/* CSS Custom Properties (Variables) */
:root {
  /* Light theme colors */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --accent-color: #f59e0b;
  --background-color: #ffffff;
  --background-secondary: #f8fafc;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --card-background: #ffffff;
  --shadow-small: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* Dark theme */
[data-theme="dark"] {
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --secondary-color: #94a3b8;
  --accent-color: #fbbf24;
  --background-color: #0f172a;
  --background-secondary: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border-color: #334155;
  --card-background: #1e293b;
  --shadow-small: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Container */
.container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all var(--transition-normal);
}

[data-theme="dark"] .nav {
  background-color: rgba(15, 23, 42, 0.9);
}

.nav-container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-brand .nav-name {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
  position: relative;
  width: 40px;
  height: 40px;
}

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

.theme-toggle .sun-icon,
.theme-toggle .moon-icon {
  position: absolute;
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
  transition: all var(--transition-normal);
}

.theme-toggle .moon-icon {
  opacity: 0;
  transform: rotate(90deg);
}

[data-theme="dark"] .theme-toggle .sun-icon {
  opacity: 0;
  transform: rotate(-90deg);
}

[data-theme="dark"] .theme-toggle .moon-icon {
  opacity: 1;
  transform: rotate(0deg);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
}

.mobile-menu-toggle span {
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all var(--transition-fast);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  padding-bottom: var(--spacing-20);
  background: linear-gradient(135deg, var(--background-color) 0%, var(--background-secondary) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-16);
  align-items: center;
}

.hero-text {
  max-width: 800px;
}

.hero-greeting {
  display: block;
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2);
}

.hero-name {
  display: block;
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-top: var(--spacing-1);
  margin-bottom: var(--spacing-4);
}

.hero-subtitle {
  font-size: var(--font-size-2xl);
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: var(--spacing-6);
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-3);
  line-height: 1.7;
  animation: fadeInUp 0.6s ease-out 0.6s both;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-8);
  animation: fadeInUp 0.6s ease-out 0.8s both;
}

.hero-social {
  display: flex;
  gap: var(--spacing-4);
  animation: fadeInUp 0.6s ease-out 1s both;
}

.hero-image {
  animation: fadeInRight 0.8s ease-out 0.4s both;
}

.image-container {
  position: relative;
  width: 280px;
  height: 280px;
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-full);
  border: 4px solid var(--primary-color);
  transition: transform var(--transition-normal);
  box-shadow: var(--shadow-large);
}

/* Profile Image Flip Effect */
.flip-container {
  background-color: transparent;
  perspective: 1000px;
  will-change: transform;
}

.flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.8s ease-in-out;
  transform-style: preserve-3d;
  will-change: transform;
}

.flip-container:hover .flip-inner {
  transform: rotateY(180deg);
}

.flip-front, .flip-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  top: 0;
  left: 0;
  border-radius: var(--radius-full);
  overflow: hidden;
}

.flip-back {
  transform: rotateY(180deg);
  overflow: hidden;
}

.flip-front {
  border: 4px solid var(--primary-color);
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  border-radius: var(--radius-full);
  border: 4px solid var(--primary-color);
  transition: none;
  box-shadow: var(--shadow-large);
  display: block;
  max-width: 100%;
}

/* Enlarge the outdoor portrait and place the face near the upper third. */
.outdoor-front {
  border: 4px solid var(--primary-color);
}

.profile-image.outdoor-photo {
  width: 130%;
  height: 130%;
  max-width: none;
  margin-left: -15%;
  margin-top: -17%;
  border: none;
  border-radius: 0;
}

.profile-image.sue-photo {
  width: 98%;
  height: 98%;
  margin: 1%;
  object-position: 40% 46%;
}

/* Specific positioning for the formal suit photo */
.profile-image.formal-suit {
  object-position: center -10%;
  width: 115%;
  height: 115%;
  max-width: none;
  margin-left: -7.5%;
  margin-top: -7.5%;
  border: none;
}

.flip-back {
  border: 4px solid var(--primary-color);
}

/* Inline Links */
.inline-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
  border-bottom: 2px solid transparent;
}

.inline-link:hover {
  color: var(--primary-hover);
  border-bottom-color: var(--primary-color);
}

/* Blue Highlights */
.highlight-blue {
  color: var(--primary-color);
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  font-size: var(--font-size-base);
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.btn-outline {
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  background-color: transparent;
}

.btn-outline:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

/* Social Links */
.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background-color: var(--background-secondary);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

/* Sections */
.section {
  padding: var(--spacing-12) 0;
}

.section:nth-child(even) {
  background-color: var(--background-secondary);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-10);
  color: var(--text-primary);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -var(--spacing-4);
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--primary-color);
  border-radius: var(--radius-full);
}

/* Research Section */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-8);
}

.research-card {
  background-color: var(--card-background);
  padding: var(--spacing-5);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-small);
  transition: all var(--transition-normal);
  border: 1px solid var(--border-color);
}

.research-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-medium);
}

.research-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  background-color: var(--primary-color);
  color: white;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-3);
}

.research-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-3);
  color: var(--text-primary);
}

.research-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.publications-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-8);
  color: var(--text-primary);
  text-align: center;
}

.publication-item {
  background-color: var(--card-background);
  padding: var(--spacing-8);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-small);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-6);
  transition: all var(--transition-fast);
  margin-bottom: var(--spacing-8);
}

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

.publication-item:hover {
  box-shadow: var(--shadow-large);
  transform: translateX(4px);
  border-left-color: var(--accent-color);
}

.publication-item h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-2);
  color: var(--text-primary);
}

.publication-meta {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-2);
}

.publication-description {
  color: var(--text-secondary);
}

.publication-title-link {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.publication-title-link:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

.publication-link {
  color: var(--primary-color);
  text-decoration: none;
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.publication-link:hover {
  background-color: var(--background-secondary);
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-10);
  padding-left: var(--spacing-16);
}

.timeline-marker {
  position: absolute;
  left: 22px;
  top: 0;
  width: 16px;
  height: 16px;
  background-color: var(--primary-color);
  border-radius: var(--radius-full);
  border: 4px solid var(--background-color);
  z-index: 1;
}

.timeline-content {
  background-color: var(--card-background);
  padding: var(--spacing-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-small);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.timeline-content:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-2px);
}

.timeline-content h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-2);
  color: var(--text-primary);
}

.timeline-company {
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: var(--spacing-1);
}

.timeline-date {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-3);
}

.timeline-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Education Section */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-8);
}

.education-card {
  background-color: var(--card-background);
  padding: var(--spacing-8);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.education-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-large);
}

.education-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-4);
  gap: var(--spacing-4);
}

.education-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.education-gpa {
  background-color: var(--primary-color);
  color: white;
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  white-space: nowrap;
}

.education-awards {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.award-badge {
  background-color: var(--accent-color);
  color: white;
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-align: center;
}

.education-school {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--primary-color);
  margin-bottom: var(--spacing-1);
}

.education-date {
  color: var(--text-muted);
  margin-bottom: var(--spacing-6);
}

.education-details {
  color: var(--text-secondary);
  line-height: 1.6;
}

.education-details p {
  margin-bottom: var(--spacing-3);
}

/* Contact Section */
.contact-intro {
  text-align: center;
  margin-bottom: var(--spacing-12);
}

.contact-intro p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
}

.contact-content {
  max-width: 800px;
  margin: 0 auto;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-12);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  padding: var(--spacing-6);
  background-color: var(--card-background);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-small);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.contact-item:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-2px);
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: white;
  border-radius: var(--radius-lg);
  flex-shrink: 0;
}

.contact-details h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-1);
  color: var(--text-primary);
}

.contact-details a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.contact-cta {
  text-align: center;
  padding: var(--spacing-8);
  background-color: var(--card-background);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
}

.contact-cta p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-6);
}

/* Footer */
.footer {
  background-color: var(--background-secondary);
  padding: var(--spacing-8) 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.footer p {
  color: var(--text-muted);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: #1e40af;
    border-bottom: none;
    padding: var(--spacing-6);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-4);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    box-shadow: var(--shadow-medium);
    max-height: calc(100vh - 70px);
    overflow-y: auto;
  }
  
  .nav-links.mobile-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .mobile-menu-toggle {
    display: flex;
    z-index: 1001;
  }
  
  body.menu-open {
    overflow: hidden;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-4);
  }

  .hero-image {
    order: -1;
    margin-top: var(--spacing-2);
    margin-bottom: var(--spacing-2);
  }

  .hero-name {
    font-size: var(--font-size-4xl);
    margin-top: var(--spacing-4);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-xl);
  }
  
  .hero-buttons {
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .image-container {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    position: relative;
  }
  
  /* Disable flip on mobile, use tap instead */
  .flip-container:hover .flip-inner {
    transform: none;
  }
  
  .flip-container:active .flip-inner,
  .flip-container:focus .flip-inner {
    transform: rotateY(180deg);
  }
  
  .section {
    padding: var(--spacing-12) 0;
  }
  
  .section-title {
    font-size: var(--font-size-3xl);
  }
  
  .research-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .timeline {
    padding-left: 0;
  }
  
  .timeline::before {
    left: 15px;
  }
  
  .timeline-item {
    padding-left: var(--spacing-10);
  }
  
  .timeline-marker {
    left: 7px;
  }
  
  .education-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .education-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .contact-info {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }

  .contact-item {
    padding: var(--spacing-4);
    gap: var(--spacing-3);
  }

  .contact-icon {
    width: 40px;
    height: 40px;
  }

  .contact-details a {
    word-break: break-word;
  }
  
  .container {
    padding: 0 var(--spacing-4);
  }
}

@media (max-width: 480px) {
  .hero-name {
    font-size: var(--font-size-3xl);
  }
  
  .hero-description {
    font-size: var(--font-size-base);
  }
  
  .btn {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
  }
  
  .image-container {
    width: 180px;
    height: 180px;
  }
}

/* === Hero: principles box, link styles, social-icon row, photo offset === */
.principles-box {
  border: 1px solid color-mix(in srgb, #2dd4bf 55%, transparent);
  border-left: 3px solid #2dd4bf;
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  margin: var(--spacing-4) 0 var(--spacing-5) 0;
  background: color-mix(in srgb, #2dd4bf 10%, transparent);
  animation: fadeInUp 0.6s ease-out 0.6s both;
}

.principles-box-title {
  font-weight: 600;
  font-size: var(--font-size-lg);
  margin: 0 0 var(--spacing-4) 0;
  color: var(--text-primary);
}

.principle-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-3);
}

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

.principle-item p {
  margin: 0;
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-secondary);
}

.principle-emphasis {
  font-weight: 600;
  color: var(--text-primary) !important;
}

.principle-marker {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-full);
  background: #2dd4bf;
  color: #0f766e;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
}

.bold-link {
  color: var(--primary-color);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all var(--transition-fast);
}

.bold-link:hover {
  color: var(--primary-hover);
  border-bottom-color: var(--primary-color);
}

.amor-link {
  color: var(--primary-color);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all var(--transition-fast);
}

.amor-link:hover {
  color: #e11d48;
  border-bottom-color: #e11d48;
}

.amor-link:hover::after {
  content: " \2665";
}

.casual-link {
  color: var(--primary-color);
  font-weight: 400;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all var(--transition-fast);
}

.casual-link:hover {
  color: var(--primary-hover);
  border-bottom-color: var(--primary-color);
}

.text-link {
  color: inherit;
  font-weight: 400;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.text-link:hover {
  text-decoration: underline;
}

.hero-subtitle-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
  flex-wrap: wrap;
}

.hero-subtitle-row .hero-subtitle {
  margin-bottom: 0;
}

.hero-subtitle-row .hero-social {
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

/* Desktop only -- mobile keeps its own hero-image spacing */
@media (min-width: 769px) {
  .hero-content {
    align-items: start;
  }

  .hero-image {
    margin-top: 8.15rem;
  }
}

.work-para {
  margin-bottom: var(--spacing-10);
}

.gloss {
  font-style: italic;
  font-size: var(--font-size-base);
  color: var(--text-muted);
}

/* AMOR turns red with a heart when its publication card or title is hovered */
.amor-word {
  transition: color var(--transition-fast);
}

.publication-item:hover .amor-word {
  color: #e11d48;
}

.publication-item:hover .amor-word::after {
  content: " \2665";
}

/* Nav bar -- darker blue with white text */
.nav {
  background-color: #1e40af;
  border-bottom: none;
}

[data-theme="dark"] .nav {
  background-color: #1e40af;
}

.nav-brand .nav-name {
  color: #fff;
}

.nav-link {
  color: #fff;
}

.nav-link:hover {
  color: #fff;
}

.nav-link::after {
  background-color: #fff;
}

.theme-toggle .sun-icon,
.theme-toggle .moon-icon {
  color: #fff;
}

.theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

.mobile-menu-toggle span {
  background-color: #fff;
}

/* Center "AI Researcher" + social icons on mobile */
@media (max-width: 768px) {
  .hero-subtitle-row {
    justify-content: center;
  }
}