#fdSmsForm {
    font-family: Arial, sans-serif;
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background-color: #f9f9f9;
}

#fdSmsForm input[type="checkbox"] {
    margin-right: 10px;
}

#fdSmsForm select, #fdSmsForm input[type="text"] {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0;
    display: inline-block;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

#fdSmsForm select:focus, #fdSmsForm input[type="text"]:focus {
    outline: none;
    border-color: #4CAF50;
}

#fdSmsToggleCustomMessage {
    background-color: #f44336;
    color: white;
}

#fdSmsToggleCustomMessage:hover {
    background-color: #d32f2f;
}