/* ========================================
   Custom Styles — Hanxi Xiao Academic Site
   Full dark theme overrides for Beautiful Jekyll
   ======================================== */

/* --- Typography --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --body-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --header-font: 'Lora', Georgia, serif;

  --accent: var(--link-col);
  --accent-hover: var(--hover-col);
  --accent-dim: color-mix(in srgb, var(--link-col) 15%, transparent);

  --bg-primary: var(--page-col);
  --bg-elevated: var(--navbar-border-col);
  --bg-card: color-mix(in srgb, var(--page-col) 88%, white);
  --bg-card-hover: color-mix(in srgb, var(--page-col) 84%, white);

  --text-primary: var(--text-col);
  --text-secondary: var(--footer-text-col);
  --text-muted: color-mix(in srgb, var(--text-col) 45%, black);

  --border-color: var(--navbar-border-col);
  --border-subtle: color-mix(in srgb, var(--text-col) 8%, transparent);
}




body {
  font-family: var(--body-font);
  font-size: 1.0625rem;
  line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--header-font);
  font-weight: 700;
  color: var(--text-primary);
}

p {
  margin: 1.25rem 0;
}

a {
  transition: color 0.2s ease;
}

/* --- Navbar --- */
.navbar-custom {
  font-family: var(--body-font);
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
}

.navbar-custom .nav-link {
  transition: color 0.2s ease, opacity 0.2s ease;
  opacity: 0.85;
}

.navbar-custom .nav-link:hover,
.navbar-custom .nav-link:focus {
  opacity: 1;
}

.navbar-custom .navbar-brand {
  font-family: var(--header-font);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

/* Avatar in navbar */
.avatar-container {
  border: none;
}

.avatar-img-border {
  border: 3px solid rgba(255, 255, 255, 0.1);
  background: transparent;
  transition: border-color 0.2s ease;
}

.avatar-img-border:hover {
  border-color: rgba(255, 255, 255, 0.3);
}

/* --- Header Section --- */
.intro-header .page-heading h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.intro-header .page-heading .page-subheading {
  font-family: var(--body-font);
  font-weight: 400;
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0.5rem auto 0;
}

hr.small {
  border-color: var(--accent);
  opacity: 0.3;
}

/* --- Bio Section (Homepage) --- */
.bio-section {
  display: flex;
  align-items: flex-start;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.bio-photo {
  flex-shrink: 0;
}

.bio-photo img {
  width: 200px;
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  border: 2px solid var(--border-subtle);
}

.bio-text h2 {
  font-size: 1.75rem;
  margin-top: 0;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.bio-affiliation {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.bio-affiliation a {
  color: var(--accent);
}

.bio-text p {
  font-size: 1rem;
  margin: 0.75rem 0;
  line-height: 1.7;
  color: var(--text-secondary);
}

.bio-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.bio-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.bio-links a:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

.bio-links a i {
  font-size: 0.875rem;
}

/* --- Section Headings --- */
.section-heading {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-dim);
}

/* --- Publication Cards --- */
.pub-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pub-card {
  display: flex;
  padding: 1.25rem 0 1.25rem 1.25rem;
  margin-bottom: 0.75rem;
  border-left: 3px solid var(--accent);
  background: var(--bg-card);
  border-radius: 0 8px 8px 0;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.pub-card:hover {
  background: var(--bg-card-hover);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.2);
}

.pub-content {
  flex: 1;
  padding-right: 1.25rem;
}

.pub-title {
  font-family: var(--body-font);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  margin: 0 0 0.35rem 0;
  line-height: 1.4;
}

.pub-authors {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0 0 0.25rem 0;
}

.pub-authors .me {
  font-weight: 600;
  color: var(--accent);
}

.pub-venue {
  font-size: 0.875rem;
  font-style: italic;
  color: var(--text-muted);
  margin: 0 0 0.6rem 0;
}

.pub-venue .venue-badge {
  display: inline-block;
  font-style: normal;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.4rem;
  vertical-align: middle;
}

.venue-badge.top {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--accent);
}


.venue-badge.high {
  background: var(--accent-dim);
  color: var(--accent);
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.pub-links a {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: var(--accent-dim);
  color: var(--accent);
  text-decoration: none;
  transition: all 0.2s ease;
}

.pub-links a:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

.see-all-link {
  display: inline-block;
  font-weight: 500;
  font-size: 0.9375rem;
  margin-top: 0.75rem;
  color: var(--accent);
  text-decoration: none;
}

.see-all-link:hover {
  color: var(--accent-hover);
}

.see-all-link::after {
  content: " \2192";
  transition: transform 0.2s ease;
}

/* --- News Timeline --- */
.news-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.news-item {
  display: flex;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.news-item:last-child {
  border-bottom: none;
}

.news-date {
  flex-shrink: 0;
  width: 100px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  padding-top: 0.1rem;
}

.news-content {
  flex: 1;
  color: var(--text-secondary);
}

.news-content a {
  font-weight: 500;
}

.news-content strong {
  color: var(--text-primary);
}

/* --- Footer --- */
footer {
  font-size: 0.8125rem;
}

footer .beautiful-jekyll-footer {
  padding: 2rem 0;
}

footer .theme-by {
  font-size: 0.6875rem;
  opacity: 0.5;
}

/* --- Blog Post List --- */
.post-preview .post-title {
  font-family: var(--header-font);
  color: var(--text-primary);
}

.post-preview .post-subtitle {
  font-family: var(--body-font);
  color: var(--text-secondary);
}

.post-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* --- Blog intro box (dark theme readable) --- */
.blog-intro.box-note {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-left: 0.3125rem solid var(--accent);
}

.blog-intro.box-note strong {
  color: var(--text-primary);
}

.blog-intro.box-note a {
  color: var(--accent);
}

.blog-intro.box-note a:hover,
.blog-intro.box-note a:focus {
  color: var(--accent-hover);
}

/* --- Dark theme fixes for Beautiful Jekyll elements --- */
blockquote {
  color: var(--text-muted);
}

.jumbotron {
  background: var(--bg-elevated);
}

/* Fix code blocks for dark background */
code {
  background: var(--bg-elevated);
  color: var(--accent);
}

pre {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
}

/* Fix form inputs if any */
input, textarea, select {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border-color);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .bio-section {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
  }

  .bio-photo img {
    width: 160px;
  }

  .bio-links {
    justify-content: center;
  }

  .bio-text h2 {
    font-size: 1.5rem;
  }

  .intro-header .page-heading h1 {
    font-size: 2rem;
  }

  .news-item {
    flex-direction: column;
    gap: 0.25rem;
  }

  .news-date {
    width: auto;
  }

  .pub-card {
    padding: 1rem 0.75rem 1rem 1rem;
  }
}

/* --- Details / Collapsible Sections --- */
details {
  background: var(--bg-card);
  border-left: 4px solid var(--accent);
  padding: 0.9rem 1rem 0.9rem 1.5rem;
  margin: 1rem 0;
  border-radius: 4px;
  color: var(--text-primary);
}

details summary {
  font-weight: 700;
  color: var(--accent);
  cursor: pointer;
  margin-bottom: 0.5rem;
  margin-left: -0.3rem;
  list-style-position: inside;
}

details[open] summary {
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--accent-dim);
}

/* --- Utility --- */
.mt-section {
  margin-top: 3rem;
}

.mb-section {
  margin-bottom: 3rem;
}