/* Layout, typography, components. Theme variables live in theme.css. */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- Header (minimal, lmattos-style) ---------- */
header.paper {
  max-width: var(--reading-width);
  margin: 0 auto;
  padding: 56px 24px 0;
}
header.paper h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.85rem;
  line-height: 1.22;
  letter-spacing: -0.012em;
  margin: 0 0 10px;
}
header.paper .venue {
  font-style: italic;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 14px;
}
header.paper .authors {
  font-size: 0.98rem;
  margin-bottom: 4px;
}
header.paper .authors a {
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-rule);
  padding-bottom: 1px;
}
header.paper .authors a:hover { border-bottom-color: var(--color-accent); }
header.paper .affil {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 18px;
}
header.paper .links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.92rem;
  margin-bottom: 28px;
}
header.paper .links a {
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-rule);
  padding-bottom: 1px;
}
header.paper .links a:hover { border-bottom-color: var(--color-accent); }
header.paper .links a.disabled {
  color: var(--color-muted, #888);
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

header.paper .teaser {
  width: 100%;
  display: block;
  border-radius: 2px;
  margin-bottom: 4px;
}
header.paper .teaser-caption {
  font-size: 0.84rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 8px 2px 0;
  text-align: justify;
  hyphens: auto;
}

header.paper .abstract {
  margin-top: 20px;
}
header.paper .abstract p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--color-text-muted);
  text-align: justify;
  hyphens: auto;
}
header.paper .abstract-label {
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.email-quote {
  margin: 0 0 18px;
  padding-left: 14px;
  border-left: 2px solid var(--color-rule);
}
.email-quote p {
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--color-text-muted);
  text-align: justify;
  hyphens: auto;
}
.email-quote .quote-highlight {
  background: rgba(255, 220, 100, 0.35);
  color: var(--color-text);
  padding: 0 2px;
  border-radius: 2px;
}

header.paper .paper-section-heading {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 32px 0 10px;
}
header.paper .acknowledgments {
  font-size: 0.86rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin: 14px 0 32px;
  text-align: justify;
  hyphens: auto;
}

/* ---------- Article column ---------- */
article {
  max-width: var(--reading-width);
  margin: 0 auto;
  padding: 40px 24px 96px;
  border-top: 1px solid var(--color-rule);
}
article .byline {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin: 0 0 28px;
}
article .byline a {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-rule);
}

article h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: -0.005em;
  margin: 56px 0 14px;
}
article h2 .secnum {
  color: var(--color-text-muted);
  font-weight: 400;
  margin-right: 10px;
}

article p { margin: 0 0 16px; text-align: justify; hyphens: auto; }

/* Numbered display equations (LaTeX-style \label / \ref). */
.equation {
  position: relative;
  margin: 0 0 16px;
}
.equation .eq-num {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  font-family: inherit;
  font-size: 1rem;
}
.ref-missing { color: #c0392b; }
article p.lede { font-size: 1.06rem; }

article a { color: var(--color-accent); text-decoration: none; border-bottom: 1px solid rgba(42,95,184,0.3); }
article a:hover { border-bottom-color: var(--color-accent); }

blockquote { margin: 0 0 18px; padding: 0; border-left: none; font-style: normal; color: var(--color-text); }

/* Figures escape the reading column */
.figure { margin: 28px -120px; padding: 0; text-align: center; }
.figure .figure-body {
  display: inline-block;
  text-align: left;
  max-width: 100%;
}
.figure .figure-body:has(.canvas-wrap.wide) { display: block; }
.figure .canvas-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  padding: 16px;
  display: block;
  max-width: 100%;
}
.figure-caption {
  text-align: justify;
  hyphens: auto;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-top: 10px;
  padding: 0 4px;
  box-sizing: border-box;
  width: 0;
  min-width: 100%;
}
.figure-caption b { color: var(--color-text); font-weight: 600; }

/* Canvas + side controls. Canvas is intrinsically sized; controls
 * fill the remainder. We use flex so the canvas and controls sit
 * tight against each other instead of grid-stretching the column. */
.canvas-row {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  flex-wrap: wrap;
}
.canvas-row .canvas-col {
  flex: 0 0 auto;
}
.canvas-row .controls {
  flex: 1 1 220px;
  min-width: 200px;
  max-width: 280px;
}
.canvas-row.solo .controls { display: none; }

.controls { font-size: 0.88rem; }
.controls label {
  display: block;
  margin: 8px 0 4px;
  color: var(--color-text-muted);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.controls label:first-child { margin-top: 0; }
.controls input[type="range"] { width: 100%; }

/* Colormap slider — track is the heatmap gradient, thumb shows the
 * brush value. Cross-browser styling for WebKit and Firefox. */
input[type="range"].colormap-slider {
  -webkit-appearance: none;
  appearance: none;
  height: 22px;
  background: transparent;
  margin: 6px 0 4px;
  outline: none;
}
input[type="range"].colormap-slider::-webkit-slider-runnable-track {
  height: 16px;
  border-radius: 3px;
  border: 1px solid var(--color-rule);
  background: linear-gradient(to right, var(--hm-low) 0%, var(--hm-mid) 50%, var(--hm-high) 100%);
}
input[type="range"].colormap-slider::-moz-range-track {
  height: 16px;
  border-radius: 3px;
  border: 1px solid var(--color-rule);
  background: linear-gradient(to right, var(--hm-low) 0%, var(--hm-mid) 50%, var(--hm-high) 100%);
}
input[type="range"].colormap-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 22px;
  border-radius: 3px;
  background: #ffffff;
  border: 1.5px solid var(--color-text);
  box-shadow: 0 1px 2px rgba(0,0,0,0.18);
  cursor: pointer;
  margin-top: -4px;
}
input[type="range"].colormap-slider::-moz-range-thumb {
  width: 14px;
  height: 22px;
  border-radius: 3px;
  background: #ffffff;
  border: 1.5px solid var(--color-text);
  box-shadow: 0 1px 2px rgba(0,0,0,0.18);
  cursor: pointer;
}
/* Plain-track variant — used by the trade-off slider. The track shows
 * a pale gradient from the "grid-like" end (cool, neumann-tinted) to
 * the "pure operator" end (warm, interface-tinted). */
input[type="range"].colormap-slider.plain-slider::-webkit-slider-runnable-track {
  background: linear-gradient(to right, #e1e6d9 0%, #f5e3cf 100%);
}
input[type="range"].colormap-slider.plain-slider::-moz-range-track {
  background: linear-gradient(to right, #e1e6d9 0%, #f5e3cf 100%);
}
input[type="range"].colormap-slider.plain-slider {
  height: 26px;
}
.slider-ticks {
  display: flex;
  justify-content: space-between;
  /* Inset by half the thumb width so endpoint ticks sit under the
   * thumb's center at min/max, not under the track edge. */
  margin: -2px 7px 0;
  pointer-events: none;
}
.slider-ticks span {
  display: block;
  width: 1px;
  height: 5px;
  background: var(--color-text-muted, #888);
}
.controls .brush-val {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text);
  text-transform: none;
  letter-spacing: 0;
  margin-left: 6px;
}
/* Vertical orientation via 90° rotation: avoids browser inconsistencies
 * with writing-mode on <input type="range">. The wrapping element
 * reserves the post-rotation footprint. */
.colormap-slider-vwrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 80px;
}
.colormap-slider-vwrap input[type="range"].colormap-slider {
  transform: rotate(-90deg);
  transform-origin: center center;
  width: 80px;
  margin: 0;
}
.controls .slider-ends {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}
/* Pipeline stage slider — sits under the canvas, full width. */
.pipeline-stage-bar { width: 100%; max-width: 380px; margin: 10px 0 0; }
.pipeline-stage-bar label {
  display: block;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.pipeline-stage-bar input.stage-slider {
  width: 100%;
  /* Neutral track gradient — stage slider is not value-coded */
  background: transparent;
}
.pipeline-stage-bar input.stage-slider::-webkit-slider-runnable-track {
  background: var(--color-rule);
}
.pipeline-stage-bar input.stage-slider::-moz-range-track {
  background: var(--color-rule);
}
.pipeline-stage-bar .stage-tick-labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-muted);
  padding: 0 5px;
  margin-top: -2px;
}
.pipeline-stage-bar .stage-desc {
  font-size: 0.85rem;
  color: var(--color-text);
  margin: 8px 0 0;
  line-height: 1.45;
  min-height: 2.6em;
}

.controls .legend { display: flex; flex-direction: column; gap: 4px; margin-top: 12px; font-size: 0.82rem; }
.controls .legend span { display: flex; align-items: center; gap: 6px; }
.controls .legend i { display: inline-block; width: 14px; height: 4px; border-radius: 1px; }

.controls .solver-toggle {
  display: inline-flex;
  border: 1px solid var(--color-rule);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 4px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
}
.controls .solver-toggle label {
  margin: 0;
  padding: 4px 10px;
  cursor: pointer;
  background: var(--color-surface);
  color: var(--color-text-muted);
  border-left: 1px solid var(--color-rule);
  text-transform: none;
  letter-spacing: 0;
}
.controls .solver-toggle label:first-of-type { border-left: none; }
.controls .solver-toggle input { display: none; }
.controls .solver-toggle input:checked + span {
  color: var(--color-text);
  font-weight: 600;
}
.controls .solver-toggle label:has(input:checked) {
  background: #f4f4f4;
}

.controls .stat {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  margin: 6px 0;
  color: var(--color-text);
}

.controls button, .panel-btn {
  font-family: var(--font-body);
  font-size: 0.84rem;
  padding: 6px 10px;
  border: 1px solid var(--color-rule);
  background: var(--color-surface);
  border-radius: 3px;
  cursor: pointer;
  margin-top: 8px;
}
.controls button:hover { background: #f4f4f4; }

.controls .presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}
.controls .presets button {
  margin: 0;
  padding: 3px;
  line-height: 0;
  border-radius: 3px;
}
.controls .presets button canvas {
  display: block;
  border-radius: 2px;
}
.controls .presets button:hover { border-color: var(--color-text); }

/* Canvas baseline: NEVER stretch via CSS — the JS sets explicit
 * pixel width/height. Inline-block prevents block-level expansion. */
canvas {
  display: block;
  background: var(--color-surface);
  border-radius: 2px;
  cursor: crosshair;
  touch-action: none;
}
canvas.hist { cursor: default; }

/* Side-by-side panels (Interactive 4) */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.split .panel {
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  padding: 12px;
}
.split .panel h4 {
  margin: 0 0 8px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  font-weight: 600;
}
.split .panel canvas { margin-bottom: 8px; }

/* Pipeline diagram (Section 6) */
.pipeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 14px;
}
.pipeline .step {
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  padding: 12px;
  text-align: center;
  font-size: 0.82rem;
}
.pipeline .step canvas { width: 100%; height: 110px; display: block; margin-bottom: 8px; }
.pipeline .step b { display: block; font-size: 0.72rem; text-transform: uppercase; color: var(--color-text-muted); letter-spacing: 0.08em; margin-bottom: 4px; }

.pipeline-annot {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 18px;
  font-size: 0.86rem;
  color: var(--color-text-muted);
  margin-top: 18px;
  padding: 14px 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: 4px;
}
.pipeline-annot b { color: var(--color-text); }

.katex-display { margin: 14px 0 !important; }

pre.bibtex {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: #fafafa;
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  padding: 14px 16px;
  overflow-x: auto;
  position: relative;
}
.copy-btn {
  position: absolute; top: 8px; right: 8px;
  font-size: 0.74rem; padding: 4px 8px;
  background: var(--color-bg);
  border: 1px solid var(--color-rule);
  border-radius: 3px;
  cursor: pointer;
}

footer {
  border-top: 1px solid var(--color-rule);
  padding: 20px 24px;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  max-width: var(--reading-width);
  margin: 32px auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
footer .footer-logo {
  display: inline-flex;
  border: none;
  opacity: 0.7;
  transition: opacity 0.15s;
}
footer .footer-logo:hover { opacity: 1; }
footer .footer-logo img {
  height: 40px;
  width: auto;
  display: block;
}
footer a { color: inherit; border-bottom: 1px solid var(--color-rule); }

/* ---------- References (distill-style) ---------- */
.cite-link {
  position: relative;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: none;
  font-size: 0.78em;
  vertical-align: super;
  line-height: 1;
  padding: 0 1px;
  white-space: nowrap;
}
.cite-link:hover { text-decoration: underline; }
.cite-link + .cite-link { margin-left: 1px; }

.cite-card {
  position: fixed;
  width: min(360px, calc(100vw - 16px));
  white-space: normal;
  overflow-wrap: break-word;
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.10);
  padding: 10px 12px;
  font-size: 0.82rem;
  line-height: 1.4;
  vertical-align: baseline;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px;
  text-align: left;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s ease;
  z-index: 50;
}
/* Transparent bridge so the cursor can move onto the card without losing hover. */
.cite-card::before {
  content: '';
  position: absolute;
  inset: -10px;
  z-index: -1;
}
.cite-link:hover > .cite-card,
.cite-link:focus > .cite-card,
.fn-link:hover > .cite-card,
.fn-link:focus > .cite-card {
  opacity: 1;
  pointer-events: auto;
}
.cite-card-num {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: 0.78rem;
}
.cite-card-title { font-weight: 600; margin-bottom: 2px; }
.cite-card-title a { color: inherit; border-bottom: 1px solid var(--color-rule); text-decoration: none; }
.cite-card-meta { color: var(--color-text-muted); font-size: 0.78rem; }

.ref-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.55;
}
.ref-entry {
  display: grid;
  grid-template-columns: 2.4em 1fr;
  gap: 6px;
  padding: 6px 0;
  border-top: 1px solid var(--color-rule);
}
.ref-entry:last-child { border-bottom: 1px solid var(--color-rule); }
.ref-num {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: 0.82rem;
}
.ref-body a { color: var(--color-text); border-bottom: 1px solid var(--color-rule); text-decoration: none; }
.ref-body a:hover { border-bottom-color: var(--color-accent); }

/* Footnote markers — same hover card as citations, distinct color */
.fn-link {
  position: relative;
  color: var(--color-text-muted);
  text-decoration: none;
  border-bottom: none;
  font-size: 0.78em;
  vertical-align: super;
  line-height: 1;
  padding: 0 1px;
  font-family: var(--font-mono);
  white-space: nowrap;
  cursor: pointer;
}
.fn-link:hover { color: var(--color-accent); }
.fn-link .cite-card { font-family: var(--font-body); font-size: 0.84rem; }
.fn-card .cite-card-body { display: block; }

/* Animated absorbing Markov chain figure (auto, non-interactive). */
/* Inline-with-text figure: don't escape the reading column. */
#amc-anim.figure { margin-left: 0; margin-right: 0; }
#amc-anim .figure-body { display: block; }
#amc-anim .canvas-wrap { display: block; }

.amc-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 760 / 200;
  margin: 0 auto;
}
.amc-stage svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}
.amc-stage .amc-label {
  position: absolute;
  transform: translate(-50%, -50%);
  font-size: 0.78rem;
  pointer-events: none;
  color: var(--color-text);
}
.amc-legend {
  margin-top: 10px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.amc-legend .amc-swatch {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1.4px solid var(--color-text);
  background: var(--color-surface);
  vertical-align: -3px;
}
.amc-legend .amc-swatch--walker {
  width: 9px;
  height: 9px;
  border-width: 1.5px;
  vertical-align: 0;
}

/* Responsive */
@media (max-width: 1080px) {
  .figure { margin-left: 0; margin-right: 0; }
}
@media (max-width: 720px) {
  .canvas-row { flex-direction: column; }
  .canvas-row .controls { max-width: none; width: 100%; }
  #imc .controls { grid-template-columns: 1fr !important; }
  .split { grid-template-columns: 1fr; }
  .pipeline { grid-template-columns: 1fr 1fr; }
  header.paper h1 { font-size: 1.45rem; }
  article { padding: 16px 18px 64px; }
  header.paper { padding: 32px 18px 0; }
}