System Requirements Document for terra-simple

1. Introduction

The project "terra-simple" aims to deliver a simple calculator application. The primary intent is to provide a straightforward, single-page calculator that allows users to perform basic arithmetic operations with a clear and intuitive design. The target audience is any user needing a basic calculator for everyday use.

2. System Overview

The terra-simple project will deliver a single-page calculator application. The application will allow users to input values and operations, evaluate expressions, and display results. The design will focus on simplicity and clarity, ensuring a user-friendly experience. The calculator will be accessible without any login or identity requirements.

2a. Product Interpretation and Delivery Boundary

The calculator will be delivered as a web application with a single-page interface. The application will not require user accounts or identity management, ensuring immediate access for all users. The design will adhere to the constraints of being simple and single-page, with no additional functionalities beyond basic arithmetic operations.

2b. Source Content Inventory

Not applicable as there is no content_source directive.

2c. Page Content and Component Coverage

Calculator

• Numerical Input and Display

  • Users can input numbers and view the current expression.
  • Display area for showing the result of calculations.

• Operation Buttons

  • Buttons for basic arithmetic operations: addition, subtraction, multiplication, and division.
  • A clear button to reset the current calculation.

• Evaluation and Result Display

  • Mechanism to evaluate the entered expression and display the result.
  • Error handling for invalid inputs or operations.

• User Interaction

  • Hover effects on buttons to enhance interaction.
  • Split-screen layout with a clear division between input/display and operation buttons.

3. Functional Requirements

• As a Calculator User, I should be able to enter numerical values and arithmetic operations on the Calculator page. (Provenance: required_inference)
• As a Calculator User, I should be able to evaluate the current calculation and see the result displayed on the Calculator page. (Provenance: required_inference)
• As a Calculator User, I should be able to clear or reset the current calculation to start a new one. (Provenance: required_inference)

4. User Personas

• Calculator User
  • Responsibilities: Enter expressions or values, perform calculations, and obtain results.
  • Outcomes: Successfully perform basic arithmetic operations and view results.

5. Core User Flows

1. Performing a Calculation

   • The Calculator User accesses the Calculator page.
   • The user inputs numerical values and selects arithmetic operations.
   • The user presses the evaluate button to compute the result.
   • The result is displayed on the screen.
   • The user can clear the current calculation to start a new one.

2. Clearing a Calculation

   • The Calculator User presses the clear button.
   • The current input and result are reset, allowing the user to start a new calculation.

6. Visuals Colors and Theme

• Muse: Adham Dannaway
• Palette:
  • Background: #FFFFFF
  • Surface: #F5F5F5
  • Text: #333333
  • Primary: #FF5722
  • Accent: #00BCD4
  • Muted: #BDBDBD
• Typography:
  • Headings: Barlow Condensed — Large, bold, all-caps, tight tracking
  • Body: Space Mono
  • Scale: 1.25 modular, 48/32/24/18/16
• Shape Language: Split-screen layout with rounded inputs
• Layout: Split-screen with numerical input/display on one side and operation buttons on the other
• Motion: Subtle reveal-by-hover effects on buttons and inputs

7. Signature Design Concept

The public entry page will feature a split-screen design, with the calculator interface on one side and a wireframe overlay demonstrating use on the other. The design will use a diagonal divide with contrasting color schemes, large bold numerical displays, and interactive wireframe overlays during hover states.

8. Interaction Model & Motion Direction

• Interaction Model: Static
• Motion Tempo: Restrained
• Hero Dimensionality: Flat
• Landing Hero Motion Brief:
  • Focal Subject: Calculator interface with wireframe overlay
  • Input→Transformation→Outcome: User inputs values, selects operations, and sees results
  • Motion Vocabulary: Subtle hover effects
  • Composed First Frame: Calculator interface with clear input and operation sections
  • Reduced-Motion State: Static display without hover effects

9. Non-Functional Requirements

• The application must be responsive and accessible on various devices.
• The design must prioritize clarity and simplicity, avoiding excessive animations or unclear interaction cues.

10. Tech Stack

• Frontend: React
• Backend: None required for basic calculator functionality
• Deployment: Static web hosting

11. Assumptions and Constraints

• The calculator will only perform basic arithmetic operations.
• The design will remain a single-page application.
• No user accounts or identity management will be implemented.

12. Glossary

• Calculator User: The individual using the calculator application to perform arithmetic operations.
• Arithmetic Operations: Basic mathematical operations including addition, subtraction, multiplication, and division.