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35
CLAUDE.md
35
CLAUDE.md
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# Simple Calculator
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Greenfield project. Implementation is driven by the Vexa AI-SDLC pipeline (Jira project TSC).
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## Project Structure
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```
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/
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├── index.html # Calculator UI (semantic HTML5)
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├── styles.css # Responsive CSS layout and styling
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├── README.md # Project overview
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└── CLAUDE.md # This file
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```
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## Build Commands
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No build system has been configured yet. Update this section once a language/framework is chosen and dependencies are added.
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## Test Commands
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No test suite has been configured yet. Update this section once testing infrastructure is in place.
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## Development Commands
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No dev server or REPL is configured yet. Update this section once the implementation begins.
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## Architecture Notes
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- **Domain**: Simple Calculator — arithmetic operations (add, subtract, multiply, divide at minimum).
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- **Stack**: Plain HTML/CSS/JS — no framework or build step.
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- `index.html` contains the full UI structure: operand inputs, operation buttons, calculate/clear buttons, result `<output>`, and an error `<p role="alert">`.
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## Code Style
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No linter or formatter has been configured yet. Update this section once tooling is set up.
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# Simple Calculator
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# test-simple-calculator
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Greenfield project. Implementation is driven by the Vexa AI-SDLC pipeline (Jira project TSC).
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55
index.html
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index.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Simple Calculator</title>
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<link rel="stylesheet" href="styles.css">
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</head>
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<body>
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<main>
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<h1>Simple Calculator</h1>
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<form id="calculator-form" novalidate>
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<fieldset>
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<legend>Operands</legend>
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<div>
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<label for="operand1">First Number</label>
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<input type="number" id="operand1" name="operand1" step="any" required aria-required="true" autocomplete="off">
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</div>
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<div>
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<label for="operand2">Second Number</label>
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<input type="number" id="operand2" name="operand2" step="any" required aria-required="true" autocomplete="off">
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</div>
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</fieldset>
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<fieldset>
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<legend>Operation</legend>
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<div role="group" aria-label="Select operation">
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<button type="button" name="operation" value="add" aria-pressed="false">Add (+)</button>
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<button type="button" name="operation" value="subtract" aria-pressed="false">Subtract (−)</button>
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<button type="button" name="operation" value="multiply" aria-pressed="false">Multiply (×)</button>
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<button type="button" name="operation" value="divide" aria-pressed="false">Divide (÷)</button>
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</div>
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</fieldset>
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<div>
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<button type="submit" id="calculate-btn">Calculate</button>
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<button type="reset" id="clear-btn">Clear</button>
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</div>
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</form>
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<section aria-live="polite" aria-atomic="true">
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<h2>Result</h2>
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<output id="result" for="operand1 operand2" aria-label="Calculation result"></output>
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</section>
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<section aria-live="assertive" aria-atomic="true">
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<p id="error-message" role="alert" aria-label="Error message"></p>
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</section>
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</main>
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</body>
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</html>
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266
styles.css
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styles.css
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/* ===== Reset & Base ===== */
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*, *::before, *::after {
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box-sizing: border-box;
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margin: 0;
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padding: 0;
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}
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body {
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font-family: system-ui, -apple-system, sans-serif;
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font-size: 1rem;
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line-height: 1.5;
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color: #1a1a1a;
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background-color: #f0f2f5;
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min-height: 100vh;
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display: flex;
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align-items: flex-start;
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justify-content: center;
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padding: 1rem;
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}
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/* ===== Main container ===== */
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main {
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background: #ffffff;
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border-radius: 8px;
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box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
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padding: 1.5rem;
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width: 100%;
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max-width: 480px;
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display: flex;
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flex-direction: column;
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gap: 1.5rem;
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}
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/* ===== Typography hierarchy ===== */
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h1 {
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font-size: 1.75rem;
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font-weight: 700;
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color: #1a1a1a;
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text-align: center;
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}
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h2 {
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font-size: 1.125rem;
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font-weight: 600;
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color: #1a1a1a;
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margin-bottom: 0.5rem;
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}
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/* ===== Form ===== */
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#calculator-form {
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display: flex;
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flex-direction: column;
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gap: 1.25rem;
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}
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fieldset {
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border: 1px solid #d0d0d0;
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border-radius: 6px;
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padding: 1rem;
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}
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legend {
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font-size: 0.9375rem;
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font-weight: 600;
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color: #1a1a1a;
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padding: 0 0.5rem;
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}
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fieldset > div + div {
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margin-top: 1rem;
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}
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/* ===== Labels & Inputs ===== */
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label {
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display: block;
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font-size: 0.9375rem;
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font-weight: 500;
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color: #1a1a1a;
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margin-bottom: 0.375rem;
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}
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input[type="number"] {
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display: block;
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width: 100%;
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min-height: 44px;
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padding: 0.625rem 0.75rem;
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border: 2px solid #767676;
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border-radius: 4px;
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font-size: 1rem;
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color: #1a1a1a;
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background: #ffffff;
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-moz-appearance: textfield;
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appearance: textfield;
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}
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input[type="number"]::-webkit-inner-spin-button,
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input[type="number"]::-webkit-outer-spin-button {
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-webkit-appearance: none;
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}
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input[type="number"]:focus {
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outline: 3px solid #1565c0;
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outline-offset: 1px;
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border-color: #1565c0;
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}
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/* ===== Operation buttons ===== */
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[role="group"] {
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display: grid;
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grid-template-columns: 1fr 1fr;
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gap: 0.5rem;
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}
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button[name="operation"] {
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min-height: 44px;
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min-width: 44px;
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padding: 0.625rem 0.5rem;
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border: 2px solid #767676;
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border-radius: 4px;
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background: #f5f5f5;
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color: #1a1a1a;
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font-size: 0.9375rem;
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font-weight: 500;
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cursor: pointer;
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transition: background-color 0.15s, border-color 0.15s, color 0.15s;
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}
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button[name="operation"]:hover {
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background: #e0e0e0;
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border-color: #1565c0;
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}
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button[name="operation"][aria-pressed="true"] {
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background: #1565c0;
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border-color: #1565c0;
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color: #ffffff;
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}
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button[name="operation"]:focus-visible {
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outline: 3px solid #1565c0;
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outline-offset: 2px;
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}
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/* ===== Action buttons (Calculate / Clear) ===== */
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#calculator-form > div {
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display: flex;
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gap: 0.75rem;
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}
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#calculate-btn,
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#clear-btn {
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flex: 1;
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min-height: 44px;
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min-width: 44px;
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padding: 0.625rem 1rem;
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border: 2px solid transparent;
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border-radius: 4px;
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font-size: 1rem;
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font-weight: 600;
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cursor: pointer;
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transition: background-color 0.15s;
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}
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#calculate-btn {
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background: #1565c0;
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color: #ffffff;
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}
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#calculate-btn:hover {
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background: #0d47a1;
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}
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#clear-btn {
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background: #f5f5f5;
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color: #1a1a1a;
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border-color: #767676;
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}
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#clear-btn:hover {
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background: #e0e0e0;
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}
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#calculate-btn:focus-visible,
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#clear-btn:focus-visible {
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outline: 3px solid #1565c0;
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outline-offset: 2px;
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}
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/* ===== Result section ===== */
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section:first-of-type {
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border: 1px solid #d0d0d0;
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border-radius: 6px;
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padding: 1rem;
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background: #f8f9fa;
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}
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#result {
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display: block;
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font-size: 1.5rem;
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font-weight: 700;
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color: #1a1a1a;
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min-height: 2rem;
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}
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/* ===== Error section ===== */
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#error-message {
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font-size: 0.9375rem;
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font-weight: 500;
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color: #c62828;
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min-height: 1.25rem;
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}
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/* ===== Tablet (768px+) ===== */
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@media (min-width: 768px) {
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body {
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padding: 2rem;
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align-items: center;
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}
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main {
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padding: 2rem;
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gap: 2rem;
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}
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h1 {
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font-size: 2rem;
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}
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fieldset > div {
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display: flex;
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align-items: center;
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gap: 1rem;
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}
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fieldset > div + div {
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margin-top: 0.75rem;
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}
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fieldset > div label {
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flex: 0 0 140px;
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margin-bottom: 0;
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}
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fieldset > div input {
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flex: 1;
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}
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[role="group"] {
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grid-template-columns: repeat(4, 1fr);
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}
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}
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/* ===== Desktop (1024px+) ===== */
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@media (min-width: 1024px) {
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main {
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max-width: 560px;
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}
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h1 {
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font-size: 2.25rem;
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}
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#result {
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font-size: 1.75rem;
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}
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}
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Reference in New Issue
Block a user