Professional & Mobile-Friendly Proposal Template Design for Business Use

We are seeking a skilled designer to create a professional and modern proposal template for daily business use. This project focuses on design and layout stability, not complex spreadsheet functionality. The primary goal is to develop a clean, elegant, and easily editable template that maintains its layout integrity across various devices, including iPad, iPhone, and desktop/laptop computers. The template must allow for quick editing of proposal details without any formatting issues or layout breakage, especially on mobile devices.

Key elements to be included in the template are:
- A dedicated area for the company logo.
- A clean and modern aesthetic.
- Fields for client name, date, and proposal number.
- A clear section for service descriptions.
- An editable pricing/value field.
- Automated subtotal and total sections.
- A notes section for additional information.
- A field for project timeline.
- Professional formatting with easy-to-read fonts and a well-aligned structure.

Crucial requirements for this template include:
- Minimal editable fields to streamline the editing process.
- A highly stable layout that prevents any formatting issues on iPad or other devices.
- A professional and business-oriented appearance.
- Simplicity and speed for daily use.

Deliverables must include:
- The final template in Excel format (.xlsx).
- A version fully compatible with Google Sheets.
- Print-ready formatting.
- An iPad-friendly layout that ensures a seamless user experience.

Desired workflow for the template user:
1. Open the template.
2. Edit client details and pricing information.
3. Export the completed proposal as a PDF.
4. Send the PDF to the client.

The preferred style is modern, minimal, premium, professional, and clean, avoiding any cluttered or overly complicated corporate designs. We are looking for a freelancer with proven experience in designing professional business templates and mobile-friendly spreadsheet solutions.