body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    text-align: center;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

input[type="text"] {
    width: 80%;
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    padding: 10px 20px;
    background-color: #28a745;
    border: none;
    color: white;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #218838;
}

#message {
    margin-top: 20px;
    color: red;
}