Mango-Calculator System Requirements Document

Introduction

The Mango-Calculator project aims to develop a simple, user-friendly calculator application with a single-page design. The focus is on providing basic arithmetic operations without any additional features, ensuring a clean and minimal user interface.

System Overview

The Mango-Calculator will be a web-based application designed to perform basic arithmetic operations such as addition, subtraction, multiplication, and division. The application will be accessible through a single-page interface, ensuring ease of use and quick access to functionalities. The design will prioritize simplicity and clarity, making it suitable for users who require straightforward calculations without any distractions.

Functional Requirements

• As a User, I should be able to perform addition.
• As a User, I should be able to perform subtraction.
• As a User, I should be able to perform multiplication.
• As a User, I should be able to perform division.

User Personas

• User: Individuals who need to perform basic arithmetic calculations quickly and efficiently. They prefer a straightforward interface without complex features.

Visuals Colors and Theme

• primary: #4A90E2 (a calming blue to convey simplicity and trust)
• primary_light: #A6C8F0 (a lighter blue for hover states and secondary UI elements)
• secondary: #F5A623 (a warm orange for emphasis and highlights)
• accent: #D0021B (a vibrant red for call-to-action buttons and active states)
• highlight: #F8E71C (a bright yellow for hover states and notifications)
• bg: #FFFFFF (a clean white background for clarity)
• surface: rgba(255, 255, 255, 0.9) (a slightly opaque white for panels)
• text: #333333 (a dark gray for primary text)
• text_muted: #777777 (a lighter gray for secondary text and labels)
• border: rgba(0, 0, 0, 0.1) (a subtle gray for borders)

Signature Design Concept

The Mango-Calculator will feature an interactive "floating keypad" design. The calculator buttons will appear to float above the background, casting subtle shadows to create a sense of depth. When a button is pressed, it will animate with a smooth, spring-like motion using framer-motion, providing tactile feedback. The background will subtly shift colors based on the time of day, transitioning from a soft morning blue to a warm evening orange, creating a dynamic and engaging user experience. Users can drag the calculator around the screen, allowing for a customizable layout that adapts to their preferences.

Interaction Model & Motion Direction

The interaction model for the Mango-Calculator will be "animated." The single-page design will feature moderate scroll-triggered reveals and hover transitions. The calculator buttons will have spring physics on interactive elements, providing a polished and responsive feel. The design will ensure that the calculator remains intuitive and easy to use, with minimal motion to maintain focus on functionality.

Non-Functional Requirements

• The application should load within 2 seconds on a standard internet connection.
• The interface should be responsive and accessible on both desktop and mobile devices.
• The application should handle up to 100 concurrent users without performance degradation.

Tech Stack

• Frontend: React for Web
• Backend: Python with FastAPI
• Database: Not applicable, as the application does not require data persistence.

Assumptions and Constraints

• The calculator will only perform basic arithmetic operations.
• The application will be designed for a single-page layout.
• No user authentication or data storage is required.

Glossary

• Single-page design: A web application design where all content is accessible on one page, without the need for navigation to multiple pages.
• Basic arithmetic operations: Mathematical operations including addition, subtraction, multiplication, and division.