*{margin:0;padding:0;box-sizing:border-box}
body{
min-height:100vh;
display:flex;
justify-content:center;
align-items:center;
font-family:Arial,Helvetica,sans-serif;
background:
linear-gradient(rgba(0,0,0,.45),rgba(0,0,0,.55)),
url('../images/machu-picchu.jpg') center center/cover no-repeat fixed;
color:#fff;
padding:20px;
}
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.1)}
.card{
position:relative;
z-index:1;
max-width:720px;
width:100%;
text-align:center;
background:rgba(255,255,255,.14);
backdrop-filter:blur(8px);
padding:50px 35px;
border-radius:18px;
border:1px solid rgba(255,255,255,.3);
box-shadow:0 10px 35px rgba(0,0,0,.35)
}
h1{font-size:clamp(2rem,5vw,3.2rem);margin-bottom:20px}
p{font-size:clamp(1rem,2.5vw,1.2rem);line-height:1.7;margin-bottom:16px}
.btn{
display:inline-block;
margin:18px 0 28px;
padding:14px 34px;
border-radius:40px;
background:#1d4ed8;
color:#fff;
text-decoration:none;
font-weight:bold;
}
footer{opacity:.9;font-size:.95rem}
@media(max-width:768px){
.card{padding:35px 22px}
body{background-attachment:scroll;}
}