body{
margin:0;
font-family:Arial;
background:#0a1020;
color:#fff;
}

body::before{
content:"";
position:fixed;
inset:0;
background:
radial-gradient(circle at 20% 20%, rgba(77,163,255,0.12), transparent 40%),
radial-gradient(circle at 80% 80%, rgba(120,120,255,0.10), transparent 40%);
z-index:-1;
}

header{
display:flex;
justify-content:space-between;
align-items:center;
padding:15px 30px;
background:rgba(10,16,32,0.7);
backdrop-filter:blur(12px);
position:sticky;
top:0;
border-bottom:1px solid rgba(255,255,255,0.05);
}

nav a{
color:#fff;
margin:0 10px;
text-decoration:none;
opacity:0.8;
}

nav a:hover{
color:#4da3ff;
}

.logo{
color:#4da3ff;
font-weight:bold;
font-size:20px;
}

.container{
max-width:1000px;
margin:auto;
padding:60px 20px;
}

.card{
background:rgba(255,255,255,0.04);
padding:20px;
border-radius:12px;
margin:15px 0;
backdrop-filter:blur(10px);
}

.btn{
background:#4da3ff;
border:none;
padding:12px 18px;
border-radius:8px;
cursor:pointer;
}

footer{
text-align:center;
padding:30px;
opacity:0.6;
}