Professional Mobile Login Page Design

I'm seeking a UI/UX designer to create a professional, minimalist design for a mobile login page. The design should focus on simplicity and usability, consistent with a professional style.

Key Requirements:
- Experience in mobile UI/UX design
- Strong understanding of professional, minimalist design principles
- Ability to create user-friendly designs

Input Fields:
- The login page should include an input field for 'Username or email'.

Please note, this project does not include the necessity for a logo or other elements, nor additional input fields or options such as 'Remember Me' or 'Link to Password Recovery'. The focus is strictly on a simple, professional design for a mobile login page.