/* ================================
   ACADEMIC WEBSITE - MAIN STYLES
   ================================ */

/* Bliss Pro Font Faces */
@font-face {
  font-family: 'Bliss Pro';
  src: url('../fonts/BlissPro-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}


@font-face {
  font-family: 'Bliss Pro';
  src: url('../fonts/BlissPro-Italic.ttf') format('truetype');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Bliss Pro';
  src: url('../fonts/BlissPro-Medium - Bliss Pro - Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Bliss Pro';
  src: url('../fonts/BlissPro-MediumItalic - Bliss Pro - Medium Italic.ttf') format('truetype');
  font-weight: 500;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Bliss Pro';
  src: url('../fonts/BlissPro-ExtraBold - Bliss Pro - ExtraBold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Bliss Pro';
  src: url('../fonts/BlissPro-BoldItalic.ttf') format('truetype');
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Bliss Pro';
  src: url('../fonts/BlissPro-Light - Bliss Pro - Light.ttf') format('truetype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Bliss Pro';
  src: url('../fonts/BlissPro-LightItalic - Bliss Pro - Light Italic.ttf') format('truetype');
  font-weight: 300;
  font-style: italic;
  font-display: swap;
}

/* Prevent transition on page load */
.no-transition * {
  transition: none !important;
}

/* CSS Variables */
:root {
  /* Colors */
  --primary-color: #2c5aa0;
  --secondary-color: #4a90e2;
  --accent-color: #e74c3c;
  --text-color: #333;
  --text-light: #666;
  --background: #ffffff;
  --background-alt: #f8f9fa;
  --border-color: #e1e4e8;
  --shadow: rgba(0, 0, 0, 0.1);
  
  /* Fonts */
  --font-sans: 'Bliss Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji', sans-serif;
  --font-serif: 'Bliss Pro', Georgia, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji', serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Transitions */
  --transition: all 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --primary-color: #5a9fd4;
  --secondary-color: #7db3e8;
  --accent-color: #ff6b6b;
  --text-color: #e4e4e4;
  --text-light: #b0b0b0;
  --background: #1a1a1a;
  --background-alt: #2d2d2d;
  --border-color: #404040;
  --shadow: rgba(0, 0, 0, 0.5);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

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

body {
  font-family: var(--font-sans);
  color: var(--text-color);
  line-height: 1.6;
  background: var(--background);
  -webkit-font-feature-settings: "liga" 1;
  font-feature-settings: "liga" 1;
  text-rendering: optimizeLegibility;
}

body.mobile-menu-open {
  overflow: hidden;
  position: fixed;
  width: 100%;
}

/* Twemoji styling */
img.emoji {
  height: 1.2em;
  width: 1.2em;
  margin: 0 .05em 0 .1em;
  vertical-align: -0.2em;
  display: inline-block;
}


h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

[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(--secondary-color);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* Header */
.site-header {
  background: var(--background);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px var(--shadow);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.site-branding {
  flex: 1;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.site-tagline {
  font-size: 0.875rem;
  color: var(--text-light);
  margin: 0;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: 1001;
  position: relative;
}

.mobile-menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--primary-color);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Animated hamburger icon */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

.main-navigation {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transition: all 0.3s ease;
}

.main-navigation ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  margin: 0;
  padding: 0;
  align-items: center;
}

.main-navigation li {
  display: flex;
  align-items: center;
}

.main-navigation a {
  color: var(--text-color);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
}

.main-navigation a:hover,
.main-navigation a.active {
  background: var(--background-alt);
  color: var(--primary-color);
  text-decoration: none;
}

/* Footer */
.site-footer {
  background: var(--background-alt);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
}

.social-links a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--background);
  border-radius: var(--radius-md);
  color: var(--primary-color);
  font-size: 1.25rem;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  font-size: 0.875rem;
  color: var(--text-light);
}

/* Main Content */
.main-content {
  min-height: 70vh;
  padding: var(--spacing-xl) 0;
}

/* Page Header */
.page-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-color);
}

.page-header h1 {
  margin-bottom: var(--spacing-xs);
}

.page-header p {
  font-size: 1.125rem;
  color: var(--text-light);
  margin: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--secondary-color);
  border-color: var(--secondary-color);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow);
}

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

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

.btn-secondary {
  background: var(--background-alt);
  color: var(--primary-color);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--background);
  border-color: var(--primary-color);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow);
}

[data-theme="dark"] .btn-secondary {
  background: var(--background);
  color: var(--secondary-color);
  border-color: var(--border-color);
}

[data-theme="dark"] .btn-secondary:hover {
  background: var(--background-alt);
  border-color: var(--secondary-color);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  padding: var(--spacing-xl) 0;
  margin-bottom: var(--spacing-xl);
  transition: background 0.3s ease;
}

[data-theme="dark"] .hero {
  background: linear-gradient(135deg, #2d2d2d 0%, #1a1a1a 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.hero-title {
  font-size: 1.5rem;
  color: var(--secondary-color);
  margin-bottom: var(--spacing-xs);
}

.hero-institution {
  font-size: 1.125rem;
  color: var(--text-light);
  margin-bottom: var(--spacing-xs);
}

.hero-institution2 {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
  font-style: italic;
}

.hero-institution a,
.hero-institution2 a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

.hero-institution a:hover,
.hero-institution2 a:hover {
  text-decoration: underline;
  color: var(--secondary-color);
}

.hero-bio {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.profile-photo {
  width: 100%;
  max-width: 300px;
  aspect-ratio: 1 / 1; /* Makes it square */
  border-radius: 50%; /* Makes it circular */
  box-shadow: 0 8px 16px var(--shadow);
  object-fit: cover; /* Ensures image fills the circle properly */
}

[data-theme="dark"] .profile-photo {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.6);
  border: 3px solid var(--border-color);
  border-radius: 50%; /* Keeps it circular in dark mode */
}

/* Sections */
section {
  margin-bottom: var(--spacing-xl);
}

section h2 {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

/* Interest Cards */
.interests-grid,
.areas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.interest-card,
.area-card {
  padding: var(--spacing-md);
  background: var(--background-alt);
  border-radius: var(--radius-md);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.interest-card:hover,
.area-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px var(--shadow);
  border-color: var(--secondary-color);
}

.interest-card i,
.area-card i {
  font-size: 2.5rem;
  color: var(--secondary-color);
  margin-bottom: var(--spacing-sm);
}

.interest-card h3,
.area-card h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.interest-card p,
.area-card p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin: 0;
}

/* News Items */
.news-list {
  display: grid;
  gap: var(--spacing-md);
}

.news-item {
  padding: var(--spacing-md);
  background: var(--background-alt);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--secondary-color);
}

.news-date {
  font-size: 0.875rem;
  color: var(--text-light);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.news-item h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
}

.read-more,
.view-all {
  color: var(--secondary-color);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.view-all {
  display: block;
  text-align: center;
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  background: var(--background-alt);
  border-radius: var(--radius-md);
}

/* Publications */
.bibliography {
  list-style: none;
}

.bibliography li {
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  background: var(--background-alt);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--secondary-color);
  overflow: hidden;
  width: 100%;
  box-sizing: border-box;
}

.publication-item {
  overflow: hidden;
  width: 100%;
  box-sizing: border-box;
}

.publication-content {
  overflow: hidden;
  width: 100%;
  box-sizing: border-box;
}

.publication-meta-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-light);
}

.publication-meta-badge .pub-year {
  font-weight: 600;
  color: var(--primary-color);
}

.publication-meta-badge .pub-type-sep {
  color: var(--border-color);
}

.publication-meta-badge .pub-type {
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.pub-link {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  margin-right: 0.5rem;
  margin-top: 0.5rem;
  background: white;
  color: var(--primary-color);
  text-decoration: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  transition: var(--transition);
  cursor: pointer;
  font-family: inherit;
}

[data-theme="dark"] .pub-link {
  background: var(--background);
  color: var(--secondary-color);
  border-color: var(--border-color);
}

.pub-link:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.abstract-toggle {
  font-family: inherit;
}

.abstract-content {
  margin-top: 1rem;
  padding: 1rem;
  background: white;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary-color);
  line-height: 1.6;
  color: var(--text-color);
}

[data-theme="dark"] .abstract-content {
  background: var(--background);
  border-left: 3px solid var(--secondary-color);
  border-color: var(--border-color);
}

.abstract-content p {
  margin: 0;
  text-align: justify;
  color: var(--text-color);
}

/* Publication Keywords Display */
.publication-keywords {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.5rem 0 1rem 0;
  padding: 0.5rem 0;
  flex-wrap: wrap;
}

.publication-keywords i {
  color: var(--secondary-color);
  font-size: 0.9rem;
}

.keywords-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.875rem;
}

/* Individual keyword badges */
.publication-keywords .keywords-list::before {
  content: '';
}

/* Style keywords as badges */
.keywords-list {
  color: var(--text-light);
}

/* If you want individual keyword badges, use this approach instead */
.keyword-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--background-alt);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--text-color);
  transition: all 0.2s ease;
}

.keyword-badge:hover {
  background: var(--secondary-color);
  color: white;
  border-color: var(--secondary-color);
}

[data-theme="dark"] .keyword-badge {
  background: rgba(93, 173, 226, 0.1);
  border-color: rgba(93, 173, 226, 0.3);
}

[data-theme="dark"] .keyword-badge:hover {
  background: var(--secondary-color);
  border-color: var(--secondary-color);
}

/* Cite dropdown styles */
.cite-dropdown {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px var(--shadow);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  box-sizing: border-box;
}

[data-theme="dark"] .cite-dropdown {
  background: var(--background);
  border-color: var(--border-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.cite-tabs {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: var(--spacing-xs);
  flex-wrap: wrap;
}

.cite-tab {
  padding: var(--spacing-xs) var(--spacing-md);
  background: transparent;
  border: none;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-light);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: var(--transition);
  font-size: 0.875rem;
}

.cite-tab:hover {
  background: var(--background-alt);
  color: var(--primary-color);
}

[data-theme="dark"] .cite-tab:hover {
  background: var(--background-alt);
  color: var(--secondary-color);
}

.cite-tab.active {
  color: var(--primary-color);
  border-bottom: 2px solid var(--primary-color);
  margin-bottom: -2px;
}

[data-theme="dark"] .cite-tab.active {
  color: var(--secondary-color);
  border-bottom-color: var(--secondary-color);
}

.cite-format {
  position: relative;
  overflow: hidden;
  width: 100%;
  box-sizing: border-box;
}

.citation-text {
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  padding: 1rem;
  background: white;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary-color);
  line-height: 1.6;
  color: var(--text-color);
  word-wrap: break-word;
  overflow-wrap: break-word;
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .citation-text {
  background: var(--background-alt);
  border-left: 3px solid var(--secondary-color);
  color: var(--text-color);
}

.cite-format pre {
  background: var(--background-alt);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  overflow: auto;
  margin: 0.5rem 0 1rem 0;
  font-size: 0.875rem;
  line-height: 1.5;
  max-height: 300px;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .cite-format pre {
  background: #1a1a1a;
  border-color: var(--border-color);
}

.cite-format code {
  font-family: 'Courier New', monospace;
  color: var(--text-color);
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
  display: block;
}

.copy-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin: 0 auto;
}

[data-theme="dark"] .copy-btn {
  background: var(--secondary-color);
  color: var(--background);
}

.copy-btn:hover {
  background: var(--secondary-color);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px var(--shadow);
}

[data-theme="dark"] .copy-btn:hover {
  background: var(--primary-color);
  color: white;
}

.copy-btn i {
  font-size: 0.875rem;
}

/* Ensure venue emphasis works in dark mode */
.publication-details em {
  color: var(--text-color);
  font-style: italic;
}

.publication-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

@media (max-width: 768px) {
  .cite-dropdown {
    max-width: 100%;
  }

  .cite-tabs {
    gap: 0.25rem;
  }

  .cite-tab {
    padding: var(--spacing-xs) 0.5rem;
    font-size: 0.75rem;
  }
}



/* Advanced Filters */
.advanced-filters {
  background: var(--background-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) auto;
  max-width: 900px;
  display: none; /* Hidden by default, toggle to show */
}

.advanced-filters.show {
  display: block;
  animation: slideDown 0.3s ease;
}

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

.filter-group {
  margin-bottom: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.filter-group label {
  font-weight: 600;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.filter-group label i {
  color: var(--secondary-color);
  width: 20px;
}

#year-display {
  color: var(--secondary-color);
  font-weight: 700;
  margin-left: auto;
}

.range-slider {
  position: relative;
  height: 40px;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.range-slider input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  outline: none;
}

.range-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--primary-color);
  cursor: pointer;
  border-radius: 50%;
  border: 2px solid white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.range-slider input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--primary-color);
  cursor: pointer;
  border-radius: 50%;
  border: 2px solid white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

[data-theme="dark"] .range-slider input[type="range"]::-webkit-slider-thumb {
  background: var(--secondary-color);
  border-color: var(--background);
}

[data-theme="dark"] .range-slider input[type="range"]::-moz-range-thumb {
  background: var(--secondary-color);
  border-color: var(--background);
}

.filter-group select {
  padding: var(--spacing-sm);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: white;
  color: var(--text-color);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

[data-theme="dark"] .filter-group select {
  background: var(--background);
  border-color: var(--border-color);
}

.filter-group select:focus {
  outline: none;
  border-color: var(--secondary-color);
}

.reset-filters-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: var(--transition);
  margin-top: var(--spacing-sm);
}

.reset-filters-btn:hover {
  background: #c0392b;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow);
}

.advanced-filters-toggle {
  text-align: center;
  margin: var(--spacing-md) 0;
}

.toggle-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--secondary-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: var(--transition);
}

.toggle-btn:hover {
  background: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow);
}

[data-theme="dark"] .toggle-btn {
  background: var(--primary-color);
}

[data-theme="dark"] .toggle-btn:hover {
  background: var(--secondary-color);
}

@media (max-width: 768px) {
  .advanced-filters {
    padding: var(--spacing-md);
  }

  .range-slider {
    flex-direction: column;
  }
}



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

  .site-header {
    position: sticky;
    top: 0;
  }

  .header-content {
    flex-wrap: wrap;
    position: relative;
  }

  .main-navigation {
    position: fixed;
    top: calc(var(--header-height, 80px));
    left: 0;
    right: 0;
    width: 100vw;
    background: var(--background);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 12px var(--shadow);
    max-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
    z-index: 999;
    -webkit-overflow-scrolling: touch;
    flex-direction: column;
    gap: 0;
  }

  .main-navigation.mobile-open {
    max-height: calc(100vh - var(--header-height, 80px));
    opacity: 1;
    visibility: visible;
    padding: var(--spacing-sm) 0;
  }

  .main-navigation ul {
    flex-direction: column;
    gap: 0;
    padding: 0;
    width: 100%;
  }

  .main-navigation .theme-toggle {
    margin: var(--spacing-md) auto;
    display: flex;
    width: 40px;
    height: 40px;
  }

  .main-navigation li {
    border-bottom: 1px solid var(--border-color);
    width: 100%;
  }

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

  .main-navigation a {
    display: block;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    border-radius: 0;
    width: 100%;
  }

  .main-navigation a:hover,
  .main-navigation a.active {
    background: var(--background-alt);
    padding-left: 2rem;
  }

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

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

  .profile-photo {
    margin: 0 auto;
  }

  .interests-grid,
  .areas-grid {
    grid-template-columns: 1fr;
  }
}

/* Print Styles */
@media print {
  .site-header,
  .site-footer,
  .mobile-menu-toggle,
  .btn,
  .hero-buttons,
  .cv-actions {
    display: none;
  }
  
  body {
    font-size: 12pt;
  }
  
  .container {
    max-width: 100%;
  }
}

/* ============================
   PUBLICATIONS PAGE STYLES
   ============================ */

.publications-page {
  margin-top: var(--spacing-lg);
}

.filter-controls {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
  justify-content: center;
}

.filter-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  border: 2px solid var(--border-color);
  background: white;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-color);
}

[data-theme="dark"] .filter-btn {
  background: var(--background-alt);
  border-color: var(--border-color);
  color: var(--text-light);
}

.filter-btn:hover {
  border-color: var(--secondary-color);
  background: var(--background-alt);
  color: var(--primary-color);
}

[data-theme="dark"] .filter-btn:hover {
  background: var(--background);
  border-color: var(--secondary-color);
  color: var(--secondary-color);
}

.filter-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

[data-theme="dark"] .filter-btn.active {
  background: var(--secondary-color);
  color: var(--background);
  border-color: var(--secondary-color);
}

.search-box {
  position: relative;
  max-width: 600px;
  margin: var(--spacing-md) auto;
}

.search-box input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-xl) var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: var(--transition);
  background: white;
  color: var(--text-color);
}

[data-theme="dark"] .search-box input {
  background: var(--background-alt);
  border-color: var(--border-color);
  color: var(--text-color);
}

.search-box input::placeholder {
  color: var(--text-light);
}

.search-box input:focus {
  outline: none;
  border-color: var(--secondary-color);
  background: white;
}

[data-theme="dark"] .search-box input:focus {
  background: var(--background);
  border-color: var(--secondary-color);
}

.search-box i {
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  pointer-events: none;
}

.pub-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

.stat-card {
  background: var(--background-alt);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--border-color);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

[data-theme="dark"] .stat-number {
  color: var(--secondary-color);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.publication-section {
  margin-bottom: var(--spacing-xl);
}

.publication-section h2 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--primary-color);
}

[data-theme="dark"] .publication-section h2 {
  color: var(--secondary-color);
}

.export-section {
  background: var(--background-alt);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  text-align: center;
  margin-top: var(--spacing-xl);
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .export-section {
  background: var(--background);
}

.export-section h2 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

[data-theme="dark"] .export-section h2 {
  color: var(--secondary-color);
}

.export-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-md);
}

.export-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

[data-theme="dark"] .export-btn {
  background: var(--secondary-color);
  color: var(--background);
}

.export-btn:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow);
}

[data-theme="dark"] .export-btn:hover {
  background: var(--primary-color);
  color: white;
}

/* ============================
   TEACHING PAGE STYLES
   ============================ */

.teaching-section {
  margin-bottom: var(--spacing-xl);
}

.teaching-intro {
  padding: var(--spacing-md);
  background: var(--background-alt);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

.courses-list {
  display: grid;
  gap: var(--spacing-md);
}

.course-card {
  padding: var(--spacing-md);
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

[data-theme="dark"] .course-card {
  background: var(--background-alt);
  border-color: var(--border-color);
}

.course-card:hover {
  box-shadow: 0 4px 8px var(--shadow);
  border-color: var(--secondary-color);
  transform: translateY(-2px);
}

.course-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
  color: var(--primary-color);
}

[data-theme="dark"] .course-card h3 {
  color: var(--secondary-color);
}

.course-short {
  font-size: 0.875rem;
  color: var(--text-light);
  font-style: italic;
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin: var(--spacing-sm) 0;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--text-light);
  font-size: 0.9rem;
}

.meta-item i {
  color: var(--secondary-color);
  width: 16px;
}

.course-details {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.detail-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  background: var(--background-alt);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .detail-badge {
  background: var(--background);
  border-color: var(--border-color);
  color: var(--text-light);
}

.detail-badge i {
  color: var(--secondary-color);
}

.lab-card {
  border-left: 4px solid var(--accent-color);
}

.theses-subsection {
  margin-bottom: var(--spacing-lg);
}

.theses-subsection h3 {
  font-size: 1.25rem;
  color: var(--secondary-color);
  margin-bottom: var(--spacing-md);
}

[data-theme="dark"] .theses-subsection h3 {
  color: var(--secondary-color);
}

.theses-list {
  display: grid;
  gap: var(--spacing-sm);
}

.thesis-item {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--background-alt);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--secondary-color);
  color: var(--text-color);
}

[data-theme="dark"] .thesis-item {
  background: var(--background);
  border-color: var(--secondary-color);
}

.thesis-author {
  font-weight: 600;
  color: var(--primary-color);
}

[data-theme="dark"] .thesis-author {
  color: var(--secondary-color);
}

.thesis-title {
  font-style: italic;
  margin: var(--spacing-xs) 0;
  color: var(--text-color);
}

.thesis-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--text-light);
}

.thesis-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.thesis-meta i {
  color: var(--secondary-color);
}

.no-items {
  text-align: center;
  padding: var(--spacing-md);
  color: var(--text-light);
  font-style: italic;
}

.teaching-stats {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.teaching-stats h2 {
  color: white;
  border-bottom: none;
  margin-bottom: var(--spacing-lg);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.stat-box {
  padding: var(--spacing-md);
}

.stat-box .stat-number {
  color: white;
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.stat-box .stat-label {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.teaching-section h2 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

[data-theme="dark"] .teaching-section h2 {
  color: var(--secondary-color);
}

/* ============================
   RESEARCH/PROJECTS STYLES
   ============================ */

.research-overview {
  background: var(--background-alt);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-xl);
}

.projects-grid {
  display: grid;
  gap: var(--spacing-lg);
}

.project-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  transition: var(--transition);
}

[data-theme="dark"] .project-card {
  background: var(--background-alt);
  border-color: var(--border-color);
}

.project-card:hover {
  box-shadow: 0 8px 16px var(--shadow);
}

.project-card.active {
  border-left: 4px solid #27ae60;
}

[data-theme="dark"] .project-card.active {
  border-left: 4px solid #2ecc71;
}

.project-card.completed {
  border-left: 4px solid var(--text-light);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: var(--spacing-md);
  gap: var(--spacing-md);
}

.project-header h3 {
  flex: 1;
  margin: 0;
  color: var(--primary-color);
}

[data-theme="dark"] .project-header h3 {
  color: var(--secondary-color);
}

.project-header a {
  color: var(--primary-color);
  text-decoration: none;
}

[data-theme="dark"] .project-header a {
  color: var(--secondary-color);
}

.project-header a:hover {
  color: var(--secondary-color);
  text-decoration: underline;
}

.project-status {
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
}

.project-status.active {
  background: #27ae60;
  color: white;
}

[data-theme="dark"] .project-status.active {
  background: #2ecc71;
  color: #1a1a1a;
}

.project-status.completed {
  background: var(--text-light);
  color: white;
}

.project-meta {
  display: grid;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--background-alt);
  border-radius: var(--radius-sm);
}

[data-theme="dark"] .project-meta {
  background: var(--background);
  border: 1px solid var(--border-color);
}

.meta-row {
  display: flex;
  gap: var(--spacing-sm);
}

.meta-label {
  font-weight: 600;
  color: var(--text-color);
  min-width: 100px;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.meta-label i {
  color: var(--secondary-color);
  width: 16px;
}

.meta-value {
  color: var(--text-light);
  flex: 1;
}

.project-description {
  margin: var(--spacing-md) 0;
  line-height: 1.7;
  color: var(--text-color);
}

.project-technologies {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin: var(--spacing-md) 0;
}

.tech-badge {
  padding: 4px 12px;
  background: var(--secondary-color);
  color: white;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
}

[data-theme="dark"] .tech-badge {
  background: var(--primary-color);
  color: white;
}

.project-collaborators {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  color: var(--text-color);
}

.project-collaborators strong {
  color: var(--text-color);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.project-collaborators ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  list-style: none;
  margin-top: var(--spacing-xs);
  padding: 0;
}

.project-collaborators li {
  padding: 4px 12px;
  background: var(--background-alt);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-color);
}

[data-theme="dark"] .project-collaborators li {
  background: var(--background);
  border: 1px solid var(--border-color);
}


.projects-section h2 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
}

[data-theme="dark"] .projects-section h2 {
  color: var(--secondary-color);
}

.projects-section h2 i {
  color: var(--secondary-color);
}

/* ============================
   SERVICE PAGE STYLES
   ============================ */

.service-section {
  margin-bottom: var(--spacing-xl);
}

.service-list {
  display: grid;
  gap: var(--spacing-md);
}

.service-item {
  padding: var(--spacing-md);
  background: var(--background-alt);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--secondary-color);
  color: var(--text-color);
}

.service-role {
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

[data-theme="dark"] .service-role {
  color: var(--secondary-color);
}

.service-venue {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
  color: var(--text-color);
}

.service-detail {
  display: block;
  font-style: italic;
  color: var(--text-light);
  font-size: 0.9rem;
}

.service-period {
  font-size: 0.875rem;
  color: var(--text-light);
}

.reviewing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.review-card {
  padding: var(--spacing-md);
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

[data-theme="dark"] .review-card {
  background: var(--background-alt);
  border-color: var(--border-color);
}

.review-card:hover {
  box-shadow: 0 4px 8px var(--shadow);
  border-color: var(--secondary-color);
  transform: translateY(-2px);
}

.review-card h4 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
  font-size: 1.125rem;
}

[data-theme="dark"] .review-card h4 {
  color: var(--secondary-color);
}

.review-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  font-size: 0.9rem;
}

.review-role {
  color: var(--text-color);
  font-weight: 600;
}

.review-years {
  color: var(--text-light);
}

.subsection {
  margin-top: var(--spacing-lg);
}

.subsection h3 {
  font-size: 1.25rem;
  color: var(--secondary-color);
  margin-bottom: var(--spacing-md);
}

.talks-list {
  display: grid;
  gap: var(--spacing-md);
}

.talk-item {
  padding: var(--spacing-md);
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--secondary-color);
}

[data-theme="dark"] .talk-item {
  background: var(--background-alt);
  border-color: var(--border-color);
}

.talk-title {
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

[data-theme="dark"] .talk-title {
  color: var(--secondary-color);
}

.talk-description {
  color: var(--text-light);
  font-style: italic;
  margin-bottom: var(--spacing-xs);
}

.talk-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--text-light);
}

.talk-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.talk-meta i {
  color: var(--secondary-color);
}


.talk-link {
  margin-top: var(--spacing-xs);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--secondary-color);
  text-decoration: none;
}

.talk-link:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

/* Service section headings */
.service-section h2 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

[data-theme="dark"] .service-section h2 {
  color: var(--secondary-color);
}

/* ============================
   NEWS PAGE STYLES
   ============================ */

.news-page {
  margin-top: var(--spacing-lg);
}

.news-filters {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
}

.news-timeline {
  display: grid;
  gap: var(--spacing-lg);
}

.news-card {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

[data-theme="dark"] .news-card {
  background: var(--background-alt);
  border-color: var(--border-color);
}

.news-card:hover {
  box-shadow: 0 4px 8px var(--shadow);
  transform: translateY(-2px);
  border-color: var(--secondary-color);
}

.news-date-badge {
  text-align: center;
  padding: var(--spacing-sm);
  background: var(--primary-color);
  color: white;
  border-radius: var(--radius-md);
  min-width: 80px;
  height: fit-content;
  flex-shrink: 0;
}

[data-theme="dark"] .news-date-badge {
  background: var(--secondary-color);
  color: var(--background);
}

.date-day {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
}

.date-month {
  font-size: 0.875rem;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

.date-year {
  font-size: 0.875rem;
  opacity: 0.9;
  margin-top: 0.25rem;
}

.news-content {
  flex: 1;
}

.news-category-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: var(--spacing-xs);
}

.news-category-tag.publication {
  background: #3498db;
  color: white;
}

[data-theme="dark"] .news-category-tag.publication {
  background: #5dade2;
  color: var(--background);
}

.news-category-tag.award {
  background: #f39c12;
  color: white;
}

[data-theme="dark"] .news-category-tag.award {
  background: #f8b739;
  color: var(--background);
}

.news-category-tag.talk {
  background: #9b59b6;
  color: white;
}

[data-theme="dark"] .news-category-tag.talk {
  background: #bb8fce;
  color: var(--background);
}

.news-category-tag.event {
  background: #27ae60;
  color: white;
}

[data-theme="dark"] .news-category-tag.event {
  background: #52be80;
  color: var(--background);
}

.news-title {
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
  font-size: 1.25rem;
}

[data-theme="dark"] .news-title {
  color: var(--secondary-color);
}

.news-text {
  color: var(--text-color);
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
}

.news-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--spacing-sm);
  color: var(--secondary-color);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.news-link:hover {
  color: var(--primary-color);
  gap: 8px;
}

.news-archive {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--background-alt);
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--border-color);
}

.news-archive h2 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

[data-theme="dark"] .news-archive h2 {
  color: var(--secondary-color);
}

.archive-years {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-md);
}

.year-link {
  padding: var(--spacing-sm) var(--spacing-md);
  background: white;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: var(--transition);
  text-decoration: none;
  color: var(--text-color);
}

[data-theme="dark"] .year-link {
  background: var(--background);
  border-color: var(--border-color);
  color: var(--text-light);
}

.year-link:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  text-decoration: none;
}

[data-theme="dark"] .year-link:hover {
  background: var(--secondary-color);
  color: var(--background);
  border-color: var(--secondary-color);
}

@media (max-width: 768px) {
  .news-card {
    flex-direction: column;
  }

  .news-date-badge {
    width: fit-content;
    align-self: flex-start;
  }
}

/* ============================
   ABOUT/CV PAGE STYLES
   ============================ */

.about-page,
.cv-page {
  max-width: 900px;
  margin: 0 auto;
}

.about-header {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--background-alt);
  border-radius: var(--radius-md);
}

.about-image img {
  width: 100%;
  border-radius: var(--radius-md);
}

.about-intro .title {
  font-size: 1.25rem;
  color: var(--secondary-color);
  margin-bottom: var(--spacing-xs);
}

.about-intro .institution {
  color: var(--text-light);
  margin-bottom: var(--spacing-xs);
}

.about-intro .institution2 {
  color: var(--text-light);
  font-size: 0.9rem;
  font-style: italic;
  margin-bottom: var(--spacing-md);
}

.about-intro .institution a,
.about-intro .institution2 a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

.about-intro .institution a:hover,
.about-intro .institution2 a:hover {
  text-decoration: underline;
}

.contact-info {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.contact-info p {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
}

.bio-section,
.interests-section,
.education-section,
.experience-section,
.awards-section,
.memberships-section,
.cv-section {
  margin-bottom: var(--spacing-xl);
}

.bio-content {
  line-height: 1.8;
}

.interests-list {
  display: grid;
  gap: var(--spacing-md);
}

.interest-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--background-alt);
  border-radius: var(--radius-md);
}

.interest-item i {
  font-size: 2rem;
  color: var(--secondary-color);
}

.timeline {
  position: relative;
  padding-left: var(--spacing-lg);
}

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

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-lg);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -27px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--secondary-color);
  border: 3px solid white;
  box-shadow: 0 0 0 2px var(--border-color);
}

.timeline-date {
  font-weight: 600;
  color: var(--secondary-color);
  margin-bottom: var(--spacing-xs);
}

.timeline-content h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xs);
}

.timeline-content .institution {
  color: var(--text-light);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.timeline-content .description {
  color: var(--text-light);
  line-height: 1.7;
}

.awards-list,
.memberships-list {
  list-style: none;
}

.awards-list li,
.memberships-list li {
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  background: var(--background-alt);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--secondary-color);
}

.cv-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-top: var(--spacing-md);
}

.cv-section {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--border-color);
}

.cv-section:last-child {
  border-bottom: none;
}

.cv-content {
  margin-top: var(--spacing-md);
}

.cv-item {
  margin-bottom: var(--spacing-md);
}

.cv-item-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: var(--spacing-xs);
}

.cv-date {
  color: var(--text-light);
  font-weight: 600;
  white-space: nowrap;
}

.cv-list {
  list-style: none;
  padding-left: var(--spacing-md);
}

.cv-list li {
  padding: var(--spacing-xs) 0;
  position: relative;
}

.cv-list li::before {
  content: '▸';
  position: absolute;
  left: -var(--spacing-md);
  color: var(--secondary-color);
}

.cv-note {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  background: var(--background-alt);
  border-radius: var(--radius-sm);
  text-align: center;
}



/* ============================
   BLOG PAGE STYLES
   ============================ */

.blog-page {
  margin-top: 2rem;
}

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

.blog-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

[data-theme="dark"] .blog-card {
  background: var(--background-alt);
  border-color: var(--border-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .blog-card:hover {
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
}

.blog-card-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.blog-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.blog-card:hover .blog-card-image img {
  transform: scale(1.05);
}

.blog-card-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-meta {
  display: flex;
  gap: 1rem;
  color: var(--text-light);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.blog-card-meta span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.blog-card-meta i {
  color: var(--secondary-color);
}

.blog-card-title {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.blog-card-title a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

[data-theme="dark"] .blog-card-title a {
  color: var(--secondary-color);
}

.blog-card-title a:hover {
  color: var(--secondary-color);
}

[data-theme="dark"] .blog-card-title a:hover {
  color: var(--primary-color);
}

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

.blog-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.blog-tag {
  display: inline-block;
  background: #e8f4f8;
  color: #2980b9;
  padding: 0.25rem 0.75rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid transparent;
}

[data-theme="dark"] .blog-tag {
  background: var(--background);
  color: var(--secondary-color);
  border-color: var(--border-color);
}

.blog-card-link {
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap 0.2s ease;
}

.blog-card-link:hover {
  gap: 0.75rem;
  color: var(--primary-color);
}

.blog-archive {
  background: var(--background-alt);
  padding: 2rem;
  border-radius: 10px;
  margin-top: 3rem;
  border: 1px solid var(--border-color);
}

.blog-archive h2 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

[data-theme="dark"] .blog-archive h2 {
  color: var(--secondary-color);
}

.archive-list {
  display: grid;
  gap: 2rem;
}

.archive-year h3 {
  font-size: 1.4rem;
  color: var(--secondary-color);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
}

.archive-posts {
  list-style: none;
  padding: 0;
}

.archive-posts li {
  padding: 0.5rem 0;
  display: flex;
  gap: 1rem;
  align-items: baseline;
}

.archive-date {
  color: var(--text-light);
  font-size: 0.9rem;
  min-width: 60px;
}

.archive-posts a {
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

.archive-posts a:hover {
  color: var(--secondary-color);
  text-decoration: underline;
}

.no-posts {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-light);
}

.no-posts p {
  font-size: 1.1rem;
  margin: 0;
}

@media (max-width: 768px) {
  .blog-posts-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

  .blog-archive {
    padding: 1.5rem;
  }

  .archive-posts li {
    flex-direction: column;
    gap: 0.25rem;
  }
}


/* ============================
   BLOG POST STYLES
   ============================ */

.blog-post {
  max-width: 800px;
  margin: 2rem auto;
  padding: 2rem 1rem;
}

.blog-post-header {
  margin-bottom: 3rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 2rem;
}

.blog-post-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
  color: var(--primary-color);
}

[data-theme="dark"] .blog-post-title {
  color: var(--secondary-color);
}

.blog-post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.blog-post-meta span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.blog-post-meta i {
  color: var(--secondary-color);
}

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

.blog-post-excerpt {
  font-size: 1.1rem;
  color: var(--text-color);
  font-style: italic;
  margin-top: 1rem;
  padding: 1rem;
  background: var(--background-alt);
  border-left: 4px solid var(--secondary-color);
  border-radius: var(--radius-sm);
}

.blog-post-featured-image {
  margin-bottom: 2rem;
  border-radius: 8px;
  overflow: hidden;
}

.blog-post-featured-image img {
  width: 100%;
  height: auto;
  display: block;
}

.blog-post-content {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-color);
}

.blog-post-content h2 {
  font-size: 1.8rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

[data-theme="dark"] .blog-post-content h2 {
  color: var(--secondary-color);
}

.blog-post-content h3 {
  font-size: 1.4rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--primary-color);
}

[data-theme="dark"] .blog-post-content h3 {
  color: var(--secondary-color);
}

.blog-post-content h4 {
  font-size: 1.2rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

[data-theme="dark"] .blog-post-content h4 {
  color: var(--secondary-color);
}

.blog-post-content p {
  margin-bottom: 1.5rem;
}

.blog-post-content img {
  max-width: 100%;
  height: auto;
  margin: 2rem auto;
  display: block;
  border-radius: 8px;
  box-shadow: 0 4px 6px var(--shadow);
}

.blog-post-content a {
  color: var(--secondary-color);
  text-decoration: underline;
}

.blog-post-content a:hover {
  color: var(--primary-color);
}

.blog-post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.95rem;
  background: var(--background);
  border: 1px solid var(--border-color);
}

.blog-post-content table th,
.blog-post-content table td {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  text-align: left;
  color: var(--text-color);
}

.blog-post-content table th {
  background: var(--background-alt);
  font-weight: 600;
  color: var(--primary-color);
}

[data-theme="dark"] .blog-post-content table th {
  color: var(--secondary-color);
}

.blog-post-content table tr:nth-child(even) {
  background: var(--background-alt);
}

.blog-post-content blockquote {
  margin: 2rem 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--secondary-color);
  background: var(--background-alt);
  font-style: italic;
  color: var(--text-light);
  border-radius: var(--radius-sm);
}

.blog-post-content code {
  background: var(--background-alt);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
  color: var(--accent-color);
  border: 1px solid var(--border-color);
}

.blog-post-content pre {
  background: #2c3e50;
  color: #ecf0f1;
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .blog-post-content pre {
  background: #1a1a1a;
  border-color: var(--border-color);
}

.blog-post-content pre code {
  background: none;
  color: inherit;
  padding: 0;
  border: none;
}

.blog-post-content ul,
.blog-post-content ol {
  margin: 1.5rem 0;
  padding-left: 2rem;
}

.blog-post-content li {
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.blog-post-content hr {
  border: none;
  border-top: 2px solid var(--border-color);
  margin: 2rem 0;
}

.blog-post-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 2px solid var(--border-color);
}

.blog-post-share {
  margin-bottom: 2rem;
}

.blog-post-share h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

[data-theme="dark"] .blog-post-share h3 {
  color: var(--secondary-color);
}

.share-buttons {
  display: flex;
  gap: 1rem;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: white;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.share-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.share-btn.twitter {
  background: #1da1f2;
}

.share-btn.linkedin {
  background: #0077b5;
}

.share-btn.email {
  background: #666;
}

[data-theme="dark"] .share-btn.email {
  background: #888;
}

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

.blog-nav-link {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s ease, background-color 0.2s ease;
  background: var(--background);
}

.blog-nav-link:hover {
  border-color: var(--secondary-color);
  background-color: var(--background-alt);
}

.blog-nav-link.next {
  text-align: right;
}

.nav-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 0.25rem;
}

.nav-title {
  font-weight: 600;
  color: var(--text-color);
}

.back-to-blog {
  text-align: center;
  margin-top: 2rem;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--secondary-color);
  color: white;
  text-decoration: none;
  border-radius: 5px;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.btn-back:hover {
  background: var(--primary-color);
}

/* KaTeX styling improvements */
.blog-post-content .katex-display {
  margin: 2rem 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.blog-post-content .katex {
  font-size: 1.1em;
}

[data-theme="dark"] .blog-post-content .katex {
  color: var(--text-color);
}

@media (max-width: 768px) {
  .blog-post {
    padding: 1rem;
  }

  .blog-post-title {
    font-size: 2rem;
  }

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

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

  .blog-nav-link.next {
    text-align: left;
  }

  .blog-post-content {
    font-size: 1rem;
  }

  .blog-post-content pre {
    padding: 1rem;
    font-size: 0.85rem;
  }
}


/* ============================
   DARK MODE TOGGLE
   ============================ */

.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  color: var(--text-color);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  transition: var(--transition);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--background-alt);
  border-color: var(--primary-color);
  transform: rotate(15deg);
}

.theme-toggle i {
  transition: transform 0.3s ease;
}

/* ============================
   RESPONSIVE DESIGN
   ============================ */

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .site-header {
    position: sticky;
    top: 0;
  }

  .header-content {
    flex-wrap: wrap;
    position: relative;
  }

  .mobile-menu-toggle {
    margin-left: auto;
  }

  .about-header {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .about-image img {
    margin: 0 auto;
    max-width: 200px;
  }
  
  .news-card {
    flex-direction: column;
  }
  
  .news-date-badge {
    width: fit-content;
  }
  
  .project-header {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .filter-controls,
  .news-filters {
    justify-content: flex-start;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ============================
   PRINT STYLES
   ============================ */

@media print {
  /* Hide navigation and non-essential elements */
  .site-header,
  .site-footer,
  .page-header .cv-actions,
  .mobile-menu-toggle,
  .hero-buttons,
  .cv-note {
    display: none !important;
  }
  
  /* Reset page margins */
  @page {
    margin: 1cm;
    size: A4;
  }
  
  body {
    font-size: 11pt;
    line-height: 1.4;
    background: white !important;
    color: black !important;
  }
  
  .container {
    width: 100% !important;
    max-width: none !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  
  /* CV specific print styles */
  .cv-page {
    background: white !important;
  }
  
  .cv-section {
    break-inside: avoid;
    page-break-inside: avoid;
    margin-bottom: 1.5em;
  }
  
  .cv-section h2 {
    color: #2c5aa0 !important;
    font-size: 14pt;
    margin-bottom: 0.5em;
    border-bottom: 1pt solid #2c5aa0;
    padding-bottom: 0.2em;
  }
  
  .cv-item {
    margin-bottom: 1em;
    break-inside: avoid;
  }
  
  .cv-item-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.3em;
  }
  
  .cv-item-header strong {
    font-weight: bold;
  }
  
  .cv-date {
    font-style: italic;
    color: #666 !important;
  }
  
  /* Links in print */
  a {
    color: black !important;
    text-decoration: none !important;
  }
  
  a[href]:after {
    content: " (" attr(href) ")";
    font-size: 9pt;
    color: #666;
  }
  
  /* Don't print URLs for internal links */
  a[href^="#"]:after,
  a[href^="/"]:after {
    content: "";
  }
  
  /* Publication links */
  .publication-links a:after {
    content: "";
  }
  
  /* Font awesome icons */
  i.fas,
  i.fab {
    display: none;
  }
  
  /* Page header for print */
  .page-header h1 {
    font-size: 18pt;
    text-align: center;
    margin-bottom: 1em;
  }
  
  /* Ensure good breaks */
  .cv-section:first-of-type {
    page-break-before: avoid;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
  
  .cv-item,
  .service-item,
  .publication-item {
    page-break-inside: avoid;
  }
}



/* ============================
   ENHANCED TAG CLOUD SECTION
   ============================ */

.tag-cloud-section {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-xl) 0;
  background: linear-gradient(135deg, var(--background-alt) 0%, var(--background) 100%);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.tag-cloud-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(74, 144, 226, 0.05) 0%, transparent 70%);
  animation: cloudPulse 15s ease-in-out infinite;
}

@keyframes cloudPulse {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(5%, 5%) scale(1.1); }
}

.tag-cloud-section h2 {
  text-align: center;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
  position: relative;
  z-index: 1;
}

[data-theme="dark"] .tag-cloud-section h2 {
  color: var(--secondary-color);
}

.section-intro {
  text-align: center;
  color: var(--text-light);
  margin-bottom: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.tag-cloud {
  position: relative;
  z-index: 1;
  padding: var(--spacing-lg);
  min-height: 300px;
}

.tag-cloud-loading {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-light);
  font-size: 1.1rem;
}

.tag-cloud-loading i {
  margin-right: var(--spacing-sm);
  color: var(--secondary-color);
}

.tag-cloud-wrapper {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: linear-gradient(135deg, white 0%, #f8f9fa 100%);
  border: 2px solid transparent;
  border-radius: 50px;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  animation: tagFadeIn 0.6s ease forwards;
  opacity: 0;
}

@keyframes tagFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.8);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

[data-theme="dark"] .tag-item {
  background: linear-gradient(135deg, var(--background) 0%, #252525 100%);
  color: var(--secondary-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.tag-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

.tag-item:hover::before {
  left: 100%;
}

.tag-item:hover {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  border-color: transparent;
  transform: translateY(-6px) scale(1.05);
  box-shadow: 0 12px 24px rgba(74, 144, 226, 0.4);
  text-decoration: none;
}

[data-theme="dark"] .tag-item:hover {
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
  box-shadow: 0 12px 24px rgba(93, 173, 226, 0.3);
}

.tag-text {
  position: relative;
  z-index: 1;
  font-size: inherit;
}

.tag-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  padding: 0 0.5rem;
  background: rgba(74, 144, 226, 0.15);
  border-radius: 50px;
  font-size: 0.8em;
  font-weight: 700;
  color: var(--primary-color);
  transition: all 0.3s ease;
}

[data-theme="dark"] .tag-count {
  background: rgba(93, 173, 226, 0.2);
  color: var(--secondary-color);
}

.tag-item:hover .tag-count {
  background: rgba(255, 255, 255, 0.25);
  color: white;
  transform: scale(1.1);
}

/* Ripple effect */
.tag-ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.6);
  width: 20px;
  height: 20px;
  transform: translate(-50%, -50%) scale(0);
  animation: ripple 0.6s ease-out;
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: translate(-50%, -50%) scale(4);
    opacity: 0;
  }
}

/* Size variations */
.tag-item.size-xs { 
  font-size: 0.8rem; 
  padding: 0.5rem 0.9rem;
}

.tag-item.size-sm { 
  font-size: 0.9rem; 
  padding: 0.6rem 1rem;
}

.tag-item.size-md { 
  font-size: 1rem; 
  padding: 0.75rem 1.25rem;
}

.tag-item.size-lg { 
  font-size: 1.15rem; 
  padding: 0.85rem 1.4rem;
  font-weight: 700;
}

.tag-item.size-xl { 
  font-size: 1.35rem; 
  padding: 1rem 1.6rem;
  font-weight: 700;
}

.tag-item.size-xxl { 
  font-size: 1.6rem; 
  padding: 1.1rem 1.8rem;
  font-weight: 800;
}

/* Shuffle button */
.tag-cloud-toggle {
  display: block;
  margin: var(--spacing-lg) auto 0;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--background);
  color: var(--primary-color);
  border: 2px solid var(--border-color);
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
  font-size: 0.95rem;
}

.tag-cloud-toggle:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

[data-theme="dark"] .tag-cloud-toggle {
  background: var(--background-alt);
  color: var(--secondary-color);
}

[data-theme="dark"] .tag-cloud-toggle:hover {
  background: var(--secondary-color);
  color: var(--background);
  border-color: var(--secondary-color);
}

.tag-cloud-toggle i {
  margin-right: var(--spacing-xs);
  transition: transform 0.3s ease;
}

.tag-cloud-toggle:hover i {
  transform: rotate(180deg);
}

@media (max-width: 768px) {
  .tag-cloud {
    padding: var(--spacing-md);
  }
  
  .tag-cloud-wrapper {
    gap: 0.75rem;
  }
  
  .tag-item.size-xxl { font-size: 1.4rem; padding: 0.9rem 1.5rem; }
  .tag-item.size-xl { font-size: 1.2rem; padding: 0.8rem 1.3rem; }
  .tag-item.size-lg { font-size: 1.1rem; padding: 0.7rem 1.2rem; }
  .tag-item.size-md { font-size: 0.95rem; padding: 0.6rem 1rem; }
  .tag-item.size-sm { font-size: 0.85rem; padding: 0.5rem 0.9rem; }
  .tag-item.size-xs { font-size: 0.75rem; padding: 0.45rem 0.8rem; }
}

/* ============================
   UPCOMING EVENTS SECTION
   ============================ */

.upcoming-events {
  margin-bottom: var(--spacing-xl);
}

.upcoming-events h2 {
  text-align: center;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xl);
}

[data-theme="dark"] .upcoming-events h2 {
  color: var(--secondary-color);
}

.events-timeline {
  display: grid;
  gap: var(--spacing-lg);
  max-width: 900px;
  margin: 0 auto;
}

.event-card {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: white;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .event-card {
  background: var(--background-alt);
  border-color: var(--border-color);
}

.event-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px var(--shadow);
  border-color: var(--secondary-color);
}

.event-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
}

[data-theme="dark"] .event-card::before {
  background: linear-gradient(180deg, var(--secondary-color), var(--primary-color));
}

.event-date-badge {
  flex-shrink: 0;
  text-align: center;
  padding: var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-radius: var(--radius-md);
  min-width: 100px;
  height: fit-content;
  position: relative;
}

.event-date-badge::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid var(--secondary-color);
}

.event-month {
  font-size: 0.875rem;
  text-transform: uppercase;
  font-weight: 600;
  opacity: 0.9;
}

.event-day {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  margin: 0.25rem 0;
}

.event-year {
  font-size: 0.875rem;
  opacity: 0.9;
}

.event-countdown {
  margin-top: 0.5rem;
  padding: 0.25rem 0.5rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.event-content {
  flex: 1;
}

.event-type {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--background-alt);
  color: var(--secondary-color);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: var(--spacing-xs);
}

[data-theme="dark"] .event-type {
  background: var(--background);
  color: var(--secondary-color);
}

.event-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

[data-theme="dark"] .event-title {
  color: var(--secondary-color);
}

.event-venue {
  color: var(--text-color);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.event-venue i {
  color: var(--secondary-color);
}

.event-description {
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

.event-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--text-light);
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--border-color);
}

.event-meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.event-meta-item i {
  color: var(--secondary-color);
}

.event-link {
  margin-top: var(--spacing-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--secondary-color);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.event-link:hover {
  color: var(--primary-color);
  gap: 0.75rem;
}

.no-events {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-light);
}

.no-events i {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
}

@media (max-width: 768px) {
  .event-card {
    flex-direction: column;
  }
  
  .event-date-badge {
    width: fit-content;
  }
  
  .event-date-badge::after {
    display: none;
  }
}

/* Show More Button */
.tag-cloud-show-more {
  display: block;
  margin: var(--spacing-md) auto;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--background);
  color: var(--secondary-color);
  border: 2px solid var(--border-color);
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.tag-cloud-show-more:hover {
  background: var(--secondary-color);
  color: white;
  border-color: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

[data-theme="dark"] .tag-cloud-show-more {
  background: var(--background-alt);
  color: var(--secondary-color);
}

[data-theme="dark"] .tag-cloud-show-more:hover {
  background: var(--secondary-color);
  color: var(--background);
  border-color: var(--secondary-color);
}

.tag-cloud-show-more i {
  margin-right: var(--spacing-xs);
  transition: transform 0.3s ease;
}

.tag-cloud-show-more:hover i {
  transform: translateY(3px);
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(0.95); }
}

/* Button container layout */
.tag-cloud-section .tag-cloud {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.tag-cloud-section .tag-cloud > button {
  order: 10; /* Ensure buttons appear at the end */
}




/* ============================
   DROPDOWN MENU
   ============================ */

.nav-dropdown {
  position: relative;
  display: flex;
  align-items: center;
}

.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  height: 100%;
}

.dropdown-toggle i {
  font-size: 0.75rem;
  transition: transform 0.3s ease;
}

.nav-dropdown:hover .dropdown-toggle i {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--background);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px var(--shadow);
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 1000;
  list-style: none;
  padding: 0.5rem 0;
  margin-top: 0.5rem;
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li {
  margin: 0;
}

.dropdown-menu a {
  display: block;
  padding: 0.75rem 1.25rem;
  color: var(--text-color);
  text-decoration: none;
  transition: all 0.2s ease;
  border-radius: 0;
}

.dropdown-menu a:hover {
  background: var(--background-alt);
  color: var(--primary-color);
  padding-left: 1.5rem;
}

/* Mobile Dropdown */
@media (max-width: 768px) {
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-left: 3px solid var(--border-color);
    margin-left: 1rem;
    margin-top: 0.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  
  .nav-dropdown.open .dropdown-menu {
    max-height: 300px;
  }
  
  .dropdown-toggle {
    width: 100%;
    justify-content: space-between;
  }
  
  .dropdown-menu a {
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
  }
}

/* ============================
   EVENTS PAGE
   ============================ */

.events-page {
  padding: var(--spacing-lg) 0;
}

.events-section {
  margin-bottom: var(--spacing-xl);
}

.events-section h2 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-color);
}

.events-section h2 i {
  color: var(--secondary-color);
}

.events-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Event Item */
.event-item {
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--background);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
}

.event-item.upcoming {
  border-left: 4px solid var(--secondary-color);
  background: linear-gradient(135deg, var(--background) 0%, var(--background-alt) 100%);
}

.event-item.past {
  opacity: 0.7;
  border-left: 4px solid var(--text-light);
}

.event-item:hover {
  box-shadow: 0 8px 16px var(--shadow);
  transform: translateY(-2px);
}

.event-item.past:hover {
  opacity: 0.9;
}

/* Event Date Column */
.event-date-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  min-width: 100px;
}

.event-date-badge {
  text-align: center;
  padding: var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-radius: var(--radius-md);
  min-width: 90px;
  box-shadow: 0 4px 8px rgba(74, 144, 226, 0.3);
}

.event-date-badge.past-badge {
  background: linear-gradient(135deg, var(--text-light), #999);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.event-month {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  opacity: 0.9;
}

.event-day {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  margin: 0.25rem 0;
}

.event-year {
  font-size: 0.85rem;
  opacity: 0.9;
}

.event-countdown-small {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--secondary-color);
  text-align: center;
  padding: 0.25rem 0.5rem;
  background: var(--background-alt);
  border-radius: var(--radius-sm);
}

/* Event Details */
.event-details {
  flex: 1;
}

.event-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  flex-wrap: wrap;
}

.event-type-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.event-type-badge.keynote { background: #3498db; color: white; }
.event-type-badge.workshop { background: #9b59b6; color: white; }
.event-type-badge.panel { background: #e74c3c; color: white; }
.event-type-badge.lecture { background: #f39c12; color: white; }
.event-type-badge.talk { background: #27ae60; color: white; }

.event-status {
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.event-status.upcoming-badge {
  background: rgba(74, 144, 226, 0.15);
  color: var(--secondary-color);
  border: 1px solid var(--secondary-color);
}

.event-status.past-badge {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-light);
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .event-status.upcoming-badge {
  background: rgba(93, 173, 226, 0.2);
}

.event-title {
  font-size: 1.35rem;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.event-item.past .event-title {
  color: var(--text-color);
}

.event-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-light);
}

.meta-item i {
  color: var(--secondary-color);
  width: 16px;
}

.event-description {
  color: var(--text-color);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.event-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--secondary-color);
  color: white;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.event-link-btn:hover {
  background: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(74, 144, 226, 0.3);
  text-decoration: none;
}

.event-item.past .event-link-btn {
  background: var(--text-light);
}

.event-item.past .event-link-btn:hover {
  background: var(--text-color);
}

.no-events-message {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-light);
}

.no-events-message i {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

/* Responsive */
@media (max-width: 768px) {
  .event-item {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .event-date-col {
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
    min-width: 0;
  }
  
  .event-meta-grid {
    grid-template-columns: 1fr;
  }
}