@import url("https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;1,6..72,400&family=Assistant:wght@400;500;600;700&display=swap");

:root {
  --bg: #f9f6ef;
  --paper: #fffdf8;
  --ink: #161513;
  --muted: #6d6860;
  --line: #d8d0c4;
  --line-soft: #e9e3d9;
  --code-bg: #f0ebe2;
  --accent: #176b64;
  --accent-soft: #dcebe5;
  --accent-mid: #73a69f;
  --coral: #a33e2d;
  --coral-soft: #f3ddd5;
  --orange: #e99152;
  --orange-soft: #f9e5d4;
  --blue: #3f7e93;
  --blue-soft: #dbe9ec;
  /* Low-strength rendered cell colors sampled from Interactive Figure 01. */
  --matrix-softmax: #e0c1b6;
  --matrix-linear: #cad8d8;
  --matrix-both: #8d79a5;
  --matrix-anchor: #c5a35c;
  --matrix-text: #6f9b78;
  --matrix-text-soft: #dfe9e1;
  --matrix-audio: #8d79a5;
  --matrix-audio-soft: #e7e1ec;
  --shadow: 0 22px 60px rgba(32, 28, 20, 0.08);
  --serif: "Newsreader", "Noto Serif SC", "Songti SC", Georgia, serif;
  --sans: "Assistant", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html {
  font-size: 120%;
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
  overflow-x: clip;
}

body.article-page {
  min-height: 100vh;
  margin: 0;
  overflow-x: clip;
  background:
    linear-gradient(180deg, rgba(255, 253, 248, 0.82), rgba(251, 248, 242, 0.98)),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

button,
input { font: inherit; }

button { color: inherit; }

a { color: var(--accent); }

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-170%);
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  padding: 8px 12px;
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: relative;
  z-index: 60;
  width: 100%;
  padding: 15px max(20px, calc((100vw - 1360px) / 2));
  background: color-mix(in srgb, var(--bg) 94%, transparent);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(14px);
}

.site-brand,
.site-footer a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
}

.brand-logo {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
}

.brand-logo rect { fill: var(--paper); }
.brand-logo path {
  fill: none;
  stroke: currentColor;
  stroke-width: 5;
}

.brand-wordmark {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.site-brand-logo {
  display: flex;
  width: 64px;
  height: 30px;
  align-items: center;
  flex: 0 0 auto;
}

.site-brand-logo img {
  display: block;
  width: 100%;
  height: auto;
}

.site-nav {
  display: flex;
  gap: 34px;
}

.site-nav a {
  color: var(--muted);
  font-size: .73rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-nav a:hover,
.article-content a:hover { color: var(--coral); }

.article-shell {
  width: min(1360px, calc(100% - 40px));
  margin: 0 auto 80px;
}

.article-hero {
  padding: 78px 0 52px;
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.article-project-logo {
  position: relative;
  width: clamp(180px, 17vw, 236px);
  height: clamp(80px, 7.5vw, 104px);
  margin: 0 auto 18px;
  overflow: hidden;
}

.article-project-logo img {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: auto;
  mix-blend-mode: darken;
  transform: translateY(-50%);
}

.article-kicker {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.article-hero h1 {
  max-width: 980px;
  margin: 0 auto;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(2.5rem, 4.9vw, 4.55rem);
  font-weight: 400;
  letter-spacing: -.045em;
  line-height: .98;
}

.title-accent { color: var(--accent); }

.article-resource-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 20px auto 0;
}

.article-resource-link {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--paper) 92%, white);
  box-shadow: 0 3px 12px rgba(32, 28, 20, .05);
  color: var(--ink);
  font-size: .82rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  transition: border-color .16s ease, box-shadow .16s ease, color .16s ease, transform .16s ease;
}

.article-resource-link:hover,
.article-resource-link:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 58%, var(--line));
  box-shadow: 0 7px 20px rgba(32, 28, 20, .1);
  color: var(--accent);
  transform: translateY(-1px);
}

.article-resource-link:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 58%, transparent);
  outline-offset: 3px;
}

.article-resource-icon {
  display: block;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
}

.huggingface-icon {
  font-size: 17px;
  line-height: 18px;
}

.article-subtitle {
  max-width: 790px;
  margin: 20px auto 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.14rem, 2.2vw, 1.55rem);
  font-weight: 400;
  line-height: 1.35;
}

.article-subtitle span { display: block; }

.article-authors {
  max-width: 900px;
  margin: 14px auto 0;
  color: var(--muted);
  font-size: clamp(.72rem, 1vw, .86rem);
  line-height: 1.7;
}

.article-authors sup {
  margin-left: .12em;
  color: var(--accent);
  font-size: .7em;
  font-weight: 600;
  line-height: 0;
}

.article-affiliations {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .2rem 1.1rem;
  max-width: 760px;
  margin: 4px auto 0;
  color: var(--muted);
  font-size: clamp(.68rem, .9vw, .8rem);
  line-height: 1.55;
}

.article-affiliations span {
  white-space: nowrap;
}

.article-affiliations sup {
  margin-right: .2em;
  color: var(--accent);
  font-size: .72em;
  font-weight: 600;
}

.article-contribution-note {
  max-width: 760px;
  margin: 3px auto 0;
  color: var(--muted);
  font-size: clamp(.64rem, .82vw, .74rem);
  line-height: 1.45;
}

.article-contribution-note sup {
  margin-right: .18em;
  color: var(--accent);
  font-size: .78em;
  font-weight: 600;
}

.article-authors a {
  color: inherit;
  text-decoration-color: color-mix(in srgb, currentColor 38%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: .2em;
  transition: color .18s ease, text-decoration-color .18s ease;
}

.article-authors a:hover,
.article-authors a:focus-visible {
  color: var(--accent);
  text-decoration-color: currentColor;
}

.article-content {
  max-width: 860px;
  margin: 62px auto 0;
  font-size: 1.02rem;
}

.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.08;
}

.article-content h2 {
  margin: 88px 0 22px;
  padding-top: 6px;
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  letter-spacing: -.025em;
}

.article-content h3 {
  margin: 48px 0 16px;
  font-size: clamp(1.38rem, 2.4vw, 1.82rem);
}

.article-content h4 {
  margin: 38px 0 14px;
  font-size: clamp(1.12rem, 1.7vw, 1.35rem);
  letter-spacing: -.01em;
}

.article-content p,
.article-content ul,
.article-content ol { margin: 0 0 21px; }

.article-content li + li { margin-top: 9px; }

.article-content a {
  color: var(--accent);
  font-weight: 600;
  text-decoration-color: rgba(23, 107, 100, .35);
  text-underline-offset: 3px;
}

.standfirst {
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.3vw, 1.7rem);
  line-height: 1.4;
}

.standfirst::first-letter {
  float: left;
  margin: .11em .1em 0 0;
  color: var(--accent);
  font-family: var(--serif);
  font-size: 4.4rem;
  line-height: .67;
}

.article-content code {
  font-family: var(--mono);
}

.article-content :not(pre) > code {
  padding: .16em .34em;
  border-radius: 5px;
  background: rgba(23, 107, 100, .08);
  color: #174f4b;
  font-size: .92em;
}

.toc-desktop {
  position: sticky;
  top: 24px;
  z-index: 35;
  align-self: start;
  width: 100%;
  max-height: calc(100vh - 48px);
  padding: 17px 28px 15px 0;
  overflow-y: auto;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.toc-title {
  display: block;
  margin: 0 0 11px;
  color: var(--accent);
  font-size: .952rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.toc-desktop ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: toc-item;
}

.toc-desktop li {
  margin: 0;
  counter-increment: toc-item;
}

.toc-desktop a {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 6px 0;
  color: var(--muted);
  font-size: 1.064rem;
  font-weight: 600;
  line-height: 1.34;
  text-decoration: none;
}

.toc-desktop a::before {
  content: counter(toc-item, decimal-leading-zero);
  color: var(--line);
  font-family: var(--mono);
  font-size: .812rem;
  letter-spacing: .02em;
}

.toc-desktop a:hover,
.toc-desktop a:focus-visible { color: var(--accent); }

.toc-desktop a:hover::before,
.toc-desktop a:focus-visible::before { color: var(--accent-mid); }

.toc-desktop .toc-sublist {
  margin: 2px 0 6px 34px;
}

.toc-desktop .toc-sublist a {
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 6px;
  padding: 5px 0;
  color: var(--muted);
  font-size: .8rem;
  line-height: 1.35;
}

.toc-desktop .toc-sublist a::before {
  content: "↳";
  font-size: .62rem;
}

.toc-mobile {
  display: none;
  max-width: 860px;
  margin: 30px auto 0;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.toc-mobile summary {
  cursor: pointer;
  color: var(--muted);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.toc-mobile ol {
  margin: 12px 0 4px;
  padding-left: 24px;
}

.toc-mobile li { margin: 7px 0; }
.toc-mobile a { color: var(--ink); font-size: 1.08rem; line-height: 1.45; text-decoration: none; }
.toc-mobile a:hover { color: var(--accent); }

.toc-mobile .toc-sublist {
  margin: 5px 0 7px;
  padding-left: 20px;
}

.toc-mobile .toc-sublist li { margin: 4px 0; }
.toc-mobile .toc-sublist a { color: var(--muted); font-size: .96rem; }

/* Shared visualization language */
.viz-card {
  width: 100%;
  margin: 42px 0 40px;
  transform: none;
  border-top: 1px solid var(--line);
  padding-top: 13px;
}

.viz-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 18px;
  margin-bottom: 14px;
}

.viz-head > div { display: flex; flex-wrap: wrap; align-items: baseline; gap: 5px 12px; }

.viz-head.is-status-only { justify-content: flex-end; }

.viz-kicker {
  color: var(--accent);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1;
  text-transform: uppercase;
}

.article-content .viz-title {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.15;
}

.viz-hint {
  margin-left: auto;
  color: var(--muted);
  font-size: .72rem;
  opacity: .85;
  white-space: nowrap;
}

.viz-card figcaption {
  max-width: 850px;
  margin: 13px auto 0;
  color: var(--muted);
  font-size: .77rem;
  line-height: 1.55;
}

.viz-card figcaption strong { color: var(--ink); }

.viz-tooltip {
  position: absolute;
  z-index: 10;
  width: max-content;
  max-width: 260px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  box-shadow: 0 6px 24px rgba(32, 28, 20, .14);
  color: var(--ink);
  font-size: .72rem;
  line-height: 1.5;
  opacity: 0;
  pointer-events: none;
  transform: translate(8px, 8px);
  transition: opacity .12s ease;
}

.viz-tooltip.on { opacity: 1; }

/* Featured VDN-H3 result strip */
.vdn-result-showcase {
  position: relative;
  min-width: 0;
  margin: 0;
  overflow: clip;
}

.vdn-result-strip-controls {
  display: flex;
  width: max-content;
  margin: 0 0 10px auto;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
}

.vdn-result-strip-controls output {
  min-width: 62px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .58rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: .04em;
  text-align: center;
}

.vdn-result-strip-controls button {
  display: grid;
  width: 34px;
  height: 34px;
  padding: 0;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--paper);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color .18s ease, background .18s ease, color .18s ease, opacity .18s ease;
}

.vdn-result-strip-controls button:hover,
.vdn-result-strip-controls button:focus-visible {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.vdn-result-strip {
  position: relative;
  display: block;
  width: 100%;
  max-width: 100%;
  height: var(--vdn-carousel-height, 420px);
  overflow: visible;
  transition: height .35s ease;
}

.vdn-result-card {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 0;
  width: clamp(560px, 72%, 760px);
  min-width: 0;
  border: 1px solid var(--line);
  background: transparent;
  transform: translateX(calc(-50% + var(--vdn-carousel-shift, 0%))) scale(var(--vdn-carousel-scale, .92));
  transform-origin: center center;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    transform .46s cubic-bezier(.22, .76, .25, 1),
    opacity .32s ease,
    visibility 0s linear .46s;
  will-change: transform, opacity;
}

.vdn-result-card[data-carousel-position="current"] {
  z-index: 2;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition-delay: 0s;
}

.vdn-result-card[data-carousel-position="previous"],
.vdn-result-card[data-carousel-position="next"] {
  z-index: 1;
  opacity: .48;
  visibility: visible;
  filter: saturate(.72);
  transition-delay: 0s;
}

.vdn-result-card[data-carousel-position="previous"] { --vdn-carousel-shift: -95%; }
.vdn-result-card[data-carousel-position="next"] { --vdn-carousel-shift: 95%; }

.vdn-result-card[data-carousel-position="previous"]::after,
.vdn-result-card[data-carousel-position="next"]::after {
  content: "";
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg) 22%, transparent);
}

.vdn-result-video {
  display: block;
  width: 100%;
  aspect-ratio: 7 / 4;
  border: 0;
  background: #0f1211;
  object-fit: cover;
}

.vdn-result-prompt-disclosure {
  border-top: 1px solid var(--line-soft);
  background: var(--paper);
}

.vdn-result-prompt-toggle {
  display: flex;
  width: 100%;
  padding: 9px 12px;
  align-items: center;
  justify-content: space-between;
  border: 0;
  background: transparent;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .57rem;
  font-weight: 800;
  letter-spacing: .07em;
  text-transform: uppercase;
  cursor: pointer;
}

.vdn-result-prompt-toggle::after {
  content: "+";
  font-size: .82rem;
  line-height: 1;
}

.vdn-result-prompt-toggle[aria-expanded="true"]::after { content: "−"; }

.vdn-result-prompt-toggle:hover,
.vdn-result-prompt-toggle:focus-visible {
  background: var(--accent-soft);
}

.vdn-result-prompt-text {
  max-height: 84px;
  margin: 0;
  padding: 0 12px 11px;
  overflow: auto;
  color: var(--muted);
  font-family: var(--sans);
  font-size: .66rem;
  line-height: 1.45;
}

.vdn-result-prompt-text[hidden] { display: none; }

#introduction > .vdn-result-showcase + h2 { margin-top: 68px; }

/* Qualitative video comparisons */
.qualitative-results {
  margin: 38px 0 18px;
}

.qualitative-results.is-featured {
  width: 100vw;
  max-width: none;
  margin-top: 34px;
  margin-left: calc(50% - 50vw);
  padding: 18px 0 46px;
  overflow: clip;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--bg) 78%, transparent), transparent 17%, transparent 83%, color-mix(in srgb, var(--bg) 78%, transparent)),
    color-mix(in srgb, var(--paper) 38%, transparent);
}

.is-featured .qualitative-results-head {
  width: 90vw;
  margin: 0 auto 18px;
}

.qualitative-results-heading { min-width: 0; }

.qualitative-results-heading > span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1.35;
  text-transform: uppercase;
}

.qualitative-results-heading p {
  margin: 5px 0 0 !important;
  text-align: left;
}

.qualitative-results-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 14px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--line);
}

.qualitative-results-head > span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1.35;
  text-transform: uppercase;
}

.qualitative-results-head p {
  max-width: 520px;
  margin: 0 !important;
  color: var(--muted);
  font-size: .67rem;
  line-height: 1.45;
  text-align: right;
}

.comparison-gallery {
  display: grid;
  gap: 22px;
}

.is-featured .comparison-gallery {
  width: 90vw;
  margin: 0 auto;
}

.comparison-sample {
  min-width: 0;
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 92%, var(--bg));
  box-shadow: 0 12px 34px rgba(32, 28, 20, .045);
}

.comparison-sample-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
  padding: 1px 2px 11px;
}

.comparison-sample-heading {
  min-width: 0;
  flex: 1 1 420px;
}

.comparison-sample-head strong {
  color: var(--ink);
  font-family: var(--serif);
  font-size: .92rem;
  font-weight: 500;
  line-height: 1.2;
}

.comparison-sample-note {
  max-width: 760px;
  margin: 5px 0 0 !important;
  color: var(--muted);
  font-size: .67rem;
  line-height: 1.45;
}

.comparison-sample-actions {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  justify-content: flex-end;
}

.comparison-sample-actions button {
  min-width: 64px;
  padding: 6px 9px 5px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--muted);
  font-family: var(--mono);
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.1;
  text-transform: uppercase;
  cursor: pointer;
}

.comparison-sample-actions button:hover,
.comparison-sample-actions button:focus-visible {
  border-color: var(--accent-mid);
  color: var(--accent);
}

.comparison-sample-actions button[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.comparison-sample-actions .comparison-enlarge-button {
  display: inline-grid;
  width: 30px;
  min-width: 30px;
  height: 27px;
  place-items: center;
  padding: 4px;
}

.is-featured .comparison-sample-actions .comparison-enlarge-button.is-labeled {
  display: inline-flex;
  width: auto;
  min-width: 78px;
  height: 27px;
  align-items: center;
  justify-content: center;
  padding: 5px 10px 4px;
}

.comparison-enlarge-button.is-labeled span { line-height: 1; }

.comparison-enlarge-button svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.comparison-inline-transport {
  display: grid;
  grid-template-columns: auto minmax(160px, 1fr) auto;
  align-items: center;
  gap: 12px;
  margin: 0 2px 11px;
  padding: 9px 10px;
  border: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--paper) 72%, var(--bg));
}

.comparison-inline-time {
  min-width: 78px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .61rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: .025em;
  white-space: nowrap;
}

.comparison-inline-seek {
  width: 100%;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.result-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}
.result-comparison.is-all { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.result-video-card {
  min-width: 0;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
}
.result-video-card.is-ours { border-color: color-mix(in srgb, var(--accent) 42%, var(--line)); }
.result-video-head { padding: 1px 2px 9px; }
.result-video-head strong {
  color: var(--ink);
  font-size: .72rem;
  line-height: 1;
}
.result-video-card.is-ours .result-video-head strong { color: var(--accent); }
.result-video {
  display: block;
  width: 100%;
  aspect-ratio: 7 / 4;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: #111;
  object-fit: cover;
}

.has-comparison-lightbox { overflow: hidden; }

.comparison-lightbox {
  width: 100vw;
  height: 100dvh;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 34px 100px rgba(18, 17, 14, .32);
}

.comparison-lightbox::backdrop {
  background: rgba(18, 17, 14, .78);
  backdrop-filter: blur(7px);
}

.comparison-lightbox-shell {
  display: flex;
  width: 100%;
  height: 100%;
  max-height: none;
  box-sizing: border-box;
  flex-direction: column;
  padding: 3px clamp(8px, .7vw, 12px);
}

.comparison-lightbox-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 0 2px clamp(12px, 1.5vw, 20px);
}

.comparison-lightbox-toolbar {
  display: grid;
  flex: 0 0 auto;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  column-gap: clamp(7px, .7vw, 11px);
  row-gap: 3px;
  padding: 0 1px 3px;
}

.comparison-lightbox-head > div { min-width: 0; }

.comparison-lightbox-controls {
  display: flex;
  flex-wrap: wrap;
  flex: 0 0 auto;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.comparison-lightbox-head strong {
  display: block;
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 500;
  line-height: 1.1;
}

.comparison-lightbox-note {
  display: none;
  margin: 6px 0 0 !important;
  color: var(--muted);
  font-size: .75rem;
  line-height: 1.45;
}

.comparison-lightbox-prompt {
  flex: 0 0 auto;
  max-height: 116px;
  margin: 0 2px clamp(12px, 1.1vw, 16px);
  padding: 10px 12px;
  overflow-y: auto;
  overscroll-behavior: contain;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 82%, var(--bg));
  scrollbar-gutter: stable;
}

.comparison-lightbox-prompt:focus-visible {
  border-color: var(--accent-mid);
  outline: 2px solid var(--accent-soft);
  outline-offset: 2px;
}

.comparison-lightbox-prompt-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}

.comparison-lightbox-prompt-head span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: .58rem;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.comparison-lightbox-prompt-head small {
  color: var(--muted);
  font-family: var(--mono);
  font-size: .52rem;
  letter-spacing: .025em;
}

.comparison-lightbox-prompt-text {
  margin: 6px 0 0 !important;
  color: var(--ink);
  font-family: var(--sans);
  font-size: .68rem;
  line-height: 1.52;
  white-space: pre-wrap;
}

.comparison-lightbox-transport {
  display: grid;
  flex: 0 0 auto;
  grid-template-columns: auto minmax(180px, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 0 2px clamp(12px, 1.25vw, 18px);
}

.comparison-lightbox-toolbar .comparison-lightbox-transport {
  min-width: 0;
  padding: 0;
}

.comparison-lightbox-time {
  min-width: 78px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .61rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: .025em;
  white-space: nowrap;
}

.comparison-lightbox-seek {
  width: 100%;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.comparison-speed-control {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .54rem;
  font-weight: 700;
  letter-spacing: .045em;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}

.comparison-speed-options {
  display: inline-flex;
  height: 23px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
}

.comparison-speed-options button {
  min-width: 0;
  height: 21px;
  padding: 3px 8px 2px;
  border: 0;
  border-left: 1px solid var(--line-soft);
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .55rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
}

.comparison-speed-options button:first-child { border-left: 0; }

.comparison-speed-options button:hover,
.comparison-speed-options button:focus-visible {
  background: color-mix(in srgb, var(--accent-soft) 55%, var(--paper));
  color: var(--accent);
  outline: none;
}

.comparison-speed-options button[aria-pressed="true"] {
  background: var(--accent);
  color: var(--paper);
}

.comparison-lightbox-action,
.comparison-lightbox-close {
  flex: 0 0 auto;
  padding: 4px 11px 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--muted);
  font-family: var(--mono);
  font-size: .61rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  cursor: pointer;
}

.comparison-lightbox-action:hover,
.comparison-lightbox-action:focus-visible,
.comparison-lightbox-close:hover,
.comparison-lightbox-close:focus-visible {
  border-color: var(--accent-mid);
  color: var(--accent);
}

.comparison-lightbox-action[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.comparison-lightbox-grid {
  display: grid;
  flex: 1 1 auto;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  column-gap: clamp(5px, .55vw, 8px);
  row-gap: 2px;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
}
.comparison-lightbox-grid.is-all { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.comparison-lightbox-grid .comparison-lightbox-prompt {
  min-width: 0;
  height: 100%;
  max-height: none;
  box-sizing: border-box;
  margin: 0;
}
.comparison-lightbox-grid:not(.is-all) .comparison-lightbox-prompt { grid-column: 1 / -1; }

.comparison-lightbox-grid .result-video-card {
  padding: 2px 4px;
  border-width: .5px;
}

.comparison-lightbox-grid .result-video-head {
  padding: 0 2px 2px;
  font-size: .62rem;
  line-height: 1;
}
.comparison-lightbox-grid .result-video-head strong {
  font-size: inherit;
  line-height: inherit;
}
.comparison-lightbox-grid .result-video { border: 0; }
.comparison-lightbox-grid .comparison-lightbox-prompt {
  padding: 3px 8px;
  border-width: .5px;
}

.comparison-lightbox-video {
  max-height: calc(100dvh - 130px);
  object-fit: contain;
}

@media (min-width: 681px) {
  .comparison-lightbox-grid {
    align-items: stretch;
    overflow: hidden;
  }

  .comparison-lightbox-grid.is-all {
    grid-template-rows: repeat(2, minmax(0, 1fr));
  }

  .comparison-lightbox-grid:not(.is-all) {
    grid-template-rows: minmax(0, 1fr) minmax(96px, .35fr);
  }

  .comparison-lightbox-grid .result-video-card {
    display: flex;
    min-height: 0;
    flex-direction: column;
    overflow: hidden;
  }

  .comparison-lightbox-grid .result-video {
    width: 100%;
    height: 0;
    min-height: 0;
    max-height: none;
    flex: 1 1 0;
    aspect-ratio: auto;
    object-fit: contain;
  }

  .comparison-lightbox-grid .comparison-lightbox-prompt {
    min-height: 0;
    overflow-y: auto;
  }
}

/* Attention map */
.attention-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(250px, .75fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  padding: clamp(20px, 4vw, 46px);
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.attention-map-wrap {
  position: relative;
  width: min(100%, 540px);
  margin: auto;
  padding: 20px 0 24px 24px;
}

.attention-map {
  --grid-size: 9;
  position: relative;
  display: grid;
  grid-template-columns: repeat(var(--grid-size), minmax(0, 1fr));
  aspect-ratio: 1;
  border: 1px solid var(--line);
  background: var(--line-soft);
  gap: 2px;
  padding: 2px;
}

.attn-cell {
  position: relative;
  min-width: 0;
  border: 0;
  border-radius: 1px;
  cursor: crosshair;
  opacity: var(--cell-alpha, .65);
  transition: transform .14s ease, opacity .14s ease, filter .14s ease, box-shadow .14s ease;
}

.attn-cell.softmax {
  background: color-mix(in srgb, var(--coral) calc(var(--strength) * 100%), var(--coral-soft));
}

.attn-cell.linear {
  background: color-mix(in srgb, var(--blue) calc(var(--strength) * 100%), var(--blue-soft));
}

.attn-cell:hover,
.attn-cell:focus-visible {
  z-index: 2;
  outline: 2px solid var(--ink);
  outline-offset: 1px;
  opacity: 1;
  transform: scale(1.09);
}

.attention-map[data-filter="softmax"] .attn-cell:not(.softmax),
.attention-map[data-filter="linear"] .attn-cell:not(.linear) { filter: saturate(.25); opacity: .1; }

.attention-map.has-hover .attn-cell:not(.is-row):not(.is-col) { opacity: .12; }
.attention-map.has-hover .attn-cell.is-row {
  z-index: 1;
  opacity: 1;
  filter: saturate(1.3) brightness(1.08);
  box-shadow: inset 0 0 0 1px rgba(255, 253, 248, .72);
}
.attention-map.has-hover .attn-cell.is-col:not(.is-row) { opacity: .45; }
.attention-map.has-hover .attn-cell.is-hot {
  z-index: 3;
  opacity: 1;
  filter: saturate(1.4) brightness(1.12);
}

.axis-label {
  position: absolute;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.axis-y {
  top: 50%;
  left: -2px;
  transform: rotate(-90deg) translateX(-50%);
  transform-origin: top left;
}

.axis-x { bottom: -2px; left: 50%; transform: translateX(-50%); }

.legend-stack { display: grid; gap: 6px; }

.legend-item {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 11px;
  width: 100%;
  padding: 11px 10px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: background .16s ease, opacity .16s ease;
}

.legend-item:hover,
.legend-item.is-active { background: var(--code-bg); }
.legend-item:not(.is-active) { opacity: .65; }
.legend-item:hover { opacity: 1; }

.legend-item-static {
  padding: 8px 10px;
  cursor: default;
  opacity: 1 !important;
}

.legend-item-static:hover { background: transparent; }
.workload-category-legend { gap: 2px; }
.workload-figure .range-control { margin-top: 18px; }

.legend-item strong {
  display: block;
  font-size: .78rem;
}

.legend-item small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: .68rem;
  line-height: 1.45;
}

.legend-swatch {
  width: 28px;
  height: 12px;
  margin-top: 5px;
  border-radius: 2px;
}

.legend-swatch.softmax { background: var(--coral); }
.legend-swatch.linear { background: var(--blue); }
.legend-swatch.split { background: linear-gradient(90deg, var(--coral) 50%, var(--blue) 50%); }

.range-control {
  display: grid;
  gap: 8px;
  margin: 26px 10px 14px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .69rem;
}

.range-control-head {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.range-control output { color: var(--ink); font-weight: 700; white-space: nowrap; }

input[type="range"] {
  width: 100%;
  height: 3px;
  border-radius: 999px;
  appearance: none;
  background: linear-gradient(90deg, var(--coral), var(--accent));
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  width: 16px;
  height: 16px;
  border: 2px solid var(--paper);
  border-radius: 50%;
  appearance: none;
  background: var(--ink);
  box-shadow: 0 0 0 1px var(--ink);
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 2px solid var(--paper);
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 1px var(--ink);
}

.figure-summary {
  margin: 18px 10px 0 !important;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.4;
}

/* Branch figure */
.branch-stage {
  padding: 22px clamp(10px, 3vw, 32px) 18px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.branch-svg {
  display: block;
  width: 100%;
  height: auto;
  color: var(--ink);
  overflow: visible;
}

.branch-node { cursor: pointer; outline: none; }
.branch-node rect { fill: var(--paper); stroke: var(--ink); stroke-width: 1.5; filter: url(#soft-shadow); transition: opacity .2s ease, stroke-width .2s ease, transform .2s ease; transform-box: fill-box; transform-origin: center; }
.branch-node.soft rect { fill: var(--coral-soft); stroke: var(--coral); }
.branch-node.linear rect { fill: var(--accent-soft); stroke: var(--accent); }
.branch-node.fuse rect { fill: var(--orange-soft); stroke: var(--orange); }
.branch-node:hover rect,
.branch-node:focus-visible rect { stroke-width: 2.8; transform: translateY(-3px); }

.node-kicker {
  fill: var(--muted);
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
}

.node-title {
  fill: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
}

.node-note {
  fill: var(--muted);
  font-family: var(--mono);
  font-size: 10.5px;
}

.branch-path {
  fill: none;
  stroke-width: 2;
  transition: opacity .2s ease, stroke-width .2s ease;
}

.soft-path { stroke: var(--coral); }
.linear-path { stroke: var(--accent); }
.scan-line { fill: none; stroke: var(--accent); stroke-width: 1.5; }
.scan-line.reverse { stroke: var(--blue); }
.scan-arrow { fill: var(--accent); }
.scan-arrow.reverse { fill: var(--blue); }
.scan-motif circle { fill: var(--paper); stroke: var(--muted); stroke-width: 1.2; }

.branch-stage[data-focus="softmax"] .branch-node:not(.soft),
.branch-stage[data-focus="softmax"] .linear-path,
.branch-stage[data-focus="softmax"] .scan-motif,
.branch-stage[data-focus="linear"] .branch-node:not(.linear),
.branch-stage[data-focus="linear"] .soft-path,
.branch-stage[data-focus="fuse"] .branch-node:not(.fuse) { opacity: .22; }

.branch-stage[data-focus="softmax"] .soft-path,
.branch-stage[data-focus="linear"] .linear-path { stroke-width: 4; }
.branch-stage[data-focus="fuse"] .soft-path,
.branch-stage[data-focus="fuse"] .linear-path { opacity: .7; stroke-width: 3; }

.branch-captions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border-top: 1px solid var(--line);
  background: var(--line);
}

.branch-captions button {
  padding: 15px;
  border: 0;
  background: var(--paper);
  cursor: pointer;
  font-size: .73rem;
  line-height: 1.5;
  text-align: left;
  transition: background .16s ease;
}

.branch-captions button:hover,
.branch-captions button.is-active { background: var(--code-bg); }

.branch-captions button span {
  display: block;
  margin-bottom: 5px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .63rem;
}

.branch-captions strong { font-family: var(--serif); font-size: .95rem; font-weight: 500; }

.pull-quote {
  margin: 56px 0;
  padding: 6px 0 6px 32px;
  border-left: 2px solid var(--accent);
}

.pull-quote p {
  margin: 0 !important;
  font-family: var(--serif);
  font-size: clamp(1.12rem, 1.6vw, 1.35rem);
  font-style: italic;
  line-height: 1.4;
}

/* Equations and LSQ */
.equation-card {
  margin: 30px 0;
  padding: 22px 25px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.eq-label,
.equation-mini span,
.panel-kicker {
  display: block;
  color: var(--accent);
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.equation-card .equation {
  overflow-x: auto;
  padding: 2px 0;
  scrollbar-width: none;
}

.equation-card .equation::-webkit-scrollbar { display: none; }
.equation-card p { margin: 0 !important; color: var(--muted); font-size: .83rem; }

.note-ref {
  margin-left: .12em;
  font-size: .72em;
  line-height: 0;
}

.technical-footnote {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 7px;
  margin: -16px 0 28px;
  color: var(--muted);
  font-size: .72rem;
  line-height: 1.5;
}

.technical-footnote-mark {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.technical-footnote strong { color: var(--ink); }

.equation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 29px 0;
  border: 1px solid var(--line);
  background: var(--line);
  gap: 1px;
}

.equation-mini {
  min-width: 0;
  padding: 18px 14px 12px;
  background: var(--paper);
  text-align: center;
}

.equation-mini span { color: var(--muted); }

.lsq-steps {
  display: flex;
  border: 1px solid var(--line);
  border-bottom: 0;
  background: var(--paper);
}

.lsq-steps button {
  flex: 1;
  padding: 11px 14px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .68rem;
  text-align: left;
}

.lsq-steps button:last-child { border-right: 0; }
.lsq-steps button span { margin-right: 8px; color: var(--accent); }
.lsq-steps button[aria-selected="true"] { background: var(--code-bg); color: var(--ink); }

.lsq-stage {
  display: grid;
  grid-template-columns: 1fr 34px 1fr 34px 1fr;
  align-items: stretch;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.lsq-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  min-height: 210px;
  padding: 20px 16px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: #fbf8f2;
  opacity: .35;
  transform: scale(.98);
  transition: opacity .25s ease, transform .25s ease, border-color .25s ease, background .25s ease;
}

.lsq-stage[data-step="objective"] .objective-panel,
.lsq-stage[data-step="normal"] .normal-panel,
.lsq-stage[data-step="solve"] .solve-panel {
  border-color: var(--accent);
  background: var(--accent-soft);
  opacity: 1;
  transform: scale(1);
}

.lsq-stage[data-step="normal"] .objective-panel,
.lsq-stage[data-step="solve"] .objective-panel,
.lsq-stage[data-step="solve"] .normal-panel { opacity: .74; transform: scale(1); }

.lsq-panel p { margin: auto 0 0 !important; color: var(--muted); font-size: .72rem; line-height: 1.5; }
.lsq-panel .hero-equation { min-height: 104px; display: grid; place-items: center; overflow: hidden; font-size: .85rem; }
.lsq-panel .hero-equation.boxed { color: var(--accent); font-size: 1rem; }
.lsq-arrow { display: grid; place-items: center; color: var(--muted); font-family: var(--serif); font-size: 1.6rem; }

.matrix-story {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(5px, 1vw, 11px);
  min-height: 230px;
  margin-top: 18px;
  padding: 28px 18px 18px;
  border: 1px solid var(--line);
  background: var(--paper);
  overflow-x: auto;
}

.matrix-block { position: relative; flex: 0 0 auto; }
.matrix-name { position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%); color: var(--muted); font-family: var(--mono); font-size: .57rem; white-space: nowrap; }
.matrix-grid { display: grid; grid-template-columns: repeat(4, 18px); grid-template-rows: repeat(4, 18px); gap: 2px; padding: 6px; border-left: 2px solid var(--ink); border-right: 2px solid var(--ink); }
.matrix-grid i,
.vector-grid i { display: block; border-radius: 2px; transition: transform .16s ease, opacity .16s ease, background .16s ease; }
.matrix-block:hover i { transform: scale(1.1); }
.matrix-blue i { background: color-mix(in srgb, var(--blue) calc(var(--v) * 100%), #edf2f1); }
.matrix-neutral i { background: color-mix(in srgb, #767676 calc(var(--v) * 100%), #f2efe8); }
.matrix-identity i { background: color-mix(in srgb, var(--coral) calc(var(--v) * 72%), #f5eee9); }
.matrix-coral i { background: color-mix(in srgb, var(--coral) calc(var(--v) * 100%), var(--coral-soft)); }
.vector-grid { display: grid; gap: 2px; padding: 5px; border-top: 2px solid transparent; border-bottom: 2px solid transparent; }
.vector-grid:not(.row) { grid-template-rows: repeat(4, 18px); width: 28px; border-left: 2px solid var(--ink); border-right: 2px solid var(--ink); }
.vector-grid.row { grid-template-columns: repeat(4, 18px); height: 28px; border-top-color: var(--ink); border-bottom-color: var(--ink); }
.vector-orange i { background: color-mix(in srgb, var(--orange) calc(var(--v) * 100%), var(--orange-soft)); }
.rank-one { display: flex; align-items: center; gap: 6px; }
.matrix-equals,
.matrix-op,
.matrix-paren { font-family: var(--serif); font-size: 1.7rem; }
.matrix-op.compact { font-size: 1.1rem; }
.matrix-paren { font-size: 4rem; font-weight: 300; line-height: 1; }
.inverse-factor {
  position: relative;
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 5px;
}
.inverse-factor > sup { position: absolute; top: -13px; right: -9px; font-family: var(--mono); font-size: .65rem; }
.inverse-factor .correction-name { bottom: calc(100% + 27px); }
.inverse-factor .factor-name {
  bottom: calc(100% + 6px);
  color: var(--coral);
  font-family: var(--serif);
  font-size: .8rem;
  font-weight: 600;
}

.vda-properties {
  list-style: none;
  margin: 28px 0 38px !important;
  padding: 0;
  border-top: 1px solid var(--line);
}

.vda-properties li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  margin: 0 !important;
  padding: 18px 2px;
  border-bottom: 1px solid var(--line);
}

.property-index {
  color: var(--accent);
  font-family: var(--mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .08em;
}

.vda-properties strong {
  display: block;
  margin-bottom: 5px;
  font-family: var(--serif);
  font-size: 1.08rem;
  font-weight: 500;
}

.vda-properties p {
  margin: 0 !important;
  color: var(--muted);
  font-size: .86rem;
  line-height: 1.58;
}

#negotiation,
#spectrum-proof { scroll-margin-top: 24px; }

/* Spectrum */
.spectrum-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 28px;
  align-items: center;
  padding: 22px clamp(18px, 4vw, 42px);
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.spectrum-plot { display: block; width: 100%; height: auto; overflow: visible; }
.spectrum-plot text { font-family: var(--sans); }
.spectrum-plot .grid { stroke: var(--line-soft); stroke-width: 1; }
.spectrum-plot .axis { stroke: var(--muted); stroke-width: 1; }
.spectrum-plot .stable-band { fill: var(--accent-soft); opacity: .55; }
.spectrum-plot .sana-curve { fill: none; stroke: var(--coral); stroke-width: 3; }
.spectrum-plot .vda-curve { fill: none; stroke: var(--accent); stroke-width: 3; }
.spectrum-plot .cursor { stroke: var(--ink); stroke-width: 1; stroke-dasharray: 4 4; opacity: .45; }
.spectrum-plot .sana-dot { fill: var(--coral); stroke: var(--paper); stroke-width: 3; }
.spectrum-plot .vda-dot { fill: var(--accent); stroke: var(--paper); stroke-width: 3; }
.spectrum-plot .plot-label { fill: var(--muted); font-size: 11px; }
.spectrum-plot .curve-label { font-family: var(--mono); font-size: 12px; font-weight: 600; }

.spectrum-readout {
  display: grid;
  gap: 13px;
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbf8f2;
}

.spectrum-readout label { display: grid; gap: 3px; color: var(--muted); font-family: var(--mono); font-size: .68rem; }
.spectrum-readout label strong { color: var(--ink); font-size: .95rem; }
.readout-row { display: flex; justify-content: space-between; gap: 12px; padding-top: 10px; border-top: 1px solid var(--line); font-family: var(--mono); font-size: .7rem; }
.readout-row output { font-weight: 700; }
.readout-row.sana output { color: var(--coral); }
.readout-row.vda output { color: var(--accent); }
.spectrum-readout p { margin: 2px 0 0 !important; color: var(--muted); font-size: .72rem; line-height: 1.5; }

/* Training */
.training-timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 38px 0 54px;
}

.training-timeline::before {
  content: "";
  position: absolute;
  top: 20px;
  right: 8%;
  left: 8%;
  height: 1px;
  background: var(--line);
}

.timeline-step { position: relative; display: grid; gap: 12px; }
.timeline-step > span { position: relative; z-index: 1; display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 50%; background: var(--paper); color: var(--accent); font-family: var(--mono); font-size: .65rem; }
.timeline-step div { padding-top: 5px; }
.timeline-step strong { font-family: var(--serif); font-size: 1.15rem; font-weight: 500; }
.timeline-step p { margin: 6px 0 0 !important; color: var(--muted); font-size: .72rem; line-height: 1.55; }

.references-list { padding-left: 22px; font-size: .9rem; }
.references-list li { padding-left: 5px; }

.bibtex-section {
  margin-top: 42px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.bibtex-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.bibtex-head h3 { margin: 0; }

.bibtex-head button {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--accent);
  font-family: var(--mono);
  font-size: .56rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
  cursor: pointer;
}

.bibtex-head button:hover,
.bibtex-head button:focus-visible {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.bibtex-section pre {
  margin: 14px 0 0;
  padding: 16px 18px;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  border: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--paper) 78%, var(--bg));
  color: var(--ink);
  font-family: var(--mono);
  font-size: .68rem;
  line-height: 1.65;
}

.bibtex-section code { font-family: inherit; }

.site-footer {
  width: min(1360px, calc(100% - 40px));
  margin: 0 auto;
  padding: 32px 0 42px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: .7rem;
  letter-spacing: .03em;
}

.footer-brand { opacity: .65; }
.footer-brand .brand-logo { width: 30px; height: 30px; }

@media (min-width: 1120px) {
  .article-shell {
    width: min(1360px, calc(100% - 40px));
    display: block;
  }

  .article-content {
    width: min(960px, 100%);
    max-width: none;
  }
}

@media (max-width: 1119px) {
  .toc-desktop { display: none; }
  .toc-mobile { display: block; }
}

@media (min-width: 681px) and (max-width: 1119px) {
  .toc-mobile {
    position: relative;
    max-height: none;
    overflow: visible;
  }

  .article-content { margin-top: 42px; }
}

@media (max-width: 900px) {
  .attention-layout,
  .spectrum-layout { grid-template-columns: 1fr; }
  .comparison-lightbox-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .comparison-lightbox-video { max-height: none; }
  .attention-copy { max-width: 560px; margin: 0 auto; }
  .lsq-stage { grid-template-columns: 1fr; gap: 10px; }
  .lsq-arrow { height: 20px; transform: rotate(90deg); }
  .lsq-panel { min-height: 170px; }
  .training-timeline { grid-template-columns: repeat(2, 1fr); }
  .training-timeline::before { display: none; }
}

@media (max-width: 680px) {
  .vdn-result-strip-controls { gap: 5px; }
  .vdn-result-strip-controls button { width: 32px; height: 32px; }
  .vdn-result-strip-controls output { min-width: 54px; }
  .vdn-result-card { width: calc(100% - 28px); }
  #introduction > .vdn-result-showcase + h2 { margin-top: 58px; }
  .qualitative-results { margin-top: 30px; }
  .qualitative-results-head { display: block; }
  .qualitative-results-head p { margin-top: 7px !important; text-align: left; }
  .is-featured .qualitative-results-head { width: 90vw; }
  .comparison-gallery { gap: 18px; }
  .comparison-sample { padding: 10px; }
  .comparison-sample-head { gap: 12px; }
  .comparison-sample-heading { flex-basis: 100%; }
  .comparison-sample-actions { width: 100%; justify-content: flex-end; }
  .comparison-inline-transport {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 9px 12px;
  }
  .comparison-inline-seek { grid-column: 1 / -1; grid-row: 1; }
  .comparison-inline-time { grid-column: 1; grid-row: 2; }
  .comparison-inline-speed { grid-column: 2; grid-row: 2; }
  .result-comparison { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; }
  .result-comparison.is-all { grid-template-columns: minmax(0, 1fr); }
  .result-video-card { padding: 6px; }
  .comparison-lightbox { width: 100vw; height: 100dvh; max-height: none; }
  .comparison-lightbox-shell { height: 100dvh; max-height: none; padding: 3px 7px; }
  .comparison-lightbox-toolbar {
    grid-template-columns: minmax(0, 1fr);
    gap: 3px;
  }
  .comparison-lightbox-head { flex-wrap: wrap; gap: 12px; }
  .comparison-lightbox-controls {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
  .comparison-lightbox-action,
  .comparison-lightbox-close { width: 100%; }
  .comparison-lightbox-prompt {
    max-height: 104px;
    margin-bottom: 12px;
    padding: 9px 10px;
  }
  .comparison-lightbox-prompt-head { display: block; }
  .comparison-lightbox-prompt-head small { display: block; margin-top: 3px; }
  .comparison-lightbox-transport {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 9px 12px;
    padding-bottom: 14px;
  }
  .comparison-lightbox-seek { grid-column: 1 / -1; grid-row: 1; }
  .comparison-lightbox-time { grid-column: 1; grid-row: 2; }
  .comparison-speed-control { grid-column: 2; grid-row: 2; }
  .comparison-lightbox-grid {
    grid-template-columns: minmax(0, 1fr);
    align-content: start;
    align-items: start;
    column-gap: 6px;
    row-gap: 2px;
    padding-top: 2px;
  }
  .comparison-lightbox-grid.is-all { grid-template-columns: minmax(0, 1fr); }
  .comparison-lightbox-grid .comparison-lightbox-prompt { grid-column: auto; }
  .comparison-lightbox-note { font-size: .68rem; }
  .article-shell,
  .site-footer { width: min(100% - 28px, 1120px); }
  .site-header { padding: 12px 14px; }
  .site-nav { gap: 18px; }
  .site-nav a:first-child { display: none; }
  .brand-wordmark { display: none; }
  .article-hero { padding: 52px 0 36px; }
  .article-hero h1 { font-size: clamp(2.3rem, 10.5vw, 3.5rem); }
  .article-resource-links { margin-top: 16px; }
  .article-resource-link { min-height: 38px; padding: 7px 13px; font-size: .78rem; }
  .article-subtitle { margin-top: 17px; }
  .article-content { margin-top: 40px; font-size: .98rem; }
  .article-content h2 { margin-top: 62px; }
  .viz-card { width: 100%; margin-top: 36px; margin-bottom: 34px; }
  .viz-head { padding: 0 5px; }
  .viz-hint { width: 100%; margin: 0; }
  .viz-head.is-status-only .viz-hint { width: auto; margin-left: auto; }
  .attention-layout { padding: 18px 14px 24px; }
  .attention-map-wrap { padding-left: 20px; }
  .axis-y { left: -2px; }
  .branch-stage { padding: 8px 2px 14px; overflow-x: auto; }
  .branch-svg { min-width: 680px; }
  .branch-captions { grid-template-columns: 1fr; }
  .pull-quote { padding-left: 20px; }
  .equation-grid { grid-template-columns: 1fr; }
  .lsq-steps button { padding: 10px 7px; font-size: .58rem; text-align: center; }
  .lsq-steps button span { display: block; margin: 0 0 2px; }
  .matrix-story { justify-content: flex-start; }
  .spectrum-layout { padding: 16px 10px; }
  .training-timeline { grid-template-columns: 1fr; }
  .site-footer { align-items: flex-start; gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}


.attention-flow {
  position: absolute;
  z-index: 1;
  inset: 2px;
  width: calc(100% - 4px);
  height: calc(100% - 4px);
  overflow: visible;
  color: rgba(255, 253, 248, .96);
  opacity: .9;
  filter: drop-shadow(0 .02px .04px rgba(22, 21, 19, .55));
  pointer-events: none;
  transition: opacity .16s ease;
}

.attention-flow path {
  fill: none;
  stroke: currentColor;
  stroke-width: .065;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.attention-flow .arrow-head { stroke-width: .095; }

.attention-flow-row {
  opacity: .78;
  transition: opacity .14s ease, filter .14s ease;
}

.attention-map.has-hover .attention-flow-row { opacity: .1; }
.attention-map.has-hover .attention-flow-row.is-row {
  opacity: 1;
  filter: drop-shadow(0 0 .09px rgba(22, 21, 19, .9));
}
.attention-map[data-filter="softmax"] .attention-flow { opacity: .08; }

/* Typeset mathematical content as article content rather than embedded widgets. */
mjx-container {
  color: currentColor;
  font-size: 106% !important;
}

mjx-container[jax="CHTML"][display="true"] {
  max-width: 100%;
  margin: .7em 0 !important;
  padding: .18em 0 .3em;
  overflow-x: auto;
  overflow-y: hidden;
}

.equation,
.route-formula {
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

/* Figure 01: live compute split before the matrix. */
.attention-share {
  display: grid;
  grid-template-columns: auto minmax(80px, 1fr) auto;
  gap: 10px;
  align-items: center;
  margin: 0 2px 12px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .6rem;
  letter-spacing: .02em;
}

.share-label {
  display: inline-flex;
  gap: 5px;
  align-items: baseline;
}

.share-label strong { font-size: .72rem; }
.softmax-share strong { color: var(--coral); }
.linear-share strong { color: var(--blue); }

.share-track {
  position: relative;
  height: 6px;
  border-radius: 999px;
  background: var(--blue);
  overflow: hidden;
}

.share-track i {
  position: absolute;
  inset: 0 auto 0 0;
  width: 19%;
  border-radius: inherit;
  background: var(--coral);
  transition: width .3s cubic-bezier(.2, .75, .25, 1);
}

/* Figure 02: complete two-branch projection and VDA architecture. */
.branch-stage-complex {
  padding: 14px 14px 0;
  overflow-x: auto;
}

.branch-svg-complex {
  min-width: 1040px;
  overflow: visible;
}

.branch-part {
  cursor: pointer;
  outline: none;
  transition: opacity .22s ease;
}

.branch-stage-complex[data-focus="softmax"] .branch-part:not(.soft-part):not(.shared-part),
.branch-stage-complex[data-focus="linear"] .branch-part:not(.linear-part):not(.detail-part):not(.shared-part),
.branch-stage-complex[data-focus="fuse"] .branch-part:not(.soft-part):not(.linear-part):not(.fuse-part) {
  opacity: .13;
}

.branch-stage-complex[data-focus="softmax"] .soft-path,
.branch-stage-complex[data-focus="linear"] .linear-path,
.branch-stage-complex[data-focus="fuse"] .soft-path,
.branch-stage-complex[data-focus="fuse"] .linear-path {
  stroke-width: 3.4;
}

.shared-path { stroke: var(--ink); }
.arch-input,
.arch-output,
.arch-qkv-shell {
  fill: #fbf8f2;
  stroke: var(--ink);
  stroke-width: 1.5;
}

.arch-output { fill: var(--orange-soft); stroke: var(--orange); }
.qkv-pill rect { fill: var(--paper); stroke: var(--ink); stroke-width: 1.2; }
.qkv-pill text,
.small-title,
.detail-lane text,
.detail-box + text {
  fill: var(--ink);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
}

.arch-box {
  stroke-width: 1.6;
}

.arch-box.soft-fill { fill: var(--coral-soft); stroke: var(--coral); }
.arch-box.linear-fill { fill: var(--accent-soft); stroke: var(--accent); }
.arch-small {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 1.25;
}

.arch-small.gate-box {
  fill: var(--orange-soft);
  stroke: var(--orange);
}

.multiply-node {
  fill: var(--paper);
  stroke-width: 1.7;
}

.soft-multiply { stroke: var(--coral); }
.linear-multiply { stroke: var(--accent); }
.multiply-label,
.sum-label {
  fill: var(--ink);
  font-family: var(--serif);
  font-size: 22px;
}

.sum-node { fill: var(--orange-soft); stroke: var(--orange); stroke-width: 1.8; }
.sum-label { font-size: 30px; }
.window-mini rect { fill: color-mix(in srgb, var(--coral-soft) 45%, var(--paper)); }
.window-mini rect.hot { fill: var(--coral); opacity: .78; }
.scan-glyph { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.detail-shell {
  fill: #f6f2ea;
  stroke: var(--line);
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
}

.detail-title {
  fill: var(--ink);
  font-family: var(--serif);
  font-size: 20px;
}

.detail-box {
  fill: var(--paper);
  stroke: var(--line);
  stroke-width: 1.2;
}

.detail-box.gate-detail { fill: var(--orange-soft); stroke: var(--orange); }
.detail-box.math-detail { fill: var(--blue-soft); stroke: var(--blue); }
.detail-box.accent-detail { fill: var(--accent-soft); stroke: var(--accent); }
.detail-box.scan-detail { fill: #f7f4ed; stroke: var(--accent-mid); }
.detail-path { fill: none; stroke: var(--muted); stroke-width: 1.25; }
.detail-kicker { fill: var(--muted); font-family: var(--mono); font-size: 8.5px; letter-spacing: .08em; }
.detail-note { fill: var(--muted); font-family: var(--mono); font-size: 9px; }
.math-detail + text,
.math-detail text { font-family: var(--mono); font-size: 11px; }

.branch-captions-complex { grid-template-columns: repeat(3, 1fr); }

/* Matrix brackets for the frame-wise solve. */
.matrix-grid,
.vector-grid {
  position: relative;
  border: 0 !important;
  margin: 4px;
}

.matrix-grid::before,
.matrix-grid::after,
.vector-grid::before,
.vector-grid::after {
  content: "";
  position: absolute;
  top: -2px;
  bottom: -2px;
  width: 6px;
  pointer-events: none;
}

.matrix-grid::before,
.vector-grid::before {
  left: -4px;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  border-left: 2px solid var(--ink);
}

.matrix-grid::after,
.vector-grid::after {
  right: -4px;
  border-top: 2px solid var(--ink);
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

/* Prose-led stability derivation: cards hold equations, not the explanation. */
.spectral-definition { border-left: 4px solid var(--blue); }
.native-transition-card { border-left: 4px solid var(--blue); }
.cumulative-transition-card { border-left: 4px solid var(--coral); }
.vda-transition-card { border-left: 4px solid var(--accent); }

#spectrum .equation-card .equation {
  overflow-x: visible;
}

#spectrum mjx-container[jax="CHTML"][display="true"] { overflow: visible; }

.geometry-comparison-card { border-left: 4px solid var(--blue); }
.objective-gap-card { border-left: 4px solid var(--accent); }

/* Figure 03: teacher, alignment graph, and co-adapted result. */
.status-legend,
.status-legend > span {
  display: inline-flex;
  align-items: center;
}

.status-legend { gap: 14px; }
.status-legend > span { gap: 5px; }

.status-icon {
  display: inline-block;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  background: currentColor;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-size: contain;
  mask-size: contain;
}

.status-icon.frozen {
  color: var(--blue);
  -webkit-mask-image: url("./assets/icons/snowflake.svg");
  mask-image: url("./assets/icons/snowflake.svg");
}

.status-icon.hot {
  color: var(--coral);
  -webkit-mask-image: url("./assets/icons/flame.svg");
  mask-image: url("./assets/icons/flame.svg");
}

.transplant-stage {
  display: grid;
  grid-template-columns: minmax(135px, .68fr) minmax(360px, 1.7fr) minmax(135px, .68fr);
  gap: 12px;
  align-items: center;
  padding: clamp(18px, 2.25vw, 28px);
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.transplant-panel,
.model-stack { min-width: 0; }

/* Old hot-reloaded DOM may still contain the removed inter-stage arrows. */
.stage-arrow { display: none !important; }

.transplant-title {
  display: grid;
  gap: 5px;
  margin-bottom: 18px;
  text-align: center;
}

.transplant-title span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: .57rem;
  font-weight: 700;
  letter-spacing: .08em;
}

.transplant-title strong {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.15;
}

.transplant-panel > p,
.model-stack > p {
  margin: 16px 0 0 !important;
  color: var(--muted);
  font-size: .66rem;
  line-height: 1.5;
  text-align: center;
}

.stack-nodes { display: grid; justify-items: center; gap: 3px; }
.stack-nodes > i { height: 12px; color: var(--muted); font-style: normal; line-height: 12px; }
.stack-node {
  position: relative;
  width: 100%;
  padding: 10px 9px;
  border: 1.3px solid var(--ink);
  border-radius: 8px;
  background: #f4f1ea;
  font-size: .68rem;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
}

.teacher-attention-node { border-color: var(--accent); background: var(--accent-soft); }
.warm-node { border-color: var(--coral); background: #f7e8e0; }
.mixed-node { border-color: var(--accent); background: linear-gradient(90deg, var(--coral-soft), var(--accent-soft)); }

.alignment-panel {
  padding: 20px 20px 14px;
  border-radius: 14px;
  border: 1px dashed var(--muted);
  background: #fbf8f2;
}

.alignment-architecture {
  position: relative;
  width: 100%;
  max-width: 500px;
  aspect-ratio: 5 / 4;
  margin: 0 auto;
}

.alignment-connectors {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.alignment-line {
  fill: none;
  stroke-width: 2.3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.alignment-line.shared-line { stroke: var(--blue); }
.alignment-line.softmax-line { stroke: var(--blue); }
.alignment-line.vda-line { stroke: var(--coral); }

.alignment-node {
  position: absolute;
  z-index: 1;
  display: grid;
  place-content: center;
  gap: 1px;
  border: 1.5px solid;
  border-radius: 10px;
  font-size: clamp(.62rem, 1.2vw, .76rem);
  font-weight: 600;
  line-height: 1.15;
  text-align: center;
}

.student-stack .stage-b-frozen::after,
.student-stack .stage-b-trainable::after,
.alignment-node.frozen-node::after,
.alignment-node.hot-node::after {
  position: absolute;
  top: 6px;
  right: 7px;
  width: 13px;
  height: 13px;
  background: currentColor;
  content: "";
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-size: contain;
  mask-size: contain;
}

.student-stack .stage-b-frozen::after,
.alignment-node.frozen-node::after {
  color: var(--blue);
  -webkit-mask-image: url("./assets/icons/snowflake.svg");
  mask-image: url("./assets/icons/snowflake.svg");
}

.student-stack .stage-b-trainable::after,
.alignment-node.hot-node::after {
  color: var(--coral);
  -webkit-mask-image: url("./assets/icons/flame.svg");
  mask-image: url("./assets/icons/flame.svg");
}

.student-stack .stage-b-frozen { border-color: var(--blue); background: var(--blue-soft); color: #315d6d; }
.alignment-node.frozen-node { border-color: var(--blue); background: var(--blue-soft); color: #315d6d; }
.alignment-node.hot-node { border-color: var(--coral); background: var(--coral-soft); color: #6d3025; }
.alignment-mlp { top: 0; left: 28%; width: 44%; height: 18%; }
.alignment-softmax-gate { top: 27%; left: 6%; width: 38%; height: 13%; }
.alignment-far-gate { top: 27%; right: 6%; width: 38%; height: 13%; }
.alignment-softmax { top: 53%; left: 3%; width: 44%; height: 18%; }
.alignment-vda { top: 53%; right: 3%; width: 44%; height: 18%; }
.alignment-qkv { top: 82%; left: 28%; width: 44%; height: 15%; }

@media (max-width: 1040px) {
  .transplant-stage { grid-template-columns: 1fr; max-width: 680px; margin: auto; }
}

@media (max-width: 760px) {
  mjx-container { font-size: 98% !important; }
  .attention-share { grid-template-columns: 1fr 1fr; }
  .share-track { grid-column: 1 / -1; grid-row: 2; }
  .linear-share { justify-self: end; }
  .branch-svg-complex { min-width: 980px; }
}

.branch-shell { fill: #fbf8f2; stroke: var(--line); stroke-width: 1.4; }
.branch-shell.soft-shell { fill: color-mix(in srgb, var(--coral-soft) 28%, var(--paper)); }
.branch-shell.linear-shell { fill: color-mix(in srgb, var(--accent-soft) 32%, var(--paper)); }

/* Keep article visuals aligned with the reading column. */
.article-content .viz-card {
  width: 100%;
  max-width: 100%;
  margin-right: 0;
  margin-left: 0;
  transform: none;
}

.article-content .viz-card { margin-top: 42px; margin-bottom: 40px; }
.article-content figure,
.article-content img { max-width: 100%; }
.branch-stage-complex { max-width: 100%; overflow-x: auto; }

@media (max-width: 680px) {
  .article-content .viz-card { width: 100%; margin-top: 36px; margin-bottom: 34px; }
}

/* Figure 02: a compact, symmetric split into two independently gated paths. */
.branch-stage-simple {
  max-width: 100%;
  padding: 14px 14px 0;
  overflow: hidden;
}

.branch-canvas {
  position: relative;
  width: 100%;
  min-width: 0;
  padding-bottom: 0;
}

.branch-svg-simple {
  width: 100%;
  min-width: 0;
  overflow: visible;
}

.simple-shell {
  fill: #f7f5ef;
  stroke: var(--ink);
  stroke-width: 1.5;
}

.simple-node {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 1.45;
  transition: filter .18s ease;
}

.soft-node {
  fill: var(--coral-soft);
  stroke: var(--coral);
}

.linear-node {
  fill: var(--accent-soft);
  stroke: var(--accent);
}

.gate-node {
  fill: var(--orange-soft);
  stroke: var(--orange);
}

.shared-node {
  fill: var(--blue-soft);
  stroke: var(--blue);
}

.output-node {
  fill: #edf0e8;
  stroke: var(--ink);
}

.simple-kicker {
  fill: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
}

.simple-title {
  fill: var(--ink);
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 500;
}

.simple-title.shared-title { font-size: 17px; }

.simple-output-title {
  fill: var(--ink);
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 500;
}

.simple-output-math {
  display: grid;
  width: 100%;
  height: 100%;
  place-items: center;
  font-size: 10px;
  line-height: 1;
}

.simple-output-math mjx-container { margin: 0 !important; }
.soft-part .simple-output-math { color: var(--coral); }
.linear-part .simple-output-math { color: var(--accent); }

.simple-label,
.simple-input-label {
  fill: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
}

.simple-input-label {
  fill: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
}

.simple-path {
  fill: none;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: opacity .2s ease, stroke-width .2s ease;
}

.neutral-path { stroke: var(--ink); }

.simple-operator {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 1.8;
}

.simple-operator.soft-gate { stroke: var(--coral); }
.simple-operator.linear-gate { stroke: var(--accent); }
.simple-operator.sum-operator { fill: none; stroke: var(--ink); }

.simple-operator-label {
  fill: var(--ink);
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 500;
}

.simple-operator-label.gate-symbol { font-size: 24px; }

.branch-block {
  cursor: help;
  outline: none;
  transition: opacity .16s ease;
}

.branch-block:hover .simple-node,
.branch-block:focus-visible .simple-node {
  filter: drop-shadow(0 3px 5px rgba(32, 28, 20, .12));
}

.branch-block:hover .simple-operator,
.branch-block:focus-visible .simple-operator,
.branch-block:hover .sigmoid-node,
.branch-block:focus-visible .sigmoid-node {
  filter: drop-shadow(0 3px 5px rgba(32, 28, 20, .12));
}

.block-hit-area {
  fill: transparent;
  stroke: none;
}

.branch-stage-simple[data-focus="softmax"] .branch-part:not(.soft-part):not(.shared-part),
.branch-stage-simple[data-focus="linear"] .branch-part:not(.linear-part):not(.shared-part),
.branch-stage-simple[data-focus="fuse"] .shared-part {
  opacity: .34;
}

.branch-stage-simple[data-focus="softmax"] .soft-path,
.branch-stage-simple[data-focus="linear"] .linear-path,
.branch-stage-simple[data-focus="fuse"] .merge-path {
  opacity: 1;
}

/* Gated addition is only the final merge, not a reactivation of either attention path. */
.branch-stage-simple[data-focus="fuse"] .soft-part .branch-block,
.branch-stage-simple[data-focus="fuse"] .linear-part .branch-block {
  opacity: .24;
}

.branch-stage-simple[data-focus="fuse"] .soft-part .simple-path:not(.merge-path),
.branch-stage-simple[data-focus="fuse"] .linear-part .simple-path:not(.merge-path) {
  opacity: .22;
  stroke-width: 1.9;
}

.branch-stage-simple[data-focus="fuse"] .merge-path {
  opacity: 1;
  stroke-width: 2.8;
}

.branch-stage-simple[data-block] .branch-block:not(.is-active) { opacity: .5; }
.branch-stage-simple[data-block] .simple-path:not(.input-tail) { opacity: .42; }
.branch-stage-simple[data-block][data-focus="softmax"] .soft-path,
.branch-stage-simple[data-block][data-focus="linear"] .linear-path,
.branch-stage-simple[data-block][data-focus="fuse"] .merge-path { opacity: 1; }

.branch-tooltip {
  position: absolute;
  z-index: 6;
  width: max-content;
  max-width: min(380px, calc(100% - 16px));
  padding: 10px 12px 11px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: color-mix(in srgb, var(--paper) 96%, transparent);
  box-shadow: 0 8px 26px rgba(32, 28, 20, .14);
  color: var(--ink);
  font-size: .72rem;
  line-height: 1.48;
  opacity: 0;
  pointer-events: none;
  transition: opacity .12s ease;
}

.branch-tooltip.on {
  opacity: 1;
}

.branch-tooltip-title {
  display: block;
  margin-bottom: 4px;
  font-family: var(--serif);
  font-size: .96rem;
  font-weight: 500;
  line-height: 1.2;
}

.branch-tooltip-formula {
  display: block;
  margin: 5px 0;
  color: var(--accent);
  font-family: var(--serif);
  font-size: .74rem;
  font-weight: 500;
  line-height: 1.45;
}

.branch-tooltip-formula mjx-container { margin: 0 !important; }

.branch-tooltip-copy { color: var(--muted); }

.branch-captions-simple { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (max-width: 680px) {
  .branch-tooltip {
    max-width: calc(100% - 24px);
    padding: 7px 8px 8px;
    font-size: .6rem;
    line-height: 1.32;
  }
  .branch-tooltip-title {
    margin-bottom: 2px;
    font-size: .8rem;
  }
  .branch-tooltip-formula {
    margin: 2px 0;
    font-size: .64rem;
    line-height: 1.25;
  }
}

/* Figure 02 gate glyphs: paired trapezoids, matching the architecture notation. */
.gate-shape {
  transition: filter .18s ease;
}

.gate-shape .gate-half {
  stroke-width: 1.55;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.soft-gate-shape .gate-half {
  fill: var(--coral-soft);
  stroke: var(--coral);
}

.linear-gate-shape .gate-half {
  fill: var(--accent-soft);
  stroke: var(--accent);
}

.gate-shape-label {
  fill: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .1em;
}

.input-junction { fill: var(--ink); }

.branch-block:hover .gate-half,
.branch-block:focus-visible .gate-half {
  filter: drop-shadow(0 3px 5px rgba(32, 28, 20, .12));
}

/* Figure 02: explicit sigmoid between each gate projection and multiplier. */
.sigmoid-node {
  fill: var(--paper);
  stroke-width: 1.55;
}

.soft-gate-shape .sigmoid-node { stroke: var(--coral); }
.linear-gate-shape .sigmoid-node { stroke: var(--accent); }

.sigmoid-label {
  fill: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
}

/* Figure 02: mathematically sized operators and paper-style sigmoid nodes. */
.operator-stroke {
  stroke: var(--ink);
  stroke-width: 2.4;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.sigmoid-node,
.soft-gate-shape .sigmoid-node,
.linear-gate-shape .sigmoid-node {
  fill: var(--paper);
  stroke: var(--ink);
}

.sigmoid-label {
  fill: var(--coral);
  font-family: Georgia, var(--serif);
  font-size: 18px;
  font-style: italic;
  font-weight: 600;
}

/* Figure 02 final operator treatment. */
.final-output-line {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.9;
  stroke-linecap: round;
}

.final-output-arrow { fill: var(--ink); }

.simple-operator.sum-operator {
  fill: none;
  stroke: var(--ink);
}

.soft-part .multiply-stroke { stroke: var(--coral); }
.linear-part .multiply-stroke { stroke: var(--accent); }

.soft-gate-shape .sigmoid-label { fill: var(--coral); }
.linear-gate-shape .sigmoid-label { fill: var(--accent); }

/* Figure 02: black, unfilled sum node with an explicit outgoing arrow. */
.final-output-arrow {
  fill: none;
  stroke: var(--ink);
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.simple-operator.sum-operator,
.sum-stroke {
  fill: none;
  stroke: var(--ink);
}

/* Representative 16-cell workload: two cells per VAE temporal unit. */
.workload-figure {
  --workload-gap: 4px;
}

.workload-head .mjx-container { margin: 0 !important; }

.workload-attention-map .attn-cell.anchor {
  background: color-mix(in srgb, var(--matrix-anchor) calc(var(--strength) * 72%), #eadcb7);
}

.workload-attention-map .attn-cell.text {
  background: color-mix(in srgb, var(--matrix-text) calc(var(--strength) * 100%), var(--matrix-text-soft));
  opacity: var(--cell-alpha, .94);
}

.workload-attention-map .attn-cell.audio {
  background: color-mix(in srgb, var(--matrix-audio) calc(var(--strength) * 100%), var(--matrix-audio-soft));
  opacity: var(--cell-alpha, .92);
}

.workload-attention-map .attn-cell {
  cursor: crosshair;
  pointer-events: auto;
}

.workload-attention-map .attn-cell.is-pinned {
  z-index: 4;
  outline: 2px solid var(--ink);
  outline-offset: 1px;
  transform: scale(1.09);
}

.workload-figure .viz-tooltip {
  z-index: 20;
  border-color: color-mix(in srgb, var(--teal) 42%, var(--line));
  background: color-mix(in srgb, var(--paper) 96%, white);
  box-shadow: 0 8px 28px rgba(32, 28, 20, .2);
}

.workload-category-legend .legend-item {
  padding: 8px 10px;
  opacity: 1;
}

.workload-category-legend.has-active-filter .legend-item:not(.is-active) {
  opacity: .42;
}

/* Keep the 16 cells compact while making each two-cell VAE unit legible. */
.workload-attention-map .attn-cell.vae-col-end {
  box-shadow: inset -1px 0 color-mix(in srgb, var(--paper) 72%, transparent);
}

.workload-attention-map .attn-cell.vae-row-end {
  box-shadow: inset 0 -1px color-mix(in srgb, var(--paper) 72%, transparent);
}

.workload-attention-map .attn-cell.vae-col-end.vae-row-end {
  box-shadow:
    inset -1px 0 color-mix(in srgb, var(--paper) 72%, transparent),
    inset 0 -1px color-mix(in srgb, var(--paper) 72%, transparent);
}

.workload-attention-map[data-filter="anchor"] .attn-cell:not(.anchor) {
  filter: saturate(.25);
  opacity: .1;
}

.workload-attention-map[data-filter="text"] .attn-cell:not(.text),
.workload-attention-map[data-filter="audio"] .attn-cell:not(.audio) {
  filter: saturate(.25);
  opacity: .1;
}

.workload-attention-map[data-filter="anchor"] .attention-flow { opacity: .08; }

.workload-attention-layout .legend-swatch.anchor { background: var(--matrix-anchor); }
.workload-attention-layout .legend-swatch.text-context {
  background: linear-gradient(90deg, var(--matrix-text-soft), var(--matrix-text));
}
.workload-attention-layout .legend-swatch.audio-context {
  background: linear-gradient(90deg, var(--matrix-audio-soft), var(--matrix-audio));
}

.workload-attention-layout .legend-swatch.workload-split {
  background: linear-gradient(90deg, var(--matrix-text) 0 18%, var(--matrix-audio) 18% 34%, var(--coral) 34% 54%, var(--matrix-anchor) 54% 68%, var(--blue) 68% 100%);
}

.workload-palette-presets {
  display: flex;
  justify-content: flex-end;
  gap: 22px;
  padding: 10px 22px;
  border-bottom: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--paper) 84%, var(--code-bg));
}

.workload-palette-presets fieldset {
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.workload-palette-presets legend {
  float: left;
  margin-right: 3px;
  color: var(--muted);
  font-family: var(--sans);
  font-size: .62rem;
  font-weight: 650;
}

.palette-preset {
  position: relative;
  display: grid;
  width: 25px;
  height: 25px;
  place-items: center;
  cursor: pointer;
}

.palette-preset input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.palette-preset > span[aria-hidden="true"] {
  width: 18px;
  height: 18px;
  border: 1px solid color-mix(in srgb, var(--ink) 28%, var(--line));
  border-radius: 50%;
  background: var(--preset-color);
  box-shadow: 0 0 0 0 var(--paper), 0 0 0 0 var(--ink);
  transition: transform .12s ease, box-shadow .12s ease;
}

.palette-preset:hover > span[aria-hidden="true"] { transform: scale(1.12); }

.palette-preset input:checked + span[aria-hidden="true"] {
  box-shadow: 0 0 0 2px var(--paper), 0 0 0 3px var(--ink);
  transform: scale(.92);
}

.palette-preset input:focus-visible + span[aria-hidden="true"] {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.workload-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(150px, .22fr);
  grid-template-rows: auto auto auto;
  column-gap: 14px;
  padding: clamp(22px, 3.8vw, 38px);
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.workload-video-head {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .075em;
  line-height: 1.2;
  text-transform: uppercase;
}

.workload-video-head strong {
  color: var(--ink);
  font-size: .63rem;
  font-weight: 600;
  letter-spacing: .04em;
}

.workload-grid {
  grid-column: 1;
  grid-row: 2;
  display: grid;
  grid-template-columns: repeat(34, minmax(0, 1fr));
  gap: var(--workload-gap);
  padding: 4px;
  border: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--line-soft) 56%, var(--paper));
}

.workload-cell {
  position: relative;
  aspect-ratio: 1;
  min-width: 0;
  border: 0;
  border-radius: 2px;
  background: var(--blue-soft);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--blue) 28%, transparent);
  cursor: default;
  transition: transform .14s ease, box-shadow .14s ease, filter .14s ease;
}

.workload-cell.is-linear { background: var(--blue); }
.workload-cell.is-softmax { background: var(--coral); }

.workload-cell:hover,
.workload-cell:focus-visible {
  z-index: 3;
  outline: none;
  transform: scale(1.18);
  box-shadow: 0 4px 12px rgba(30, 27, 21, .18), inset 0 0 0 1px rgba(255, 255, 255, .48);
  filter: saturate(1.08) brightness(1.06);
}

.workload-cell.is-query {
  z-index: 2;
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.workload-cell.is-query::after {
  content: "q";
  position: absolute;
  inset: 50% auto auto 50%;
  color: #fff;
  font-family: var(--serif);
  font-size: clamp(7px, .55vw, 11px);
  font-style: italic;
  font-weight: 500;
  line-height: 1;
  transform: translate(-50%, -48%);
}

.workload-cell.is-sink::after {
  content: "s";
  position: absolute;
  inset: 50% auto auto 50%;
  color: rgba(255, 255, 255, .92);
  font-family: var(--mono);
  font-size: clamp(6px, .46vw, 9px);
  font-weight: 700;
  line-height: 1;
  text-transform: uppercase;
  transform: translate(-50%, -47%);
}

.workload-cell[data-frame]::before {
  content: attr(data-frame);
  position: absolute;
  top: -16px;
  left: 50%;
  z-index: 4;
  padding: 1px 4px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--mono);
  font-size: .45rem;
  font-weight: 600;
  line-height: 1.25;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 3px);
  transition: opacity .12s ease, transform .12s ease;
  white-space: nowrap;
}

.workload-cell[data-frame]:hover::before,
.workload-cell[data-frame]:focus-visible::before {
  opacity: 1;
  transform: translate(-50%, 0);
}

.workload-modalities {
  grid-column: 2;
  grid-row: 1 / 3;
  display: grid;
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 4px;
  min-width: 0;
}

.workload-modality {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 3px;
  min-height: 0;
  padding: 7px 11px;
  border: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
  border-radius: 3px;
  color: #fff;
}

.workload-modality.is-softmax { background: var(--coral); }
.workload-modality.is-both {
  background: linear-gradient(105deg, var(--coral) 0 48%, var(--blue) 52% 100%);
}

.workload-modality strong {
  font-family: var(--serif);
  font-size: .88rem;
  font-weight: 500;
  line-height: 1;
}

.workload-modality span {
  font-family: var(--mono);
  font-size: .48rem;
  font-weight: 600;
  letter-spacing: .04em;
  opacity: .9;
  text-transform: uppercase;
}

.workload-legend {
  grid-column: 1 / -1;
  grid-row: 3;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  margin-top: 14px;
  color: var(--muted);
  font-size: .63rem;
  line-height: 1.2;
}

.workload-legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.workload-legend i {
  width: 13px;
  height: 13px;
  border-radius: 2px;
  box-shadow: inset 0 0 0 1px rgba(28, 27, 24, .12);
}

.workload-legend i.is-softmax { background: var(--coral); }
.workload-legend i.is-linear { background: var(--blue); }
.workload-legend i.is-both { background: linear-gradient(90deg, var(--coral) 0 50%, var(--blue) 50%); }
.workload-legend i.is-query { background: var(--paper); outline: 2px solid var(--ink); outline-offset: -2px; }

@media (max-width: 680px) {
  .workload-stage { display: block; padding: 20px 14px; }
  .workload-grid { grid-template-columns: repeat(17, minmax(0, 1fr)); gap: 3px; }
  .workload-modalities { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-rows: none; gap: 6px; margin-top: 12px; }
  .workload-modality { min-height: 48px; padding: 8px 11px; }
  .workload-legend { gap: 8px 14px; }
}

/* 16 × 16 query-key allocation map. */
.workload-matrix-stage {
  display: block;
  padding: clamp(20px, 3.4vw, 34px);
}

.workload-matrix-layout {
  display: grid;
  grid-template-columns: 22px minmax(0, 620px);
  grid-template-rows: minmax(0, auto) 22px;
  justify-content: center;
  gap: 8px 10px;
}

.workload-matrix-wrap {
  position: relative;
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
}

.workload-matrix {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--line-soft);
  cursor: default;
  image-rendering: auto;
}

.workload-axis {
  color: var(--muted);
  font-family: var(--mono);
  font-size: .54rem;
  font-weight: 600;
  letter-spacing: .06em;
  line-height: 1;
  text-transform: uppercase;
}

.workload-axis-y {
  grid-column: 1;
  grid-row: 1;
  align-self: center;
  justify-self: center;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.workload-axis-x {
  grid-column: 2;
  grid-row: 2;
  align-self: center;
  justify-self: center;
}

.workload-matrix-stage .workload-legend {
  display: flex;
  justify-content: center;
  margin-top: 13px;
}

.workload-matrix-stage .workload-legend i.is-softmax { background: var(--matrix-softmax); }
.workload-matrix-stage .workload-legend i.is-linear { background: var(--matrix-linear); }
.workload-matrix-stage .workload-legend i.is-both { background: var(--matrix-both); }
.workload-matrix-stage .workload-legend i.is-anchor { background: var(--matrix-anchor); }

@media (max-width: 680px) {
  .workload-palette-presets {
    justify-content: center;
    gap: 16px;
    padding: 9px 12px;
  }
  .workload-matrix-stage { padding: 18px 10px; }
  .workload-matrix-layout {
    grid-template-columns: 16px minmax(0, 1fr);
    grid-template-rows: minmax(0, auto) 20px;
    gap: 6px;
  }
  .workload-axis { font-size: .45rem; }
}

/* Directional-state sequence: local exact reads plus two directional linear states. */
.state-build-figure {
  --state-stage-height: clamp(240px, 26vw, 260px);
  --state-frame-half: 26px;
  --state-frame-bottom: calc(100% - 88px);
  --state-memory-top: calc(100% - 100px);
  --state-feed-bottom: 42px;
  --state-query-x: 50%;
  --state-readout-y: 50%;
}

.state-build-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 10px 20px;
  margin-bottom: 15px;
}

.state-build-head .viz-hint { margin-bottom: 2px; }

.article-content .state-progress {
  grid-column: 1 / -1;
  display: flex;
  width: 100%;
  margin: 1px 0 0;
  padding: 0;
  list-style: none;
}

.article-content .state-progress-step {
  --state-progress-notch: 11px;
  --state-progress-shape: polygon(
    0 0,
    calc(100% - var(--state-progress-notch)) 0,
    100% 50%,
    calc(100% - var(--state-progress-notch)) 100%,
    0 100%,
    var(--state-progress-notch) 50%
  );
  position: relative;
  isolation: isolate;
  display: grid;
  flex: 1 1 0;
  min-width: 0;
  height: 28px;
  margin: 0;
  place-items: center;
  color: var(--muted);
  font-size: .55rem;
  font-weight: 750;
  letter-spacing: .08em;
  line-height: 1;
  text-transform: uppercase;
  transition: color .28s ease, filter .28s ease;
}

.article-content .state-progress-step + .state-progress-step {
  margin-left: calc(var(--state-progress-notch) * -1);
}

.article-content .state-progress-step:first-child {
  --state-progress-shape: polygon(
    0 0,
    calc(100% - var(--state-progress-notch)) 0,
    100% 50%,
    calc(100% - var(--state-progress-notch)) 100%,
    0 100%
  );
}

.state-progress-step::before,
.state-progress-step::after {
  position: absolute;
  clip-path: var(--state-progress-shape);
  content: "";
  transition: background .28s ease;
}

.state-progress-step::before {
  z-index: -2;
  inset: 0;
  background: color-mix(in srgb, var(--line) 72%, var(--muted));
}

.state-progress-step::after {
  z-index: -1;
  inset: 1px;
  background: var(--paper);
}

.state-progress-step span { position: relative; z-index: 1; }

.state-progress-button {
  display: grid;
  width: 100%;
  height: 100%;
  padding: 0 var(--state-progress-notch);
  place-items: center;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
  letter-spacing: inherit;
  line-height: inherit;
  text-transform: inherit;
}

.state-progress-button:focus-visible {
  clip-path: var(--state-progress-shape);
  outline: 2px solid var(--coral);
  outline-offset: -3px;
}

.state-progress-step:not(.is-reached):has(.state-progress-button:hover)::after,
.state-progress-step:not(.is-reached):has(.state-progress-button:focus-visible)::after {
  background: color-mix(in srgb, var(--accent-soft) 56%, var(--paper));
}

.article-content .state-progress-step:has(.state-progress-button:hover) {
  filter: drop-shadow(0 4px 8px color-mix(in srgb, var(--accent) 20%, transparent));
}

.article-content .state-progress-step.is-reached {
  color: var(--paper);
}

.state-progress-step.is-reached::after { background: var(--accent); }

.article-content .state-progress-step.is-current {
  filter: drop-shadow(0 4px 8px color-mix(in srgb, var(--accent) 24%, transparent));
}

.state-progress-step.is-current::after {
  background: color-mix(in srgb, var(--accent) 82%, var(--ink));
}

.state-build-stage {
  position: relative;
  width: 100%;
  height: var(--state-stage-height);
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--blue-soft) 18%, transparent), transparent 43%),
    var(--paper);
  isolation: isolate;
}

.state-build-stage::before {
  position: absolute;
  top: 58px;
  right: 4%;
  left: 4%;
  height: 1px;
  background: var(--line);
  content: "";
  transition: opacity .36s ease;
}

.state-build-stage::after {
  position: absolute;
  z-index: -1;
  bottom: 16px;
  left: 50%;
  width: 46%;
  height: 112px;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(63, 126, 147, .08), transparent 70%);
  content: "";
  transform: translateX(-50%);
}

.state-lane-label {
  position: absolute;
  left: 19px;
  color: var(--muted);
  font-size: .61rem;
  font-weight: 700;
  letter-spacing: .1em;
  line-height: 1;
  text-transform: uppercase;
  transition: opacity .36s ease;
}

.state-lane-label-frames { top: 18px; }
.state-lane-label-memory { top: calc(var(--state-memory-top) - 24px); }

.state-frame {
  position: absolute;
  z-index: 3;
  bottom: var(--state-frame-bottom);
  left: var(--x);
  display: grid;
  width: clamp(28px, 6.2%, 52px);
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--line) 82%, var(--ink));
  border-radius: 7px;
  background: #eeeae3;
  box-shadow: 0 4px 12px rgba(32, 28, 20, .035);
  color: var(--muted);
  font-family: var(--mono);
  font-size: clamp(.57rem, 1vw, .72rem);
  font-style: normal;
  transform: translateX(-50%);
  transition:
    left .68s cubic-bezier(.2, .78, .2, 1),
    bottom .68s cubic-bezier(.2, .78, .2, 1),
    opacity .32s ease,
    transform .68s cubic-bezier(.2, .78, .2, 1),
    border-color .28s ease,
    background .28s ease,
    box-shadow .28s ease;
}

.state-frame::before {
  position: absolute;
  inset: 5px;
  border-radius: 3px;
  background: rgba(255, 255, 255, .34);
  content: "";
}

.state-frame span { position: relative; z-index: 1; }

.state-frame.is-selected,
.state-frame.is-selected.is-local {
  border-color: var(--coral);
  background: var(--coral-soft);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--coral-soft) 72%, transparent), 0 9px 22px rgba(163, 62, 45, .12);
  color: var(--coral);
}

.state-frame.is-local {
  border-color: var(--coral);
  background: color-mix(in srgb, var(--coral-soft) 78%, var(--paper));
  color: var(--coral);
}

.state-frame.is-sink {
  border-color: var(--coral);
  background: color-mix(in srgb, var(--coral-soft) 48%, var(--paper));
  box-shadow: inset 0 0 0 2px var(--paper), 0 0 0 1px color-mix(in srgb, var(--coral) 34%, transparent);
  color: var(--coral);
}

.soft-probe {
  position: absolute;
  z-index: 4;
  bottom: var(--state-frame-bottom);
  left: 50%;
  width: clamp(28px, 6.2%, 52px);
  aspect-ratio: 1;
  border: 1.5px solid var(--coral);
  border-radius: 7px;
  background: color-mix(in srgb, var(--coral-soft) 54%, transparent);
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) scale(.72);
  transition:
    left .72s cubic-bezier(.16, .84, .23, 1),
    opacity .22s ease,
    transform .72s cubic-bezier(.16, .84, .23, 1);
}

.soft-probe.is-visible {
  opacity: .92;
  transform: translateX(-50%) scale(1);
}

.soft-probe-left.is-spread { left: 43.43%; }
.soft-probe-right.is-spread { left: 56.57%; }

.direction-state {
  position: absolute;
  z-index: 6;
  top: var(--state-memory-top);
  left: 5%;
  display: grid;
  width: clamp(48px, 6.5%, 56px);
  aspect-ratio: 1;
  place-items: center;
  align-content: center;
  border: 1.5px solid var(--blue);
  border-radius: 50%;
  background: var(--blue-soft);
  box-shadow: 0 8px 22px rgba(63, 126, 147, .14);
  color: #275f73;
  opacity: 0;
  transform: translateX(-50%) scale(.72);
  transition:
    left .62s cubic-bezier(.2, .78, .2, 1),
    opacity .24s ease,
    transform .5s cubic-bezier(.2, .78, .2, 1);
}

.direction-state-reverse {
  left: 95%;
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.direction-state strong {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 500;
  line-height: .9;
}

.direction-state sup,
.state-snapshot sup { font-family: var(--sans); font-size: .68em; }

.direction-state small {
  margin-top: 3px;
  font-size: .47rem;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1;
  text-transform: uppercase;
}

.direction-state.is-visible {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

.state-joined-memory {
  position: absolute;
  z-index: 9;
  top: var(--state-memory-top);
  left: var(--state-query-x);
  display: grid;
  width: clamp(48px, 6.5%, 56px);
  aspect-ratio: 1;
  place-items: center;
  border: 1.5px solid color-mix(in srgb, var(--blue) 46%, var(--accent));
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-soft), var(--accent-soft));
  box-shadow: 0 10px 28px color-mix(in srgb, var(--accent) 14%, transparent);
  color: color-mix(in srgb, var(--blue) 40%, var(--accent));
  opacity: 0;
  transform: translateX(-50%) scale(.42);
  transition: top .52s cubic-bezier(.2, .78, .2, 1), opacity .24s ease, transform .52s cubic-bezier(.2, .78, .2, 1);
}

.state-joined-memory strong {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1;
}

.state-joined-memory.is-visible {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

.state-build-stage.is-joining .direction-state {
  opacity: 1;
  transform: translateX(-50%) scale(.92);
  transition:
    left .82s cubic-bezier(.4, 0, .2, 1),
    opacity .24s ease,
    transform .6s cubic-bezier(.2, .78, .2, 1);
}

.state-build-stage.is-joining.has-joined-memory .direction-state {
  opacity: 0;
  transform: translateX(-50%) scale(.68);
}

.state-build-stage.is-joining .state-frame.is-aligning {
  bottom: var(--state-frame-bottom);
  transform: translateX(-50%) scale(.86);
}

.state-build-stage.is-joining .state-snapshot { opacity: 0; }

.state-frame.is-feeding {
  bottom: var(--state-feed-bottom);
  opacity: 0;
  transform: translateX(-50%) scale(.46);
}

.state-snapshot {
  position: absolute;
  z-index: 5;
  top: calc(var(--state-memory-top) + 6px);
  left: var(--x);
  display: grid;
  width: clamp(32px, 5.1%, 44px);
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--blue) 66%, var(--line));
  border-radius: 50%;
  background: color-mix(in srgb, var(--blue-soft) 75%, var(--paper));
  color: var(--blue);
  font-family: var(--serif);
  font-size: .7rem;
  font-style: normal;
  opacity: 0;
  transform: translateX(-50%) scale(.5);
  transition:
    left .72s cubic-bezier(.2, .78, .2, 1),
    top .72s cubic-bezier(.2, .78, .2, 1),
    opacity .32s ease,
    transform .72s cubic-bezier(.2, .78, .2, 1);
}

.state-snapshot-reverse {
  border-color: color-mix(in srgb, var(--accent) 68%, var(--line));
  background: color-mix(in srgb, var(--accent-soft) 75%, var(--paper));
  color: var(--accent);
}

.state-snapshot.is-visible {
  opacity: .32;
  transform: translateX(-50%) scale(1);
}

.state-snapshot.is-terminal {
  z-index: 7;
  opacity: 1;
  transform: translateX(-50%) scale(1.18);
}

.state-build-stage.is-aligning .state-snapshot.is-terminal { opacity: 0; }

.state-build-stage.is-aligning .state-snapshot.is-visible:not(.is-terminal) {
  opacity: .09;
}

.state-frame.is-aligning {
  bottom: var(--state-frame-bottom);
  box-shadow: 0 7px 20px rgba(163, 62, 45, .1);
  transform: translateX(-50%) scale(.86);
}

.state-merge-result {
  position: absolute;
  z-index: 10;
  top: var(--state-readout-y);
  left: var(--state-query-x);
  display: grid;
  width: min(330px, 72%);
  min-height: 88px;
  place-items: center;
  align-content: center;
  overflow: visible;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: linear-gradient(100deg, var(--blue-soft), var(--paper) 48%, var(--coral-soft));
  box-shadow: 0 18px 46px rgba(32, 28, 20, .13);
  opacity: 0;
  transform: translate(-50%, -50%) scale(.45);
  transition: opacity .38s ease .28s, transform .72s cubic-bezier(.16, .86, .2, 1) .18s;
}

.state-merge-result::before,
.state-merge-result::after {
  position: absolute;
  inset: -11px;
  border: 1px solid color-mix(in srgb, var(--accent) 33%, transparent);
  border-radius: inherit;
  content: "";
  opacity: 0;
}

.state-merge-result::after {
  inset: -22px;
  border-color: color-mix(in srgb, var(--coral) 18%, transparent);
}

.state-merge-result span {
  color: var(--muted);
  font-size: .57rem;
  font-weight: 700;
  letter-spacing: .1em;
  line-height: 1;
  text-transform: uppercase;
}

.state-merge-result strong {
  margin-top: 7px;
  font-family: var(--serif);
  font-size: clamp(1.05rem, 2vw, 1.4rem);
  font-weight: 500;
  line-height: 1;
}

.state-merge-result.is-visible {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.state-merge-result.is-visible::before { animation: state-merge-ring 1.25s ease-out .3s both; }
.state-merge-result.is-visible::after { animation: state-merge-ring 1.25s ease-out .48s both; }

.state-build-stage.is-merging .direction-state,
.state-build-stage.is-merging .state-frame.is-aligning,
.state-build-stage.is-merging .state-snapshot {
  left: var(--state-query-x);
  opacity: 0;
  transform: translateX(-50%) scale(.18);
}

.state-build-stage.is-merging .state-frame.is-aligning {
  bottom: calc(50% - var(--state-frame-half));
}

.state-build-stage.is-merging .state-joined-memory {
  top: var(--state-readout-y);
  opacity: 0;
  transform: translate(-50%, -50%) scale(.42);
}

.state-build-stage.is-merging::before,
.state-build-stage.is-merging .state-lane-label { opacity: .16; }

@keyframes state-merge-ring {
  0% { opacity: 0; transform: scale(.72); }
  35% { opacity: 1; }
  100% { opacity: 0; transform: scale(1.16); }
}

@media (max-width: 680px) {
  .state-build-figure {
    --state-stage-height: 230px;
    --state-frame-half: 14px;
    --state-frame-bottom: calc(100% - 78px);
    --state-memory-top: calc(100% - 88px);
    --state-feed-bottom: 38px;
    --state-readout-y: 50%;
  }
  .state-build-head { grid-template-columns: minmax(0, 1fr); gap: 7px; }
  .state-build-head .viz-hint,
  .article-content .state-progress { grid-column: 1; }
  .article-content .state-progress { margin-top: 3px; }
  .article-content .state-progress-step {
    --state-progress-notch: 6px;
    height: 24px;
    font-size: .5rem;
    letter-spacing: .025em;
  }
  .state-build-stage::before { top: 64px; }
  .state-lane-label { left: 12px; font-size: .53rem; }
  .state-lane-label-frames { top: 14px; }
  .state-frame,
  .soft-probe { border-radius: 5px; }
  .direction-state { min-height: 40px; }
  .direction-state small { display: none; }
  .state-merge-result { min-height: 76px; }
}

@media (prefers-reduced-motion: reduce) {
  .state-merge-result.is-visible::before,
  .state-merge-result.is-visible::after { animation: none; }
}


/* Figure 04: component latency and its measured internal decomposition. */
.latency-section-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}
.latency-section-heading { min-width: 0; }
.article-content .latency-section-head h2 { margin: 0; }
.article-content .latency-section-heading h3 { margin: 24px 0 0; }
.hardware-selector {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  margin-top: 12px;
}
.hardware-toggle {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  width: 154px;
  padding: 3px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--line-soft) 62%, var(--paper));
  box-shadow: inset 0 1px 2px rgba(28, 27, 24, .05);
}
.hardware-toggle-thumb {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 3px;
  width: calc(50% - 3px);
  transform: translateX(100%);
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 3px 10px rgba(10, 104, 99, .2);
  transition: transform 220ms cubic-bezier(.2, .75, .25, 1);
}
.hardware-toggle.is-h200 .hardware-toggle-thumb { transform: translateX(0); }
.hardware-toggle button {
  position: relative;
  z-index: 1;
  min-height: 32px;
  padding: 0 12px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--mono);
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .045em;
  transition: color 180ms ease;
}
.hardware-toggle button.is-active { color: var(--paper); }
.hardware-toggle button:focus-visible {
  border-radius: 999px;
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}
#latency [data-benchmark] { display: inline-block; }
#latency .latency-stat strong[data-benchmark] { display: block; }
#latency.is-refreshing [data-benchmark] {
  animation: hardware-value-refresh 440ms cubic-bezier(.2, .72, .25, 1) both;
}
#latency.is-refreshing [data-hardware-copy] {
  animation: hardware-copy-refresh 360ms ease-out both;
}
@keyframes hardware-value-refresh {
  0% { opacity: .08; transform: translateY(7px); filter: blur(1.5px); }
  58% { opacity: 1; transform: translateY(-1px); filter: blur(0); }
  100% { opacity: 1; transform: translateY(0); filter: blur(0); }
}
@keyframes hardware-copy-refresh {
  0% { opacity: .28; transform: translateY(3px); }
  100% { opacity: 1; transform: translateY(0); }
}
.latency-stage {
  padding: clamp(20px, 4vw, 38px);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}
.latency-context {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 34px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.latency-stat { min-width: 0; padding: 18px 20px 17px 0; }
.latency-stat + .latency-stat { padding-left: 20px; border-left: 1px solid var(--line); }
.latency-stat strong {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4vw, 2.65rem);
  font-weight: 400;
  letter-spacing: -.035em;
  line-height: 1;
}
.latency-stat span { display: block; margin-top: 7px; color: var(--muted); font-size: .72rem; line-height: 1.35; }
.latency-stat.is-result strong { color: var(--accent); }
.latency-component-key {
  display: flex;
  align-items: center;
  gap: 9px 18px;
  margin: 15px 0 0;
}
.latency-component-key span {
  position: relative;
  padding-left: 12px;
  color: var(--muted);
  font-size: .61rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.latency-component-key span::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 7px;
  height: 7px;
  transform: translateY(-50%);
  border-radius: 50%;
  background: var(--key-color);
  content: "";
}
.latency-component-key .is-attention { --key-color: var(--coral); }
.latency-component-key .is-ffn { --key-color: var(--blue); }
.latency-component-key .is-other { --key-color: var(--orange); }
.latency-ladder { display: grid; gap: 18px; }
.latency-row { min-width: 0; }
.latency-row-head {
  display: grid;
  grid-template-columns: minmax(118px, .72fr) minmax(0, 1.85fr) max-content;
  gap: 12px;
  align-items: baseline;
  margin-bottom: 7px;
}
.latency-row-head strong,
.latency-row-head b { color: var(--ink); font-size: .8rem; font-style: normal; font-weight: 700; line-height: 1.2; }
.latency-row-head > span { min-width: 0; color: var(--muted); font-size: .68rem; line-height: 1.35; }
.latency-row-head b { font-family: var(--mono); font-size: .74rem; font-variant-numeric: tabular-nums; text-align: right; }
.latency-row-head .latency-pair {
  display: grid;
  grid-template-columns: minmax(63px, max-content) 8px minmax(63px, max-content);
  gap: 4px;
  align-items: baseline;
  white-space: nowrap;
}
.latency-pair span { color: inherit; font: inherit; line-height: inherit; text-align: right; }
.latency-pair i { color: var(--line); font-style: normal; font-weight: 400; text-align: center; }
.latency-row.is-optimized .latency-row-head strong,
.latency-row.is-optimized .latency-row-head b { color: var(--blue); }
.latency-track {
  position: relative;
  width: 100%;
  height: 24px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 3px;
  background: color-mix(in srgb, var(--line-soft) 58%, var(--paper));
}
.latency-components {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: stretch;
}
.latency-component {
  flex: 0 0 var(--component-width);
  min-width: 0;
  overflow: hidden;
  padding: 0 7px;
  border: 0;
  border-radius: 0;
  color: var(--paper);
  cursor: help;
  text-align: left;
  transition: flex-basis 460ms cubic-bezier(.2, .72, .25, 1);
}
.latency-component + .latency-component { border-left: 1px solid rgba(255, 253, 248, .76); }
.latency-component span {
  display: block;
  overflow: hidden;
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .025em;
  line-height: 22px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.latency-component.is-attention { background: var(--coral); }
.latency-component.is-ffn { background: var(--blue); }
.latency-component.is-other { padding: 0; background: var(--orange); color: var(--ink); }
.latency-component.is-other span { display: none; }
.latency-component:focus-visible {
  z-index: 1;
  box-shadow: inset 0 0 0 2px var(--paper);
  outline: 0;
}
.latency-detail {
  min-height: 214px;
  margin-top: 18px;
  padding: 18px 0 2px;
  border-top: 1px solid var(--line);
}
.latency-detail-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 24px;
  margin-bottom: 12px;
}
.latency-detail-head > span {
  display: block;
  color: var(--accent);
  font-size: .56rem;
  font-weight: 700;
  letter-spacing: .07em;
  line-height: 1.2;
  text-transform: uppercase;
}
.latency-detail-head p {
  margin: 0 !important;
  color: var(--muted);
  font-size: .63rem;
  line-height: 1.4;
  text-align: right;
}
.latency-detail-grid {
  display: grid;
  gap: 12px;
  padding: 4px 0 2px;
}
.latency-detail-item {
  --detail-color: #758b7a;
  display: grid;
  grid-template-columns: minmax(180px, .95fr) minmax(180px, 2.15fr) clamp(180px, 14vw, 245px);
  gap: 16px;
  align-items: center;
  min-width: 0;
  min-height: 32px;
}
.latency-detail-item[data-detail-kind="softmax"] { --detail-color: #89a4a4; }
.latency-detail-item[data-detail-kind="linear"] { --detail-color: #8195b0; }
.latency-detail-item[data-detail-kind="projection"] { --detail-color: #a7a77c; }
.latency-detail-item[data-detail-kind="pointwise"] { --detail-color: #a88fa0; }
.latency-detail-item[data-detail-kind="overhead"] { --detail-color: #c19a72; }
.latency-detail-label { min-width: 0; }
.latency-detail-label span {
  display: block;
  overflow: hidden;
  color: var(--ink);
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .035em;
  line-height: 1.2;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}
.latency-detail-label strong {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .64rem;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.latency-detail-bar {
  position: relative;
  height: 18px;
  overflow: hidden;
  border-radius: 2px;
  background:
    linear-gradient(90deg, transparent calc(25% - .5px), rgba(28, 27, 24, .07) 25%, transparent calc(25% + .5px)),
    linear-gradient(90deg, transparent calc(50% - .5px), rgba(28, 27, 24, .07) 50%, transparent calc(50% + .5px)),
    linear-gradient(90deg, transparent calc(75% - .5px), rgba(28, 27, 24, .07) 75%, transparent calc(75% + .5px)),
    color-mix(in srgb, var(--line-soft) 55%, var(--paper));
}
.latency-detail-bar i {
  display: block;
  width: var(--detail-share);
  min-width: 3px;
  height: 100%;
  border-radius: inherit;
  background: var(--detail-color);
  box-shadow: inset 0 0 0 1px rgba(36, 42, 40, .05);
}
.latency-detail-item em {
  display: block;
  color: var(--detail-color);
  font-size: .57rem;
  font-style: normal;
  font-weight: 700;
  line-height: 1.25;
  text-align: right;
}

@media (max-width: 680px) {
  .latency-section-head { flex-direction: column; align-items: stretch; gap: 16px; margin-bottom: 20px; }
  .hardware-selector { align-self: flex-end; margin-top: 0; }
  .hardware-toggle { width: 132px; }
  .hardware-toggle button { min-height: 30px; padding: 0 9px; font-size: .59rem; }
  .latency-stage { padding: 20px 16px; }
  .latency-context { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-bottom: 28px; }
  .latency-stat { padding: 14px 12px 14px 0; }
  .latency-stat + .latency-stat { padding-left: 12px; border-left: 1px solid var(--line); }
  .latency-stat.is-result { grid-column: 1 / -1; padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
  .latency-row-head { grid-template-columns: minmax(0, 1fr) max-content; gap: 4px 12px; }
  .latency-row-head > span { grid-column: 1 / -1; grid-row: 2; }
  .latency-track { height: 20px; }
  .latency-component span { display: none; }
  .latency-detail { min-height: 318px; margin-top: 20px; padding-top: 15px; }
  .latency-detail-head { display: block; }
  .latency-detail-head p { margin-top: 5px !important; text-align: left; }
  .latency-detail-grid { gap: 14px; }
  .latency-detail-item {
    grid-template-columns: minmax(0, 1fr) minmax(80px, max-content);
    gap: 6px 12px;
  }
  .latency-detail-bar { grid-column: 1 / -1; grid-row: 2; height: 15px; }
  .latency-detail-item em { grid-column: 2; grid-row: 1; }
}

/* Figure 05: system-level gains appear only after parallelism and distillation. */
.system-speedup-stage {
  display: grid;
  gap: 22px;
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}
.system-speedup-row { min-width: 0; }
.system-speedup-head {
  display: grid;
  grid-template-columns: minmax(180px, .9fr) minmax(0, 1.45fr) max-content;
  gap: 14px;
  align-items: baseline;
  margin-bottom: 8px;
}
.system-speedup-head strong {
  color: var(--ink);
  font-size: .8rem;
  line-height: 1.2;
}
.system-speedup-head span {
  min-width: 0;
  color: var(--muted);
  font-size: .67rem;
  line-height: 1.3;
}
.system-speedup-head b {
  color: var(--ink);
  font-family: var(--mono);
  font-size: .76rem;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  text-align: right;
}
.system-speedup-row.is-parallel .system-speedup-head strong,
.system-speedup-row.is-parallel .system-speedup-head b { color: var(--blue); }
.system-speedup-row.is-ulysses .system-speedup-head strong,
.system-speedup-row.is-ulysses .system-speedup-head b { color: #687e86; }
.system-speedup-row.is-distilled .system-speedup-head strong,
.system-speedup-row.is-distilled .system-speedup-head b { color: var(--accent); }
.system-speedup-track {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  height: 26px;
  overflow: visible;
  border: 1px solid var(--line-soft);
  border-radius: 3px;
  background:
    linear-gradient(90deg, transparent calc(25% - .5px), rgba(28, 27, 24, .055) 25%, transparent calc(25% + .5px)),
    linear-gradient(90deg, transparent calc(50% - .5px), rgba(28, 27, 24, .055) 50%, transparent calc(50% + .5px)),
    linear-gradient(90deg, transparent calc(75% - .5px), rgba(28, 27, 24, .055) 75%, transparent calc(75% + .5px)),
    color-mix(in srgb, var(--line-soft) 55%, var(--paper));
}
.system-speedup-track i {
  display: block;
  width: var(--system-width);
  min-width: 7px;
  height: 100%;
  border-radius: 2px;
  background: var(--coral);
  transition: width 460ms cubic-bezier(.2, .72, .25, 1);
}
.system-speedup-row.is-parallel .system-speedup-track i { background: var(--blue); }
.system-speedup-row.is-ulysses .system-speedup-track i {
  background: color-mix(in srgb, var(--blue) 62%, var(--line));
}
.system-speedup-row.is-distilled .system-speedup-track i {
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-soft) 74%, transparent);
}
.system-speedup-track em {
  margin-left: 12px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .6rem;
  font-style: normal;
  font-weight: 700;
  letter-spacing: .035em;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}
.system-speedup-row.is-parallel .system-speedup-track em { color: var(--blue); }

@media (max-width: 680px) {
  .system-speedup-stage { gap: 20px; padding: 20px 16px; }
  .system-speedup-head { grid-template-columns: minmax(0, 1fr) max-content; gap: 4px 12px; }
  .system-speedup-head span { grid-column: 1 / -1; grid-row: 2; }
  .system-speedup-track { height: 21px; }
  .system-speedup-track em { margin-left: 10px; font-size: .53rem; }
}

@media (prefers-reduced-motion: reduce) {
  #latency.is-refreshing [data-benchmark],
  #latency.is-refreshing [data-hardware-copy] { animation: none; }
  .latency-component,
  .system-speedup-track i,
  .hardware-toggle-thumb { transition: none; }
}