/* Index article pattern: TOC left, flowing content */

:root {
  --bg: #ffffff;
  --bg-subtle: #fafafa;
  --bg-warm: #fafbfc;
  --text: #0a0a0a;
  --text-secondary: #737373;
  --border: #e5e5e5;
  --border-light: #f0f0f0;
  --link: #0a0a0a;
  --link-underline: #a3a3a3;
  /* Single accent for hierarchy and focus—used sparingly */
  --accent: #4f46e5;
  --accent-muted: rgba(79, 70, 229, 0.08);
  --accent-border: rgba(79, 70, 229, 0.25);

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Lora", Georgia, "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;
  --content-width: 880px;
  --toc-width: 200px;
  --layout-gap: 1.5rem;
  --layout-width: calc(var(--toc-width) + var(--content-width) + var(--layout-gap));
  --header-height: 56px;
}

/* Dark theme */
[data-theme="dark"] {
  --bg: #111111;
  --bg-subtle: #1a1a1a;
  --bg-warm: #151515;
  --text: #f5f5f5;
  --text-secondary: #a3a3a3;
  --border: #2a2a2a;
  --border-light: #333333;
  --link: #f5f5f5;
  --link-underline: #525252;
  --accent: #818cf8;
  --accent-muted: rgba(129, 140, 248, 0.15);
  --accent-border: rgba(129, 140, 248, 0.45);
  --hover-bg: rgba(255, 255, 255, 0.06);
  --code-bg: #1e1e1e;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-sticky: 2px 0 4px -2px rgba(0, 0, 0, 0.35);
  --tr-hover: rgba(255, 255, 255, 0.04);
  --tr-even: rgba(255, 255, 255, 0.02);
  --tr-even-hover: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .home {
  --home-text: #f5f5f5;
  --home-muted: #a3a3a3;
  --home-border: #2a2a2a;
  --home-bg: #111111;
  --home-bg-subtle: #1a1a1a;
}


* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-warm) 12rem, var(--bg) 100%);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Site header: minimal bar */
.site-header {
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  max-width: var(--layout-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 1rem;
  line-height: 1.5;
}

.toc-toggle {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin: 0 -4px 0 0;
  padding: 0;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease;
}

.toc-toggle:hover {
  color: var(--text);
  background: var(--hover-bg, rgba(0, 0, 0, 0.06));
}

.toc-toggle[aria-expanded="false"] {
  color: var(--text);
}

.toc-toggle__icon {
  display: block;
}

.site-header__logo {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-header__logo:hover {
  text-decoration: underline;
}

/* Theme toggle */
.theme-toggle {
  margin-left: auto;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease;
}
.theme-toggle:hover {
  color: var(--text);
  background: var(--hover-bg, rgba(0, 0, 0, 0.06));
}
.theme-toggle__icon {
  display: block;
}
.theme-toggle .theme-toggle__icon--sun {
  display: none;
}
.theme-toggle .theme-toggle__icon--moon {
  display: block;
}
[data-theme="dark"] .theme-toggle .theme-toggle__icon--sun {
  display: block;
}
[data-theme="dark"] .theme-toggle .theme-toggle__icon--moon {
  display: none;
}

/* Page layout: TOC left + article right */
.page-layout {
  max-width: var(--layout-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: var(--layout-gap);
  align-items: flex-start;
}

/* Table of contents (left sidebar) */
.toc {
  width: var(--toc-width);
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
  margin-top: 2rem;
  transition: width 0.25s ease, margin 0.25s ease, opacity 0.25s ease;
}

/* Sidebar toggle: hide TOC and collapse layout */
.page-layout.sidebar-closed .toc {
  width: 0;
  min-width: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
}

.page-layout.sidebar-closed {
  gap: 0;
}

.toc__nav {
  padding: 0;
}

.toc__title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin: 0 0 0.75rem;
}

.toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--border);
  padding-left: 1rem;
}

.toc__list li {
  margin: 0;
  margin-bottom: 0.5rem;
}

.toc__list li:last-child {
  margin-bottom: 0;
}

.toc__list a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: none;
  display: block;
  line-height: 1.4;
  padding: 0.2rem 0.35rem;
  margin: 0 -0.35rem;
  border-radius: 4px;
  transition: color 0.2s ease, background 0.2s ease;
}

.toc__list a:hover {
  color: var(--text);
  background: var(--accent-muted);
}

.toc__list a:active {
  background: var(--hover-bg, rgba(0, 0, 0, 0.06));
  color: var(--text);
}

.toc__list a:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.toc__list a.is-active {
  color: var(--text);
  background: var(--bg-subtle);
  font-weight: 500;
  padding-left: 0.5rem;
  border-left: 2px solid var(--text-secondary);
  margin-left: -0.35rem;
  animation: toc-highlight 0.35s ease-out;
}

[data-theme="dark"] .toc__list a.is-active {
  background: var(--bg-subtle);
  border-left-color: var(--text-secondary);
}

@keyframes toc-highlight {
  from {
    background: transparent;
  }
  to {
    background: var(--bg-subtle);
  }
}

/* Article container */
.article {
  flex: 1;
  min-width: 0;
  max-width: 100%;
  padding: 2rem 0 4rem;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

/* Title area (report header) */
.article__header {
  margin-bottom: 1.5rem;
  min-width: 0;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

/* Meta: date + breadcrumb */
.article__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-bottom: 1rem;
}

.article__date {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.article__breadcrumb {
  display: flex;
  gap: 0.5rem;
}

.article__breadcrumb a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.article__breadcrumb a:hover {
  color: var(--text);
  border-bottom-color: var(--link-underline);
}

/* Hero: title + lead */
.article__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: 0 0 1rem;
  color: var(--text);
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.article__lead {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0 0 1.5rem;
  max-width: 60ch;
  font-weight: 500;
  letter-spacing: 0.01em;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.article__cta {
  margin: 0 0 1.5rem;
}

.article__cta-link {
  display: inline-block;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--link-underline);
  padding-bottom: 0.1em;
}

.article__cta-link:hover {
  border-bottom-color: var(--text);
}

.article__cta-link + .article__cta-sep,
.article__cta-sep + .article__cta-link {
  margin-left: 0.25rem;
}

.article__cta-sep {
  color: var(--text-secondary);
  font-weight: 400;
}

/* Body: flowing sections (serif for publication content) */
.article__body {
  font-family: var(--font-serif);
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  min-width: 0;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.article__section {
  scroll-margin-top: 2rem;
}

.article__section + .article__section {
  margin-top: 2.5rem;
}

.article__section h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  color: var(--text);
  padding-left: 1rem;
  border-left: 3px solid var(--accent-border);
}

.article__section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 1.5rem 0 0.5rem;
  color: var(--text);
}

.article__section p {
  margin: 0 0 1rem;
  color: var(--text);
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.article__section p:last-child {
  margin-bottom: 0;
}

.article__section ul,
.article__section ol {
  margin: 0 0 1rem;
  padding-left: 1.5rem;
  color: var(--text);
}

.article__section li {
  margin-bottom: 0.35rem;
}

.article__section code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  background: var(--code-bg, #f5f5f5);
  color: var(--text);
  border-radius: 4px;
}

.article__section pre {
  overflow-x: auto;
  padding: 1rem 1.25rem;
  background: var(--code-bg, #f5f5f5);
  border-radius: 6px;
  border: 1px solid var(--border);
  margin: 1.25rem 0;
  font-size: 0.875rem;
}

.article__section pre code {
  padding: 0;
  background: none;
}

/* Figures: italic caption */
.article__figure {
  margin: 1.5rem 0;
}

.article__figure img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* Plotly chart containers: consistent size, clean frame */
.article__figure--chart .plotly-chart {
  width: 100%;
  height: 320px;
  min-height: 280px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0, 0, 0, 0.04));
}

.article__figure--chart .plotly-chart .svg-container {
  border-radius: 8px;
}

.article__figure--chart .modebar {
  margin-top: 4px;
  margin-right: 4px;
}

.article__figure--chart .modebar-group {
  background: transparent !important;
}

.article__figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.4;
  font-style: italic;
}

.article__figure figcaption em {
  font-style: italic;
}

/* Tables */
.article__table-wrap {
  overflow-x: auto;
  margin: 1.25rem 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0, 0, 0, 0.04));
}

.article__table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.article__table-wrap th,
.article__table-wrap td {
  padding: 0.625rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.article__table-wrap th {
  font-weight: 500;
  background: var(--bg-subtle);
  color: var(--text);
  letter-spacing: 0.01em;
}

.article__table-wrap th.sortable-th {
  cursor: pointer;
  user-select: none;
}

.article__table-wrap th.sortable-th:hover {
  background: var(--border-light);
}

.article__table-wrap th[aria-sort="ascending"]::after {
  content: " \2191";
  font-size: 0.75em;
  opacity: 0.7;
}

.article__table-wrap th[aria-sort="descending"]::after {
  content: " \2193";
  font-size: 0.75em;
  opacity: 0.7;
}

.article__table-wrap tr:last-child td {
  border-bottom: none;
}

/* LLM evaluation table: wide, good-looking */
.eval-table-wrap {
  margin: 1.25rem 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: auto;
  box-shadow: var(--shadow-md, 0 1px 3px rgba(0, 0, 0, 0.06));
}

.eval-table {
  width: max-content;
  min-width: 100%;
  font-size: 0.875rem;
}

.eval-table th,
.eval-table td {
  padding: 0.625rem 0.875rem;
  white-space: nowrap;
  border-bottom: 1px solid var(--border-light);
}

.eval-table th {
  background: var(--bg-subtle);
  font-weight: 600;
  color: var(--text);
  position: sticky;
  top: 0;
  z-index: 1;
}

.eval-table thead th {
  border-bottom: 1px solid var(--border);
}

.eval-table__provider {
  position: sticky;
  left: 0;
  background: var(--bg);
  z-index: 2;
  white-space: nowrap;
  font-weight: 500;
  box-shadow: var(--shadow-sticky, 2px 0 4px -2px rgba(0, 0, 0, 0.06));
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.eval-table thead .eval-table__provider {
  background: var(--bg-subtle);
}

.eval-table tbody tr:hover .eval-table__provider {
  background: var(--bg-subtle);
}

.eval-table__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-subtle);
}

.eval-table__icon img {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.eval-table tbody tr:hover {
  background: var(--tr-hover, rgba(0, 0, 0, 0.02));
}

.eval-table tbody tr:nth-child(even) {
  background: var(--tr-even, rgba(0, 0, 0, 0.01));
}

.eval-table tbody tr:nth-child(even):hover {
  background: var(--tr-even-hover, rgba(0, 0, 0, 0.03));
}

.eval-table td:not(.eval-table__provider) {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.eval-table .sortable-th {
  min-width: 4rem;
}

.eval-table-caption {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.4;
  font-style: italic;
}

/* Radar chart (Plotly) from table data */
.eval-radar-wrap {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.eval-radar-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.eval-radar-select {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  margin-bottom: 1rem;
  min-width: 12rem;
}

.eval-radar-chart {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.eval-scatter-wrap {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.eval-scatter-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.eval-scatter-axis-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Article footer: logo, nav, tags, author */
.article__footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.article__footer-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.article__footer-logo {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: opacity 0.2s ease;
}

.article__footer-logo:hover {
  opacity: 0.7;
}

.article__footer-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.article__footer-nav a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.article__footer-nav a:hover {
  color: var(--text);
}

.article__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.article__tags span {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

.article__tags a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.article__tags a:hover {
  color: var(--text);
  border-bottom-color: var(--link-underline);
}

.article__author {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin: 0;
}

.article__author a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--link-underline);
}

.article__author a:hover {
  border-bottom-color: var(--text);
}

/* Global links */
a {
  color: var(--link);
}

a:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

/* Responsive: header on small screens */
@media (max-width: 768px) {
  .site-header__inner {
    flex-wrap: wrap;
    padding: 0 16px;
    gap: 0.5rem 1rem;
    min-height: var(--header-height);
    height: auto;
    padding-bottom: 0.75rem;
  }

  .site-header__inner:has(.site-header__nav) {
    gap: 0.5rem 1rem;
  }

  .site-header__nav {
    order: 10;
    flex-basis: 100%;
    margin-left: 0;
    margin-top: 0.25rem;
    padding-top: 0.375rem;
    justify-content: flex-end;
    gap: 1rem;
  }

  .site-header__inner:has(.site-header__nav) .theme-toggle {
    margin-left: auto;
  }

  .site-header__nav-link {
    font-size: 0.8125rem;
  }
}

/* Hide TOC on mobile (keep navbar) */
@media (max-width: 768px) {
  .toc,
  .toc-toggle {
    display: none;
  }
}

/* Responsive: TOC above content on narrow screens */
@media (max-width: 899px) {
  .page-layout {
    flex-direction: column;
    gap: 1.5rem;
    padding: 0 16px;
  }

  .toc {
    position: static;
    width: 100%;
    margin-top: 0;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
  }

  .page-layout.sidebar-closed .toc {
    display: none;
  }

  .toc__list {
    border-left: none;
    padding-left: 0;
  }
}

/* Responsive: publication/report content on small screens */
@media (max-width: 768px) {
  .page-layout {
    padding: 0 16px;
    max-width: 100%;
    box-sizing: border-box;
  }

  .page-layout > .article {
    min-width: 0;
    max-width: 100%;
  }

  .article {
    padding: 1.25rem 0 3rem;
  }

  .article__header {
    margin-bottom: 1.25rem;
  }

  .article__title {
    font-size: clamp(1.75rem, 6vw, 2.25rem);
  }

  .article__lead {
    font-size: 1.0625rem;
  }

  .article__body {
    padding-top: 1.25rem;
  }

  .article__section h2 {
    font-size: 1.375rem;
    padding-left: 0.75rem;
  }

  .article__section + .article__section {
    margin-top: 2rem;
  }

  .article__table-wrap {
    margin: 1rem 0;
    border-radius: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .article__table-wrap th,
  .article__table-wrap td {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
  }

  .article__figure--chart .plotly-chart {
    height: 260px;
    min-height: 220px;
  }

  .article__figure figcaption {
    font-size: 0.8125rem;
  }

  .eval-table-wrap {
    margin: 1rem 0;
    border-radius: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .eval-table th,
  .eval-table td {
    padding: 0.5rem 0.625rem;
    font-size: 0.8125rem;
  }

  .eval-radar-wrap,
  .eval-scatter-wrap {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
  }

  .eval-radar-select {
    min-width: 0;
    width: 100%;
    max-width: 16rem;
  }

  .eval-scatter-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .eval-scatter-controls .eval-radar-select {
    max-width: none;
  }

  .eval-table-caption {
    font-size: 0.75rem;
  }
}

/* ----- Report & shared: scroll and load animations ----- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Title area: slide-up only (opacity stays 1) so content is always visible */
@keyframes slideUp {
  from {
    transform: translateY(16px);
  }
  to {
    transform: translateY(0);
  }
}

.animate-in {
  animation: slideUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

/* Optional stagger for other pages (e.g. homepage) */
.animate-in--delay-1 {
  animation: slideUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) 0.05s forwards;
}

.animate-in--delay-2 {
  animation: slideUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) 0.1s forwards;
}

.animate-in--delay-3 {
  animation: slideUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll--delay-1 {
  transition-delay: 0.08s;
}

.animate-on-scroll--delay-2 {
  transition-delay: 0.16s;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .animate-in,
  .animate-in--delay-1,
  .animate-in--delay-2,
  .animate-in--delay-3 {
    animation-duration: 0.01ms;
    animation-delay: 0s;
  }
  .animate-on-scroll {
    transition-duration: 0.01ms;
    transition-delay: 0s;
  }
}