:root {
  --bg-page: #ffffff;
  --text-primary: #171717;
  --text-secondary: #424242;
  --text-muted: #666666;
  --accent: #2563eb;
  --border-light: #e5e7eb;
  --one-step-leap: #4f71be;
  --latent-connector: #e18341;
  --reward-gradient: #68349b;
  --font-serif: "Bitstream Charter", "Charter", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100%;
  margin: 0;
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-serif);
}

.page-shell {
  min-height: 100%;
}

.toc-container {
  position: fixed;
  top: 120px;
  left: 24px;
  z-index: 100;
  width: 150px;
  max-height: calc(100vh - 140px);
  overflow-y: auto;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  line-height: 1.5;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.toc-container h4 {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.toc-container ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc-container li {
  margin-bottom: 0.5rem;
}

.toc-container a {
  display: block;
  padding: 2px 0;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.toc-container a:hover {
  color: var(--accent);
}

@media (max-width: 1380px) and (min-width: 681px) {
  .toc-container {
    left: 0;
    width: 170px;
    padding: 12px 52px 12px 14px;
    border: 1px solid var(--border-light);
    border-left: 0;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    overflow: visible;
    transform: translateX(calc(-100% + 42px));
  }

  .toc-container:hover,
  .toc-container:focus-within {
    transform: translateX(0);
  }

  .toc-container::after {
    content: "Contents";
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    border-left: 1px solid var(--border-light);
    color: var(--text-muted);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    writing-mode: vertical-rl;
  }
}

.paper-header {
  position: relative;
  max-width: none;
  margin: 0;
  padding: 72px 20px 48px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.36), rgba(255, 255, 255, 0.24)),
    url("../../assets/banner-crop.webp") center / cover no-repeat;
  border-bottom: 1px solid #eef0f2;
  text-align: center;
}

.title-section,
.authors,
.tldr-section,
.button-row {
  position: relative;
  z-index: 1;
  width: min(980px, 100%);
  margin-left: auto;
  margin-right: auto;
}

.title-section h1 {
  margin: 0;
  line-height: 1.3;
  text-wrap: balance;
  color: var(--text-primary);
  font-size: 2.2rem;
  font-weight: 700;
}

.authors {
  margin-top: 20px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1.22rem;
  line-height: 1.65;
  text-shadow:
    0 1px 2px rgba(255, 255, 255, 0.96),
    0 0 8px rgba(255, 255, 255, 0.82);
}

.authors a,
.authors span {
  white-space: nowrap;
}

.authors a {
  color: #1d4ed8;
  font-weight: 600;
  text-decoration: none;
}

.authors a:hover {
  text-decoration: underline;
}

.authors sup {
  margin-left: 1px;
  color: var(--text-muted);
  font-size: 0.65em;
}

.author-separator::before {
  content: "";
  display: inline-block;
  width: 0.42em;
}

.affiliations,
.author-note {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.affiliations {
  margin-top: 12px;
}

.author-note {
  margin-top: 4px;
  font-style: italic;
}

.affiliation-separator::before,
.note-separator::before {
  content: "";
  display: inline-block;
  width: 1.2em;
}

.tldr-section {
  max-width: 800px;
  margin: 28px auto 0;
  padding: 15px 20px;
  border-left: 4px solid var(--accent);
  background: #f8f9fa;
  text-align: left;
}

.standalone-tldr {
  margin-top: 28px;
}

.tldr-section p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

.tldr-label {
  margin-right: 6px;
  color: var(--text-primary);
  font-weight: 700;
}

.teaser-section {
  --teaser-tile-size: clamp(180px, 42vw, 240px);
  --teaser-gap: 16px;
  width: min(760px, calc(100% - 40px));
  margin: 32px auto 0;
}

.teaser-figure {
  margin: 0;
}

.teaser-marquee {
  width: 100%;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 26px, #000 calc(100% - 26px), transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 26px, #000 calc(100% - 26px), transparent 100%);
}

.teaser-track {
  display: flex;
  width: max-content;
  animation: teaser-slide 28s linear infinite;
  will-change: transform;
}

.teaser-sequence {
  display: flex;
  flex: 0 0 auto;
  gap: var(--teaser-gap);
  padding-right: var(--teaser-gap);
}

.teaser-sequence img {
  flex: 0 0 auto;
  display: block;
  width: var(--teaser-tile-size);
  height: var(--teaser-tile-size);
  max-width: none;
  object-fit: cover;
}

.teaser-marquee:hover .teaser-track,
.teaser-marquee:focus-within .teaser-track {
  animation-play-state: paused;
}

@keyframes teaser-slide {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-50%);
  }
}

.teaser-figure figcaption {
  max-width: 760px;
  margin: 10px auto 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  text-align: center;
}

.button-row {
  display: flex;
  justify-content: center;
  gap: 10px;
  max-width: 800px;
  margin: 25px auto 0;
  flex-wrap: wrap;
}

.button-row a {
  position: relative;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: #fef3cd;
  color: var(--text-primary);
  border: 1.5px solid #dfc36a;
  border-radius: 50px;
  padding: 8px 18px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.button-row a:hover {
  background-color: #fce8a6;
  border-color: #c9a84a;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12);
}

.button-row .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1em;
  height: 1em;
  margin-bottom: 0;
}

.button-row .icon svg,
.button-row .icon i,
.button-row .icon img {
  display: block;
  width: 1em;
  height: 1em;
}

.content-section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 44px 20px 0;
}

.content-section h2 {
  max-width: 760px;
  margin: 0 auto 18px;
  color: var(--text-primary);
  font-size: 1.8rem;
  line-height: 1.3;
}

.content-section p {
  max-width: 760px;
  margin: 0 auto 18px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.75;
  hyphens: auto;
  text-align: justify;
  text-justify: inter-word;
}

.contribution-intro {
  margin-bottom: 8px;
}

.contribution-list {
  max-width: 760px;
  margin: 0 auto;
  padding-left: 1.2rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.contribution-list li {
  margin-bottom: 12px;
  hyphens: auto;
  text-align: justify;
  text-justify: inter-word;
}

.method-section > h2,
.method-copy,
.method-figure figcaption {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.method-figure {
  margin: 12px 0 28px;
}

.method-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.method-figure figcaption {
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.55;
  text-align: center;
}

.method-figure figcaption strong {
  color: var(--text-secondary);
}

.method-copy h3 {
  margin: 30px 0 10px;
  color: var(--text-primary);
  font-size: 1.22rem;
  line-height: 1.35;
}

.method-copy h3:first-child {
  margin-top: 0;
}

.method-copy p {
  margin: 0 0 16px;
  max-width: none;
}

.gradient-color {
  color: var(--reward-gradient);
  font-weight: 600;
}

.one-step-color {
  color: var(--one-step-leap);
  font-weight: 600;
}

.latent-connector-color {
  color: var(--latent-connector);
  font-weight: 600;
}

.latex-display {
  margin: 18px 0 20px;
  overflow-x: auto;
  overflow-y: hidden;
  color: var(--text-primary);
}

.latex-display mjx-container {
  margin: 0 !important;
  padding: 4px 0;
}

.trajectory-display mjx-container {
  font-size: 112% !important;
}

.content-section a {
  color: var(--accent);
  text-decoration: none;
}

.content-section a:hover {
  text-decoration: underline;
}

.content-section sup.citation {
  margin-left: 1px;
  font-size: 0.72em;
  line-height: 0;
  white-space: nowrap;
}

.results-copy {
  max-width: 760px;
  margin: 0 auto;
}

.results-copy h3 {
  margin: 0 0 10px;
  color: var(--text-primary);
  font-size: 1.22rem;
  line-height: 1.35;
}

.subsection-copy {
  margin-top: 42px;
}

.results-copy .table-caption-text {
  margin-bottom: 14px;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.5;
  text-align: left;
}

.mixgrpo-note {
  display: block;
  margin-top: 4px;
}

.table-wrap {
  width: 94%;
  max-width: 940px;
  margin: 12px auto 18px;
  overflow-x: hidden;
}

.compact-table-wrap {
  max-width: 940px;
}

.results-table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  border-top: 2px solid var(--text-primary);
  border-bottom: 2px solid var(--text-primary);
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: 0.9rem;
  line-height: 1.25;
  text-align: center;
  font-variant-numeric: tabular-nums;
  margin: 0 auto;
}

.results-table .method-col {
  width: 15%;
}

.results-table .score-col {
  width: 12%;
}

.results-table .wide-score-col {
  width: 17%;
}

.results-table .quality-col {
  width: 18%;
}

.results-table .image-reward-col {
  width: 14%;
}

.geneval-table .method-col {
  width: 14%;
}

.geneval-table .geneval-overall-col {
  width: 10%;
}

.geneval-table .geneval-small-col {
  width: 10%;
}

.geneval-table .geneval-medium-col {
  width: 13%;
}

.geneval-table .geneval-wide-col {
  width: 20%;
}

.results-table th,
.results-table td {
  padding: 7px 5px;
  vertical-align: middle;
}

.results-table thead th {
  font-weight: 600;
  white-space: normal;
  overflow-wrap: normal;
  word-break: normal;
}

.results-table thead tr:first-child th {
  padding-top: 8px;
  padding-bottom: 5px;
  border-bottom: 1px solid #b7b7b7;
}

.results-table thead tr:last-child th {
  border-bottom: 1.5px solid var(--text-primary);
}

.results-table .metric-with-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
}

.results-table .metric-label {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  line-height: 1.25;
  white-space: nowrap;
}

.results-table .metric-label span {
  display: block;
  white-space: nowrap;
}

.results-table .metric-arrow {
  display: inline-block;
  flex: 0 0 auto;
  line-height: 1;
}

.results-table .method-head {
  vertical-align: bottom;
  text-align: left;
}

.results-table .domain-head {
  color: var(--text-secondary);
  font-style: italic;
}

.results-table .in-domain-head,
.results-table .out-domain-head {
  border-left: 1px solid #cfcfcf;
}

.results-table .metric-in-domain {
  border-left: 1px solid #cfcfcf;
}

.results-table .metric-out-domain-start {
  border-left: 1px solid #cfcfcf;
}

.results-table tbody th {
  text-align: left;
  font-weight: 500;
  white-space: nowrap;
  padding-right: 8px;
}

.results-table tbody td {
  white-space: nowrap;
}

.results-table tbody tr:not(.table-group):not(.ours-row) {
  border-bottom: 1px solid #eeeeee;
}

.results-table .table-group td {
  padding: 7px 4px;
  border-top: 1.5px solid var(--text-primary);
  border-bottom: 1.5px solid var(--text-primary);
  background: #fafafa;
  color: var(--text-secondary);
  font-style: italic;
  text-align: center;
}

.results-table .ours-row {
  background: #f1f4ff;
}

.results-table .ours-row th,
.results-table .ours-row td {
  border-top: 1.5px solid var(--text-primary);
}

.results-table .ours-row th {
  font-weight: 700;
}

.results-table u {
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
}

.plot-row {
  display: flex;
  gap: 22px;
  width: 94%;
  max-width: 940px;
  margin: 24px auto 18px;
  align-items: stretch;
}

.result-figure,
.qualitative-figure,
.hpsv3-gallery-figure {
  margin: 0;
}

.result-figure {
  display: flex;
  flex-direction: column;
  flex: 1 1 0;
}

.result-figure img {
  display: block;
  width: 100%;
  height: 310px;
  object-fit: contain;
  object-position: center bottom;
}

.qualitative-figure img,
.hpsv3-gallery-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.result-figure figcaption,
.qualitative-figure figcaption,
.hpsv3-gallery-figure figcaption {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.5;
  text-align: left;
}

.qualitative-figure figcaption,
.hpsv3-gallery-figure figcaption {
  text-align: center;
}

.qualitative-figure {
  width: 90%;
  max-width: 850px;
  margin: 24px auto 0;
}

.hpsv3-gallery-figure {
  width: 94%;
  max-width: 920px;
  margin: 24px auto 0;
}

.bibtex-box {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
}

.copy-button {
  position: absolute;
  top: 6px;
  right: 8px;
  z-index: 1;
  border: 0;
  border-radius: 5px;
  padding: 4px 9px;
  background: var(--accent);
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.18s ease;
}

.copy-button:hover {
  background: #1d4ed8;
}

.bibtex-section pre {
  min-height: 74px;
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--border-light);
  background: #f8f9fa;
  overflow-x: auto;
  color: var(--text-secondary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.86rem;
  line-height: 1.5;
  white-space: pre;
}

.references-section {
  padding-bottom: 56px;
}

.references-section h2 {
  font-size: 1.35rem;
}

.references-section p {
  padding-left: 28px;
  color: #444444;
  font-size: 0.9rem;
  line-height: 1.6;
  text-align: left;
  text-indent: -28px;
}

@media (max-width: 680px) {
  .toc-container {
    display: none;
  }

  .paper-header {
    padding: 48px 18px 36px;
  }

  .title-section h1 {
    font-size: 1.6rem;
  }

  .authors {
    font-size: 1rem;
  }

  .tldr-section {
    margin-top: 24px;
    padding: 14px 16px;
  }

  .button-row {
    margin-top: 20px;
  }

  .content-section {
    padding-top: 36px;
  }

  .content-section h2 {
    font-size: 1.45rem;
  }

  .table-wrap,
  .plot-row,
  .qualitative-figure {
    width: 100%;
  }

  .table-wrap {
    overflow-x: auto;
  }

  .results-table {
    min-width: 820px;
  }

  .plot-row {
    flex-direction: column;
    gap: 18px;
  }

  .latex-display mjx-container {
    font-size: 90% !important;
  }

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

  .author-separator::before {
    width: 0.22em;
  }

  .affiliation-separator,
  .note-separator {
    display: block;
    height: 4px;
  }
}