body {
    margin: 0;
    padding: 0;
    background-color: #F8F8F8;
  }
  
  .container {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    margin-top: 50px;
    box-sizing: border-box;
  }
  
  h1 {
    font-size: 28px;
    margin: 0 0 20px 0;
    text-align: center;
  }
  
  form {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  input[type="text"] {
    width: 100%;
    margin-bottom: 20px;
    padding: 10px;
    border: none;
    border-radius: 3px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
    font-size: 16px;
    box-sizing: border-box;
  }
  
  input[type="submit"] {
    padding: 10px;
    border: none;
    border-radius: 3px;
    background-color: #0066FF;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
  }
  
  input[type="submit"]:hover {
    background-color: #0052CC;
  }
  
  input[type="text"]:focus {
    outline: none;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
  }
  
  input[type="text"]::placeholder {
    color: #aaa;
  }
  
  p.result {
    font-size: 16px;
    margin-top: 20px;
    text-align: center;
  }