/* === RESET & BASE === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --accent: #1a3a5c;
  --accent-light: #2a5a8c;
  --text: #1a1a1a;
  --text-muted: #555;
  --bg: #fff;
  --bg-alt: #f7f8fa;
  --border: #e0e0e0;
  --nav-height: 52px;
  --max-width: 800px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--accent-light);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* === NAVIGATION (left sidebar) === */
nav {
  position: fixed;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 12px;
  background: var(--bg);
  border-radius: 0 12px 12px 0;
  box-shadow: 2px 0 12px rgba(0, 0, 0, 0.05);
}

nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 8px;
  border-radius: 6px;
  transition: color 0.15s;
  text-decoration: none;
  white-space: nowrap;
}

nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

nav a.active {
  color: var(--accent);
  font-weight: 600;
}

.nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
  transition: background 0.15s, transform 0.15s;
}

nav a.active .nav-dot {
  background: var(--accent);
  transform: scale(1.3);
}

nav a:hover .nav-dot {
  background: var(--accent-light);
}

/* === MAIN LAYOUT === */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 0 24px;
}

section {
  padding: 32px 0 24px;
}

/* === ABOUT SECTION === */
.about {
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

.about-photo {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.about-info h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.about-info .title {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.about-info .bio {
  margin-bottom: 16px;
}

.about-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.about-links a {
  display: inline-flex;
  align-items: center;
  color: var(--text-muted);
  transition: color 0.15s;
}

.about-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

/* === SECTION HEADERS === */
h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 20px;
}

h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  margin-top: 24px;
}

/* === COLLAPSIBLE SECTIONS === */
.collapsible-header {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  padding: 8px 0;
}

.collapsible-header:hover {
  color: var(--accent-light);
}

.collapsible-header::before {
  content: "\25B6";
  font-size: 10px;
  transition: transform 0.2s;
  flex-shrink: 0;
}

.collapsible-header.open::before {
  transform: rotate(90deg);
}

.collapsible-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.collapsible-content.open {
  max-height: none;
}

/* === PUBLICATION ENTRIES === */
.pub-year {
  font-size: 17px;
  font-weight: 600;
  color: var(--accent);
}

.pub-count {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 400;
}

.pub-entry {
  padding: 8px 0 8px 20px;
  border-left: 2px solid var(--border);
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.5;
}

.pub-entry .authors {
  color: var(--text);
}

.pub-entry .authors .self {
  font-weight: 600;
}

.pub-entry .pub-title {
  color: var(--text);
}

.pub-entry .journal {
  font-style: italic;
  color: var(--text-muted);
}

.pub-entry .journal-link {
  text-decoration: none;
}

.pub-entry .journal-link .journal {
  color: var(--accent-light);
}

.pub-entry .journal-link:hover .journal {
  text-decoration: underline;
}

.pub-entry .pub-video-link {
  font-size: 12px;
  margin-left: 6px;
}

.pub-entry .pub-type-tag {
  font-size: 11px;
  background: var(--bg-alt);
  color: var(--text-muted);
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 4px;
}

/* === LIST ENTRIES (presentations, outreach, teaching) === */
.entry-list {
  list-style: none;
}

.entry-list li {
  padding: 6px 0 6px 20px;
  border-left: 2px solid var(--border);
  margin-bottom: 6px;
  font-size: 14px;
  line-height: 1.5;
}

.entry-list .year-tag {
  font-size: 12px;
  color: var(--text-muted);
  margin-right: 6px;
}

.entry-list .venue {
  font-weight: 600;
}

.entry-list .type-tag {
  font-size: 11px;
  background: var(--bg-alt);
  color: var(--text-muted);
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 4px;
}

/* === SUBSECTION HEADER (e.g., "Peer-Reviewed", "Book Chapters") === */
.subsection-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 20px;
  margin-bottom: 8px;
}

/* === VIDEO GRID (Featured Talks) === */
.video-grid {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 12px;
  -webkit-overflow-scrolling: touch;
}

.video-grid::-webkit-scrollbar {
  height: 6px;
}

.video-grid::-webkit-scrollbar-track {
  background: var(--bg-alt);
  border-radius: 3px;
}

.video-grid::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.video-card {
  flex: 0 0 calc(50% - 10px);
  scroll-snap-align: start;
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-alt);
  transition: transform 0.15s, box-shadow 0.15s;
}

.video-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.video-card a {
  text-decoration: none;
  color: inherit;
}

.video-card .thumb-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.video-card .thumb-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-card .play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  background: rgba(0, 0, 0, 0.7);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

.video-card:hover .play-btn {
  background: rgba(220, 40, 40, 0.9);
}

.video-card .play-btn svg {
  fill: white;
  width: 20px;
  height: 20px;
  margin-left: 3px;
}

.video-card .video-info {
  padding: 12px;
}

.video-card .video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 4px;
}

.video-card .video-meta {
  font-size: 12px;
  color: var(--text-muted);
}

/* === PUBLICATION PREVIEW GRID === */
.pub-preview-grid {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 12px;
  -webkit-overflow-scrolling: touch;
}

.pub-preview-grid::-webkit-scrollbar {
  height: 6px;
}

.pub-preview-grid::-webkit-scrollbar-track {
  background: var(--bg-alt);
  border-radius: 3px;
}

.pub-preview-grid::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.pub-preview-card {
  flex: 0 0 calc(50% - 8px);
  scroll-snap-align: start;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.15s;
  border: 1px solid var(--border);
}

.pub-preview-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.pub-preview-card a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.pub-preview-card .pub-thumb {
  width: 100%;
  object-fit: contain;
  display: block;
  background: white;
}

.pub-preview-card .pub-preview-info {
  padding: 12px;
}

.pub-preview-card .pub-preview-journal-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.pub-preview-card .pub-preview-favicon {
  width: 16px;
  height: 16px;
  border-radius: 2px;
  flex-shrink: 0;
}

.pub-preview-card .pub-preview-journal {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--accent);
}

.pub-preview-card .pub-preview-year {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
}

.pub-preview-card .pub-preview-title {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

/* === PODCAST CAROUSEL === */
.podcast-carousel {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 12px;
  -webkit-overflow-scrolling: touch;
}

.podcast-carousel::-webkit-scrollbar {
  height: 6px;
}

.podcast-carousel::-webkit-scrollbar-track {
  background: var(--bg-alt);
  border-radius: 3px;
}

.podcast-carousel::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.podcast-card {
  flex: 0 0 200px;
  scroll-snap-align: start;
  background: var(--bg-alt);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.15s;
  border: 1px solid var(--border);
}

.podcast-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.podcast-card a {
  text-decoration: none;
  color: inherit;
  display: flex;
  gap: 10px;
  padding: 10px;
  align-items: flex-start;
}

.podcast-card .podcast-favicon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
  background: white;
}

.podcast-card .podcast-card-body {
  min-width: 0;
}

.podcast-card .podcast-show {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--accent);
  margin-bottom: 3px;
}

.podcast-card .podcast-title {
  font-size: 13px;
  line-height: 1.4;
  color: var(--text);
}

.podcast-card .podcast-year {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 3px;
}

/* === PRESS MENTION CARDS (horizontal scroll with favicon) === */
.press-carousel {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 12px;
  -webkit-overflow-scrolling: touch;
}

.press-carousel::-webkit-scrollbar {
  height: 6px;
}

.press-carousel::-webkit-scrollbar-track {
  background: var(--bg-alt);
  border-radius: 3px;
}

.press-carousel::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.press-card {
  flex: 0 0 200px;
  scroll-snap-align: start;
  background: var(--bg-alt);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.15s;
}

.press-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.press-card a {
  text-decoration: none;
  color: inherit;
  display: flex;
  gap: 10px;
  padding: 10px;
  align-items: flex-start;
}

.press-card .press-favicon {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 2px;
}

.press-card .press-card-body {
  min-width: 0;
}

.press-card .press-outlet {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--accent);
  margin-bottom: 4px;
}

.press-card .press-title {
  font-size: 13px;
  line-height: 1.4;
  color: var(--text);
}

.press-card .press-year {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* === SHOW MORE BUTTON === */
.show-more-btn {
  display: inline-block;
  margin-top: 12px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-light);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.show-more-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* === CV SECTION === */
.cv-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s;
}

.cv-download:hover {
  background: var(--accent-light);
  text-decoration: none;
  color: #fff;
}

/* === FOOTER === */
footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  nav {
    position: fixed;
    left: 0;
    top: auto;
    bottom: 0;
    transform: none;
    flex-direction: row;
    width: 100%;
    border-radius: 0;
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.1);
    overflow-x: auto;
    padding: 8px 12px;
    gap: 2px;
  }

  nav a {
    font-size: 11px;
    padding: 4px 6px;
    flex-direction: column;
    gap: 3px;
  }

  .nav-dot {
    width: 6px;
    height: 6px;
  }

  main {
    padding: 0 16px 60px 16px;
  }
}

@media (max-width: 600px) {
  .about {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .about-photo {
    width: 120px;
    height: 120px;
  }

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

  section {
    padding: 32px 0 24px;
  }

  h2 {
    font-size: 20px;
  }

  .video-card {
    flex: 0 0 85%;
  }

  .pub-preview-card {
    flex: 0 0 80%;
  }
}