/* Paper-like article layout (lmodern / Computer Modern) with a light docs accent for code */
:root {
  --text: #111;
  --muted: #444;
  --caption: #333;
  /* hyperref urlcolor ≈ blue!50!black, nudged toward docs teal */
  --link: #0a4f6e;
  --link-hover: #0e8fa3;
  --line: #c8c8c8;
  --rule: #222;
  --bg: #fff;
  --accent: #0e8fa3;          /* docs light accent */
  --accent-soft: #e8f4f7;     /* code / listing wash */
  --accent-line: #b7d7df;     /* code border */
  --code-fg: #0a3d4a;         /* inline / block code text */
  --code-bg: var(--accent-soft);
  --max: 42rem;
  --roman: "Computer Modern Serif", "Latin Modern Roman", "CMU Serif", "Times New Roman", Times, serif;
  --mono: "Computer Modern Typewriter", "Latin Modern Mono", "CMU Typewriter Text", "Courier New", monospace;
}

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

html {
  scroll-behavior: smooth;
  font-size: 11pt; /* report: \documentclass[11pt] */
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--roman);
  font-size: 1rem;
  line-height: 1.45;
  -webkit-font-smoothing: auto;
  text-rendering: optimizeLegibility;
}

.page {
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  padding: 2.25rem 0 2.5rem;
}

h1,
h2 {
  font-family: var(--roman);
  font-weight: 700;
  color: var(--text);
  line-height: 1.25;
}

h1 {
  margin: 0;
  font-size: 1.7rem; /* \LARGE */
  text-align: center;
}

h2 {
  /* \large\bfseries section */
  margin: 1.6rem 0 0.55rem;
  font-size: 1.15rem;
  padding-bottom: 0.2rem;
  border-bottom: 1.5pt solid color-mix(in srgb, var(--accent) 35%, var(--line));
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.hero {
  text-align: center;
  margin-bottom: 1.1rem;
}

.subtitle {
  margin: 0.45rem 0 0.85rem;
  font-size: 1.15rem; /* \large */
  font-weight: 400;
}

.authors {
  margin: 0.85rem 0 0.35rem;
  font-size: 1rem;
  line-height: 1.55;
}

.authors span {
  white-space: nowrap;
}

.authors sup {
  font-size: 0.65em;
}

.affils {
  margin: 0 0 0.95rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.affils span {
  white-space: nowrap;
}

.affils sup {
  margin-right: 0.12rem;
}

.links {
  margin: 0.75rem 0 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.2rem 0.7rem;
  font-size: 1rem;
}

.links a {
  font-weight: 700;
}

.teaser {
  margin: 1.35rem 0 0.35rem;
}

.teaser__frame {
  overflow: hidden;
  background: #0b0f14;
  border: 0.4pt solid var(--line);
  line-height: 0;
}

.teaser video {
  display: block;
  width: 100%;
  height: auto;
  pointer-events: none;
}

.teaser figcaption {
  margin-top: 0.4rem;
  color: var(--caption);
  font-size: 0.85rem;
  text-align: center;
  line-height: 1.35;
}

section p {
  margin: 0 0 0.75rem;
  text-align: justify;
  hyphens: auto;
}

.para {
  margin: 0 0 0.65rem;
}

.para strong {
  font-weight: 700;
}

.tech-note {
  margin-bottom: 0.85rem;
}

.tech-note .para {
  margin-bottom: 0.35rem;
}

.eq {
  margin: 0.35rem 0 0.55rem !important;
  text-align: center !important;
  overflow-x: auto;
}

.eq .katex-display {
  margin: 0.4rem 0;
}

.qs {
  margin: 0.35rem 0 0.75rem;
  padding-left: 1.25rem;
}

.qs li + li {
  margin-top: 0.7rem;
}

.qs__title {
  margin: 0 0 0.35rem !important;
  text-align: left !important;
  hyphens: manual;
}

.listing {
  margin: 0.2rem 0 0;
  padding: 0.5rem 0.65rem 0.5rem 0.75rem;
  overflow-x: auto;
  background: var(--code-bg);
  border: 0.4pt solid var(--accent-line);
  border-left: 2.5pt solid var(--accent);
  font-size: 0.78rem;
  line-height: 1.4;
}

.listing code {
  font-family: var(--mono);
  color: var(--code-fg);
  white-space: pre;
}

.muted {
  color: var(--muted);
  font-size: 0.92rem;
  text-align: left !important;
}

.demo__controls {
  margin: 0.55rem 0 1rem;
  padding: 0.55rem 0.9rem 0.75rem;
  border: 0.4pt solid var(--accent-line);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--code-fg);
  font-size: 0.88rem;
  line-height: 1.45;
}
.demo__controls > summary {
  cursor: pointer;
  list-style: none;
  margin: 0;
  padding: 0.15rem 0 0.15rem 0;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.45rem;
}
.demo__controls > summary::-webkit-details-marker {
  display: none;
}
.demo__controls > summary::after {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform 120ms ease;
  flex: 0 0 auto;
}
.demo__controls[open] > summary::after {
  transform: rotate(-135deg);
}
.demo__controls[open] > summary {
  margin-bottom: 0.55rem;
}
.demo__controls-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.demo__controls-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}
.demo__controls-list li + li {
  margin-top: 0.45rem;
}
.demo__btns {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  min-width: 5.4rem;
}
.demo__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  border: 0.4pt solid var(--accent-line);
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 1px 0 color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
}
.demo__btn svg {
  width: 0.95rem;
  height: 0.95rem;
  display: block;
}
.demo__btn--key {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--code-fg);
}

.demo {
  position: relative;
  border: 0.4pt solid var(--line);
  background: #0f1216;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  margin-bottom: 0.25rem;
}

.demo__load {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 0;
  border: 0;
  background: #0f1216;
  cursor: pointer;
  color: #fff;
  font-family: var(--roman);
  font-size: 0.95rem;
}

.demo__load img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.demo__load span {
  position: relative;
  z-index: 1;
  padding: 0.5rem 0.85rem;
  background: rgba(0, 0, 0, 0.78);
  border: 0.4pt solid rgba(255, 255, 255, 0.35);
}

.demo__load:hover span {
  background: rgba(0, 0, 0, 0.9);
}

.demo__frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #0f1216;
}

.demo.is-loaded .demo__load {
  display: none;
}

.para code,
.muted code {
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--code-fg);
  background: var(--accent-soft);
  padding: 0.05em 0.3em;
  border: 0.4pt solid var(--accent-line);
}

.repos {
  margin: 0.15rem 0 0;
  padding-left: 1.25rem;
}

.repos li {
  margin: 0.2rem 0;
  text-align: left;
}

.repos code {
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--code-fg);
  background: var(--accent-soft);
  padding: 0.05em 0.3em;
  border: 0.4pt solid var(--accent-line);
}

.related {
  margin: 0;
  line-height: 1.7;
  text-align: left !important;
}

.bib-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
}

.bib-head h2 {
  margin-top: 1.6rem;
}

.copy {
  border: 0.4pt solid var(--accent-line);
  background: var(--accent-soft);
  padding: 0.15rem 0.5rem;
  font-family: var(--roman);
  font-size: 0.78rem;
  cursor: pointer;
  color: var(--link);
}

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

pre {
  margin: 0.35rem 0 0;
  padding: 0.65rem 0.75rem;
  overflow-x: auto;
  background: var(--code-bg);
  border: 0.4pt solid var(--accent-line);
  border-left: 2.5pt solid var(--accent);
  font-size: 0.78rem;
  line-height: 1.4;
}

pre code {
  font-family: var(--mono);
  color: var(--code-fg);
  white-space: pre;
}

footer {
  margin-top: 2rem;
  padding-top: 0.45rem;
  border-top: 0.4pt solid var(--rule);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

@media (max-width: 560px) {
  html {
    font-size: 10.5pt;
  }

  .page {
    width: min(100% - 1.25rem, var(--max));
  }

  .demo {
    aspect-ratio: 3 / 4;
  }

  .authors span,
  .affils span {
    white-space: normal;
  }

  section p {
    text-align: left;
    hyphens: manual;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}