:root {
  --bg: #f7f7f8;
  --panel: #ffffff;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --accent: #2563eb;
  --code-bg: #f9fafb;
  --mark: #fde68a;

  /* role colours, carried over from the notebook's STYLE map */
  --system-fg: #6b7280;      --system-bg: #f3f4f6;
  --user-fg: #1d4ed8;        --user-bg: #eff6ff;
  --assistant-fg: #047857;   --assistant-bg: #ecfdf5;
  --tool_call-fg: #b45309;   --tool_call-bg: #fffbeb;
  --tool_result-fg: #7c3aed; --tool_result-bg: #faf5ff;
  --reasoning-fg: #be185d;   --reasoning-bg: #fdf2f8;
  --other-fg: #0f766e;       --other-bg: #f0fdfa;

  --j-key: #1d4ed8; --j-str: #047857; --j-num: #b45309; --j-bool: #7c3aed; --j-null: #9ca3af;

  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1117; --panel: #161b22; --border: #30363d; --text: #e6edf3; --muted: #8b949e;
    --accent: #58a6ff; --code-bg: #0d1117; --mark: #9a6700;
    --system-fg: #9ca3af;      --system-bg: #1f2328;
    --user-fg: #79b8ff;        --user-bg: #0f1d33;
    --assistant-fg: #56d364;   --assistant-bg: #0e2318;
    --tool_call-fg: #f0b45a;   --tool_call-bg: #2a1f0b;
    --tool_result-fg: #c4a5ff; --tool_result-bg: #1f1631;
    --reasoning-fg: #f78fc0;   --reasoning-bg: #2a1020;
    --other-fg: #5eead4;       --other-bg: #0b2422;
    --j-key: #79b8ff; --j-str: #7ee787; --j-num: #f0b45a; --j-bool: #c4a5ff; --j-null: #6e7681;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1117; --panel: #161b22; --border: #30363d; --text: #e6edf3; --muted: #8b949e;
  --accent: #58a6ff; --code-bg: #0d1117; --mark: #9a6700;
  --system-fg: #9ca3af;      --system-bg: #1f2328;
  --user-fg: #79b8ff;        --user-bg: #0f1d33;
  --assistant-fg: #56d364;   --assistant-bg: #0e2318;
  --tool_call-fg: #f0b45a;   --tool_call-bg: #2a1f0b;
  --tool_result-fg: #c4a5ff; --tool_result-bg: #1f1631;
  --reasoning-fg: #f78fc0;   --reasoning-bg: #2a1020;
  --other-fg: #5eead4;       --other-bg: #0b2422;
  --j-key: #79b8ff; --j-str: #7ee787; --j-num: #f0b45a; --j-bool: #c4a5ff; --j-null: #6e7681;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.5 var(--sans); }
body:has(> main.split) { height: 100vh; display: flex; flex-direction: column; }
a { color: var(--accent); }
button, .btn {
  font: 500 13px var(--sans); color: var(--text); background: var(--panel);
  border: 1px solid var(--border); border-radius: 6px; padding: 5px 10px; cursor: pointer;
}
button:hover, .btn:hover { border-color: var(--accent); }
button.ghost { background: transparent; }
select, input[type="search"] {
  font: 13px var(--sans); color: var(--text); background: var(--panel);
  border: 1px solid var(--border); border-radius: 6px; padding: 5px 8px;
}

/* ---------- layout ---------- */
.topbar {
  display: flex; align-items: center; gap: 16px; padding: 10px 16px;
  border-bottom: 1px solid var(--border); background: var(--panel);
}
.brand { font: 700 17px var(--sans); letter-spacing: -.01em; }
.logo { font-family: var(--mono); color: var(--accent); }
.tagline { color: var(--muted); font-size: 13px; flex: 1; }

.split { display: grid; grid-template-columns: var(--left, 38%) 6px minmax(0, 1fr); flex: 1; min-height: 0; }
.brand { color: var(--text); text-decoration: none; }
.toplinks { display: flex; gap: 14px; font-size: 13px; }
.toplinks a { color: var(--muted); text-decoration: none; }
.toplinks a:hover { color: var(--accent); }
.ad-bar { display: flex; justify-content: center; align-items: center; min-height: 90px; max-height: 110px; overflow: hidden;
  background: var(--panel); border-bottom: 1px solid var(--border); }
.ad-bar ins { width: 100%; max-width: 970px; }
.split.editor-hidden .input-pane { visibility: hidden; }
.splitter { cursor: col-resize; background: var(--border); background-clip: content-box; padding: 0 2.5px; touch-action: none; }
.splitter:hover, .splitter:focus-visible, .splitter.dragging { background: var(--accent); padding: 0 1.5px; outline: none; }
body.resizing { cursor: col-resize; user-select: none; }
body.resizing iframe, body.resizing textarea { pointer-events: none; }
.pane { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.input-pane { background: var(--panel); overflow: hidden; }
.toolbar { display: flex; align-items: center; gap: 6px; padding: 8px 12px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.sep { width: 1px; height: 20px; background: var(--border); margin: 0 4px; }
#input {
  flex: 1; resize: none; border: 0; outline: 0; padding: 12px; background: var(--code-bg); color: var(--text);
  font: 12.5px/1.55 var(--mono); tab-size: 2;
}
#input.dragover { outline: 2px dashed var(--accent); outline-offset: -8px; }
.status { padding: 6px 12px; font-size: 12px; color: var(--muted); border-top: 1px solid var(--border); min-height: 30px; }
.status.error { color: #dc2626; }

.view-toolbar { justify-content: space-between; background: var(--panel); }
.tabs { display: flex; gap: 2px; }
.tab { border: 0; background: transparent; border-radius: 6px; color: var(--muted); }
.tab.active { background: var(--bg); color: var(--text); }
.record-nav { display: flex; gap: 4px; align-items: center; }
.record-nav select { max-width: 320px; }
.view { flex: 1; overflow: auto; padding: 16px 20px 80px; }
.empty { color: var(--muted); text-align: center; margin-top: 20vh; }

@media (max-width: 800px) {
  .split { grid-template-columns: minmax(0, 1fr) !important; height: auto; }
  .splitter { display: none; }
  .split.editor-hidden .input-pane { visibility: visible; }
  .input-pane { height: 45vh; border-bottom: 1px solid var(--border); }
  .view { padding: 12px 16px 60px; }
  .tagline { display: none; }
  body:has(> main.split) { height: auto; display: block; }
  .ad-bar { min-height: 60px; }
}

/* ---------- trace header ---------- */
.trace-head h2 { margin: 0 0 6px; font-size: 16px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.chip {
  max-width: 100%; overflow-wrap: anywhere;
  font: 12px var(--mono); padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); background: var(--panel);
}
.chip b { font-weight: 600; color: var(--muted); }
.chip.good { border-color: #16a34a; color: #16a34a; }
.chip.bad { border-color: #dc2626; color: #dc2626; }

/* timeline strip: one segment per turn, width ~ size */
.timeline {
  display: flex; gap: 2px; height: 22px; margin: 8px 0 4px; border-radius: 4px; overflow: hidden;
}
.timeline .seg { min-width: 4px; cursor: pointer; opacity: .85; }
.timeline .seg:hover { opacity: 1; outline: 2px solid var(--text); outline-offset: -2px; }
.legend { display: flex; gap: 12px; flex-wrap: wrap; font-size: 12px; color: var(--muted); margin-bottom: 12px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 4px; vertical-align: -1px; }

.filters { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; position: sticky; top: -16px; z-index: 2;
  background: var(--bg); padding: 8px 0; margin-bottom: 4px; }
.filters .toggle { font: 12px var(--mono); border-radius: 999px; padding: 3px 10px; }
.filters .toggle.off { opacity: .4; text-decoration: line-through; }
.filters input[type="search"] { flex: 1; min-width: 160px; }

/* ---------- turns ---------- */
.turn {
  margin: 8px 0; border-left: 4px solid var(--fg); background: var(--bg-k); border-radius: 0 8px 8px 0;
  padding: 6px 12px 8px; scroll-margin-top: 60px; transition: box-shadow .15s;
}
.turn.flash, .turn.linked { box-shadow: 0 0 0 2px var(--fg); }
.turn header { display: flex; align-items: center; gap: 8px; font: 600 11px/1.8 var(--mono); color: var(--fg); }
.turn header .role { text-transform: uppercase; letter-spacing: .04em; }
.turn header .name { text-transform: none; font-size: 12px; }
.turn header .meta { margin-left: auto; color: var(--muted); font-weight: 400; display: flex; gap: 8px; align-items: center; }
.turn header .link { cursor: pointer; text-decoration: underline dotted; }
.turn header button { font-size: 11px; padding: 0 6px; background: transparent; }
.turn .text { margin: 2px 0 0; white-space: pre-wrap; word-break: break-word; font: 13px/1.55 var(--mono); }
.turn .text.clamped { max-height: 14em; overflow: hidden; mask-image: linear-gradient(#000 70%, transparent); }
.turn .more { font-size: 12px; margin-top: 4px; }
.turn.err { --fg: #dc2626; }
.turn details.fold > summary { cursor: pointer; color: var(--muted); font-size: 12px; }
mark { background: var(--mark); color: inherit; border-radius: 2px; }

.k-system      { --fg: var(--system-fg);      --bg-k: var(--system-bg); }
.k-user        { --fg: var(--user-fg);        --bg-k: var(--user-bg); }
.k-assistant   { --fg: var(--assistant-fg);   --bg-k: var(--assistant-bg); }
.k-tool_call   { --fg: var(--tool_call-fg);   --bg-k: var(--tool_call-bg); }
.k-tool_result { --fg: var(--tool_result-fg); --bg-k: var(--tool_result-bg); }
.k-reasoning   { --fg: var(--reasoning-fg);   --bg-k: var(--reasoning-bg); }
.k-other       { --fg: var(--other-fg);       --bg-k: var(--other-bg); }
.sw-system { background: var(--system-fg); } .sw-user { background: var(--user-fg); }
.sw-assistant { background: var(--assistant-fg); } .sw-tool_call { background: var(--tool_call-fg); }
.sw-tool_result { background: var(--tool_result-fg); } .sw-reasoning { background: var(--reasoning-fg); }
.sw-other { background: var(--other-fg); }

/* ---------- JSON tree ---------- */
.jt { font: 12.5px/1.55 var(--mono); word-break: break-word; }
.jt details { display: inline; }
.jt details > summary { display: inline; cursor: pointer; list-style: none; }
.jt details > summary::-webkit-details-marker { display: none; }
.jt details > summary::before { content: "▸"; display: inline-block; width: 1em; color: var(--muted); }
.jt details[open] > summary::before { content: "▾"; }
.jt details[open] > summary .j-sum { display: none; }
.jt .j-sum { color: var(--muted); font-style: italic; }
.jt .j-kids { padding-left: 1.4em; border-left: 1px dotted var(--border); margin-left: .35em; }
.jt .j-row { white-space: pre-wrap; }
.j-key { color: var(--j-key); } .j-str { color: var(--j-str); } .j-num { color: var(--j-num); }
.j-bool { color: var(--j-bool); } .j-null { color: var(--j-null); }

/* ---------- stats / tools ---------- */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; margin-bottom: 18px; }
.tile { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; }
.tile .v { font: 600 22px var(--sans); font-variant-numeric: tabular-nums; }
.tile .l { color: var(--muted); font-size: 12px; }
h3 { font-size: 14px; margin: 20px 0 8px; }
.stack { display: flex; height: 18px; border-radius: 4px; overflow: hidden; gap: 1px; }
table { border-collapse: collapse; width: 100%; font-size: 13px; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; }
th, td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 12px; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
td code, .tool-card code { font-family: var(--mono); font-size: 12.5px; }
.bar { height: 8px; background: var(--tool_call-fg); border-radius: 2px; }
.tool-card { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; margin-bottom: 10px; }
.tool-card h4 { margin: 0 0 4px; font: 600 14px var(--mono); color: var(--tool_call-fg); }
.tool-card p { margin: 0 0 8px; color: var(--muted); white-space: pre-wrap; }
.tool-card .unused { color: var(--muted); font: 12px var(--sans); }
.req { color: #dc2626; }
.json-actions { display: flex; gap: 6px; margin-bottom: 10px; }

/* ---------- span traces ---------- */
:root {
  --sk-llm: var(--assistant-fg); --sk-tool: var(--tool_call-fg); --sk-agent: var(--user-fg);
  --sk-retriever: var(--tool_result-fg); --sk-embedding: var(--other-fg); --sk-reranker: var(--other-fg);
  --sk-guardrail: var(--reasoning-fg); --sk-evaluator: var(--reasoning-fg); --sk-chain: #8b95a5; --sk-span: #a3a9b5; --sk-event: #a3a9b5;
}
.sk-llm { --sk: var(--sk-llm); } .sk-tool { --sk: var(--sk-tool); } .sk-agent { --sk: var(--sk-agent); }
.sk-retriever { --sk: var(--sk-retriever); } .sk-embedding { --sk: var(--sk-embedding); } .sk-reranker { --sk: var(--sk-reranker); }
.sk-guardrail { --sk: var(--sk-guardrail); } .sk-evaluator { --sk: var(--sk-evaluator); } .sk-chain { --sk: var(--sk-chain); }
.sk-span { --sk: var(--sk-span); } .sk-event { --sk: var(--sk-event); }
.legend i[class^="sk-"], .bar[class*="sk-"] { background: var(--sk); }

.subtabs { display: flex; gap: 4px; margin: 4px 0 12px; }
.subtabs button { border-radius: 999px; }
.subtabs button.active { border-color: var(--accent); color: var(--accent); }
.muted { color: var(--muted); font-weight: 400; }
.hint { color: var(--muted); font-size: 12px; margin: 8px 0; }

.wf { border: 1px solid var(--border); border-radius: 8px; background: var(--panel); overflow: hidden; }
.wf-row {
  display: grid; grid-template-columns: minmax(220px, 42%) 1fr 64px; align-items: center; gap: 10px;
  padding: 3px 10px; border-bottom: 1px solid var(--border); cursor: pointer; font-size: 13px;
}
.wf-row:hover { background: var(--bg); }
.wf-row.sel { background: var(--bg); box-shadow: inset 3px 0 0 var(--accent); }
.wf-row.err .nm { color: #dc2626; }
.wf-axis { cursor: default; font-size: 11px; position: sticky; top: -16px; z-index: 1; background: var(--panel); }
.wf-axis .wf-track span { position: absolute; transform: translateX(-50%); color: var(--muted); white-space: nowrap; }
.wf-axis .wf-track span:first-child { transform: none; }
.wf-axis .wf-track span:last-child { transform: translateX(-100%); }
.wf-name { display: flex; align-items: center; gap: 6px; min-width: 0; white-space: nowrap; overflow: hidden; }
.wf-name .nm { flex: 0 0 auto; max-width: 65%; overflow: hidden; text-overflow: ellipsis; font-family: var(--mono); font-size: 12.5px; }
.wf-name .muted { flex: 0 1 auto; min-width: 0; font-size: 11.5px; overflow: hidden; text-overflow: ellipsis; }
.caret { width: 12px; flex: none; color: var(--muted); font-size: 11px; text-align: center; }
.kb {
  flex: none; font: 600 10px/1.6 var(--mono); text-transform: uppercase; letter-spacing: .03em;
  color: var(--sk); border: 1px solid var(--sk); border-radius: 4px; padding: 0 4px;
}
.err-dot { flex: none; font: 600 10px/1.6 var(--mono); color: #fff; background: #dc2626; border-radius: 4px; padding: 0 4px; }
.wf-track { position: relative; height: 16px; }
.wf-bar { position: absolute; top: 3px; height: 10px; border-radius: 2px; background: var(--sk); min-width: 2px; }
.wf-row.err .wf-bar { background: repeating-linear-gradient(45deg, #dc2626 0 4px, #f87171 4px 8px); }
.wf-dur { text-align: right; font: 11.5px var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.wf-detail { padding: 10px 14px 14px; border-bottom: 1px solid var(--border); background: var(--bg); cursor: auto; }
.io-sep { font: 600 11px var(--sans); text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 12px 0 2px; }
.io-text { margin: 4px 0; white-space: pre-wrap; word-break: break-word; font: 13px/1.55 var(--mono); }
.wf-detail details.fold { margin-top: 10px; }
.wf-detail details.fold > summary { cursor: pointer; color: var(--muted); font-size: 12px; }
table.attrs { margin-top: 6px; font-size: 12px; }
table.attrs td:first-child { width: 35%; word-break: break-all; }
.attr-v { font-family: var(--mono); white-space: pre-wrap; word-break: break-word; }

@media (max-width: 800px) {
  .wf-row { grid-template-columns: minmax(150px, 55%) 1fr 52px; gap: 6px; padding: 3px 6px; }
  .wf-name .muted { display: none; }
}
#sampleSel { max-width: 150px; }

/* ---------- content pages (formats, privacy) ---------- */
.doc { max-width: 820px; margin: 0 auto; padding: 24px 16px 48px; font-size: 15px; line-height: 1.65; }
.doc h1 { font-size: 28px; letter-spacing: -.02em; margin: 8px 0 12px; }
.doc h2 { font-size: 19px; margin: 32px 0 8px; }
.doc h3 { font-size: 15px; margin: 20px 0 4px; }
.doc .lede { font-size: 16.5px; color: var(--muted); }
.doc code, .doc kbd { font: 13px var(--mono); background: var(--panel); border: 1px solid var(--border); border-radius: 4px; padding: 0 4px; }
.doc table { margin: 10px 0; font-size: 14px; }
.doc td:first-child { white-space: nowrap; font-weight: 500; }
.doc pre.example { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px;
  font: 12.5px/1.55 var(--mono); overflow-x: auto; }
.doc li { margin: 4px 0; }
.ad-slot { margin: 28px 0; min-height: 90px; text-align: center; }
.site-footer { text-align: center; color: var(--muted); font-size: 13px; padding: 20px 16px 32px; border-top: 1px solid var(--border); }
.site-footer a { color: var(--muted); }
@media (max-width: 800px) {
  .doc td:first-child { white-space: normal; }
  .toplinks { margin-left: auto; }
}