body{
font-family:Arial, sans-serif;
background:#f5f7fb;
text-align:center;
padding:60px;
}

.container{
max-width:600px;
margin:auto;
background:white;
padding:40px;
border-radius:10px;
box-shadow:0 0 10px rgba(0,0,0,0.1);
}

h1{
margin-bottom:30px;
}

.code-box{
font-size:28px;
margin:20px 0;
}

button{
margin-left:10px;
padding:10px 15px;
cursor:pointer;
}