* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.dashboard-container {
    max-width: 1920px;
    margin: 0 auto;
    padding: 20px;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.dashboard-header h1 {
    font-size: 28px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
}

.dashboard-header h1 i {
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.last-update {
    color: var(--text-secondary);
    font-size: 14px;
}

.btn-refresh,
.btn-network-scanner {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
    text-decoration: none;
}

.btn-refresh:hover,
.btn-network-scanner:hover {
    background: #1d4ed8;
}

.btn-refresh i {
    animation: none;
}

.btn-refresh.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 12px -2px rgba(0, 0, 0, 0.4);
}

.stat-icon {
    font-size: 48px;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(37, 99, 235, 0.1);
}

.stat-total .stat-icon { color: var(--info-color); }
.stat-online .stat-icon { color: var(--success-color); }
.stat-warning .stat-icon { color: var(--warning-color); }
.stat-offline .stat-icon { color: var(--danger-color); }

.stat-content {
    flex: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
}

.main-content {
    margin-bottom: 30px;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(600px, 1fr));
    gap: 20px;
}

.monitoring-section {
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(37, 99, 235, 0.05);
}

.section-header h2 {
    font-size: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-header h2 i {
    color: var(--primary-color);
}

.section-count {
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.section-content {
    padding: 20px;
    min-height: 200px;
}

.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.system-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
    transition: all 0.2s;
}

.system-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary-color);
}

.system-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.system-name {
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.status-online {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.status-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-color);
}

.status-offline {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

.status-unknown {
    background: rgba(148, 163, 184, 0.2);
    color: var(--text-secondary);
}

.system-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    text-transform: uppercase;
}

.info-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-fill {
    height: 100%;
    background: var(--primary-color);
    transition: width 0.3s;
}

.progress-fill.warning {
    background: var(--warning-color);
}

.progress-fill.danger {
    background: var(--danger-color);
}

.alerts-panel {
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.alerts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
}

.alerts-header h3 {
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
    transition: transform 0.3s;
}

.alerts-content {
    padding: 20px;
    max-height: 400px;
    overflow-y: auto;
}

.alerts-content.collapsed {
    display: none;
}

.alert-item {
    padding: 12px;
    border-left: 4px solid;
    border-radius: 4px;
    margin-bottom: 12px;
    background: rgba(255, 255, 255, 0.03);
}

.alert-item.info {
    border-color: var(--info-color);
}

.alert-item.warning {
    border-color: var(--warning-color);
}

.alert-item.critical {
    border-color: var(--danger-color);
}

.alert-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.alert-message {
    font-size: 14px;
    color: var(--text-secondary);
}

.alert-time {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

@media (max-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
}