body{
margin:0;
font-family:Arial, Helvetica, sans-serif;
background:linear-gradient(135deg,#0f172a,#1e3a8a,#2563eb);
background-size:400% 400%;
animation:bgMove 12s infinite alternate;
color:white;
text-align:center;
}

@keyframes bgMove{
0%{background-position:left}
100%{background-position:right}
}

header{
padding:80px 20px;
}

.logo{
width:180px;
border-radius:100%;
box-shadow:0 0 40px rgba(88,101,242,.6);
margin-bottom:20px;
}

h1{
font-size:48px;
margin:10px 0;
}

.subtitle{
color:#cbd5f5;
font-size:18px;
}

.version{
margin-top:10px;
font-size:14px;
color:#94a3b8;
}

.buttons{
margin-top:30px;
}

.btn{
padding:14px 28px;
margin:8px;
border-radius:8px;
border:none;
cursor:pointer;
font-size:16px;
background:#334155;
color:white;
transition:all .2s ease;
}

.btn:hover{
transform:scale(1.05);
}

.primary{
background:#5865F2;
}

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

.features h2{
margin-bottom:20px;
}

.grid{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
gap:20px;
margin-top:40px;
}

.card{
background:#1e293b;
padding:25px;
border-radius:12px;
box-shadow:0 10px 20px rgba(0,0,0,.4);
}

.card h3{
margin-top:0;
}

footer{
padding:40px;
color:#94a3b8;
}

/* POPUP SYSTEM */

.popup{
display:none;
position:fixed;
top:0;
left:0;
width:100%;
height:100%;
background:rgba(0,0,0,.7);
align-items:center;
justify-content:center;
z-index:1000;
}

.popup-content{
background:#0f172a;
padding:40px;
border-radius:12px;
text-align:center;
max-width:350px;
box-shadow:0 10px 30px rgba(0,0,0,.6);
}

.popup-content h2{
margin-top:0;
}

.popup-content button{
margin-top:20px;
background:#5865F2;
padding:10px 20px;
border:none;
border-radius:6px;
color:white;
cursor:pointer;
}

.popup-content button:hover{
opacity:.9;
}