Building A Calculator Interface With Software Engineering Principles

A simple calculator built with HTML, CSS, and JavaScript. Users can input numbers and operators to perform basic arithmetic operations.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Neon Glass Calculator</title>
  <style>
   *{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
   }
   body{
    font-family: "Poppins",sans-serif;
    background: linear-gradient(135deg, #000428, #004e92);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
   }
   .calculator{
    background: rgba(255, 255, 255, 0.1);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.37);
      backdrop-filter: blur(10p...

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