/* netsim Topology Visualization Styles */

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #eee;
    --text-secondary: #aaa;
    --accent: #e94560;
    --accent-secondary: #0f9b8e;
    --link-up: #4ade80;
    --link-down: #f87171;

    /* Role colors */
    --role-spine: #818cf8;
    --role-leaf: #34d399;
    --role-border: #f472b6;
    --role-core: #60a5fa;
    --role-edge: #a78bfa;
    --role-hub: #fbbf24;
    --role-branch: #fb923c;
    --role-router: #94a3b8;

    /* Platform styles */
    --platform-nxos: 8px;
    --platform-ios-xe: 0px;
    --platform-ios: 4px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
header {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 1rem;
    height: 42px;
    background: var(--bg-secondary);
    border-bottom: 1px solid rgba(71, 85, 105, 0.3);
    gap: 0.5rem;
}

.controls {
    display: flex;
    gap: 0.375rem;
    align-items: center;
}

/* Control group separator - subtle vertical divider */
.control-group {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0 0.5rem;
    position: relative;
}

.control-group:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 20px;
    background: linear-gradient(180deg, transparent 0%, rgba(71, 85, 105, 0.5) 50%, transparent 100%);
}

.view-toggle {
    display: flex;
    gap: 1px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 5px;
    padding: 2px;
}

/* Zoom controls - floating overlay on canvas */
.zoom-controls-overlay {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    display: flex;
    gap: 1px;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(8px);
    border-radius: 6px;
    padding: 3px;
    border: 1px solid rgba(71, 85, 105, 0.3);
    z-index: 100;
}

.zoom-controls-overlay button {
    padding: 0.4rem 0.6rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 0.75rem;
    font-weight: 500;
    min-width: 36px;
}

.zoom-controls-overlay button:first-child {
    border-radius: 4px 0 0 4px;
}

.zoom-controls-overlay button:last-child {
    border-radius: 0 4px 4px 0;
}

.zoom-controls-overlay button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.view-toggle button, .zoom-controls button {
    padding: 0.3rem 0.6rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 0.7rem;
    font-weight: 500;
}

.view-toggle button:first-child {
    border-radius: 4px 0 0 4px;
}

.view-toggle button:last-child {
    border-radius: 0 4px 4px 0;
}

.view-toggle button.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.view-toggle button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.view-toggle button:not(:disabled):not(.active):hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* Main content */
main {
    flex: 1;
    display: flex;
    position: relative;
    overflow: hidden;
}

#topology-container {
    flex: 1;
    position: relative;
}

#topology-svg {
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
}

/* Details panel */
#details-panel {
    position: absolute;
    right: 0;
    top: 0;
    width: 350px;
    height: 100%;
    background: var(--bg-secondary);
    border-left: 1px solid var(--bg-tertiary);
    padding: 1rem;
    overflow-y: auto;
    transition: transform 0.3s;
    z-index: 100;
}

#details-panel.hidden {
    transform: translateX(100%);
}

.close-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    line-height: 1;
}

.close-btn:hover {
    color: var(--text-primary);
}

#panel-content h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    padding-right: 2rem;
}

#panel-content .device-info {
    margin-bottom: 1.5rem;
}

#panel-content .info-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--bg-tertiary);
}

#panel-content .info-label {
    color: var(--text-secondary);
}

#panel-content .info-value {
    font-family: 'SF Mono', Monaco, monospace;
}

#panel-content .protocols {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

#panel-content h3 {
    font-size: 1rem;
    margin: 1rem 0 0.5rem;
    color: var(--text-secondary);
}

#panel-content .collapsible-header {
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#panel-content .collapsible-header:hover {
    color: var(--text-primary);
}

#panel-content .collapse-icon {
    font-size: 0.7rem;
    transition: transform 0.2s;
}

#panel-content .collapsible-content {
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    max-height: 2000px;
}

#panel-content .collapsible-content.collapsed {
    max-height: 0;
    margin: 0;
    padding: 0;
}

#panel-content .interface-list {
    font-size: 0.875rem;
}

#panel-content .interface-item {
    padding: 0.5rem;
    margin-bottom: 0.25rem;
    background: var(--bg-primary);
    border-radius: 4px;
}

#panel-content .intf-name {
    font-family: 'SF Mono', Monaco, monospace;
    font-weight: 500;
}

#panel-content .intf-ip {
    color: var(--accent-secondary);
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.8rem;
}

#panel-content .intf-peer {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

#panel-content .intf-state {
    display: inline-block;
    padding: 0.125rem 0.375rem;
    border-radius: 3px;
    font-size: 0.75rem;
    margin-left: 0.5rem;
}

#panel-content .intf-state.up {
    background: rgba(74, 222, 128, 0.2);
    color: var(--link-up);
}

#panel-content .intf-state.down {
    background: rgba(248, 113, 113, 0.2);
    color: var(--link-down);
}

#panel-content .intf-state.admin-down {
    background: rgba(148, 163, 184, 0.2);
    color: var(--text-secondary);
}

/* Route List Styles */
#panel-content .route-list {
    font-size: 0.875rem;
    max-height: 300px;
    overflow-y: auto;
}

#panel-content .route-item {
    padding: 0.4rem 0.5rem;
    margin-bottom: 0.25rem;
    background: var(--bg-primary);
    border-radius: 4px;
}

#panel-content .route-prefix {
    font-family: 'SF Mono', Monaco, monospace;
    font-weight: 500;
    color: var(--text-primary);
}

#panel-content .route-details {
    display: flex;
    gap: 0.5rem;
    font-size: 0.8rem;
    margin-top: 0.2rem;
    flex-wrap: wrap;
}

#panel-content .route-protocol {
    display: inline-block;
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    font-size: 0.7rem;
    text-transform: uppercase;
}

#panel-content .route-protocol.connected {
    background: rgba(74, 222, 128, 0.2);
    color: #4ade80;
}

#panel-content .route-protocol.eigrp {
    background: rgba(96, 165, 250, 0.2);
    color: #60a5fa;
}

#panel-content .route-protocol.bgp {
    background: rgba(244, 114, 182, 0.2);
    color: #f472b6;
}

#panel-content .route-protocol.static {
    background: rgba(148, 163, 184, 0.2);
    color: #94a3b8;
}

#panel-content .route-nexthop {
    color: var(--accent-secondary);
    font-family: 'SF Mono', Monaco, monospace;
}

#panel-content .route-interface {
    color: var(--text-secondary);
    font-family: 'SF Mono', Monaco, monospace;
}

/* L2 View VLAN Panel Styles */
#panel-content .vlan-list-panel {
    font-size: 0.875rem;
}

#panel-content .vlan-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    margin-bottom: 0.25rem;
    background: var(--bg-primary);
    border-radius: 4px;
    flex-wrap: wrap;
}

#panel-content .vlan-id {
    font-family: 'SF Mono', Monaco, monospace;
    font-weight: 600;
    color: #fbbf24;
    min-width: 70px;
}

#panel-content .vlan-name {
    color: var(--text-secondary);
    flex: 1;
}

#panel-content .svi-badge {
    background: rgba(52, 211, 153, 0.3);
    color: #34d399;
    padding: 0.125rem 0.375rem;
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: 600;
}

#panel-content .svi-ip {
    font-family: 'SF Mono', Monaco, monospace;
    color: var(--accent-secondary);
    font-size: 0.8rem;
}

#panel-content .no-vlans {
    color: var(--text-secondary);
    padding: 0.5rem;
    text-align: center;
}

/* Footer / Legend */
footer {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 2rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--bg-tertiary);
    font-size: 0.875rem;
}

.legend {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.legend-title {
    color: var(--text-secondary);
    margin-right: 0.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Convergence indicator in footer */
.convergence-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    background: rgba(251, 191, 36, 0.15);
    border-radius: 4px;
    font-size: 0.75rem;
}

.convergence-indicator.hidden {
    display: none;
}

.convergence-indicator-spinner {
    width: 12px;
    height: 12px;
    border: 2px solid rgba(251, 191, 36, 0.3);
    border-top-color: #fbbf24;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.convergence-indicator-text {
    color: #fbbf24;
}

.convergence-indicator-pct {
    color: var(--text-secondary);
    font-family: 'SF Mono', Monaco, monospace;
}

.role-icon {
    width: 16px;
    height: 16px;
    display: inline-block;
}

.role-icon.spine {
    background: var(--role-spine);
    border-radius: 2px;
}

.role-icon.leaf {
    background: var(--role-leaf);
    border-radius: 8px;
}

.role-icon.border {
    background: var(--role-border);
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.role-icon.core {
    background: var(--role-core);
    border-radius: 4px;
}

.role-icon.router {
    background: var(--role-router);
    border-radius: 50%;
}

/* L2 Legend Link Icons */
.link-icon {
    width: 24px;
    height: 4px;
    display: inline-block;
    vertical-align: middle;
    margin-right: 4px;
}

.link-icon.trunk {
    background: repeating-linear-gradient(
        90deg,
        #fbbf24 0px,
        #fbbf24 8px,
        transparent 8px,
        transparent 12px
    );
    height: 4px;
}

.link-icon.access {
    background: #34d399;
    height: 2px;
}

.link-icon.routed {
    background: #6b7280;
    height: 1px;
    opacity: 0.6;
}

/* Protocol badges */
.protocol-badge {
    display: inline-block;
    padding: 0.125rem 0.375rem;
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: 0.25rem;
}

.protocol-badge.bgp {
    background: rgba(129, 140, 248, 0.3);
    color: #818cf8;
}

.protocol-badge.eigrp {
    background: rgba(251, 191, 36, 0.3);
    color: #fbbf24;
}

.protocol-badge.evpn {
    background: rgba(244, 114, 182, 0.3);
    color: #f472b6;
}

.protocol-badge.ospf {
    background: rgba(34, 211, 211, 0.3);
    color: #22d3d3;
}

.protocol-badge.isis {
    background: rgba(168, 85, 247, 0.3);
    color: #a855f7;
}

/* D3 Nodes */
.node {
    cursor: pointer;
}

.node:hover .node-shape {
    stroke-width: 3px;
    stroke: var(--text-primary);
}

.node-label {
    font-size: 11px;
    fill: var(--text-primary);
    text-anchor: middle;
    pointer-events: none;
    font-weight: 500;
}

.node-protocols {
    font-size: 8px;
    fill: var(--text-secondary);
    text-anchor: middle;
    pointer-events: none;
}

/* D3 Links */
.link {
    stroke-width: 2px;
    fill: none;
}

.link.up {
    stroke: var(--link-up);
    opacity: 0.6;
}

.link.down {
    stroke: var(--link-down);
    stroke-dasharray: 4,4;
    stroke-width: 3px;
    opacity: 0.9;
}

.link:hover {
    stroke-width: 4px;
    opacity: 1;
}

/* Impacted nodes (connected to down links) */
.node.impacted .node-shape {
    stroke: var(--link-down) !important;
    stroke-width: 2px !important;
}

.node.impacted .node-label {
    fill: var(--link-down);
    font-weight: 600;
}

/* Spinning impact indicator */
.node .impact-spinner {
    display: none;
}

.node.impacted .impact-spinner {
    display: block;
    animation: impactSpin 1.2s linear infinite;
}

.node.impacted .impact-spinner path {
    fill: none;
    stroke: var(--link-down);
    stroke-width: 3px;
    stroke-linecap: round;
    filter: drop-shadow(0 0 6px var(--link-down)) drop-shadow(0 0 3px var(--link-down));
}

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

/* L2 View Link Styles */
.link.l2-link.trunk {
    stroke: #fbbf24;
    stroke-width: 4px;
    stroke-dasharray: 8,4;
    opacity: 0.8;
}

.link.l2-link.trunk.down {
    stroke: var(--link-down);
    stroke-dasharray: 4,4;
    opacity: 0.9;
}

.link.l2-link.access {
    stroke: #34d399;
    stroke-width: 2px;
    opacity: 0.8;
}

.link.l2-link.access.down {
    stroke: var(--link-down);
    opacity: 0.9;
    stroke-dasharray: 4,4;
}

.link.l2-link.routed {
    stroke: #6b7280;
    stroke-width: 1px;
    opacity: 0.5;
}

.link.l2-link.routed.down {
    stroke: var(--link-down);
    opacity: 0.9;
    stroke-dasharray: 4,4;
}

.link.l2-link:hover {
    stroke-width: 6px;
    opacity: 1;
}

/* Link tooltip */
.link-tooltip {
    position: absolute;
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 4px;
    padding: 0.5rem;
    font-size: 0.8rem;
    pointer-events: none;
    z-index: 1000;
    max-width: 300px;
}

.link-tooltip .endpoint {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.link-tooltip .device-name {
    color: var(--text-primary);
    font-weight: 500;
}

.link-tooltip .intf-name {
    color: var(--text-secondary);
    font-family: 'SF Mono', Monaco, monospace;
}

.link-tooltip .ip {
    color: var(--accent-secondary);
    font-family: 'SF Mono', Monaco, monospace;
}

/* L2 Link Tooltip Styles */
.link-tooltip .link-type-header {
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 3px;
    margin-bottom: 6px;
    text-align: center;
}

.link-tooltip .link-type-header.trunk {
    background: rgba(251, 191, 36, 0.3);
    color: #fbbf24;
}

.link-tooltip .link-type-header.access {
    background: rgba(52, 211, 153, 0.3);
    color: #34d399;
}

.link-tooltip .link-type-header.routed {
    background: rgba(107, 114, 128, 0.3);
    color: #9ca3af;
}

.link-tooltip .vlan-info {
    margin-top: 4px;
}

.link-tooltip .vlan-label {
    color: var(--text-secondary);
}

.link-tooltip .vlan-list {
    color: #fbbf24;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.85em;
}

.link-tooltip .native-vlan {
    color: var(--text-secondary);
    font-size: 0.85em;
    margin-top: 2px;
}

/* Device Context Menu */
.device-context-menu {
    position: absolute;
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 6px;
    padding: 0.25rem 0;
    min-width: 150px;
    z-index: 2000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    display: none;
}

.device-context-menu.visible {
    display: block;
}

.context-menu-item {
    padding: 0.5rem 1rem;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.85rem;
    transition: background 0.15s;
}

.context-menu-item:hover {
    background: var(--bg-tertiary);
}

.context-menu-item:first-child {
    border-radius: 6px 6px 0 0;
}

.context-menu-item:last-child {
    border-radius: 0 0 6px 6px;
}

.context-menu-separator {
    height: 1px;
    background: var(--bg-tertiary);
    margin: 0.25rem 0;
}

/* Powered-off node styling */
.node.powered-off .node-shape {
    opacity: 0.3;
    filter: grayscale(80%);
}

.node.powered-off .node-label {
    opacity: 0.5;
}

/* Loading state - minimal, no spinner (convergence overlay handles main loading) */
.loading {
    display: flex;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    align-items: center;
    height: 100%;
    color: var(--text-secondary);
}

.loading::after {
    display: none;
}

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

/* ============================================================================
   Streaming UI Styles
   ============================================================================ */

/* Connection Status */
.header-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    transition: background-color 0.3s;
}

.status-indicator.connected .status-dot {
    background: #4ade80;
    box-shadow: 0 0 8px rgba(74, 222, 128, 0.6);
}

.status-indicator.disconnected .status-dot {
    background: #f87171;
}

.status-indicator.connecting .status-dot {
    background: #fbbf24;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Streaming Controls */
.streaming-controls {
    display: flex;
    gap: 1px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 5px;
    padding: 2px;
    position: relative;
    margin-right: 1rem;
}

.streaming-controls::after {
    content: '';
    position: absolute;
    right: -0.5rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 20px;
    background: linear-gradient(180deg, transparent 0%, rgba(71, 85, 105, 0.5) 50%, transparent 100%);
}

.streaming-controls button {
    padding: 0.35rem 0.6rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 0.7rem;
    font-weight: 500;
}

.streaming-controls button:first-child {
    border-radius: 4px 0 0 4px;
}

.streaming-controls button:last-child {
    border-radius: 0 4px 4px 0;
}

.streaming-controls button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.restart-btn {
    border-color: var(--accent) !important;
    color: var(--accent) !important;
}

.restart-btn:hover {
    background: var(--accent) !important;
    color: white !important;
}

.restart-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.live-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.live-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-secondary);
    transition: all 0.2s;
}

.live-btn.active .live-dot {
    background: #4ade80;
    box-shadow: 0 0 6px rgba(74, 222, 128, 0.6);
    animation: pulse 2s infinite;
}

.live-btn.active {
    background: rgba(74, 222, 128, 0.15);
    color: #4ade80;
}

.event-counter {
    display: inline-block;
    padding: 0.1rem 0.35rem;
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-secondary);
    font-size: 0.65rem;
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    border-radius: 3px;
    margin-left: 0.25rem;
    min-width: 25px;
    text-align: center;
    transition: background 0.1s, color 0.1s;
    margin-left: 0.375rem;
    vertical-align: middle;
}

.event-counter.flash {
    background: var(--accent-secondary);
    color: white;
}

/* Event Log Panel */
#event-log-panel {
    position: absolute;
    right: 0;
    top: 0;
    width: 350px;
    height: 100%;
    background: var(--bg-secondary);
    border-left: 1px solid var(--bg-tertiary);
    display: flex;
    flex-direction: column;
    z-index: 101;
    transition: transform 0.3s;
}

#event-log-panel.hidden {
    transform: translateX(100%);
}

.event-log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--bg-tertiary);
}

.event-log-header h3 {
    font-size: 1rem;
    margin: 0;
}

.clear-btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    background: transparent;
    border: 1px solid var(--link-down);
    color: var(--link-down);
    border-radius: 4px;
    cursor: pointer;
    margin-right: auto;
    margin-left: 1rem;
}

.clear-btn:hover {
    background: var(--link-down);
    color: white;
}

.event-log-filters {
    display: flex;
    gap: 1rem;
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    font-size: 0.8rem;
}

.event-log-filters label {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.event-log-filters input[type="checkbox"] {
    accent-color: var(--accent);
}

/* Protocol Filter Pills */
.protocol-filter {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--bg-tertiary);
}

.protocol-filter-label {
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
}

.protocol-pills {
    display: flex;
    gap: 0.25rem;
}

.protocol-pill {
    width: 26px;
    height: 22px;
    border: 1px solid transparent;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    opacity: 0.35;
}

.protocol-pill.active {
    opacity: 1;
}

.protocol-pill.bgp {
    background: rgba(129, 140, 248, 0.2);
    color: #818cf8;
    border-color: rgba(129, 140, 248, 0.4);
}

.protocol-pill.bgp.active {
    background: rgba(129, 140, 248, 0.35);
    border-color: #818cf8;
}

.protocol-pill.eigrp {
    background: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
    border-color: rgba(251, 191, 36, 0.4);
}

.protocol-pill.eigrp.active {
    background: rgba(251, 191, 36, 0.35);
    border-color: #fbbf24;
}

.protocol-pill.ospf {
    background: rgba(34, 211, 211, 0.2);
    color: #22d3d3;
    border-color: rgba(34, 211, 211, 0.4);
}

.protocol-pill.ospf.active {
    background: rgba(34, 211, 211, 0.35);
    border-color: #22d3d3;
}

.protocol-pill.isis {
    background: rgba(168, 85, 247, 0.2);
    color: #a855f7;
    border-color: rgba(168, 85, 247, 0.4);
}

.protocol-pill.isis.active {
    background: rgba(168, 85, 247, 0.35);
    border-color: #a855f7;
}

.protocol-pill.other {
    background: rgba(148, 163, 184, 0.2);
    color: #94a3b8;
    border-color: rgba(148, 163, 184, 0.4);
}

.protocol-pill.other.active {
    background: rgba(148, 163, 184, 0.35);
    border-color: #94a3b8;
}

.protocol-pill:hover {
    transform: scale(1.05);
}

/* Node Filter */
.node-filter {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--bg-tertiary);
}

.node-filter-dropdown {
    position: relative;
    width: 100%;
}

.node-filter input[type="text"] {
    width: 100%;
    padding: 0.375rem 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.8rem;
    font-family: 'SF Mono', Monaco, monospace;
}

.node-filter input[type="text"]::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.node-filter input[type="text"]:focus {
    outline: none;
    border-color: var(--accent);
}

.node-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 200px;
    overflow-y: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-top: none;
    border-radius: 0 0 4px 4px;
    z-index: 100;
}

.node-dropdown.hidden {
    display: none;
}

.node-dropdown-item {
    padding: 0.375rem 0.5rem;
    cursor: pointer;
    font-size: 0.8rem;
    font-family: 'SF Mono', Monaco, monospace;
    color: var(--text-primary);
}

.node-dropdown-item:hover {
    background: var(--bg-tertiary);
}

.node-dropdown-item.selected {
    background: rgba(233, 69, 96, 0.2);
    color: var(--accent);
}

.node-dropdown-item.selected::after {
    content: ' ✓';
}

.node-dropdown-empty {
    padding: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-align: center;
}

.selected-nodes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.node-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.125rem 0.375rem;
    background: var(--accent);
    color: white;
    border-radius: 3px;
    font-size: 0.75rem;
    font-family: 'SF Mono', Monaco, monospace;
}

.node-chip-remove {
    background: none;
    border: none;
    color: white;
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    opacity: 0.8;
}

.node-chip-remove:hover {
    opacity: 1;
}

#event-log-content {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.event-item {
    padding: 0.625rem 0.75rem;
    margin-bottom: 0.375rem;
    background: var(--bg-primary);
    border-radius: 4px;
    font-size: 0.8rem;
    border-left: 3px solid transparent;
}

.event-item.message.proto-bgp {
    border-left-color: #818cf8;
}

.event-item.message.proto-eigrp {
    border-left-color: #fbbf24;
}

.event-item.message.proto-ospf {
    border-left-color: #22d3d3;
}

.event-item.message.proto-isis {
    border-left-color: #a855f7;
}

.event-item.message.proto-other {
    border-left-color: #94a3b8;
}

.event-item.link_change.link-up {
    border-left-color: #4ade80;
}

.event-item.link_change.link-down {
    border-left-color: #f87171;
}

.event-item.convergence {
    border-left-color: #34d399;
}

.event-item .event-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.event-item .event-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.event-item .event-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: lowercase;
}

.event-item .event-badge.bgp {
    background: rgba(129, 140, 248, 0.25);
    color: #818cf8;
}

.event-item .event-badge.eigrp {
    background: rgba(251, 191, 36, 0.25);
    color: #fbbf24;
}

.event-item .event-badge.ospf {
    background: rgba(34, 211, 211, 0.25);
    color: #22d3d3;
}

.event-item .event-badge.isis {
    background: rgba(168, 85, 247, 0.25);
    color: #a855f7;
}

.event-item .event-badge.other {
    background: rgba(148, 163, 184, 0.25);
    color: #94a3b8;
}

.event-item .event-badge.up {
    background: rgba(74, 222, 128, 0.25);
    color: #4ade80;
}

.event-item .event-badge.down {
    background: rgba(248, 113, 113, 0.25);
    color: #f87171;
}

.event-item .event-badge.converging {
    background: rgba(251, 191, 36, 0.25);
    color: #fbbf24;
}

.event-item .event-time {
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-family: 'SF Mono', Monaco, monospace;
    margin-bottom: 0.25rem;
}

.event-item .event-detail {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.event-item .event-detail::before {
    content: '';
}

.event-item .event-routes {
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.75rem;
    color: var(--accent-secondary);
    margin-top: 0.25rem;
    padding-left: 0.75rem;
}

/* Message Particles */
.message-particle {
    fill: #94a3b8;
    filter: drop-shadow(0 0 3px #94a3b8);
}

.message-particle.eigrp {
    fill: #fbbf24;
    filter: drop-shadow(0 0 4px #fbbf24);
}

.message-particle.bgp {
    fill: #818cf8;
    filter: drop-shadow(0 0 4px #818cf8);
}

.message-particle.ospf {
    fill: #22d3d3;
    filter: drop-shadow(0 0 4px #22d3d3);
}

.message-particle.isis {
    fill: #a855f7;
    filter: drop-shadow(0 0 4px #a855f7);
}

.message-particle.cdp,
.message-particle.lldp,
.message-particle.discovery {
    fill: #34d399;
    filter: drop-shadow(0 0 4px #34d399);
}

/* Ping/Traceroute particles */
.message-particle.ping-request {
    fill: #38bdf8;
    filter: drop-shadow(0 0 4px #38bdf8);
}

.message-particle.ping-reply {
    fill: #4ade80;
    filter: drop-shadow(0 0 4px #4ade80);
}

.message-particle.traceroute-probe {
    fill: #c084fc;
    filter: drop-shadow(0 0 4px #c084fc);
}

/* Link State Change Animation */
.link.flashing {
    animation: linkFlash 0.5s ease-out;
}

@keyframes linkFlash {
    0% { stroke-width: 8px; opacity: 1; }
    100% { stroke-width: 2px; }
}

.link.state-change-up {
    stroke: var(--link-up) !important;
    stroke-width: 4px;
    opacity: 1;
}

.link.state-change-down {
    stroke: var(--link-down) !important;
    stroke-width: 4px;
    opacity: 1;
}

/* Node highlighting for message events */
.node.sending .node-shape {
    filter: drop-shadow(0 0 8px #fbbf24);
}

.node.receiving .node-shape {
    filter: drop-shadow(0 0 8px #34d399);
}

/* Ping/Traceroute frosted glass overlay - covers topology container only */
.ping-frost-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.35);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    pointer-events: none;
    z-index: 9998;
    transition: opacity 0.3s ease;
}

/* Overlay SVG sits above the frost, shows active path clearly */
.ping-overlay-svg {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

/* Ping overlay group in main SVG (for legacy/fallback) */
.ping-overlay {
    pointer-events: none;
}

.overlay-particle {
    pointer-events: none;
}

/* ============================================================================
   Simulation Speed Display (compact)
   ============================================================================ */

.speed-display {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 5px;
}

.speed-display.hidden {
    display: none;
}

.sim-time {
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    color: #4ade80;
    font-size: 0.7rem;
    font-weight: 500;
}

.speed-value {
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    color: var(--text-secondary);
    font-size: 0.7rem;
    min-width: 32px;
    text-align: right;
}

.speed-value.fast-forward {
    color: #fbbf24;
}

.speed-value.paused {
    color: #f87171;
}

.speed-slider {
    width: 60px;
    height: 4px;
    appearance: none;
    background: rgba(71, 85, 105, 0.5);
    border-radius: 2px;
    cursor: pointer;
}

.speed-slider::-webkit-slider-thumb {
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: linear-gradient(180deg, #f472b6 0%, #db2777 100%);
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.speed-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: linear-gradient(180deg, #f472b6 0%, #db2777 100%);
    cursor: pointer;
    border: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* ============================================================================
   Convergence Overlay (DISABLED - now using footer indicator instead)
   ============================================================================ */

/* Blocking overlay disabled - convergence progress is shown in footer */
.convergence-overlay {
    display: none !important;
}

.convergence-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
}

.convergence-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--accent-secondary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.convergence-phase {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
}

.convergence-progress {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.convergence-overlay .convergence-bar {
    width: 200px;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.convergence-overlay .convergence-fill {
    height: 100%;
    background: var(--accent-secondary);
    transition: width 0.3s ease;
}

.convergence-pct {
    color: var(--text-secondary);
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.85rem;
    min-width: 40px;
}

.speed-slider::-webkit-slider-thumb {
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.1s;
}

.speed-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.speed-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    border: none;
    cursor: pointer;
}

.speed-slider:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.speed-slider:disabled::-webkit-slider-thumb {
    cursor: not-allowed;
}

/* ============================================================================
   Terminal Pane Styles
   ============================================================================ */

#terminal-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 900;
}

.terminal-pane {
    position: absolute;
    width: 600px;
    height: 400px;
    min-width: 400px;
    min-height: 200px;
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    pointer-events: auto;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.terminal-pane.minimized {
    height: auto !important;
    min-height: 0;
}

.terminal-pane.minimized .terminal-content,
.terminal-pane.minimized .terminal-resize-handle {
    display: none;
}

.terminal-pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-radius: 8px 8px 0 0;
    cursor: move;
    user-select: none;
    flex-shrink: 0;
}

.terminal-pane-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'SF Mono', Monaco, monospace;
}

.terminal-pane-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal-font-controls {
    display: flex;
    align-items: center;
    gap: 2px;
    background: var(--bg-primary);
    border-radius: 4px;
    padding: 2px;
}

.terminal-font-controls button {
    width: 18px;
    height: 18px;
    border: none;
    border-radius: 3px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: bold;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.terminal-font-controls button:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.terminal-font-size {
    min-width: 20px;
    text-align: center;
    font-size: 11px;
    font-family: 'SF Mono', Monaco, monospace;
    color: var(--text-secondary);
}

.terminal-pane-controls button {
    width: 20px;
    height: 20px;
    border: none;
    border-radius: 4px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.terminal-pane-controls button:hover {
    background: var(--accent);
    color: white;
}

.terminal-pane-minimize:hover {
    background: var(--role-spine) !important;
}

.terminal-pane-close:hover {
    background: var(--link-down) !important;
}

.terminal-content {
    flex: 1;
    padding: 4px;
    overflow: hidden;
    background: #0d0d1a;
}

.terminal-content .xterm {
    height: 100%;
}

.terminal-content .xterm-viewport {
    overflow-y: auto !important;
}

.terminal-resize-handle {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 16px;
    height: 16px;
    cursor: se-resize;
    background: linear-gradient(
        135deg,
        transparent 50%,
        var(--bg-tertiary) 50%,
        var(--bg-tertiary) 60%,
        transparent 60%,
        transparent 70%,
        var(--bg-tertiary) 70%,
        var(--bg-tertiary) 80%,
        transparent 80%
    );
    opacity: 0.6;
    transition: opacity 0.15s;
}

.terminal-resize-handle:hover {
    opacity: 1;
}

/* Terminal button in device panel */
.terminal-btn {
    width: 100%;
    padding: 0.625rem 1rem;
    margin-top: 1rem;
    border: 1px solid var(--accent-secondary);
    background: transparent;
    color: var(--accent-secondary);
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.terminal-btn:hover {
    background: var(--accent-secondary);
    color: white;
}

.terminal-btn::before {
    content: '>';
    font-family: 'SF Mono', Monaco, monospace;
    font-weight: bold;
}

/* ============================================================================
   Builder Mode Styles
   ============================================================================ */

/* Builder Controls */
.builder-controls {
    display: flex;
    gap: 0.35rem;
    padding-right: 0.5rem;
    margin-right: 0.25rem;
    position: relative;
}

.builder-controls::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 20px;
    background: linear-gradient(180deg, transparent 0%, rgba(71, 85, 105, 0.5) 50%, transparent 100%);
}

.builder-btn {
    padding: 0.35rem 0.6rem;
    border: 1px solid rgba(16, 185, 129, 0.4);
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 5px;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.builder-btn:hover {
    background: rgba(16, 185, 129, 0.2);
    border-color: rgba(16, 185, 129, 0.6);
    color: #34d399;
}

.builder-btn.active {
    background: linear-gradient(180deg, #10b981 0%, #059669 100%);
    color: white;
    border-color: transparent;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 0 10px rgba(16, 185, 129, 0.3);
}

.builder-icon {
    font-size: 0.9rem;
    font-weight: bold;
    line-height: 1;
}

.save-btn {
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--bg-tertiary);
    background: var(--bg-primary);
    font-size: 0.7rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
    border-radius: 4px;
}

.save-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.save-btn.hidden {
    display: none;
}

.run-btn {
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--link-up);
    background: rgba(74, 222, 128, 0.15);
    font-size: 0.875rem;
    color: var(--link-up);
    cursor: pointer;
    transition: all 0.2s;
    border-radius: 4px;
    font-weight: 500;
}

.run-btn:hover:not(:disabled) {
    background: rgba(74, 222, 128, 0.3);
    color: #fff;
}

.run-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.run-btn.hidden {
    display: none;
}

/* Builder Mode Canvas Cursor */
body.builder-mode #topology-svg {
    cursor: crosshair;
}

body.builder-mode .node {
    cursor: grab;
}

body.builder-mode .node:active {
    cursor: grabbing;
}

/* Builder Dialogs */
.builder-dialog {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(2px);
}

.builder-dialog.hidden {
    display: none;
}

.dialog-content {
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 8px;
    min-width: 350px;
    max-width: 90vw;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.dialog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--bg-tertiary);
}

.dialog-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.dialog-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.dialog-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.dialog-body {
    padding: 1.25rem;
}

.dialog-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--bg-tertiary);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 0.375rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: 'SF Mono', Monaco, monospace;
}

.form-group input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-secondary);
}

.btn-cancel {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.15s;
}

.btn-cancel:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-primary {
    padding: 0.5rem 1.25rem;
    background: var(--accent-secondary);
    border: 1px solid var(--accent-secondary);
    color: white;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.15s;
}

.btn-primary:hover {
    background: #0db598;
    border-color: #0db598;
}

/* Link Dialog Endpoints */
.link-endpoints {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.endpoint-column {
    flex: 1;
}

.endpoint-device {
    background: var(--bg-tertiary);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    color: var(--text-primary);
}

.link-arrow {
    font-size: 1.5rem;
    color: var(--text-secondary);
    padding-top: 0.5rem;
}

/* Context Menu */
.context-menu {
    position: fixed;
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 6px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    min-width: 160px;
    z-index: 1001;
    padding: 0.25rem 0;
}

.context-menu.hidden {
    display: none;
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: background 0.1s;
}

.context-menu-item:hover {
    background: var(--bg-tertiary);
}

.context-menu-item.danger {
    color: var(--link-down);
}

.context-menu-item.danger:hover {
    background: rgba(248, 113, 113, 0.15);
}

.context-menu-divider {
    height: 1px;
    background: var(--bg-tertiary);
    margin: 0.25rem 0;
}

.menu-icon {
    font-family: 'SF Mono', Monaco, monospace;
    font-weight: bold;
    width: 14px;
    text-align: center;
}

/* Drag Link Preview Line */
.drag-link-preview {
    stroke: var(--accent-secondary);
    stroke-width: 3;
    stroke-dasharray: 8,4;
    opacity: 0.8;
    pointer-events: none;
}

/* Builder Mode Indicator on Nodes */
body.builder-mode .node .node-shape {
    stroke-dasharray: none;
}

body.builder-mode .node:hover .node-shape {
    stroke: var(--accent-secondary) !important;
    stroke-width: 3px;
    filter: drop-shadow(0 0 6px var(--accent-secondary));
}

/* Node Drag Target Highlight */
.node.drag-target .node-shape {
    stroke: var(--accent-secondary) !important;
    stroke-width: 4px;
    filter: drop-shadow(0 0 8px var(--accent-secondary));
}

/* Builder mode notification toast */
.builder-toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    z-index: 1002;
    animation: toastSlideUp 0.3s ease-out;
}

.builder-toast.success {
    border-left: 3px solid var(--link-up);
}

.builder-toast.error {
    border-left: 3px solid var(--link-down);
}

@keyframes toastSlideUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ============================================================================
   Lab Browser Styles
   ============================================================================ */

.lab-browser-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(4px);
}

.lab-browser-modal.hidden {
    display: none;
}

.lab-browser-content {
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 12px;
    width: 90vw;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
}

.lab-browser-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--bg-tertiary);
}

.lab-browser-header h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.lab-browser-header .close-btn {
    position: static;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: var(--bg-tertiary);
}

.lab-browser-header .close-btn:hover {
    background: var(--accent);
    color: white;
}

.lab-browser-path {
    padding: 0.75rem 1.5rem;
    background: var(--bg-primary);
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: 'SF Mono', Monaco, monospace;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.lab-browser-path .path-icon {
    opacity: 0.7;
}

.lab-browser-grid {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.lab-card {
    position: relative;
    background: var(--bg-primary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 8px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.lab-card:hover {
    border-color: var(--accent-secondary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.lab-card.loading {
    opacity: 0.7;
    pointer-events: none;
}

.lab-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.lab-card-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.lab-card-badges {
    display: flex;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.lab-card-badge {
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
}

.lab-card-badge.checkpoint {
    background: rgba(74, 222, 128, 0.2);
    color: var(--link-up);
}

.lab-card-badge.no-checkpoint {
    background: rgba(148, 163, 184, 0.2);
    color: var(--text-secondary);
}

.lab-card-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
    flex: 1;
}

.lab-card-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.lab-card-stats span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.lab-card-protocols {
    display: flex;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.lab-card-modified {
    font-size: 0.75rem;
    color: var(--text-secondary);
    opacity: 0.8;
}

.lab-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--bg-tertiary);
    flex-wrap: wrap;
}

.lab-card-checkpoint-option {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.lab-card-checkpoint-option input {
    cursor: pointer;
}

.lab-card .btn-delete {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 1.5rem;
    height: 1.5rem;
    padding: 0;
    border: none;
    background: rgba(248, 113, 113, 0.2);
    color: var(--link-down);
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    opacity: 0;
    transition: opacity 0.2s, background 0.2s;
}

.lab-card:hover .btn-delete {
    opacity: 1;
}

.lab-card .btn-delete:hover {
    background: var(--link-down);
    color: white;
}

.lab-card .btn-load {
    padding: 0.375rem 1rem;
    background: var(--accent-secondary);
    border: none;
    border-radius: 4px;
    color: white;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
}

.lab-card .btn-load:hover {
    background: #0db598;
}

.lab-card .btn-load:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.lab-browser-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.lab-browser-empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Empty simulation overlay */
.empty-simulation-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    gap: 1rem;
    z-index: 50;
}

.empty-simulation-overlay.hidden {
    display: none;
}

.empty-simulation-icon {
    font-size: 4rem;
    opacity: 0.3;
}

.empty-simulation-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.empty-simulation-btn {
    padding: 0.75rem 2rem;
    background: var(--accent-secondary);
    border: none;
    border-radius: 6px;
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.empty-simulation-btn:hover {
    background: #0db598;
    transform: translateY(-1px);
}

.empty-simulation-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.empty-simulation-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.empty-simulation-btn.secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-secondary);
}

/* ============================================================================
   Simulation Controls Styles
   ============================================================================ */

.sim-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-right: 0.75rem;
    margin-right: 0.25rem;
    position: relative;
}

.sim-controls::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 20px;
    background: linear-gradient(180deg, transparent 0%, rgba(71, 85, 105, 0.5) 50%, transparent 100%);
}

.sim-controls .btn-load-lab {
    padding: 0.4rem 0.7rem;
    background: linear-gradient(180deg, #10b981 0%, #059669 100%);
    border: none;
    border-radius: 5px;
    color: white;
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
}

.sim-controls .btn-load-lab:hover {
    background: linear-gradient(180deg, #34d399 0%, #10b981 100%);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.sim-controls .btn-load-lab:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.sim-controls .lab-name {
    white-space: nowrap;
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: 0.7rem;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

.sim-controls .sim-state {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.sim-controls .sim-state.idle {
    background: rgba(148, 163, 184, 0.15);
    color: var(--text-secondary);
}

.sim-controls .sim-state.loading {
    background: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
    animation: pulse 1.5s ease-in-out infinite;
}

.sim-controls .sim-state.converged {
    background: rgba(74, 222, 128, 0.2);
    color: #4ade80;
}

.sim-controls .sim-state.paused {
    background: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
}

.sim-controls .sim-state.error {
    background: rgba(248, 113, 113, 0.2);
    color: #f87171;
}

/* Simulation control buttons - grouped together */
.sim-control-btn {
    width: 26px;
    height: 26px;
    border: 1px solid rgba(71, 85, 105, 0.4);
    background: rgba(15, 23, 42, 0.6);
    color: var(--text-secondary);
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    font-size: 0.85rem;
}

.sim-control-btn:hover:not(:disabled) {
    background: rgba(51, 65, 85, 0.8);
    color: var(--text-primary);
    border-color: rgba(100, 116, 139, 0.5);
}

.sim-control-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.sim-control-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.sim-control-btn.pause:hover:not(:disabled) {
    background: rgba(251, 191, 36, 0.2);
    border-color: rgba(251, 191, 36, 0.5);
    color: #fbbf24;
}

.sim-control-btn.stop:hover:not(:disabled) {
    background: rgba(248, 113, 113, 0.2);
    border-color: rgba(248, 113, 113, 0.5);
    color: #f87171;
}

.sim-control-btn.restart:hover:not(:disabled) {
    background: rgba(74, 222, 128, 0.2);
    border-color: rgba(74, 222, 128, 0.5);
    color: #4ade80;
}

.sim-control-btn.save:hover:not(:disabled) {
    background: rgba(96, 165, 250, 0.2);
    border-color: rgba(96, 165, 250, 0.5);
    color: #60a5fa;
}

.sim-control-btn.delay-toggle:hover:not(:disabled) {
    background: rgba(167, 139, 250, 0.2);
    border-color: rgba(167, 139, 250, 0.5);
    color: #a78bfa;
}

.sim-control-btn.delay-toggle.active {
    background: rgba(167, 139, 250, 0.25);
    border-color: rgba(167, 139, 250, 0.6);
    color: #a78bfa;
}

.sim-control-btn.delay-toggle.active:hover:not(:disabled) {
    background: rgba(167, 139, 250, 0.35);
}

/* Loading progress in header */
.loading-progress {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    background: var(--bg-primary);
    border-radius: 4px;
    font-size: 0.8rem;
}

.loading-progress-bar {
    width: 80px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.loading-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #fbbf24, #34d399);
    transition: width 0.3s ease;
}

.loading-progress-text {
    min-width: 35px;
    text-align: right;
    color: var(--text-secondary);
}