/* ===== CSS Variables ===== */
:root {
  --bg-primary: #f6f8fa;
  --bg-secondary: #fff;
  --text-primary: #21243d;
  --text-secondary: #373abd;
  --text-muted: #888bb0;
  --accent: #2d72d9;
  --accent-hover: #1a5bc7;
  --border: #ececff;
  --shadow: rgba(30,32,50,0.06);
  --shadow-hover: rgba(30,32,50,0.12);
  --nav-hover: #e7e9fc;
  --success: #10b981;
  --warning: #f59e0b;
  --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.dark-mode {
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --text-primary: #e8e8e8;
  --text-secondary: #7b9ddb;
  --text-muted: #6b7280;
  --accent: #5c8df6;
  --accent-hover: #7b9ffb;
  --border: #2a2a4a;
  --shadow: rgba(0,0,0,0.4);
  --shadow-hover: rgba(0,0,0,0.6);
  --nav-hover: #1f2a4a;
}

/* ===== Base Styles ===== */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1.10rem;
  line-height: 1.6;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* ===== Mobile Menu Toggle ===== */
.mobile-menu-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1001;
  background: var(--bg-secondary);
  border: 2px solid var(--text-secondary);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mobile-menu-toggle:hover {
  background: var(--nav-hover);
}

/* ===== Navigation ===== */
nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.2rem;
  background: var(--bg-secondary);
  border-bottom: 2.5px solid var(--border);
  padding: 0.95rem 0 0.85rem 0;
  font-size: 1.22rem;
  font-weight: 500;
  letter-spacing: .03em;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px var(--shadow);
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.2em 0.3em 0.15em 0.3em;
  border-bottom: 2.5px solid transparent;
  transition: all 0.2s ease;
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -2.5px;
  left: 0;
  width: 0;
  height: 2.5px;
  background: var(--text-secondary);
  transition: width 0.2s ease;
}

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

nav a.active, nav a:focus, nav a:hover {
  color: var(--text-primary);
}

/* ===== Theme Toggle ===== */
.theme-toggle {
  background: none;
  border: 2px solid var(--text-secondary);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background: var(--nav-hover);
  transform: rotate(15deg) scale(1.1);
}

/* ===== Container ===== */
.container.main-flex {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.3rem 1.1rem;
}

/* ===== Sidebar ===== */
.sidebar {
  width: 300px;
  min-width: 300px;
  background: var(--bg-secondary);
  border-radius: 16px;
  box-shadow: 0 4px 20px var(--shadow);
  padding: 2rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--border);
  position: sticky;
  top: 100px;
  align-self: flex-start;
  max-height: calc(100vh - 120px);
  overflow: hidden; /* Hide overflow on parent */
}

.sidebar:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px var(--shadow-hover);
}

/* Scrollable inner container */
.sidebar-content {
  width: 100%;
  overflow-y: auto;
  padding-right: 0.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-primary);
  max-height: inherit;
}

/* Firefox - Hide by default, show on hover */
.sidebar-content {
  scrollbar-color: transparent transparent;
}

.sidebar:hover .sidebar-content {
  scrollbar-color: var(--accent) var(--bg-primary);
}

/* Webkit (Chrome, Safari, Edge) - Hide by default, show on hover */
.sidebar-content::-webkit-scrollbar {
  width: 6px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sidebar:hover .sidebar-content::-webkit-scrollbar {
  opacity: 1;
}

.sidebar-content::-webkit-scrollbar-track {
  background: var(--bg-primary);
  border-radius: 10px;
}

.sidebar-content::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 10px;
  transition: background 0.3s ease;
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Ensure content fits */
.sidebar > div {
  width: 100%;
}

/* Responsive: Remove sticky on mobile */
@media (max-width: 900px) {
  .sidebar {
    width: 100%;
    position: static;
    max-height: none;
    overflow: visible;
    margin-bottom: 2rem;
  }
  
  .sidebar-content {
    overflow: visible;
    max-height: none;
  }
  
  .sidebar-content::-webkit-scrollbar {
    display: none;
  }
}

/* Quick Stats */
.quick-stats {
  display: flex;
  justify-content: space-around;
  width: 100%;
  padding: 1rem 0;
  margin: 0.5rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.stat-number {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* Profile Pic */
.profile-pic-tiny {
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 50%;
  border: 2.5px solid var(--border);
  box-shadow: 0 2px 7px rgba(30,32,50,.11);
  margin-bottom: 0.75rem;
  transition: transform 0.3s ease;
}

.profile-pic-tiny:hover {
  transform: scale(1.08) rotate(2deg);
}

/* Sidebar Name & Title */
.sidebar-name {
  font-size: 1.55rem;
  font-weight: 800;
  margin: 0.4rem 0 0.12rem 0;
  color: var(--text-primary);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.sidebar-title {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 1rem;
  line-height: 1.4;
  min-height: 2.8em;
  display: block;
  /* Clean display, no animation issues */
}

/* Sidebar Contact */
.sidebar-contact {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-top: 0.5rem;
  line-height: 1.8;
  text-align: left;
  width: 100%;
  padding: 0 0.5rem;
}

.sidebar-contact i {
  margin-right: 0.5em;
  color: var(--text-muted);
  width: 1.1em;
  text-align: center;
  transition: color 0.2s ease;
}

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

.sidebar-contact a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

.sidebar-contact a:hover {
  color: var(--text-secondary);
}

.huggingface-emoji {
  display: inline-block;
  width: 1.2em;
  text-align: center;
  margin-right: 0.4em;
  font-size: 1.18em;
  vertical-align: middle;
}

/* ===== Main Content ===== */
main {
  flex: 1 1 0;
  min-width: 0;
}

main section {
  margin-bottom: 2.5rem;
  padding: 1.8rem;
  background: var(--bg-secondary);
  border-radius: 13px;
  box-shadow: 0 2px 10px var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

main section:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px var(--shadow-hover);
}

h2 {
  color: var(--text-secondary);
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  margin-top: 0;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0.5rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

h2 i {
  margin-right: 0.5em;
}

/* ===== Skills Grid ===== */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1rem;
}

.skill-tag {
  background: var(--nav-hover);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  border: 2px solid transparent;
}

.skill-tag:hover {
  background: var(--text-secondary);
  color: var(--bg-primary);
  transform: scale(1.05);
}

.skill-tag i {
  margin-right: 0.4em;
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding-left: 2rem;
  margin-top: 1.5rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline-marker {
  position: absolute;
  left: -2.35rem;
  top: 0;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-secondary);
  box-shadow: 0 0 0 3px var(--border);
}

.timeline-content h3 {
  color: var(--text-primary);
  margin: 0 0 0.3rem 0;
  font-size: 1.15rem;
}

.timeline-date {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
}

.timeline-content ul {
  margin: 0;
  padding-left: 1.2rem;
}

.timeline-content li {
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

/* ===== Contact Form ===== */
.contact-form-wrapper {
  margin-top: 1rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.form-group label i {
  margin-right: 0.4em;
  color: var(--accent);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45, 114, 217, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.submit-btn {
  background: var(--gradient-1);
  color: #fff;
  border: none;
  padding: 0.9rem 2rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

#form-status {
  margin-top: 1rem;
  padding: 0.8rem;
  border-radius: 8px;
  display: none;
}

#form-status.success {
  display: block;
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid var(--success);
}

#form-status.error {
  display: block;
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border: 1px solid var(--warning);
}

/* ===== Footer ===== */
footer {
  background: var(--text-primary);
  color: #cfd2e2;
  text-align: center;
  padding: 2rem 0 2.5rem 0;
  font-size: 0.95rem;
  margin-top: 3rem;
}

.view-counter {
  margin-bottom: 0.8rem;
  font-size: 1.05rem;
}

.view-counter i {
  color: var(--accent);
  margin-right: 0.4em;
}

.social-footer {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.social-footer a {
  color: #cfd2e2;
  font-size: 1.5rem;
  transition: all 0.2s ease;
}

.social-footer a:hover {
  color: var(--accent);
  transform: scale(1.2);
}

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 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; }
.fade-in:nth-child(4) { animation-delay: 0.4s; }

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

/* Typing Animation - Multi-line */
.typing-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 1rem;
  line-height: 1.4;
  min-height: 2.8em;
  display: block;
}

.typing-line {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  width: 0;
  animation: typing 3s steps(40) forwards;
  /* Removed: border-right and blink animation */
}

.typing-line:nth-child(1) {
  animation-delay: 0.3s;
}

.typing-line:nth-child(2) {
  animation-delay: 1.5s;
  font-size: 0.9em;
  color: var(--text-muted);
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

/* Removed: @keyframes blink */

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .container.main-flex {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    position: static;
  }
}

@media (max-width: 700px) {
  .mobile-menu-toggle {
    display: block;
  }
  
  nav {
    display: none;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.5rem;
  }
  
  nav.active {
    display: flex;
  }
  
  nav a {
    padding: 0.5rem 1rem;
    width: 100%;
    text-align: center;
  }
  
  .theme-toggle {
    margin-top: 0.5rem;
  }
  
  main section {
    padding: 1.2rem;
  }
  
  .skills-grid {
    justify-content: center;
  }
}

@media (max-width: 400px) {
  .sidebar-name {
    font-size: 1.2rem;
  }
  
  .sidebar-title {
    font-size: 0.9rem;
  }
  
  .quick-stats {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* ===== Mobile Breadcrumb Navigation ===== */
.mobile-breadcrumb {
 display: none;
 background: var(--bg-secondary);
 border-bottom: 1px solid var(--border);
 padding: 0.8rem 1rem;
 font-size: 0.9rem;
}

.mobile-breadcrumb a {
 color: var(--accent);
 text-decoration: none;
 font-weight: 600;
}

.mobile-breadcrumb a:hover {
 text-decoration: underline;
}

.mobile-breadcrumb .separator {
 color: var(--text-muted);
 margin: 0 0.5rem;
}

.mobile-breadcrumb .current {
 color: var(--text-muted);
 font-weight: 500;
}

/* Mobile Quick Links (for papers filter, etc.) */
.mobile-quick-nav {
 display: none;
 background: var(--bg-primary);
 padding: 0.8rem 1rem;
 border-bottom: 1px solid var(--border);
 overflow-x: auto;
 white-space: nowrap;
}

.mobile-quick-nav button,
.mobile-quick-nav a {
 display: inline-block;
 padding: 0.5rem 1rem;
 margin-right: 0.5rem;
 background: var(--bg-secondary);
 border: 2px solid var(--text-secondary);
 border-radius: 20px;
 color: var(--text-secondary);
 font-weight: 600;
 font-size: 0.85rem;
 text-decoration: none;
 cursor: pointer;
 transition: all 0.2s ease;
}

.mobile-quick-nav button:hover,
.mobile-quick-nav a:hover,
.mobile-quick-nav button.active {
 background: var(--text-secondary);
 color: var(--bg-primary);
}

/* Show on mobile */
@media (max-width: 700px) {
 .mobile-breadcrumb {
 display: block;
 }
 
 .mobile-quick-nav {
 display: block;
 }
 
 /* Hide desktop filter controls on mobile, use quick nav instead */
 .filter-controls {
 display: none;
 }
}



/* ===== ADD THESE STYLES FOR OTHER PAGES ===== */

/* ===== Main Container (for pages without sidebar) ===== */
.main-container {
  max-width: 900px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
}

.main-container > section {
  background: var(--bg-secondary);
  border-radius: 13px;
  box-shadow: 0 2px 10px var(--shadow);
  padding: 2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: 1px solid var(--border);
}

.main-container > section:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px var(--shadow-hover);
}

/* ===== Degree Cards ===== */
.degree-card {
  background: var(--bg-primary);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-left: 4px solid var(--accent);
  transition: all 0.2s ease;
}

.degree-card:hover {
  transform: translateX(5px);
  box-shadow: 0 4px 15px var(--shadow-hover);
  border-left-color: var(--text-secondary);
}

.degree-header h3 {
  color: var(--text-primary);
  margin: 0 0 0.5rem 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.edu-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  align-items: center;
}

.edu-date {
  color: var(--text-secondary);
  font-weight: 600;
  background: var(--nav-hover);
  padding: 0.3rem 0.7rem;
  border-radius: 15px;
  font-size: 0.85rem;
}

.edu-meta i, .edu-date i {
  margin-right: 0.4em;
  color: var(--accent);
}

.edu-bullets {
  padding-left: 1.2rem;
  margin: 0;
}

.edu-bullets li {
  margin-bottom: 0.5rem;
  line-height: 1.5;
  color: var(--text-primary);
}

/* ===== Papers List ===== */
.filter-controls {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  justify-content: flex-start;
  padding: 0.8rem;
  background: var(--bg-primary);
  border-radius: 10px;
}

.filter-btn {
  padding: 0.5rem 1rem;
  border: 2px solid var(--text-secondary);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

.filter-btn:hover, .filter-btn.active {
  background: var(--text-secondary);
  color: var(--bg-primary);
  transform: translateY(-2px);
}

.papers-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.paper-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.2rem;
  margin-bottom: 0.8rem;
  background: var(--bg-primary);
  border-radius: 10px;
  transition: all 0.2s ease;
  border: 1px solid var(--border);
}

.paper-item:hover {
  transform: translateX(5px);
  box-shadow: 0 2px 10px var(--shadow-hover);
  border-color: var(--accent);
}

.paper-year {
  font-weight: 700;
  color: var(--text-secondary);
  min-width: 60px;
  text-align: center;
  font-size: 0.9rem;
  background: var(--nav-hover);
  padding: 0.4rem 0.7rem;
  border-radius: 15px;
}

.paper-year.badge-best {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: #fff;
}

.badge {
  background: var(--warning);
  color: #fff;
  padding: 0.2rem 0.5rem;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 700;
  margin-left: 0.4rem;
  text-transform: uppercase;
}

.paper-title {
  flex: 1;
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.5;
}

.paper-venue {
  color: var(--text-muted);
  font-size: 0.85rem;
  white-space: nowrap;
  font-weight: 500;
}

.paper-link {
  color: var(--accent);
  font-weight: 600;
  white-space: nowrap;
  padding: 0.4rem 0.8rem;
  border-radius: 15px;
  background: var(--nav-hover);
  transition: all 0.2s ease;
  font-size: 0.85rem;
}

.paper-link:hover {
  background: var(--text-secondary);
  color: var(--bg-primary);
}

/* ===== Activity Grid ===== */
.activity-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.activity-card {
  background: var(--bg-primary);
  border-radius: 12px;
  padding: 1.8rem 1.5rem;
  text-align: center;
  transition: all 0.2s ease;
  border: 2px solid var(--border);
}

.activity-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 20px var(--shadow-hover);
  border-color: var(--accent);
}

.activity-icon {
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.activity-card h3 {
  color: var(--text-primary);
  margin: 0 0 0.8rem 0;
  font-size: 1.15rem;
  font-weight: 700;
}

.activity-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.activity-list {
  text-align: left;
  padding-left: 1.2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0;
}

.activity-list li {
  margin-bottom: 0.4rem;
  line-height: 1.4;
}

.activity-link {
  display: inline-block;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 15px;
  margin: 0.3rem 0.4rem 0.3rem 0;
  transition: all 0.2s ease;
  font-size: 0.85rem;
  background: var(--nav-hover);
}

.activity-link:hover {
  background: var(--text-secondary);
  color: var(--bg-primary);
}

.demo-links {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ===== Responsive for New Elements ===== */
@media (max-width: 700px) {
  .main-container {
    padding: 0 1rem;
    margin: 1.5rem auto;
  }
  
  .main-container > section {
    padding: 1.2rem;
  }
  
  .paper-item {
    flex-direction: column;
    gap: 0.7rem;
  }
  
  .paper-venue {
    white-space: normal;
  }
  
  .activity-grid {
    grid-template-columns: 1fr;
  }
  
  .filter-controls {
    justify-content: center;
  }
  
  .edu-meta {
    flex-direction: column;
    gap: 0.4rem;
    align-items: flex-start;
  }
}

/* ===== NEW FEATURES STYLES ===== */

/* Scroll Progress Bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: var(--gradient-1);
  z-index: 1001;
  transition: width 0.1s ease;
}

/* Search Container */
.search-container {
  position: fixed;
  top: -80px;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  padding: 1rem 2rem;
  box-shadow: 0 4px 20px var(--shadow-hover);
  z-index: 1000;
  transition: top 0.3s ease;
}

.search-container.active {
  top: 70px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

#search-input {
  flex: 1;
  padding: 0.8rem 1.2rem;
  border: 2px solid var(--border);
  border-radius: 25px;
  font-size: 1rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all 0.2s ease;
}

#search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.search-close {
  background: var(--gradient-1);
  border: none;
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.2s ease;
}

.search-close:hover {
  transform: rotate(90deg);
}

.search-results {
  max-width: 600px;
  margin: 1rem auto 0;
  background: var(--bg-primary);
  border-radius: 10px;
  padding: 1rem;
  max-height: 400px;
  overflow-y: auto;
  display: none;
}

.search-results.active {
  display: block;
}

.search-result-item {
  padding: 0.8rem;
  margin-bottom: 0.5rem;
  border-radius: 8px;
  background: var(--bg-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.search-result-item:hover {
  background: var(--nav-hover);
  transform: translateX(5px);
}

.search-result-item h4 {
  color: var(--text-primary);
  margin: 0 0 0.3rem 0;
  font-size: 0.95rem;
}

.search-result-item p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0;
}

.search-toggle {
  background: none;
  border: 2px solid var(--text-secondary);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-toggle:hover {
  background: var(--nav-hover);
  transform: scale(1.1);
}

/* Email Copy Button */
.email-copy-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 0.8rem 0;
  padding: 0.6rem 1rem;
  background: var(--bg-primary);
  border-radius: 10px;
  position: relative;
}

.email-address {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 500;
}

.copy-email-btn {
  background: var(--gradient-1);
  border: none;
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.copy-email-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 2px 10px rgba(102, 126, 234, 0.4);
}

.copy-toast {
  position: absolute;
  top: -35px;
  left: 50%;
  transform: translateX(-50%) scale(0);
  background: var(--success);
  color: #fff;
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  transition: transform 0.3s ease;
}

.copy-toast.show {
  transform: translateX(-50%) scale(1);
}

/* CV Download Button */
.cv-download-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--gradient-2);
  color: #fff;
  padding: 0.8rem 1.5rem;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  margin: 0.8rem 0;
  transition: all 0.3s ease;
  position: relative;
}

.cv-download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(240, 147, 251, 0.4);
}

.download-count {
  background: rgba(255,255,255,0.3);
  padding: 0.2rem 0.5rem;
  border-radius: 12px;
  font-size: 0.75rem;
  margin-left: 0.3rem;
}

/* HuggingFace Stats */
.hf-stats {
  display: flex;
  justify-content: space-around;
  padding: 0.8rem;
  margin: 0.8rem 0;
  background: var(--bg-primary);
  border-radius: 10px;
  font-size: 0.85rem;
  border: 1px solid var(--border);
}

.hf-stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.hf-stat-item i {
  color: var(--accent);
  font-size: 1.1rem;
}

.hf-stat-item span#hf-downloads,
.hf-stat-item span#hf-models {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1rem;
}

.hf-stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}


/* Research Interests Cloud */
.interests-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  padding: 1rem 0;
}

.interest-tag {
  padding: 0.5rem 1rem;
  background: var(--nav-hover);
  color: var(--text-secondary);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  animation: float 3s ease-in-out infinite;
}

.interest-tag:hover {
  background: var(--gradient-1);
  color: #fff;
  transform: translateY(-3px) scale(1.05);
}

.interest-tag:nth-child(odd) {
  animation-delay: 0.5s;
}

.interest-tag:nth-child(even) {
  animation-delay: 1s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

/* News Timeline */
.news-timeline {
  margin-top: 1rem;
}

.news-item {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  margin-bottom: 1rem;
  background: var(--bg-primary);
  border-radius: 10px;
  border-left: 4px solid var(--accent);
  transition: all 0.2s ease;
}

.news-item:hover {
  transform: translateX(5px);
  box-shadow: 0 2px 10px var(--shadow-hover);
}

.news-date {
  min-width: 100px;
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 0.85rem;
  padding-top: 0.2rem;
}

.news-content h4 {
  color: var(--text-primary);
  margin: 0 0 0.4rem 0;
  font-size: 1rem;
  font-weight: 600;
}

.news-content h4 i {
  margin-right: 0.4em;
  color: var(--accent);
}

.news-content p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.5;
}

/* Academic Journey Map */
.journey-map {
  margin-top: 1.5rem;
}

.map-container {
  position: relative;
  padding: 2rem 1rem;
}

.journey-item {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: var(--bg-primary);
  border-radius: 12px;
  transition: all 0.3s ease;
  position: relative;
}

.journey-item:hover {
  transform: translateX(8px);
  box-shadow: 0 4px 20px var(--shadow-hover);
}

.journey-item::before {
  content: '';
  position: absolute;
  left: -10px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--gradient-1);
  border: 3px solid var(--bg-secondary);
}

.journey-location {
  min-width: 150px;
  text-align: right;
  padding-right: 1rem;
  border-right: 3px solid var(--accent);
}

.location-icon {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.location-name {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1rem;
}

.location-country {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.journey-details {
  flex: 1;
}

.journey-role {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.journey-period {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  display: inline-block;
  background: var(--nav-hover);
  padding: 0.3rem 0.7rem;
  border-radius: 15px;
}

.journey-description {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 0;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--gradient-1);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 25px rgba(102, 126, 234, 0.6);
}

/* Responsive for New Features */
@media (max-width: 700px) {
  .search-container {
    padding: 0.8rem 1rem;
  }
  
  .search-container.active {
    top: 60px;
  }
  
  .journey-item {
    flex-direction: column;
    gap: 1rem;
  }
  
  .journey-item::before {
    left: 50%;
    top: -10px;
    transform: translateX(-50%);
  }
  
  .journey-location {
    text-align: center;
    border-right: none;
    border-bottom: 3px solid var(--accent);
    padding-right: 0;
    padding-bottom: 1rem;
  }
  
  .news-item {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .news-date {
    min-width: auto;
    text-align: left;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
  
  .interests-cloud {
    justify-content: flex-start;
  }
}

/* ===== Research Topic Network ===== */
#research-network {
 width: 100%;
 height: 500px;
 background: var(--bg-primary);
 border-radius: 12px;
 border: 2px solid var(--border);
 margin-top: 1.5rem;
}

.network-legend {
 display: flex;
 justify-content: center;
 gap: 1.5rem;
 flex-wrap: wrap;
 margin-top: 1rem;
 padding: 1rem;
 background: var(--bg-primary);
 border-radius: 10px;
}

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

.legend-dot {
 width: 12px;
 height: 12px;
 border-radius: 50%;
 display: inline-block;
}