/* ===== COMPONENT STYLES ===== */

/* --- Metrics Card --- */
.metrics-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}
.metrics-card:hover {
    border-color: var(--border-color-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.metrics-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.metrics-card.blue::before { background: var(--gradient-primary); }
.metrics-card.green::before { background: var(--gradient-success); }
.metrics-card.red::before { background: var(--gradient-danger); }
.metrics-card.orange::before { background: var(--gradient-warning); }

.metrics-card .card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-md);
}
.metrics-card .card-label {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.metrics-card .card-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-lg);
}
.metrics-card .card-icon.blue { background: rgba(0, 212, 255, 0.12); color: var(--accent-blue); }
.metrics-card .card-icon.green { background: rgba(0, 230, 118, 0.12); color: var(--accent-green); }
.metrics-card .card-icon.red { background: rgba(255, 71, 87, 0.12); color: var(--accent-red); }
.metrics-card .card-icon.orange { background: rgba(255, 145, 0, 0.12); color: var(--accent-orange); }

.metrics-card .card-value {
    font-size: var(--font-2xl);
    font-weight: 700;
    margin-bottom: var(--space-xs);
    line-height: 1.2;
}
.metrics-card .card-unit {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    font-weight: 400;
}
.metrics-card .card-trend {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-sm);
    font-weight: 500;
    margin-top: var(--space-sm);
}
.metrics-card .card-trend.up { color: var(--accent-green); }
.metrics-card .card-trend.down { color: var(--accent-red); }
.metrics-card .card-trend.stable { color: var(--text-secondary); }

/* --- Status Badge --- */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: var(--font-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.status-badge.online {
    background: rgba(0, 230, 118, 0.12);
    color: var(--accent-green);
    border: 1px solid rgba(0, 230, 118, 0.25);
}
.status-badge.offline {
    background: rgba(255, 71, 87, 0.12);
    color: var(--accent-red);
    border: 1px solid rgba(255, 71, 87, 0.25);
}
.status-badge.warning {
    background: rgba(255, 145, 0, 0.12);
    color: var(--accent-orange);
    border: 1px solid rgba(255, 145, 0, 0.25);
}
.status-badge .status-indicator {
    width: 7px;
    height: 7px;
    border-radius: var(--radius-full);
}
.status-badge.online .status-indicator {
    background: var(--accent-green);
    box-shadow: 0 0 6px var(--accent-green);
    animation: pulse 2s infinite;
}
.status-badge.offline .status-indicator { background: var(--accent-red); }
.status-badge.warning .status-indicator {
    background: var(--accent-orange);
    animation: pulse 1.5s infinite;
}

/* --- Data Table --- */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-sm);
}
.data-table thead th {
    text-align: left;
    padding: var(--space-md);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: var(--font-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
}
.data-table tbody td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}
.data-table tbody tr:hover td {
    background: var(--bg-card-hover);
}
.data-table .mono {
    font-family: 'JetBrains Mono', monospace;
    font-size: var(--font-xs);
    color: var(--accent-blue);
}

/* --- Card / Panel --- */
.panel {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}
.panel-title {
    font-size: var(--font-md);
    font-weight: 600;
}
.panel-body {
    padding: var(--space-lg);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: var(--font-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}
.btn-primary {
    background: var(--gradient-primary);
    color: white;
}
.btn-primary:hover {
    opacity: 0.9;
    box-shadow: var(--shadow-glow-blue);
}
.btn-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}
.btn-icon:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

/* --- Chart Container --- */
.chart-container {
    position: relative;
    width: 100%;
    height: 200px;
}
.chart-canvas {
    width: 100%;
    height: 100%;
}

/* --- Progress Bar --- */
.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-input);
    border-radius: 3px;
    overflow: hidden;
}
.progress-bar .progress-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.8s ease;
}
.progress-bar .progress-fill.green { background: var(--gradient-success); }
.progress-bar .progress-fill.blue { background: var(--gradient-primary); }
.progress-bar .progress-fill.orange { background: var(--gradient-warning); }
.progress-bar .progress-fill.red { background: var(--gradient-danger); }

/* --- Alert Item --- */
.alert-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}
.alert-item:hover {
    background: var(--bg-card-hover);
}
.alert-item:last-child {
    border-bottom: none;
}
.alert-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: var(--font-md);
}
.alert-icon.critical { background: rgba(255, 71, 87, 0.12); color: var(--accent-red); }
.alert-icon.warning { background: rgba(255, 145, 0, 0.12); color: var(--accent-orange); }
.alert-icon.info { background: rgba(0, 212, 255, 0.12); color: var(--accent-blue); }
.alert-content {
    flex: 1;
}
.alert-title {
    font-weight: 600;
    font-size: var(--font-sm);
    margin-bottom: 2px;
}
.alert-desc {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    line-height: 1.5;
}
.alert-time {
    font-size: var(--font-xs);
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

/* --- Topology Node --- */
.topology-container {
    position: relative;
    width: 100%;
    min-height: 350px;
    overflow: hidden;
}
.topology-node {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    transition: transform var(--transition-base);
}
.topology-node:hover {
    transform: scale(1.08);
}
.topology-node .node-circle {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-xs);
    border: 2px solid;
    position: relative;
}
.topology-node .node-circle.online {
    border-color: var(--accent-green);
    background: rgba(0, 230, 118, 0.08);
    color: var(--accent-green);
    box-shadow: var(--shadow-glow-green);
}
.topology-node .node-circle.offline {
    border-color: var(--accent-red);
    background: rgba(255, 71, 87, 0.08);
    color: var(--accent-red);
    box-shadow: var(--shadow-glow-red);
}
.topology-node .node-circle.warning {
    border-color: var(--accent-orange);
    background: rgba(255, 145, 0, 0.08);
    color: var(--accent-orange);
}
.topology-node .node-label {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    font-weight: 500;
    text-align: center;
}
.topology-node .node-ip {
    font-size: 9px;
    color: var(--text-muted);
    font-family: monospace;
}