body {
    font-family: Arial, sans-serif;
    background: #111;
    color: #eee;
    margin: 0;
}

header {
    background: #222;
    padding: 15px;
}

.container {
    padding: 20px;
}

.panel {
    background: #1a1a1a;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
}

.actions button {
    margin-right: 8px;
    margin-bottom: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

td, th {
    border: 1px solid #333;
    padding: 6px;
    font-size: 13px;
}

.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
}

.device-card {
    background: #1a1a1a;
    padding: 14px;
    border-radius: 8px;
}