style.css

/* General Page Styling */
body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
  }
  
  /* Calculator Container */
  .calculator {
    background-color: #333;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.5);
    width: 260px;
  }
  
  /* Display Screen */
  #display {
    width: 95%;
    height: 50px;
    font-size: 1.5rem;
    text-align: right;
    margin-bottom: 10px;
    border: none;
    outline: none;
    padding: 10px;
    border-radius: 5px;
    background: #222;
    color: #fff;
  }
  
  /* Buttons Grid */
  .buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
  }
  
  /* Button Styling */
  button {
    padding: 15px;
    font-size: 1.2rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    color: white;
    background-color: #555;
    transition: background 0.3s;
  }
  
  button:hover {
    background-color: #777;
  }
  
  .clear {
    background-color: #e74c3c;
  }
  
  .clear:hover {
    background-color: #ff6b5a;
  }
  
  .equal {
    grid-column: span 2; /* Makes '=' button double-width */
    background-color: #28a745;
  }
  
  .equal:hover {
    background-color: #34d058;
  }