/* PersoMoni - Academic project page */

:root {
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --surface: #ffffff;
  --text: #1a1f2e;
  --text-muted: #4a5568;
  --text-light: #6b7280;
  --text-emphasis: #1e3a5f;
  --primary: #1e3a5f;
  --primary-mid: #2c5282;
  --accent: #2c5282;
  --accent-soft: #edf2f7;
  --border: #d8dee8;
  --border-strong: #a0aec0;
  --rule: #cbd5e0;
  --shadow: none;
  --shadow-sm: 0 1px 2px rgba(26, 31, 46, 0.04);
  --radius: 2px;
  --radius-lg: 2px;
  --font-serif: "Source Serif 4", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --font-sans: "Source Sans 3", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Consolas, monospace;
  --nav-height: 52px;
  --content-width: 920px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
}

body {
  font-family: var(--font-sans);
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary-mid);
  text-decoration: underline;
  text-decoration-color: rgba(44, 82, 130, 0.35);
  text-underline-offset: 2px;
  transition: color 0.15s, text-decoration-color 0.15s;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: min(var(--content-width), 92vw);
  margin-inline: auto;
}

.container-wide {
  width: min(1080px, 94vw);
  margin-inline: auto;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
}

.nav.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: min(1080px, 94vw);
  margin-inline: auto;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.nav-logo-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 4px;
}

.nav-logo:hover {
  color: var(--primary);
}

.nav-logo span {
  color: var(--primary-mid);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.35rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.nav-links a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.nav-cta {
  color: var(--primary) !important;
  border: 1px solid var(--border-strong);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius);
  text-decoration: none !important;
}

.nav-cta:hover {
  background: var(--bg-alt);
  border-color: var(--primary-mid);
  color: var(--primary) !important;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.82rem;
  font-weight: 500;
}

.lang-switch a {
  color: var(--text-light);
  text-decoration: none;
  padding: 0.1rem;
}

.lang-switch a:hover,
.lang-switch a.lang-active {
  color: var(--primary);
  text-decoration: underline;
}

.lang-divider {
  color: var(--rule);
  user-select: none;
}

body.lang-zh {
  font-family: "Noto Sans SC", var(--font-sans), system-ui, sans-serif;
}

body.lang-zh .hero-title,
body.lang-zh .section-header h2,
body.lang-zh .footer-logo {
  font-family: "Noto Serif SC", var(--font-serif), serif;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text);
}

/* Hero - paper title block */
.hero {
  padding: calc(var(--nav-height) + 2.75rem) 0 2.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.hero-content {
  text-align: center;
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--border);
}

.badge-venue {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  text-transform: none;
  letter-spacing: 0.01em;
  font-size: 0.7rem;
}

.badge-type {
  background: var(--bg-alt);
  color: var(--primary-mid);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 0.85rem;
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 1.75rem;
  line-height: 1.65;
  font-weight: 400;
}

.key-term {
  color: var(--primary);
  font-weight: 600;
}

.hero-subtitle .key-term,
.hero-subtitle em {
  color: var(--primary);
  font-style: normal;
  font-weight: 600;
}

.authors {
  margin-bottom: 1.75rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
  max-width: 760px;
  margin-inline: auto;
  text-align: center;
}

.author-list {
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text);
  text-align: center;
}

.author-list a {
  color: var(--text);
  text-decoration: none;
}

.author-list a:hover {
  color: var(--primary-mid);
  text-decoration: underline;
}

.fellow {
  font-size: 0.8rem;
  color: var(--text-light);
}

.affiliations {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-top: 0.5rem;
  line-height: 1.6;
  text-align: center;
}

.affiliations p {
  margin: 0 0 0.3rem;
  padding: 0;
}

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

.affiliations sup {
  margin-right: 0.15rem;
  font-weight: 600;
  color: var(--text-muted);
}

.affiliations a {
  color: var(--primary-mid);
  text-decoration-color: rgba(44, 82, 130, 0.3);
}

.affiliations a:hover {
  color: var(--primary);
}

.corresponding {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.45rem;
  font-style: italic;
  text-align: center;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 500;
  border: 1px solid var(--border-strong);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.btn:hover {
  transform: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: none;
}

.btn-primary:hover {
  background: var(--primary-mid);
  color: #fff;
}

.btn-secondary,
.btn-ghost {
  background: var(--surface);
  color: var(--text);
}

.btn-secondary:hover,
.btn-ghost:hover {
  background: var(--bg-alt);
  color: var(--primary);
  border-color: var(--primary-mid);
}

/* Stats bar */
.stats-bar {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  text-align: center;
}

.stat-card {
  padding: 0.65rem 0.5rem;
  border-right: 1px solid var(--border);
}

.stat-card:last-child {
  border-right: none;
}

.stat-value {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* Sections */
.section {
  padding: 3.25rem 0;
  border-bottom: 1px solid var(--border);
}

.section-alt {
  background: var(--bg-alt);
}

.section-header {
  max-width: 100%;
  margin: 0 0 2rem;
  text-align: center;
}

.section-tag {
  display: block;
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 0.45rem;
}

.section-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 3vw, 1.65rem);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.75rem;
  color: var(--text);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}

.section-lead {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.75;
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
}

.section-lead .key-term,
.section-lead strong {
  color: var(--text-emphasis);
  font-weight: 600;
}

/* Teaser figure */
.teaser-figure {
  margin-bottom: 2.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
}

.teaser-figure img,
.overview-svg svg {
  width: 100%;
  height: auto;
  display: block;
}

.teaser-figure img {
  padding: 1rem 1rem 0;
  background: var(--bg-alt);
}

.overview-svg {
  padding: 1rem 1rem 0;
  background: var(--bg-alt);
  line-height: 0;
}

.teaser-figure figcaption {
  padding: 0.85rem 1.1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.65;
  text-align: justify;
  background: var(--bg-alt);
}

.teaser-figure figcaption strong {
  color: var(--text-emphasis);
  font-weight: 600;
}

/* Contributions */
.highlights {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid var(--border);
  background: var(--surface);
}

.highlight-card {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  grid-template-rows: auto auto;
  gap: 0.25rem 1rem;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  transition: none;
}

.highlight-card:last-child {
  border-bottom: none;
}

.highlight-card:hover {
  box-shadow: none;
  transform: none;
  background: var(--bg-alt);
}

.highlight-icon {
  grid-column: 1;
  grid-row: 1 / -1;
  align-self: start;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.65;
}

.highlight-card h3 {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0;
  color: var(--text);
}

.highlight-card p {
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.68;
  text-align: justify;
}

.highlight-card p .key-term {
  color: var(--primary);
  font-weight: 600;
}

/* Dataset */
.dataset-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.dataset-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: stretch;
}

.dataset-info,
.dataset-specs {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.35rem 1.5rem;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.dataset-info h3,
.dataset-specs h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}

.feature-list {
  list-style: none;
  flex: 1;
}

.feature-list li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.7rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
  text-align: justify;
}

.feature-list li::before {
  content: "-";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--text-light);
  font-size: 0.8rem;
}

.feature-list strong {
  color: var(--primary);
  font-weight: 600;
}

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

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  flex: 1;
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
}

.spec-table th {
  color: var(--text-muted);
  font-weight: 500;
  width: 42%;
  background: var(--bg-alt);
}

.spec-table td {
  color: var(--text);
  font-weight: 400;
}

.spec-table td .key-term,
.spec-table td strong {
  color: var(--primary);
  font-weight: 600;
}

.comparison-banner {
  display: grid;
  grid-template-columns: 1fr 3rem 1fr;
  align-items: stretch;
  width: 100%;
  border: 1px solid var(--border);
  background: var(--surface);
}

.comparison-item {
  padding: 1.1rem 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.comparison-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.comparison-old .comparison-label {
  color: var(--text-light);
}

.comparison-new .comparison-label {
  color: var(--primary);
}

.comparison-item p {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.comparison-new p .key-term {
  color: var(--primary);
  font-weight: 600;
}

.comparison-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-light);
  padding: 0 0.25rem;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  background: var(--bg-alt);
}

/* Method pipeline */
.method-pipeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.pipeline-step {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.25rem 1.1rem;
  text-align: left;
}

.pipeline-num {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.6rem;
}

.pipeline-num::after {
  content: ".";
}

.pipeline-step h4 {
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.pipeline-step p {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.65;
  text-align: justify;
}

.pipeline-connector {
  display: none;
}

.method-insight blockquote {
  background: var(--bg-alt);
  border-left: 3px solid var(--primary);
  padding: 1rem 1.25rem;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--text-muted);
  line-height: 1.72;
  text-align: justify;
  box-shadow: none;
}

/* Traits grid */
.traits-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
}

.trait-domain {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1rem 0.85rem;
  border-top: 2px solid var(--primary);
  transition: none;
}

.trait-domain:hover {
  transform: none;
  box-shadow: none;
}

.trait-domain[data-domain="extraversion"],
.trait-domain[data-domain="agreeableness"],
.trait-domain[data-domain="conscientiousness"],
.trait-domain[data-domain="negative"],
.trait-domain[data-domain="openness"] {
  border-top-color: var(--primary);
}

.trait-domain h3 {
  font-family: var(--font-serif);
  font-size: 0.84rem;
  font-weight: 600;
  margin-bottom: 0.65rem;
  color: var(--text-emphasis);
  line-height: 1.35;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--rule);
}

.trait-domain ul {
  list-style: none;
}

.trait-domain li {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 0.28rem 0;
  line-height: 1.45;
}

.trait-domain li + li {
  border-top: 1px dotted var(--border);
}

/* Citation */
.citation-box {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
}

.bibtex {
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--text-muted);
  background: var(--bg-alt);
}

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

.btn-copy {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: var(--surface);
  color: var(--text);
  padding: 0.35rem 0.75rem;
  font-size: 0.78rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
}

.btn-copy:hover {
  background: var(--bg-alt);
  color: var(--primary);
}

/* Footer */
.footer {
  background: var(--bg-alt);
  color: var(--text-muted);
  padding: 2rem 0 1.5rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: start;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  display: block;
  margin-bottom: 0.35rem;
}

.footer-brand p {
  font-size: 0.8rem;
  max-width: 420px;
  line-height: 1.6;
  color: var(--text-muted);
}

.footer-brand a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-brand a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.84rem;
  font-weight: 500;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.footer-copy {
  grid-column: 1 / -1;
  font-size: 0.76rem;
  color: var(--text-light);
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 960px) {
  .traits-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .dataset-top {
    grid-template-columns: 1fr;
  }

  .method-pipeline {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-card:nth-child(2) {
    border-right: none;
  }

  .stat-card:nth-child(1),
  .stat-card:nth-child(2) {
    border-bottom: 1px solid var(--border);
  }

  .comparison-banner {
    grid-template-columns: 1fr;
  }

  .comparison-arrow {
    border-left: none;
    border-right: none;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 0.35rem;
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.25rem;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s, opacity 0.25s;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .traits-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-card {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .stat-card:last-child {
    border-bottom: none;
  }

  .affiliations {
    font-size: 0.74rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .btn-copy {
    position: static;
    width: 100%;
    justify-content: center;
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-bottom: none;
  }

  .citation-box {
    display: flex;
    flex-direction: column;
  }

  .section-lead,
  .highlight-card p,
  .feature-list li,
  .pipeline-step p,
  .method-insight blockquote,
  .teaser-figure figcaption {
    text-align: left;
  }

  .section-header {
    text-align: left;
  }

  .section-lead {
    margin-inline: 0;
  }
}