* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            min-height: 100vh;
            padding: 20px;
        }
        
        .container {
            max-width: 1400px;
            margin: 0 auto;
        }
        
        h1 {
            color: white;
            text-align: center;
            margin-bottom: 30px;
            font-size: 2.5em;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        
        .refresh-info {
            color: white;
            text-align: center;
            margin-bottom: 20px;
            font-size: 1.1em;
            background: rgba(255,255,255,0.2);
            padding: 10px;
            border-radius: 10px;
            backdrop-filter: blur(10px);
        }
        
        .devices-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .device-card {
            background: white;
            border-radius: 20px;
            padding: 15px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            transition: transform 0.3s;
        }
        
        .device-card:hover {
            transform: translateY(-5px);
        }
        
        .device-card.offline-card {
            opacity: 0.8;
            background: #f8f9fa;
        }
        
        .device-header {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 2px solid #f0f0f0;
        }
        
        .device-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
            font-weight: bold;
        }
        
        .device-info {
            flex: 1;
        }
        
        .device-name {
            font-size: 1.3em;
            font-weight: bold;
            color: #333;
            margin-bottom: 5px;
        }
        
        .device-id {
            font-size: 0.9em;
            color: #999;
            font-family: monospace;
        }
        
        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.9em;
            font-weight: bold;
        }
        
        .status-badge.status-online {
            background-color: #d4edda;
            color: #155724;
        }
        
        .status-badge.status-offline {
            background-color: #f8d7da;
            color: #721c24;
        }
        
        .status-indicator {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
        }
        
        .status-indicator.status-online {
            background-color: #4CAF50;
            box-shadow: 0 0 10px #4CAF50;
        }
        
        .status-indicator.status-offline {
            background-color: #f44336;
        }
        
        .temperature-display {
            text-align: center;
            padding: 20px;
            background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
            border-radius: 15px;
            margin-bottom: 20px;
        }
        
        .temp-value {
            font-size: 5em;
            font-weight: bold;
            line-height: 1;
        }
        
        .temp-unit {
            font-size: 1.5em;
            color: #666;
            margin-left: 10px;
        }
        
        .temp-f {
            font-size: 1.5em;
            color: #666;
            margin-top: 5px;
        }
        
        .temp-range {
            color: #666;
            margin-top: 10px;
            font-size: 1.1em;
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin-top: 20px;
        }
        
        .stat-item {
            background: #f8f9fa;
            padding: 15px;
            border-radius: 10px;
            text-align: center;
        }
        
        .stat-label {
            font-size: 0.9em;
            color: #666;
            margin-bottom: 5px;
        }
        
        .stat-value {
            font-size: 1.4em;
            font-weight: bold;
            color: #333;
        }
        
        .last-seen {
            font-size: 0.9em;
            color: #666;
            margin-top: 15px;
            padding: 10px;
            background: #f8f9fa;
            border-radius: 8px;
            text-align: center;
            border-left: 3px solid #667eea;
        }
        
        .offline-message {
            text-align: center;
            padding: 30px;
            color: #999;
            background: #f8f9fa;
            border-radius: 10px;
            margin: 20px 0;
        }
        
        .offline-icon {
            font-size: 3em;
            margin-bottom: 10px;
            opacity: 0.5;
        }
        
        .warning-banner {
            background: #fff3cd;
            color: #856404;
            padding: 15px;
            border-radius: 10px;
            margin-bottom: 30px;
            text-align: center;
            border-left: 4px solid #ffc107;
            font-weight: bold;
            font-size: 1.1em;
        }
        
        .chart-container {
            background: white;
            border-radius: 20px;
            padding: 25px;
            margin-top: 30px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
        }
        
        .chart-title {
            font-size: 1.3em;
            font-weight: bold;
            color: #333;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #f0f0f0;
        }
        
        .comparison-table {
            background: white;
            border-radius: 20px;
            padding: 25px;
            margin-top: 30px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
        }
        
        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 15px;
        }
        
        th {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            padding: 15px;
            font-weight: normal;
            font-size: 1.1em;
        }
        
        th:first-child {
            border-radius: 10px 0 0 0;
        }
        
        th:last-child {
            border-radius: 0 10px 0 0;
        }
        
        td {
            padding: 15px;
            text-align: center;
            border-bottom: 1px solid #f0f0f0;
        }
        
        tr:last-child td {
            border-bottom: none;
        }
        
        tr:hover td {
            background: #f8f9fa;
        }
        
        .winner {
            font-weight: bold;
            color: #27ae60;
        }
        
        .status-summary {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 20px;
        }
        
        .status-card {
            background: white;
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
        }
        
        .status-card h3 {
            color: #333;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid #f0f0f0;
        }
        
        .status-card p {
            margin: 10px 0;
            color: #666;
        }
        
        .footer {
            text-align: center;
            margin-top: 30px;
            color: white;
            font-size: 0.9em;
            background: rgba(0,0,0,0.2);
            padding: 15px;
            border-radius: 10px;
        }
        
        @media (max-width: 768px) {
            .devices-container {
                grid-template-columns: 1fr;
            }
            
            .temp-value {
                font-size: 3.5em;
            }
            
            .status-summary {
                grid-template-columns: 1fr;
            }
            
            table {
                font-size: 0.9em;
            }
            
            th, td {
                padding: 10px;
            }
        }
        
        /* Animation for online indicator */
        @keyframes pulse {
            0% { transform: scale(1); opacity: 1; }
            50% { transform: scale(1.2); opacity: 0.7; }
            100% { transform: scale(1); opacity: 1; }
        }
        
        .status-online .status-indicator {
            animation: pulse 2s infinite;
        }