:root {
  --bg: #0e1116;
  --bg-elev: #161b22;
  --bg-card: #1c222b;
  --border: #2a313c;
  --border-soft: #232932;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --text-faint: #6b7280;
  --accent: #58a6ff;
  --accent-soft: rgba(88, 166, 255, 0.15);
  --green: #3fb950;
  --red: #f85149;
  --yellow: #d29922;
  --purple: #bc8cff;
  --orange: #db6d28;
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#app { display: flex; flex-direction: column; height: 100vh; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 18px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.brand-name { font-weight: 600; font-size: 15px; }
.brand-sub { color: var(--text-dim); font-size: 12px; }
.build-info {
  margin-left: 8px; padding: 2px 8px; border-radius: 3px;
  font-family: var(--mono); font-size: 11px;
  background: var(--bg-card); color: var(--text-dim);
  border: 1px solid var(--border-soft);
  cursor: help;
}
.build-info.fresh { color: var(--green); border-color: var(--green); }
.build-info.stale { color: var(--yellow); border-color: var(--yellow); }

.topbar-status { display: flex; align-items: center; gap: 16px; }
.kv { display: inline-flex; gap: 6px; align-items: center; }
.kv .k { color: var(--text-dim); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
.kv .v { color: var(--text); font-family: var(--mono); font-size: 12px; }
.conn-state {
  padding: 3px 8px; border-radius: 4px; font-size: 11px;
  font-family: var(--mono); text-transform: uppercase;
  background: rgba(210, 153, 34, 0.15); color: var(--yellow);
}
.conn-state.connected { background: rgba(63, 185, 80, 0.15); color: var(--green); }
.conn-state.disconnected { background: rgba(248, 81, 73, 0.15); color: var(--red); }

.tabs {
  display: flex; gap: 0;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  padding: 0 12px;
  flex-shrink: 0;
}
.tab {
  background: transparent; border: none; color: var(--text-dim);
  padding: 10px 16px; cursor: pointer; font-size: 13px; font-family: var(--sans);
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  position: relative;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.tab.flash { animation: tabflash 0.4s ease-out; }
@keyframes tabflash {
  0%   { background: rgba(88, 166, 255, 0.25); }
  100% { background: transparent; }
}

.flash-panel { animation: panelflash 0.3s ease-out; }
@keyframes panelflash {
  0%   { background: rgba(88, 166, 255, 0.04); }
  100% { background: transparent; }
}

.refresh-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 2px 10px; border-radius: 10px;
  font-size: 11px; font-family: var(--mono);
  background: var(--bg); color: var(--text-dim);
  border: 1px solid var(--border-soft);
  cursor: help;
}
.refresh-pill .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--text-faint);
  flex-shrink: 0;
}
.refresh-pill.fetching .dot {
  background: var(--accent);
  animation: heartbeat 1s ease-in-out infinite;
}
.refresh-pill.fresh .dot { background: var(--green); }
.refresh-pill.stale .dot { background: var(--yellow); }
.refresh-pill.error  .dot { background: var(--red); }
@keyframes heartbeat {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%      { transform: scale(1.4); opacity: 0.5; }
}

.panel-loading {
  display: flex; align-items: center; gap: 10px;
  padding: 24px; color: var(--text-dim); font-size: 12px;
}
.panel-loading .spinner {
  width: 14px; height: 14px;
  border: 2px solid var(--accent);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

main {
  flex: 1; overflow: auto;
  padding: 16px;
}
.panel { display: none; }
.panel.active { display: block; }

.grid { display: grid; gap: 12px; margin-bottom: 12px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1fr 1fr 1fr; }
@media (max-width: 1100px) { .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 800px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
}
.card-title {
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px;
  color: var(--text-dim); margin-bottom: 12px;
  font-weight: 600;
}

.server-list, .device-list, .session-list { display: flex; flex-direction: column; gap: 8px; }
.server-item, .device-item, .session-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; background: var(--bg-elev);
  border: 1px solid var(--border-soft); border-radius: 4px;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}
.status-dot.connected, .status-dot.alive { background: var(--green); box-shadow: 0 0 4px var(--green); }
.status-dot.disconnected, .status-dot.dead { background: var(--red); }
.status-dot.connecting { background: var(--yellow); }
.status-dot.idle { background: var(--text-faint); }
.status-dot.client-offline { background: var(--orange); }
.status-dot.closed { background: var(--text-faint); }
.status-dot.unknown { background: var(--purple); }

.server-item-info, .device-info, .session-info { flex: 1; min-width: 0; }
.server-item-name { font-family: var(--mono); font-size: 12px; }
.server-item-meta { color: var(--text-dim); font-size: 11px; }
.device-item-desc { font-size: 12px; }
.device-item-id { font-family: var(--mono); color: var(--text-dim); font-size: 11px; }

.kv-list { display: flex; flex-direction: column; gap: 6px; }
.kv-list .kv-row { display: flex; justify-content: space-between; padding: 4px 0; border-bottom: 1px solid var(--border-soft); }
.kv-list .kv-row:last-child { border-bottom: none; }
.kv-list .kv-key { color: var(--text-dim); }
.kv-list .kv-val { font-family: var(--mono); }

.toolbar {
  display: flex; gap: 12px; margin-bottom: 12px;
  flex-wrap: wrap; align-items: center;
}
.filters { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.filters label { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--text-dim); cursor: pointer; }
.filters select, .filters input[type="text"] {
  background: var(--bg-elev); border: 1px solid var(--border); color: var(--text);
  padding: 4px 8px; border-radius: 3px; font-size: 12px; font-family: inherit;
}
.filters input[type="text"] { min-width: 180px; }

.table-wrap { overflow: auto; max-height: 70vh; border: 1px solid var(--border); border-radius: 4px; }
.data-table {
  width: 100%; border-collapse: collapse;
  font-size: 12px; font-family: var(--mono);
}
.data-table thead { position: sticky; top: 0; background: var(--bg-elev); z-index: 1; }
.data-table th, .data-table td { padding: 6px 8px; text-align: left; border-bottom: 1px solid var(--border-soft); white-space: nowrap; }
.data-table th { color: var(--text-dim); font-weight: 600; text-transform: uppercase; font-size: 10px; letter-spacing: 0.5px; }
.data-table tbody tr:hover { background: rgba(88, 166, 255, 0.05); }
.data-table .role-tag {
  padding: 2px 6px; border-radius: 3px; font-size: 10px; text-transform: uppercase; font-weight: 600;
}
.role-tag.role-frontend { background: rgba(88, 166, 255, 0.2); color: var(--accent); }
.role-tag.role-server { background: rgba(188, 140, 255, 0.2); color: var(--purple); }
.role-tag.role-device { background: rgba(63, 185, 80, 0.2); color: var(--green); }
.role-tag.role-other { background: rgba(139, 148, 158, 0.2); color: var(--text-dim); }
.tag-pill {
  display: inline-block; padding: 1px 5px; border-radius: 3px;
  font-size: 10px; background: var(--bg-elev); color: var(--text-dim);
  border: 1px solid var(--border-soft); margin-right: 2px;
}

.legend { display: flex; gap: 16px; margin-top: 8px; font-size: 11px; color: var(--text-dim); }
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot-tx { background: var(--accent); }
.dot-rx { background: var(--orange); }

.dataflow-diagram {
  display: flex; align-items: stretch; gap: 0;
  padding: 20px 10px;
  background: var(--bg-elev);
  border-radius: 4px;
  overflow-x: auto;
}
.df-node {
  flex: 1; min-width: 140px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  text-align: center;
}
.df-node[data-stage="frontend"] { border-color: var(--accent); }
.df-node[data-stage="server"] { border-color: var(--purple); }
.df-node[data-stage="client"] { border-color: var(--green); }
.df-node[data-stage="pty"] { border-color: var(--orange); }
.df-node-title { font-weight: 600; font-size: 13px; margin-bottom: 6px; }
.df-node-sub { color: var(--text-dim); font-size: 11px; line-height: 1.4; }
.df-metric {
  margin-top: 8px; padding: 4px 8px;
  background: var(--bg); border-radius: 3px;
  font-family: var(--mono); font-size: 11px;
  color: var(--text-dim);
}
.df-metric.active { color: var(--green); background: rgba(63, 185, 80, 0.1); }
.df-metric.warning { color: var(--yellow); background: rgba(210, 153, 34, 0.1); }
.df-metric.error { color: var(--red); background: rgba(248, 81, 73, 0.1); }
.df-arrow {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-width: 100px; flex: 0 0 100px;
}
.df-arrow-line {
  width: 100%; height: 2px;
  background: var(--border);
  position: relative;
}
.df-arrow-line::after {
  content: '▶'; position: absolute; right: -8px; top: -8px; color: var(--border);
}
.df-arrow-label {
  font-family: var(--mono); font-size: 10px; color: var(--text-dim);
  margin-bottom: 4px; text-align: center; min-height: 14px;
}

.log-view {
  background: #0a0d12; border: 1px solid var(--border); border-radius: 4px;
  padding: 8px; height: 65vh; overflow-y: auto;
  font-family: var(--mono); font-size: 11px; line-height: 1.5;
}
.log-line { display: flex; gap: 8px; padding: 1px 4px; border-radius: 2px; }
.log-line:hover { background: rgba(255, 255, 255, 0.03); }
.log-time { color: var(--text-faint); flex-shrink: 0; }
.log-source { flex-shrink: 0; font-weight: 600; }
.log-source.source-rttys { color: var(--purple); }
.log-source.source-rtty-go { color: var(--green); }
.log-level { flex-shrink: 0; font-weight: 600; }
.log-level.level-debug { color: var(--text-faint); }
.log-level.level-info { color: var(--accent); }
.log-level.level-warn { color: var(--yellow); }
.log-level.level-error { color: var(--red); }
.log-msg { color: var(--text); word-break: break-word; white-space: pre-wrap; }

.log-count { color: var(--text-dim); font-size: 11px; margin-left: auto; }

.service-control-list { display: flex; flex-direction: column; gap: 18px; }
.control-note {
  font-size: 12px; color: var(--text-dim); line-height: 1.6;
  padding: 10px 12px; background: var(--bg-elev);
  border-left: 3px solid var(--accent); border-radius: 3px;
}
.control-note .mono { font-family: var(--mono); }
.control-note .accent { color: var(--accent); }
.control-note code { background: var(--bg); padding: 1px 4px; border-radius: 2px; }
.service-group { display: flex; flex-direction: column; gap: 6px; }
.service-group-title {
  font-family: var(--mono); font-size: 13px;
  color: var(--text); padding: 4px 2px;
  border-bottom: 1px solid var(--border-soft);
}
.service-group-title .accent { color: var(--accent); }
.service-group-sub {
  font-family: var(--mono); font-size: 11px;
  color: var(--text-dim); padding: 0 2px 4px;
}
.service-row {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; background: var(--bg-elev);
  border: 1px solid var(--border-soft); border-radius: 4px;
  flex-wrap: wrap;
}
.service-row-info { flex: 1 1 200px; min-width: 0; }
.service-row-actions {
  display: flex; gap: 6px; flex-wrap: wrap;
  justify-content: flex-end;
}
.service-row-info .server-item-name { font-family: var(--mono); font-size: 12px; }
.service-row-info .server-item-meta { color: var(--text-dim); font-size: 11px; margin-top: 2px; word-break: break-all; }
.service-kind {
  display: inline-block; padding: 1px 6px; border-radius: 3px;
  font-size: 10px; text-transform: uppercase; font-weight: 600;
  margin-left: 8px; vertical-align: middle;
}
.service-kind.kind-client { background: rgba(63, 185, 80, 0.2); color: var(--green); }
.service-kind.kind-server { background: rgba(188, 140, 255, 0.2); color: var(--purple); }
.btn {
  background: var(--bg-card); color: var(--text); border: 1px solid var(--border);
  padding: 5px 12px; border-radius: 3px; cursor: pointer; font-size: 12px;
  font-family: inherit; transition: background 0.15s;
}
.btn:hover { background: var(--border); }
.btn-primary { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.btn-primary:hover { background: rgba(88, 166, 255, 0.25); }
.btn-danger { background: rgba(248, 81, 73, 0.15); border-color: var(--red); color: var(--red); }
.btn-danger:hover { background: rgba(248, 81, 73, 0.25); }
.btn-warn { background: rgba(210, 153, 34, 0.15); border-color: var(--yellow); color: var(--yellow); }
.btn-warn:hover { background: rgba(210, 153, 34, 0.25); }
.server-selector {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 0 12px; flex-wrap: wrap;
}
.server-selector-label {
  color: var(--text-dim); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600;
  margin-right: 4px;
}
.server-pill {
  background: var(--bg-elev); color: var(--text-dim);
  border: 1px solid var(--border); padding: 4px 12px;
  border-radius: 12px; cursor: pointer; font-size: 12px;
  font-family: var(--mono); transition: all 0.15s;
}
.server-pill:hover { background: var(--bg-card); color: var(--text); }
.server-pill.active {
  background: var(--accent-soft); border-color: var(--accent); color: var(--accent);
  font-weight: 600;
}
.server-device-group { margin-bottom: 10px; }
.server-device-group:last-child { margin-bottom: 0; }
.server-item-selected {
  border-color: var(--accent); background: var(--accent-soft);
}
.server-device-heading {
  font-family: var(--mono); font-size: 11px; color: var(--text-dim);
  padding: 4px 0 6px; border-bottom: 1px solid var(--border-soft);
  margin-bottom: 6px;
}
.muted { color: var(--text-dim); font-size: 12px; }
.muted code { background: var(--bg-elev); padding: 1px 4px; border-radius: 2px; }