System Requirements Document for kinetic-simple

Introduction

The project "kinetic-simple" aims to deliver a simple, single-page calculator. The design is inspired by Susan Kare's approach to pixel-perfect, user-friendly interfaces, ensuring clarity and ease of use for quick calculations. The target audience includes general users seeking a straightforward tool for basic arithmetic operations.

System Overview

The "kinetic-simple" project will deliver a single-page calculator with a focus on simplicity and usability. The calculator will allow users to enter values or expressions, perform calculations, and review results, all within a cohesive experience. The design will adhere to a pixel-inspired aesthetic, ensuring clarity and ease of use. The calculator will be accessible anonymously, with no identity or session continuity required.

Product Interpretation and Delivery Boundary

The calculator is delivered as a single-page application, accessible to users without any login or identity verification. The design emphasizes simplicity, with a focus on clear, pixel-inspired visuals and intuitive interactions. The project scope is limited to the current delivery of a basic calculator, with no additional features or pages planned for future expansion.

Page Content and Component Coverage

Calculator

• Numeric Display:

  • Pixel-art inspired display for showing entered values and results.
  • Clear, prominent digits for easy readability.

• Keypad:

  • Numeric keys (0-9) and basic arithmetic operators (+, -, *, /).
  • Primary orange (#FF5722) for key buttons to draw attention.
  • Accent yellow (#FFC107) for secondary functions like clear or equals.
  • Responsive button animations mimicking physical press-and-release actions.
  • Hover effects for visual feedback on interactive elements.

• Functionality:

  • Enter values or expressions.
  • Calculate and display results.
  • Clear current calculation to start a new one.

• Layout:

  • Grid-based layout with clear boundaries and ample spacing.
  • Rounded rectangles for buttons to enhance usability.

• Error Handling:

  • Display error messages for invalid inputs or operations.
  • Clear button to reset the calculator state.

Functional Requirements

1. As a Calculator User, I should be able to anonymously open the Calculator page.

   • Provenance: required_inference
   • Trigger: User accesses the calculator URL.
   • Result: Calculator page is displayed with all functionalities accessible.
   • Acceptance: User can interact with the calculator without any login.

2. As a Calculator User, I should be able to enter a value or expression, calculate and review the result, then clear the current calculation to continue.

   • Provenance: required_inference
   • Trigger: User inputs values or expressions.
   • Result: Calculation is performed, and the result is displayed.
   • Acceptance: User can clear the current calculation and start a new one.

User Personas

Calculator User

• Context: Uses the calculator for quick, basic arithmetic operations.
• Primary Goal: Perform calculations efficiently and accurately.
• Responsibilities: Enter values and expressions, perform calculations, review results, and clear calculations to start anew.
• Interactions: Engages with the calculator interface to input data and receive results.
• Success: Successfully performs calculations and receives accurate results.

Core User Flows

1. Accessing the Calculator

   • Starting Context: User opens the calculator URL.
   • Action: The Calculator User accesses the page.
   • Result: The calculator interface is displayed.
   • Next Step: User can begin entering values or expressions.

2. Performing a Calculation

   • Starting Context: Calculator interface is open.
   • Action: User enters a value or expression using the keypad.
   • Result: The entered expression is displayed on the numeric display.
   • Next Step: User presses the equals button to calculate the result.

3. Reviewing and Clearing Results

   • Starting Context: Calculation result is displayed.
   • Action: User reviews the result.
   • Result: User presses the clear button to reset the calculator.
   • Next Step: User can start a new calculation.

Visuals Colors and Theme

• Muse: Susan Kare
• Palette:
  • Background: #FFFFFF
  • Surface: #F5F5F5
  • Text: #000000
  • Primary: #FF5722
  • Accent: #FFC107
  • Muted: #E0E0E0
• Typography:
  • Headings: Press Start 2P
  • Body: Roboto Mono
  • Scale: 1.333 modular, 24/18/14/12
• Shape Language: Iconic tiles, rounded rectangles
• Layout: Grid-based with ample spacing
• Motion: Frame-by-frame micro animations for button presses and result displays

Signature Design Concept

The calculator interface will feature a clean, grid-organized layout with a prominent pixel-style numeric display. Bright primary buttons will be used on a light background, with distinctive, brightly colored key buttons featuring a tactile shadow effect. Responsive button animations will mimic physical press-and-release actions, providing a playful, retro visual style.

Interaction Model & Motion Direction

• Interaction Model: Animated
• Motion Tempo: Restrained
• Hero Dimensionality: Flat
• Landing Hero Motion Brief:
  • Focal Subject: Pixel-style numeric display
  • Input→Transformation→Outcome: User inputs values, transformation through calculation, outcome displayed as result.
  • Motion Vocabulary: Frame-by-frame micro animations
  • Composed First Frame: Calculator interface with numeric display and keypad
  • Reduced-Motion State: Static display with no animations

Non-Functional Requirements

• Performance: The calculator must perform calculations quickly and efficiently.
• Usability: The interface should be intuitive and easy to navigate.
• Accessibility: Ensure the design is accessible to users with disabilities.

Tech Stack

• Frontend: React
• Styling: CSS for layout and animations
• Deployment: Docker for containerization

Assumptions and Constraints

• The calculator will remain a single-page application.
• No user authentication or session management is required.
• The design will adhere to the specified color palette and typography.

Glossary

• Calculator User: The individual interacting with the calculator to perform arithmetic operations.
• Numeric Display: The area of the calculator interface where entered values and results are shown.
• Keypad: The set of buttons used to input numbers and operations into the calculator.