body{
font-family:Arial,sans-serif;
background:#f4f4f4;
margin:0;
}
.container{
max-width:900px;
margin:50px auto;
background:#fff;
padding:40px;
border-radius:10px;
box-shadow:0 2px 10px rgba(0,0,0,.1);
}
h1{color:#222;}
h2{margin-top:30px;}
.btn{
display:inline-block;
background:#0d6efd;
color:#fff;
padding:12px 20px;
text-decoration:none;
border-radius:6px;
}
.btn:hover{opacity:.9;}