from reportlab.lib.pagesizes import A4
from reportlab.lib import colors
from reportlab.lib.units import mm, cm
from reportlab.platypus import (
    SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle,
    HRFlowable, KeepTogether
)
from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.lib.enums import TA_CENTER, TA_LEFT, TA_JUSTIFY
from reportlab.platypus import PageBreak

OUTPUT = "/home/daytona/workspace/forensic-cheatsheet/Forensic_Ossification_Cheatsheet.pdf"

# ── Colour palette ──────────────────────────────────────────────────────────
NAVY     = colors.HexColor("#0D2B55")
CRIMSON  = colors.HexColor("#B22222")
GOLD     = colors.HexColor("#C8960C")
LTBLUE   = colors.HexColor("#D6E8F7")
LTGOLD   = colors.HexColor("#FFF8E1")
LTGREEN  = colors.HexColor("#E8F5E9")
LTRED    = colors.HexColor("#FFEBEE")
WHITE    = colors.white
GREY     = colors.HexColor("#F0F0F0")
DARKGREY = colors.HexColor("#555555")
MIDBLUE  = colors.HexColor("#1A4F8A")
TEAL     = colors.HexColor("#00695C")

doc = SimpleDocTemplate(
    OUTPUT,
    pagesize=A4,
    leftMargin=12*mm, rightMargin=12*mm,
    topMargin=12*mm, bottomMargin=12*mm,
    title="Forensic Medicine Quick Reference – Ossification & Medicolegal Definitions",
    author="Orris MD Forensics"
)

styles = getSampleStyleSheet()

def S(name, **kw):
    """Helper: clone a base style with overrides."""
    base = styles["Normal"]
    return ParagraphStyle(name, parent=base, **kw)

# ── Custom styles ────────────────────────────────────────────────────────────
TITLE_STYLE = S("Title",
    fontSize=18, leading=22, textColor=WHITE,
    fontName="Helvetica-Bold", alignment=TA_CENTER)

SUBTITLE_STYLE = S("Subtitle",
    fontSize=10, leading=13, textColor=LTBLUE,
    fontName="Helvetica", alignment=TA_CENTER)

SECTION_STYLE = S("Section",
    fontSize=11, leading=14, textColor=WHITE,
    fontName="Helvetica-Bold", alignment=TA_LEFT,
    leftIndent=4, spaceBefore=6, spaceAfter=2)

SUBSECTION_STYLE = S("Subsection",
    fontSize=9.5, leading=12, textColor=NAVY,
    fontName="Helvetica-Bold", spaceBefore=4, spaceAfter=2)

BODY_STYLE = S("Body",
    fontSize=8.5, leading=11.5, textColor=colors.black,
    fontName="Helvetica", spaceAfter=2)

BULLET_STYLE = S("Bullet",
    fontSize=8.5, leading=11.5, textColor=colors.black,
    fontName="Helvetica", leftIndent=10, spaceAfter=1,
    bulletIndent=4)

NOTE_STYLE = S("Note",
    fontSize=7.5, leading=10, textColor=DARKGREY,
    fontName="Helvetica-Oblique", leftIndent=6)

MNEMONIC_STYLE = S("Mnemonic",
    fontSize=8.5, leading=11, textColor=TEAL,
    fontName="Helvetica-Bold", leftIndent=6, spaceAfter=2)

HIGHLIGHT_STYLE = S("Highlight",
    fontSize=8.5, leading=11.5, textColor=CRIMSON,
    fontName="Helvetica-Bold")

TABLE_HDR = S("TableHdr",
    fontSize=8, leading=10, textColor=WHITE,
    fontName="Helvetica-Bold", alignment=TA_CENTER)

TABLE_CELL = S("TableCell",
    fontSize=7.8, leading=10, textColor=colors.black,
    fontName="Helvetica")

TABLE_CELL_BOLD = S("TableCellBold",
    fontSize=7.8, leading=10, textColor=NAVY,
    fontName="Helvetica-Bold")

TABLE_CELL_RED = S("TableCellRed",
    fontSize=7.8, leading=10, textColor=CRIMSON,
    fontName="Helvetica-Bold", alignment=TA_CENTER)

# ── Helpers ──────────────────────────────────────────────────────────────────

def section_header(title, bg=NAVY):
    data = [[Paragraph(f"  {title}", SECTION_STYLE)]]
    t = Table(data, colWidths=[186*mm])
    t.setStyle(TableStyle([
        ("BACKGROUND", (0,0), (-1,-1), bg),
        ("ROWPADDING", (0,0), (-1,-1), 4),
        ("BOX", (0,0), (-1,-1), 0.5, GOLD),
    ]))
    return t

def mini_header(title, bg=MIDBLUE):
    data = [[Paragraph(f"  {title}", S("mh", parent=SECTION_STYLE, fontSize=9, leading=12))]]
    t = Table(data, colWidths=[186*mm])
    t.setStyle(TableStyle([
        ("BACKGROUND", (0,0), (-1,-1), bg),
        ("ROWPADDING", (0,0), (-1,-1), 3),
        ("BOX", (0,0), (-1,-1), 0.3, GOLD),
    ]))
    return t

def make_table(headers, rows, col_widths, row_colors=None, stripe=True):
    hdr_row = [Paragraph(h, TABLE_HDR) for h in headers]
    data = [hdr_row]
    for i, row in enumerate(rows):
        styled = []
        for j, cell in enumerate(row):
            if isinstance(cell, tuple):
                styled.append(Paragraph(cell[0], cell[1]))
            else:
                styled.append(Paragraph(str(cell), TABLE_CELL))
        data.append(styled)

    t = Table(data, colWidths=col_widths, repeatRows=1)
    base_style = [
        ("BACKGROUND", (0,0), (-1,0), NAVY),
        ("GRID", (0,0), (-1,-1), 0.3, colors.HexColor("#CCCCCC")),
        ("ROWPADDING", (0,0), (-1,-1), 3),
        ("VALIGN", (0,0), (-1,-1), "MIDDLE"),
    ]
    if stripe:
        for i in range(1, len(data)):
            bg = LTBLUE if i % 2 == 0 else WHITE
            base_style.append(("BACKGROUND", (0,i), (-1,i), bg))
    t.setStyle(TableStyle(base_style))
    return t

def hr():
    return HRFlowable(width="100%", thickness=0.5, color=GOLD, spaceAfter=3, spaceBefore=3)

# ─────────────────────────────────────────────────────────────────────────────
# PAGE 1 BUILD
# ─────────────────────────────────────────────────────────────────────────────
story = []

# ── Cover banner ─────────────────────────────────────────────────────────────
banner_data = [[
    Paragraph("FORENSIC MEDICINE", TITLE_STYLE),
    Paragraph("QUICK REFERENCE CHEAT SHEET", TITLE_STYLE),
]]
banner = Table([[Paragraph("FORENSIC MEDICINE  |  QUICK REFERENCE CHEAT SHEET", TITLE_STYLE)]],
               colWidths=[186*mm])
banner.setStyle(TableStyle([
    ("BACKGROUND", (0,0), (-1,-1), NAVY),
    ("ROWPADDING", (0,0), (-1,-1), 10),
    ("BOX", (0,0), (-1,-1), 1.5, GOLD),
]))
story.append(banner)
story.append(Paragraph(
    "Ossification Centres for Age Estimation  •  Foetal Development Milestones  •  Medicolegal Definitions",
    SUBTITLE_STYLE))
story.append(Spacer(1, 4*mm))

# ═══════════════════════════════════════════════════════════════════════════
# SECTION 1 – HAASE'S RULE
# ═══════════════════════════════════════════════════════════════════════════
story.append(section_header("1.  HAASE'S RULE  —  Crown-to-Heel Length Estimation"))
story.append(Spacer(1, 2*mm))
story.append(Paragraph(
    "For the first 5 months: <b>Length (cm) = Month²</b>  |  "
    "For months 5–10: <b>Length (cm) = Month × 5</b>",
    BODY_STYLE))
story.append(Spacer(1,1*mm))

haase_headers = ["Month", "Length (cm)", "Weight (approx)", "Key Feature"]
haase_rows = [
    ["1", "1", "—", "Embryo; heart begins to beat"],
    ["2", "4", "—", "Limb buds; all organs forming"],
    ["3", "9", "~45 g", "Ossification begins; sex determinable"],
    ["4", "16", "~110 g", "Quickening felt; scalp hair"],
    ["5 ★", "25", "~340 g", "Vernix caseosa; lanugo; eyebrows"],
    ["6", "30", "~600 g", "Eyelids fused; limit of viability"],
    ["7 ★", "35", "~1200 g", "Eyes open; Béclard's centre (lower femur)"],
    ["8", "40", "~1800 g", "Testes begin descent (male)"],
    ["9 ★", "45", "~2400 g", "Poland's centre (upper tibia); nails reach tips"],
    ["10 (Term)", "50", "~3200 g", "Ear cartilage firm; sole creases; term"],
]
haase_widths = [18*mm, 28*mm, 36*mm, 104*mm]
story.append(make_table(haase_headers, haase_rows, haase_widths))
story.append(Paragraph("★ = critical medicolegal age points", NOTE_STYLE))
story.append(Spacer(1, 3*mm))

# ═══════════════════════════════════════════════════════════════════════════
# SECTION 2 – OSSIFICATION CENTRES TABLE
# ═══════════════════════════════════════════════════════════════════════════
story.append(section_header("2.  OSSIFICATION CENTRES  —  Medicolegal Significance", bg=CRIMSON))
story.append(Spacer(1, 2*mm))

osc_headers = ["Centre", "Location", "Age Appears", "Size at Term", "Medicolegal Significance"]
osc_rows = [
    [
        ("BÉCLARD'S POINT ★★★", TABLE_CELL_RED),
        "Lower femoral epiphysis",
        "36 weeks (9th month)",
        "5–6 mm",
        "Proves ≥36 weeks gestation; legal viability established; survives putrefaction"
    ],
    [
        ("POLAND'S POINT ★★", TABLE_CELL_RED),
        "Upper tibial epiphysis",
        "38–40 weeks (10th month)",
        "3–4 mm",
        "Confirms near-term / full-term; used with Béclard's for corroboration"
    ],
    ["Calcaneus", "Heel bone", "5th–6th foetal month", "Present at birth", "Confirms >24 weeks; seen on X-ray in foetal remains"],
    ["Talus", "Ankle bone", "7th–8th foetal month", "Present at birth", "Part of maturity assessment"],
    ["Cuboid", "Lateral mid-foot", "Near term (38–40 wks)", "Small at birth", "Confirms term birth"],
    ["Head of humerus", "Proximal humerus", "1st postnatal year (3–6 mo)", "—", "Postnatal age estimation"],
    ["Capitulum of humerus", "Lateral condyle", "1–2 years postnatal", "—", "Child age estimation in abuse cases"],
    ["Femoral head", "Proximal femur", "4–6 months postnatal", "—", "Postnatal age / neglect / AVN"],
    ["Iliac crest", "Pelvis", "Adolescence (~15 yrs)", "—", "Age estimation 15–23 yrs"],
    ["Medial clavicle epiphysis", "Sternoclavicular joint", "18–20 years", "Fused by 25–30 yrs", "Age 18–30 estimation; most reliable adult marker"],
]
osc_widths = [38*mm, 32*mm, 28*mm, 20*mm, 68*mm]
story.append(make_table(osc_headers, osc_rows, osc_widths))
story.append(Paragraph(
    "★★★ BÉCLARD'S POINT is the single most important ossification centre in forensic practice.",
    MNEMONIC_STYLE))
story.append(Spacer(1, 2*mm))

# ═══════════════════════════════════════════════════════════════════════════
# SECTION 3 – EXTERNAL MATURITY SIGNS
# ═══════════════════════════════════════════════════════════════════════════
story.append(section_header("3.  EXTERNAL SIGNS OF FOETAL MATURITY"))
story.append(Spacer(1, 2*mm))

ext_headers = ["Feature", "Preterm (<36 wks)", "Term (≥38 wks)", "Medicolegal Note"]
ext_rows = [
    ["Ear cartilage", "Soft, folds easily, stays folded", "Firm, springs back instantly", "Key maturity marker at autopsy"],
    ["Sole creases", "Absent or only anterior creases", "Deep creases covering entire sole", "Score-based maturity grading"],
    ["Lanugo hair", "Abundant over body", "Only on shoulders/back", "Shed by 36–38 weeks"],
    ["Vernix caseosa", "Thick coating", "Minimal or absent", "Protective, shed near term"],
    ["Nails", "Soft, do not reach fingertips", "Reach or exceed fingertips", "Maturity + overdue if beyond tips"],
    ["Breast nodule", "<5 mm or absent", "≥7 mm diameter", "Ballard/New Ballard score"],
    ["Genitalia (M)", "Testes undescended; empty scrotum", "Testes in scrotum; rugae present", "Testes descend ~36 wks"],
    ["Genitalia (F)", "Labia minora prominent", "Labia majora cover minora completely", "Fat deposition in majora at term"],
    ["Skin", "Thin, gelatinous, transparent", "Thick, opaque, peeling", "Premature = thin, veins visible"],
    ["Eyelids", "Fused shut <26 wks", "Open by 26–28 wks", "Fused = severe prematurity"],
]
ext_widths = [28*mm, 42*mm, 42*mm, 74*mm]
story.append(make_table(ext_headers, ext_rows, ext_widths))
story.append(Spacer(1, 3*mm))

story.append(PageBreak())

# ═══════════════════════════════════════════════════════════════════════════
# SECTION 4 – MEDICOLEGAL DEFINITIONS
# ═══════════════════════════════════════════════════════════════════════════
story.append(section_header("4.  ESSENTIAL MEDICOLEGAL DEFINITIONS"))
story.append(Spacer(1, 2*mm))

definitions = [
    ("VIABILITY",
     "Capacity of a foetus to survive independently after delivery. "
     "India (MTP Act): 20 weeks (24 wks for special categories under 2021 Amendment). "
     "UK: 24 weeks. WHO: 22–24 weeks. Legal (India courts): 28 weeks / ≥1000 g."),
    ("LIVE BIRTH (WHO)",
     "Complete expulsion/extraction from mother of a product of conception that, AFTER separation, "
     "breathes OR shows any other evidence of life (heartbeat, pulsation of cord, voluntary muscle movement), "
     "regardless of gestational age."),
    ("STILLBIRTH",
     "Birth after 28 completed weeks of gestation of a baby that shows NO sign of life (no breathing, "
     "no heartbeat, no voluntary movement). Must be registered. No birth certificate issued (India). "
     "Macerated stillbirth = intrauterine death; Fresh stillbirth = intrapartum death."),
    ("INFANTICIDE",
     "Unlawful killing of a newborn infant by wilful act or omission. Under Infanticide Act (UK): "
     "mother who kills her child within 12 months of birth while balance of mind disturbed by effects "
     "of birth/lactation is guilty of infanticide (not murder). India: Sections 302/304 IPC apply."),
    ("CONCEALMENT OF BIRTH",
     "Disposal of the body of a child after birth to conceal the fact of its birth, whether the child "
     "was born alive or dead. India: Section 318 IPC (now Section 319 BNS 2023). Punishable by up to "
     "2 years imprisonment ± fine. No need to prove child was born alive."),
    ("FOETICIDE",
     "Willful destruction of a foetus in the uterus. Includes criminal abortion. "
     "India: Punishable under Section 312 IPC (illegal abortion) with up to 7 years imprisonment."),
    ("ABORTION",
     "Expulsion of products of conception before viability (before 20–28 weeks depending on jurisdiction). "
     "Spontaneous = miscarriage. Induced = may be legal (MTP Act) or illegal (criminal). "
     "MTP Act 1971 (amended 2021): Legal abortion up to 20 weeks (routine), up to 24 weeks (special categories)."),
    ("LEGITIMACY",
     "A child is legitimate if born within a valid marriage or within 280 days after dissolution of marriage "
     "(presumption). Minimum gestation 210 days (7 months). Maximum accepted by courts: 280–300 days (some "
     "courts accepted up to 349 days). DNA testing now definitive."),
    ("GESTATIONAL AGE",
     "Duration of pregnancy calculated from the FIRST DAY of the last menstrual period (LMP). "
     "Normal = 280 days (40 weeks) from LMP or 266 days from ovulation/fertilisation. "
     "Established by: USG, fundal height, foetal parameters, ossification centres at autopsy."),
    ("HYDROSTATIC TEST (Docimasia Pulmonum)",
     "Medicolegal test for live birth. Principle: foetal lungs are atelectatic (density >1, SINK). "
     "After breathing, air expands alveoli (density <1, FLOAT). "
     "Positive (floats) = baby breathed after birth. "
     "Limitations: putrefaction causes false +ve; CPR/resuscitation causes false +ve; forcible compression causes false -ve."),
    ("BIRTH ASPHYXIA",
     "Failure to establish adequate respiration at birth due to insufficient oxygen (hypoxia) and/or "
     "accumulation of CO2 (hypercapnia) and lactic acid. Causes: cord prolapse, placental abruption, "
     "obstructed labour, meconium aspiration. Leads to HIE. Medicolegal: major cause of medical negligence claims."),
    ("MACERATION",
     "Post-mortem autolysis of a stillborn foetus retained in utero after intrauterine death. "
     "Features: skin slippage, discolouration (reddish-brown), softening of tissues, overlapping skull bones. "
     "Takes 12–24 hours to begin; full maceration in 3–5 days. Confirms intrauterine death."),
    ("MUMMIFICATION (FOETAL)",
     "Drying and shrinkage of a foetus retained in utero for prolonged period. "
     "Seen in lithopedion (calcified ectopic foetus, years to decades). "
     "Forensic importance: establishes retained dead foetus vs. recent delivery."),
    ("CAPUT SUCCEDANEUM",
     "Diffuse oedematous swelling of the scalp crossing suture lines, formed during labour due to "
     "pressure of the presenting part. Present at birth, resolves in 1–2 days. "
     "Distinguish from cephalhaematoma (subperiosteal, does NOT cross sutures, blood takes weeks to resolve)."),
    ("BIRTH INJURY",
     "Physical injury sustained by neonate during labour and delivery. Includes: cephalhaematoma, "
     "intracranial haemorrhage, clavicular fracture (most common), brachial plexus injury (Erb's palsy), "
     "facial nerve palsy. Medicolegal: relevant in obstetric negligence claims."),
    ("TARDIEU'S SPOTS",
     "Petechial haemorrhages on visceral pleura, epicardium, and thymic surface due to increased venous "
     "pressure during asphyxia. Classic sign of asphyxial death. Also seen in birth asphyxia. "
     "Must be distinguished from post-mortem hypostasis."),
    ("UMBILICAL CORD — FORENSIC",
     "Normal cord: 50–55 cm long, 2 arteries + 1 vein (AVA). "
     "Single umbilical artery: associated with renal agenesis, trisomy 18. "
     "True knot: may cause foetal death. "
     "Cord around neck (nuchal cord): present in 20–30% deliveries, usually harmless. "
     "Fresh cut/torn cord with live birth features: infanticide suspected."),
    ("MTP ACT 1971 (AMENDED 2021)",
     "Medical Termination of Pregnancy Act (India). "
     "Up to 20 weeks: one registered medical practitioner's opinion. "
     "20–24 weeks: two practitioners required; only for special categories (rape, incest, foetal abnormality, disability). "
     "Beyond 24 weeks: only for substantial foetal abnormality — requires Medical Board approval. "
     "Violation: criminal abortion (Section 312–316 IPC)."),
]

def_widths = [42*mm, 144*mm]
def_data = [[Paragraph("TERM", TABLE_HDR), Paragraph("DEFINITION", TABLE_HDR)]]
for i, (term, defn) in enumerate(definitions):
    bg = LTGOLD if i % 2 == 0 else WHITE
    def_data.append([
        Paragraph(term, TABLE_CELL_BOLD),
        Paragraph(defn, TABLE_CELL)
    ])
def_table = Table(def_data, colWidths=def_widths, repeatRows=1)
def_table.setStyle(TableStyle([
    ("BACKGROUND", (0,0), (-1,0), NAVY),
    ("GRID", (0,0), (-1,-1), 0.3, colors.HexColor("#CCCCCC")),
    ("ROWPADDING", (0,0), (-1,-1), 4),
    ("VALIGN", (0,0), (-1,-1), "TOP"),
    *[("BACKGROUND", (0, i+1), (-1, i+1), LTGOLD if i % 2 == 0 else WHITE)
      for i in range(len(definitions))]
]))
story.append(def_table)
story.append(Spacer(1, 4*mm))

# ═══════════════════════════════════════════════════════════════════════════
# SECTION 5 – KEY MNEMONICS
# ═══════════════════════════════════════════════════════════════════════════
story.append(section_header("5.  MNEMONICS & QUICK RECALL", bg=TEAL))
story.append(Spacer(1, 2*mm))

mnem_headers = ["Mnemonic", "What it covers"]
mnem_rows = [
    ['"Béclard Proves Birth" (BPB)', "Béclard = Proves ≥8 months; Poland = near-Birth (10th month)"],
    ['"AVA in the cord"', "2 Arteries, 1 Vein, Arteries (single umbilical artery = renal agenesis risk)"],
    ['"FAVE" shunts', "Foramen ovale, Arteriosus ductus, Venosus ductus = three foetal bypasses"],
    ['"DV → LV → RA → FO → LA" for oxygenated blood', "Ductus Venosus → IVC → Right Atrium → Foramen Ovale → Left Atrium → Systemic"],
    ['Haase rule: "Square then Times 5"', "Months 1–5: month², Months 5–10: month × 5 (crown-heel in cm)"],
    ['"SWIM test" (Hydrostatic test)', "Lungs Swim = baby breathed (live birth); Lungs Sink = stillborn/did not breathe"],
    ['"Ear springs back at 36"', "Firm ear cartilage that springs back = ≥36 weeks gestation"],
    ['"210 to 300" gestation window', "Min viability 210 days; normal 280 days; max accepted ~300 days (legitimacy)"],
    ['"MTP 20-24 Rule"', "Routine abortion ≤20 wks; special categories up to 24 wks (MTP Amendment 2021)"],
    ['"CAPS" for external maturity', "Creases (sole), Areola, Posture/lanugo, Skin texture = Ballard score components"],
]
mnem_widths = [58*mm, 128*mm]
story.append(make_table(mnem_headers, mnem_rows, mnem_widths))
story.append(Spacer(1, 3*mm))

# ═══════════════════════════════════════════════════════════════════════════
# SECTION 6 – ADULT AGE ESTIMATION FROM BONE
# ═══════════════════════════════════════════════════════════════════════════
story.append(section_header("6.  ADULT AGE ESTIMATION — KEY SKELETAL MARKERS", bg=colors.HexColor("#4A148C")))
story.append(Spacer(1, 2*mm))

adult_headers = ["Age Range", "Skeletal Marker", "Description"]
adult_rows = [
    ["15–17 yrs", "Iliac crest epiphysis appears", "Ring apophysis begins ossification"],
    ["18–20 yrs", "Medial clavicle epiphysis appears", "Most reliable marker for 18+ yrs"],
    ["20–23 yrs", "Vertebral ring apophysis fuses", "Last vertebral fusion"],
    ["25–30 yrs", "Medial clavicle fuses completely", "Fusion = >25 yrs; most reliable upper limit"],
    ["25–35 yrs", "Skull sutures begin closing", "Coronal and sagittal first; unreliable alone"],
    ["30–45 yrs", "Pubic symphysis changes", "Todd / Suchey-Brooks phases 1–6"],
    ["35–50 yrs", "Sternal end 4th rib changes", "İşcan method for rib metamorphosis"],
    [">40 yrs", "Osteoarthritis changes appear", "Lipping, eburnation, narrowing joint spaces"],
    [">50 yrs", "Osteoporosis, trabecular loss", "Cortical thinning; DEXA relevant"],
    ["Any age", "Dental eruption & wear", "Third molar: >17 yrs; wear pattern for 30+ yrs"],
]
adult_widths = [22*mm, 58*mm, 106*mm]
story.append(make_table(adult_headers, adult_rows, adult_widths))
story.append(Spacer(1, 3*mm))

# ═══════════════════════════════════════════════════════════════════════════
# SECTION 7 – FOETAL CIRCULATION QUICK REF
# ═══════════════════════════════════════════════════════════════════════════
story.append(section_header("7.  FOETAL CIRCULATION — SHUNTS & CLOSURE TIMELINE", bg=CRIMSON))
story.append(Spacer(1, 2*mm))

shunt_headers = ["Shunt", "Connects", "Function", "Functional Closure", "Adult Remnant"]
shunt_rows = [
    ["Ductus venosus", "Umbilical vein → IVC", "Bypasses liver; delivers O₂-rich blood to heart", "Within hours of birth (sphincter)", "Ligamentum venosum"],
    ["Foramen ovale", "Right atrium → Left atrium", "Bypasses lungs; shunts O₂-rich IVC blood to systemic", "At first breath (L>R atrial pressure)", "Fossa ovalis"],
    ["Ductus arteriosus", "Pulmonary trunk → Descending aorta", "Bypasses lungs; right ventricular output to aorta", "20% by 24h; 80% by 48h; 100% by 96h", "Ligamentum arteriosum"],
    ["Umbilical vein", "Placenta → foetal liver/IVC", "Carries oxygenated blood from placenta", "Within minutes of birth", "Ligamentum teres hepatis"],
    ["Umbilical arteries (×2)", "Foetal iliac arteries → placenta", "Return deoxygenated blood to placenta", "Immediately on cord clamping", "Medial umbilical ligaments"],
]
shunt_widths = [28*mm, 36*mm, 46*mm, 36*mm, 40*mm]
story.append(make_table(shunt_headers, shunt_rows, shunt_widths))
story.append(Spacer(1, 3*mm))

# ═══════════════════════════════════════════════════════════════════════════
# SECTION 8 – IMPORTANT LEGAL PROVISIONS
# ═══════════════════════════════════════════════════════════════════════════
story.append(section_header("8.  KEY LEGAL PROVISIONS — INDIA", bg=colors.HexColor("#1B5E20")))
story.append(Spacer(1, 2*mm))

legal_headers = ["Section", "Act", "Offence / Subject", "Punishment"]
legal_rows = [
    ["312 IPC / 88 BNS", "IPC 1860 / BNS 2023", "Causing miscarriage (criminal abortion)", "Up to 3 yrs; up to 7 yrs if woman objects"],
    ["313 IPC / 89 BNS", "IPC 1860 / BNS 2023", "Causing miscarriage without woman's consent", "Life imprisonment or 10 yrs + fine"],
    ["314 IPC / 90 BNS", "IPC 1860 / BNS 2023", "Death caused by abortion attempt", "Up to 10 yrs + fine; life if without consent"],
    ["315 IPC / 91 BNS", "IPC 1860 / BNS 2023", "Act to prevent child being born alive / causing post-birth death", "Up to 10 yrs + fine"],
    ["316 IPC / 92 BNS", "IPC 1860 / BNS 2023", "Causing death of quick unborn child (culpable homicide)", "Up to 10 yrs + fine"],
    ["318 IPC / 94 BNS", "IPC 1860 / BNS 2023", "Concealment of birth by disposal of body", "Up to 2 yrs + fine"],
    ["302 IPC / 101 BNS", "IPC 1860 / BNS 2023", "Infanticide (murder)", "Death or life imprisonment"],
    ["MTP Act 1971 (Amended 2021)", "Central Act", "Legal termination of pregnancy", "Legal: ≤20 wks; ≤24 wks (special); >24 wks Board only"],
    ["PCPNDT Act 1994", "Central Act", "Prohibition of sex determination of foetus", "Up to 3 yrs + fine; 5 yrs repeat offence"],
    ["Registration of Births & Deaths Act 1969", "Central Act", "Registration of stillbirths and live births", "Mandatory; stillbirth ≥28 wks must be registered"],
]
legal_widths = [32*mm, 30*mm, 72*mm, 52*mm]
story.append(make_table(legal_headers, legal_rows, legal_widths))
story.append(Spacer(1, 3*mm))

# ── Footer note ──────────────────────────────────────────────────────────────
hr()
story.append(hr())
story.append(Paragraph(
    "References: Moore – The Developing Human (Clinically Oriented Embryology) | "
    "Parikh's Textbook of Medical Jurisprudence, Forensic Medicine & Toxicology | "
    "Reddy's Essentials of Forensic Medicine & Toxicology | MTP Act 1971 (Amended 2021) | IPC / BNS 2023",
    NOTE_STYLE))
story.append(Paragraph(
    "Prepared as exam quick reference only. Always verify against current legislation and standard references.",
    NOTE_STYLE))

# ── Build ─────────────────────────────────────────────────────────────────────
doc.build(story)
print(f"PDF generated: {OUTPUT}")