* {
    box-sizing: border-box;
    font-family: Arial, sans-serif;
    text-align: center;
}

body {
    font-family: Arial, sans-serif;
    text-align: center;
    padding: 50px;
}

#qr-container {
    margin: 20px auto;
    padding: 20px;
    background: white;
    display: inline-block;
}
button {
    background: #4CAF50;
    color: white;
    padding: 10px 20px;
    margin: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    text-align: center;
}
.quadro {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center
}
button:hover {
    background: #45a049;
}
input {
    padding: 10px;
    width: 300px;
    margin: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
}