/* ===== CSS CUSTOM PROPERTIES & THEMING ===== */
:root {
  /* Light theme (default) */
  --bg-primary: #F7FAFC;
  --bg-secondary: #FFFFFF;
  --text-primary: #0F172A;
  --text-muted: #475569;
  --accent: #008F7A;
  --accent-subtle: #00BFA6;
  --border: #E2E8F0;
  --shadow: rgba(0, 143, 122, 0.1);
  --shadow-hover: rgba(0, 143, 122, 0.2);
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-academic: 'Inter', 'Source Sans 3', var(--font-family);
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  
  /* Layout */
  --max-width: 1100px;
  --border-radius: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-primary: #0E1116;
  --bg-secondary: #141A22;
  --text-primary: #E6F1FF;
  --text-muted: #9FB0C3;
  --accent: #00FFCC;
  --accent-subtle: #00BFA6;
  --border: #263341;
  --shadow: rgba(0, 255, 204, 0.1);
  --shadow-hover: rgba(0, 255, 204, 0.2);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .fade-in {
    opacity: 1 !important;
    transform: translateY(0) !important;
  }
  
  .fade-in.animate {
    opacity: 1 !important;
    transform: translateY(0) !important;
  }
  
  .academic-symbol {
    display: none !important;
  }
}

body {
  font-family: var(--font-academic);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 1rem;
  overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
  margin-bottom: var(--space-sm);
  color: var(--text-muted);
}

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

a:hover {
  color: var(--accent-subtle);
}

/* ===== UTILITY CLASSES ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xl) 0;
  scroll-margin-top: 100px; /* Account for fixed header */
}

.section--fullscreen {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
}

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--accent);
  color: var(--bg-primary);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn:hover {
  background: var(--accent-subtle);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-hover);
  color: var(--bg-primary);
}

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

.btn--secondary:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--shadow);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* ===== HEADER & NAVIGATION ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

[data-theme="dark"] .header {
  background: rgba(20, 26, 34, 0.95);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
}

.nav__list {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
  align-items: center;
}

.nav__link {
  color: var(--text-primary);
  font-weight: 500;
  position: relative;
  padding: var(--space-xs) 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__link.active {
  color: var(--accent);
}

.nav__link.active::after {
  width: 100%;
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

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

/* ===== HERO SECTION ===== */
.hero {
  min-height: calc(100vh - 80px); /* Full height minus header */
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px; /* Account for fixed header */
}

.hero__content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-lg) 0;
}

.hero__avatar {
  margin-bottom: var(--space-md);
  display: flex;
  justify-content: center;
}

.avatar-image {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent);
  box-shadow: 0 8px 32px var(--shadow);
  transition: var(--transition);
}

.avatar-image:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 40px var(--shadow-hover);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(0, 255, 204, 0.1) 0%, 
    rgba(0, 191, 166, 0.05) 50%, 
    rgba(0, 255, 204, 0.1) 100%);
  z-index: -1;
}

/* Academic Symbols Background Animation */
.academic-symbols {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  z-index: -1;
  pointer-events: none;
}

.academic-symbol {
  position: absolute;
  color: var(--accent);
  opacity: 0;
  font-size: 2rem;
  font-weight: 300;
  font-family: 'Times New Roman', serif;
  animation: floatUp 15s linear infinite;
  user-select: none;
}

.academic-symbol:nth-child(odd) {
  animation-duration: 20s;
  animation-delay: -5s;
}

.academic-symbol:nth-child(even) {
  animation-duration: 25s;
  animation-delay: -10s;
}

.academic-symbol:nth-child(3n) {
  animation-duration: 18s;
  animation-delay: -3s;
}

.academic-symbol:nth-child(4n) {
  animation-duration: 22s;
  animation-delay: -7s;
}

.academic-symbol:nth-child(5n) {
  animation-duration: 16s;
  animation-delay: -12s;
}

@keyframes floatUp {
  0% {
    opacity: 0;
    transform: translateY(100vh) rotate(0deg) scale(0.5);
  }
  10% {
    opacity: 0.3;
  }
  50% {
    opacity: 0.6;
    transform: translateY(50vh) rotate(180deg) scale(1);
  }
  90% {
    opacity: 0.3;
  }
  100% {
    opacity: 0;
    transform: translateY(-10vh) rotate(360deg) scale(0.5);
  }
}

/* Light theme adjustments */
[data-theme="light"] .academic-symbol {
  color: rgba(0, 143, 122, 0.3);
}

[data-theme="dark"] .academic-symbol {
  color: rgba(0, 255, 204, 0.3);
}

/* Fix glow animation for light mode */
[data-theme="light"] .btn:hover {
  box-shadow: 0 8px 25px rgba(0, 143, 122, 0.3);
}

[data-theme="dark"] .btn:hover {
  box-shadow: 0 8px 25px rgba(0, 255, 204, 0.3);
}

.hero__content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero__title {
  margin-bottom: var(--space-xs);
  background: linear-gradient(135deg, var(--accent), var(--accent-subtle));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  font-style: italic;
}

.hero__description {
  font-size: 1rem;
  margin-bottom: var(--space-md);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.stats {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-sm);
}

.stat {
  text-align: center;
  padding: var(--space-sm);
}

.stat__number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
}

.stat__label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ===== ABOUT SECTION ===== */
.about__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

@media (max-width: 768px) {
  .about__content {
    grid-template-columns: 1fr;
  }
}

.education {
  background: var(--bg-secondary);
  padding: var(--space-lg);
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
}

.education__item {
  margin-bottom: var(--space-md);
}

.education__degree {
  font-weight: 600;
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.education__institution {
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.education__details {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.research-interests {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.interest-chip {
  background: var(--accent);
  color: var(--bg-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* ===== LATEST UPDATES SECTION ===== */
.updates__grid {
  display: grid;
  gap: var(--space-lg);
}

.project-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--shadow);
}

.project__title {
  color: var(--accent);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.project__logo {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  object-fit: contain;
}

.project__description {
  margin-bottom: var(--space-md);
}

.project__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.badge {
  background: var(--bg-primary);
  color: var(--text-muted);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--border);
}

.project__actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ===== PUBLICATIONS SECTION ===== */
.publications__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-lg);
}

.publication-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
}

.publication-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--shadow);
}

.publication__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--bg-primary);
}

.publication__content {
  padding: var(--space-lg);
}

.publication__title {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.publication__venue {
  color: var(--accent);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.publication__note {
  font-size: 0.85rem;
  color: var(--accent);
  font-style: italic;
  margin-bottom: var(--space-xs);
  font-weight: 400;
}

.publication__authors {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-sm);
}

.publication__abstract {
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
}

.publication__actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ===== SKILLS SECTION ===== */
.skills__grid {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.skill-category {
  background: var(--bg-secondary);
  padding: var(--space-lg);
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
  flex: 1;
  min-width: 250px;
  max-width: 300px;
}

.skill-category__title {
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.skill-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.skill-item__name {
  font-weight: 500;
}

.skill-item__level {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-top: var(--space-xs);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-subtle));
  border-radius: 2px;
  transition: width 1s ease-out;
}

.progress-bar__fill--advanced { width: 90%; }
.progress-bar__fill--intermediate { width: 70%; }
.progress-bar__fill--beginner { width: 50%; }

/* ===== EXPERIENCE SECTION ===== */
.experience__timeline {
  position: relative;
  padding-left: var(--space-lg);
}

.experience__timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
}

.experience-item {
  position: relative;
  margin-bottom: var(--space-xl);
  padding-left: var(--space-lg);
}

.experience-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 0;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
}

.experience-item__title {
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.experience-item__company {
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.experience-item__period {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-sm);
}

.experience-item__description {
  color: var(--text-muted);
}

/* ===== CONTACT SECTION ===== */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

@media (max-width: 768px) {
  .contact__grid {
    grid-template-columns: 1fr;
  }
}

.contact-methods {
  display: grid;
  gap: var(--space-md);
}

.contact-method {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.contact-method:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow);
}

.contact-method__icon {
  width: 24px;
  height: 24px;
  color: var(--accent);
}

.contact-form {
  background: var(--bg-secondary);
  padding: var(--space-lg);
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 500;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-sm);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-family: inherit;
  transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--shadow);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: var(--space-lg) 0;
  text-align: center;
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

@media (max-width: 768px) {
  .footer__content {
    flex-direction: column;
  }
}

/* ===== ANIMATIONS & INTERACTIONS ===== */
.fade-in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.animate {
  opacity: 0;
  transform: translateY(20px);
}

.fade-in.animate.visible {
  opacity: 1;
  transform: translateY(0);
}

.scale-on-hover {
  transition: var(--transition);
}

.scale-on-hover:hover {
  transform: scale(1.02);
}

/* ===== RESPONSIVE DESIGN ===== */

/* Tablet and smaller desktop */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .section {
    padding: var(--space-lg) 0;
  }
  
  .section--fullscreen {
    min-height: auto;
    padding: var(--space-xl) 0;
  }
  
  .about__content {
    gap: var(--space-lg);
  }
  
  .publications__grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  .contact__grid {
    gap: var(--space-lg);
  }
}

/* Tablet portrait and mobile landscape */
@media (max-width: 768px) {
  .nav {
    padding: var(--space-xs) 0;
  }
  
  .nav__list {
    gap: var(--space-sm);
    font-size: 0.9rem;
  }
  
  .logo {
    font-size: 1.25rem;
  }
  
  .hero {
    padding-top: 80px;
    min-height: calc(100vh - 80px);
  }
  
  .hero__content {
    padding: var(--space-md) 0;
  }
  
  .hero__actions {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }
  
  .hero__actions .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
  
  .stats {
    gap: var(--space-sm);
    flex-wrap: wrap;
  }
  
  .stat {
    flex: 1 1 calc(50% - var(--space-sm));
    min-width: 120px;
  }
  
  .about__content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .updates__grid,
  .publications__grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  .project-card,
  .publication-card {
    padding: var(--space-md);
  }
  
  .publication__header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  
  .publication__pdf-btn {
    align-self: flex-start;
    width: 100%;
    justify-content: center;
  }
  
  .publication__title {
    font-size: 1rem;
  }
  
  .publication__abstract {
    font-size: 0.875rem;
  }
  
  .project__badges,
  .publication__actions {
    flex-wrap: wrap;
  }
  
  .skills__grid {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-md);
  }
  
  .skill-category {
    min-width: 100%;
    max-width: 100%;
  }
  
  .experience__timeline {
    padding-left: var(--space-md);
  }
  
  .experience-item {
    padding-left: var(--space-md);
  }
  
  .contact__grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .contact-form {
    padding: var(--space-md);
  }
}

/* Mobile portrait */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-sm);
  }
  
  .header {
    padding: 0 var(--space-sm);
  }
  
  .nav {
    flex-wrap: wrap;
    gap: var(--space-xs);
  }
  
  .nav__list {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
    font-size: 0.85rem;
  }
  
  .nav__link {
    padding: var(--space-xs);
  }
  
  .logo {
    font-size: 1.1rem;
  }
  
  .theme-toggle {
    padding: var(--space-xs);
  }
  
  .hero {
    padding-top: 120px;
    min-height: calc(100vh - 120px);
  }
  
  .hero__content {
    padding: var(--space-sm) 0;
  }
  
  .avatar-image {
    width: 140px;
    height: 140px;
  }
  
  .hero__title {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
    margin-bottom: var(--space-xs);
  }
  
  .hero__subtitle {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
  }
  
  .hero__description {
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
  }
  
  .hero__actions {
    gap: var(--space-xs);
  }
  
  .hero__actions .btn {
    width: 100%;
    padding: var(--space-sm);
    font-size: 0.9rem;
  }
  
  .stats {
    gap: var(--space-xs);
  }
  
  .stat {
    flex: 1 1 100%;
    padding: var(--space-xs);
  }
  
  .stat__number {
    font-size: 1.25rem;
  }
  
  .stat__label {
    font-size: 0.8rem;
  }
  
  .section {
    padding: var(--space-lg) 0;
    scroll-margin-top: 120px;
  }
  
  .section--fullscreen {
    min-height: auto;
    padding: var(--space-lg) 0;
  }
  
  h2 {
    font-size: clamp(1.5rem, 6vw, 2rem);
    margin-bottom: var(--space-md);
  }
  
  h3 {
    font-size: clamp(1.25rem, 5vw, 1.5rem);
  }
  
  .about__content {
    gap: var(--space-md);
  }
  
  .education {
    padding: var(--space-md);
  }
  
  .research-interests {
    gap: var(--space-xs);
  }
  
  .interest-chip {
    font-size: 0.8rem;
    padding: calc(var(--space-xs) / 2) var(--space-xs);
  }
  
  .project-card,
  .publication-card {
    padding: var(--space-md);
  }
  
  .project__title {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
  }
  
  .project__logo {
    width: 24px;
    height: 24px;
  }
  
  .project__description,
  .publication__abstract {
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
  }
  
  .publication__title {
    font-size: 0.95rem;
    line-height: 1.4;
  }
  
  .publication__venue {
    font-size: 0.85rem;
  }
  
  .publication__authors {
    font-size: 0.85rem;
  }
  
  .publication__note {
    font-size: 0.8rem;
  }
  
  .badge {
    font-size: 0.7rem;
    padding: calc(var(--space-xs) / 2) var(--space-xs);
  }
  
  .btn {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
  }
  
  .btn svg {
    width: 14px;
    height: 14px;
  }
  
  .publication__pdf-btn {
    width: 100%;
  }
  
  .skills__grid {
    gap: var(--space-sm);
  }
  
  .skill-category {
    padding: var(--space-md);
  }
  
  .skill-category__title {
    font-size: 1rem;
  }
  
  .experience__timeline {
    padding-left: var(--space-sm);
  }
  
  .experience-item {
    padding-left: var(--space-md);
    margin-bottom: var(--space-lg);
  }
  
  .experience-item__title {
    font-size: 1rem;
  }
  
  .experience-item__description {
    font-size: 0.875rem;
  }
  
  .contact-method {
    padding: var(--space-sm);
    flex-wrap: wrap;
  }
  
  .contact-method__icon {
    width: 20px;
    height: 20px;
  }
  
  .form-input,
  .form-textarea {
    padding: var(--space-sm);
    font-size: 0.9rem;
  }
  
  .footer__content {
    flex-direction: column;
    text-align: center;
    gap: var(--space-sm);
  }
}

/* ===== ACCESSIBILITY ===== */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--accent);
  color: var(--bg-primary);
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 1001;
}

.skip-link:focus {
  top: 6px;
}

.focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
  .header,
  .footer,
  .theme-toggle,
  .btn {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .section {
    page-break-inside: avoid;
  }
}