:root {
  --bg: #0b0e13;
  --bg-elev: #131821;
  --bg-elev-2: #1a212d;
  --border: #232c3b;
  --border-strong: #2f3b50;
  --text: #d8e0ee;
  --text-dim: #8b97ad;
  --text-muted: #5d6b82;
  --accent: #2dd4bf;
  --accent-2: #fb7185;
  --warn: #fbbf24;
  --good: #4ade80;
  --bid: #2dd4bf;
  --ask: #fb7185;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Monaco, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  transition: border-color 120ms;
}
a:hover { border-bottom-color: var(--accent); }

code, .num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 32px 120px;
}

.hero {
  margin-bottom: 64px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 40px;
}
.hero .eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.hero h1 {
  font-size: 44px;
  line-height: 1.1;
  margin: 0 0 18px;
  letter-spacing: -0.02em;
  font-weight: 600;
}
.hero p {
  color: var(--text-dim);
  font-size: 18px;
  max-width: 760px;
  margin: 0 0 14px;
}
.hero p em {
  color: var(--text);
  font-style: normal;
  font-weight: 500;
}
.hero .meta {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 18px;
}
.hero .meta a { color: var(--text-dim); }

.toc {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px 24px;
  margin-top: 32px;
  font-family: var(--mono);
  font-size: 13px;
}
.toc a {
  color: var(--text-dim);
  padding: 4px 0;
  border-bottom: none;
}
.toc a:hover { color: var(--accent); }
.toc .num-tag {
  display: inline-block;
  width: 28px;
  color: var(--text-muted);
}

section.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  margin-bottom: 32px;
  scroll-margin-top: 24px;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 8px;
}
.section-head .idx {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-muted);
}
.section-head h2 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.01em;
  font-weight: 600;
}

.card .lede {
  color: var(--text-dim);
  max-width: 720px;
  margin: 6px 0 22px;
}

.card .insight {
  margin-top: 14px;
  padding: 12px 14px;
  background: var(--bg-elev-2);
  border-left: 2px solid var(--accent);
  border-radius: 4px;
  font-size: 14px;
  color: var(--text-dim);
}
.card .insight strong { color: var(--text); }

.eq {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 14px 0;
  overflow-x: auto;
}

.widget {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  margin-top: 18px;
}
.widget .controls {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 16px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 0;
}
.widget .viz {
  min-width: 0;
  min-height: 320px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  position: relative;
}
.widget .viz.tight { padding: 0; }
.widget .viz canvas { display: block; }
.widget .viz .plot { width: 100%; height: 100%; }

@media (max-width: 880px) {
  .widget { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .page { padding: 32px 18px 80px; }
  section.card { padding: 20px; }
}

.slider {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.slider .row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 12px;
}
.slider .label { color: var(--text-dim); }
.slider .val { color: var(--accent); }
.slider input[type=range] {
  width: 100%;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--border-strong);
  outline: none;
}
.slider input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  cursor: grab;
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--accent);
}
.slider input[type=range]::-webkit-slider-thumb:active { cursor: grabbing; }
.slider input[type=range]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  cursor: grab;
  border: 2px solid var(--bg);
}

.btn {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 8px 14px;
  cursor: pointer;
  transition: all 120ms;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn.primary:hover { background: transparent; color: var(--accent); }

.readout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.readout .k { color: var(--text-muted); }
.readout .v { color: var(--text); text-align: right; }
.readout .v.bid { color: var(--bid); }
.readout .v.ask { color: var(--ask); }
.readout .v.warn { color: var(--warn); }
.readout .v.good { color: var(--good); }

.spinner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(11, 14, 19, 0.65);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms;
}
.spinner.on { opacity: 1; }
.spinner::before {
  content: "";
  width: 10px; height: 10px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

footer {
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  font-family: var(--mono);
}

/* Plotly dark adjustments */
.js-plotly-plot .plotly .modebar { display: none !important; }