keen-calculator System Requirements Document

Introduction

The keen-calculator project aims to develop a simple, user-friendly calculator application. This application will focus on providing basic arithmetic operations within a single-page design, ensuring a minimalistic and intuitive user experience.

System Overview

The keen-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 via a single-page interface, emphasizing simplicity and ease of use. The target audience includes users who require quick and straightforward calculations without the need for advanced mathematical functions.

Functional Requirements

• As a User, I should be able to perform addition, subtraction, multiplication, and division.
• As a User, I should be able to clear the current calculation to start a new one.
• As a User, I should be able to view the result of my calculation instantly.

User Personas

• User: An individual seeking a quick and easy way to perform basic arithmetic calculations without the complexity of advanced features.

Visuals Colors and Theme

The keen-calculator will feature a unique color palette to enhance its minimalistic design:

• primary: #4A90E2 (a calm blue for the main interface)
• primary_light: #A6C8FF (a lighter blue for hover states)
• secondary: #F5A623 (a warm orange for emphasis and highlights)
• accent: #50E3C2 (a vibrant teal for call-to-action buttons)
• highlight: #F8E71C (a bright yellow for active states and notifications)
• bg: #FFFFFF (a clean white for the page background)
• surface: rgba(255, 255, 255, 0.9) (a slightly transparent white for panels)
• text: #333333 (a dark gray for primary text)
• text_muted: #777777 (a softer gray for secondary text)
• border: rgba(0, 0, 0, 0.1) (a subtle gray for borders)

Signature Design Concept

The keen-calculator will feature an interactive "floating keypad" design. The keypad will appear to float above the background, casting a soft shadow. As users hover over the keys, they will gently rise and change color, providing a tactile response. The display area will animate numbers as they are entered, sliding them into place with a smooth transition. This concept will be implemented using framer-motion for fluid animations and hover effects, creating an engaging and responsive user experience.

Interaction Model & Motion Direction

The landing page of the keen-calculator will utilize an "animated" interaction model. This will include moderate scroll-triggered reveals and hover transitions, enhancing the user experience without overwhelming the simplicity of the application. The focus will be on smooth transitions and responsive interactions, ensuring that the calculator remains intuitive and easy to use.

Non-Functional Requirements

• The application should load within 2 seconds on a standard internet connection.
• The interface should be responsive and accessible on various devices, including desktops, tablets, and smartphones.
• The application should handle up to 100 concurrent users without performance degradation.

Tech Stack

• Frontend: React for Web
• Backend: Not applicable (client-side only application)
• Database: Not applicable (no data persistence required)

Assumptions and Constraints

• The application will be used primarily in India, considering locale-specific defaults such as currency and timezone are not applicable.
• The calculator will not support advanced mathematical functions or operations.
• The application will be designed to function offline once loaded.

Glossary

• Arithmetic Operations: Basic mathematical functions including addition, subtraction, multiplication, and division.
• Single-page Design: A web application design where all content is accessible on one page without navigating to different pages.
• Responsive Design: An approach to web design that makes web pages render well on a variety of devices and window or screen sizes.