body{
font-family:Arial;
background:#f5f5f5;
}

.box{
width:420px;
margin:120px auto;
background:white;
padding:40px;
border-radius:20px;
text-align:center;
box-shadow:0 5px 15px rgba(0,0,0,0.1);
}

button{
background:#06c755;
color:white;
border:none;
padding:15px 30px;
font-size:18px;
border-radius:12px;
cursor:pointer;
}