body {
    margin:0;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg,#0f2027,#203a43,#2c5364);
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    height:100vh;
    text-align:center;
}
.card {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    padding:30px;
    border-radius:16px;
    max-width:350px;
    box-shadow:0 10px 30px rgba(0,0,0,0.3);
}
h1 {
    font-size:22px;
    margin-bottom:10px;
}
p {
    font-size:14px;
    opacity:0.9;
}
.btn {
    display:inline-block;
    margin-top:20px;
    padding:12px 20px;
    background:#00c6ff;
    color:#fff;
    border-radius:8px;
    text-decoration:none;
    font-weight:bold;
    transition:0.3s;
}
.btn:hover {
    background:#0072ff;
}