body {
    display: grid;
    grid-template-rows: auto 1fr auto;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
  }
  
  header {
    width: 100%;
    background-color: #008000;
    color: #fff;
    padding: 10px 0;
    text-align: center;
  }

  footer {
    width: 100%;
    background-color: #333;
    color: #fff;
    padding: 10px 0;
    text-align: center;
  }
  
  main {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }
  
  form {
    width: 100%;
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
    background-color: #D3D3D3;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.1);
  }
  
  form label {
    display: block;
    margin-bottom: 10px;
  }
  
  form textarea {
    width: 90%;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
    resize: none;
  }
  
  .button-container {
    display: flex;
    justify-content: space-between;
  }
  
  form input[type="submit"] {
    width: 48%;
    padding: 10px;
    border-radius: 5px;
    border: none;
    color: #fff;
    background-color: #008000;
    cursor: pointer;
  }
  
  form input[type="reset"] {
    width: 48%;
    padding: 10px;
    border-radius: 5px;
    border: none;
    color: #fff;
    background-color: #ff0000;
    cursor: pointer;
  }
  
  form input[type="submit"]:hover {
    background-color: #006600;
  }
  
  form input[type="reset"]:hover {
    background-color: #cc0000;
  }
  
  #result {
    text-align: center;
    margin-top: 20px;
    width: 100%;
    max-width: 300px;
    border-collapse: collapse;
    border: 1px solid #ddd;
  }
  
  #result th, #result td {
    padding: 10px;
    border: 1px solid #ddd;
  }
  
  #result th {
    font-weight: bold;
    text-align: center;
  }
  
  #result td {
    text-align: left;
  }
  
  table tr:nth-child(even) {
    background-color: #f2f2f2;
  }
  
  button {
    margin-top: 20px;
    padding: 10px;
    border-radius: 5px;
    border: none;
    color: #fff;
    background-color: #008000;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #006600;
  }
  
  .footer-link {
    color: #fff;
    text-decoration: none;
  }
  
  .footer-link:hover {
    color: #ddd;
  }