/* ===== VARIABLES ===== */
:root {
  --color-primary: #1B3A2D;
  --color-primary-dark: #0F2A1E;
  --color-primary-light: #E8F0EC;
  --color-accent: #8B6914;
  --color-accent-light: #F5EFE0;
  --color-text: #1C1C1C;
  --color-text-secondary: #3D3D3D;
  --color-text-light: #5A5A5A;
  --color-bg: #FAFAF8;
  --color-bg-alt: #F3F1ED;
  --color-border: #D8D4CC;
  --color-accent-dark: #9E7A1A;
  --color-footer-bg: #111210;
  --color-focus: #1B3A2D;
  --font-primary: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --max-width: 1200px;
  --header-height: 64px;
  --focus-ring: 0 0 0 3px rgba(27, 58, 45, 0.4);
  --bg-texture: url("data:image/svg+xml,%3Csvg width='4' height='4' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='2' cy='2' r='0.4' fill='%23000' fill-opacity='0.02'/%3E%3C/svg%3E");
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* ===== ACCESSIBILITY ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  background: var(--color-primary);
  color: white;
  font-weight: 500;
  border-radius: 0 0 4px 4px;
  z-index: 10000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: none;
}

/* Focus styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* Remove outline for mouse users */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Scroll-triggered reveal */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
  transition-delay: calc(var(--card-index, 0) * 0.08s);
}

/* ===== UTILITIES ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 600;
  margin-bottom: 40px;
  color: var(--color-text);
  position: relative;
  padding-bottom: 20px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 2.5px;
  background: var(--color-accent);
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(250, 250, 248, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
}

.nav-menu {
  display: flex;
  gap: 40px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color 0.2s ease;
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
}

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

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all 0.3s ease;
}

/* ===== MAIN ===== */
.main {
  margin-top: var(--header-height);
}

/* ===== HERO SECTION ===== */
.hero {
  padding: 100px 0 80px;
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(139, 105, 20, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  align-items: start;
  position: relative;
}

.hero-image {
  position: relative;
  animation: scaleIn 0.7s ease-out 0.1s both;
}

.hero-photo {
  width: 100%;
  max-width: 300px;
  aspect-ratio: 3/4;
  object-fit: cover;
  border-radius: 4px;
  background: var(--color-border);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
  filter: grayscale(15%);
}

.hero-info h1 {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  color: var(--color-text);
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-title {
  font-size: 1.25rem;
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: 8px;
  animation: fadeInUp 0.6s ease-out 0.35s both;
}

.hero-location {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
  animation: fadeInUp 0.5s ease-out 0.45s both;
}

.hero-description {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 65ch;
  animation: fadeIn 0.6s ease-out 0.55s both;
}

.hero-contact {
  display: flex;
  gap: 16px;
  animation: fadeInUp 0.5s ease-out 0.65s both;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ===== EXPERTISE SECTION ===== */
.expertise {
  background: var(--color-bg);
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2px;
  counter-reset: expertise;
}

.expertise-card {
  position: relative;
  overflow: hidden;
  padding: 32px;
  background: var(--color-bg-alt);
  counter-increment: expertise;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.expertise-card::before {
  content: counter(expertise, decimal-leading-zero);
  position: absolute;
  top: -4px;
  right: 12px;
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.08;
  line-height: 1;
  pointer-events: none;
}

.expertise-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.expertise-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-text);
}

.expertise-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== EDUCATION SECTION ===== */
.education {
  background: var(--color-bg-alt);
  background-image: var(--bg-texture);
}

.education-list {
  display: flex;
  flex-direction: column;
}

.education-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.education-icon {
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* SVG icon for education */
.education-icon svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.education-content h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.education-content p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.education-content .degree {
  color: var(--color-accent);
  font-weight: 500;
}

/* ===== EXPERIENCE SECTION ===== */
.experience {
  background: var(--color-bg);
}

.experience-list {
  position: relative;
  display: flex;
  flex-direction: column;
}

.experience-list::before {
  content: '';
  position: absolute;
  left: 135px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.experience-item {
  position: relative;
  display: flex;
  gap: 32px;
  padding: 0 0 40px 0;
}

.experience-item:last-child {
  padding-bottom: 0;
}

.experience-item::before {
  content: '';
  position: absolute;
  left: 130px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  z-index: 1;
}

.experience-period {
  flex-shrink: 0;
  width: 120px;
  text-align: right;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-light);
  padding-top: 2px;
}

.experience-content {
  flex: 1;
  padding-left: 16px;
}

.experience-item h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.experience-item .company {
  font-size: 1rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-bottom: 8px;
}

.experience-item .company a {
  color: var(--color-primary);
}

.experience-item .company a:hover {
  text-decoration: underline;
}

.experience-item p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===== ABOUT PAGE ===== */
.bio-content {
  max-width: 800px;
}

.bio-content p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

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

/* ===== PAGE HEADER ===== */
.page-header {
  padding: 60px 0;
  background: var(--color-primary);
  border-bottom: none;
  color: white;
}

.page-header h1 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: white;
}

.page-header p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 700px;
}

/* ===== PUBLICATIONS PAGE ===== */
.publications-section {
  padding: 60px 0;
}

.publications-download {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
  padding: 16px 20px;
  background: var(--color-accent-light);
  border-radius: 4px;
}

.publications-download p {
  margin: 0;
  font-weight: 500;
}

.author-ids {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 40px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.author-ids a {
  color: var(--color-accent);
  transition: color 0.2s ease;
}

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

.author-ids .separator {
  color: var(--color-border);
}

.publications-category {
  margin-bottom: 60px;
}

.publications-category:last-child {
  margin-bottom: 0;
}

.publications-category h2,
.library-category h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

.publication-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.publication-item {
  padding: 24px;
  background: var(--color-bg-alt);
  border-radius: 4px;
  border-left: 3px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.publication-item:hover {
  border-left-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.publication-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}

.publication-item h3 a {
  color: var(--color-text);
  transition: color 0.2s ease;
}

.publication-item h3 a:hover {
  color: var(--color-primary);
}

.publication-meta {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.publication-authors {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-style: italic;
}

.publication-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.2s ease;
  text-decoration: none;
}

.btn-action:hover {
  background: var(--color-primary-dark);
}

.bibtex-toggle,
.biblatex-toggle {
  background: var(--color-bg);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.bibtex-toggle:hover,
.biblatex-toggle:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.bibtex-snippet,
.biblatex-snippet {
  margin-top: 16px;
  padding: 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.bibtex-snippet pre,
.biblatex-snippet pre {
  margin: 0;
  padding: 12px;
  background: var(--color-bg-alt);
  border-radius: 4px;
  overflow-x: auto;
  font-size: 0.8rem;
  line-height: 1.5;
}

.bibtex-snippet code,
.biblatex-snippet code {
  font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
  white-space: pre-wrap;
  word-break: break-word;
}

.bibtex-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-copy:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-copy.copied {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* ===== LIBRARY PAGE ===== */
.library-intro {
  padding: 40px 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.library-intro p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 800px;
  line-height: 1.8;
}

.library-section {
  padding: 60px 0;
  background-image: var(--bg-texture);
}

.library-category {
  margin-bottom: 60px;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.book-card {
  padding: 24px;
  background: var(--color-bg-alt);
  border-radius: 4px;
  border-top: 3px solid var(--color-accent);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.book-card .book-number {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.book-card h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}

.book-card .book-author {
  font-size: 0.9rem;
  color: var(--color-accent);
  font-style: italic;
  margin-bottom: 12px;
}

.book-card .book-description {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.book-card--placeholder {
  border: 2px dashed var(--color-border);
  background: transparent;
}

/* ===== CTA SECTION ===== */
.cta-section {
  padding: 80px 0;
  background: var(--color-primary);
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(255, 255, 255, 0.06) 0%, transparent 70%),
              radial-gradient(ellipse at 80% 50%, rgba(139, 105, 20, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 16px;
  position: relative;
}

.cta-section p {
  font-size: 1.1rem;
  font-weight: 300;
  opacity: 0.9;
  margin-bottom: 32px;
  position: relative;
}

.cta-section .btn {
  background: var(--color-accent);
  color: white;
  position: relative;
}

.cta-section .btn:hover {
  background: var(--color-accent-dark);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--color-footer-bg);
  color: white;
  padding: 60px 0 24px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: start;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 24px;
}

.footer-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.footer-title {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  opacity: 0.7;
}

.footer-contact {
  font-size: 0.95rem;
  opacity: 0.7;
}

.footer-bottom {
  font-size: 0.85rem;
  opacity: 0.5;
}

/* ===== ANIMATED LINK UNDERLINES ===== */
.experience-item .company a,
.publication-item h3 a,
.author-ids a,
.bio-content a,
.library-intro a {
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 0% 100%;
  background-repeat: no-repeat;
  background-size: 0% 1px;
  transition: background-size 0.3s ease, color 0.2s ease;
  padding-bottom: 1px;
}

.experience-item .company a:hover,
.publication-item h3 a:hover,
.author-ids a:hover,
.bio-content a:hover,
.library-intro a:hover {
  background-size: 100% 1px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 968px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-image {
    order: -1;
  }

  .hero-photo {
    max-width: 200px;
    margin: 0 auto;
  }

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

  .hero-info h1 {
    font-size: 2.75rem;
  }

  .hero-title {
    font-size: 1.1rem;
  }

  .hero-contact {
    justify-content: center;
  }

  .section-title {
    font-size: 1.875rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(250, 250, 248, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .hero {
    padding: 80px 0 60px;
  }

  .hero-info h1 {
    font-size: 2.25rem;
  }

  .hero-contact {
    flex-wrap: wrap;
    gap: 12px;
  }

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

  .page-header p {
    font-size: 1rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 24px;
  }

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

  .education-item {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .education-icon {
    margin: 0 auto;
  }

  /* Timeline collapse: revert to card layout */
  .experience-list::before {
    display: none;
  }

  .experience-item::before {
    display: none;
  }

  .experience-item {
    flex-direction: column;
    gap: 8px;
    padding: 24px;
    background: var(--color-bg-alt);
    border-radius: 4px;
    margin-bottom: 16px;
  }

  .experience-item:last-child {
    margin-bottom: 0;
  }

  .experience-period {
    width: auto;
    text-align: left;
  }

  .experience-content {
    padding-left: 0;
  }
}

/* Very small phones */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 60px 0 40px;
  }

  .hero-photo {
    max-width: 160px;
  }

  .hero-info h1 {
    font-size: 1.875rem;
  }

  .hero-title {
    font-size: 1rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .section {
    padding: 40px 0;
  }

  .section-title {
    font-size: 1.5rem;
    margin-bottom: 24px;
  }

  .btn {
    padding: 10px 18px;
    font-size: 0.85rem;
  }

  .expertise-card {
    padding: 24px;
  }

  .publication-item {
    padding: 16px;
  }

  .page-header {
    padding: 40px 0;
  }

  .page-header h1 {
    font-size: 1.75rem;
  }

  .cta-section {
    padding: 60px 0;
  }

  .cta-section h2 {
    font-size: 1.5rem;
  }
}