const {
  Document, Packer, Paragraph, TextRun, Table, TableRow, TableCell,
  Header, Footer, AlignmentType, HeadingLevel, BorderStyle, WidthType,
  ShadingType, VerticalAlign, PageNumber, PageBreak,
  TableOfContents, UnderlineType
} = require('docx');
const fs = require('fs');

// ─── Colour palette ────────────────────────────────────────────────────────
const NAVY    = "1A237E";
const BLUE    = "1565C0";
const GREEN   = "1B5E20";
const ORANGE  = "BF360C";
const PURPLE  = "4A148C";
const TEAL    = "006064";
const RED     = "B71C1C";
const GREY_BG = "F5F5FF";
const BLUE_BG = "E3F2FD";
const GRN_BG  = "E8F5E9";
const ORG_BG  = "FFF3E0";
const PUR_BG  = "F3E5F5";
const TEL_BG  = "E0F7FA";
const RED_BG  = "FFEBEE";
const YEL_BG  = "FFFDE7";
const WHITE   = "FFFFFF";

// ─── Helpers ───────────────────────────────────────────────────────────────

function spacer(pts = 120) {
  return new Paragraph({ spacing: { before: pts, after: 0 }, children: [] });
}

function sectionTitle(text, colorHex) {
  return new Paragraph({
    heading: HeadingLevel.HEADING_1,
    spacing: { before: 340, after: 120 },
    shading: { type: ShadingType.SOLID, color: colorHex, fill: colorHex },
    children: [
      new TextRun({
        text: `  ${text}  `,
        color: WHITE,
        bold: true,
        size: 28,
        font: "Calibri",
      }),
    ],
  });
}

function subTitle(text, colorHex = NAVY) {
  return new Paragraph({
    heading: HeadingLevel.HEADING_2,
    spacing: { before: 220, after: 80 },
    children: [
      new TextRun({ text, color: colorHex, bold: true, size: 24, font: "Calibri" }),
    ],
  });
}

function bodyPara(text, bold = false, color = "222222") {
  return new Paragraph({
    spacing: { before: 60, after: 60 },
    children: [new TextRun({ text, bold, color, size: 22, font: "Calibri" })],
  });
}

function bullet(text, colorHex = NAVY) {
  return new Paragraph({
    bullet: { level: 0 },
    spacing: { before: 40, after: 40 },
    children: [new TextRun({ text, color: colorHex, size: 22, font: "Calibri" })],
  });
}

function colorBox(children, fillHex, borderHex) {
  // Simulated coloured box using a 1-cell table
  return new Table({
    width: { size: 100, type: WidthType.PERCENTAGE },
    margins: { top: 100, bottom: 100 },
    rows: [
      new TableRow({
        children: [
          new TableCell({
            shading: { type: ShadingType.SOLID, color: fillHex, fill: fillHex },
            borders: {
              top:    { style: BorderStyle.SINGLE, size: 12, color: borderHex },
              bottom: { style: BorderStyle.SINGLE, size: 12, color: borderHex },
              left:   { style: BorderStyle.SINGLE, size: 12, color: borderHex },
              right:  { style: BorderStyle.SINGLE, size: 12, color: borderHex },
            },
            margins: { top: 120, bottom: 120, left: 180, right: 180 },
            children,
          }),
        ],
      }),
    ],
  });
}

function definitionTable(rows, headerColor) {
  // rows = [[term, meaning, example], ...]
  const headerRow = new TableRow({
    tableHeader: true,
    children: [
      { text: "Term", w: 20 },
      { text: "Meaning", w: 35 },
      { text: "Clinical / Body Example", w: 45 },
    ].map(({ text, w }) =>
      new TableCell({
        width: { size: w, type: WidthType.PERCENTAGE },
        shading: { type: ShadingType.SOLID, color: headerColor, fill: headerColor },
        verticalAlign: VerticalAlign.CENTER,
        children: [
          new Paragraph({
            alignment: AlignmentType.CENTER,
            children: [new TextRun({ text, color: WHITE, bold: true, size: 20, font: "Calibri" })],
          }),
        ],
      })
    ),
  });

  const dataRows = rows.map((row, ri) => {
    const bg = ri % 2 === 0 ? WHITE : "F8F9FF";
    return new TableRow({
      children: row.map((cell, ci) =>
        new TableCell({
          width: { size: [20, 35, 45][ci], type: WidthType.PERCENTAGE },
          shading: { type: ShadingType.SOLID, color: bg, fill: bg },
          verticalAlign: VerticalAlign.CENTER,
          children: [
            new Paragraph({
              children: [
                new TextRun({
                  text: cell,
                  bold: ci === 0,
                  color: ci === 0 ? headerColor : "333333",
                  size: 20,
                  font: "Calibri",
                }),
              ],
            }),
          ],
        })
      ),
    });
  });

  return new Table({
    width: { size: 100, type: WidthType.PERCENTAGE },
    rows: [headerRow, ...dataRows],
  });
}

function mcqBlock(num, question, options, answer, explanation) {
  const optLetters = ["A", "B", "C", "D", "E"];
  return [
    spacer(160),
    new Paragraph({
      spacing: { before: 60, after: 40 },
      children: [
        new TextRun({ text: `Q${num}.  `, color: NAVY, bold: true, size: 23, font: "Calibri" }),
        new TextRun({ text: question, color: "111111", size: 22, font: "Calibri" }),
      ],
    }),
    ...options.map((opt, i) =>
      new Paragraph({
        indent: { left: 440 },
        spacing: { before: 30, after: 30 },
        children: [
          new TextRun({
            text: `${optLetters[i]}.  ${opt}`,
            color: optLetters[i] === answer ? GREEN : "444444",
            bold: optLetters[i] === answer,
            size: 21,
            font: "Calibri",
          }),
        ],
      })
    ),
    colorBox(
      [
        new Paragraph({
          children: [
            new TextRun({ text: `Answer: ${answer}  |  `, color: GREEN, bold: true, size: 20, font: "Calibri" }),
            new TextRun({ text: explanation, color: "1B5E20", size: 20, font: "Calibri" }),
          ],
        }),
      ],
      GRN_BG, GREEN
    ),
  ];
}

function tfBlock(num, statement, isTrue, explanation) {
  return [
    spacer(120),
    new Paragraph({
      spacing: { before: 60, after: 40 },
      children: [
        new TextRun({ text: `Q${num}.  `, color: PURPLE, bold: true, size: 23, font: "Calibri" }),
        new TextRun({ text: statement, color: "111111", size: 22, font: "Calibri" }),
      ],
    }),
    new Paragraph({
      indent: { left: 440 },
      spacing: { before: 20, after: 20 },
      children: [new TextRun({ text: "A.  True       B.  False", color: "555555", size: 21, font: "Calibri" })],
    }),
    colorBox(
      [
        new Paragraph({
          children: [
            new TextRun({ text: `Answer: ${isTrue ? "True" : "False"}  |  `, color: PURPLE, bold: true, size: 20, font: "Calibri" }),
            new TextRun({ text: explanation, color: "4A148C", size: 20, font: "Calibri" }),
          ],
        }),
      ],
      PUR_BG, PURPLE
    ),
  ];
}

function shortAnswerBlock(num, question, answer) {
  return [
    spacer(120),
    new Paragraph({
      spacing: { before: 60, after: 40 },
      children: [
        new TextRun({ text: `Q${num}.  `, color: ORANGE, bold: true, size: 23, font: "Calibri" }),
        new TextRun({ text: question, color: "111111", size: 22, font: "Calibri" }),
      ],
    }),
    new Paragraph({
      indent: { left: 440 },
      spacing: { before: 10, after: 10 },
      children: [new TextRun({ text: "Answer: _______________________________________________", color: "AAAAAA", size: 21, font: "Calibri" })],
    }),
    colorBox(
      [
        new Paragraph({
          children: [
            new TextRun({ text: "Model Answer: ", color: ORANGE, bold: true, size: 20, font: "Calibri" }),
            new TextRun({ text: answer, color: "BF360C", size: 20, font: "Calibri" }),
          ],
        }),
      ],
      ORG_BG, ORANGE
    ),
  ];
}

function matchingTable(pairs, leftHeader, rightHeader) {
  // pairs = [[left, right], ...]
  const headerRow = new TableRow({
    tableHeader: true,
    children: [leftHeader, rightHeader].map(txt =>
      new TableCell({
        shading: { type: ShadingType.SOLID, color: TEAL, fill: TEAL },
        children: [
          new Paragraph({
            alignment: AlignmentType.CENTER,
            children: [new TextRun({ text: txt, color: WHITE, bold: true, size: 20, font: "Calibri" })],
          }),
        ],
        width: { size: 50, type: WidthType.PERCENTAGE },
      })
    ),
  });
  const dataRows = pairs.map(([l, r], i) => {
    const bg = i % 2 === 0 ? WHITE : TEL_BG;
    return new TableRow({
      children: [l, r].map(txt =>
        new TableCell({
          shading: { type: ShadingType.SOLID, color: bg, fill: bg },
          children: [new Paragraph({ children: [new TextRun({ text: txt, size: 20, font: "Calibri", color: "222222" })] })],
          width: { size: 50, type: WidthType.PERCENTAGE },
        })
      ),
    });
  });
  return new Table({ width: { size: 100, type: WidthType.PERCENTAGE }, rows: [headerRow, ...dataRows] });
}

function labelledDiagramBox(title, items) {
  return colorBox(
    [
      new Paragraph({
        spacing: { before: 60, after: 60 },
        children: [new TextRun({ text: title, color: RED, bold: true, size: 22, font: "Calibri" })],
      }),
      ...items.map(item =>
        new Paragraph({
          bullet: { level: 0 },
          spacing: { before: 40, after: 40 },
          children: [new TextRun({ text: item, color: "B71C1C", size: 21, font: "Calibri" })],
        })
      ),
    ],
    RED_BG, RED
  );
}

function pageBreakPara() {
  return new Paragraph({ children: [new PageBreak()] });
}

// ─── DOCUMENT CONTENT ──────────────────────────────────────────────────────

const doc = new Document({
  numbering: {
    config: [
      {
        reference: "bullet-list",
        levels: [
          {
            level: 0,
            format: "bullet",
            text: "\u2022",
            alignment: AlignmentType.LEFT,
            style: { paragraph: { indent: { left: 440, hanging: 260 } } },
          },
        ],
      },
    ],
  },
  styles: {
    default: {
      document: {
        run: { font: "Calibri", size: 22 },
      },
    },
    paragraphStyles: [
      {
        id: "Heading1",
        name: "Heading 1",
        basedOn: "Normal",
        next: "Normal",
        run: { bold: true, color: WHITE, size: 28 },
      },
      {
        id: "Heading2",
        name: "Heading 2",
        basedOn: "Normal",
        next: "Normal",
        run: { bold: true, size: 24 },
      },
    ],
  },
  sections: [
    {
      headers: {
        default: new Header({
          children: [
            new Paragraph({
              alignment: AlignmentType.RIGHT,
              children: [
                new TextRun({ text: "Anatomical Nomenclature – Study Guide  |  Gray's Anatomy for Students", color: "888888", size: 18, font: "Calibri" }),
              ],
            }),
          ],
        }),
      },
      footers: {
        default: new Footer({
          children: [
            new Paragraph({
              alignment: AlignmentType.CENTER,
              children: [
                new TextRun({ text: "Page ", color: "888888", size: 18, font: "Calibri" }),
                new TextRun({ children: [PageNumber.CURRENT], color: "888888", size: 18, font: "Calibri" }),
                new TextRun({ text: " of ", color: "888888", size: 18, font: "Calibri" }),
                new TextRun({ children: [PageNumber.TOTAL_PAGES], color: "888888", size: 18, font: "Calibri" }),
              ],
            }),
          ],
        }),
      },
      children: [

        // ══════════════════════════════════════════════
        // COVER / TITLE
        // ══════════════════════════════════════════════
        spacer(600),
        new Paragraph({
          alignment: AlignmentType.CENTER,
          spacing: { before: 0, after: 100 },
          children: [
            new TextRun({
              text: "ANATOMICAL NOMENCLATURE",
              color: NAVY,
              bold: true,
              size: 52,
              font: "Calibri",
            }),
          ],
        }),
        new Paragraph({
          alignment: AlignmentType.CENTER,
          spacing: { before: 0, after: 80 },
          children: [
            new TextRun({ text: "Complete Study Guide & Practice Questions", color: BLUE, size: 32, font: "Calibri" }),
          ],
        }),
        new Paragraph({
          alignment: AlignmentType.CENTER,
          spacing: { before: 0, after: 60 },
          children: [
            new TextRun({ text: "Based on Gray's Anatomy for Students, Chapter 1, pp. 18–20", color: "555555", size: 22, font: "Calibri", italics: true }),
          ],
        }),
        colorBox([
          new Paragraph({ alignment: AlignmentType.CENTER, children: [new TextRun({ text: "Covers: Anatomical Position  ·  Planes  ·  Directional Terms  ·  Inclusive Terminology", color: NAVY, bold: true, size: 22, font: "Calibri" })] }),
          new Paragraph({ alignment: AlignmentType.CENTER, children: [new TextRun({ text: "MCQs  ·  True/False  ·  Short Answer  ·  Matching  ·  Labelling  ·  Clinical Scenarios  ·  Answer Key", color: NAVY, size: 20, font: "Calibri" })] }),
        ], BLUE_BG, BLUE),
        spacer(200),

        pageBreakPara(),

        // ══════════════════════════════════════════════
        // SECTION 1: CORE CONCEPTS REVIEW
        // ══════════════════════════════════════════════
        sectionTitle("SECTION 1 — CORE CONCEPTS REVIEW", NAVY),

        subTitle("What is Anatomical Nomenclature?", NAVY),
        bodyPara("Anatomical nomenclature is the standardised system of terms used to describe the location, orientation, and relationships of body structures. It provides a universal reference language so that any anatomist, clinician, or scientist can communicate precisely about the human body, regardless of language or background."),

        spacer(100),
        subTitle("1.1  The Anatomical Position", BLUE),
        colorBox([
          new Paragraph({ children: [new TextRun({ text: "All anatomical terms are defined relative to the Anatomical Position:", color: BLUE, bold: true, size: 21, font: "Calibri" })] }),
          spacer(60),
          ...[
            "Body standing upright",
            "Feet together, toes pointing forward",
            "Hands by the sides, palms facing forward",
            "Face looking forward; mouth closed, expression neutral",
            "Inferior margin of the orbit (bony edge below eye) is in the same horizontal plane as the top of the external auditory meatus (ear opening)",
            "Eyes open, focused in the distance",
          ].map(t => new Paragraph({ bullet: { level: 0 }, spacing: { before: 40, after: 40 }, children: [new TextRun({ text: t, color: "1A237E", size: 21, font: "Calibri" })] })),
        ], BLUE_BG, BLUE),

        spacer(120),
        subTitle("1.2  Anatomical Planes", GREEN),
        definitionTable([
          ["Coronal (Frontal)",      "Vertical",                     "Divides Anterior (front) vs Posterior (back)"],
          ["Sagittal",               "Vertical, perpendicular to coronal", "Divides Right vs Left parts"],
          ["Median Sagittal",        "Exactly through the midline",  "Divides body into EQUAL right and left halves"],
          ["Transverse (Axial/Horizontal)", "Horizontal",            "Divides Superior (upper) vs Inferior (lower)"],
        ], GREEN),

        spacer(120),
        subTitle("1.3  Terms of Direction", ORANGE),
        definitionTable([
          ["Anterior / Ventral",  "Toward the front",           "Nose is an anterior structure"],
          ["Posterior / Dorsal",  "Toward the back",            "Vertebral column is posterior to the sternum"],
          ["Medial",              "Closer to the midline",      "Nose is medial to the eyes"],
          ["Lateral",             "Away from the midline",      "Thumb is lateral to the little finger"],
          ["Superior",            "Toward the head",            "Head is superior to the shoulders"],
          ["Inferior",            "Toward the feet",            "Knee is inferior to the hip joint"],
          ["Proximal",            "Closer to origin/attachment","Glenohumeral joint is proximal to the elbow"],
          ["Distal",              "Farther from origin",        "Hand is distal to the elbow"],
          ["Cranial",             "Toward the head",            "Used in embryology; alternative to Superior"],
          ["Caudal",              "Toward the tail",            "Inferior end of the spine; used in comparative anatomy"],
          ["Rostral",             "Toward the nose (head/brain only)", "Forebrain is rostral to the hindbrain"],
          ["Superficial",         "Closer to body surface",     "Sternum is superficial to the heart"],
          ["Deep",                "Away from surface / inside deep fascia", "Stomach is deep to the abdominal wall"],
        ], ORANGE),

        spacer(120),
        subTitle("1.4  Inclusive Anatomical Terminology", PURPLE),
        bodyPara("Modern anatomy acknowledges that not all individuals fit a sex-binary model. The clinically preferred approach is to use the patient's own preferred anatomical terminology and to base clinical care on present anatomy rather than assumptions about gender identity."),
        spacer(60),
        definitionTable([
          ["Upper body",      "Chest / Breast",    "Used for trans and non-binary individuals"],
          ["Erectile tissue", "Penis / Clitoris",  "Describes function without assuming gender"],
          ["Gonads",          "Testes / Ovaries",  "Neutral term for reproductive organs"],
        ], PURPLE),

        pageBreakPara(),

        // ══════════════════════════════════════════════
        // SECTION 2: MULTIPLE CHOICE QUESTIONS
        // ══════════════════════════════════════════════
        sectionTitle("SECTION 2 — MULTIPLE CHOICE QUESTIONS (MCQs)", BLUE),
        bodyPara("Choose the single best answer for each question. Answers with explanations are provided below each question.", false, "555555"),

        ...mcqBlock(1,
          "In the anatomical position, the palms of the hands are facing:",
          ["Posteriorly (backward)", "Inferiorly (downward)", "Anteriorly (forward)", "Medially (inward)"],
          "C",
          "The anatomical position requires palms facing forward (anteriorly), which is key for defining terms like supination."
        ),

        ...mcqBlock(2,
          "The coronal (frontal) plane divides the body into which two parts?",
          ["Superior and inferior", "Right and left", "Anterior and posterior", "Medial and lateral"],
          "C",
          "The coronal plane is vertical and divides the body into anterior (front) and posterior (back) portions."
        ),

        ...mcqBlock(3,
          "Which term describes a structure that is closer to the point of attachment or origin of a limb?",
          ["Distal", "Lateral", "Proximal", "Superficial"],
          "C",
          "Proximal means closer to the origin or point of attachment. E.g., the shoulder is proximal to the elbow."
        ),

        ...mcqBlock(4,
          "The nose is described as __________ to the eyes.",
          ["Lateral", "Medial", "Posterior", "Inferior"],
          "B",
          "Medial means closer to the midline. The nose lies on the midline and is therefore medial to the eyes."
        ),

        ...mcqBlock(5,
          "Which plane divides the body into exactly equal right and left halves?",
          ["Coronal plane", "Transverse plane", "Sagittal plane", "Median sagittal plane"],
          "D",
          "The median sagittal plane passes exactly through the midline, creating equal right and left halves."
        ),

        ...mcqBlock(6,
          "The term 'rostral' is used specifically to describe position relative to the nose within:",
          ["The thorax", "The abdomen", "The head and brain", "The limbs"],
          "C",
          "Rostral is used exclusively within the head/brain context. E.g., the forebrain is rostral to the hindbrain."
        ),

        ...mcqBlock(7,
          "A surgeon notes the stomach is DEEP to the abdominal wall. This means the stomach is:",
          ["Closer to the skin surface", "On the posterior side", "Farther from the surface, inside the deep fascia", "Superior to the abdominal wall"],
          "C",
          "Deep means farther from the body surface, enclosed within the outer layer of deep fascia."
        ),

        ...mcqBlock(8,
          "The term 'caudal' refers to a direction toward:",
          ["The head", "The nose", "The tail / inferior end of the spine", "The anterior surface"],
          "C",
          "Caudal means toward the tail (inferior end of the spine). It is the opposite of cranial and an alternative to inferior."
        ),

        ...mcqBlock(9,
          "The transverse (axial) plane divides the body into which two sections?",
          ["Anterior and posterior", "Right and left", "Medial and lateral", "Superior and inferior"],
          "D",
          "The transverse plane is horizontal and divides the body into superior (upper) and inferior (lower) parts."
        ),

        ...mcqBlock(10,
          "Which of the following is a paired opposite of 'anterior'?",
          ["Medial", "Inferior", "Posterior", "Proximal"],
          "C",
          "Anterior (ventral) and posterior (dorsal) are directional opposites referring to front and back of the body."
        ),

        pageBreakPara(),

        // ══════════════════════════════════════════════
        // SECTION 3: TRUE / FALSE
        // ══════════════════════════════════════════════
        sectionTitle("SECTION 3 — TRUE / FALSE QUESTIONS", PURPLE),
        bodyPara("State whether each statement is True or False. Explanations are provided below each question.", false, "555555"),

        ...tfBlock(1, "In the anatomical position, the feet are placed apart with toes pointing outward.", false,
          "Feet should be TOGETHER with toes pointing FORWARD, not outward."),

        ...tfBlock(2, "The sagittal plane divides the body into left and right parts.", true,
          "Correct. A sagittal plane is vertical and perpendicular to the coronal plane, dividing left from right."),

        ...tfBlock(3, "The term 'superior' can always be used interchangeably with 'cranial' in all contexts.", false,
          "Cranial/caudal are typically reserved for embryology and comparative anatomy. Rostral is used in the head/brain. Superior/inferior is the standard clinical pair."),

        ...tfBlock(4, "The sternum is superficial to the heart.", true,
          "Correct. Superficial means closer to the body surface. The sternum is in the chest wall, superficial to the heart beneath it."),

        ...tfBlock(5, "The median sagittal plane divides the body into unequal right and left portions.", false,
          "The MEDIAN sagittal plane passes exactly through the midline, creating EQUAL right and left halves. Only a non-median sagittal plane creates unequal portions."),

        ...tfBlock(6, "The thumb is medial to the little finger when the hand is in the anatomical position.", false,
          "In anatomical position (palms forward), the thumb is on the LATERAL side and the little finger is on the MEDIAL side."),

        ...tfBlock(7, "Inclusive anatomical terminology recommends using the term 'gonads' instead of testes/ovaries when using non-binary language.", true,
          "Correct. 'Gonads' is the inclusive neutral term used for reproductive glands without implying gender."),

        ...tfBlock(8, "A proximal structure is farther from the point of attachment than a distal one.", false,
          "Proximal = CLOSER to origin. Distal = FARTHER from origin. These terms are reversed in the statement."),

        pageBreakPara(),

        // ══════════════════════════════════════════════
        // SECTION 4: SHORT ANSWER QUESTIONS
        // ══════════════════════════════════════════════
        sectionTitle("SECTION 4 — SHORT ANSWER QUESTIONS", ORANGE),
        bodyPara("Write a concise answer in the space provided. Model answers are shown below each question.", false, "555555"),

        ...shortAnswerBlock(1,
          "Define 'anatomical nomenclature' and explain why it is important in clinical practice.",
          "Anatomical nomenclature is the standardised system of terms describing location, orientation and relationships of body structures. It is important because it provides a universal reference language allowing any clinician or scientist worldwide to communicate precisely about the human body, regardless of their native language."
        ),

        ...shortAnswerBlock(2,
          "List the 6 key features of the anatomical position.",
          "(1) Body upright. (2) Feet together, toes forward. (3) Hands by sides, palms forward. (4) Face forward, mouth closed. (5) Inferior orbital margin level with top of external auditory meatus. (6) Eyes open, focused ahead."
        ),

        ...shortAnswerBlock(3,
          "Explain the difference between a sagittal plane and the median sagittal plane.",
          "A sagittal plane is any vertical plane perpendicular to the coronal plane that divides the body into left and right portions (not necessarily equal). The median sagittal plane is a specific sagittal plane that passes exactly through the midline, dividing the body into equal right and left halves."
        ),

        ...shortAnswerBlock(4,
          "Give one clinical example each for the terms 'proximal' and 'distal'.",
          "Proximal: The glenohumeral (shoulder) joint is proximal to the elbow. Distal: The hand is distal to the elbow. Both are used for limbs and linear structures such as blood vessels, nerves, and airways."
        ),

        ...shortAnswerBlock(5,
          "When is 'rostral' used, and how does it differ from 'cranial'?",
          "Rostral is used specifically within the head and brain to describe position relative to the nose (e.g., the forebrain is rostral to the hindbrain). Cranial simply means toward the head in general and is used as an alternative to 'superior' in embryology and comparative anatomy."
        ),

        ...shortAnswerBlock(6,
          "What is inclusive anatomical terminology and why is it clinically preferred?",
          "Inclusive anatomical terminology uses neutral terms (e.g., 'upper body' instead of chest/breast, 'gonads' instead of testes/ovaries) to accommodate transgender and non-binary patients. It is preferred because clinical care should be based on present anatomy, not assumptions about gender identity, and patients should have their own preferred terms respected."
        ),

        pageBreakPara(),

        // ══════════════════════════════════════════════
        // SECTION 5: MATCHING EXERCISES
        // ══════════════════════════════════════════════
        sectionTitle("SECTION 5 — MATCHING EXERCISES", TEAL),

        subTitle("5A — Match the term to its meaning", TEAL),
        bodyPara("Draw a line or write the matching letter in the space provided."),
        spacer(80),
        matchingTable([
          ["1. Anterior",    "A. Toward the body surface"],
          ["2. Posterior",   "B. Toward the feet"],
          ["3. Superior",    "C. Closer to the midline"],
          ["4. Inferior",    "D. Toward the front"],
          ["5. Medial",      "E. Toward the back"],
          ["6. Lateral",     "F. Toward the head"],
          ["7. Superficial", "G. Away from the midline"],
        ], "TERM", "MEANING"),

        spacer(120),
        colorBox([
          new Paragraph({ children: [new TextRun({ text: "Answer Key: 1-D  |  2-E  |  3-F  |  4-B  |  5-C  |  6-G  |  7-A", color: TEAL, bold: true, size: 20, font: "Calibri" })] }),
        ], TEL_BG, TEAL),

        spacer(180),
        subTitle("5B — Match the plane to what it divides", TEAL),
        spacer(80),
        matchingTable([
          ["1. Coronal (Frontal) Plane",        "A. Superior and inferior parts"],
          ["2. Sagittal Plane",                 "B. Anterior and posterior parts"],
          ["3. Median Sagittal Plane",           "C. Equal right and left halves"],
          ["4. Transverse (Axial) Plane",        "D. Right and left parts (not necessarily equal)"],
        ], "PLANE", "DIVIDES INTO"),
        spacer(100),
        colorBox([
          new Paragraph({ children: [new TextRun({ text: "Answer Key: 1-B  |  2-D  |  3-C  |  4-A", color: TEAL, bold: true, size: 20, font: "Calibri" })] }),
        ], TEL_BG, TEAL),

        spacer(180),
        subTitle("5C — Match the inclusive term to the traditional term it replaces", TEAL),
        spacer(80),
        matchingTable([
          ["1. Upper body",      "A. Testes / Ovaries"],
          ["2. Erectile tissue", "B. Chest / Breast"],
          ["3. Gonads",          "C. Penis / Clitoris"],
        ], "INCLUSIVE TERM", "REPLACES"),
        spacer(100),
        colorBox([
          new Paragraph({ children: [new TextRun({ text: "Answer Key: 1-B  |  2-C  |  3-A", color: TEAL, bold: true, size: 20, font: "Calibri" })] }),
        ], TEL_BG, TEAL),

        pageBreakPara(),

        // ══════════════════════════════════════════════
        // SECTION 6: LABELLING & FILL-IN-THE-BLANK
        // ══════════════════════════════════════════════
        sectionTitle("SECTION 6 — FILL-IN-THE-BLANK", RED),
        bodyPara("Complete each sentence using the correct anatomical term from the word bank below.", false, "555555"),
        spacer(60),
        colorBox([
          new Paragraph({ children: [new TextRun({ text: "Word Bank: ", color: RED, bold: true, size: 21, font: "Calibri" })] }),
          new Paragraph({ children: [new TextRun({ text: "anterior  |  posterior  |  medial  |  lateral  |  superior  |  inferior  |  proximal  |  distal  |  superficial  |  deep  |  cranial  |  caudal  |  rostral  |  coronal  |  sagittal  |  transverse", color: "B71C1C", size: 20, font: "Calibri", italics: true })] }),
        ], RED_BG, RED),

        spacer(100),
        ...[
          ["1.", "The nose is a(n) ______________ structure because it faces forward."],
          ["2.", "The vertebral column is ______________ to the sternum."],
          ["3.", "The ______________ plane divides the body into anterior and posterior parts."],
          ["4.", "A structure closer to the body surface is described as ______________."],
          ["5.", "The elbow is ______________ to the hand (farther from the shoulder)."],
          ["6.", "The knee is ______________ to the hip joint (nearer to the feet)."],
          ["7.", "In the brain, a structure toward the nose is described as ______________."],
          ["8.", "The ______________ plane divides the body into superior and inferior parts."],
          ["9.", "The nose is ______________ to the eyes (closer to the midline)."],
          ["10.", "The stomach is ______________ to the abdominal wall (farther from the surface)."],
        ].map(([num, text]) =>
          new Paragraph({
            spacing: { before: 80, after: 40 },
            children: [
              new TextRun({ text: `${num}  `, color: RED, bold: true, size: 21, font: "Calibri" }),
              new TextRun({ text, color: "333333", size: 21, font: "Calibri" }),
            ],
          })
        ),

        spacer(140),
        colorBox([
          new Paragraph({ children: [new TextRun({ text: "Answer Key:", color: RED, bold: true, size: 21, font: "Calibri" })] }),
          new Paragraph({ children: [new TextRun({ text: "1. anterior  |  2. posterior  |  3. coronal  |  4. superficial  |  5. distal  |  6. inferior  |  7. rostral  |  8. transverse  |  9. medial  |  10. deep", color: "B71C1C", size: 20, font: "Calibri" })] }),
        ], RED_BG, RED),

        pageBreakPara(),

        // ══════════════════════════════════════════════
        // SECTION 7: CLINICAL SCENARIO QUESTIONS
        // ══════════════════════════════════════════════
        sectionTitle("SECTION 7 — CLINICAL SCENARIO QUESTIONS", GREEN),
        bodyPara("Apply anatomical terms to real clinical descriptions. Model answers are provided.", false, "555555"),

        ...shortAnswerBlock("7.1",
          "A radiologist describes a lesion as being on the 'anterior surface of the liver, superficial to the hepatic parenchyma.' Explain what this means using anatomical terminology.",
          "The lesion is located on the front-facing surface of the liver (anterior = toward the front of the body in anatomical position). It is closer to the outer surface/capsule of the liver rather than deep within the hepatic tissue (superficial = closer to the body surface or, here, the organ surface)."
        ),

        ...shortAnswerBlock("7.2",
          "A physiotherapist documents that a patient has pain 3 cm distal to the medial epicondyle of the humerus. Translate this into plain language.",
          "The pain is located 3 cm below and further down the arm (distal = farther from the shoulder/origin) from the bony bump on the inner side (medial = closer to the midline) of the lower end of the upper arm bone (humerus/epicondyle)."
        ),

        ...shortAnswerBlock("7.3",
          "A neurosurgeon states that a tumour is located in the rostral part of the brainstem. What does this mean?",
          "Rostral is used in the head/brain to mean toward the nose. The rostral brainstem refers to the upper part of the brainstem (closest to the cerebral hemispheres/nose direction), i.e., the midbrain region, as opposed to the caudal brainstem (pons and medulla oblongata, toward the spinal cord)."
        ),

        ...shortAnswerBlock("7.4",
          "A patient who identifies as non-binary presents to clinic. The chart uses the term 'gonads' in the clinical notes. Why is this term preferred in this context?",
          "'Gonads' is an inclusive anatomical term that refers to the reproductive organs without specifying sex or gender (replacing 'testes' or 'ovaries'). Using such terms respects the patient's identity and ensures clinical care is based on present anatomy rather than assumptions about gender, as recommended by inclusive anatomical nomenclature guidelines."
        ),

        pageBreakPara(),

        // ══════════════════════════════════════════════
        // SECTION 8: OPPOSITE PAIRS EXERCISE
        // ══════════════════════════════════════════════
        sectionTitle("SECTION 8 — OPPOSITE PAIRS EXERCISE", NAVY),
        bodyPara("For each term, write its anatomical opposite and give a body example for both.", false, "555555"),
        spacer(80),
        new Table({
          width: { size: 100, type: WidthType.PERCENTAGE },
          rows: [
            new TableRow({
              tableHeader: true,
              children: ["Given Term", "Opposite Term", "Example of Given", "Example of Opposite"].map(t =>
                new TableCell({
                  shading: { type: ShadingType.SOLID, color: NAVY, fill: NAVY },
                  children: [new Paragraph({ alignment: AlignmentType.CENTER, children: [new TextRun({ text: t, color: WHITE, bold: true, size: 19, font: "Calibri" })] })],
                  width: { size: 25, type: WidthType.PERCENTAGE },
                })
              ),
            }),
            ...[ 
              ["Anterior", "Posterior", "Nose (faces front)", "Vertebral column (behind sternum)"],
              ["Superior", "Inferior",  "Head (above shoulders)", "Knee (below hip)"],
              ["Medial",   "Lateral",   "Nose (near midline)", "Thumb (outer side of hand)"],
              ["Proximal", "Distal",    "Shoulder (near origin)", "Hand (far from shoulder)"],
              ["Superficial","Deep",    "Sternum (near surface)", "Heart (under sternum)"],
              ["Cranial",  "Caudal",    "Toward the head", "Toward the tail/inferior spine"],
            ].map((row, ri) => {
              const bg = ri % 2 === 0 ? WHITE : BLUE_BG;
              return new TableRow({
                children: row.map((cell, ci) =>
                  new TableCell({
                    shading: { type: ShadingType.SOLID, color: bg, fill: bg },
                    children: [new Paragraph({ children: [new TextRun({ text: cell, bold: ci < 2, color: ci < 2 ? NAVY : "333333", size: 19, font: "Calibri" })] })],
                    width: { size: 25, type: WidthType.PERCENTAGE },
                  })
                ),
              });
            }),
          ],
        }),

        pageBreakPara(),

        // ══════════════════════════════════════════════
        // SECTION 9: RAPID-FIRE REVISION QUIZ
        // ══════════════════════════════════════════════
        sectionTitle("SECTION 9 — RAPID-FIRE REVISION QUIZ", ORG_M = "E65100"),
        bodyPara("Quick-fire questions — try to answer without looking at notes first! Answers follow.", false, "555555"),
        spacer(60),
        ...[ 
          ["1.",  "What is the reference posture for all anatomical terms?",                                  "The Anatomical Position"],
          ["2.",  "Name the plane that divides front from back.",                                              "Coronal (Frontal) Plane"],
          ["3.",  "Which directional term means 'toward the midline'?",                                       "Medial"],
          ["4.",  "Is the hand proximal or distal to the shoulder?",                                          "Distal (farther from the shoulder/origin)"],
          ["5.",  "What does 'ventral' mean?",                                                                "Anterior / toward the front"],
          ["6.",  "Which plane cuts the body into exactly equal halves?",                                     "Median Sagittal Plane"],
          ["7.",  "Where is 'rostral' used?",                                                                 "Within the head/brain only (toward the nose)"],
          ["8.",  "The heart is _____ to the sternum.",                                                       "Deep"],
          ["9.",  "What does the transverse plane divide?",                                                   "Superior (upper) and inferior (lower) parts"],
          ["10.", "Give the inclusive anatomical term for 'testes or ovaries'.",                              "Gonads"],
          ["11.", "Which term is the opposite of 'lateral'?",                                                 "Medial"],
          ["12.", "Name a structure that is posterior in the body.",                                          "Vertebral column (spine)"],
          ["13.", "In which fields are cranial/caudal most commonly used?",                                   "Embryology and comparative anatomy"],
          ["14.", "What does the clinically inclusive approach base care on?",                                "Present anatomy, not gender assumptions"],
          ["15.", "Is the glenohumeral joint proximal or distal to the wrist?",                               "Proximal"],
        ].flatMap(([num, q, a]) => [
          new Paragraph({
            spacing: { before: 80, after: 20 },
            children: [
              new TextRun({ text: `${num}  `, color: "E65100", bold: true, size: 21, font: "Calibri" }),
              new TextRun({ text: q, color: "222222", size: 21, font: "Calibri" }),
            ],
          }),
          colorBox([
            new Paragraph({ children: [new TextRun({ text: `Answer: ${a}`, color: "BF360C", bold: true, size: 19, font: "Calibri" })] }),
          ], ORG_BG, ORANGE),
        ]),

        pageBreakPara(),

        // ══════════════════════════════════════════════
        // SECTION 10: SUMMARY CHEAT SHEET
        // ══════════════════════════════════════════════
        sectionTitle("SECTION 10 — SUMMARY CHEAT SHEET", NAVY),
        bodyPara("Tear out and use for last-minute revision!", false, "555555"),
        spacer(80),
        definitionTable([
          ["Anterior / Ventral",     "Front",                        "Nose, navel, chest"],
          ["Posterior / Dorsal",     "Back",                         "Spine, gluteus, shoulder blades"],
          ["Superior",               "Above / toward head",          "Head > shoulders > hips"],
          ["Inferior",               "Below / toward feet",          "Feet < knees < hips"],
          ["Medial",                 "Toward midline",               "Nose, sternum, medial malleolus"],
          ["Lateral",                "Away from midline",            "Ears, shoulders, thumb"],
          ["Proximal",               "Closer to origin",             "Shoulder > elbow > wrist"],
          ["Distal",                 "Farther from origin",          "Fingers (most distal of hand)"],
          ["Cranial",                "Toward head",                  "Used in embryology"],
          ["Caudal",                 "Toward tail",                  "Sacrum is caudal to L5"],
          ["Rostral",                "Toward nose (brain only)",     "Forebrain rostral to hindbrain"],
          ["Superficial",            "Near surface",                 "Skin, superficial fascia"],
          ["Deep",                   "Away from surface",            "Skeletal muscle, viscera"],
          ["Coronal plane",          "Divides front / back",         "Anterior vs posterior"],
          ["Sagittal plane",         "Divides left / right",         "Right vs left sides"],
          ["Median sagittal plane",  "Equal halves",                 "Exact midline cut"],
          ["Transverse plane",       "Divides top / bottom",         "Superior vs inferior"],
        ], NAVY),

        spacer(180),
        colorBox([
          new Paragraph({ alignment: AlignmentType.CENTER, children: [new TextRun({ text: "Source: Gray's Anatomy for Students, Chapter 1 — Important Anatomical Terms, pp. 18–20", color: NAVY, size: 20, font: "Calibri", italics: true })] }),
        ], BLUE_BG, BLUE),

      ],
    },
  ],
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