/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors */
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --secondary-color: #10b981;
  --accent-color: #f59e0b;
  --dark-bg: #0f172a;
  --dark-card: #1e293b;
  --light-bg: #f8fafc;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --border-color: #e2e8f0;
  
  /* Spacing */
  --section-padding: 100px 0;
  --container-max-width: 1200px;
  
  /* Typography */
  --font-primary: 'Inter', 'Noto Sans KR', sans-serif;
  --font-secondary: 'Noto Sans KR', sans-serif;
}

html {
  scroll-behavior: smooth;
}

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

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: white;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.logo-img {
  height: 45px;
  width: auto;
  border-radius: 8px;
  object-fit: contain;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  color: white;
}

.logo-aion {
  color: var(--primary-light);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-light);
  transition: width 0.3s;
}

.nav-menu a:hover {
  color: var(--primary-light);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: white;
  transition: 0.3s;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background-image: 
    linear-gradient(135deg, rgba(37, 99, 235, 0.9) 0%, rgba(30, 64, 175, 0.95) 100%),
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800"><defs><linearGradient id="grad1" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" style="stop-color:rgb(37,99,235);stop-opacity:0.1" /><stop offset="100%" style="stop-color:rgb(30,64,175);stop-opacity:0.1" /></linearGradient></defs><rect width="1200" height="800" fill="url(%23grad1)"/><g fill="rgba(255,255,255,0.05)"><circle cx="100" cy="100" r="80"/><circle cx="300" cy="200" r="60"/><circle cx="800" cy="150" r="100"/><circle cx="1000" cy="400" r="70"/><circle cx="400" cy="600" r="90"/><circle cx="900" cy="650" r="80"/></g></svg>');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.3) 0%, transparent 50%);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.8; }
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.3) 0%, rgba(15, 23, 42, 0.6) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: white;
  padding-top: 80px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  margin-bottom: 1rem;
  line-height: 1.2;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.title-line {
  display: block;
  animation: fadeInUp 1s ease-out backwards;
}

.title-line:nth-child(1) { animation-delay: 0.2s; }
.title-line:nth-child(2) { animation-delay: 0.4s; }
.title-line:nth-child(3) { animation-delay: 0.6s; }

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

.hero-subtitle {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--accent-color);
  animation: fadeInUp 1s ease-out 0.8s backwards;
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  margin-bottom: 2.5rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: rgba(255, 255, 255, 0.95);
  animation: fadeInUp 1s ease-out 1s backwards;
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 3rem 0;
  animation: fadeInUp 1s ease-out 1.2s backwards;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.stat-item i {
  font-size: 2.5rem;
  color: var(--accent-color);
}

.stat-item span {
  font-size: 1.1rem;
  font-weight: 600;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  animation: fadeInUp 1s ease-out 1.4s backwards;
  flex-wrap: wrap;
}

.btn {
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
  display: inline-block;
  font-size: 1.1rem;
}

.btn-primary {
  background: var(--accent-color);
  color: white;
  box-shadow: 0 10px 30px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
  background: #d97706;
  transform: translateY(-2px);
  box-shadow: 0 15px 40px rgba(245, 158, 11, 0.4);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid white;
}

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

.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
  color: white;
  font-size: 2rem;
  cursor: pointer;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* Section Styles */
.section {
  padding: var(--section-padding);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 4rem;
  color: var(--text-primary);
  position: relative;
  padding-bottom: 1rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
}

/* About Section */
.about-section {
  background: white;
}

.about-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 20px;
  padding: 3rem;
  color: white;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.about-header {
  display: flex;
  gap: 2rem;
  margin-bottom: 2.5rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  flex-shrink: 0;
  border: 4px solid rgba(255, 255, 255, 0.3);
}

.about-info h3 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.role {
  font-size: 1.3rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
  font-weight: 600;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1rem;
}

.contact-info p {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 1.05rem;
}

.contact-info i {
  width: 20px;
  color: var(--accent-color);
}

.about-details {
  background: rgba(255, 255, 255, 0.1);
  padding: 2rem;
  border-radius: 15px;
  backdrop-filter: blur(10px);
}

.intro {
  font-size: 1.15rem;
  margin-bottom: 2rem;
  line-height: 1.8;
}

.highlights {
  list-style: none;
  margin-bottom: 2rem;
}

.highlights li {
  padding: 0.8rem 0;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.highlights li:last-child {
  border-bottom: none;
}

.highlights i {
  color: var(--secondary-color);
  font-size: 1.2rem;
  margin-top: 0.2rem;
  flex-shrink: 0;
}

.work-preference {
  background: rgba(245, 158, 11, 0.2);
  padding: 1.5rem;
  border-radius: 10px;
  border-left: 4px solid var(--accent-color);
}

.work-preference h4 {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.work-preference i {
  color: var(--accent-color);
}

/* Expertise Section */
.expertise-section {
  background: var(--light-bg);
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.expertise-card {
  background: white;
  padding: 2.5rem;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: all 0.3s;
  border-top: 4px solid var(--primary-color);
}

.expertise-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.expertise-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 2rem;
  color: white;
}

.expertise-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
  color: var(--text-primary);
}

.expertise-card ul {
  list-style: none;
}

.expertise-card li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  padding-left: 1.5rem;
  position: relative;
}

.expertise-card li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

/* Experience Section */
.experience-section {
  background: white;
}

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
}

.timeline-item {
  position: relative;
  padding-left: 50px;
  margin-bottom: 3rem;
}

.timeline-dot {
  position: absolute;
  left: -8px;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  border: 4px solid white;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.timeline-content {
  background: var(--light-bg);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  transition: all 0.3s;
}

.timeline-content:hover {
  transform: translateX(10px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.timeline-date {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}

.timeline-content h3 {
  font-size: 1.5rem;
  margin-bottom: 0.3rem;
  color: var(--text-primary);
}

.timeline-content h4 {
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.timeline-content ul {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.timeline-content li {
  margin-bottom: 0.5rem;
  padding-left: 1.5rem;
  position: relative;
}

.timeline-content li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tech-tags span {
  background: var(--primary-color);
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* Projects Section */
.projects-section {
  background: var(--light-bg);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: white;
  padding: 2.5rem;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: all 0.3s;
  position: relative;
  border-left: 4px solid var(--primary-color);
}

.project-card.featured {
  border-left-color: var(--accent-color);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.05), rgba(37, 99, 235, 0.05));
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.project-label {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--accent-color);
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.project-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-period {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.project-desc {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.project-tech span {
  background: var(--light-bg);
  color: var(--primary-color);
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
}

.project-funding {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.project-funding i {
  color: var(--accent-color);
}

/* Patents Section */
.patents-section {
  background: white;
}

.patents-summary {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-bottom: 4rem;
  flex-wrap: wrap;
}

.patent-stat {
  text-align: center;
}

.stat-number {
  font-size: 4rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.patents-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.patent-card {
  background: var(--light-bg);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  transition: all 0.3s;
  position: relative;
  border-top: 4px solid var(--primary-color);
}

.patent-card.applied {
  border-top-color: var(--secondary-color);
}

.patent-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.patent-status {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  color: white;
}

.patent-card.registered .patent-status {
  background: var(--primary-color);
}

.patent-card.applied .patent-status {
  background: var(--secondary-color);
}

.patent-card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  line-height: 1.4;
  padding-right: 60px;
}

.patent-number {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
}

.patent-date {
  color: var(--primary-color);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.patent-desc {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 0.95rem;
}

.publications {
  background: var(--light-bg);
  padding: 3rem;
  border-radius: 20px;
}

.subsection-title {
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.publication-list {
  list-style: none;
}

.publication-list li {
  padding: 1.5rem;
  margin-bottom: 1rem;
  background: white;
  border-radius: 10px;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: all 0.3s;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.publication-list li:hover {
  transform: translateX(10px);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.publication-list i {
  color: var(--primary-color);
  font-size: 1.3rem;
  margin-top: 0.2rem;
  flex-shrink: 0;
}

.publication-list span {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Contact Section */
.contact-section {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.contact-section .section-title {
  color: white;
}

.contact-section .section-title::after {
  background: linear-gradient(90deg, var(--accent-color), white);
}

.contact-info-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 3rem;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.contact-info-card h3 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.contact-intro {
  font-size: 1.15rem;
  margin-bottom: 3rem;
  line-height: 1.8;
}

.contact-methods {
  display: grid;
  gap: 2rem;
  margin-bottom: 3rem;
}

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  transition: all 0.3s;
}

.contact-method:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateX(10px);
}

.method-icon {
  width: 60px;
  height: 60px;
  background: var(--accent-color);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  flex-shrink: 0;
}

.method-details h4 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.method-details a {
  color: white;
  text-decoration: none;
  font-size: 1.05rem;
  transition: color 0.3s;
}

.method-details a:hover {
  color: var(--accent-color);
}

.method-details p {
  font-size: 1.05rem;
}

.expertise-summary {
  padding: 2rem;
  background: rgba(245, 158, 11, 0.2);
  border-radius: 15px;
  border-left: 4px solid var(--accent-color);
}

.expertise-summary h4 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.expertise-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.expertise-tags span {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.6rem 1.2rem;
  border-radius: 25px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.3s;
}

.expertise-tags span:hover {
  background: var(--accent-color);
  transform: translateY(-2px);
}

/* Footer */
.footer {
  background: var(--dark-bg);
  color: white;
  padding: 3rem 0;
  text-align: center;
}

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

.footer-logo {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.footer-logo-img {
  height: 50px;
  width: auto;
  border-radius: 8px;
  object-fit: contain;
}

.logo-aion-footer {
  color: var(--primary-light);
}

.footer-text {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-links a {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  transition: all 0.3s;
}

.footer-links a:hover {
  background: var(--primary-color);
  transform: translateY(-5px);
}

.copyright {
  color: var(--text-light);
  font-size: 0.9rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: var(--dark-bg);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.3);
    padding: 2rem 0;
    gap: 1rem;
  }

  .nav-menu.active {
    left: 0;
  }

  .hamburger {
    display: flex;
  }

  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }

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

  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 1rem;
  }

  .about-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .contact-info {
    align-items: center;
  }

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

  .timeline::before {
    left: 10px;
  }

  .timeline-item {
    padding-left: 40px;
  }

  .timeline-dot {
    left: 2px;
  }

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

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

  .patents-summary {
    gap: 2rem;
  }

  .contact-info-card {
    padding: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.3rem;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .about-card {
    padding: 2rem;
  }

  .avatar {
    width: 100px;
    height: 100px;
    font-size: 3rem;
  }
}