Product Type: Invoice & Billing Tool. Keywords: invoice, billing, payment, receipt, freelance, estimate, quote, accounting. Primary Style: Minimalism + Flat Design. Secondary Styles: Swiss Modernism 2.0, Accessible & Ethical. Landing Page Pattern: Conversion-Optimized + Trust. Dashboard Style: Financial Dashboard. Color Palette Focus: Professional navy + paid green + overdue red + neutral grey. Key Considerations: Invoice template with line items. Tax/discount calculation. Status badges (Draft/Sent/Paid/Overdue). PDF export + share. Payment link generation. Client address book. Recurring invoices..