:root {
    --primary-color: #006FFF;
    --secondary-color: #00439C;
    --background-color: #f8f9fa;
    --card-background: #ffffff;
    --text-color: #2c3e50;
    --border-radius: 12px;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 30px;
}

.metrics-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.metric-card {
    background: var(--card-background);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
    transition: transform 0.2s ease;
}

.metric-card:hover {
    transform: translateY(-5px);
}

.device-status {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 10px 0;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.status-up {
    background-color: #10B981;
}

.status-down {
    background-color: #EF4444;
}

.diagnostics-panel {
    margin-top: 15px;
}

.diagnostic-item {
    padding: 10px;
    border-left: 4px solid var(--primary-color);
    margin: 10px 0;
    background: rgba(0,111,255,0.1);
}

.fiber-diagnostic {
    border-color: #10B981;
}

.copper-diagnostic {
    border-color: #F59E0B;
}