from reportlab.lib.pagesizes import A4
from reportlab.lib import colors
from reportlab.lib.units import cm, mm
from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.lib.enums import TA_CENTER, TA_LEFT, TA_JUSTIFY
from reportlab.platypus import (
    SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle,
    PageBreak, HRFlowable, KeepTogether
)
from reportlab.graphics.shapes import Drawing, Rect, String, Line, Circle, Polygon
from reportlab.graphics import renderPDF
from reportlab.platypus.flowables import Flowable
import reportlab.lib.colors as rlcolors

# ── Colour palette ──────────────────────────────────────────────────────────
NAVY      = colors.HexColor("#0D1B4B")
DARK_BLUE = colors.HexColor("#1A2B6B")
GOLD      = colors.HexColor("#F5A623")
RED_BADGE = colors.HexColor("#C0392B")
WHITE     = colors.white
LIGHT_BG  = colors.HexColor("#F0F4FF")
TEAL      = colors.HexColor("#1ABC9C")
ORANGE    = colors.HexColor("#E67E22")
PURPLE    = colors.HexColor("#8E44AD")

W, H = A4  # 595 x 842 pt

# ── Custom Flowable: full-width coloured banner ──────────────────────────────
class Banner(Flowable):
    def __init__(self, text, bg=NAVY, fg=WHITE, font_size=20, height=40):
        super().__init__()
        self.text = text
        self.bg   = bg
        self.fg   = fg
        self.font_size = font_size
        self.height = height
        self.width  = W - 4*cm   # will be set during wrap

    def wrap(self, aW, aH):
        self.width = aW
        return aW, self.height

    def draw(self):
        c = self.canv
        c.setFillColor(self.bg)
        c.rect(0, 0, self.width, self.height, fill=1, stroke=0)
        c.setFillColor(self.fg)
        c.setFont("Helvetica-Bold", self.font_size)
        c.drawCentredString(self.width / 2, self.height / 2 - self.font_size * 0.35, self.text)


class SectionHeader(Flowable):
    """Left-accented section header."""
    def __init__(self, text, accent=GOLD, font_size=14, height=30):
        super().__init__()
        self.text = text
        self.accent = accent
        self.font_size = font_size
        self.height = height

    def wrap(self, aW, aH):
        self.width = aW
        return aW, self.height

    def draw(self):
        c = self.canv
        c.setFillColor(self.accent)
        c.rect(0, 0, 6, self.height, fill=1, stroke=0)
        c.setFillColor(NAVY)
        c.setFont("Helvetica-Bold", self.font_size)
        c.drawString(12, self.height / 2 - self.font_size * 0.35, self.text)


class CoverPage(Flowable):
    """Full A4 cover drawn programmatically."""
    def __init__(self):
        super().__init__()

    def wrap(self, aW, aH):
        return aW, aH

    def draw(self):
        c = self.canv
        pw = W - 4*cm   # page printable width (after margins)
        ph = H - 4*cm

        # ── Background gradient simulation (dark blue rectangles) ──
        for i in range(30):
            frac = i / 30
            col = colors.linearlyInterpolatedColor(NAVY, DARK_BLUE, 0, 1, frac)
            c.setFillColor(col)
            c.rect(0, ph - (i+1)*(ph/30), pw, ph/30 + 1, fill=1, stroke=0)

        # ECG-like decorative line
        c.setStrokeColor(colors.HexColor("#1E90FF"))
        c.setLineWidth(2)
        c.setDash([4, 2])
        c.line(0, ph * 0.38, pw, ph * 0.38)
        c.setDash([])

        # ── "PACKAGE" badge ──────────────────────────────────────────
        badge_w, badge_h = 110, 26
        c.setFillColor(GOLD)
        c.roundRect(10, ph - 55, badge_w, badge_h, 4, fill=1, stroke=0)
        c.setFillColor(NAVY)
        c.setFont("Helvetica-Bold", 13)
        c.drawCentredString(10 + badge_w/2, ph - 55 + 7, "PACKAGE")

        # ── Main headline: 150+ ──────────────────────────────────────
        c.setFillColor(WHITE)
        c.setFont("Helvetica-Bold", 52)
        c.drawString(10, ph - 110, "150+")

        # OPD badge
        c.setFillColor(GOLD)
        c.roundRect(150, ph - 118, 80, 34, 5, fill=1, stroke=0)
        c.setFillColor(NAVY)
        c.setFont("Helvetica-Bold", 22)
        c.drawCentredString(190, ph - 104, "OPD")

        # AND
        c.setFillColor(WHITE)
        c.setFont("Helvetica-Bold", 16)
        c.drawString(240, ph - 105, "AND")

        # 80+
        c.setFont("Helvetica-Bold", 52)
        c.drawString(10, ph - 162, "80+")

        # EMERGENCY badge
        c.setFillColor(RED_BADGE)
        c.roundRect(150, ph - 170, 165, 34, 5, fill=1, stroke=0)
        c.setFillColor(WHITE)
        c.setFont("Helvetica-Bold", 22)
        c.drawCentredString(232, ph - 156, "EMERGENCY")

        # CONFIDENCE
        c.setFillColor(WHITE)
        c.setFont("Helvetica-Bold", 40)
        c.drawString(10, ph - 210, "CONFIDENCE")

        # EBOOK BUNDLE label
        c.setFillColor(GOLD)
        c.roundRect(10, ph - 255, 230, 34, 5, fill=1, stroke=0)
        c.setFillColor(NAVY)
        c.setFont("Helvetica-Bold", 22)
        c.drawCentredString(125, ph - 241, "EBOOK BUNDLE")

        # Subtitle
        c.setFillColor(WHITE)
        c.setFont("Helvetica", 11)
        c.drawString(10, ph - 278, "Step-by-step guides to handle")
        c.drawString(10, ph - 292, "OPD & Emergency situations with confidence.")

        # ── Feature icons row ────────────────────────────────────────
        icons = [("300+\nTOPICS", TEAL), ("PRACTICAL\nAPPROACH", GOLD),
                 ("ALL SPECIALTIES\nCOVERED", ORANGE), ("REAL CASE\nEXAMPLES", PURPLE),
                 ("BUILDS\nCONFIDENCE", RED_BADGE)]
        ix = 10
        for label, col in icons:
            c.setFillColor(col)
            c.circle(ix + 20, ph - 325, 14, fill=1, stroke=0)
            c.setFillColor(WHITE)
            c.setFont("Helvetica-Bold", 7)
            lines = label.split("\n")
            for li, ln in enumerate(lines):
                c.drawCentredString(ix + 20, ph - 328 + (len(lines)-1-li)*8, ln)
            ix += 68

        # ── Specialty list (right side) ───────────────────────────────
        specialties = ["MEDICINE", "DERMA", "PEDIA", "ORTHO", "OBG", "SURGERY", "PSYCHIATRY"]
        sx = pw - 155
        sy_start = ph - 90
        c.setFillColor(colors.HexColor("#1A2B6B"))
        c.roundRect(sx - 5, sy_start - len(specialties)*22 - 5, 150, len(specialties)*22 + 15, 6, fill=1, stroke=0)
        for i, sp in enumerate(specialties):
            c.setFillColor(WHITE)
            c.setFont("Helvetica-Bold", 11)
            c.drawCentredString(sx + 70, sy_start - i*22 - 5, sp)

        # ── Branding ─────────────────────────────────────────────────
        c.setFillColor(WHITE)
        c.setFont("Helvetica-Bold", 14)
        c.drawString(10, ph - 380, "Team  Medped")
        c.setFont("Helvetica", 9)
        c.setFillColor(GOLD)
        c.drawString(10, ph - 394, "medped.in")


def build_ebook():
    output_path = "/tmp/workspace/medped-ebook/Medped_OPD_Emergency_Confidence_Ebook.pdf"
    doc = SimpleDocTemplate(
        output_path,
        pagesize=A4,
        leftMargin=2*cm,
        rightMargin=2*cm,
        topMargin=2*cm,
        bottomMargin=2*cm,
        title="OPD & Emergency Confidence Ebook Bundle",
        author="Team Medped",
    )

    styles = getSampleStyleSheet()

    # Custom styles
    title_style = ParagraphStyle("Title2", parent=styles["Title"],
        fontSize=26, textColor=NAVY, spaceAfter=6, alignment=TA_CENTER,
        fontName="Helvetica-Bold")
    heading_style = ParagraphStyle("Heading2", parent=styles["Heading2"],
        fontSize=15, textColor=NAVY, spaceBefore=14, spaceAfter=4,
        fontName="Helvetica-Bold")
    body_style = ParagraphStyle("Body2", parent=styles["Normal"],
        fontSize=10.5, leading=16, spaceAfter=6, alignment=TA_JUSTIFY)
    bullet_style = ParagraphStyle("Bullet", parent=styles["Normal"],
        fontSize=10.5, leading=15, leftIndent=14, bulletIndent=4,
        spaceAfter=4)
    small_style = ParagraphStyle("Small", parent=styles["Normal"],
        fontSize=9, textColor=colors.grey, leading=13)
    red_heading = ParagraphStyle("RedH", parent=styles["Heading3"],
        fontSize=12, textColor=RED_BADGE, spaceBefore=10, spaceAfter=4,
        fontName="Helvetica-Bold")
    gold_heading = ParagraphStyle("GoldH", parent=styles["Heading3"],
        fontSize=12, textColor=colors.HexColor("#C07A00"), spaceBefore=10, spaceAfter=4,
        fontName="Helvetica-Bold")
    teal_heading = ParagraphStyle("TealH", parent=styles["Heading3"],
        fontSize=12, textColor=TEAL, spaceBefore=10, spaceAfter=4,
        fontName="Helvetica-Bold")

    def bullet(text, icon="•"):
        return Paragraph(f"<b>{icon}</b>  {text}", bullet_style)

    def warning_box(text):
        data = [[Paragraph(f"<font color='#C0392B'><b>⚠ RED FLAG / WARNING:</b></font><br/>{text}", body_style)]]
        t = Table(data, colWidths=[doc.width])
        t.setStyle(TableStyle([
            ("BACKGROUND", (0,0), (-1,-1), colors.HexColor("#FFF5F5")),
            ("BOX",        (0,0), (-1,-1), 1.5, RED_BADGE),
            ("LEFTPADDING",(0,0), (-1,-1), 10),
            ("RIGHTPADDING",(0,0),(-1,-1), 10),
            ("TOPPADDING", (0,0), (-1,-1), 8),
            ("BOTTOMPADDING",(0,0),(-1,-1), 8),
        ]))
        return t

    def tip_box(text):
        data = [[Paragraph(f"<font color='#1ABC9C'><b>✔ CLINICAL TIP:</b></font><br/>{text}", body_style)]]
        t = Table(data, colWidths=[doc.width])
        t.setStyle(TableStyle([
            ("BACKGROUND", (0,0), (-1,-1), colors.HexColor("#F0FFF8")),
            ("BOX",        (0,0), (-1,-1), 1.5, TEAL),
            ("LEFTPADDING",(0,0), (-1,-1), 10),
            ("RIGHTPADDING",(0,0),(-1,-1), 10),
            ("TOPPADDING", (0,0), (-1,-1), 8),
            ("BOTTOMPADDING",(0,0),(-1,-1), 8),
        ]))
        return t

    def case_box(title, text):
        data = [[Paragraph(f"<font color='#8E44AD'><b>📋 {title}</b></font><br/>{text}", body_style)]]
        t = Table(data, colWidths=[doc.width])
        t.setStyle(TableStyle([
            ("BACKGROUND", (0,0), (-1,-1), colors.HexColor("#FAF5FF")),
            ("BOX",        (0,0), (-1,-1), 1.5, PURPLE),
            ("LEFTPADDING",(0,0), (-1,-1), 10),
            ("RIGHTPADDING",(0,0),(-1,-1), 10),
            ("TOPPADDING", (0,0), (-1,-1), 8),
            ("BOTTOMPADDING",(0,0),(-1,-1), 8),
        ]))
        return t

    # ─────────────────────────────────────────────────────────────────────────
    story = []

    # ── COVER ────────────────────────────────────────────────────────────────
    story.append(CoverPage())
    story.append(PageBreak())

    # ── TABLE OF CONTENTS ────────────────────────────────────────────────────
    story.append(Banner("TABLE OF CONTENTS", bg=NAVY, font_size=18, height=44))
    story.append(Spacer(1, 0.4*cm))

    toc_data = [
        ["#", "Section", "Page"],
        ["1", "Introduction & How to Use This Book", "4"],
        ["2", "MEDICINE – Common OPD & Emergency Cases", "5"],
        ["3", "DERMATOLOGY – Skin Conditions in OPD", "10"],
        ["4", "PAEDIATRICS – Child Health OPD & Emergencies", "14"],
        ["5", "ORTHOPAEDICS – MSK OPD & Trauma", "18"],
        ["6", "OBG – Obstetrics & Gynaecology", "22"],
        ["7", "SURGERY – Surgical OPD & Emergencies", "26"],
        ["8", "PSYCHIATRY – Mental Health in OPD", "30"],
        ["9", "Quick Reference Drug Doses", "34"],
        ["10","Emergency Protocols at a Glance", "36"],
    ]
    toc_table = Table(toc_data, colWidths=[1.2*cm, 12.5*cm, 2*cm])
    toc_table.setStyle(TableStyle([
        ("BACKGROUND",    (0,0), (-1,0),  NAVY),
        ("TEXTCOLOR",     (0,0), (-1,0),  WHITE),
        ("FONTNAME",      (0,0), (-1,0),  "Helvetica-Bold"),
        ("FONTSIZE",      (0,0), (-1,0),  11),
        ("ROWBACKGROUNDS",(0,1), (-1,-1), [colors.HexColor("#F5F8FF"), WHITE]),
        ("FONTNAME",      (0,1), (-1,-1), "Helvetica"),
        ("FONTSIZE",      (0,1), (-1,-1), 10),
        ("ALIGN",         (0,0), (0,-1),  "CENTER"),
        ("ALIGN",         (2,0), (2,-1),  "CENTER"),
        ("GRID",          (0,0), (-1,-1), 0.5, colors.HexColor("#CCCCCC")),
        ("TOPPADDING",    (0,0), (-1,-1), 7),
        ("BOTTOMPADDING", (0,0), (-1,-1), 7),
    ]))
    story.append(toc_table)
    story.append(PageBreak())

    # ── INTRODUCTION ─────────────────────────────────────────────────────────
    story.append(Banner("INTRODUCTION & HOW TO USE THIS BOOK", bg=DARK_BLUE, height=40))
    story.append(Spacer(1, 0.3*cm))
    story.append(Paragraph("Welcome to the <b>Medped OPD &amp; Emergency Confidence Ebook Bundle</b>", title_style))
    story.append(Spacer(1, 0.2*cm))
    story.append(Paragraph(
        "This ebook bundle is designed for medical students, interns, and junior doctors who want "
        "to handle OPD consultations and emergency situations with <b>real confidence</b> — from day one. "
        "Each chapter follows a consistent, practical structure so you know exactly what to do, step by step.",
        body_style))
    story.append(Spacer(1, 0.3*cm))
    story.append(SectionHeader("How Each Chapter is Organised", accent=GOLD))
    story.append(Spacer(1, 0.2*cm))
    features = [
        ("📖 Condition Overview", "Brief pathophysiology & why it matters clinically."),
        ("🩺 How to Approach in OPD", "History, examination, and key questions to ask."),
        ("⚡ Emergency Management", "Step-by-step stabilisation and treatment protocol."),
        ("📋 Real Case Examples", "Short cases with decision-making walkthrough."),
        ("⚠ Red Flags", "Critical warning signs you must never miss."),
        ("✔ Clinical Tips", "Pearls from experienced clinicians."),
        ("💊 Drug Doses", "First-line medications with adult and paediatric doses."),
    ]
    feat_data = [[Paragraph(f"<b>{k}</b>", body_style), Paragraph(v, body_style)] for k, v in features]
    feat_table = Table(feat_data, colWidths=[5.5*cm, 10.2*cm])
    feat_table.setStyle(TableStyle([
        ("ROWBACKGROUNDS",(0,0),(-1,-1),[colors.HexColor("#EEF3FF"), WHITE]),
        ("GRID",(0,0),(-1,-1),0.3,colors.HexColor("#CCCCCC")),
        ("TOPPADDING",(0,0),(-1,-1),6),("BOTTOMPADDING",(0,0),(-1,-1),6),
        ("LEFTPADDING",(0,0),(-1,-1),8),("RIGHTPADDING",(0,0),(-1,-1),8),
    ]))
    story.append(feat_table)
    story.append(PageBreak())

    # ═══════════════════════════════════════════════════════════════════════════
    #  CHAPTER 1 – MEDICINE
    # ═══════════════════════════════════════════════════════════════════════════
    story.append(Banner("CHAPTER 1: MEDICINE", bg=NAVY, height=44, font_size=20))
    story.append(Spacer(1, 0.3*cm))
    story.append(Paragraph("Common OPD &amp; Emergency Cases", title_style))
    story.append(HRFlowable(color=GOLD, thickness=2, width="100%"))
    story.append(Spacer(1, 0.3*cm))

    # ── 1.1 Hypertension ──────────────────────────────────────────────────────
    story.append(SectionHeader("1.1  Hypertension in OPD", accent=TEAL))
    story.append(Paragraph(
        "Hypertension is the most common non-communicable disease encountered in general OPD. "
        "Defined as persistent BP ≥140/90 mmHg on two separate visits.",
        body_style))
    story.append(Paragraph("<b>OPD Approach:</b>", gold_heading))
    for item in [
        "Take complete history: duration, medications, family history, lifestyle.",
        "Measure BP in both arms after 5 min rest (seated).",
        "Look for secondary causes: renal bruit, moon face, buffalo hump.",
        "Fundoscopy for hypertensive retinopathy (grade I–IV).",
        "Order: RFT, Urine R/E, ECG, echo if indicated.",
    ]:
        story.append(bullet(item))
    story.append(Spacer(1, 0.2*cm))
    story.append(tip_box(
        "Always measure BP after the patient has rested for 5 minutes. "
        "White-coat hypertension accounts for up to 20% of OPD HTN diagnoses — "
        "consider 24h ABPM before starting lifelong therapy."))
    story.append(Spacer(1, 0.2*cm))
    story.append(Paragraph("<b>First-Line Drugs (JNC 8 / Indian Guidelines):</b>", gold_heading))
    drug_data = [
        ["Drug Class", "Example", "Adult Dose", "Notes"],
        ["ACE Inhibitor", "Enalapril", "5–40 mg/day", "Avoid in pregnancy, bilateral RAS"],
        ["ARB", "Losartan", "50–100 mg/day", "Better tolerability than ACEI"],
        ["CCB", "Amlodipine", "5–10 mg/day", "Good for elderly, Afro-origin"],
        ["Thiazide", "Hydrochlorthiazide", "12.5–25 mg/day", "Check electrolytes"],
    ]
    drug_table = Table(drug_data, colWidths=[3.5*cm, 3.5*cm, 4*cm, 4.7*cm])
    drug_table.setStyle(TableStyle([
        ("BACKGROUND",(0,0),(-1,0),NAVY),("TEXTCOLOR",(0,0),(-1,0),WHITE),
        ("FONTNAME",(0,0),(-1,0),"Helvetica-Bold"),
        ("ROWBACKGROUNDS",(0,1),(-1,-1),[colors.HexColor("#F5F8FF"),WHITE]),
        ("GRID",(0,0),(-1,-1),0.4,colors.HexColor("#AAAAAA")),
        ("FONTSIZE",(0,0),(-1,-1),9),
        ("TOPPADDING",(0,0),(-1,-1),5),("BOTTOMPADDING",(0,0),(-1,-1),5),
    ]))
    story.append(drug_table)
    story.append(Spacer(1, 0.3*cm))
    story.append(warning_box(
        "Hypertensive Emergency: BP >180/120 + end-organ damage. "
        "Admit, IV Labetalol / Sodium Nitroprusside. Target: reduce MAP by 25% in first hour. "
        "Do NOT drop BP too fast — risk of stroke/MI."))
    story.append(Spacer(1, 0.3*cm))
    story.append(case_box("CASE 1.1",
        "A 52-year-old male with BP 170/100 on two readings, no symptoms. "
        "ECG shows LVH. Urine albumin 1+. Creatinine 1.3 mg/dL.<br/>"
        "<b>Management:</b> Start ARB (Losartan 50 mg), low-salt diet, aerobic exercise 30 min/day. "
        "Repeat RFT in 2 weeks. Target BP &lt;130/80 (diabetic/renal)."))
    story.append(PageBreak())

    # ── 1.2 Diabetes Mellitus ─────────────────────────────────────────────────
    story.append(SectionHeader("1.2  Diabetes Mellitus – OPD Management", accent=TEAL))
    story.append(Paragraph(
        "Diabetes mellitus type 2 is epidemic in India, with over 77 million diagnosed. "
        "OPD management focuses on glycaemic control, screening for complications, and "
        "patient education.",
        body_style))
    for item in [
        "Check FPG, PP2h glucose, HbA1c (target &lt;7% for most adults).",
        "Annual screening: feet (neuropathy), eyes (retinopathy), urine ACR (nephropathy), BP.",
        "First-line drug: Metformin 500 mg BD with meals (titrate to 2 g/day).",
        "Add SGLT2 inhibitor (Empagliflozin) if CVD risk or CKD.",
        "Add GLP-1 RA (Semaglutide) for obesity-driven T2DM.",
    ]:
        story.append(bullet(item))
    story.append(Spacer(1, 0.2*cm))
    story.append(tip_box(
        "SMBG (self-monitoring blood glucose) 4 times/day is ideal for insulin-requiring patients. "
        "For those on oral agents alone, fasting + post-lunch checks are sufficient."))
    story.append(Spacer(1, 0.2*cm))
    story.append(warning_box(
        "Hypoglycaemia Emergency: Glucose &lt;54 mg/dL + symptoms. "
        "Conscious: 15g oral glucose (3 teaspoons sugar). "
        "Unconscious: IV 25% Dextrose 50 mL bolus + glucagon 1 mg IM. "
        "Identify and correct the cause."))
    story.append(Spacer(1, 0.3*cm))

    # ── 1.3 Acute Chest Pain ──────────────────────────────────────────────────
    story.append(SectionHeader("1.3  Acute Chest Pain – Emergency Protocol", accent=RED_BADGE, font_size=13))
    story.append(Paragraph(
        "Every chest pain patient should be triaged as <b>cardiac until proven otherwise</b>. "
        "Use the MONA protocol for ACS.",
        body_style))
    mona = [
        ["M", "Morphine", "2–4 mg IV (pain relief, use with caution)"],
        ["O", "Oxygen", "Only if SpO2 &lt;90%"],
        ["N", "Nitrates", "GTN 0.5 mg sublingual (avoid if hypotensive)"],
        ["A", "Aspirin", "325 mg loading dose PO immediately"],
    ]
    mona_t = Table(mona, colWidths=[1.5*cm, 3.5*cm, 10.7*cm])
    mona_t.setStyle(TableStyle([
        ("BACKGROUND",(0,0),(-1,-1),colors.HexColor("#FFF0F0")),
        ("FONTNAME",(0,0),(0,-1),"Helvetica-Bold"),
        ("TEXTCOLOR",(0,0),(0,-1),RED_BADGE),
        ("FONTSIZE",(0,0),(0,-1),14),
        ("GRID",(0,0),(-1,-1),0.4,colors.HexColor("#FFCCCC")),
        ("TOPPADDING",(0,0),(-1,-1),6),("BOTTOMPADDING",(0,0),(-1,-1),6),
    ]))
    story.append(mona_t)
    story.append(Spacer(1, 0.2*cm))
    story.append(tip_box(
        "ECG within 10 minutes of arrival is the single most important investigation. "
        "ST elevation in II, III, aVF → Inferior STEMI (RCA). "
        "ST elevation in V1–V4 → Anterior STEMI (LAD)."))
    story.append(PageBreak())

    # ═══════════════════════════════════════════════════════════════════════════
    #  CHAPTER 2 – DERMATOLOGY
    # ═══════════════════════════════════════════════════════════════════════════
    story.append(Banner("CHAPTER 2: DERMATOLOGY", bg=colors.HexColor("#1A5276"), height=44, font_size=20))
    story.append(Spacer(1, 0.3*cm))
    story.append(Paragraph("Skin Conditions in OPD", title_style))
    story.append(HRFlowable(color=ORANGE, thickness=2, width="100%"))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("2.1  Urticaria (Hives)", accent=ORANGE))
    story.append(Paragraph(
        "Urticaria presents as intensely pruritic wheals (hives) that migrate and resolve within "
        "24 hours. Acute urticaria lasts &lt;6 weeks; chronic urticaria persists beyond 6 weeks.",
        body_style))
    story.append(Paragraph("<b>Common Triggers:</b>", gold_heading))
    for t in ["Foods: nuts, shellfish, eggs, strawberries",
              "Drugs: NSAIDs, penicillin, ACE inhibitors",
              "Infections: viral URTI, parasites",
              "Physical: pressure, cold, heat, exercise"]:
        story.append(bullet(t))
    story.append(Paragraph("<b>Treatment:</b>", gold_heading))
    for t in ["Non-sedating antihistamine: Cetirizine 10 mg OD or Fexofenadine 180 mg OD",
              "If no response: up to 4x dose of non-sedating AH (guideline approved)",
              "Severe/angioedema: Adrenaline 0.5 mg IM (1:1000) + prednisolone 40 mg"]:
        story.append(bullet(t))
    story.append(Spacer(1, 0.2*cm))
    story.append(warning_box(
        "Angioedema of the tongue/larynx can be fatal. Give adrenaline 0.5 mg IM IMMEDIATELY "
        "and prepare for emergency airway management."))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("2.2  Acne Vulgaris", accent=ORANGE))
    story.append(Paragraph(
        "Acne is a disease of pilosebaceous units, classified as comedonal, papulopustular, "
        "or nodulocystic.",
        body_style))
    acne_data = [
        ["Severity", "Treatment"],
        ["Mild (comedonal)", "Topical retinoid (tretinoin 0.025%)"],
        ["Moderate (papulopustular)", "Topical retinoid + Benzoyl peroxide + Topical antibiotic"],
        ["Severe (nodulocystic)", "Oral isotretinoin 0.5–1 mg/kg/day for 6 months"],
    ]
    acne_t = Table(acne_data, colWidths=[5.5*cm, 10.2*cm])
    acne_t.setStyle(TableStyle([
        ("BACKGROUND",(0,0),(-1,0),colors.HexColor("#1A5276")),
        ("TEXTCOLOR",(0,0),(-1,0),WHITE),
        ("FONTNAME",(0,0),(-1,0),"Helvetica-Bold"),
        ("ROWBACKGROUNDS",(0,1),(-1,-1),[colors.HexColor("#EBF5FB"),WHITE]),
        ("GRID",(0,0),(-1,-1),0.4,colors.HexColor("#AAAAAA")),
        ("TOPPADDING",(0,0),(-1,-1),6),("BOTTOMPADDING",(0,0),(-1,-1),6),
        ("LEFTPADDING",(0,0),(-1,-1),8),
    ]))
    story.append(acne_t)
    story.append(Spacer(1, 0.2*cm))
    story.append(tip_box("Counsel patients on isotretinoin: mandatory contraception in women "
                         "(teratogenic), monthly LFTs, lipids, and haemogram."))
    story.append(PageBreak())

    # ═══════════════════════════════════════════════════════════════════════════
    #  CHAPTER 3 – PAEDIATRICS
    # ═══════════════════════════════════════════════════════════════════════════
    story.append(Banner("CHAPTER 3: PAEDIATRICS", bg=colors.HexColor("#1E8449"), height=44, font_size=20))
    story.append(Spacer(1, 0.3*cm))
    story.append(Paragraph("Child Health – OPD &amp; Emergencies", title_style))
    story.append(HRFlowable(color=TEAL, thickness=2, width="100%"))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("3.1  Febrile Seizures", accent=TEAL))
    story.append(Paragraph(
        "Febrile seizures occur in children aged 6 months–5 years with fever &gt;38°C. "
        "Simple febrile seizures: generalised, &lt;15 min, once in 24 h. "
        "Complex: focal, &gt;15 min, or recur within 24 h.",
        body_style))
    story.append(Paragraph("<b>Immediate Management:</b>", gold_heading))
    for step in [
        "Position: lateral decubitus (recovery position) to prevent aspiration.",
        "Airway: suction if needed, give O₂ via mask.",
        "Check glucose immediately (exclude hypoglycaemia).",
        "IV/rectal diazepam 0.3 mg/kg (max 10 mg) if seizure &gt;5 min.",
        "If seizure continues: IV lorazepam 0.1 mg/kg OR midazolam buccal 0.2 mg/kg.",
        "After 2 benzodiazepine doses: IV phenytoin 20 mg/kg over 20 min.",
    ]:
        story.append(bullet(step))
    story.append(Spacer(1, 0.2*cm))
    story.append(warning_box(
        "Status epilepticus = seizure &gt;30 min or two seizures without recovery. "
        "This is a MEDICAL EMERGENCY — proceed to RSI and ICU if refractory."))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("3.2  Acute Diarrhoea & Dehydration", accent=TEAL))
    story.append(Paragraph(
        "Dehydration assessment in children uses the DHAKA scale (or WHO classification): "
        "no dehydration, some dehydration, severe dehydration.",
        body_style))
    deh_data = [
        ["Sign", "No Dehydration", "Some Dehydration", "Severe Dehydration"],
        ["Eyes", "Normal", "Sunken", "Very sunken"],
        ["Tears", "Present", "Absent", "Absent"],
        ["Skin pinch", "Goes back quickly", "Slow (&lt;2s)", "Very slow (&gt;2s)"],
        ["Thirst", "Normal", "Drinks eagerly", "Drinks poorly/unable"],
        ["Plan", "Plan A (ORS at home)", "Plan B (supervised ORS)", "Plan C (IV fluids)"],
    ]
    deh_t = Table(deh_data, colWidths=[3.5*cm, 3.8*cm, 3.8*cm, 4.6*cm])
    deh_t.setStyle(TableStyle([
        ("BACKGROUND",(0,0),(-1,0),colors.HexColor("#1E8449")),
        ("TEXTCOLOR",(0,0),(-1,0),WHITE),
        ("FONTNAME",(0,0),(-1,0),"Helvetica-Bold"),
        ("ROWBACKGROUNDS",(0,1),(-1,-1),[colors.HexColor("#EAFAF1"),WHITE]),
        ("GRID",(0,0),(-1,-1),0.4,colors.HexColor("#AAAAAA")),
        ("FONTSIZE",(0,0),(-1,-1),9),
        ("TOPPADDING",(0,0),(-1,-1),5),("BOTTOMPADDING",(0,0),(-1,-1),5),
    ]))
    story.append(deh_t)
    story.append(PageBreak())

    # ═══════════════════════════════════════════════════════════════════════════
    #  CHAPTER 4 – ORTHOPAEDICS
    # ═══════════════════════════════════════════════════════════════════════════
    story.append(Banner("CHAPTER 4: ORTHOPAEDICS", bg=colors.HexColor("#7D3C98"), height=44, font_size=20))
    story.append(Spacer(1, 0.3*cm))
    story.append(Paragraph("MSK OPD &amp; Trauma", title_style))
    story.append(HRFlowable(color=PURPLE, thickness=2, width="100%"))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("4.1  Fracture Management Principles", accent=PURPLE))
    for item in [
        "Immobilise the joint above and below the fracture.",
        "Neurovascular assessment: pulse, capillary refill, sensation, motor power.",
        "X-ray: minimum 2 views (AP + lateral), include joint above & below.",
        "Open fracture: IV antibiotics (co-amoxiclav), tetanus, urgent ortho referral.",
        "Compartment syndrome: 6 Ps — Pain, Pallor, Paraesthesia, Paralysis, Pulselessness, Pressure.",
    ]:
        story.append(bullet(item))
    story.append(Spacer(1, 0.2*cm))
    story.append(warning_box(
        "Compartment syndrome is a surgical emergency. Do NOT elevate the limb above heart level. "
        "Emergency fasciotomy is required if compartment pressure &gt;30 mmHg."))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("4.2  Low Back Pain in OPD", accent=PURPLE))
    story.append(Paragraph(
        "95% of low back pain is non-specific (mechanical). The key OPD skill is "
        "identifying the 5% with serious pathology ('red flags').",
        body_style))
    story.append(Paragraph("<b>Red Flags for Serious Spinal Pathology:</b>", red_heading))
    for rf in ["Age &lt;20 or &gt;55 with first episode",
               "Trauma / significant mechanism",
               "Constant, progressive, non-mechanical pain",
               "Bowel/bladder dysfunction (cauda equina — EMERGENCY)",
               "Bilateral leg weakness or saddle anaesthesia",
               "History of malignancy, HIV, TB, steroids"]:
        story.append(bullet(rf, "🔴"))
    story.append(Spacer(1, 0.2*cm))
    story.append(tip_box(
        "Cauda equina syndrome: urinary retention + saddle anaesthesia = "
        "neurosurgical emergency. MRI spine urgently and refer."))
    story.append(PageBreak())

    # ═══════════════════════════════════════════════════════════════════════════
    #  CHAPTER 5 – OBG
    # ═══════════════════════════════════════════════════════════════════════════
    story.append(Banner("CHAPTER 5: OBSTETRICS & GYNAECOLOGY (OBG)", bg=colors.HexColor("#B03A2E"), height=44, font_size=17))
    story.append(Spacer(1, 0.3*cm))
    story.append(Paragraph("OBG – OPD &amp; Obstetric Emergencies", title_style))
    story.append(HRFlowable(color=RED_BADGE, thickness=2, width="100%"))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("5.1  Antepartum Haemorrhage (APH)", accent=RED_BADGE))
    story.append(Paragraph(
        "APH is bleeding from the genital tract after 28 weeks of gestation. "
        "The two major causes are placenta praevia and abruptio placentae.",
        body_style))
    apb_data = [
        ["Feature", "Placenta Praevia", "Abruptio Placentae"],
        ["Pain", "Painless", "Painful (board-like abdomen)"],
        ["Bleeding", "Bright red, recurrent", "Dark red, may be concealed"],
        ["Uterus", "Soft, non-tender", "Tense, tender"],
        ["Fetal parts", "Malpresentation common", "Heard with difficulty"],
        ["Dx", "USG (low-lying placenta)", "Clinical + USG"],
    ]
    apb_t = Table(apb_data, colWidths=[4*cm, 5.8*cm, 5.9*cm])
    apb_t.setStyle(TableStyle([
        ("BACKGROUND",(0,0),(-1,0),colors.HexColor("#B03A2E")),
        ("TEXTCOLOR",(0,0),(-1,0),WHITE),
        ("FONTNAME",(0,0),(-1,0),"Helvetica-Bold"),
        ("ROWBACKGROUNDS",(0,1),(-1,-1),[colors.HexColor("#FDEDEC"),WHITE]),
        ("GRID",(0,0),(-1,-1),0.4,colors.HexColor("#AAAAAA")),
        ("FONTSIZE",(0,0),(-1,-1),9),
        ("TOPPADDING",(0,0),(-1,-1),5),("BOTTOMPADDING",(0,0),(-1,-1),5),
    ]))
    story.append(apb_t)
    story.append(Spacer(1, 0.2*cm))
    story.append(warning_box(
        "NEVER do a vaginal examination in APH before an USG — in placenta praevia "
        "this can cause catastrophic haemorrhage. Always USG first."))
    story.append(PageBreak())

    # ═══════════════════════════════════════════════════════════════════════════
    #  CHAPTER 6 – SURGERY
    # ═══════════════════════════════════════════════════════════════════════════
    story.append(Banner("CHAPTER 6: SURGERY", bg=colors.HexColor("#1A5276"), height=44, font_size=20))
    story.append(Spacer(1, 0.3*cm))
    story.append(Paragraph("Surgical OPD &amp; Emergencies", title_style))
    story.append(HRFlowable(color=colors.HexColor("#2980B9"), thickness=2, width="100%"))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("6.1  Acute Abdomen – Emergency Approach", accent=colors.HexColor("#2980B9")))
    story.append(Paragraph(
        "Acute abdomen refers to sudden, severe abdominal pain requiring urgent evaluation. "
        "A systematic approach prevents missed diagnoses.",
        body_style))
    story.append(Paragraph("<b>SURGICAL SIEVE — Causes by Quadrant:</b>", gold_heading))
    quad_data = [
        ["Right Upper Quadrant", "Right Lower Quadrant", "Left Upper Quadrant", "Left Lower Quadrant"],
        ["Cholecystitis, Biliary colic, Hepatitis", "Appendicitis, Ectopic (female), Psoas abscess",
         "Splenic rupture, Pancreatitis", "Diverticulitis, Ectopic, Sigmoid volvulus"],
    ]
    quad_t = Table(quad_data, colWidths=[4*cm]*4)
    quad_t.setStyle(TableStyle([
        ("BACKGROUND",(0,0),(-1,0),colors.HexColor("#1A5276")),
        ("TEXTCOLOR",(0,0),(-1,0),WHITE),
        ("FONTNAME",(0,0),(-1,0),"Helvetica-Bold"),
        ("FONTSIZE",(0,0),(-1,-1),8.5),
        ("ROWBACKGROUNDS",(0,1),(-1,-1),[colors.HexColor("#EBF5FB")]),
        ("GRID",(0,0),(-1,-1),0.4,colors.HexColor("#AAAAAA")),
        ("TOPPADDING",(0,0),(-1,-1),6),("BOTTOMPADDING",(0,0),(-1,-1),6),
        ("LEFTPADDING",(0,0),(-1,-1),5),
    ]))
    story.append(quad_t)
    story.append(Spacer(1, 0.2*cm))
    story.append(tip_box(
        "Rovsing's sign (RLQ pain on palpation of LLQ) and Psoas sign (pain on hip extension) "
        "suggest appendicitis. Alvarado score ≥7 = strong likelihood, proceed to surgical review."))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("6.2  Wound Management in OPD", accent=colors.HexColor("#2980B9")))
    for item in [
        "Irrigate: copious saline irrigation (minimum 200 mL per cm wound length).",
        "Debridement: remove devitalised tissue.",
        "Golden period: primary closure within 6–8 hours (facial wounds: up to 24 h).",
        "Contaminated/bite wounds: secondary closure or delayed primary closure.",
        "Tetanus prophylaxis: check vaccination status. Give TT if &gt;5 years or unknown.",
        "Antibiotics: only if clinically infected, bites, or immunocompromised.",
    ]:
        story.append(bullet(item))
    story.append(PageBreak())

    # ═══════════════════════════════════════════════════════════════════════════
    #  CHAPTER 7 – PSYCHIATRY
    # ═══════════════════════════════════════════════════════════════════════════
    story.append(Banner("CHAPTER 7: PSYCHIATRY", bg=colors.HexColor("#4A235A"), height=44, font_size=20))
    story.append(Spacer(1, 0.3*cm))
    story.append(Paragraph("Mental Health in OPD", title_style))
    story.append(HRFlowable(color=PURPLE, thickness=2, width="100%"))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("7.1  Acute Psychosis – OPD & Emergency", accent=PURPLE))
    story.append(Paragraph(
        "Acute psychosis presents with hallucinations, delusions, disorganised behaviour. "
        "Always rule out organic causes first (delirium, drugs, metabolic).",
        body_style))
    story.append(Paragraph("<b>Rapid Tranquilisation (if patient is agitated/dangerous):</b>", gold_heading))
    for item in [
        "Haloperidol 5 mg IM + Promethazine 25–50 mg IM (Rx of choice in resource-limited settings).",
        "OR Lorazepam 2 mg IM (first choice if cause unknown — less extrapyramidal effects).",
        "Monitor: vital signs every 15 min for 1 hour, ECG (QTc prolongation with haloperidol).",
        "Prepare for: hypotension, respiratory depression.",
    ]:
        story.append(bullet(item))
    story.append(Spacer(1, 0.2*cm))
    story.append(warning_box(
        "Never use haloperidol alone in benzodiazepine or alcohol withdrawal — "
        "it lowers seizure threshold. Use benzodiazepines as the primary agent."))
    story.append(Spacer(1, 0.3*cm))

    story.append(SectionHeader("7.2  Depression – OPD Screening & Management", accent=PURPLE))
    story.append(Paragraph(
        "Use PHQ-9 for screening. Score ≥10 suggests moderate depression. "
        "Always ask about suicidal ideation directly.",
        body_style))
    story.append(case_box("CASE 7.1",
        "A 34-year-old woman presents with 6 weeks of low mood, poor sleep, anhedonia, "
        "weight loss of 4 kg, and difficulty concentrating at work. PHQ-9 score = 16.<br/>"
        "<b>Management:</b> Start SSRI (Sertraline 50 mg OD), psychotherapy referral (CBT), "
        "safety plan for suicidal thoughts, follow-up in 2 weeks. "
        "Review at 4 weeks for SSRI response."))
    story.append(PageBreak())

    # ═══════════════════════════════════════════════════════════════════════════
    #  QUICK REFERENCE – DRUG DOSES
    # ═══════════════════════════════════════════════════════════════════════════
    story.append(Banner("QUICK REFERENCE: EMERGENCY DRUG DOSES", bg=RED_BADGE, height=44, font_size=17))
    story.append(Spacer(1, 0.3*cm))
    story.append(Paragraph("Adult doses unless otherwise stated. Always verify locally.", small_style))
    story.append(Spacer(1, 0.2*cm))

    qr_data = [
        ["Drug", "Indication", "Dose & Route", "Notes"],
        ["Adrenaline (Epinephrine)", "Anaphylaxis/Cardiac arrest",
         "0.5 mg IM (1:1000)\n1 mg IV (1:10000) CPR",
         "Repeat every 5 min in arrest"],
        ["Atropine", "Bradycardia (symptomatic)",
         "0.5–1 mg IV bolus (max 3 mg)", "Repeat every 3–5 min"],
        ["Dextrose 50%", "Hypoglycaemia",
         "50 mL IV bolus", "Flush line with saline after"],
        ["Diazepam", "Seizure",
         "0.3 mg/kg IV/rectal", "Max 10 mg; watch respiration"],
        ["GTN (Nitroglycerine)", "ACS / Hyp. urgency",
         "0.5 mg SL; repeat x2", "Hold if SBP &lt;90 or RV infarct"],
        ["Hydrocortisone", "Anaphylaxis / Adrenal crisis",
         "200 mg IV bolus", "Followed by 200 mg/24h infusion"],
        ["Labetalol", "Hyp. emergency",
         "20 mg IV bolus over 2 min; repeat", "Or 2 mg/min infusion"],
        ["Magnesium Sulphate", "Eclampsia",
         "4 g IV loading, 1 g/h maint.", "Monitor: urine output, reflexes"],
        ["Morphine", "Severe pain / ACS",
         "2–4 mg IV titrated", "Caution in COPD, head injury"],
        ["Naloxone", "Opioid overdose",
         "0.4–2 mg IV/IM; repeat q2–3 min", "Short-acting — watch for re-sedation"],
        ["Salbutamol", "Acute asthma",
         "2.5–5 mg nebulised q20 min", "Continuous neb in severe attack"],
        ["Sodium Bicarbonate", "Severe metabolic acidosis",
         "1 mEq/kg IV slowly", "Use with caution; check ABG"],
    ]
    qr_t = Table(qr_data, colWidths=[4*cm, 3.5*cm, 5*cm, 3.2*cm])
    qr_t.setStyle(TableStyle([
        ("BACKGROUND",(0,0),(-1,0),RED_BADGE),
        ("TEXTCOLOR",(0,0),(-1,0),WHITE),
        ("FONTNAME",(0,0),(-1,0),"Helvetica-Bold"),
        ("ROWBACKGROUNDS",(0,1),(-1,-1),[colors.HexColor("#FFF5F5"),WHITE]),
        ("GRID",(0,0),(-1,-1),0.4,colors.HexColor("#AAAAAA")),
        ("FONTSIZE",(0,0),(-1,-1),8.5),
        ("TOPPADDING",(0,0),(-1,-1),5),("BOTTOMPADDING",(0,0),(-1,-1),5),
        ("LEFTPADDING",(0,0),(-1,-1),5),
        ("VALIGN",(0,0),(-1,-1),"MIDDLE"),
    ]))
    story.append(qr_t)
    story.append(PageBreak())

    # ═══════════════════════════════════════════════════════════════════════════
    #  EMERGENCY PROTOCOLS AT A GLANCE
    # ═══════════════════════════════════════════════════════════════════════════
    story.append(Banner("EMERGENCY PROTOCOLS AT A GLANCE", bg=NAVY, height=44, font_size=18))
    story.append(Spacer(1, 0.3*cm))

    protocols = [
        ("BLS / CPR", TEAL, [
            "Call for help + note time",
            "30 chest compressions (100–120/min, 5–6 cm depth)",
            "2 rescue breaths (if trained)",
            "Attach AED as soon as available",
            "Minimise interruptions — switch compressor every 2 minutes",
            "Adrenaline 1 mg IV q3–5 min (after 3rd shock for shockable rhythm)",
        ]),
        ("Anaphylaxis", RED_BADGE, [
            "Remove trigger, call for help",
            "Adrenaline 0.5 mg IM (anterolateral thigh, 1:1000)",
            "Lay flat + legs elevated (unless breathless)",
            "High-flow O₂, IV access, fluid bolus (500 mL 0.9% NaCl)",
            "Chlorphenamine 10 mg IV + Hydrocortisone 200 mg IV",
            "Repeat adrenaline after 5 min if no improvement",
        ]),
        ("Acute Asthma Attack", ORANGE, [
            "Salbutamol 5 mg nebulised + O₂ (keep SpO2 94–98%)",
            "Ipratropium 0.5 mg nebulised (add if severe)",
            "Prednisolone 40–50 mg PO or Hydrocortisone 100 mg IV",
            "IV MgSO₄ 1.2–2 g over 20 min in life-threatening attack",
            "Prepare for intubation if PaCO₂ rising or patient tires",
        ]),
        ("Stroke (FAST Protocol)", PURPLE, [
            "Face drooping, Arm weakness, Speech difficulty, Time to call",
            "Non-contrast CT head immediately (exclude haemorrhage)",
            "thrombolysis with IV alteplase (0.9 mg/kg, max 90 mg) within 4.5 h if eligible",
            "Thrombectomy if large vessel occlusion within 24 h",
            "BP target: &lt;185/110 before thrombolysis",
            "Aspirin 300 mg ONLY after haemorrhage excluded",
        ]),
    ]

    for proto_title, color, steps in protocols:
        story.append(SectionHeader(proto_title, accent=color, font_size=13))
        for i, step in enumerate(steps, 1):
            story.append(bullet(step, f"{i}."))
        story.append(Spacer(1, 0.2*cm))

    story.append(Spacer(1, 0.3*cm))
    story.append(HRFlowable(color=GOLD, thickness=2, width="100%"))
    story.append(Spacer(1, 0.3*cm))

    # ── Back cover / closing ──────────────────────────────────────────────────
    story.append(Banner("Thank You for Choosing Medped", bg=GOLD, fg=NAVY, height=50, font_size=20))
    story.append(Spacer(1, 0.5*cm))
    story.append(Paragraph(
        "This ebook bundle has been compiled by <b>Team Medped</b> to equip you with the "
        "knowledge and confidence to handle real OPD and emergency situations effectively. "
        "We believe that <b>every patient deserves a confident doctor</b>.",
        body_style))
    story.append(Spacer(1, 0.3*cm))
    story.append(Paragraph(
        "For updates, full video courses, and case-based learning, visit us at <b>medped.in</b>. "
        "Follow us on social media for daily clinical pearls.",
        body_style))
    story.append(Spacer(1, 0.3*cm))
    disc_data = [[Paragraph(
        "<font size='8' color='grey'><b>Disclaimer:</b> This ebook is for educational purposes only. "
        "Clinical decisions must always be based on individual patient assessment, local guidelines, "
        "and the judgment of a qualified medical professional. Drug doses should be verified against "
        "current formularies. Team Medped accepts no liability for clinical outcomes.</font>",
        body_style)]]
    disc_t = Table(disc_data, colWidths=[doc.width])
    disc_t.setStyle(TableStyle([
        ("BACKGROUND",(0,0),(-1,-1),colors.HexColor("#F8F9FA")),
        ("BOX",(0,0),(-1,-1),0.5,colors.grey),
        ("LEFTPADDING",(0,0),(-1,-1),10),("RIGHTPADDING",(0,0),(-1,-1),10),
        ("TOPPADDING",(0,0),(-1,-1),8),("BOTTOMPADDING",(0,0),(-1,-1),8),
    ]))
    story.append(disc_t)

    # ── Build ─────────────────────────────────────────────────────────────────
    def add_header_footer(canvas, document):
        canvas.saveState()
        page_num = document.page
        canvas.setFont("Helvetica", 8)
        canvas.setFillColor(colors.grey)
        # Footer
        canvas.drawString(2*cm, 1.2*cm, "© Team Medped  |  medped.in")
        canvas.drawRightString(W - 2*cm, 1.2*cm, f"Page {page_num}")
        canvas.setStrokeColor(GOLD)
        canvas.setLineWidth(1)
        canvas.line(2*cm, 1.6*cm, W - 2*cm, 1.6*cm)
        # Header (skip cover page)
        if page_num > 1:
            canvas.setFont("Helvetica-Bold", 9)
            canvas.setFillColor(NAVY)
            canvas.drawString(2*cm, H - 1.6*cm, "Medped  OPD & Emergency Confidence Ebook Bundle")
            canvas.setStrokeColor(NAVY)
            canvas.setLineWidth(0.5)
            canvas.line(2*cm, H - 1.8*cm, W - 2*cm, H - 1.8*cm)
        canvas.restoreState()

    doc.build(story, onFirstPage=add_header_footer, onLaterPages=add_header_footer)
    print(f"PDF built: {output_path}")
    return output_path

build_ebook()