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

.container {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    width: 300px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

input {
    padding: 8px;
    width: 80%;
    margin: 10px 0;
}

button {
    padding: 8px 15px;
    cursor: pointer;
}

#message {
    font-weight: bold;
    margin-top: 15px;
}