::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: #202632;
    border-radius: 5px;
}
::-webkit-scrollbar-thumb {
    background-color: #2d3545;
    border-radius: 5px;
    border: 2px solid #202632;
}

::-webkit-scrollbar-thumb:hover {
    background-color: #3a4457;
}

.qr-img-preview {
    position: relative;
    display: inline-block;
    background: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0,0,0,0.15);
}