body {
    font-family: Arial, sans-serif;
    background: #f6f6f6;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    width: 300px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

input {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
}

button {
    width: 100%;
    padding: 10px;
    background: black;
    color: white;
    border: none;
    cursor: pointer;
}

#qrcode {
    margin-top: 20px;
}