body{
font-family: Arial, sans-serif;
background:#f4f6fb;
text-align:center;
padding:60px;
}

.container{
max-width:600px;
margin:auto;
background:white;
padding:40px;
border-radius:12px;
box-shadow:0 0 15px rgba(0,0,0,0.08);
}

h1{
margin-bottom:20px;
}

.desc{
margin-bottom:30px;
}

.join-btn{
display:inline-block;
padding:14px 26px;
background:#2f8f2f;
color:white;
text-decoration:none;
border-radius:8px;
font-weight:bold;
}

.join-btn:hover{
opacity:0.9;
}