:root {
  --light-bg: #f8f9fa;
  --dark-bg: #0a0a14;
  --light-text: #121212;
  --dark-text: #e0e0e0;
  --accent: #2563eb;
  --accent-dark: #3dd68c;
  --card-light: #ffffff;
  --card-dark: #151522;
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--light-bg);
  color: var(--light-text);
  transition: var(--transition);
  line-height: 1.6;
  overflow-x: hidden;
}

body.dark {
  background-color: var(--dark-bg);
  color: var(--dark-text);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 0;
  position: relative;
}

.header-content {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.profile-image {
  width: 80px;
  height: 80px;
  overflow: hidden;
  position: relative;
  border: 2px solid var(--accent);
  cursor: pointer;
  border-radius: 8px;
}

body.dark .profile-image {
  border-color: var(--accent-dark);
}

.profile-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.name-title h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.name-title p {
  font-family: 'Fira Code', monospace;
  color: #666;
  font-size: 0.9rem;
}

body.dark .name-title p {
  color: #aaa;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* Desktop Navigation */
.desktop-nav {
  display: flex;
  gap: 1.5rem;
}

.desktop-nav .nav-link {
  text-decoration: none;
  color: var(--light-text);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 0.5rem 0;
  min-width: 80px;
  text-align: center;
  display: inline-block;
}

body.dark .desktop-nav .nav-link {
  color: var(--dark-text);
}

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

body.dark .desktop-nav .nav-link:after {
  background-color: var(--accent-dark);
}

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

/* Active page indicator */
.desktop-nav .nav-link.active {
  color: var(--accent) !important;
}

body.dark .desktop-nav .nav-link.active {
  color: var(--accent-dark) !important;
}

.desktop-nav .nav-link.active:after {
  width: 100% !important;
}

/* Header Controls */
.header-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.social-links-header {
  display: flex;
  gap: 0.75rem;
}

.mobile-menu-toggle {
  display: none;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 24px;
  height: 24px;
  position: relative;
  z-index: 1001;
}

.mobile-menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--light-text);
  transition: var(--transition);
  transform-origin: center;
}

body.dark .mobile-menu-toggle span {
  background-color: var(--dark-text);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--card-light);
  z-index: 999;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

body.dark .mobile-nav {
  background-color: #000;
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav-content {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  text-align: center;
  width: 100%;
  max-width: 300px;
}

.mobile-nav .nav-link {
  font-size: 1.8rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--light-text);
  transition: var(--transition);
  padding: 1rem 2rem;
  position: relative;
}

body.dark .mobile-nav .nav-link {
  color: var(--dark-text);
}

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

body.dark .mobile-nav .nav-link:hover {
  color: var(--accent-dark);
}

.mobile-nav-footer {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid #eaeaea;
  width: 100%;
  max-width: 300px;
}

body.dark .mobile-nav-footer {
  border-top: 1px solid #333;
}

.mobile-nav-footer a {
  color: #666;
  font-size: 1.5rem;
  text-decoration: none;
  transition: var(--transition);
}

body.dark .mobile-nav-footer a {
  color: #888;
}

.mobile-nav-footer a:hover {
  color: var(--accent);
}

body.dark .mobile-nav-footer a:hover {
  color: var(--accent-dark);
}

/* Theme Toggle */
.theme-toggle {
  cursor: pointer;
  font-size: 1.2rem;
  padding: 0.5rem;
  border-radius: 50%;
  transition: var(--transition);
}

.theme-toggle:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

body.dark .theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

/* Main content */
main {
  padding: 2rem 0;
  min-height: 60vh;
}

.greeting {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 2rem;
  min-height: 2.5rem;
  font-family: 'Fira Code', monospace;
}

.intro {
  max-width: 700px;
  margin-bottom: 3rem;
}

.intro p {
  margin-bottom: 1.2rem;
  font-size: 1.1rem;
}

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

body.dark .intro a {
  color: var(--accent-dark);
}

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

body.dark .intro a:after {
  background-color: var(--accent-dark);
}

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

/* Social links */
.social-links-header .social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--card-light);
  color: var(--light-text);
  transition: var(--transition);
  text-decoration: none;
  border: 1px solid #eaeaea;
}

body.dark .social-links-header .social-link {
  background-color: var(--card-dark);
  border-color: #2a2a3a;
  color: var(--dark-text);
}

.social-links-header .social-link:hover {
  transform: translateY(-2px);
  background-color: var(--accent-dark);
  color: white;
  border-color: var(--accent-dark);
}

body.dark .social-links-header .social-link:hover {
  background-color: var(--accent);
  border-color: var(--accent);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 0;
  margin-top: 4rem;
  color: #666;
  font-size: 0.9rem;
}

body.dark footer {
  color: #888;
}

.social-links-footer {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

/* Footer social links (no transitions, no borders) */
.social-links-footer a {
  color: #666;
  font-size: 1.2rem;
  text-decoration: none;
}

body.dark .social-links-footer a {
  color: #888;
}

.social-links-footer a:hover {
  color: var(--accent);
}

body.dark .social-links-footer a:hover {
  color: var(--accent-dark);
}

/* Space background elements */
.space-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.star {
  position: absolute;
  background-color: white;
  border-radius: 50%;
  opacity: 0;
  animation: twinkle 5s infinite;
}

body.dark .star {
  opacity: 0.3;
}

@keyframes twinkle {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 1; }
}

/* Page title styles */
.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 2rem;
  position: relative;
  display: inline-block;
}

.page-title:after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60%;
  height: 4px;
  background-color: var(--accent);
  border-radius: 2px;
}

body.dark .page-title:after {
  background-color: var(--accent-dark);
}

/* Column page styles */
.column-posts {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin: 2rem 0;
}

.column-post {
  background-color: var(--card-light);
  border-radius: 12px;
  padding: 2rem;
  transition: var(--transition);
  border: 1px solid #eaeaea;
}

body.dark .column-post {
  background-color: var(--card-dark);
  border-color: #2a2a3a;
}

.column-post:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

body.dark .column-post:hover {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.column-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

body.dark .column-title {
  color: var(--accent-dark);
}

.column-date {
  color: #666;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

body.dark .column-date {
  color: #aaa;
}

.column-excerpt {
  line-height: 1.6;
  color: var(--light-text);
}

body.dark .column-excerpt {
  color: var(--dark-text);
}

/* Experiments grid */
.experiments-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.experiment-card {
  background-color: var(--card-light);
  border-radius: 12px;
  padding: 1.5rem;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  border: 1px solid #eaeaea;
  display: flex;
  flex-direction: column;
  height: 100%;
}

body.dark .experiment-card {
  background-color: var(--card-dark);
  border-color: #2a2a3a;
}

.experiment-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  border-color: var(--accent);
}

body.dark .experiment-card:hover {
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  border-color: var(--accent-dark);
}

.experiment-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.experiment-description {
  color: #666;
  flex-grow: 1;
}

body.dark .experiment-description {
  color: #aaa;
}

/* Contact page styles */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin: 2rem 0;
}

.contact-info h2,
.contact-form h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

body.dark .contact-info h2,
body.dark .contact-form h2 {
  color: var(--accent-dark);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-item i {
  font-size: 1.2rem;
  width: 24px;
  color: var(--accent);
}

body.dark .contact-item i {
  color: var(--accent-dark);
}

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

body.dark .contact-item a {
  color: var(--accent-dark);
}

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

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

body.dark .form-group input,
body.dark .form-group textarea {
  border-color: #2a2a3a;
  background-color: var(--card-dark);
  color: var(--dark-text);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

body.dark .form-group input:focus,
body.dark .form-group textarea:focus {
  border-color: var(--accent-dark);
  box-shadow: 0 0 0 3px rgba(61, 214, 140, 0.2);
}

.submit-btn {
  background-color: var(--accent);
  color: white;
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

body.dark .submit-btn {
  background-color: var(--accent-dark);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

body.dark .submit-btn:hover {
  box-shadow: 0 4px 12px rgba(61, 214, 140, 0.3);
}

/* Active page indicator for desktop navigation */
.desktop-nav .nav-link.active {
  color: var(--accent) !important;
}

body.dark .desktop-nav .nav-link.active {
  color: var(--accent-dark) !important;
}

.desktop-nav .nav-link.active:after {
  width: 100% !important;
}

/* Fixed width for nav links to prevent layout shifting */
.desktop-nav .nav-link {
  min-width: 80px;
  text-align: center;
  display: inline-block;
}

/* Fixed navigation glitch animation */
.nav-link {
  position: relative;
  min-width: 80px;
  text-align: center;
  display: inline-block;
}

.nav-link .glitch-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--card-light);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

body.dark .nav-link .glitch-overlay {
  background-color: var(--dark-bg);
}

.nav-link:hover .glitch-overlay {
  opacity: 1;
}

/* Responsive design */
@media (max-width: 768px) {
  header {
    flex-direction: row;
    align-items: center;
    gap: 0;
  }
  
  .header-content {
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    flex: 1;
  }
  
  .header-right {
    width: auto;
    justify-content: flex-end;
  }
  
  .desktop-nav {
    display: none;
  }
  
  .social-links-header {
    display: none;
  }
  
  .header-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    order: 3;
    margin-left: auto;
  }
  
  .theme-toggle {
    order: 1;
  }
  
  .mobile-menu-toggle {
    display: flex;
    order: 2;
    margin-left: 1rem;
  }
  
  .name-title h1 {
    font-size: 1.6rem;
  }
  
  .page-title {
    font-size: 2rem;
  }
  
  .experiments-grid,
  .column-posts {
    grid-template-columns: 1fr;
  }
  
  .intro p {
    font-size: 1rem;
  }
  
  .mobile-nav .nav-link {
    font-size: 1.5rem;
  }
  
  .social-links-footer {
    gap: 1rem;
  }
  
  .social-links-footer a {
    font-size: 1.1rem;
  }
  
  .mobile-nav-footer a {
    font-size: 1.3rem;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .column-post {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .greeting {
    font-size: 1.5rem;
  }
  
  .profile-image {
    width: 50px;
    height: 50px;
  }
  
  .header-content {
    gap: 0.75rem;
  }
}