:root {
    --bg-primary: #1e1e1e;
    --bg-secondary: #2d2d2d;
    --bg-card: #252525;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --accent-info: #00ccff;
    --accent-warning: #ffcc00;
    --accent-danger: #ff3366;
    --accent-success: #00ff88;
}



body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.2);
}

.metric-card {
    min-height: 200px;
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    margin: 0.5rem 0;
}

.metric-unit {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.alert-critical {
    border-left: 4px solid var(--accent-danger);
    background-color: rgba(255, 51, 102, 0.1);
}

.alert-warning {
    border-left: 4px solid var(--accent-warning);
    background-color: rgba(255, 204, 0, 0.1);
}

.status-online {
    color: var(--accent-success);
}

.status-offline {
    color: var(--accent-danger);
}

.progress {
    background-color: rgba(255, 255, 255, 0.1);
}

.table {
    color: var(--text-primary);
}

.table td {
    border-color: rgba(255, 255, 255, 0.1);
}

.navbar {
    background-color: var(--bg-secondary) !important;
}

.card-header {
    background-color: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-weight: 600;
}

canvas {
    max-height: 300px;
}

/* Responsive */
@media (max-width: 768px) {
    .metric-value {
        font-size: 2rem;
    }
    
    .metric-card {
        min-height: 150px;
    }
}