diff --git a/src/utils/invoiceTemplates.ts b/src/utils/invoiceTemplates.ts
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+export interface InvoiceTemplateColors {
+  primary: string
+  secondary: string
+  background: string
+  headerBg: string
+  headerText: string
+  bodyText: string
+  tableHeaderBg: string
+  tableHeaderText: string
+  tableRowAlt: string
+  tableBorder: string
+  totalHighlight: string
+}
+
+export interface InvoiceTemplateLayout {
+  logoPosition: 'top-left' | 'top-center' | 'top-right'
+  headerStyle: 'full-width' | 'split' | 'minimal' | 'sidebar' | 'gradient' | 'geometric' | 'centered'
+  tableStyle: 'bordered' | 'striped' | 'borderless' | 'minimal-lines' | 'colored-sections'
+  totalsPosition: 'right' | 'center'
+  showDividers: boolean
+  dividerStyle: 'thin' | 'double' | 'thick' | 'none'
+}
+
+export interface InvoiceTemplateTypography {
+  titleSize: number
+  titleWeight: 'bold' | 'normal'
+  headerSize: number
+  bodySize: number
+  numberStyle: 'normal' | 'monospace-feel'
+}
+
+export interface InvoiceTemplateDecorative {
+  cornerShape: 'none' | 'colored-block' | 'triangle' | 'diagonal'
+  sidebarWidth: number
+  sidebarColor: string
+  useGradientHeader: boolean
+  gradientFrom?: string
+  gradientTo?: string
+  backgroundTint: boolean
+  backgroundTintColor?: string
+}
+
+export interface InvoiceTemplateConfig {
+  id: string
+  name: string
+  category: 'essential' | 'creative' | 'warm' | 'premium'
+  description: string
+  colors: InvoiceTemplateColors
+  layout: InvoiceTemplateLayout
+  typography: InvoiceTemplateTypography
+  decorative: InvoiceTemplateDecorative
+}
+
+// --- Template definitions ---
+// Define all 15 templates. Each has unique colors, layout, typography, decorative.
+
+const cleanMinimal: InvoiceTemplateConfig = {
+  id: 'clean-minimal',
+  name: 'Clean Minimal',
+  category: 'essential',
+  description: 'Swiss-inspired simplicity with a single accent line',
+  colors: {
+    primary: '#3B82F6',
+    secondary: '#93C5FD',
+    background: '#FFFFFF',
+    headerBg: '#FFFFFF',
+    headerText: '#111827',
+    bodyText: '#374151',
+    tableHeaderBg: '#F9FAFB',
+    tableHeaderText: '#374151',
+    tableRowAlt: '#F9FAFB',
+    tableBorder: '#E5E7EB',
+    totalHighlight: '#3B82F6',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'minimal',
+    tableStyle: 'bordered',
+    totalsPosition: 'right',
+    showDividers: true,
+    dividerStyle: 'thin',
+  },
+  typography: { titleSize: 24, titleWeight: 'bold', headerSize: 11, bodySize: 9, numberStyle: 'normal' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+const corporateClassic: InvoiceTemplateConfig = {
+  id: 'corporate-classic',
+  name: 'Corporate Classic',
+  category: 'essential',
+  description: 'Navy header band with professional table layout',
+  colors: {
+    primary: '#1E3A5F',
+    secondary: '#2563EB',
+    background: '#FFFFFF',
+    headerBg: '#1E3A5F',
+    headerText: '#FFFFFF',
+    bodyText: '#374151',
+    tableHeaderBg: '#1E3A5F',
+    tableHeaderText: '#FFFFFF',
+    tableRowAlt: '#F3F4F6',
+    tableBorder: '#D1D5DB',
+    totalHighlight: '#1E3A5F',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'full-width',
+    tableStyle: 'striped',
+    totalsPosition: 'right',
+    showDividers: false,
+    dividerStyle: 'none',
+  },
+  typography: { titleSize: 28, titleWeight: 'bold', headerSize: 11, bodySize: 9, numberStyle: 'normal' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+const modernBold: InvoiceTemplateConfig = {
+  id: 'modern-bold',
+  name: 'Modern Bold',
+  category: 'essential',
+  description: 'Large accent block with oversized typography',
+  colors: {
+    primary: '#6366F1',
+    secondary: '#A5B4FC',
+    background: '#FFFFFF',
+    headerBg: '#6366F1',
+    headerText: '#FFFFFF',
+    bodyText: '#1F2937',
+    tableHeaderBg: '#6366F1',
+    tableHeaderText: '#FFFFFF',
+    tableRowAlt: '#F5F3FF',
+    tableBorder: '#E0E7FF',
+    totalHighlight: '#6366F1',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'full-width',
+    tableStyle: 'borderless',
+    totalsPosition: 'right',
+    showDividers: false,
+    dividerStyle: 'none',
+  },
+  typography: { titleSize: 32, titleWeight: 'bold', headerSize: 12, bodySize: 10, numberStyle: 'normal' },
+  decorative: { cornerShape: 'colored-block', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+const elegantSerif: InvoiceTemplateConfig = {
+  id: 'elegant-serif',
+  name: 'Elegant Serif',
+  category: 'essential',
+  description: 'Refined charcoal and gold with centered layout',
+  colors: {
+    primary: '#374151',
+    secondary: '#B8860B',
+    background: '#FFFFFF',
+    headerBg: '#FFFFFF',
+    headerText: '#374151',
+    bodyText: '#4B5563',
+    tableHeaderBg: '#374151',
+    tableHeaderText: '#FFFFFF',
+    tableRowAlt: '#FAFAFA',
+    tableBorder: '#D1D5DB',
+    totalHighlight: '#B8860B',
+  },
+  layout: {
+    logoPosition: 'top-center',
+    headerStyle: 'centered',
+    tableStyle: 'minimal-lines',
+    totalsPosition: 'right',
+    showDividers: true,
+    dividerStyle: 'double',
+  },
+  typography: { titleSize: 26, titleWeight: 'normal', headerSize: 11, bodySize: 9, numberStyle: 'normal' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+const simpleTwoTone: InvoiceTemplateConfig = {
+  id: 'simple-two-tone',
+  name: 'Simple Two-Tone',
+  category: 'essential',
+  description: 'Dark/light split header with emerald accents',
+  colors: {
+    primary: '#1F2937',
+    secondary: '#10B981',
+    background: '#FFFFFF',
+    headerBg: '#1F2937',
+    headerText: '#FFFFFF',
+    bodyText: '#374151',
+    tableHeaderBg: '#F3F4F6',
+    tableHeaderText: '#1F2937',
+    tableRowAlt: '#FFFFFF',
+    tableBorder: '#E5E7EB',
+    totalHighlight: '#10B981',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'split',
+    tableStyle: 'minimal-lines',
+    totalsPosition: 'right',
+    showDividers: true,
+    dividerStyle: 'thin',
+  },
+  typography: { titleSize: 24, titleWeight: 'bold', headerSize: 11, bodySize: 9, numberStyle: 'normal' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+const gradientHeader: InvoiceTemplateConfig = {
+  id: 'gradient-header',
+  name: 'Gradient Header',
+  category: 'creative',
+  description: 'Full-width gradient header with modern feel',
+  colors: {
+    primary: '#667EEA',
+    secondary: '#764BA2',
+    background: '#FFFFFF',
+    headerBg: '#667EEA',
+    headerText: '#FFFFFF',
+    bodyText: '#374151',
+    tableHeaderBg: '#667EEA',
+    tableHeaderText: '#FFFFFF',
+    tableRowAlt: '#F5F3FF',
+    tableBorder: '#E0E7FF',
+    totalHighlight: '#667EEA',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'gradient',
+    tableStyle: 'striped',
+    totalsPosition: 'right',
+    showDividers: false,
+    dividerStyle: 'none',
+  },
+  typography: { titleSize: 28, titleWeight: 'bold', headerSize: 11, bodySize: 9, numberStyle: 'normal' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: true, gradientFrom: '#667EEA', gradientTo: '#764BA2', backgroundTint: false },
+}
+
+const sidebarAccent: InvoiceTemplateConfig = {
+  id: 'sidebar-accent',
+  name: 'Sidebar Accent',
+  category: 'creative',
+  description: 'Rose vertical bar with asymmetric layout',
+  colors: {
+    primary: '#E11D48',
+    secondary: '#FB7185',
+    background: '#FFFFFF',
+    headerBg: '#FFFFFF',
+    headerText: '#111827',
+    bodyText: '#374151',
+    tableHeaderBg: '#FFF1F2',
+    tableHeaderText: '#E11D48',
+    tableRowAlt: '#FFF1F2',
+    tableBorder: '#FECDD3',
+    totalHighlight: '#E11D48',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'sidebar',
+    tableStyle: 'borderless',
+    totalsPosition: 'right',
+    showDividers: true,
+    dividerStyle: 'thin',
+  },
+  typography: { titleSize: 24, titleWeight: 'bold', headerSize: 11, bodySize: 9, numberStyle: 'normal' },
+  decorative: { cornerShape: 'none', sidebarWidth: 4, sidebarColor: '#E11D48', useGradientHeader: false, backgroundTint: false },
+}
+
+const geometricModern: InvoiceTemplateConfig = {
+  id: 'geometric-modern',
+  name: 'Geometric Modern',
+  category: 'creative',
+  description: 'Violet triangle accent with diagonal elements',
+  colors: {
+    primary: '#8B5CF6',
+    secondary: '#C4B5FD',
+    background: '#FFFFFF',
+    headerBg: '#FFFFFF',
+    headerText: '#1F2937',
+    bodyText: '#374151',
+    tableHeaderBg: '#8B5CF6',
+    tableHeaderText: '#FFFFFF',
+    tableRowAlt: '#F5F3FF',
+    tableBorder: '#DDD6FE',
+    totalHighlight: '#8B5CF6',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'geometric',
+    tableStyle: 'striped',
+    totalsPosition: 'right',
+    showDividers: false,
+    dividerStyle: 'none',
+  },
+  typography: { titleSize: 26, titleWeight: 'bold', headerSize: 11, bodySize: 9, numberStyle: 'normal' },
+  decorative: { cornerShape: 'triangle', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+const darkMode: InvoiceTemplateConfig = {
+  id: 'dark-mode',
+  name: 'Dark Mode',
+  category: 'creative',
+  description: 'Near-black background with cyan highlights',
+  colors: {
+    primary: '#06B6D4',
+    secondary: '#22D3EE',
+    background: '#1A1A2E',
+    headerBg: '#1A1A2E',
+    headerText: '#E2E8F0',
+    bodyText: '#CBD5E1',
+    tableHeaderBg: '#0F172A',
+    tableHeaderText: '#06B6D4',
+    tableRowAlt: '#16213E',
+    tableBorder: '#334155',
+    totalHighlight: '#06B6D4',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'minimal',
+    tableStyle: 'striped',
+    totalsPosition: 'right',
+    showDividers: true,
+    dividerStyle: 'thin',
+  },
+  typography: { titleSize: 26, titleWeight: 'bold', headerSize: 11, bodySize: 9, numberStyle: 'monospace-feel' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+const warmNatural: InvoiceTemplateConfig = {
+  id: 'warm-natural',
+  name: 'Warm Natural',
+  category: 'warm',
+  description: 'Earth tones on warm beige background',
+  colors: {
+    primary: '#C2703E',
+    secondary: '#6B7A3D',
+    background: '#FDF6EC',
+    headerBg: '#FDF6EC',
+    headerText: '#78350F',
+    bodyText: '#57534E',
+    tableHeaderBg: '#C2703E',
+    tableHeaderText: '#FFFFFF',
+    tableRowAlt: '#FEF3C7',
+    tableBorder: '#D6D3D1',
+    totalHighlight: '#C2703E',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'minimal',
+    tableStyle: 'striped',
+    totalsPosition: 'right',
+    showDividers: true,
+    dividerStyle: 'thin',
+  },
+  typography: { titleSize: 26, titleWeight: 'bold', headerSize: 11, bodySize: 9, numberStyle: 'normal' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: true, backgroundTintColor: '#FDF6EC' },
+}
+
+const playfulColorBlock: InvoiceTemplateConfig = {
+  id: 'playful-color-block',
+  name: 'Playful Color Block',
+  category: 'warm',
+  description: 'Teal and coral blocks for a fun professional feel',
+  colors: {
+    primary: '#0D9488',
+    secondary: '#F97316',
+    background: '#FFFFFF',
+    headerBg: '#0D9488',
+    headerText: '#FFFFFF',
+    bodyText: '#1F2937',
+    tableHeaderBg: '#F97316',
+    tableHeaderText: '#FFFFFF',
+    tableRowAlt: '#FFF7ED',
+    tableBorder: '#FDBA74',
+    totalHighlight: '#0D9488',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'full-width',
+    tableStyle: 'colored-sections',
+    totalsPosition: 'right',
+    showDividers: false,
+    dividerStyle: 'none',
+  },
+  typography: { titleSize: 28, titleWeight: 'bold', headerSize: 11, bodySize: 9, numberStyle: 'normal' },
+  decorative: { cornerShape: 'colored-block', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+const retroProfessional: InvoiceTemplateConfig = {
+  id: 'retro-professional',
+  name: 'Retro Professional',
+  category: 'warm',
+  description: 'Vintage double-rule lines with warm brown palette',
+  colors: {
+    primary: '#78350F',
+    secondary: '#92400E',
+    background: '#FFFBEB',
+    headerBg: '#FFFBEB',
+    headerText: '#78350F',
+    bodyText: '#57534E',
+    tableHeaderBg: '#78350F',
+    tableHeaderText: '#FFFFFF',
+    tableRowAlt: '#FEF3C7',
+    tableBorder: '#92400E',
+    totalHighlight: '#78350F',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'minimal',
+    tableStyle: 'bordered',
+    totalsPosition: 'right',
+    showDividers: true,
+    dividerStyle: 'double',
+  },
+  typography: { titleSize: 24, titleWeight: 'bold', headerSize: 11, bodySize: 9, numberStyle: 'normal' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: true, backgroundTintColor: '#FFFBEB' },
+}
+
+const techMinimal: InvoiceTemplateConfig = {
+  id: 'tech-minimal',
+  name: 'Tech Minimal',
+  category: 'premium',
+  description: 'Slate and electric green with code-editor aesthetic',
+  colors: {
+    primary: '#475569',
+    secondary: '#22C55E',
+    background: '#FFFFFF',
+    headerBg: '#FFFFFF',
+    headerText: '#0F172A',
+    bodyText: '#475569',
+    tableHeaderBg: '#0F172A',
+    tableHeaderText: '#22C55E',
+    tableRowAlt: '#F8FAFC',
+    tableBorder: '#E2E8F0',
+    totalHighlight: '#22C55E',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'minimal',
+    tableStyle: 'minimal-lines',
+    totalsPosition: 'right',
+    showDividers: true,
+    dividerStyle: 'thin',
+  },
+  typography: { titleSize: 22, titleWeight: 'bold', headerSize: 10, bodySize: 9, numberStyle: 'monospace-feel' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+const executivePremium: InvoiceTemplateConfig = {
+  id: 'executive-premium',
+  name: 'Executive Premium',
+  category: 'premium',
+  description: 'Black and gold luxury with generous spacing',
+  colors: {
+    primary: '#111827',
+    secondary: '#D4AF37',
+    background: '#FFFFFF',
+    headerBg: '#111827',
+    headerText: '#D4AF37',
+    bodyText: '#374151',
+    tableHeaderBg: '#111827',
+    tableHeaderText: '#D4AF37',
+    tableRowAlt: '#F9FAFB',
+    tableBorder: '#D1D5DB',
+    totalHighlight: '#D4AF37',
+  },
+  layout: {
+    logoPosition: 'top-left',
+    headerStyle: 'full-width',
+    tableStyle: 'minimal-lines',
+    totalsPosition: 'right',
+    showDividers: true,
+    dividerStyle: 'thin',
+  },
+  typography: { titleSize: 28, titleWeight: 'normal', headerSize: 11, bodySize: 10, numberStyle: 'normal' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+const dataDrivenClean: InvoiceTemplateConfig = {
+  id: 'data-driven-clean',
+  name: 'Data-Driven Clean',
+  category: 'premium',
+  description: 'Deep blue with emphasis on data hierarchy',
+  colors: {
+    primary: '#1E40AF',
+    secondary: '#3B82F6',
+    background: '#FFFFFF',
+    headerBg: '#1E40AF',
+    headerText: '#FFFFFF',
+    bodyText: '#1F2937',
+    tableHeaderBg: '#1E40AF',
+    tableHeaderText: '#FFFFFF',
+    tableRowAlt: '#EFF6FF',
+    tableBorder: '#BFDBFE',
+    totalHighlight: '#1E40AF',
+  },
+  layout: {
+    logoPosition: 'top-right',
+    headerStyle: 'full-width',
+    tableStyle: 'striped',
+    totalsPosition: 'center',
+    showDividers: false,
+    dividerStyle: 'none',
+  },
+  typography: { titleSize: 24, titleWeight: 'bold', headerSize: 12, bodySize: 10, numberStyle: 'monospace-feel' },
+  decorative: { cornerShape: 'none', sidebarWidth: 0, sidebarColor: '', useGradientHeader: false, backgroundTint: false },
+}
+
+// --- Registry ---
+export const INVOICE_TEMPLATES: InvoiceTemplateConfig[] = [
+  cleanMinimal,
+  corporateClassic,
+  modernBold,
+  elegantSerif,
+  simpleTwoTone,
+  gradientHeader,
+  sidebarAccent,
+  geometricModern,
+  darkMode,
+  warmNatural,
+  playfulColorBlock,
+  retroProfessional,
+  techMinimal,
+  executivePremium,
+  dataDrivenClean,
+]
+
+export const TEMPLATE_CATEGORIES = [
+  { id: 'essential', label: 'Professional Essentials' },
+  { id: 'creative', label: 'Creative & Modern' },
+  { id: 'warm', label: 'Warm & Distinctive' },
+  { id: 'premium', label: 'Premium & Specialized' },
+] as const
+
+export function getTemplateById(id: string): InvoiceTemplateConfig {
+  return INVOICE_TEMPLATES.find(t => t.id === id) || INVOICE_TEMPLATES[0]
+}
+
+export function getTemplatesByCategory(category: string): InvoiceTemplateConfig[] {
+  return INVOICE_TEMPLATES.filter(t => t.category === category)
+}