body {
    font-family: Arial, sans-serif;
    text-align: center;
}

#app {
    margin-top: 50px;
}

.hidden {
    display: none;
}

#popup {
    margin: 20px auto;
    width: 300px;
    padding: 20px;
    border: 1px solid #ccc;
    background-color: #f9f9f9;
}

.qr-code-item {
    margin: 10px 0;
    position: relative;
}

.claimed-label {
    position: absolute;
    top: 0;
    left: 0;
    background-color: red;
    color: white;
    padding: 5px;
}