/* Engram demo — cool editorial paper + steel-blue accent (v4) */

:root {
  --bg: #f7f8f9;
  --bg-alt: #f2f4f5;
  --text: #1a1d20;
  --text-muted: #5d666e;
  --border: #d7dde1;
  --accent: #5b84a8;
  --accent-dark: #4a6b8a;
  --accent-soft: rgba(91, 132, 168, 0.12);
  --accent-glow: rgba(91, 132, 168, 0.35);
  --amber-ring: rgba(201, 146, 58, 0.45);
  --node-fill: #b9c2c9;
  --node-stroke: #9aa5ad;
  --shadow: 0 1px 3px rgba(26, 29, 32, 0.06);
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Segoe UI", system-ui, -apple-system, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* --- Header --- */

.site-header {
  padding: 2rem 2.5rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.site-header h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: 2.25rem;
  font-weight: 400;
  letter-spacing: -0.02em;
}

.site-header .subtitle {
  margin: 0.35rem 0 0;
  font-size: 0.95rem;
  color: var(--text-muted);
  font-style: italic;
}

.header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.token-badge {
  text-align: right;
  flex-shrink: 0;
}

.token-badge .label {
  font-variant: small-caps;
  letter-spacing: 0.12em;
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.token-badge .counts {
  font-family: var(--serif);
  font-size: 1.35rem;
}

.token-badge .counts .accent {
  color: var(--accent);
  font-weight: 600;
}

.token-badge .ratio-pill {
  display: inline-block;
  margin-top: 0.35rem;
  padding: 0.15rem 0.55rem;
  font-size: 0.72rem;
  font-variant: small-caps;
  letter-spacing: 0.08em;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 2px;
}

/* --- Main layout --- */

.main-grid {
  /* NOT flex:1 + min-height:0 — with more page content than 100vh, that combo
     lets flexbox shrink this grid's margin box down to whatever scrap of space
     is "left over" after the other body-level siblings (pros/cons, footer),
     while its actual content (graph pane, 420px min) paints outside that box
     and visually overlaps the next sections. Fixed min-height keeps the box
     honest; flex-grow:1 still lets it stretch taller on tall viewports. */
  flex-grow: 1;
  flex-shrink: 0;
  flex-basis: auto;
  display: grid;
  grid-template-columns: 1fr 340px;
  grid-template-rows: auto 1fr;
  gap: 0;
  min-height: 520px;
}

.controls-bar {
  grid-column: 1 / -1;
  padding: 1rem 2.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  align-items: center;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.control-group.grow {
  flex: 1;
  min-width: 280px;
}

.control-group label {
  font-variant: small-caps;
  letter-spacing: 0.1em;
  font-size: 0.68rem;
  color: var(--text-muted);
}

.query-row {
  display: flex;
  gap: 0.5rem;
}

.status-line {
  min-height: 1rem;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-variant: small-caps;
  letter-spacing: 0.05em;
}

.status-line.error {
  color: #a84a4a;
  font-variant: normal;
}

.query-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.4rem;
}

.chip {
  padding: 0.3rem 0.65rem;
  font-size: 0.72rem;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 999px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

#query-input {
  flex: 1;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 0.9rem;
  border-radius: 2px;
}

#query-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

button.primary {
  padding: 0.55rem 1.1rem;
  background: var(--accent);
  color: #fff;
  border: none;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-variant: small-caps;
  letter-spacing: 0.06em;
  cursor: pointer;
  border-radius: 2px;
  transition: opacity 0.15s;
}

button.primary:hover {
  opacity: 0.88;
}

button.primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Tick slider */

.tick-control {
  min-width: 220px;
}

.tick-control output {
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--accent);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  margin-top: 0.25rem;
}

.tick-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  max-width: 260px;
}

/* --- Graph pane --- */

.graph-pane {
  position: relative;
  min-height: 420px;
  border-right: 1px solid var(--border);
  background: var(--bg);
}

#cy {
  width: 100%;
  height: 100%;
  min-height: 420px;
}

.graph-legend {
  position: absolute;
  bottom: 1rem;
  left: 1.25rem;
  max-width: 320px;
  padding: 0.6rem 0.85rem;
  background: rgba(247, 248, 249, 0.92);
  border: 1px solid var(--border);
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.45;
  box-shadow: var(--shadow);
}

/* --- Side panel --- */

.side-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-height: calc(100vh - 12rem);
  background: var(--bg-alt);
  overflow: hidden;
}

.panel-section {
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#ku-section {
  flex: 0 1 auto;
  min-height: 0;
  max-height: min(42vh, 320px);
  overflow-y: auto;
}

.panel-section h2 {
  margin: 0 0 0.65rem;
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 400;
}

.panel-section .section-label {
  font-variant: small-caps;
  letter-spacing: 0.1em;
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.provenance-list {
  flex: 1;
  overflow-y: auto;
  padding: 0 1.25rem 1rem;
  min-height: 0;
}

.prov-item {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}

.prov-item:last-child {
  border-bottom: none;
}

.prov-item .prov-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.prov-item .prov-score {
  color: var(--accent);
  font-variant: small-caps;
  letter-spacing: 0.05em;
  font-size: 0.65rem;
}

.prov-item.answer-hit {
  padding-left: 0.5rem;
  border-left: 2px solid var(--amber-ring);
  background: rgba(201, 146, 58, 0.06);
}

.prov-empty {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-style: italic;
  padding: 1rem 0;
}

/* Knowledge update callout */

.ku-callout {
  font-size: 0.82rem;
}

.ku-block {
  margin-bottom: 0.75rem;
  padding: 0.6rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
}

.ku-block.stale {
  opacity: 0.72;
}

.ku-block.fresh {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-soft);
}

.ku-block .ku-tag {
  font-variant: small-caps;
  letter-spacing: 0.08em;
  font-size: 0.62rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.ku-block.fresh .ku-tag {
  color: var(--accent);
}

/* --- Pros / cons strip --- */

.pros-cons-strip {
  border-top: 1px solid var(--border);
  padding: 1.5rem 2.5rem 1.75rem;
  background: var(--bg-alt);
}

.pros-cons-strip h2 {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 400;
}

.pros-cons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem 2.5rem;
}

.pc-col ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text);
}

.pc-col li {
  margin-bottom: 0.6rem;
}

.pc-col li strong {
  color: var(--accent-dark);
}

.pc-col code {
  font-size: 0.78rem;
  background: rgba(0, 0, 0, 0.05);
  padding: 0.1rem 0.3rem;
  border-radius: 2px;
}

.pc-label {
  font-variant: small-caps;
  letter-spacing: 0.1em;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.pc-pro .pc-label {
  color: var(--accent);
}

.pc-con .pc-label {
  color: #a8794a;
}

@media (max-width: 760px) {
  .pros-cons-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Bottom strip --- */

.bottom-strip {
  border-top: 1px solid var(--border);
  padding: 1.25rem 2.5rem 1.75rem;
  background: var(--bg);
}

.bottom-strip h2 {
  margin: 0 0 0.75rem;
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 400;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin-bottom: 0.85rem;
}

.results-table th,
.results-table td {
  text-align: left;
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.results-table th {
  font-variant: small-caps;
  letter-spacing: 0.08em;
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 400;
}

.results-table td.num {
  font-variant-numeric: tabular-nums;
}

.positioning-lead {
  font-size: 0.8rem;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.5;
  margin: 0 0 0.85rem;
  font-style: italic;
}

.positioning {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.55;
}

.positioning cite {
  font-style: normal;
  font-size: 0.75rem;
  color: var(--text-muted);
}

@media (max-width: 960px) {
  .main-grid {
    grid-template-columns: 1fr;
  }

  .graph-pane {
    border-right: none;
    min-height: 360px;
  }

  .side-panel {
    max-height: 420px;
  }

  .header-row {
    flex-direction: column;
  }

  .token-badge {
    text-align: left;
  }
}