/* Modern Portfolio CSS - Inspired by HugoBlox Academic CV Theme */

/* CSS Custom Properties for Design System */
:root {
  /* Colors */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;
  
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  --accent-teal: #14b8a6;
  --accent-purple: #8b5cf6;
  --accent-orange: #f59e0b;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  --gradient-accent: linear-gradient(135deg, var(--accent-teal), var(--primary-500));
  --gradient-hero: linear-gradient(135deg, var(--primary-50), var(--gray-50));
}

/* Dark mode support */
[data-theme="dark"] {
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  --gradient-hero: linear-gradient(135deg, var(--gray-800), var(--gray-700));
}

[data-theme="dark"] body,
body[data-theme="dark"],
[data-theme="dark"] .page-content,
[data-theme="dark"] .wrapper,
[data-theme="dark"] html {
  background: var(--gray-900) !important;
  color: var(--gray-300) !important;
}

/* Override minima theme styles */
html[data-theme="dark"],
html[data-theme="dark"] body {
  background-color: var(--gray-900) !important;
}

[data-theme="dark"] .minima-social-icons,
[data-theme="dark"] .post-content,
[data-theme="dark"] .post-header,
[data-theme="dark"] .post-title {
  color: var(--gray-300) !important;
}

[data-theme="dark"] .card, 
[data-theme="dark"] .expertise-card, 
[data-theme="dark"] .contact-item, 
[data-theme="dark"] .blog-card, 
[data-theme="dark"] .timeline-content, 
[data-theme="dark"] .achievement-item, 
[data-theme="dark"] .metrics-container, 
[data-theme="dark"] .languages-section,
[data-theme="dark"] .hero-section {
  background: var(--gray-800) !important;
  border-color: var(--gray-700) !important;
  color: var(--gray-300) !important;
}

[data-theme="dark"] .site-header {
  background: var(--gray-800) !important;
  border-bottom: 1px solid var(--gray-700) !important;
}

[data-theme="dark"] .page-link,
[data-theme="dark"] .site-title {
  color: var(--gray-300) !important;
}

[data-theme="dark"] .page-link:hover {
  color: var(--primary-400) !important;
}

/* Theme and Language Toggle Buttons */
.mobile-toggles {
  display: none; /* Hidden on desktop */
}

.dark-mode-toggle {
  background: white;
  border: 1px solid var(--gray-300);
  border-radius: 0.5rem;
  padding: 0.375rem;
  margin-left: 0.75rem;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2.25rem;
  vertical-align: middle;
  text-decoration: none;
  color: var(--gray-700);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.language-toggle {
  background: white;
  border: 1px solid var(--gray-300);
  border-radius: 0.5rem;
  padding: 0.375rem 0.75rem;
  margin-left: 0.75rem;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  height: 2.25rem;
  vertical-align: middle;
  text-decoration: none;
  color: var(--gray-700);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  min-width: auto;
}

.dark-mode-toggle:hover,
.language-toggle:hover {
  background: var(--gray-50);
  border-color: var(--primary-400);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.dark-mode-toggle:active,
.language-toggle:active {
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* Language toggle specific elements */
.lang-current {
  color: var(--primary-600);
  font-weight: 700;
}

.lang-separator {
  color: var(--gray-500);
  margin: 0 0.1rem;
}

.lang-other {
  color: var(--gray-600);
  font-weight: 500;
  opacity: 0.8;
}

.language-toggle:hover .lang-other {
  color: var(--primary-500);
  opacity: 1;
}

/* Dark mode styles for toggles */
[data-theme="dark"] .dark-mode-toggle,
[data-theme="dark"] .language-toggle {
  background: var(--gray-800);
  border-color: var(--gray-600);
  color: var(--gray-300);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .dark-mode-toggle:hover,
[data-theme="dark"] .language-toggle:hover {
  background: var(--gray-700);
  border-color: var(--primary-400);
}

/* Dark mode language toggle elements */
[data-theme="dark"] .lang-current {
  color: var(--primary-400);
}

[data-theme="dark"] .lang-separator {
  color: var(--gray-500);
}

[data-theme="dark"] .lang-other {
  color: var(--gray-400);
}

[data-theme="dark"] .language-toggle:hover .lang-other {
  color: var(--primary-300);
}

/* Mobile responsive for toggles */
@media (max-width: 768px) {
  .dark-mode-toggle {
    margin-left: 0.5rem;
    min-width: 2rem;
    height: 2rem;
    font-size: 0.8rem;
    padding: 0.25rem;
  }
  
  .language-toggle {
    margin-left: 0.5rem;
    height: 2rem;
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
    gap: 0.2rem;
  }
}

/* Better focus styles for accessibility */
.dark-mode-toggle:focus,
.language-toggle:focus,
.btn-primary:focus,
.btn-secondary:focus,
.contact-item:focus {
  outline: 2px solid var(--primary-400);
  outline-offset: 2px;
}

[data-theme="dark"] .dark-mode-toggle:focus,
[data-theme="dark"] .language-toggle:focus,
[data-theme="dark"] .btn-primary:focus,
[data-theme="dark"] .btn-secondary:focus,
[data-theme="dark"] .contact-item:focus {
  outline-color: var(--primary-300);
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  .scroll-to-top,
  .btn-primary,
  .btn-secondary,
  .card,
  .expertise-card,
  .contact-item,
  .blog-card,
  .timeline-content,
  .achievement-item {
    transition: none;
  }
  
  .fade-in {
    animation: none;
    opacity: 1;
    transform: translateY(0);
  }
}

/* Base Styles */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--gray-700);
  background: var(--gray-50);
}

/* Hero Section Styling */
.hero-section {
  background: var(--gradient-hero);
  border-radius: 2rem;
  padding: 3rem 2rem;
  margin: 2rem 0;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%239ca3af" fill-opacity="0.05"><polygon points="60 0 60 60 0 60 0 0"/></g></svg>') repeat;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

/* Card Components */
.card {
  background: white;
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

.research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 2rem 0;
}

/* Expertise Cards */
.expertise-card {
  background: linear-gradient(135deg, white 0%, var(--gray-50) 100%);
  border: 1px solid var(--gray-200);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.expertise-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
}

.expertise-card:nth-child(2)::before {
  background: linear-gradient(135deg, var(--accent-teal), var(--primary-500));
}

.expertise-card:nth-child(3)::before {
  background: linear-gradient(135deg, var(--accent-purple), var(--primary-500));
}

.expertise-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-300);
}

.expertise-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

/* Buttons and Links */
.btn-primary {
  background: var(--gray-50);
  color: var(--primary-600);
  padding: 0.875rem 1.75rem;
  border: 2px solid var(--primary-600);
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  color: white;
  text-decoration: none;
  background: var(--gradient-primary);
  border-color: var(--primary-600);
}

/* Dark mode button styles */
[data-theme="dark"] .btn-primary {
  background: var(--gray-800) !important;
  color: var(--primary-300) !important;
  border-color: var(--primary-400) !important;
}

[data-theme="dark"] .btn-primary:hover {
  background: var(--primary-600) !important;
  color: white !important;
  border-color: var(--primary-500) !important;
}

.btn-secondary {
  background: transparent;
  color: var(--primary-600);
  padding: 0.75rem 1.5rem;
  border: 2px solid var(--primary-200);
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background: var(--primary-50);
  border-color: var(--primary-300);
  color: var(--primary-700);
  text-decoration: none;
}

/* Achievement Badges */
.achievement-list {
  list-style: none;
  padding: 0;
}

.achievement-item {
  background: linear-gradient(135deg, var(--primary-50), white);
  border: 1px solid var(--primary-200);
  border-radius: 0.75rem;
  padding: 1rem 1.5rem;
  margin: 0.75rem 0;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.3s ease;
}

.achievement-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-300);
}

.achievement-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

/* Section Headers */
.section-header {
  position: relative;
  margin: 5rem 0 3rem 0;
  padding-bottom: 1rem;
}

.section-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 3rem;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-subtitle {
  color: var(--gray-600);
  font-size: 1.1rem;
  margin-top: 0.5rem;
  font-weight: 400;
}

/* Metrics Display */
.metrics-container {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 4rem 0 3rem 0;
  padding: 2rem 1.5rem;
  background: white;
  border-radius: 1rem;
  border: 1px solid var(--gray-200);
}

.metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.metric-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-600);
  line-height: 1;
  margin-bottom: 0.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-label {
  color: var(--gray-600);
  font-weight: 500;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Simple Circle-based Languages Section */
.languages-section {
  margin: 3rem 0 4rem 0;
  padding: 2rem 1.5rem;
  background: white;
  border-radius: 1rem;
  border: 1px solid var(--gray-200);
}

.languages-title {
  margin: 0 0 1.5rem 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--gray-700);
  text-align: center;
}

.language-circles {
  display: flex;
  justify-content: center;
  gap: 2rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.language-circle-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
  min-width: 120px;
}

.language-circle {
  position: relative;
  width: 4rem;
  height: 4rem;
  margin-bottom: 0.75rem;
}

.circle-chart {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.circle-progress {
  transition: stroke-dasharray 2s ease-in-out;
}

.circle-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.circle-flag {
  font-size: 1.5rem;
}

.circle-percentage {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--gray-700);
}

.language-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-800);
  margin-bottom: 0.25rem;
}

.language-note {
  font-size: 0.7rem;
  color: var(--gray-500);
}

/* Timeline/Experience */
.timeline {
  position: relative;
  margin: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 2rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient-primary);
}

.timeline-item {
  position: relative;
  margin: 2rem 0;
  padding-left: 4.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 1.5rem;
  top: 0.5rem;
  width: 1rem;
  height: 1rem;
  background: var(--primary-500);
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: var(--shadow-md);
}

.timeline-content {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

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

.contact-item {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: 0.75rem;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
}

.contact-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-300);
  text-decoration: none;
  color: inherit;
}

.contact-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-section {
    padding: 2rem 1rem;
    border-radius: 1rem;
    margin: 1rem 0;
  }
  
  .section-header {
    margin: 3rem 0 2rem 0;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .expertise-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .research-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .contact-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .expertise-card {
    padding: 1.5rem;
  }
  
  .timeline::before {
    left: 1rem;
  }
  
  .timeline-item {
    padding-left: 3rem;
  }
  
  .timeline-item::before {
    left: 0.5rem;
  }
  
  .metrics-container {
    flex-direction: column;
    gap: 1.5rem;
    padding: 1rem;
  }
  
  .metric-number {
    font-size: 2rem;
  }
  
  .language-circles {
    gap: 1.5rem;
  }
  
  .language-circle-item {
    min-width: 100px;
  }
  
  .language-circle {
    width: 3.5rem;
    height: 3.5rem;
  }
  
  .languages-section {
    padding: 1rem;
  }
}

/* Animation Utilities */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.6s ease forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.3s; }

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Blog Post Cards */
.blog-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: 1rem;
  overflow: hidden;
  transition: all 0.3s ease;
  margin-bottom: 1.5rem;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-200);
}

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

.blog-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.blog-meta {
  color: var(--gray-500);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.blog-excerpt {
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: 1rem;
}

/* Additional dark mode styles */
[data-theme="dark"] .section-title {
  color: var(--gray-100) !important;
}

[data-theme="dark"] .section-subtitle {
  color: var(--gray-300) !important;
}

[data-theme="dark"] .blog-title {
  color: var(--gray-100) !important;
}

[data-theme="dark"] .blog-meta {
  color: var(--gray-400) !important;
}

[data-theme="dark"] .blog-excerpt {
  color: var(--gray-300) !important;
}

[data-theme="dark"] .metric-label {
  color: var(--gray-300) !important;
}

[data-theme="dark"] .languages-title {
  color: var(--gray-200) !important;
}

[data-theme="dark"] .language-label {
  color: var(--gray-200) !important;
}

[data-theme="dark"] .language-note {
  color: var(--gray-400) !important;
}

[data-theme="dark"] .circle-percentage {
  color: var(--gray-200) !important;
}

[data-theme="dark"] .achievement-item {
  color: var(--gray-200) !important;
}

[data-theme="dark"] .btn-secondary {
  color: var(--primary-300) !important;
  border-color: var(--primary-400) !important;
}

[data-theme="dark"] .btn-secondary:hover {
  background: var(--gray-700) !important;
  border-color: var(--primary-300) !important;
  color: var(--primary-200) !important;
}

/* Fix remaining text elements in dark mode */
[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
  color: var(--gray-100) !important;
}

[data-theme="dark"] p,
[data-theme="dark"] .wrapper,
[data-theme="dark"] .page-content,
[data-theme="dark"] main {
  color: var(--gray-300) !important;
}

[data-theme="dark"] .pagination .page-item .page-link {
  color: var(--gray-300) !important;
  background: var(--gray-800) !important;
  border-color: var(--gray-600) !important;
}

[data-theme="dark"] .pagination .page-item .page-link:hover {
  color: var(--gray-100) !important;
  background: var(--gray-700) !important;
}

[data-theme="dark"] .pagination .page-item.active .page-link {
  color: var(--gray-100) !important;
  background-color: var(--primary-600) !important;
}

/* Fix site header consistency */
[data-theme="dark"] .site-header .wrapper {
  background: var(--gray-800) !important;
}

[data-theme="dark"] .site-title img {
  border: 2px solid var(--gray-600) !important;
}

[data-theme="dark"] .menu-icon svg path {
  fill: var(--gray-300) !important;
}

[data-theme="dark"] .nav-trigger:checked ~ .trigger {
  background: var(--gray-800) !important;
}

/* Fix inline styled text in dark mode */
[data-theme="dark"] span[style*="color: var(--gray-600)"] {
  color: var(--gray-300) !important;
}

[data-theme="dark"] .research-grid span[style*="color: var(--gray-600)"] {
  color: var(--gray-300) !important;
}

[data-theme="dark"] .contact-item span[style*="color: var(--gray-500)"] {
  color: var(--gray-400) !important;
}

/* Scroll to Top Button */
.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3.5rem;
  height: 3.5rem;
  background: var(--primary-600);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  z-index: 1000;
  
  /* Accessibility improvements */
  outline: none;
  text-decoration: none;
}

.scroll-to-top:focus {
  outline: 2px solid var(--primary-300);
  outline-offset: 2px;
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-to-top:hover {
  background: var(--primary-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.scroll-to-top:active {
  transform: translateY(0);
}

/* Dark mode scroll to top button */
[data-theme="dark"] .scroll-to-top {
  background: var(--primary-500);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

[data-theme="dark"] .scroll-to-top:hover {
  background: var(--primary-400);
  box-shadow: 0 6px 25px rgba(59, 130, 246, 0.4);
}

/* Mobile responsive scroll to top */
@media (max-width: 768px) {
  .scroll-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 3rem;
    height: 3rem;
    font-size: 1rem;
    z-index: 900; /* Lower than mobile menu */
  }
  
  /* Ensure scroll button doesn't interfere with mobile menu */
  .nav-trigger:checked ~ .trigger + .scroll-to-top {
    opacity: 0;
    pointer-events: none;
  }
}

/* Screen reader only text */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Mobile Navigation Improvements */
@media (max-width: 768px) {
  /* Improve mobile header layout */
  .site-header .wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
  }
  
  .site-title {
    font-size: 1.1rem;
    flex: 1;
  }
  
  .site-title img {
    height: 28px !important;
    width: 28px !important;
    margin-right: 6px !important;
  }
  
  /* Fix mobile navigation trigger area */
  .site-nav {
    position: relative;
  }
  
  .nav-trigger {
    display: none;
  }
  
  .nav-trigger ~ label {
    display: block;
    float: right;
    width: 36px;
    height: 36px;
    z-index: 2;
    cursor: pointer;
    padding: 6px;
  }
  
  .menu-icon {
    display: block;
    float: right;
    width: 24px;
    height: 24px;
    line-height: 0;
    text-align: center;
  }
  
  .menu-icon svg {
    width: 24px;
    height: 18px;
  }
  
  /* Mobile menu dropdown */
  .site-nav .trigger {
    clear: both;
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    margin-top: 0.5rem;
    min-width: 200px;
    z-index: 1000;
    text-align: left;
  }
  
  .nav-trigger:checked ~ .trigger {
    display: block;
  }
  
  /* Mobile menu items */
  .site-nav .trigger .page-link {
    display: block;
    padding: 0.75rem 0;
    color: var(--gray-700);
    text-decoration: none;
    border-bottom: 1px solid var(--gray-200);
    font-weight: 500;
  }
  
  .site-nav .trigger .page-link:last-of-type {
    border-bottom: none;
    margin-bottom: 0.5rem;
  }
  
  .site-nav .trigger .page-link:hover {
    color: var(--primary-600);
  }
  
  /* Mobile toggle buttons container */
  .mobile-toggles {
    display: flex !important;
    gap: 0.5rem;
    justify-content: center;
    padding-top: 0.5rem;
    border-top: 1px solid var(--gray-200);
    margin-top: 0.5rem;
  }
  
  .mobile-toggles .dark-mode-toggle,
  .mobile-toggles .language-toggle {
    margin: 0;
    margin-left: 0 !important;
  }
  
  /* Dark mode mobile navigation */
  [data-theme="dark"] .site-nav .trigger {
    background: var(--gray-800);
    border-color: var(--gray-600);
  }
  
  [data-theme="dark"] .site-nav .trigger .page-link {
    color: var(--gray-300);
    border-bottom-color: var(--gray-600);
  }
  
  [data-theme="dark"] .site-nav .trigger .page-link:hover {
    color: var(--primary-400);
  }
  
  [data-theme="dark"] .mobile-toggles {
    border-top-color: var(--gray-600);
  }
  
  [data-theme="dark"] .menu-icon svg path {
    fill: var(--gray-300);
  }
  
  /* Ensure mobile nav doesn't interfere with content */
  .site-nav .nav-trigger:checked ~ .trigger {
    animation: slideDown 0.2s ease-out;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}