body{
    margin:0;
    font-family:Arial;
    background:#0f172a;
    color:white;
}

.topbar{
    background:#111827;
    padding:20px;
}

.grid{
    display:grid;
    grid-template-columns:repeat(5,1fr);
    gap:15px;
    padding:20px;
}

.card{
    background:#1e293b;
    border-radius:12px;
    padding:10px;
    text-align:center;
}

.card img{
    width:100%;
    border-radius:8px;
}

.active{
    border:2px solid #22c55e;
}

.idle{
    border:2px solid #facc15;
}

.offline{
    border:2px solid #ef4444;
}