body{
display:flex;
justify-content:center;
align-items:center;
height:100vh;
font-family:Arial;
background:#f5f5f5;
}

.box{
background:white;
padding:30px;
text-align:center;
border-radius:10px;
box-shadow:0 5px 10px rgba(0,0,0,.2);
}

button{
padding:10px 20px;
background:#007bff;
color:white;
border:none;
border-radius:6px;
cursor:pointer;
}