/* Reset some browser defaults */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  }
  
  /* Overall page container */
  body {
    background: #f0f4f8;
    color: #333;
    padding: 20px;
    display: flex;
    justify-content: center;
  }
  
  /* Main app container */
  .container {
    background: #ffffff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    width: 100%;
  }
  
  /* Heading */
  .container h1 {
    text-align: center;
    margin-bottom: 25px;
    color: #0a5d99;
  }
  
  /* Form and inputs */
  form {
    display: flex;
    flex-direction: column;
    gap: 15px;
  }
  
  label {
    font-weight: 600;
    margin-bottom: 5px;
  }
  
  input[type="number"] {
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid #ccc;
    width: 100%;
  }
  
  #matrix-inputs input {
    width: 80px;
    margin: 5px;
    padding: 6px;
    border: 1px solid #aaa;
    border-radius: 5px;
    text-align: center;
  }
  
  /* Buttons */
  button {
    padding: 10px 15px;
    background-color: #0a5d99;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  button:hover {
    background-color: #084a7c;
  }
  
  #download-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
  }
  
  #result {
    background: #f9f9f9;
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 10px;
    margin-top: 20px;
    white-space: pre-wrap;
  }
  
  /* Conclusion Text */
  #conclusion {
    margin-top: 15px;
    font-style: italic;
    color: #2a6c3f;
    font-weight: 500;
  }
  
  /* Responsive behavior */
  @media (max-width: 600px) {
    #matrix-inputs input {
      width: 60px;
    }
  
    #download-btns {
      flex-direction: column;
      align-items: center;
    }
  
    button {
      width: 100%;
    }
  }