body {
            width: 100%;
            height: 100vh;
            font-family: Arial, sans-serif;
            text-align: center;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            overflow: hidden;
            background-color: #f0f0f0;
        }
        
        h1 {
            color: #333;
        }
        
        .form {
            margin: 0px auto;
            width: 400px;
        }
        
        .form input[type="text"] {
            width: 300px;
            padding: 10px;
            font-size: 16px;
        }
        
        .form input[type="submit"] {
            background-color: #4CAF50;
            border: none;
            color: white;
            padding: 12px 30px;
            margin-top: 20px;
            text-align: center;
            font-size: 16px;
            cursor: pointer;
        }
        
        .thumbnail {
            margin: 20px auto;
            width: 400px;
        }
        
        .thumbnail img {
            max-width: 100%;
        }