body{
font-family:Arial;
background:#0a0a0a;
color:white;
margin:0;
}

.nav{
display:flex;
justify-content:space-between;
padding:20px;
background:#111;
}

.nav a{
margin-left:20px;
color:white;
text-decoration:none;
}

.hero{
text-align:center;
padding:80px;
}

.grid{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
gap:30px;
padding:40px;
}

.card{
background:#151515;
padding:20px;
border-radius:10px;
}

.page-title{
padding:40px;
text-align:center;
}

#viewer{
height:400px;
}