:root {
  --bg: #0f1216;
  --panel: #171b21;
  --panel-2: #1e242c;
  --border: #2a323d;
  --text: #d8dee6;
  --text-dim: #8892a0;
  --accent: #4dabf7;
  --ok: #51cf66;
  --warn: #ffd43b;
  --fault: #ff6b6b;
  --stale: #ff922b;
  --simulated: #b197fc;
  --shadow: 0 2px 6px rgba(0,0,0,0.35);
  --radius: 6px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.4 system-ui, -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

body { display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
}

.brand { font-weight: 600; letter-spacing: 0.05em; color: var(--accent); }

.origin-banner {
  padding: 2px 8px;
  background: var(--simulated);
  color: #1a1a1a;
  font-weight: 600;
  font-size: 11px;
  border-radius: var(--radius);
  letter-spacing: 0.03em;
}

.conn {
  padding: 2px 8px;
  border-radius: var(--radius);
  background: var(--panel-2);
  color: var(--text-dim);
  font-size: 11px;
}
.conn.open { color: var(--ok); }
.conn.error { color: var(--fault); }

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

.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 12px;
  padding: 12px;
  flex: 1 1 auto;
  min-height: 0;
}

.pane {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.pane-title {
  padding: 8px 12px;
  font-weight: 600;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pane-body {
  padding: 10px;
  overflow: auto;
  flex: 1 1 auto;
  min-height: 0;
}

.empty {
  color: var(--text-dim);
  font-style: italic;
  padding: 20px;
  text-align: center;
}

.tabs {
  display: flex;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
}
.tab {
  flex: 0 0 auto;
  padding: 8px 16px;
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font: inherit;
  border-bottom: 2px solid transparent;
}
.tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}
.tab:hover:not(.active) { color: var(--text); }

.tab-content { display: none; height: 100%; }
.tab-content.active { display: block; }

.footer {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  padding: 6px 14px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 11px;
  flex: 0 0 auto;
}

/* Device card styles used by U2 */
.device-card {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  cursor: pointer;
  background: var(--panel-2);
  transition: border-color 0.15s;
}
.device-card:hover { border-color: var(--text-dim); }
.device-card.selected { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.device-card .name-row { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.device-card .name { font-weight: 600; margin-right: 4px; }
.device-card .badge {
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 3px;
  background: var(--panel);
  color: var(--text-dim);
  white-space: nowrap;
}
.device-card .badge.fmt   { background: #263038; color: var(--accent); }
.device-card .badge.proto { background: #2a2340; color: var(--simulated); }
.device-card .badge.simulated { background: var(--simulated); color: #1a1a1a; font-weight: 600; }
.device-card .badge.quality { font-weight: 600; }
.device-card .badge.quality-OK      { color: #1a1a1a; background: var(--ok); }
.device-card .badge.quality-STALE   { color: #1a1a1a; background: var(--stale); }
.device-card .badge.quality-FAULT   { color: #1a1a1a; background: var(--fault); }
.device-card .badge.quality-UNKNOWN { color: var(--text-dim); background: var(--panel); }

.device-card .metric-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 8px;
  color: var(--text);
}
.device-card .metric-label {
  font-size: 11px;
  color: var(--text-dim);
  flex: 0 0 auto;
}
.device-card .metric-value {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 14px;
  font-weight: 600;
  min-width: 80px;
}
.device-card .sparkline-slot { margin-left: auto; color: var(--accent); }
.device-card .sparkline { display: block; }

.device-card .meta {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.device-card .meta .dot { flex: 1 1 auto; border-bottom: 1px dashed var(--border); }
.device-card .meta .type { font-weight: 600; letter-spacing: 0.03em; }

/* Info-graphs pane (U3) */
.ig-toolbar {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 4px 10px; color: var(--text-dim); font-size: 11px;
}
.ig-hint { color: var(--text); }
.ig-origin { margin-left: auto; background: var(--simulated); color: #1a1a1a; padding: 2px 8px; border-radius: 3px; font-weight: 600; }

.ig-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: 220px;
  gap: 10px;
}
.chart-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.chart-head {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px; border-bottom: 1px solid var(--border);
  font-size: 11px; color: var(--text-dim); background: var(--panel);
}
.chart-title { color: var(--text); font-weight: 600; flex: 1 1 auto; }
.chart-scope { padding: 1px 6px; border-radius: 3px; background: var(--panel-2); color: var(--accent); }
.chart-sim   { padding: 1px 6px; border-radius: 3px; background: var(--simulated); color: #1a1a1a; font-weight: 600; }
.chart-body {
  position: relative; flex: 1 1 auto; padding: 6px;
  min-height: 0; overflow: hidden;
}
.chart-body canvas { max-width: 100%; max-height: 100%; }
.gauge-value {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700;
  color: var(--text); pointer-events: none;
  font-family: ui-monospace, monospace;
}
.ribbon { padding: 6px 8px; height: 100%; }
.ribbon-legend { display: flex; gap: 10px; margin-bottom: 6px; font-size: 11px; color: var(--text-dim); }
.ribbon-legend .sw { display: inline-block; width: 10px; height: 10px; margin-right: 4px; vertical-align: middle; border-radius: 2px; }

/* Energy summary card (WP-ST-14 U6, API-backed) */
.energy-summary { padding: 6px 8px; height: 100%; overflow: auto; font-size: 11px; }
.energy-summary .energy-head { color: var(--text-dim); margin-bottom: 6px; }
.energy-summary .energy-foot { color: var(--text-dim); margin-top: 6px; font-size: 10px; }
.energy-summary .energy-row {
  display: grid; grid-template-columns: 1.4fr 1fr 1.2fr 1.6fr;
  gap: 6px; padding: 4px 0; border-bottom: 1px solid var(--border);
  font-family: ui-monospace, monospace;
}
.energy-summary .ek { color: var(--text); font-weight: 600; }
.energy-summary .kwh { color: var(--accent); text-align: right; }
.energy-summary .src { color: var(--text-dim); }
.energy-summary .comp { text-align: center; padding: 0 6px; border-radius: 3px; }
.energy-summary .comp-complete { background: rgba(81, 207, 102, 0.15); color: #51cf66; }
.energy-summary .comp-partial  { background: rgba(255, 212, 59, 0.15); color: #ffd43b; }
.energy-summary .comp-sparse   { background: rgba(255, 107, 107, 0.15); color: #ff6b6b; }

/* Time-serial pane (U4) */
.ts-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 6px 4px 10px; font-size: 11px; color: var(--text-dim);
}
.ts-toolbar label { display: flex; align-items: center; gap: 4px; }
.ts-toolbar select, .ts-toolbar button, .ts-toolbar input[type=checkbox] {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 3px; padding: 3px 6px; font: inherit;
}
.ts-toolbar button { cursor: pointer; }
.ts-toolbar button:hover { background: var(--panel); border-color: var(--accent); }
.ts-toolbar .ts-pageinfo { color: var(--text); }
.ts-toolbar .ts-origin { margin-left: auto; background: var(--simulated); color: #1a1a1a; padding: 2px 8px; border-radius: 3px; font-weight: 600; }

.ts-table-wrap { overflow: auto; height: calc(100% - 50px); border: 1px solid var(--border); border-radius: var(--radius); }
.ts-table {
  width: 100%; border-collapse: collapse; font-size: 12px;
}
.ts-table th, .ts-table td { padding: 4px 8px; border-bottom: 1px solid var(--border); text-align: left; }
.ts-table th { background: var(--panel-2); color: var(--text-dim); position: sticky; top: 0; z-index: 1; }
.ts-table td.num, .ts-table th.num { text-align: right; }
.ts-table td.mono { font-family: ui-monospace, monospace; color: var(--text-dim); }
.ts-table tr.q-STALE td { color: var(--stale); }
.ts-table tr.q-FAULT td { color: var(--fault); }
.qbadge { padding: 1px 5px; border-radius: 2px; font-weight: 600; font-size: 10px; }
.qbadge.q-OK      { background: var(--ok);      color: #1a1a1a; }
.qbadge.q-STALE   { background: var(--stale);   color: #1a1a1a; }
.qbadge.q-FAULT   { background: var(--fault);   color: #1a1a1a; }
.qbadge.q-UNKNOWN { background: var(--panel);   color: var(--text-dim); }
.ts-table td.empty { text-align: center; color: var(--text-dim); padding: 20px; font-style: italic; }

/* Popup shell + situation popup (U6) */
.popup-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  backdrop-filter: blur(2px);
}
.popup {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 480px;
  max-width: 640px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.situation-popup { border-top: 4px solid var(--warn); }
.situation-popup.severity-CRITICAL { border-top-color: var(--fault); }
.situation-popup.severity-ERROR    { border-top-color: var(--fault); }
.situation-popup.severity-WARN     { border-top-color: var(--warn); }
.situation-popup.severity-INFO     { border-top-color: var(--accent); }

.popup-head {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
}
.popup-head .sev-icon { font-size: 22px; }
.popup-head .sev-label { font-weight: 700; letter-spacing: 0.05em; color: var(--text); }
.popup-head .popup-title { flex: 1 1 auto; color: var(--text-dim); }
.popup-head .queue-badge {
  background: var(--simulated); color: #1a1a1a;
  padding: 3px 8px; border-radius: 3px; font-size: 11px; font-weight: 700;
}

.popup-body { padding: 16px; }
.popup-row {
  display: flex; gap: 12px; padding: 6px 0;
  border-bottom: 1px dashed var(--border);
}
.popup-row:last-child { border-bottom: none; }
.popup-row .lbl { flex: 0 0 130px; color: var(--text-dim); font-size: 12px; padding-top: 2px; }
.popup-row .val { flex: 1 1 auto; color: var(--text); font-size: 13px; }
.popup-row .val.mono { font-family: ui-monospace, monospace; font-size: 11px; }
.popup-row .val.placeholder { color: var(--text-dim); font-style: italic; }
.popup-iter2 { margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--border); }

.trig-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.trig-table th, .trig-table td { padding: 3px 6px; border-bottom: 1px solid var(--border); text-align: left; }
.trig-table th { color: var(--text-dim); font-weight: normal; }
.trig-table td.num, .trig-table th.num { text-align: right; font-family: ui-monospace, monospace; }

.popup-actions {
  display: flex; justify-content: flex-end; gap: 8px;
  padding: 12px 16px;
  background: var(--panel-2);
  border-top: 1px solid var(--border);
}
.btn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  font: inherit;
}
.btn:hover { border-color: var(--accent); }
.btn-primary   { background: var(--accent); color: #1a1a1a; border-color: var(--accent); font-weight: 600; }
.btn-secondary { background: var(--panel-2); }
.popup-foot {
  display: flex; gap: 6px; padding: 6px 16px;
  background: var(--panel-2); border-top: 1px solid var(--border);
  font-size: 10px;
}
.popup-foot .chip { background: var(--panel); color: var(--text-dim); padding: 2px 6px; border-radius: 2px; }
.popup-foot .chip:first-child { background: var(--simulated); color: #1a1a1a; font-weight: 600; }