "Normal; no COHb"],
    ["Pain response", "Evidence of struggle, posture changes", "Pugilistic attitude only (postmortem)"],
    ["Curling's ulcer", "Can occur (>24h survival)", "Absent"],
    ["Forensic Imp.", "HOMICIDE: fire to conceal crime; accident/suicide", "Fire set after murder to destroy evidence"],
  ],
  0.15, 0.82, 9.7,
  { colW: [2.2, 3.75, 3.75], fontSize: 9.5, rowH: 0.31 }
);

// Slide 5.3 - Key Differentiating Tests
s = pres.addSlide();
slideHeader(s, "Key Tests to Distinguish Antemortem from Postmortem Burns", "2ECC71");
addCardBox(s, "1. CARBOXYHEMOGLOBIN (COHb) - MOST IMPORTANT", "• COHb > 10%: person was alive & breathing during fire\n• Levels > 50-60% = fatal CO poisoning\n• Tested by: CO-oximetry or Spectroscopy\n• Absent in PM burns (no breathing)", 0.2, 0.85, 9.6, 1.3, "0D1B2A");
addCardBox(s, "2. HISTOLOGICAL EXAMINATION", "• Antemortem: PMN infiltration, vascular congestion, edema, fibrin\n• Postmortem: No cellular reaction; acellular; no vascular response", 0.2, 2.3, 4.7, 1.3, "0D1B2A");
addCardBox(s, "3. BLISTER FLUID ANALYSIS", "• Antemortem: Protein > 2g/100ml; albumin/globulin; WBCs present\n• Postmortem: No protein; clear fluid; no cells", 5.1, 2.3, 4.7, 1.3, "0D1B2A");
addCardBox(s, "4. SOOT INHALATION", "• Antemortem: Carbon particles below vocal cords (bronchi/alveoli)\n• Postmortem: Carbon only in mouth/nose/above larynx (passive deposition)", 0.2, 3.75, 4.7, 1.3, "0D1B2A");
addCardBox(s, "5. MACROSCOPIC VITAL REACTION", "• Red/pink erythematous halo around burns = antemortem\n• No such halo = postmortem\n• Heat blisters PM: pale, acellular, no congested base", 5.1, 3.75, 4.7, 1.3, "0D1B2A");
s.addText("Ref: Reddy - Chapter Burns & Scalds; Gautam Vishwas - Antemortem vs PM Burns", {
  x: 0.2, y: 5.2, w: 9.6, h: 0.2, fontSize: 9, color: "888888", fontFace: "Calibri", align: "right"
});

// =================================================================
// TOPIC 6: DRY HEAT vs MOIST HEAT (SCALD) vs CHEMICAL BURN
// =================================================================
s = pres.addSlide();
addSectionTitle(s, "DRY HEAT vs MOIST HEAT (SCALD) vs CHEMICAL BURN", "Topic 6 | Forensic Medicine");

// Slide 6.2 - Big comparison table
s = pres.addSlide();
slideHeader(s, "Dry Heat vs Scald (Moist Heat) vs Chemical Burns", "00B4D8");
addTable(s,
  ["Feature", "DRY HEAT (Burns)", "MOIST HEAT (Scalds)", "CHEMICAL BURNS"],
  [
    ["Agent", "Flame, hot solid, radiant heat", "Boiling water, steam, hot liquid", "Acids, alkalis, phenol, phosphorus"],
    ["Area Affected", "Localized; often clothing pattern", "Irregular; trickling/splash pattern", "Area of contact; may be widespread"],
    ["Blisters", "In 2nd degree; may be absent in 3rd°", "COMMON; large fluid-filled blisters", "Rare (acids); may occur (alkalis)"],
    ["Depth", "Often superficial to deep", "Usually superficial-partial thickness", "Acids: coagulation (limited)\nAlkalis: DEEPER (liquefaction necrosis)"],
    ["Eschar", "Hard, leathery eschar", "Soft, moist, shredded skin", "Acid: hard, parchment-like eschar\nAlkali: soft, slippery, soapy"],
    ["Charring", "YES (3rd/4th degree)", "NO charring", "Possible with conc. acid; NO with alkali"],
    ["Hair/Clothing", "Singed/burned", "Wet; clothing may retain heat", "Dissolved/discolored by agent"],
    ["Pain", "Varies by degree", "Severe pain initially", "Burning pain; may be delayed"],
    ["Smell", "Burning flesh/hair odor", "Scalded/cooked smell", "Characteristic chemical odor"],
    ["Pattern", "Contact pattern; splash", "Splash/trickling/poured pattern", "Contact/splash/deliberate pour"],
    ["Healing", "Variable; scar in deep burns", "Less scarring than dry burns", "Deep necrosis; poor healing; keloids"],
    ["Forensic Note", "Often accidental/suicidal/homicidal", "Child abuse (dunking); scalding assault", "Assault (vitriolage); suicide (rare)"],
  ],
  0.15, 0.82, 9.7,
  { colW: [2.0, 2.5, 2.5, 2.7], fontSize: 9.5, rowH: 0.32 }
);

// Slide 6.3 - Chemical Burns Detail
s = pres.addSlide();
slideHeader(s, "Chemical Burns - Acids vs Alkalis (Forensic Details)", "00B4D8");
s.addShape(pres.shapes.RECTANGLE, { x: 0.2, y: 0.85, w: 4.6, h: 4.5, fill: { color: "0D1B2A" }, line: { color: C.accent, width: 1.5 } });
s.addShape(pres.shapes.RECTANGLE, { x: 5.1, y: 0.85, w: 4.7, h: 4.5, fill: { color: "0D1B2A" }, line: { color: C.teal, width: 1.5 } });
s.addText("ACID BURNS", { x: 0.3, y: 0.88, w: 4.4, h: 0.3, fontSize: 16, bold: true, color: C.accent, fontFace: "Calibri" });
addBullet(s, [
  { text: "Mechanism: COAGULATION NECROSIS", bold: true, color: C.gold },
  { text: "Protein coagulation limits deeper penetration (self-limiting)", indent: 1, size: 11 },
  { text: "Eschar: HARD, leathery, parchment-like, brown/black", bold: false },
  { text: "Common agents: H2SO4, HCl, HNO3, Carbolic acid (phenol)", bold: false },
  { text: "Sulfuric acid: Black burns", bold: false },
  { text: "Nitric acid: Yellow burns (xanthoproteic reaction)", bold: false },
  { text: "Hydrochloric acid: White-grey discoloration", bold: false },
  { text: "Forensic: VITRIOLAGE - acid attacks (face/eyes); homicidal", bold: true, color: C.accent },
], 0.3, 1.25, 4.4, 4.0, { fontSize: 11.5 });
s.addText("ALKALI BURNS", { x: 5.2, y: 0.88, w: 4.5, h: 0.3, fontSize: 16, bold: true, color: C.teal, fontFace: "Calibri" });
addBullet(s, [
  { text: "Mechanism: LIQUEFACTION NECROSIS", bold: true, color: C.gold },
  { text: "Saponification of fat → deeper, more severe injury (NOT self-limiting)", indent: 1, size: 11 },
  { text: "Eschar: SOFT, slippery, soapy-feel, grey/white", bold: false },
  { text: "Common agents: NaOH (caustic soda), KOH, lime, ammonia", bold: false },
  { text: "Burns appear deceptively superficial initially", bold: false },
  { text: "Worse than acid - continues to penetrate deeper", bold: true, color: C.accent },
  { text: "Phosphorus burns: glow in dark; continue burning; garlic odor", bold: false },
  { text: "Forensic: Industrial accidents; assault; child abuse", bold: true, color: C.teal },
], 5.2, 1.25, 4.5, 4.0, { fontSize: 11.5 });

// Slide 6.4 - Scald (Moist Heat) Forensic Patterns
s = pres.addSlide();
slideHeader(s, "Scalds (Moist Heat) - Forensic Patterns & Child Abuse", "00B4D8");
addCardBox(s, "ACCIDENT PATTERN", "• Splash/spill burns - irregular, asymmetric\n• Upper body: neck, chest, arms\n• Trickling streams of liquid visible\n• Clothing protects underlying areas", 0.2, 0.85, 3.0, 2.0, "0D1B2A");
addCardBox(s, "CHILD ABUSE PATTERN (DUNKING)", "• Stocking/glove distribution on limbs\n• Symmetric; clear tide marks\n• Buttocks/perineum burns (forced dunking)\n• No splash marks\n• Sharp line of demarcation", 3.4, 0.85, 3.0, 2.0, "0D1B2A");
addCardBox(s, "HOMICIDAL SCALDING", "• Bound victim burns (circular/line patterns)\n• Burns in unusual sites for accident\n• Multiple sessions of burns\n• Inconsistent history", 6.6, 0.85, 3.2, 2.0, "0D1B2A");
s.addText("CHARACTERISTICS OF SCALD vs BURN", { x: 0.2, y: 3.0, w: 9.6, h: 0.3, fontSize: 14, bold: true, color: C.gold, fontFace: "Calibri" });
addTable(s,
  ["Feature", "Burns (Dry Heat)", "Scalds (Moist Heat)"],
  [
    ["Singed hair", "YES", "NO"],
    ["Charring", "YES (3rd°)", "NEVER"],
    ["Blisters", "Present", "Prominent & larger"],
    ["Pattern", "Contact/flame shape", "Splash/trickling/symmetric"],
    ["Steam scalds", "N/A", "Full thickness, widespread"],
  ],
  0.2, 3.35, 9.6,
  { colW: [3.0, 3.3, 3.3], fontSize: 12, rowH: 0.32 }
);

// =================================================================
// TOPIC 7: EXPLOSION INJURIES
// =================================================================
s = pres.addSlide();
addSectionTitle(s, "EXPLOSION INJURIES", "Topic 7 | Forensic Medicine");

// Slide 7.2 - Classification
s = pres.addSlide();
slideHeader(s, "Classification of Explosion Injuries", "E67E22");
addTable(s,
  ["Category", "Mechanism", "Injuries", "Examples"],
  [
    ["PRIMARY\n(Blast Injuries)", "Pressure wave / blast overpressure directly acting on body", "Tympanic membrane rupture (hallmark); pulmonary blast; hollow organ rupture; blast lung; bowel perforation", "Bomb blasts; IED; mine explosions"],
    ["SECONDARY\n(Missile/Fragment)", "Fragments, shrapnel, debris propelled by explosion", "Penetrating wounds; multiple small wounds; foreign body embedding; contusions", "Shell fragments; glass; debris"],
    ["TERTIARY\n(Displacement)", "Body thrown by blast wind; impacts solid objects", "Blunt trauma; fractures; crush injuries; traumatic amputation; head injury", "Thrown against walls/vehicles"],
    ["QUATERNARY\n(Miscellaneous)", "Burns, inhalation, toxic gases, crush (building collapse)", "Burns (flame/flash); smoke/CO inhalation; toxic fumes; traumatic asphyxia", "Structural collapse; gas fires"],
    ["QUINARY\n(5th)", "Bacteria/radiation/chemical contamination (dirty bombs)", "Sepsis; radiation sickness; chemical poisoning", "Dirty bombs; chemical/bio agents"],
  ],
  0.15, 0.85, 9.7,
  { colW: [1.9, 2.3, 3.2, 2.3], fontSize: 9.5, rowH: 0.58 }
);

// Slide 7.3 - Blast Lung + PM Features
s = pres.addSlide();
slideHeader(s, "Blast Lung & PM Findings in Explosion Deaths", "E67E22");
addCardBox(s, "BLAST WAVE PHYSICS", "Mach stem effect - positive pressure wave followed by negative wave\nTransmitted at speed of sound\nLiquid-air interfaces most vulnerable: LUNGS, GUT, EAR\nOpen space vs confined space injuries differ significantly", 0.2, 0.85, 4.7, 1.7, "0D1B2A");
addCardBox(s, "BLAST LUNG (PRIMARY)", "• Bilateral pulmonary contusions\n• Petechiae; hemorrhage; edema\n• Air embolism - cerebral/coronary → sudden death\n• No external marks (deceptive)\n• MOST COMMON CAUSE OF BLAST DEATH", 5.1, 0.85, 4.7, 1.7, "0D1B2A");
s.addText("PM EXAMINATION FINDINGS", { x: 0.2, y: 2.7, w: 9.6, h: 0.3, fontSize: 14, bold: true, color: C.gold, fontFace: "Calibri" });
addTable(s,
  ["Finding", "Description"],
  [
    ["Tympanic Membrane", "Rupture (50% with primary blast); hemorrhage in external canal; ossicular chain disruption"],
    ["Lungs", "Diffuse hemorrhage; 'shock lung'; contusions; pneumothorax; hemothorax"],
    ["Hollow Organs", "Perforation of bowel (gas-containing loops most vulnerable); stomach; sinuses"],
    ["Brain", "Cerebral air embolism; concussion; contusion; DAI"],
    ["Eyes", "Retinal detachment; globe rupture; corneal/lens injury"],
    ["External", "Multiple puncture wounds (secondary); burns (quaternary); traumatic amputation"],
  ],
  0.2, 3.05, 9.6,
  { colW: [2.5, 7.1], fontSize: 10.5, rowH: 0.36 }
);

// Slide 7.4 - Types of Explosion & Forensic Notes
s = pres.addSlide();
slideHeader(s, "Types of Explosive Agents & Forensic Significance", "E67E22");
addTable(s,
  ["Type", "Agent", "Forensic Characteristics"],
  [
    ["HIGH EXPLOSIVES", "TNT, RDX, Semtex, C4, PETN", "High velocity detonation; blast wave; dismemberment; fragmentation; residue analysis"],
    ["LOW EXPLOSIVES\n(Propellants)", "Gunpowder, smokeless powder", "Deflagration; burning; no true blast wave; projectile propulsion; GSR"],
    ["IMPROVISED (IED)", "ANFO, TATP, HMTD, peroxide-based", "Variable composition; wide fragment scatter; chemical residues; often triggered remotely"],
    ["GAS EXPLOSIONS", "LPG, natural gas, methane", "Burns predominate; blast less; CO inhalation; building collapse; secondary fires"],
    ["NUCLEAR", "Fission/fusion devices", "Blast + burns + radiation; flash burns; radiation sickness; EMP; thermal pulse"],
  ],
  0.15, 0.85, 9.7,
  { colW: [2.2, 2.3, 5.2], fontSize: 10.5, rowH: 0.48 }
);
s.addText("Key PM: Collect fragments for analysis; document pattern of injuries; residue swabs; document organ damage pattern; assist identification (dental/DNA)", {
  x: 0.15, y: 4.82, w: 9.7, h: 0.4, fontSize: 11, color: C.gold, fontFace: "Calibri", bold: true
});

// =================================================================
// TOPIC 8: COLD INJURIES
// =================================================================
s = pres.addSlide();
addSectionTitle(s, "COLD INJURIES", "Topic 8 | Forensic Medicine");

// Slide 8.2 - Classification
s = pres.addSlide();
slideHeader(s, "Classification of Cold Injuries", "0099CC");
s.addShape(pres.shapes.RECTANGLE, { x: 0.2, y: 0.85, w: 4.6, h: 4.5, fill: { color: "0D1B2A" }, line: { color: C.teal, width: 1.5 } });
s.addShape(pres.shapes.RECTANGLE, { x: 5.1, y: 0.85, w: 4.7, h: 4.5, fill: { color: "0D1B2A" }, line: { color: C.gold, width: 1.5 } });
s.addText("LOCAL COLD INJURIES", { x: 0.3, y: 0.88, w: 4.4, h: 0.3, fontSize: 15, bold: true, color: C.teal, fontFace: "Calibri" });
addBullet(s, [
  { text: "1. FROSTBITE", bold: true, color: C.gold },
  { text: "Freezing of tissue; extremities; nose/ears", indent: 1, size: 11 },
  { text: "Grades: Frostnip → 1st→2nd→3rd→4th degree", indent: 1, size: 11 },
  { text: "2. CHILBLAIN (Pernio)", bold: true, color: C.gold },
  { text: "Mild non-freezing; repeated cold exposure; erythema/itching", indent: 1, size: 11 },
  { text: "3. TRENCH FOOT (Immersion Foot)", bold: true, color: C.gold },
  { text: "Prolonged wet cold; not freezing; neuropathy + vascular", indent: 1, size: 11 },
  { text: "4. IMMERSION FOOT", bold: true, color: C.gold },
  { text: "Cold water exposure; sailors/soldiers; similar to trench foot", indent: 1, size: 11 },
], 0.3, 1.25, 4.4, 4.0, { fontSize: 12 });
s.addText("GENERAL COLD INJURIES", { x: 5.2, y: 0.88, w: 4.5, h: 0.3, fontSize: 15, bold: true, color: C.gold, fontFace: "Calibri" });
addBullet(s, [
  { text: "HYPOTHERMIA - Core temp < 35°C", bold: true, color: C.accent },
  { text: "Mild: 32-35°C - shivering, tachycardia", indent: 1, size: 11 },
  { text: "Moderate: 28-32°C - muscle rigidity, confusion, bradycardia, J-wave", indent: 1, size: 11 },
  { text: "Severe: < 28°C - cardiac arrhythmias, coma", indent: 1, size: 11 },
  { text: "Profound: < 20°C - asystole; death", indent: 1, size: 11 },
  { text: "PARADOXICAL UNDRESSING", bold: true, color: C.accent },
  { text: "Victim removes clothing due to burning sensation (terminal vasodilation)", indent: 1, size: 11 },
  { text: "TERMINAL BURROWING", bold: true, color: C.accent },
  { text: "Person hides in enclosed space just before death", indent: 1, size: 11 },
], 5.2, 1.25, 4.5, 4.0, { fontSize: 12 });

// Slide 8.3 - Frostbite Grading Table
s = pres.addSlide();
slideHeader(s, "Frostbite - Grading & PM Appearances in Cold Death", "0099CC");
s.addText("FROSTBITE - GRADING", { x: 0.2, y: 0.85, w: 9.6, h: 0.28, fontSize: 14, bold: true, color: C.gold, fontFace: "Calibri" });
addTable(s,
  ["Grade", "Depth", "Appearance", "Features", "Prognosis"],
  [
    ["1st (Frostnip)", "Superficial skin", "Erythema, numbness", "No blisters; reversible", "Full recovery"],
    ["2nd (Superficial)", "Epidermis + upper dermis", "Blisters (clear fluid)", "Vesicles within 24h; painful on thawing", "Recovery in weeks"],
    ["3rd (Deep)", "Dermis + subcutaneous", "Hemorrhagic blisters", "Dark red/purple; non-blanching; gangrenous", "Tissue loss possible"],
    ["4th (Complete)", "Full tissue freeze", "Black; mummified; dry gangrene", "Bone/joint involvement; amputation", "Amputation often needed"],
  ],
  0.2, 1.18, 9.6,
  { colW: [1.8, 2.0, 2.2, 2.5, 1.5], fontSize: 10.5, rowH: 0.45 }
);
s.addText("PM APPEARANCES IN COLD DEATH", { x: 0.2, y: 3.35, w: 9.6, h: 0.28, fontSize: 14, bold: true, color: C.gold, fontFace: "Calibri" });
addBullet(s, [
  { text: "Body found in flexed 'fetal' posture (protection from cold)", bold: false },
  { text: "PARADOXICAL UNDRESSING: clothes removed/scattered nearby (65% of hypothermia deaths)", bold: true, color: C.accent },
  { text: "WISCHNEWSKI SPOTS (WISCHNEWSKY): brownish-red hemorrhagic erosions in gastric mucosa - PATHOGNOMONIC of cold death", bold: true, color: C.teal },
  { text: "Bright pink/cherry red lividity (oxyhemoglobin; no CO needed)", bold: false },
  { text: "Frost/ice crystals on body surface; frozen clothing", bold: false },
  { text: "Pancreatitis, hepatic necrosis (internal PM findings)", bold: false },
], 0.2, 3.7, 9.6, 1.5, { fontSize: 12 });

// Slide 8.4 - Hypothermia ECG + Forensic
s = pres.addSlide();
slideHeader(s, "Hypothermia - Signs, ECG Changes & Forensic Importance", "0099CC");
addCardBox(s, "CLINICAL SIGNS BY TEMP", "35-32°C: Shivering, tachycardia, confusion, skin pallor\n32-28°C: Shivering STOPS, muscle rigidity, bradycardia, hypotension, drowsiness\n28-20°C: Coma, fixed pupils, absent reflexes, arrhythmias\n< 20°C: Asystole, death", 0.2, 0.85, 4.7, 2.0, "0D1B2A");
addCardBox(s, "ECG CHANGES (Osborn J-Wave)", "J wave (Osborn wave) = notch at QRS-ST junction\nAppears at core temp < 32°C\nPathognomonic of hypothermia\nOther: Prolonged PR/QRS/QT; AF; VF at < 28°C\nBradycardia → heart block → asystole", 5.1, 0.85, 4.7, 2.0, "0D1B2A");
addCardBox(s, "FORENSIC SIGNIFICANCE", "• Natural causes vs exposure/neglect vs homicide\n• Elder/infant neglect; vagrant population\n• Wischnewski spots: specific for cold death\n• Bright pink lividity may mislead (not CO poisoning)\n• Paradoxical undressing may suggest sexual assault → rule out\n• Blood: pink color; no COHb\n• Require toxicology: alcohol (impairs thermoregulation)", 0.2, 3.05, 4.7, 2.1, "0D1B2A");
addCardBox(s, "COLD INJURY INVESTIGATIONS", "• Core temperature (rectal/esophageal)\n• Blood alcohol (alcohol = common co-factor)\n• COHb (rule out CO)\n• Toxicology screen\n• Gastric examination for Wischnewski spots\n• Histology: adipose necrosis; hemorrhages\n• External exam: paradoxical undressing; frostbite", 5.1, 3.05, 4.7, 2.1, "0D1B2A");

// =================================================================
// TOPIC 9: ELECTRICAL INJURIES
// =================================================================
s = pres.addSlide();
addSectionTitle(s, "ELECTRICAL INJURIES", "Topic 9 | Forensic Medicine");

// Slide 9.2 - Classification & Factors
s = pres.addSlide();
slideHeader(s, "Electrical Injuries - Classification & Determining Factors", "9B59B6");
s.addText("FACTORS DETERMINING SEVERITY", { x: 0.2, y: 0.85, w: 9.6, h: 0.28, fontSize: 14, bold: true, color: C.gold, fontFace: "Calibri" });
addTable(s,
  ["Factor", "Effect", "Notes"],
  [
    ["VOLTAGE", "Higher V → more severe injury", "Low (<1000V): domestic; High (>1000V): industrial\nUltra-high: lightning (30 million V)"],
    ["CURRENT (Amperage)", "Current kills - NOT voltage", "1mA: tingling; 10-15mA: tetanic; 100mA: VF & death\nOhm's law: I = V/R"],
    ["RESISTANCE", "Low R → more current → more damage", "Wet skin: 1000Ω; Dry skin: 100,000-600,000Ω\nBone: highest R; Blood/nerve: lowest"],
    ["PATHWAY", "AC crosses chest (heart) more dangerous", "Hand-to-hand via chest: most dangerous\nHand-to-foot: VF; vertical: brain damage"],
    ["TYPE (AC vs DC)", "AC more dangerous at low voltage", "AC causes tetanic contraction (can't let go)\nDC causes single convulsion; used medically"],
    ["DURATION", "Longer → more damage", "Time × current = tissue damage"],
    ["FREQUENCY", "60 Hz (household) most dangerous", "High frequency (>100,000 Hz): less cardiac risk"],
  ],
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// Slide 9.3 - Entry/Exit Wounds & PM Findings
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slideHeader(s, "Electrical Entry/Exit Wounds & PM Findings", "9B59B6");
addTable(s,
  ["Feature", "ENTRY WOUND", "EXIT WOUND"],
  [
    ["Location", "Site of first contact (hand/head)", "Where current leaves (foot/ground)"],
    ["Shape", "ROUND or oval; cup/crater-shaped", "Irregular; burst outward"],
    ["Size", "Small; well-demarcated", "Larger; more destructive"],
    ["Edges", "Indurated, rolled; charred", "Everted, exploded outward"],
    ["Skin Changes", "Crocodile skin / puckered / metallic deposit", "Blown-out; fragmented"],
    ["Metallization", "May contain metal deposit from conductor", "Rare"],
  ],
  0.2, 0.85, 9.6,
  { colW: [2.0, 3.8, 3.8], fontSize: 11, rowH: 0.38 }
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s.addText("PM AUTOPSY FINDINGS - ELECTRICAL DEATHS", { x: 0.2, y: 3.35, w: 9.6, h: 0.28, fontSize: 14, bold: true, color: C.gold, fontFace: "Calibri" });
addBullet(s, [
  { text: "JOULE BURNS: at entry/exit and along path; may be minimal externally despite massive internal damage", bold: true, color: C.teal },
  { text: "Crocodile skin appearance at contact point", bold: false },
  { text: "Internal burns: deep muscle, vessels, nerves along current path; muscle charring", bold: false },
  { text: "Heart: VF → no clot in heart (sudden death); may show myocardial necrosis", bold: false },
  { text: "METALLIZATION: deposit of metal ions in skin at contact point (histology/XRF analysis)", bold: true, color: C.gold },
  { text: "May have MINIMAL external findings with massive internal burns (especially high voltage)", bold: false },
], 0.2, 3.7, 9.6, 1.6, { fontSize: 12 });

// Slide 9.4 - Mechanisms of Death
s = pres.addSlide();
slideHeader(s, "Mechanisms of Death in Electrical Injuries", "9B59B6");
addCardBox(s, "CARDIAC EFFECTS (Most Common Cause of Death)", "• VF (ventricular fibrillation): most common at 100mA; 60Hz AC\n• Asystole (direct DC; very high current)\n• Myocardial necrosis; conduction defects\n• Delayed cardiac arrest (up to 24h later)", 0.2, 0.85, 4.7, 2.0, "0D1B2A");
addCardBox(s, "RESPIRATORY EFFECTS", "• Respiratory arrest: tetanic contraction of chest muscles\n• Diaphragm paralysis\n• CNS paralysis (brainstem)\n• May outlast cardiac arrest → resuscitation window", 5.1, 0.85, 4.7, 2.0, "0D1B2A");
addCardBox(s, "NEUROLOGICAL EFFECTS", "• Immediate LOC; seizures\n• Peripheral nerve damage; neuropathy\n• Delayed: parkinsonism; cataracts; psychiatric\n• Spinal cord damage (transverse myelitis)\n• Keraunoparalysis (lightning-specific)", 0.2, 3.05, 4.7, 2.0, "0D1B2A");
addCardBox(s, "FORENSIC CONSIDERATIONS", "• Manner: Accident (most); Homicide (rare); Suicide\n• Scene: look for conductor, damp environment\n• Minimum current: 100-200mA causes VF → death\n• Domestic 220V can kill (if wet skin)\n• Death may occur without any external burns\n• Electrothermal metallization → forensic proof", 5.1, 3.05, 4.7, 2.0, "0D1B2A");
s.addText("Ref: Reddy Chapter 17 - Electrical & Lightning Injuries | Gautam Vishwas FMT", {
  x: 0.2, y: 5.2, w: 9.6, h: 0.2, fontSize: 9, color: "888888", fontFace: "Calibri", align: "right"
});

// =================================================================
// TOPIC 10: LIGHTNING INJURIES
// =================================================================
s = pres.addSlide();
addSectionTitle(s, "LIGHTNING INJURIES", "Topic 10 | Forensic Medicine");

// Slide 10.2 - Mechanisms
s = pres.addSlide();
slideHeader(s, "Lightning Injuries - Mechanisms & Types", "F5A623");
addTable(s,
  ["Mechanism", "Description", "Injuries"],
  [
    ["DIRECT STRIKE", "Lightning strikes person directly", "Most severe; full current through body; cardiac arrest; severe burns"],
    ["CONTACT INJURY", "Person in contact with struck object (tree/pole)", "Current passes to person via object; intermediate severity"],
    ["SIDE FLASH (Splash)", "Current jumps from struck object to nearby person", "Multiple victims possible; less severe than direct"],
    ["GROUND CURRENT\n(Step Voltage)", "Current spreads radially from lightning strike point on ground", "Enters one foot/leg; exits other; affects multiple people; tetany"],
    ["UPWARD STREAMER", "Person develops upward leader discharge", "Burns to top of head; hair singing; skin marks"],
    ["BLAST WAVE", "Explosive thunder/shock wave", "Barotrauma: TM rupture; concussion; blast lung; blunt injury"],
  ],
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);
s.addText("Lightning = 30 million volts; 100,000-300,000 amperes; 1/10,000 second duration → massive but brief current", {
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});

// Slide 10.3 - PM Appearances
s = pres.addSlide();
slideHeader(s, "PM Appearances of Lightning Injury (Forensic Pathology)", "F5A623");
addTable(s,
  ["Feature", "Finding", "Significance"],
  [
    ["LICHTENBERG FIGURES\n(Arborescent marks)", "Fern-like/tree-branch pattern of reddish-brown skin marks; fade within 24h", "PATHOGNOMONIC of lightning; keraunoparalytic marks; due to electron bombardment"],
    ["MAGNETIZATION", "Metal objects (belt buckles, rings, coins) may be magnetized/welded", "Confirms lightning (not electrical injury)"],
    ["HAIR", "Singed; may be matted/beaded; clothes may be torn/shredded", "Current path indicator"],
    ["BURNS", "May be minimal; linear; feathering; punctate", "Entry at top of head (direct); soles of feet (ground current)"],
    ["EYES", "Unilateral or bilateral cataract (delayed); retinal detachment; corneal burns", "Delayed complication"],
    ["HEART", "VF; asystole; myocardial injury; cardiac arrest", "Primary cause of death"],
    ["EARS", "TM rupture; ossicular disruption; hearing loss", "Barotrauma from blast wave"],
    ["CLOTHING", "Shredded/torn/vaporized; metalwork fused; shoes blown off", "Characteristic of lightning"],
    ["KERAUNOPARALYSIS", "Temporary paralysis (vasospasm) of limbs; pulseless; cold; resolves", "Unique to lightning; must not confuse with spinal injury"],
  ],
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  { colW: [2.4, 3.5, 3.8], fontSize: 9.5, rowH: 0.35 }
);

// Slide 10.4 - Electrical vs Lightning Comparison
s = pres.addSlide();
slideHeader(s, "Electrical Injury vs Lightning Injury - Key Differences", "F5A623");
addTable(s,
  ["Feature", "ELECTRICAL INJURY", "LIGHTNING INJURY"],
  [
    ["Voltage", "110-500,000V (domestic/industrial)", "30 million volts"],
    ["Current", "Prolonged contact (seconds-minutes)", "VERY BRIEF (1/1000 - 1/100 sec)"],
    ["Mechanism", "Joule heating; tetanic contraction; VF", "Flashover; blast; massive short-duration discharge"],
    ["Entry/Exit wounds", "Well-defined; craters; metallization", "Punctate/linear; may be absent or at head/feet"],
    ["Lichtenberg figures", "ABSENT", "PRESENT (pathognomonic)"],
    ["Clothing", "Burns along body", "BLOWN OFF / Shredded / vaporized"],
    ["Magnetization", "ABSENT", "Metal objects MAGNETIZED"],
    ["Type of burn", "Deep burns along path; internal>>external", "Surface flash burns; limited depth"],
    ["Eye changes", "Cataracts (rare)", "Cataracts COMMON; retinal injury"],
    ["Keraunoparalysis", "Absent", "PRESENT (temporary limb paralysis)"],
    ["COHb", "Possible (if fire)", "Usually absent"],
    ["Multiple victims", "Rare (single contact)", "Common (ground current/side flash)"],
    ["CPR success", "Lower", "HIGHER (reversible cardiac arrest)"],
  ],
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  { colW: [2.2, 3.75, 3.75], fontSize: 9.5, rowH: 0.31 }
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// =========================== SUMMARY SLIDE ===========================
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s.addShape(pres.shapes.RECTANGLE, { x: 0, y: 0, w: 10, h: 0.06, fill: { color: C.accent } });
s.addShape(pres.shapes.RECTANGLE, { x: 0, y: 5.56, w: 10, h: 0.065, fill: { color: C.accent } });
s.addText("SUMMARY", { x: 0.3, y: 0.15, w: 9.4, h: 0.5, fontSize: 28, bold: true, color: C.white, align: "center", fontFace: "Calibri" });
const summaryItems = [
  ["HEAT INJURIES", "Cramps → Exhaustion → Stroke; Local: Burns/Scalds/Chemical/Electrical/Radiation"],
  ["BURNS", "4 Degrees; Rule of Nines; Minor/Moderate/Major classification"],
  ["PM BURNS", "Pugilistic attitude; Heat hematoma; Soot in airways; COHb; Vital reactions"],
  ["HEAT vs EDH", "Heat: PM, honeycomb, no fracture, dura attached | EDH: AM, trauma, MMA tear, dura stripped"],
  ["AM vs PM BURNS", "AM: vital reaction, COHb, protein in blisters, soot below glottis | PM: opposite"],
  ["DRY/MOIST/CHEM", "Dry: charring, pattern; Scald: blisters, child abuse; Chemical: acid coag/alkali liquefaction"],
  ["EXPLOSION", "Primary/Secondary/Tertiary/Quaternary; Blast lung; TM rupture; Fragmentation"],
  ["COLD", "Hypothermia <35°C; Frostbite 4 grades; Wischnewski spots; Paradoxical undressing"],
  ["ELECTRICAL", "Current kills; VF at 100mA; Joule burns; Entry/exit wounds; Metallization"],
  ["LIGHTNING", "Lichtenberg figures; Magnetization; Keraunoparalysis; Clothing shredded"],
];
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s.addText("Reference: Reddy's The Essentials of Forensic Medicine & Toxicology, 34th Ed. | Gautam Vishwas - Forensic Medicine & Toxicology", {
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// Write file
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