.qr-code-generator {
width: 500px;
margin: 0 auto;
}

.qr-code-generator * {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}

#qrcode {
width: 128px;
height: 128px;
margin: 0 auto;
text-align: center;
}

#qrcode a {
font-size: 0.8em;
}

.qr-url, .qr-size {
padding: 0.5em;
border: 1px solid #ddd;
border-radius: 2px;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}

.qr-url {
width: 79%;
}

.qr-size {
width: 20%;
}

.generate-qr-code {
display: block;
width: 100%;
margin: 0.5em 0 0;
padding: 0.25em;
font-size: 1.2em;
border: none;
cursor: pointer;
background-color: #e5554e;
color: #fff;
}

h1 {
font-family: Arial, Helvetica, sans-serif;
text-align: center;	
margin-top: 60px;
}

#article {
    font-family: Arial, Helvetica, sans-serif;
    padding: 0 10% 0;
}