:root {
  --bg: #0f1117;
  --bg-panel: #161923;
  --bg-card: #1b1f2b;
  --border: #2a2f3d;
  --text: #e6e8ef;
  --text-muted: #8a90a3;
  --accent: #6ea8fe;
  --accent-soft: rgba(110, 168, 254, 0.15);
  --ok: #4ade80;
  --warn: #fbbf24;
  --error: #f87171;
  --radius: 10px;
  --mono: "SF Mono", "Menlo", "Consolas", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.topbar-title { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.topbar-title h1 { font-size: 1.15rem; margin: 0; }
.subtitle { color: var(--text-muted); font-size: 0.85rem; }

.dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.topbar-home-link {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-decoration: none;
  white-space: nowrap;
}
.topbar-home-link:hover { color: var(--accent); }

.status-banner {
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  font-size: 0.8rem;
  border: 1px solid var(--border);
}
.status-unknown { color: var(--text-muted); }
.status-ok { color: var(--ok); border-color: var(--ok); background: rgba(74, 222, 128, 0.08); }
.status-warn { color: var(--warn); border-color: var(--warn); background: rgba(251, 191, 36, 0.08); }

.byok-banner {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0.75rem 1.5rem 0;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--warn);
  border-radius: var(--radius);
  background: rgba(251, 191, 36, 0.08);
  flex-wrap: wrap;
}
.byok-banner label { font-size: 0.82rem; color: var(--text); font-weight: 600; white-space: nowrap; }
.byok-banner input {
  flex: 1 1 220px;
  min-width: 180px;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.82rem;
}
.byok-banner #byok-status { font-size: 0.78rem; }

.lang-note {
  margin: 0.75rem 1.5rem 0;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-size: 0.82rem;
  max-width: 900px;
}
.lang-note a { color: var(--accent); }

.tabs {
  display: flex;
  gap: 0.5rem;
  padding: 1rem 1.5rem 0;
}

.tab-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: var(--radius) var(--radius) 0 0;
  cursor: pointer;
  font-size: 0.9rem;
}
.tab-btn.active { color: var(--text); background: var(--bg-panel); border-bottom-color: var(--bg-panel); }

main { padding: 0 1.5rem 3rem; max-width: 1100px; margin: 0 auto; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.hint {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 70ch;
  margin: 1rem 0;
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.panel-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.btn {
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  font-size: 0.9rem;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #0b1220; border-color: var(--accent); font-weight: 600; }
.btn-primary:hover:not(:disabled) { filter: brightness(1.08); }

#question-input {
  flex: 1;
  min-width: 200px;
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.9rem;
}

.progress-text { color: var(--text-muted); font-size: 0.85rem; }
.muted { color: var(--text-muted); }
.small { font-size: 0.82rem; }

/* --- pipeline diagram --- */
.pipeline {
  display: flex;
  align-items: stretch;
  gap: 0.4rem;
  overflow-x: auto;
  padding: 0.5rem 0 1.25rem;
  flex-wrap: wrap;
}

.pbox {
  flex: 1 1 120px;
  min-width: 110px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 0.6rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.pbox:hover { border-color: var(--accent); }
.pbox:focus { outline: none; border-color: var(--accent); }

.pbox-icon { font-size: 1.3rem; }
.pbox-label { font-size: 0.78rem; margin-top: 0.3rem; color: var(--text-muted); }
.pbox-detail { font-size: 0.72rem; margin-top: 0.25rem; color: var(--text-muted); min-height: 1em; }

.pbox.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  transform: translateY(-2px);
  animation: pulse 1.1s ease-in-out infinite;
}
.pbox.active .pbox-label { color: var(--text); }

.pbox.done {
  border-color: var(--ok);
}
.pbox.done .pbox-label { color: var(--text); }

.pbox.error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.15);
}
.pbox.error .pbox-label { color: var(--error); }

/* Persistent "this is the box whose output you're viewing" marker —
   independent of the active/done run-state coloring above. */
.pbox.selected { box-shadow: inset 0 0 0 2px var(--accent); }

.click-hint { margin: 0 0 0.4rem; }

/* Brief highlight used to draw the eye to a card a box click scrolled to. */
.flash { animation: flash-highlight 1.1s ease; }
@keyframes flash-highlight {
  0% { box-shadow: 0 0 0 2px var(--accent); }
  100% { box-shadow: 0 0 0 2px transparent; }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px var(--accent-soft); }
  50% { box-shadow: 0 0 0 6px var(--accent-soft); }
}

.parrow { align-self: center; color: var(--text-muted); font-size: 1rem; padding: 0 0.1rem; }

/* --- cards / grid --- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}
@media (max-width: 720px) { .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-top: 1rem;
}
.card h3 { margin: 0 0 0.5rem; font-size: 0.95rem; }

.doc-list, .batch-list { font-size: 0.85rem; }
.doc-row, .batch-row {
  display: flex;
  justify-content: space-between;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
}
.doc-row:last-child, .batch-row:last-child { border-bottom: none; }
.doc-row .badge, .batch-row .badge {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
}

/* --- embedding strip --- */
.embedding-strip {
  display: flex;
  gap: 2px;
  flex-wrap: wrap;
}
.embedding-cell {
  width: 14px;
  height: 28px;
  border-radius: 2px;
}

/* --- score bars --- */
.score-bars { display: flex; flex-direction: column; gap: 0.4rem; }
.score-row { display: flex; align-items: center; gap: 0.6rem; font-size: 0.8rem; }
.score-label {
  width: 220px;
  flex-shrink: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--mono);
  color: var(--text-muted);
}
.score-track {
  flex: 1;
  background: var(--bg);
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.score-fill {
  display: block;
  height: 100%;
  background: var(--border);
  border-radius: 999px;
  transition: width 0.4s ease;
}
.score-row.topk .score-label { color: var(--text); font-weight: 600; }
.score-row.topk .score-fill { background: var(--accent); }
.score-value { width: 50px; text-align: right; font-family: var(--mono); color: var(--text-muted); }

/* --- vector map --- */
.vector-map { display: flex; flex-direction: column; gap: 0.6rem; }
.vector-map-toolbar { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.btn-chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  font-size: 0.78rem;
  cursor: pointer;
}
.btn-chip:hover { border-color: var(--accent); color: var(--text); }
#vector-map {
  position: relative; /* anchors the hover/tap distance label */
  width: 100%;
  aspect-ratio: 560 / 340;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
#vector-map canvas { display: block; width: 100%; height: 100%; cursor: grab; touch-action: none; }
#vector-map canvas:active { cursor: grabbing; }
.vector-map-label {
  position: absolute;
  pointer-events: none; /* except the reroot button inside it, below */
  background: #0b1220;
  color: var(--text);
  border: 1px solid var(--accent);
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  font-size: 0.78rem;
  max-width: 220px;
  z-index: 5;
}
.vector-map-label .btn-chip { pointer-events: auto; margin-top: 0.4rem; }
.vector-map-legend { display: flex; gap: 1rem; flex-wrap: wrap; font-size: 0.78rem; color: var(--text-muted); }
.legend-swatch {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  margin-right: 0.35rem;
  vertical-align: middle;
}
.legend-query { background: var(--warn); }
.legend-topk { background: var(--accent); }
.legend-dot { background: var(--text-muted); opacity: 0.6; }

/* --- prompt / answer --- */
.code-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 320px;
  overflow-y: auto;
}

.answer-box {
  min-height: 3.5em;
  white-space: pre-wrap;
  font-size: 0.92rem;
}

.chips { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.6rem; }
.chip {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  font-size: 0.75rem;
  font-family: var(--mono);
}

/* --- log --- */
.log-details { margin-top: 1.5rem; }
.log-details summary { cursor: pointer; color: var(--text-muted); font-size: 0.85rem; }
.event-log {
  margin-top: 0.6rem;
  max-height: 260px;
  overflow-y: auto;
  font-family: var(--mono);
  font-size: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem 0.7rem;
}
.log-entry { padding: 0.15rem 0; border-bottom: 1px solid var(--border); }
.log-entry:last-child { border-bottom: none; }
.log-entry .log-name { color: var(--accent); }
.log-entry .log-ts { color: var(--text-muted); margin-right: 0.5rem; }
.log-entry details { margin-top: 0.1rem; }
.log-entry pre { margin: 0.2rem 0 0; white-space: pre-wrap; word-break: break-word; color: var(--text-muted); }
.log-entry.error { color: var(--error); }

/* --- tooltips (info icons) --- */
.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--border);
  color: var(--text-muted);
  font-size: 10px;
  font-style: normal;
  line-height: 1;
  cursor: help;
  position: relative;
  vertical-align: middle;
  margin-left: 0.15rem;
}
.info-icon:hover, .info-icon:focus { background: var(--accent); color: #0b1220; outline: none; }

/* Inline concept term (a whole word/phrase, not a standalone icon) — same
   popover as .info-icon, but styled as a dotted underline so wrapping a
   multi-character term never overflows a fixed-size circle. */
.term-tooltip {
  position: relative;
  cursor: help;
  border-bottom: 1px dotted var(--text-muted);
}
.term-tooltip:hover, .term-tooltip:focus { border-bottom-color: var(--accent); color: var(--accent); outline: none; }

.info-icon:hover::after, .info-icon:focus::after,
.info-icon:hover::before, .info-icon:focus::before,
.term-tooltip:hover::after, .term-tooltip:focus::after,
.term-tooltip:hover::before, .term-tooltip:focus::before {
  opacity: 1;
  visibility: visible;
}
.info-icon::after, .term-tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 135%;
  left: 50%;
  transform: translateX(-50%);
  background: #05070c;
  color: #e6e8ef;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  width: 260px;
  max-width: 60vw;
  font-size: 0.72rem;
  font-weight: 400;
  line-height: 1.45;
  text-align: left;
  white-space: normal;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border);
  z-index: 30;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease;
  pointer-events: none;
}
.info-icon::before, .term-tooltip::before {
  content: "";
  position: absolute;
  bottom: 118%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: #05070c;
  z-index: 30;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease;
}

/* --- Explore tab: document picker --- */
.doc-picker { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.doc-pick-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
  cursor: pointer;
  font-family: var(--mono);
}
.doc-pick-btn:hover { border-color: var(--accent); }
.doc-pick-btn.active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }

/* --- Explore tab: chunk cards --- */
.chunk-list { display: flex; flex-direction: column; gap: 0.75rem; }
.chunk-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem;
}
.chunk-card-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}
.chunk-badge {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.chunk-badge.overlap { color: var(--warn); border-color: var(--warn); }
.chunk-badge.vector-yes { color: var(--ok); border-color: var(--ok); }
.chunk-badge.vector-no { color: var(--text-muted); }
.chunk-text {
  font-size: 0.83rem;
  color: var(--text-muted);
  white-space: pre-wrap;
}
.chunk-vector-btn {
  margin-top: 0.6rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--accent);
  border-radius: var(--radius);
  padding: 0.3rem 0.7rem;
  font-size: 0.75rem;
  cursor: pointer;
}
.chunk-vector-btn:hover { border-color: var(--accent); }
.chunk-vector-panel {
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--border);
  font-size: 0.78rem;
}
.chunk-vector-meta { color: var(--text-muted); margin-bottom: 0.4rem; }

/* --- Explore tab: code viewer --- */
.code-picker { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.8rem; }
.chip-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-size: 0.78rem;
  cursor: pointer;
}
.chip-btn:hover { border-color: var(--accent); }
.chip-btn.active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.code-viewer .snippet-name {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin: 0.8rem 0 0.3rem;
}
.code-viewer .snippet-name:first-child { margin-top: 0; }

/* --- "is this an agent?" clarity note --- */
.agent-note {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--warn);
  border-radius: var(--radius);
  font-size: 0.85rem;
}
.agent-note summary { cursor: pointer; font-weight: 600; color: var(--text); }
.agent-note p { color: var(--text-muted); margin: 0.6rem 0 0; line-height: 1.5; }
.agent-note code {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
}

/* --- shared "box output" panel (Build the Index / Ask a Question tabs) --- */
.box-output-card { border-left: 2px solid var(--accent); }
.box-output-card h3 { margin-bottom: 0.6rem; }
.box-output-title { color: var(--accent); font-family: var(--mono); font-weight: 400; }
.box-output-content .muted { display: block; padding: 0.4rem 0; }

/* --- Explore tab: "what's stored" database summary --- */
.db-summary-line {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.7rem;
}
.db-summary-line strong { color: var(--text); }
.db-summary-line .db-path { font-family: var(--mono); font-size: 0.75rem; }
.db-table-wrap { max-height: 320px; overflow-y: auto; border: 1px solid var(--border); border-radius: var(--radius); }
.db-table { width: 100%; border-collapse: collapse; font-size: 0.78rem; }
.db-table th {
  position: sticky;
  top: 0;
  background: var(--bg-card);
  text-align: left;
  padding: 0.5rem 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}
.db-table td {
  padding: 0.4rem 0.7rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  color: var(--text-muted);
}
.db-table tr:last-child td { border-bottom: none; }
.db-table td.db-source { color: var(--text); }
.db-table td.eval-ok { color: var(--ok); }
.db-table td.eval-bad { color: var(--error); }

/* --- Metrics tab: evaluation score tiles --- */
.metric-tile {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}
.metric-value { font-size: 2.2rem; font-weight: 700; font-family: var(--mono); color: var(--accent); }
.metric-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.2rem; }
.metric-derived { font-size: 0.72rem; color: var(--text-muted); margin-top: 0.5rem; font-style: italic; }

.card h4 { font-size: 0.85rem; margin: 1rem 0 0.5rem; color: var(--text); }
.card h4:first-child { margin-top: 0; }

/* --- Metrics tab: latency --- */
.latency-bar {
  display: flex;
  height: 26px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 0.5rem;
}
.latency-segment {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-family: var(--mono);
  color: #0b1220;
  white-space: nowrap;
  overflow: hidden;
  min-width: 2px;
}
.latency-segment.embedding { background: #6ea8fe; }
.latency-segment.search { background: #4ade80; }
.latency-segment.llm { background: #fbbf24; }
.latency-legend { font-size: 0.78rem; color: var(--text-muted); }
.latency-legend strong { color: var(--text); }
.latency-distribution-line { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.7rem; }
.latency-distribution-line strong { color: var(--text); }

/* --- Metrics tab: concepts glossary --- */
.concept-list { display: flex; flex-direction: column; gap: 1rem; }
.concept { border-left: 2px solid var(--border); padding-left: 0.8rem; }
.concept h4 {
  margin: 0 0 0.3rem;
  font-size: 0.88rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.concept p { margin: 0; font-size: 0.83rem; color: var(--text-muted); line-height: 1.55; }
.concept code {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
}
.concept-not-used { border-left-color: var(--warn); }
.not-used-badge {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--warn);
  border: 1px solid var(--warn);
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
}
.not-covered-note { margin-top: 1.2rem; }
.not-covered-list { margin: 0.4rem 0 0; padding-left: 1.2rem; }
.not-covered-list li { margin-bottom: 0.5rem; line-height: 1.5; }
.not-covered-list strong { color: var(--text); }

/* --- landing screen --- */
.landing {
  padding: 0 1.5rem 3rem;
  max-width: 1100px;
  margin: 0 auto;
}

.landing-hero {
  padding: 2.5rem 0 2rem;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.landing-hero h1 {
  font-size: 1.8rem;
  margin: 0 0 1rem;
  line-height: 1.25;
}
.landing-sub {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0 0 1.5rem;
}
.landing-sub em { color: var(--text); font-style: normal; font-weight: 600; }

.btn-cta {
  padding: 0.75rem 1.6rem;
  font-size: 1rem;
}

.landing-section {
  margin-top: 2.5rem;
}
.landing-section h2 {
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}
.landing-section > p.muted {
  margin: 0 0 1rem;
}

.landing-pipeline-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 1.2rem 0 0.3rem;
  font-weight: 600;
}
/* Non-interactive preview: same box styling as the real pipeline diagrams,
   just without hover/active/click affordances — this is illustration, not
   a control. */
.landing-pipeline-preview .pbox {
  cursor: default;
}
.landing-pipeline-preview .pbox:hover {
  border-color: var(--border);
}

.landing-topics .card h3 {
  font-size: 0.92rem;
}

.landing-cta-footer {
  margin-top: 3rem;
  text-align: center;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

/* --- Ask tab: Classic vs Agentic mode toggle --- */
.mode-tabs {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0;
}
.mode-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
}
.mode-btn:hover { border-color: var(--accent); }
.mode-btn.active { color: var(--accent); background: var(--accent-soft); border-color: var(--accent); }

.ask-mode-panel { display: none; }
.ask-mode-panel.active { display: block; }

/* --- Ask tab: agentic trace --- */
.agentic-trace {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  margin: 1rem 0;
}
.trace-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
}
.trace-step-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}
.trace-step-badge {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 0.05rem 0.55rem;
}
.trace-query {
  margin: 0.3rem 0;
  font-size: 0.85rem;
}
.trace-query .trace-query-text {
  font-family: var(--mono);
  color: var(--text);
}
.trace-chunks {
  margin: 0.3rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.trace-chunks li { margin-bottom: 0.15rem; }
.trace-decision {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  font-style: italic;
  color: var(--text-muted);
}
.trace-decision.decided { color: var(--ok); font-style: normal; }

/* --- Ask tab: classic vs agentic comparison --- */
.ask-comparison { border-left: 2px solid var(--accent); }
.ask-comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-top: 0.5rem;
}
@media (max-width: 720px) { .ask-comparison-grid { grid-template-columns: 1fr; } }
.ask-comparison-col h4 {
  font-size: 0.82rem;
  color: var(--accent);
  margin: 0 0 0.5rem;
}
.ask-comparison-stat {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 0.2rem 0;
  border-bottom: 1px solid var(--border);
}
.ask-comparison-stat:last-child { border-bottom: none; }
.ask-comparison-stat strong { color: var(--text); font-family: var(--mono); font-weight: 600; }

/* ---------------------------------------------------------- hub (/) ----- */

.hub-main { padding-top: 2rem; }
.hub-intro { color: var(--text-muted); max-width: 65ch; line-height: 1.5; }

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.hub-card {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s;
}
.hub-card:hover { border-color: var(--accent); }
.hub-card h3 { color: var(--text); font-size: 1.05rem; }
.hub-card p { line-height: 1.45; }

.hub-card-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.75rem; }
.pill {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.hub-card-cta {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
}

.hub-more-note { margin-top: 1.5rem; }

.hub-footer { max-width: 1100px; margin: 2rem auto 3rem; padding: 0 1.5rem; }