body { 
    font-family: "Ubuntu", sans-serif; 
    background-color: #f0f0f0; 
    margin: 0; 
    padding: 0; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    height: 100vh; 
} 
  
/* Style the container */
.container { 
    background-color: #fff; 
    box-shadow: 0px 0px 10px
        rgba(0, 0, 0, 0.1); 
    border-radius: 5px; 
    padding: 20px; 
    text-align: center; 
} 
  
/* Style the header */
.header { 
    text-align: center; 
} 
  
/* Style the h1 element */
h1 { 
    font-size: 28px; 
    margin-bottom: 10px; 
    color: #333; 
} 
  
/* Style the hr element */
hr { 
    border: 1px solid #ddd; 
    margin: 20px 0; 
} 
  
/* Style the input field */
input[type="text"] { 
    width: 100%; 
    padding: 10px; 
    font-size: 16px; 
    border: 1px solid #ccc; 
    border-radius: 5px; 
    outline: none; 
} 
  
/* Style the QR code div */
.qrcode { 
    margin: 20px 0; 
} 
  
/* Style the button */
button { 
    background-color: #007bff; 
    color: #fff; 
    padding: 10px 20px; 
    font-size: 16px; 
    border: none; 
    border-radius: 5px; 
    cursor: pointer; 
    outline: none; 
} 
  
/* Hover effect for the button */
button:hover { 
    background-color: #0056b3; 
}