:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #2d333b;
  --text: #c9d1d9;
  --muted: #8b949e;
  --accent: #58a6ff;
  --ok: #3fb950;
  --warning: #d29922;
  --critical: #f85149;
  --unknown: #6e7681;
  --static: #6ea8fe;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 13px/1.5 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  flex-direction: column;
}

#topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 14px; background: var(--panel);
  border-bottom: 1px solid var(--border); flex: 0 0 auto;
}
.brand { display: flex; align-items: baseline; gap: 8px; }
.logo { color: var(--accent); font-size: 18px; }
.title { font-weight: 600; font-size: 15px; }
.tagline { color: var(--muted); font-size: 12px; }
.status { display: flex; align-items: center; gap: 8px; }

.viewtabs { display: flex; gap: 0; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.viewtab {
  background: var(--panel-2); color: var(--muted); border: none; cursor: pointer;
  padding: 4px 14px; font-size: 12px;
}
.viewtab.active { background: var(--accent); color: #06080d; font-weight: 600; }

#graph-pane.hidden, #network-pane.hidden, #tf-pane.hidden, #diag-pane.hidden { display: none; }
#network-pane, #tf-pane, #diag-pane { flex: 1 1 auto; display: flex; flex-direction: column; min-width: 0; }
.net-toolbar {
  display: flex; align-items: center; gap: 10px; padding: 8px 12px;
  border-bottom: 1px solid var(--border); flex: 0 0 auto;
}
#net-filter, #tf-filter, #diag-filter {
  flex: 1; max-width: 360px; background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px; padding: 5px 9px; font: inherit;
}
.net-table-wrap { flex: 1 1 auto; overflow: auto; min-height: 0; }
#net-table { width: 100%; border-collapse: collapse; font-size: 12px; }
#net-table th {
  position: sticky; top: 0; background: var(--panel-2); color: var(--muted);
  text-align: left; padding: 7px 10px; cursor: pointer; white-space: nowrap;
  border-bottom: 1px solid var(--border); user-select: none;
}
#net-table th:hover { color: var(--text); }
#net-table th.sorted { color: var(--accent); }
#net-table td {
  padding: 5px 10px; border-bottom: 1px solid var(--border-soft, #21262d);
  white-space: nowrap; max-width: 320px; overflow: hidden; text-overflow: ellipsis;
}
#net-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
#net-table tr { cursor: pointer; }
#net-table tbody tr:hover { background: var(--panel-2); }
#net-table tr.row-warning td:first-child { border-left: 3px solid var(--warning); }
#net-table tr.row-critical td:first-child { border-left: 3px solid var(--critical); }
#net-table tr.row-ok td:first-child { border-left: 3px solid var(--ok); }
.net-badge { padding: 1px 6px; border-radius: 8px; font-size: 11px; border: 1px solid var(--border); }
.net-badge.mismatch { color: var(--critical); border-color: var(--critical); }
.net-badge.critical { color: var(--critical); }
.net-badge.warning { color: var(--warning); }
.net-badge.ok { color: var(--ok); }
.net-badge.unknown { color: var(--unknown); }

.chip {
  padding: 2px 8px; border-radius: 10px; background: var(--panel-2);
  border: 1px solid var(--border); font-size: 12px; color: var(--muted);
}
.chip.hidden { display: none; }
.conn-on { color: var(--ok); border-color: var(--ok); }
.conn-off { color: var(--warning); border-color: var(--warning); }

.btn {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 4px 9px; font-size: 12px; cursor: pointer;
  text-decoration: none;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.active { border-color: var(--accent); color: var(--accent); background: rgba(88,166,255,0.12); }

.brief-btn {
  display: inline-block; margin: 2px 8px 4px 0;
  background: var(--panel-2); color: var(--accent);
  border: 1px solid var(--accent); border-radius: 6px;
  padding: 4px 10px; font-size: 12px; cursor: pointer;
}
.brief-btn:hover { background: var(--accent); color: #06080d; }

.node-path { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; font-size: 12px; }
.pp-node { background: var(--panel-2); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; }
.pp-node.pivot { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.pp-edge { color: var(--muted); font-variant-numeric: tabular-nums; }
.pp-edge.slow { color: var(--critical); font-weight: 600; }
.pp-arrow { color: var(--muted); }

.cb-row { display: flex; justify-content: space-between; gap: 8px; font-size: 12px; padding: 1px 0; }
.cb-name { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cb-p95 { font-variant-numeric: tabular-nums; }
.cb-row.slow .cb-p95 { color: var(--critical); font-weight: 600; }

.pp-cb { font-size: 10px; color: var(--muted); border: 1px solid var(--border); border-radius: 4px; padding: 0 3px; font-variant-numeric: tabular-nums; }
.pp-cb.slow { color: var(--critical); border-color: var(--critical); font-weight: 600; }

.health-ok { color: var(--ok); border-color: var(--ok); }
.health-degraded { color: var(--warning); border-color: var(--warning); }
.health-critical { color: var(--critical); border-color: var(--critical); font-weight: 600; }

#demo-banner {
  background: linear-gradient(90deg, #132030, #0d1117);
  border-bottom: 1px solid var(--accent);
  color: var(--text); font-size: 12.5px; padding: 6px 14px; text-align: center;
}
#demo-banner b { color: var(--accent); }
#demo-banner a { color: var(--accent); text-decoration: none; }
#demo-banner a:hover { text-decoration: underline; }

.mini-issue { display: flex; align-items: center; gap: 6px; font-size: 12px; padding: 3px 6px; margin: 2px 0; border-radius: 5px; background: var(--panel-2); border-left: 3px solid var(--border); cursor: pointer; }
.mini-issue:hover { background: var(--panel); }
.mini-issue.critical { border-left-color: var(--critical); }
.mini-issue.warning { border-left-color: var(--warning); }
.mini-issue.info { border-left-color: var(--accent); }
.mini-issue .sev { font-size: 9px; text-transform: uppercase; padding: 0 4px; border-radius: 3px; background: var(--border); color: var(--text); }
.mini-issue.critical .sev { background: var(--critical); color: #000; }
.mini-issue.warning .sev { background: var(--warning); color: #000; }
.mini-issue.info .sev { background: var(--accent); color: #000; }

#readiness {
  display: flex; align-items: stretch; gap: 1px; flex: 0 0 auto;
  background: var(--border); border-bottom: 1px solid var(--border);
}
#readiness .stage {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  gap: 2px; padding: 6px 4px; background: var(--panel); cursor: pointer;
  border-bottom: 3px solid var(--unknown); min-width: 0;
}
#readiness .stage:hover { background: var(--panel-2); }
#readiness .stage.ok { border-bottom-color: var(--ok); }
#readiness .stage.warning { border-bottom-color: var(--warning); }
#readiness .stage.critical { border-bottom-color: var(--critical); }
#readiness .stage .name {
  font-size: 11px; text-transform: capitalize; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%;
}
#readiness .stage .verdict { font-size: 10px; font-weight: 600; }
#readiness .stage.ok .verdict { color: var(--ok); }
#readiness .stage.warning .verdict { color: var(--warning); }
#readiness .stage.critical .verdict { color: var(--critical); }
#readiness .stage.unknown .verdict { color: var(--unknown); }

#stage-legend {
  position: absolute; right: 10px; top: 10px; display: flex; flex-direction: column;
  gap: 3px; background: rgba(22,27,34,.85); padding: 6px 10px; border-radius: 6px;
  border: 1px solid var(--border); font-size: 11px; color: var(--muted);
}
#stage-legend.hidden { display: none; }
#stage-legend span { display: flex; align-items: center; gap: 6px; }
#stage-legend i { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }

main { flex: 1 1 auto; display: flex; min-height: 0; }
#graph-pane { flex: 1 1 auto; position: relative; min-width: 0; }
#cy { position: absolute; inset: 0; }
#legend {
  position: absolute; left: 10px; bottom: 10px; display: flex; gap: 12px;
  background: rgba(22,27,34,.85); padding: 5px 10px; border-radius: 6px;
  border: 1px solid var(--border); font-size: 11px; color: var(--muted);
}
#legend span { display: flex; align-items: center; gap: 5px; }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot.ok { background: var(--ok); }
.dot.warning { background: var(--warning); }
.dot.critical { background: var(--critical); }
.dot.unknown { background: var(--unknown); }

#side {
  flex: 0 0 380px; background: var(--panel); border-left: 1px solid var(--border);
  display: flex; flex-direction: column; min-height: 0;
}
#tabs { display: flex; border-bottom: 1px solid var(--border); }
.tab {
  flex: 1; background: none; border: none; color: var(--muted);
  padding: 10px; cursor: pointer; font-size: 13px; border-bottom: 2px solid transparent;
}
.tab.active { color: var(--text); border-bottom-color: var(--accent); }
.tab.hidden { display: none; }

.settings label { display: flex; justify-content: space-between; align-items: center;
  gap: 10px; margin: 6px 0; color: var(--muted); }
.settings input, .settings textarea {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 5px; padding: 4px 7px; font: inherit; }
.settings input[type=number] { width: 130px; }
.settings textarea { width: 100%; font-family: monospace; font-size: 12px; }
.settings #cfg-save { margin-top: 8px; }
.settings #cfg-status { margin-left: 8px; }
.badge {
  background: var(--critical); color: #fff; border-radius: 9px;
  padding: 0 6px; font-size: 11px; margin-left: 4px;
}
.badge.zero { background: var(--unknown); }

.tab-body { display: none; overflow-y: auto; padding: 10px; flex: 1 1 auto; }
.tab-body.active { display: block; }
.hint { color: var(--muted); }

.issue {
  border: 1px solid var(--border); border-left-width: 3px; border-radius: 6px;
  padding: 9px 11px; margin-bottom: 9px; background: var(--panel-2);
}
.issue.critical { border-left-color: var(--critical); }
.issue.warning { border-left-color: var(--warning); }
.issue.info { border-left-color: var(--accent); }
.issue h4 { margin: 0 0 4px; font-size: 13px; }
.issue .sev {
  font-size: 10px; text-transform: uppercase; letter-spacing: .04em;
  padding: 1px 6px; border-radius: 8px; margin-right: 6px;
}
.issue.critical .sev { background: var(--critical); color: #fff; }
.issue.warning .sev { background: var(--warning); color: #000; }
.issue.info .sev { background: var(--accent); color: #000; }
.issue p { margin: 4px 0; color: var(--text); }
.issue ul { margin: 4px 0; padding-left: 16px; color: var(--muted); }
.issue .actions { color: var(--ok); }

.kv { display: grid; grid-template-columns: 130px 1fr; gap: 2px 8px; margin: 8px 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }
.section-title {
  font-size: 11px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--muted); margin: 14px 0 6px; border-bottom: 1px solid var(--border);
  padding-bottom: 3px;
}
.pill {
  display: inline-block; padding: 1px 7px; border-radius: 10px;
  font-size: 11px; border: 1px solid var(--border); margin: 2px 3px 2px 0;
}
.pill.ok { color: var(--ok); }
.pill.warning { color: var(--warning); }
.pill.critical { color: var(--critical); }
.pill.mismatch { color: var(--critical); border-color: var(--critical); }

#replaybar {
  flex: 0 0 auto; display: flex; align-items: center; gap: 12px;
  padding: 8px 14px; background: var(--panel); border-top: 1px solid var(--border);
}
#replaybar.hidden { display: none; }
#replaybar .replay-chip { color: var(--accent); border-color: var(--accent); }
#rp-seek { flex: 1; accent-color: var(--accent); cursor: pointer; }
#rp-frame { min-width: 78px; text-align: center; }

/* --- TF tree view --- */
.dot.static { background: var(--static); }
.tf-legend { color: var(--muted); font-size: 11px; display: flex; align-items: center; gap: 6px; }
.tf-legend .dot { margin-left: 8px; }
.tf-tree-wrap { flex: 1 1 auto; overflow: auto; min-height: 0; padding: 8px 12px; font-size: 12px; }
.tf-row {
  display: flex; align-items: center; gap: 8px; padding: 3px 0;
  padding-left: calc(var(--d) * 22px);
}
.tf-row.dim { opacity: 0.3; }
.tf-row .dot { flex: 0 0 auto; }
.tf-frame { font-family: ui-monospace, "SF Mono", Menlo, monospace; color: var(--text); }
.tf-badge {
  font-size: 10px; padding: 1px 6px; border-radius: 8px; border: 1px solid var(--border);
  color: var(--muted);
}
.tf-badge.ok { color: var(--ok); border-color: var(--ok); }
.tf-badge.warning { color: var(--warning); border-color: var(--warning); }
.tf-badge.critical { color: var(--critical); border-color: var(--critical); }
.tf-badge.static { color: var(--static); border-color: var(--static); }
.tf-badge.root { color: var(--muted); }

/* --- Diagnostics view --- */
.diag-wrap { flex: 1 1 auto; overflow: auto; min-height: 0; padding: 8px 12px; }
.diag-item {
  display: flex; gap: 10px; padding: 8px 10px; margin-bottom: 6px;
  background: var(--panel-2); border: 1px solid var(--border);
  border-left-width: 3px; border-radius: 6px;
}
.diag-item.ok { border-left-color: var(--ok); }
.diag-item.warning { border-left-color: var(--warning); }
.diag-item.critical { border-left-color: var(--critical); }
.diag-item.stale { border-left-color: var(--unknown); }
.diag-level {
  flex: 0 0 auto; align-self: flex-start; font-size: 10px; font-weight: 600;
  padding: 2px 7px; border-radius: 8px; border: 1px solid var(--border);
}
.diag-level.ok { color: var(--ok); border-color: var(--ok); }
.diag-level.warning { color: var(--warning); border-color: var(--warning); }
.diag-level.critical { color: var(--critical); border-color: var(--critical); }
.diag-level.stale { color: var(--unknown); border-color: var(--unknown); }
.diag-body { min-width: 0; }
.diag-name { font-family: ui-monospace, "SF Mono", Menlo, monospace; color: var(--text); }
.diag-msg { color: var(--muted); font-size: 12px; margin-top: 2px; }
.diag-hw { color: var(--unknown); font-size: 11px; margin-top: 2px; }