:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #22c55e;
    --error: #ef4444;
    --warning: #f59e0b;
    --border: #475569;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header h1 {
    font-size: 18px;
    font-weight: 600;
}

.header h1 span { color: var(--accent); }
.header h1 small { font-weight: 400; font-size: 12px; color: var(--warning); }

.header-status {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

.header-clock {
    font-family: monospace;
    font-size: 13px;
}

.status-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}

.status-dot.connected { background: var(--success); }
.status-dot.disconnected { background: var(--error); }
.status-dot.connecting { background: var(--warning); animation: pulse 1s infinite; }

@keyframes pulse { 50% { opacity: 0.5; } }

/* Main layout */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Stats bar */
.stats-bar {
    display: flex;
    gap: 16px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.stat-card {
    flex: 1;
    background: var(--bg-card);
    border-radius: 8px;
    padding: 12px 16px;
    text-align: center;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    font-family: monospace;
}

.stat-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Panels - 3 columns */
.panels {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.panel-left {
    width: 280px;
    min-width: 200px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-center {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 400px;
}

.panel-right {
    width: clamp(280px, 30%, 420px);
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-section {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.panel-section-grow {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-bottom: none;
}

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

.panel-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.panel-section h3 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.panel-header h3 {
    margin-bottom: 0;
}

/* Agent Diagram */
.agent-diagram {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.diagram-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.diagram-svg line {
    stroke: var(--border);
    stroke-width: 1.5;
    transition: stroke 0.3s, stroke-width 0.3s, opacity 0.3s;
}

.diagram-svg line.line-active {
    stroke: var(--success);
    stroke-width: 2.5;
    filter: drop-shadow(0 0 4px var(--success));
}

.diagram-svg line.line-routing {
    stroke: var(--warning);
    stroke-width: 2.5;
    filter: drop-shadow(0 0 4px var(--warning));
}

.diagram-nodes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Orchestrator node */
.orchestrator-node {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    cursor: default;
    z-index: 2;
}

.orchestrator-node .node-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
    transition: border-color 0.3s, box-shadow 0.3s;
}

.orchestrator-node .node-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    position: absolute;
    top: 64px;
    left: 50%;
    transform: translateX(-50%);
}

.orchestrator-node.routing .node-icon {
    border-color: var(--warning);
    box-shadow: 0 0 12px rgba(245, 158, 11, 0.5), 0 0 24px rgba(245, 158, 11, 0.2);
    animation: pulse-routing 1s ease-in-out infinite;
}

/* Agent node */
.agent-node {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    cursor: default;
    z-index: 2;
    transition: transform 0.2s;
}

/* Avatar container: head + body silhouette */
.node-avatar {
    position: relative;
    width: 48px;
    height: 54px;
}

/* Head - circle */
.agent-node .node-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    transition: border-color 0.3s, box-shadow 0.3s, background 0.3s, color 0.3s;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

/* Body/shoulders - arc below head */
.agent-node .node-icon::before {
    content: '';
    position: absolute;
    top: 28px;
    left: 50%;
    transform: translateX(-50%);
    width: 42px;
    height: 20px;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-top: none;
    border-radius: 0 0 14px 14px;
    z-index: -1;
    transition: border-color 0.3s, background 0.3s;
}

.agent-node .node-label {
    font-size: 10px;
    color: var(--text-secondary);
    text-align: center;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: color 0.3s;
}

.agent-node .node-status {
    font-size: 9px;
    color: var(--warning);
    min-height: 12px;
    text-align: center;
}

/* Agent node - universal variant */
.agent-node.universal .node-icon {
    border-color: rgba(59, 130, 246, 0.4);
    color: var(--accent);
}
.agent-node.universal .node-icon::before {
    border-color: rgba(59, 130, 246, 0.4);
}

/* Agent node states */
.agent-node.active .node-icon {
    border-color: var(--success);
    color: var(--success);
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.4), 0 0 20px rgba(34, 197, 94, 0.15);
    animation: pulse-active 1.5s ease-in-out infinite;
}
.agent-node.active .node-icon::before {
    border-color: var(--success);
}

.agent-node.active .node-label {
    color: var(--success);
}

.agent-node.error .node-icon {
    border-color: var(--error);
    color: var(--error);
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.4);
    animation: flash-error 0.4s ease-in-out 3;
}
.agent-node.error .node-icon::before {
    border-color: var(--error);
}

.agent-node.error .node-label {
    color: var(--error);
}

/* Status indicators - use ::after on avatar container */
.agent-node.thinking .node-avatar::after {
    content: '...';
    position: absolute;
    top: 0;
    right: -2px;
    font-size: 10px;
    color: var(--warning);
    animation: pulse 1s infinite;
    z-index: 3;
}

.agent-node.tool-active .node-avatar::after {
    content: 'MCP';
    position: absolute;
    top: -2px;
    right: -6px;
    font-size: 8px;
    font-weight: 600;
    color: var(--bg-primary);
    background: var(--warning);
    padding: 0 3px;
    border-radius: 3px;
    z-index: 3;
}

/* Animations */
@keyframes pulse-active {
    0%, 100% { box-shadow: 0 0 10px rgba(34, 197, 94, 0.4), 0 0 20px rgba(34, 197, 94, 0.15); }
    50% { box-shadow: 0 0 16px rgba(34, 197, 94, 0.6), 0 0 30px rgba(34, 197, 94, 0.25); }
}

@keyframes pulse-routing {
    0%, 100% { box-shadow: 0 0 12px rgba(245, 158, 11, 0.5), 0 0 24px rgba(245, 158, 11, 0.2); }
    50% { box-shadow: 0 0 20px rgba(245, 158, 11, 0.7), 0 0 36px rgba(245, 158, 11, 0.3); }
}

@keyframes flash-error {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes flash-success {
    0% { box-shadow: 0 0 20px rgba(34, 197, 94, 0.8); }
    100% { box-shadow: none; }
}

/* Session list */
.session-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.session-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 10px;
    background: var(--bg-card);
    border-radius: 6px;
    font-size: 13px;
}

.session-user {
    font-weight: 600;
}

.session-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--text-secondary);
}

.session-roles {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.role-tag {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 500;
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent);
}

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

/* Event feed */
.event-feed {
    flex: 1;
    overflow-y: auto;
    padding: 0 12px 12px;
}

.event-item {
    padding: 8px 8px;
    border-bottom: 1px solid rgba(71, 85, 105, 0.3);
    font-size: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 4px 8px;
    align-items: flex-start;
}

.event-item.hidden { display: none; }

.event-time {
    color: var(--text-secondary);
    font-family: monospace;
    white-space: nowrap;
    flex-shrink: 0;
    font-size: 11px;
}

.event-icon { flex-shrink: 0; width: 16px; text-align: center; font-size: 11px; }

.event-tags {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.event-session {
    font-family: monospace;
    font-size: 10px;
    padding: 1px 5px;
    border-radius: 3px;
    background: var(--bg-card);
    color: var(--text-secondary);
}
.event-agent {
    font-size: 10px;
    padding: 1px 5px;
    border-radius: 3px;
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent);
}
.event-msg {
    word-break: break-word;
    flex: 1 1 100%;
    min-width: 0;
}

.event-item.success .event-icon { color: var(--success); }
.event-item.error .event-icon { color: var(--error); }
.event-item.error .event-msg { color: var(--error); }
.event-item.info .event-icon { color: var(--accent); }
.event-item.working .event-icon { color: var(--warning); }

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-small {
    padding: 4px 10px;
    font-size: 11px;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
}

.btn-small:hover {
    background: var(--border);
    color: var(--text-primary);
}

/* Filter */
.filter-label {
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
}

.filter-label input { cursor: pointer; }

/* Empty state */
.empty-state {
    color: var(--text-secondary);
    font-size: 12px;
    font-style: italic;
    padding: 8px 0;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* Responsive */

/* Large - narrow sidebars */
@media (max-width: 1400px) {
    .panel-left { width: 240px; min-width: 180px; }
    .panel-right { width: clamp(240px, 28%, 360px); }
}

/* Medium - hide left sidebar, 2-column layout */
@media (max-width: 1100px) {
    .panel-left { width: 200px; min-width: 160px; }
    .panel-center { min-width: 280px; }
    .panel-right { width: clamp(220px, 30%, 320px); }

    .stats-bar { gap: 8px; padding: 12px 16px; }
    .stat-card { padding: 8px 10px; }
    .stat-value { font-size: 22px; }
    .stat-label { font-size: 10px; letter-spacing: 0.5px; }

    .event-time { font-size: 10px; }
    .event-msg { font-size: 11px; }
}

/* Tablet - stack to column */
@media (max-width: 800px) {
    .header { padding: 10px 16px; }
    .header h1 { font-size: 16px; }

    .stats-bar {
        flex-wrap: wrap;
        gap: 8px;
        padding: 10px 16px;
    }
    .stat-card {
        flex: 1 1 calc(50% - 4px);
        min-width: 0;
    }

    .panels {
        flex-direction: column;
        overflow-y: auto;
    }
    .panel-left, .panel-right, .panel-center {
        width: 100% !important;
        min-width: 0 !important;
        border: none !important;
        border-bottom: 1px solid var(--border) !important;
        flex-shrink: 0;
    }
    .panel-left {
        max-height: 180px;
        overflow-y: auto;
    }
    .panel-center {
        min-height: 300px;
        height: 40vh;
    }
    .panel-right {
        min-height: 250px;
        flex: 1;
    }

    .panel-header {
        flex-wrap: wrap;
        gap: 8px;
    }

    .event-msg { flex: 1 1 100%; }
}

/* Mobile */
@media (max-width: 500px) {
    .header { padding: 8px 12px; }
    .header h1 small { display: none; }
    .header-status { gap: 10px; font-size: 12px; }

    .stats-bar { padding: 8px 12px; gap: 6px; }
    .stat-card { padding: 6px 8px; }
    .stat-value { font-size: 18px; }
    .stat-label { font-size: 9px; }

    .panel-section { padding: 10px 12px; }
    .panel-header { margin-bottom: 8px; }

    .event-feed { padding: 0 8px 8px; }
    .event-item { padding: 6px 4px; gap: 3px 6px; font-size: 11px; }
    .event-time { font-size: 9px; }
    .event-icon { width: 14px; font-size: 10px; }
    .event-tags { gap: 3px; }
    .event-session, .event-agent { font-size: 9px; padding: 0 4px; }
    .event-msg { font-size: 11px; }

    .panel-left { max-height: 150px; }
    .panel-center { min-height: 250px; height: 35vh; }
}