body {
    text-align: center;
    margin-top: 100px;
    font-family: Arial, sans-serif;
}

.title {
    font-size: 32px;
}

label {
    font-size: 20px;
}

input {
    margin-top: 10px;
    padding: 5px 10px;
    font-size: 16px;
}

button {
    margin-top: 10px;
    padding: 5px 10px;
    font-size: 16px;
    background-color: #4CAF50;
    color: white;
    border: none;
}

#result {
    margin-top: 20px;
    font-size: 24px;
}

.score {
    margin-top: 20px;
    font-size: 24px;
}
.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
}

.popup-content {
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
}

.popup-content input[type="text"],
.popup-content button {
    margin-top: 10px;
    padding: 5px 10px;
}

.popup-content button {
    background-color: #4CAF50;
    color: white;
    border: none;
}

.popup-content button + button {
    margin-left: 10px;
}

.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #4CAF50;
    color: white;
    padding: 10px;
    border-radius: 5px;
    display: none;
    animation: fade-in 0.5s;
}

@keyframes fade-in {
    from {opacity: 0;}
    to {opacity: 1;}
}
#qrcode {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 200px;
    height: 200px;
    margin: 20px auto;
    border: 1px solid #ccc;
}