/* Modern Dark Theme Variables */
:root {
  /* Dark Theme Colors */
  --bg-primary: #0a0a0b;
  --bg-secondary: #111114;
  --bg-tertiary: #1a1a1d;
  --bg-card: #161618;
  --bg-glass: rgba(22, 22, 24, 0.85);
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #b8b8b8;
  --text-muted: #888888;
  
  /* Accent Colors */
  --accent-primary: #4f46e5;
  --accent-secondary: #7c3aed;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --accent-glow: 0 0 20px rgba(79, 70, 229, 0.3);
  
  /* Enhanced Gradients */
  --bg-gradient-primary: radial-gradient(ellipse at center, rgba(79, 70, 229, 0.15) 0%, transparent 70%);
  --bg-gradient-secondary: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
  --card-gradient: linear-gradient(135deg, rgba(79, 70, 229, 0.08) 0%, rgba(124, 58, 237, 0.08) 100%);
  
  /* Border Colors */
  --border-primary: #2a2a2d;
  --border-secondary: #3a3a3d;
  --border-accent: rgba(79, 70, 229, 0.3);
  
  /* Font Families */
  --font-primary: 'Inter', sans-serif;
  --font-serif: 'Playfair Display', serif;
  
  /* Responsive Spacing */
  --container-max-width: min(1200px, 95vw);
  --container-padding: clamp(15px, 4vw, 40px);
  --section-padding: clamp(20px, 5vw, 60px);
  --border-radius: 12px;
  --border-radius-lg: 16px;
  
  /* Responsive Typography */
  --font-size-xs: clamp(0.75rem, 2vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 2.5vw, 1rem);
  --font-size-base: clamp(1rem, 3vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 3.5vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 4vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 5vw, 2rem);
  --font-size-3xl: clamp(2rem, 6vw, 3rem);
  --font-size-4xl: clamp(2.5rem, 8vw, 4rem);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Shadows */
  --shadow-small: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.25);
  --shadow-large: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* Reset and Base Styles */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  background-image: var(--bg-gradient-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  font-size: var(--font-size-base);
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

/* Header Bar */
header {
  position: sticky;
  top: 0;
  background: rgba(10, 10, 11, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-primary);
  z-index: 1000;
  padding: clamp(10px, 2vw, 15px) 0;
  box-shadow: var(--shadow-small);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: clamp(8px, 2vw, 12px) var(--container-padding);
}

header .logo {
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  font-weight: 700;
  text-decoration: none;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: var(--transition-fast);
}

header .logo:hover {
  filter: drop-shadow(var(--accent-glow));
}

header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: clamp(20px, 4vw, 30px);
}

header nav ul li a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
  position: relative;
  padding: 8px 0;
  white-space: nowrap;
}

header nav ul li a:hover {
  color: var(--text-primary);
}

header nav ul li a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background: var(--accent-gradient);
  transition: var(--transition-fast);
}

header nav ul li a:hover::after {
  width: 100%;
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: clamp(25px, 5vw, 30px);
  height: clamp(20px, 4vw, 24px);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: var(--transition-fast);
}

.hamburger:hover {
  transform: scale(1.1);
}

.hamburger span {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--text-primary);
  transition: all 0.3s ease;
  border-radius: 2px;
}

/* Main Content */
main {
  max-width: min(1000px, 95vw);
  margin: 0 auto;
  padding: var(--section-padding) var(--container-padding);
  min-height: calc(100vh - 200px);
}

/* Typography */
h1, h2, h3 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  margin-bottom: 1rem;
  line-height: 1.2;
}

h1 {
  font-size: var(--font-size-3xl);
  text-align: center;
  margin-bottom: 2rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 10px rgba(79, 70, 229, 0.3));
}

h2 {
  font-size: var(--font-size-2xl);
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
  position: relative;
}

h2::before {
  content: '';
  position: absolute;
  left: clamp(-15px, -3vw, -20px);
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 60%;
  background: var(--accent-gradient);
  border-radius: 2px;
}

h3 {
  font-size: var(--font-size-lg);
  margin-bottom: 1rem;
}

p {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

/* Home Page */
#home {
  text-align: center;
  padding: clamp(40px, 8vw, 80px) clamp(20px, 4vw, 40px);
  background: var(--bg-gradient-primary);
  border-radius: var(--border-radius-lg);
  margin: clamp(10px, 3vw, 20px) 0;
  min-height: calc(100vh - 120px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

#home h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: 1.5rem;
  animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    filter: drop-shadow(0 0 10px rgba(79, 70, 229, 0.3));
  }
  to {
    filter: drop-shadow(0 0 20px rgba(79, 70, 229, 0.5));
  }
}

#home p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: min(800px, 90vw);
  margin: 0 auto 2rem;
  line-height: 1.7;
}

/* Profile Photos */
.profile-photo {
  display: block;
  width: clamp(180px, 30vw, 250px);
  height: clamp(180px, 30vw, 250px);
  border-radius: 50%;
  margin: 2rem auto;
  object-fit: cover;
  border: 4px solid var(--border-secondary);
  box-shadow: var(--shadow-large);
  position: relative;
  transition: var(--transition-medium);
}

.profile-photo::before {
  content: '';
  position: absolute;
  top: clamp(-20px, -5vw, -30px);
  left: clamp(-20px, -5vw, -30px);
  right: clamp(-20px, -5vw, -30px);
  bottom: clamp(-20px, -5vw, -30px);
  background: var(--accent-gradient);
  border-radius: 50%;
  opacity: 0.2;
  filter: blur(30px);
  z-index: -1;
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.2;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.4;
  }
}

.profile-photo:hover {
  transform: scale(1.05);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

.photo-about {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 20px auto;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-medium);
  border: 2px solid var(--border-secondary);
  transition: var(--transition-medium);
}

.photo-about:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-large);
}

/* Projects Page */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
  gap: clamp(1rem, 4vw, 2rem);
  margin-top: 3rem;
}

.project-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition-medium);
  position: relative;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-small);
}

.project-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--card-gradient);
  opacity: 0;
  transition: var(--transition-medium);
  z-index: -1;
}

.project-item:hover {
  transform: translateY(-12px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-large);
}

.project-item:hover::before {
  opacity: 1;
}

.project-item img {
  width: 100%;
  height: clamp(150px, 25vw, 200px);
  object-fit: cover;
  transition: var(--transition-medium);
}

.project-item:hover img {
  transform: scale(1.05);
}

.project-item h3 {
  font-size: var(--font-size-xl);
  margin: clamp(1rem, 3vw, 1.5rem);
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.project-item:hover h3 {
  color: var(--accent-primary);
}

.project-item p {
  margin: 0 clamp(1rem, 3vw, 1.5rem) clamp(1rem, 3vw, 1.5rem);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

/* Buttons */
.btn {
  display: inline-block;
  margin: clamp(1rem, 3vw, 1.5rem);
  padding: clamp(10px, 2vw, 12px) clamp(20px, 4vw, 24px);
  background: var(--accent-gradient);
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: var(--transition-medium);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition-medium);
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(79, 70, 229, 0.4);
}

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

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

/* Blog/Topic Sections */
.topic-group {
  margin-bottom: 3rem;
  padding: clamp(1.5rem, 4vw, 2rem);
  background: var(--bg-glass);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-primary);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-small);
  position: relative;
  overflow: hidden;
}

.topic-group::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-gradient-secondary);
  z-index: -1;
}

.topic-group h2 {
  text-align: center;
  font-size: var(--font-size-2xl);
  margin-bottom: 2rem;
  color: var(--accent-primary);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: clamp(1rem, 3vw, 2rem);
  justify-content: center;
  padding: 1rem 0;
}

.topic-item {
  text-align: center;
  padding: clamp(1.5rem, 4vw, 2rem);
  background: var(--bg-glass);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-primary);
  transition: var(--transition-medium);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.topic-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--card-gradient);
  opacity: 0;
  transition: var(--transition-medium);
  z-index: -1;
}

.topic-item:hover {
  transform: translateY(-8px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-medium);
}

.topic-item:hover::before {
  opacity: 1;
}

.topic-item img {
  width: 100%;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  transition: var(--transition-medium);
}

.topic-item:hover img {
  transform: scale(1.03);
}

.topic-item h3 {
  margin-bottom: 1rem;
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.topic-item:hover h3 {
  color: var(--accent-primary);
}

.topic-item p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Content Sections */
.content {
  max-width: min(900px, 95vw);
  margin: 0 auto;
}

.content section {
  margin-bottom: 3rem;
  padding: clamp(1.5rem, 4vw, 2rem);
  background: var(--bg-glass);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-primary);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-small);
  transition: var(--transition-medium);
  position: relative;
  overflow: hidden;
}

.content section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-gradient-secondary);
  opacity: 0.7;
  z-index: -1;
}

.content section:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
}

.content h2 {
  color: var(--accent-primary);
  border-bottom: 2px solid var(--border-primary);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.content h3 {
  color: var(--text-primary);
  margin-top: 1.5rem;
}

.content a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: var(--transition-fast);
  position: relative;
  word-break: break-word;
}

.content a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: -2px;
  left: 0;
  background: var(--accent-gradient);
  transition: var(--transition-fast);
}

.content a:hover {
  color: var(--accent-secondary);
}

.content a:hover::after {
  width: 100%;
}

/* Contact Section */
#contact {
  max-width: min(800px, 95vw);
  margin: 0 auto;
  text-align: center;
}

#contact ul {
  list-style: none;
  padding: 0;
  margin-top: 2rem;
}

#contact li {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius);
  padding: clamp(1rem, 3vw, 1.5rem);
  margin-bottom: 1rem;
  transition: var(--transition-medium);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

#contact li::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--card-gradient);
  opacity: 0;
  transition: var(--transition-medium);
  z-index: -1;
}

#contact li:hover {
  border-color: var(--accent-primary);
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
}

#contact li:hover::before {
  opacity: 1;
}

#contact strong {
  color: var(--accent-primary);
  display: block;
  margin-bottom: 0.5rem;
  font-size: var(--font-size-base);
}

#contact a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  position: relative;
  word-break: break-word;
}

#contact a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: -2px;
  left: 0;
  background: var(--accent-gradient);
  transition: var(--transition-fast);
}

#contact a:hover {
  color: var(--accent-primary);
}

#contact a:hover::after {
  width: 100%;
}

/* Separator */
.separator {
  border: 1px solid var(--border-primary);
  margin: 2rem 0;
  background: var(--accent-gradient);
  height: 2px;
  border: none;
  border-radius: 1px;
}

/* Footer */
footer {
  text-align: center;
  padding: clamp(2rem, 5vw, 3rem) clamp(1rem, 3vw, 2rem) clamp(1rem, 3vw, 2rem);
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-primary);
  margin-top: 4rem;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-gradient-secondary);
  opacity: 0.5;
  z-index: -1;
}

footer p {
  color: var(--text-muted);
  text-align: center;
  font-size: var(--font-size-sm);
}

footer .icons {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: clamp(1rem, 3vw, 2rem);
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

footer .icons li {
  display: inline-block;
}

footer .icons a {
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  transition: var(--transition-fast);
  padding: clamp(8px, 2vw, 10px);
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: clamp(40px, 8vw, 50px);
  height: clamp(40px, 8vw, 50px);
}

footer .icons a:hover {
  color: var(--accent-primary);
  transform: translateY(-3px) scale(1.1);
  border-color: var(--accent-primary);
  box-shadow: var(--accent-glow);
}

/* Figure Caption */
figcaption {
  text-align: center;
  font-style: italic;
  color: var(--text-muted);
  margin-top: 1rem;
  font-size: var(--font-size-xs);
}

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

.fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* Enhanced Responsive Design */

/* Large Desktop Screens */
@media (min-width: 1920px) {
  :root {
    --container-max-width: 1400px;
  }
  
  .project-grid {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  }
  
  .topic-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }
}

/* Standard Desktop */
@media (min-width: 1200px) and (max-width: 1919px) {
  .project-grid {
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  }
}

/* Tablet Landscape */
@media (min-width: 1024px) and (max-width: 1199px) {
  .project-grid {
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  }
  
  .topic-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

/* Tablet Portrait and Small Laptop */
@media (min-width: 768px) and (max-width: 1023px) {
  .hamburger {
    display: none;
  }
  
  header nav ul {
    gap: clamp(15px, 3vw, 25px);
  }
  
  .project-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
  }
  
  .topic-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
  
  #home {
    padding: clamp(50px, 7vw, 70px) clamp(30px, 5vw, 40px);
  }
}

/* Mobile Landscape and Small Tablets */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  header nav {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    border-top: 1px solid var(--border-primary);
  }

  header nav ul {
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
    gap: 1rem;
  }

  header nav.active {
    max-height: 400px;
  }

  main {
    padding: clamp(1.5rem, 4vw, 2rem) var(--container-padding);
  }

  .project-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

  #home {
    padding: clamp(40px, 6vw, 60px) clamp(20px, 4vw, 30px);
    margin: 10px 0;
    min-height: calc(100vh - 100px);
  }

  h2::before {
    left: clamp(-10px, -2vw, -15px);
    width: 3px;
  }
  
  .content section {
    padding: clamp(1rem, 3vw, 1.5rem);
  }
}

/* Mobile Portrait */
@media (max-width: 480px) {
  :root {
    --container-padding: clamp(10px, 3vw, 15px);
  }

  main {
    padding: clamp(1rem, 3vw, 1.5rem) var(--container-padding);
  }

  .topic-item {
    padding: clamp(1rem, 3vw, 1.5rem);
  }

  .btn {
    padding: clamp(8px, 2vw, 10px) clamp(16px, 4vw, 20px);
    font-size: var(--font-size-xs);
    margin: clamp(0.5rem, 2vw, 1rem);
  }

  #home {
    padding: clamp(30px, 5vw, 50px) clamp(15px, 3vw, 25px);
    min-height: calc(100vh - 80px);
  }

  h2::before {
    display: none;
  }
  
  .profile-photo {
    width: clamp(150px, 35vw, 200px);
    height: clamp(150px, 35vw, 200px);
  }
  
  #contact li {
    padding: clamp(0.75rem, 2vw, 1rem);
  }
  
  footer .icons {
    gap: clamp(0.75rem, 2vw, 1.5rem);
  }
  
  footer .icons a {
    width: clamp(35px, 7vw, 45px);
    height: clamp(35px, 7vw, 45px);
  }
}

/* Very Small Screens */
@media (max-width: 320px) {
  :root {
    --container-padding: 10px;
  }
  
  header .logo {
    font-size: clamp(1rem, 4vw, 1.25rem);
  }
  
  .project-item img {
    height: clamp(120px, 20vw, 150px);
  }
  
  #home p {
    font-size: clamp(0.875rem, 3vw, 1rem);
  }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: clamp(6px, 1vw, 8px);
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-gradient);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}

/* Selection */
::selection {
  background: var(--accent-primary);
  color: white;
}

/* Focus Styles */
button:focus,
a:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  header,
  footer,
  .hamburger {
    display: none;
  }
  
  main {
    padding: 0;
    max-width: 100%;
  }
  
  * {
    background: white !important;
    color: black !important;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --border-primary: #ffffff;
    --border-secondary: #ffffff;
    --text-secondary: #ffffff;
    --bg-card: #000000;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .profile-photo::before {
    animation: none;
  }
  
  #home h1 {
    animation: none;
  }
}

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

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

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  background-image: var(--bg-gradient-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--container-padding);
}

/* Header Bar */
header {
  position: sticky;
  top: 0;
  background: rgba(10, 10, 11, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-primary);
  z-index: 1000;
  padding: 15px 0;
  box-shadow: var(--shadow-small);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 20px;
}

header .logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: var(--transition-fast);
}

header .logo:hover {
  filter: drop-shadow(var(--accent-glow));
}

header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
}

header nav ul li {
  margin-left: 30px;
}

header nav ul li a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
  padding: 8px 0;
}

header nav ul li a:hover {
  color: var(--text-primary);
}

header nav ul li a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background: var(--accent-gradient);
  transition: var(--transition-fast);
}

header nav ul li a:hover::after {
  width: 100%;
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: var(--transition-fast);
}

.hamburger:hover {
  transform: scale(1.1);
}

.hamburger span {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--text-primary);
  transition: all 0.3s ease;
  border-radius: 2px;
}

/* Main Content */
main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 60px 20px;
  min-height: calc(100vh - 200px);
}

/* Typography */
h1, h2, h3 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  text-align: center;
  margin-bottom: 2rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 10px rgba(79, 70, 229, 0.3));
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
  position: relative;
}

h2::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 60%;
  background: var(--accent-gradient);
  border-radius: 2px;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

/* Home Page */
#home {
  text-align: center;
  padding: 80px 0;
  background: var(--bg-gradient-primary);
  border-radius: var(--border-radius-lg);
  margin: 20px 0;
}

#home h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 1.5rem;
  animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    filter: drop-shadow(0 0 10px rgba(79, 70, 229, 0.3));
  }
  to {
    filter: drop-shadow(0 0 20px rgba(79, 70, 229, 0.5));
  }
}

#home p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

/* Profile Photos */
.profile-photo {
  display: block;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  margin: 2rem auto;
  object-fit: cover;
  border: 4px solid var(--border-secondary);
  box-shadow: var(--shadow-large);
  position: relative;
  transition: var(--transition-medium);
}

.profile-photo::before {
  content: '';
  position: absolute;
  top: -30px;
  left: -30px;
  right: -30px;
  bottom: -30px;
  background: var(--accent-gradient);
  border-radius: 50%;
  opacity: 0.2;
  filter: blur(30px);
  z-index: -1;
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.2;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.4;
  }
}

.profile-photo:hover {
  transform: scale(1.05);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

.photo-about {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 20px auto;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-medium);
  border: 2px solid var(--border-secondary);
  transition: var(--transition-medium);
}

.photo-about:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-large);
}

/* Projects Page */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.project-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition-medium);
  position: relative;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-small);
}

.project-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--card-gradient);
  opacity: 0;
  transition: var(--transition-medium);
  z-index: -1;
}

.project-item:hover {
  transform: translateY(-12px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-large);
}

.project-item:hover::before {
  opacity: 1;
}

.project-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: var(--transition-medium);
}

.project-item:hover img {
  transform: scale(1.05);
}

.project-item h3 {
  font-size: 1.5rem;
  margin: 1.5rem;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.project-item:hover h3 {
  color: var(--accent-primary);
}

.project-item p {
  margin: 0 1.5rem 1.5rem;
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Buttons */
.btn {
  display: inline-block;
  margin: 1.5rem;
  padding: 12px 24px;
  background: var(--accent-gradient);
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition-medium);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition-medium);
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(79, 70, 229, 0.4);
}

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

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

/* Blog/Topic Sections */
.topic-group {
  margin-bottom: 3rem;
  padding: 2rem;
  background: var(--bg-glass);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-primary);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-small);
  position: relative;
  overflow: hidden;
}

.topic-group::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-gradient-secondary);
  z-index: -1;
}

.topic-group h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--accent-primary);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  justify-content: center;
  padding: 1rem 0;
}

.topic-item {
  text-align: center;
  padding: 2rem;
  background: var(--bg-glass);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-primary);
  transition: var(--transition-medium);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.topic-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--card-gradient);
  opacity: 0;
  transition: var(--transition-medium);
  z-index: -1;
}

.topic-item:hover {
  transform: translateY(-8px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-medium);
}

.topic-item:hover::before {
  opacity: 1;
}

.topic-item img {
  width: 100%;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  transition: var(--transition-medium);
}

.topic-item:hover img {
  transform: scale(1.03);
}

.topic-item h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.topic-item:hover h3 {
  color: var(--accent-primary);
}

.topic-item p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Content Sections */
.content {
  max-width: 900px;
  margin: 0 auto;
}

.content section {
  margin-bottom: 3rem;
  padding: 2rem;
  background: var(--bg-glass);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-primary);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-small);
  transition: var(--transition-medium);
  position: relative;
  overflow: hidden;
}

.content section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-gradient-secondary);
  opacity: 0.7;
  z-index: -1;
}

.content section:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
}

.content h2 {
  color: var(--accent-primary);
  border-bottom: 2px solid var(--border-primary);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.content h3 {
  color: var(--text-primary);
  margin-top: 1.5rem;
}

.content a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: var(--transition-fast);
  position: relative;
}

.content a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: -2px;
  left: 0;
  background: var(--accent-gradient);
  transition: var(--transition-fast);
}

.content a:hover {
  color: var(--accent-secondary);
}

.content a:hover::after {
  width: 100%;
}

/* Contact Section */
#contact {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

#contact ul {
  list-style: none;
  padding: 0;
  margin-top: 2rem;
}

#contact li {
  background: var(--bg-glass);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: var(--transition-medium);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

#contact li::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--card-gradient);
  opacity: 0;
  transition: var(--transition-medium);
  z-index: -1;
}

#contact li:hover {
  border-color: var(--accent-primary);
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
}

#contact li:hover::before {
  opacity: 1;
}

#contact strong {
  color: var(--accent-primary);
  display: block;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

#contact a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  position: relative;
}

#contact a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: -2px;
  left: 0;
  background: var(--accent-gradient);
  transition: var(--transition-fast);
}

#contact a:hover {
  color: var(--accent-primary);
}

#contact a:hover::after {
  width: 100%;
}

/* Separator */
.separator {
  border: 1px solid var(--border-primary);
  margin: 2rem 0;
  background: var(--accent-gradient);
  height: 2px;
  border: none;
  border-radius: 1px;
}

/* Footer */
footer {
  text-align: center;
  padding: 3rem 2rem 2rem;
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-primary);
  margin-top: 4rem;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-gradient-secondary);
  opacity: 0.5;
  z-index: -1;
}

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

footer .icons {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

footer .icons li {
  display: inline-block;
}

footer .icons a {
  color: var(--text-secondary);
  font-size: 1.5rem;
  transition: var(--transition-fast);
  padding: 10px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
}

footer .icons a:hover {
  color: var(--accent-primary);
  transform: translateY(-3px) scale(1.1);
  border-color: var(--accent-primary);
  box-shadow: var(--accent-glow);
}

/* Figure Caption */
figcaption {
  text-align: center;
  font-style: italic;
  color: var(--text-muted);
  margin-top: 1rem;
  font-size: 0.9rem;
}

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

.fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  header nav {
    position: absolute;
    top: 70px;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    border-top: 1px solid var(--border-primary);
  }

  header nav ul {
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
  }

  header nav ul li {
    margin: 0.5rem 0;
  }

  header nav.active {
    max-height: 400px;
  }

  main {
    padding: 2rem 1rem;
  }

  .project-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

  #home {
    padding: 3rem 1rem;
    margin: 10px 0;
  }

  .profile-photo {
    width: 200px;
    height: 200px;
  }

  h2::before {
    left: -15px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  main {
    padding: 1.5rem 1rem;
  }

  .topic-item {
    padding: 1.5rem;
  }

  .content section {
    padding: 1.5rem;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  #home {
    padding: 2rem 1rem;
  }

  h2::before {
    display: none;
  }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-gradient);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}

/* Selection */
::selection {
  background: var(--accent-primary);
  color: white;
}

/* Focus Styles */
button:focus,
a:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
/* Landing Page Specific Styles */

/* Content Sections */
.content-section {
  padding: clamp(3rem, 8vw, 6rem) 0;
  position: relative;
}

.content-section:nth-child(even) {
  background: rgba(79, 70, 229, 0.02);
}

.content-section h2 {
  text-align: center;
  margin-bottom: clamp(2rem, 5vw, 4rem);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.content-section h2 i {
  color: var(--accent-primary);
  font-size: 0.9em;
}

/* About Section */
.about-preview {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  max-width: 1000px;
  margin: 0 auto;
}

.photo-about-small {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-medium);
  border: 2px solid var(--border-secondary);
  transition: var(--transition-medium);
}

.photo-about-small:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-large);
}

.about-content h3 {
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  margin-top: 2rem;
}

.about-content h3:first-child {
  margin-top: 0;
}

.about-content h3 i {
  font-size: 0.9em;
}

.credentials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.credential-item {
  background: var(--bg-glass);
  padding: clamp(1.5rem, 3vw, 2rem);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-primary);
  backdrop-filter: blur(10px);
  transition: var(--transition-medium);
}

.credential-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
  border-color: var(--accent-primary);
}

.publications-preview {
  margin: 2rem 0;
}

.publication-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

/* Activity Section */
.activity-grid {
  display: grid;
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.activity-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  background: var(--bg-glass);
  padding: clamp(1.5rem, 3vw, 2rem);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-primary);
  backdrop-filter: blur(10px);
  transition: var(--transition-medium);
  align-items: start;
}

.activity-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
  border-color: var(--accent-primary);
}

.activity-date {
  text-align: center;
  background: var(--accent-gradient);
  color: white;
  padding: 1rem;
  border-radius: var(--border-radius);
  min-width: 80px;
  box-shadow: var(--shadow-small);
}

.activity-date .month {
  display: block;
  font-weight: 600;
  font-size: 1.1rem;
  text-transform: uppercase;
}

.activity-date .year {
  display: block;
  font-size: 1.3rem;
  font-weight: 700;
  margin-top: 0.2rem;
}

.activity-content h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-size: var(--font-size-lg);
}

.btn-link {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  transition: var(--transition-fast);
}

.btn-link:hover {
  color: var(--accent-secondary);
  transform: translateX(5px);
}

/* Contact Section */
.contact-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.contact-item {
  background: var(--bg-glass);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-primary);
  backdrop-filter: blur(10px);
  transition: var(--transition-medium);
  text-align: center;
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
  border-color: var(--accent-primary);
}

.contact-item i {
  font-size: 2.5rem;
  color: var(--accent-primary);
  margin-bottom: 1rem;
  display: block;
}

.contact-item h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: var(--font-size-lg);
}

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

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

/* Section Footer */
.section-footer {
  text-align: center;
  margin-top: clamp(2rem, 5vw, 3rem);
}

/* Blog Preview Grid */
.blog-preview-grid {
  max-width: 1000px;
  margin: 0 auto;
}

.blog-preview-grid .topic-group {
  margin-bottom: 2rem;
}

.blog-preview-grid .topic-group h3 {
  color: var(--accent-primary);
  text-align: center;
  margin-bottom: 1.5rem;
  font-size: var(--font-size-xl);
}

.blog-preview-grid .topic-item h4 {
  font-size: var(--font-size-base);
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-family: var(--font-serif);
}

/* Enhanced Footer */
.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  color: var(--accent-primary);
  margin-bottom: 1rem;
  font-size: var(--font-size-lg);
}

.footer-section p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  font-size: var(--font-size-sm);
}

.footer-section ul li a:hover {
  color: var(--accent-primary);
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  color: var(--text-secondary);
  font-size: 1.5rem;
  transition: var(--transition-fast);
  padding: 0.5rem;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
}

.social-links a:hover {
  color: var(--accent-primary);
  transform: translateY(-3px);
  border-color: var(--accent-primary);
  box-shadow: var(--accent-glow);
}

.footer-bottom {
  border-top: 1px solid var(--border-primary);
  padding-top: 2rem;
  text-align: center;
}

/* Active Navigation State */
header nav a.active {
  color: var(--accent-primary);
}

header nav a.active::after {
  width: 100%;
}

/* Responsive Adjustments for Landing Page */
@media (max-width: 768px) {
  .about-preview {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .credentials-grid {
    grid-template-columns: 1fr;
  }
  
  .activity-item {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .activity-date {
    width: fit-content;
    margin: 0 auto;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }
  
  .publication-links {
    justify-content: center;
  }
  
  .social-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .content-section {
    padding: clamp(2rem, 6vw, 4rem) 0;
  }
  
  #home {
    min-height: calc(100vh - 80px);
  }
  
  .activity-date {
    padding: 0.75rem;
    min-width: 70px;
  }
  
  .activity-date .month {
    font-size: 0.9rem;
  }
  
  .activity-date .year {
    font-size: 1.1rem;
  }
  
  .contact-item {
    padding: 1.5rem;
  }
  
  .contact-item i {
    font-size: 2rem;
  }
}