/* CSS Variables for Light and Dark Themes */
:root {
  /* Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border: #dee2e6;
  --shadow: rgba(0, 0, 0, 0.1);
  --card-bg: #ffffff;
  --input-bg: #ffffff;
  --gradient-start: #3b82f6;
  --gradient-end: #8b5cf6;
}

[data-theme="dark"] {
  /* Dark Theme - Primary color: #F99500 (Orange) */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --accent: #F99500;
  --accent-hover: #EA580C;
  --border: #334155;
  --shadow: rgba(0, 0, 0, 0.3);
  --card-bg: #1e293b;
  --input-bg: #1e293b;
  --gradient-start: #DC2626;
  --gradient-end: #F99500;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-brand .logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

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

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-toggle,
.theme-toggle,
.mobile-menu-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lang-toggle:hover,
.theme-toggle:hover,
.mobile-menu-toggle:hover {
  background-color: var(--bg-secondary);
  border-color: var(--accent);
}

.lang-text {
  font-size: 0.875rem;
  font-weight: 500;
}

/* Main Content */
.main {
  flex: 1;
  margin-top: 80px;
}

/* Hero Section */
.hero {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  padding: 4rem 2rem;
  background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="1" fill="white" opacity="0.1"/><circle cx="10" cy="50" r="1" fill="white" opacity="0.1"/><circle cx="90" cy="30" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.highlight {
  display: block;
  background: linear-gradient(45deg, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

.hero-description {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  opacity: 0.8;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  cursor: pointer;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

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

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

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

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all 0.3s ease;
}

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

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.avatar-placeholder {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  color: white;
  border: 4px solid rgba(255, 255, 255, 0.2);
}

/* Section Styles */
section {
  padding: 5rem 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* About Section */
.about {
  background-color: var(--bg-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-text p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
  font-size: 1.125rem;
  line-height: 1.7;
}

.about-info {
  margin-top: 2rem;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

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

.about-skills h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.skill-card {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  text-align: center;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.skill-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--shadow);
}

.skill-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
}

.skill-card h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

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

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

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

.project-card {
  background-color: var(--card-bg);
  border-radius: 1rem;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--shadow);
}

.project-image {
  height: 200px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-placeholder {
  font-size: 3rem;
  color: white;
  opacity: 0.8;
}

.project-content {
  padding: 1.5rem;
}

.project-content h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.project-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
}

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

.project-tech span {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-weight: 500;
}

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

.project-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.3s ease;
}

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

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

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

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

.contact-item i {
  color: var(--accent);
  width: 20px;
  margin-top: 2px;
}

.contact-item div {
  flex: 1;
}

.contact-item span {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

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

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

/* Contact Form */
.contact-form {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
}

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  background-color: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text-primary);
  font-family: inherit;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group label {
  position: absolute;
  left: 1rem;
  top: 1rem;
  color: var(--text-muted);
  transition: all 0.3s ease;
  pointer-events: none;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: -0.5rem;
  left: 0.5rem;
  font-size: 0.75rem;
  background-color: var(--card-bg);
  padding: 0 0.25rem;
  color: var(--accent);
}

/* Footer */
.footer {
  background-color: var(--bg-tertiary);
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .nav {
    padding: 1rem;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
  }

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

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-social {
    justify-content: center;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

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

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 2rem 1rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .avatar-placeholder {
    width: 200px;
    height: 200px;
    font-size: 3rem;
  }

  section {
    padding: 3rem 0;
  }

  .section-title {
    font-size: 2rem;
  }
}

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

.hero-content > * {
  animation: fadeInUp 0.8s ease-out;
}

.hero-content > *:nth-child(2) {
  animation-delay: 0.2s;
}

.hero-content > *:nth-child(3) {
  animation-delay: 0.4s;
}

.hero-content > *:nth-child(4) {
  animation-delay: 0.6s;
}

.hero-content > *:nth-child(5) {
  animation-delay: 0.8s;
}

/* Blog Section */
.blog {
  background-color: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.blog-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.filter-select {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background-color: var(--input-bg);
  color: var(--text-primary);
  font-family: inherit;
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.blog-card {
  background-color: var(--card-bg);
  border-radius: 1rem;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--shadow);
}

.blog-card-image {
  height: 200px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

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

.blog-card-image-placeholder {
  font-size: 3rem;
  color: white;
  opacity: 0.8;
}

.blog-card-content {
  padding: 1.5rem;
}

.blog-card-category {
  display: inline-block;
  background-color: var(--accent);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.blog-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.blog-card-excerpt {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.blog-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pagination-btn {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  background-color: var(--card-bg);
  color: var(--text-primary);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.pagination-btn:hover,
.pagination-btn.active {
  background-color: var(--accent);
  color: white;
  border-color: var(--accent);
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal.active {
  display: flex;
}

.modal-content {
  background-color: var(--card-bg);
  border-radius: 1rem;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: modalSlideIn 0.3s ease;
}

.modal-large {
  max-width: 800px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
}

.modal-close:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.article-form {
  padding: 1.5rem;
}

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

.article-form select {
  width: 100%;
  padding: 1rem;
  background-color: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text-primary);
  font-family: inherit;
  cursor: pointer;
  transition: all 0.3s ease;
}

.article-form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  margin-top: 2rem;
}

.btn-danger {
  background-color: #ef4444;
  color: white;
}

.btn-danger:hover {
  background-color: #dc2626;
  transform: translateY(-2px);
}

/* Article View */
.article-view-content {
  padding: 1.5rem;
}

.article-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.article-category {
  background-color: var(--accent);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.article-date {
  color: var(--text-muted);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-image {
  margin-bottom: 1.5rem;
  text-align: center;
}

.article-image img {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
}

.article-excerpt {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
  font-style: italic;
}

.article-content {
  color: var(--text-primary);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.article-content p {
  margin-bottom: 1rem;
}

.article-content h1,
.article-content h2,
.article-content h3 {
  margin-bottom: 0.5rem;
  margin-top: 1.5rem;
}

.article-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

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

/* Responsive Design for Blog */
@media (max-width: 768px) {
  .blog-controls {
    flex-direction: column;
    align-items: stretch;
  }

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

  .modal-content {
    margin: 1rem;
    max-height: calc(100vh - 2rem);
  }

  .form-actions {
    flex-direction: column;
  }

  .article-actions {
    flex-direction: column;
  }

  .article-meta {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* Scientific Background Animation */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(220, 38, 38, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(249, 149, 0, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(220, 38, 38, 0.05) 0%, transparent 50%),
    linear-gradient(45deg, rgba(220, 38, 38, 0.02) 0%, rgba(249, 149, 0, 0.02) 100%);
  animation: scientificPulse 8s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes scientificPulse {
  0% {
    transform: scale(1) rotate(0deg);
    opacity: 0.3;
  }
  50% {
    transform: scale(1.1) rotate(2deg);
    opacity: 0.5;
  }
  100% {
    transform: scale(1.2) rotate(-1deg);
    opacity: 0.7;
  }
}

/* Floating particles animation */
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(2px 2px at 20% 30%, rgba(220, 38, 38, 0.8), transparent),
    radial-gradient(2px 2px at 60% 70%, rgba(249, 149, 0, 0.8), transparent),
    radial-gradient(1px 1px at 50% 50%, rgba(220, 38, 38, 0.6), transparent),
    radial-gradient(1px 1px at 80% 10%, rgba(249, 149, 0, 0.6), transparent),
    radial-gradient(2px 2px at 90% 60%, rgba(220, 38, 38, 0.4), transparent);
  background-size: 200px 200px, 150px 150px, 100px 100px, 250px 250px, 180px 180px;
  animation: particlesFloat 20s linear infinite;
  pointer-events: none;
}

@keyframes particlesFloat {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(30px, -30px) rotate(120deg);
  }
  66% {
    transform: translate(-20px, 20px) rotate(240deg);
  }
  100% {
    transform: translate(0, 0) rotate(360deg);
  }
}

/* Blog section scientific background */
.blog::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(135deg, rgba(220, 38, 38, 0.02) 0%, rgba(249, 149, 0, 0.02) 100%),
    radial-gradient(circle at 25% 25%, rgba(220, 38, 38, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(249, 149, 0, 0.03) 0%, transparent 50%);
  animation: subtleShift 12s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: -1;
}

@keyframes subtleShift {
  0% {
    transform: scale(1) rotate(0deg);
    opacity: 0.1;
  }
  100% {
    transform: scale(1.05) rotate(1deg);
    opacity: 0.15;
  }
}

/* Smooth transitions for theme switching */
* {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}