.preview-container {
    text-align: center;
    padding: 50px;
}

.preview-container h1 {
    font-size: 2.5em;
    margin-bottom: 30px;
}

.invitation {
    border: 1px solid #ccc;
    padding: 20px;
    margin-bottom: 30px;
}

.preview-container form {
    display: inline-block;
    margin: 10px;
}

.preview-container input[type="submit"] {
    background-color: #5cb85c;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.2em;
    cursor: pointer;
    transition: background-color 0.3s;
}

.preview-container input[type="submit"]:hover {
    background-color: #4cae4c;
}