/* ===== CSS Variables for Theming ===== */
:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --text-muted: #777777;
  --heading-color: #222222;
  --link-color: #b509ac; /* purple-pink like al-folio */
  --link-hover: #8a077f;
  --border-color: #e5e5e5;
  --nav-bg: #ffffff;
  --nav-border: #e5e5e5;
  --card-bg: #ffffff;
  --icon-color: #333333;
  --btn-border: #333333;
  --btn-text: #333333;
  --btn-hover-bg: #333333;
  --btn-hover-text: #ffffff;
  --badge-text: #ffffff;
  --footer-bg: transparent;
  --code-bg: #f5f5f5;
}

[data-theme="dark"] {
  --bg-color: #1a1a2e;
  --text-color: #e0e0e0;
  --text-muted: #aaaaaa;
  --heading-color: #f0f0f0;
  --link-color: #d98cd5;
  --link-hover: #eab0e7;
  --border-color: #333355;
  --nav-bg: #16213e;
  --nav-border: #333355;
  --card-bg: #16213e;
  --icon-color: #e0e0e0;
  --btn-border: #bbbbbb;
  --btn-text: #e0e0e0;
  --btn-hover-bg: #e0e0e0;
  --btn-hover-text: #1a1a2e;
  --badge-text: #ffffff;
  --footer-bg: transparent;
  --code-bg: #2a2a4a;
}

/* ===== Base Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  max-width: 920px;
  margin: 0 auto;
  padding: 20px 30px;
  line-height: 1.7;
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ===== Navigation Bar ===== */
.navbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 12px 0;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  transition: border-color 0.3s ease;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  font-size: 1em;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--link-color);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.2em;
  color: var(--text-color);
  padding: 4px 8px;
  transition: color 0.2s ease;
  display: flex;
  align-items: center;
}

.theme-toggle:hover {
  color: var(--link-color);
}

/* ===== About Section Layout ===== */
#about {
  display: block;
  margin-bottom: 10px;
}

.name-header {
  font-size: 2.2em;
  font-weight: 700;
  margin-top: 20px;
  margin-bottom: 14px;
  color: var(--heading-color);
  transition: color 0.3s ease;
}

/* Sidebar: photo + title + icons */
.about-right {
  float: right;
  width: 280px;
  text-align: center;
  margin-left: 30px;
  margin-bottom: 15px;
}

.profile-pic-right {
  width: 240px;
  height: auto;
  border-radius: 50%;
  margin-bottom: 10px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.10);
  transition: box-shadow 0.3s ease;
}

[data-theme="dark"] .profile-pic-right {
  box-shadow: 0 4px 16px rgba(0,0,0,0.35);
}

.profile-title {
  font-size: 0.92em;
  color: var(--text-muted);
  margin-bottom: 2px;
  line-height: 1.4;
}

.profile-email {
  font-size: 0.85em;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.4;
}

/* Social Icons Row (under photo) */
.social-icons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  margin-top: 8px;
  margin-bottom: 6px;
}

.social-icons a {
  color: var(--icon-color);
  text-decoration: none;
  font-size: 1.6rem;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-flex;
  align-items: center;
}

.social-icons a:hover {
  color: var(--link-color);
  transform: scale(1.15);
}

.social-icons .scholar-img {
  width: 30px;
  height: 30px;
  object-fit: contain;
  transition: transform 0.2s ease;
  filter: var(--scholar-filter, none);
}

[data-theme="dark"] .social-icons .scholar-img {
  filter: invert(0.85);
}

.social-icons a:hover .scholar-img {
  transform: scale(1.15);
}

.social-hint {
  font-size: 0.78em;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== Paragraphs & Links in intro ===== */
#about p {
  margin-bottom: 14px;
  text-align: left;
}

.intro-link {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* ===== Section Titles ===== */
section {
  margin-bottom: 22px;
}

.section-title {
  font-size: 1.7em;
  font-weight: 400;
  margin-top: 30px;
  margin-bottom: 16px;
  color: var(--heading-color);
  transition: color 0.3s ease;
  border: none;
}

h2 {
  border: none !important;
  font-weight: normal !important;
}

h3.section-title {
  font-size: 1.2em;
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 10px;
  color: var(--heading-color);
}

/* ===== Publication Entry (al-folio style) ===== */
.pub {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 26px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--border-color);
  transition: border-color 0.3s ease;
}

.pub:last-child {
  border-bottom: none;
}

/* Venue Badge Column */
.pub-badge-col {
  flex-shrink: 0;
  width: 90px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding-top: 2px;
}

.venue-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.78em;
  font-weight: 700;
  color: var(--badge-text);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

/* Venue badge colors */
.badge-neurips   { background-color: #8e24aa; }
.badge-emnlp     { background-color: #d32f2f; }
.badge-preprint  { background-color: #757575; }
.badge-journal   { background-color: #1565c0; }
.badge-ichms     { background-color: #00838f; }
.badge-iclr      { background-color: #e91e63; }
.badge-workshop  { background-color: #8e24aa; }

.venue-badge-sub {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7em;
  font-weight: 600;
  color: var(--badge-text);
  background-color: #af52bf;
}

/* Publication Content */
.pub-content {
  flex: 1;
  min-width: 0;
}

.pub-content .pub-title {
  font-weight: 700;
  font-size: 1em;
  line-height: 1.45;
  color: var(--heading-color);
  margin-bottom: 4px;
}

.pub-content .pub-authors {
  font-size: 0.92em;
  color: var(--text-color);
  margin-bottom: 3px;
  line-height: 1.5;
}

.pub-content .pub-venue {
  font-style: italic;
  font-size: 0.9em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* Publication Action Buttons */
.pub-links {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pub-link {
  display: inline-block;
  color: var(--btn-text);
  border: 1px solid var(--btn-border);
  padding: 3px 12px;
  text-decoration: none;
  font-size: 0.8em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: all 0.2s ease;
}

.pub-link:hover {
  background-color: var(--btn-hover-bg);
  color: var(--btn-hover-text);
}

/* ===== Teaching & Service ===== */
.section-content {
  text-align: left;
  line-height: 1.8;
}

/* ===== Footer ===== */
footer {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 0.88em;
  color: var(--text-muted);
  transition: border-color 0.3s ease, color 0.3s ease;
}

.footer-icons {
  display: none; /* Icons moved to sidebar */
}

/* ===== Clearfix ===== */
.clearfix::after {
  content: "";
  display: table;
  clear: both;
}

/* ===== Responsive ===== */
@media (max-width: 680px) {
  body {
    padding: 15px;
  }

  .about-right {
    float: none;
    width: 100%;
    margin-left: 0;
    margin-bottom: 20px;
  }

  .profile-pic-right {
    width: 180px;
  }

  .pub {
    flex-direction: column;
    gap: 8px;
  }

  .pub-badge-col {
    width: auto;
    flex-direction: row;
    gap: 6px;
  }

  .name-header {
    font-size: 1.7em;
  }
}

/* ===== Smooth transitions for theme ===== */
a, i, img, .pub, .pub-link, footer, .navbar, section {
  transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}