*{margin:0;padding:0;box-sizing:border-box}
body{
font-family:Arial,sans-serif;
min-height:100vh;
display:flex;
justify-content:center;
align-items:center;
background:linear-gradient(135deg,#0f172a,#1e3a8a);
padding:20px;
}
.card{
background:#fff;
padding:40px;
border-radius:20px;
text-align:center;
max-width:600px;
width:100%;
box-shadow:0 10px 30px rgba(0,0,0,.2);
}
h1{font-size:3rem;color:#1e3a8a}
.tagline{color:#666;margin:10px 0 20px}
h2{font-size:2rem;margin-bottom:15px}
p{line-height:1.6}
.btn{
display:inline-block;
margin-top:20px;
padding:12px 24px;
background:#1e3a8a;
color:#fff;
text-decoration:none;
border-radius:8px;
}
@media(max-width:600px){
h1{font-size:2.2rem}
h2{font-size:1.6rem}
.card{padding:25px}
}