body {
    background-color: rgb(213, 225, 239);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}
.whitebox { 
    width: 100%;
    background-color: white;
    max-width: 340px;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(17, 21, 61, 0.15);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
}

.qr-code {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 10px;
    display: block;
    margin-bottom: 1.2rem;
}

h1 {
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    font-size: 1.5rem;
    margin: 1rem 0 0.5rem 0;
}

p {
    font-family: Arial, Helvetica, sans-serif;
    color: #7F848A;
    text-align: center;
    font-size: 1rem;
    margin: 0 0 1rem 0;
}

.attribution {
    margin-top: center;
    width: 100%;
    text-align: center;
    font-size: 9px;
    padding: 1rem 1 0 0;
}

/* Responsive for mobile */
@media (max-width: 400px) {
    .whitebox {
        max-width: 90vw;
        padding: 1rem;
    }
    .qr-code {
        max-width: 90vw;
    }
    h1 {
        font-size: 1.1rem;
    }
    p {
        font-size: 0.95rem;
    }
}