body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

#customButton {
    position: fixed;
    top: 10px;
    right: 10px;
    background-color: white;
    color: black;
    border: none;
    border-radius: 15px;
    padding: 10px 20px;
    cursor: pointer;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
}

#popupContainer {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
    display: none;
}

#codeInput {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

#submitCodeButton {
    background-color: green;
    color: white;
    border: none;
    border-radius: 5px;
    padding: 10px;
    cursor: pointer;
}

#resultMessage {
    margin-top: 10px;
    color: red;
}

.hidden {
    display: none;
}