:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --panel-2: #f0f2f5;
  --text: #15181d;
  --muted: #5f6774;
  --border: #dde1e7;
  --accent: #3d5afe;
  --accent-text: #ffffff;
  --danger: #c5221f;
  --ok: #188038;
  --warn: #b06000;
  --user-bubble: #e8ecff;
  --bot-bubble: #f0f2f5;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 2px 8px rgba(0, 0, 0, 0.04);
  /* charts (validated palette, light surface #ffffff) */
  --chart-surface: #ffffff;
  --chart-grid: #e1e0d9;
  --chart-axis: #c3c2b7;
  --chart-muted: #6b6a65;
  --series-1: #2a78d6;
  --series-2: #eb6834;
  --series-3: #1baf7a;
  --series-4: #eda100;
  --series-5: #e87ba4;
  --series-6: #008300;
  --series-other: #a3a29b;
  --status-good: #0ca30c;
  --status-critical: #d03b3b;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    --bg: #0f1115;
    --panel: #171a20;
    --panel-2: #1f232b;
    --text: #e8eaed;
    --muted: #9aa0a6;
    --border: #2c313a;
    --accent: #7b8cff;
    --accent-text: #0f1115;
    --danger: #f28b82;
    --ok: #81c995;
    --warn: #fdd663;
    --user-bubble: #26305a;
    --bot-bubble: #232730;
    --shadow: none;
    --chart-surface: #171a20;
    --chart-grid: #2a2e36;
    --chart-axis: #3a3f49;
    --chart-muted: #9a9890;
    --series-1: #3987e5;
    --series-2: #d95926;
    --series-3: #199e70;
    --series-4: #c98500;
    --series-5: #d55181;
    --series-6: #008300;
    --series-other: #6d6c66;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1115;
  --panel: #171a20;
  --panel-2: #1f232b;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --border: #2c313a;
  --accent: #7b8cff;
  --accent-text: #0f1115;
  --danger: #f28b82;
  --ok: #81c995;
  --warn: #fdd663;
  --user-bubble: #26305a;
  --bot-bubble: #232730;
  --shadow: none;
  --chart-surface: #171a20;
  --chart-grid: #2a2e36;
  --chart-axis: #3a3f49;
  --chart-muted: #9a9890;
  --series-1: #3987e5;
  --series-2: #d95926;
  --series-3: #199e70;
  --series-4: #c98500;
  --series-5: #d55181;
  --series-6: #008300;
  --series-other: #6d6c66;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

header.top {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  flex-wrap: wrap;
}
header.top h1 { font-size: 16px; margin: 0; font-weight: 650; }
header.top nav { display: flex; gap: 4px; flex-wrap: wrap; }
header.top nav button { background: none; color: var(--muted); border: none; }
header.top nav button.active { color: var(--text); background: var(--panel-2); }
header.top .spacer { flex: 1; }

main { display: grid; grid-template-columns: 260px 1fr 380px; min-height: calc(100vh - 53px); }
main.two-col { grid-template-columns: 360px 1fr; }
main.one-col { display: block; padding: 20px; max-width: 1200px; margin: 0 auto; }

aside, section.editor, section.live { padding: 16px; min-width: 0; }
aside { border-right: 1px solid var(--border); background: var(--panel); }
section.live { border-left: 1px solid var(--border); background: var(--panel); display: flex; flex-direction: column; }

.list { list-style: none; padding: 0; margin: 12px 0 0; }
.list li { padding: 10px 12px; border-radius: 8px; cursor: pointer; margin-bottom: 2px; }
.list li:hover { background: var(--panel-2); }
.list li.selected { background: var(--user-bubble); }
.list li .sub { color: var(--muted); font-size: 12px; }

button {
  font: inherit;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}
button:hover { background: var(--panel-2); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.primary:hover { filter: brightness(1.08); }
button.danger { color: var(--danger); }
button.small { padding: 3px 9px; font-size: 12.5px; }
button:disabled { opacity: 0.5; cursor: default; }
button.full { width: 100%; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  min-width: 0;
}
.card h3 { margin: 0 0 12px; font-size: 14px; }
.card-head { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.card-head h3 { margin: 0; flex: 1; }
.help { color: var(--muted); font-size: 12.5px; margin: 4px 0 0; }

label { display: block; font-weight: 550; margin: 12px 0 4px; }
label .hint { font-weight: 400; color: var(--muted); font-size: 12px; margin-left: 6px; }
input[type="text"], input[type="number"], input[type="url"], input[type="password"], input[type="search"], select, textarea {
  width: 100%;
  font: inherit;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}
textarea { resize: vertical; min-height: 80px; }
textarea.code { font-family: ui-monospace, Consolas, monospace; font-size: 12.5px; min-height: 120px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.row3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.check { display: flex; align-items: center; gap: 8px; margin-top: 10px; font-weight: 500; }
.checks { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.actions { display: flex; gap: 8px; margin-top: 16px; align-items: center; flex-wrap: wrap; position: sticky; bottom: 0; background: var(--bg); padding: 10px 0; }
.status-msg { color: var(--muted); font-size: 13px; }
.status-msg.err { color: var(--danger); }

.call-controls { display: flex; gap: 8px; }
.call-state { font-size: 13px; color: var(--muted); margin: 10px 0; display: flex; align-items: center; gap: 8px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.dot.live { background: var(--ok); }
.dot.connecting { background: var(--warn); }

.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 12px; }
.metric { background: var(--panel-2); border-radius: 8px; padding: 8px 10px; min-width: 0; }
.metric .k { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.metric .v { font-size: 18px; font-weight: 650; }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.tile { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.tile .k { font-size: 12.5px; color: var(--muted); }
.tile .v { font-size: 26px; font-weight: 650; margin-top: 2px; }
.tile .s { font-size: 12px; color: var(--muted); }

.transcript { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; padding: 4px 0; min-height: 200px; }
.bubble { padding: 8px 12px; border-radius: 12px; max-width: 88%; white-space: pre-wrap; word-wrap: break-word; }
.bubble.user { background: var(--user-bubble); align-self: flex-end; }
.bubble.assistant { background: var(--bot-bubble); align-self: flex-start; }
.bubble.tool { background: none; border: 1px dashed var(--border); color: var(--muted); font-size: 12px; align-self: center; }
.bubble .at { display: block; font-size: 11px; color: var(--muted); }

.level { height: 4px; background: var(--panel-2); border-radius: 2px; overflow: hidden; margin-bottom: 10px; }
.level > div { height: 100%; width: 0; background: var(--ok); transition: width 60ms linear; }

table.data { width: 100%; border-collapse: collapse; }
table.data td, table.data th { padding: 7px 8px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; vertical-align: top; }
table.data th { color: var(--muted); font-weight: 550; }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }
table.data tr.clickable { cursor: pointer; }
table.data tr.clickable:hover td { background: var(--panel-2); }
table.data tr.selected td { background: var(--user-bubble); }

.badge { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; font-weight: 600; }
.badge.good { color: var(--status-good); }
.badge.bad { color: var(--status-critical); }
.badge .icon { font-size: 13px; }

pre.snippet {
  background: var(--panel-2);
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 12.5px;
  margin: 0;
}

.empty { color: var(--muted); text-align: center; padding: 40px 0; }
.filters { display: flex; gap: 12px; align-items: end; flex-wrap: wrap; margin-bottom: 16px; }
.filters label { margin: 0 0 4px; font-size: 12.5px; }
.filters select { width: auto; min-width: 160px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ---- charts ---- */
.chart { position: relative; width: 100%; }
.chart svg { display: block; width: 100%; overflow: visible; }
.chart .grid-line { stroke: var(--chart-grid); stroke-width: 1; }
.chart .axis-line { stroke: var(--chart-axis); stroke-width: 1; }
.chart .tick { fill: var(--chart-muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart .label { fill: var(--muted); font-size: 11.5px; }
.chart .end-label { fill: var(--text); font-size: 12px; font-weight: 600; }
.chart .hit { fill: transparent; cursor: default; }
.chart .mark.dim { opacity: 0.45; }
.chart.loading { opacity: 0.5; }
.chart .crosshair { stroke: var(--chart-axis); stroke-width: 1; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 12.5px; color: var(--muted); margin: 0 0 8px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { display: inline-block; width: 12px; height: 10px; border-radius: 2px; }
.legend i.line { height: 2px; border-radius: 1px; width: 14px; }
.chart-tooltip {
  position: fixed;
  z-index: 50;
  pointer-events: none;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.16);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 12.5px;
  min-width: 120px;
}
.chart-tooltip .t { color: var(--muted); margin-bottom: 4px; }
.chart-tooltip .r { display: flex; align-items: center; gap: 8px; }
.chart-tooltip .r b { font-variant-numeric: tabular-nums; }
.chart-tooltip .r i { display: inline-block; width: 12px; height: 2px; border-radius: 1px; }

@media (max-width: 1100px) {
  main { grid-template-columns: 220px 1fr; }
  section.live { grid-column: 1 / -1; border-left: none; border-top: 1px solid var(--border); }
  .grid2 { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  main, main.two-col { grid-template-columns: 1fr; }
  main.one-col { padding: 16px; }
  aside { border-right: none; border-bottom: 1px solid var(--border); }
  .row, .row3 { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr 1fr; }
}