/* Charts placeholder */
        .chart-panel {
            grid-column: span 6;
            height: 450px;
            display: flex;
            flex-direction: column;
        }

        .chart-panel canvas {
            flex: 1;
            max-height: 380px;
        }

        /* Production Heatmap */
        .heatmap-container {
            flex: 1;
            overflow-y: auto;
            max-height: 380px;
        }

        .heatmap-container::-webkit-scrollbar {
            width: 8px;
        }

        .heatmap-container::-webkit-scrollbar-track {
            background: rgba(0, 0, 0, 0.3);
        }

        .heatmap-container::-webkit-scrollbar-thumb {
            background: var(--accent-cyan);
            border-radius: 4px;
        }

        .enterprise-group {
            margin-bottom: 20px;
        }

        .enterprise-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 15px;
            background: rgba(0, 255, 255, 0.1);
            border-left: 4px solid var(--accent-cyan);
            border-radius: 4px;
            margin-bottom: 10px;
            font-family: 'Orbitron', sans-serif;
            font-weight: 700;
        }

        .enterprise-header.healthy {
            background: rgba(0, 255, 136, 0.1);
            border-left-color: var(--accent-green);
        }

        .enterprise-header.warning {
            background: rgba(255, 191, 0, 0.1);
            border-left-color: var(--accent-amber);
        }

        .enterprise-header.critical {
            background: rgba(255, 51, 102, 0.1);
            border-left-color: var(--accent-red);
        }

        .enterprise-name {
            font-size: 1rem;
            color: var(--text-primary);
        }

        .enterprise-oee {
            font-family: 'Share Tech Mono', monospace;
            font-size: 1.1rem;
            font-weight: 700;
        }

        .enterprise-oee.healthy {
            color: var(--accent-green);
        }

        .enterprise-oee.warning {
            color: var(--accent-amber);
        }

        .enterprise-oee.critical {
            color: var(--accent-red);
        }

        .sites-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 10px;
            padding-left: 20px;
        }

        .site-card {
            padding: 12px;
            background: rgba(0, 0, 0, 0.3);
            border: 2px solid;
            border-radius: 6px;
            transition: all 0.3s ease;
        }

        .site-card.healthy {
            border-color: var(--accent-green);
            background: rgba(0, 255, 136, 0.05);
        }

        .site-card.warning {
            border-color: var(--accent-amber);
            background: rgba(255, 191, 0, 0.05);
        }

        .site-card.critical {
            border-color: var(--accent-red);
            background: rgba(255, 51, 102, 0.05);
        }

        .site-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 255, 255, 0.3);
        }

        .site-name {
            font-family: 'Rajdhani', sans-serif;
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .site-oee {
            font-family: 'Share Tech Mono', monospace;
            font-size: 1.3rem;
            font-weight: 900;
        }

        .site-oee.healthy {
            color: var(--accent-green);
        }

        .site-oee.warning {
            color: var(--accent-amber);
        }

        .site-oee.critical {
            color: var(--accent-red);
        }

        .site-status {
            font-size: 0.75rem;
            color: var(--text-dim);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-top: 4px;
        }

        .heatmap-loading {
            display: flex;
            align-items: center;
            justify-content: center;
            height: 200px;
            font-family: 'Share Tech Mono', monospace;
            color: var(--text-dim);
        }

        .chart-placeholder {
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.3);
            border: 1px dashed rgba(0, 255, 255, 0.3);
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 15px;
        }

        .chart-icon {
            font-size: 3rem;
            color: var(--accent-cyan);
            opacity: 0.5;
        }

        .chart-label {
            font-family: 'Share Tech Mono', monospace;
            font-size: 0.9rem;
            color: var(--text-dim);
            text-transform: uppercase;
        }

        /* Connection Status */