/* ===== CSS Variables ===== */
:root {
  --bg-primary: #f4f5fb;
  --bg-secondary: #ffffff;
  --bg-elevated: #ffffff;
  --text-primary: #1a1d3a;
  --text-secondary: #3a3f8c;
  --text-muted: #8b8fb8;
  --accent: #5b6ef5;
  --accent-hover: #4456e8;
  --accent-soft: rgba(91, 110, 245, 0.12);
  --accent-violet: #7c5cff;
  --border: #e6e8f5;
  --border-strong: #d4d7ee;
  --shadow-sm: 0 1px 2px rgba(30,32,80,0.04), 0 1px 3px rgba(30,32,80,0.06);
  --shadow: 0 2px 8px rgba(30,32,80,0.06), 0 4px 16px rgba(30,32,80,0.04);
  --shadow-hover: 0 8px 24px rgba(91,110,245,0.12), 0 16px 48px rgba(30,32,80,0.08);
  --shadow-glow: 0 0 0 1px var(--accent-soft), 0 8px 32px rgba(91,110,245,0.18);
  --nav-hover: #eef0fb;
  --success: #10b981;
  --warning: #f59e0b;
  --gradient-1: linear-gradient(135deg, #5b6ef5 0%, #7c5cff 100%);
  --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-hero: linear-gradient(135deg, #4456e8 0%, #7c5cff 50%, #9333ea 100%);
  --gradient-mesh: radial-gradient(at 20% 20%, rgba(91,110,245,0.10) 0px, transparent 50%),
                   radial-gradient(at 80% 0%, rgba(124,92,255,0.08) 0px, transparent 50%),
                   radial-gradient(at 70% 80%, rgba(147,51,234,0.06) 0px, transparent 50%),
                   radial-gradient(at 10% 90%, rgba(91,110,245,0.07) 0px, transparent 50%);
  --radius: 14px;
  --radius-lg: 18px;
  --font-display: 'Sora', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', Roboto, Arial, sans-serif;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 0.25s;
  --dur-slow: 0.4s;
}

.dark-mode {
  --bg-primary: #0c0e1f;
  --bg-secondary: #161830;
  --bg-elevated: #1c1f3d;
  --text-primary: #e8eaf6;
  --text-secondary: #9aa6e8;
  --text-muted: #6b7099;
  --accent: #7b8eff;
  --accent-hover: #9aa8ff;
  --accent-soft: rgba(123,142,255,0.16);
  --accent-violet: #a78bff;
  --border: #2a2d4d;
  --border-strong: #3a3e66;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 2px 8px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.5), 0 16px 48px rgba(123,142,255,0.10);
  --shadow-glow: 0 0 0 1px rgba(123,142,255,0.2), 0 8px 32px rgba(123,142,255,0.18);
  --nav-hover: #1f2244;
  --gradient-mesh: radial-gradient(at 20% 20%, rgba(91,110,245,0.16) 0px, transparent 50%),
                   radial-gradient(at 80% 0%, rgba(124,92,255,0.12) 0px, transparent 50%),
                   radial-gradient(at 70% 80%, rgba(147,51,234,0.10) 0px, transparent 50%),
                   radial-gradient(at 10% 90%, rgba(91,110,245,0.12) 0px, transparent 50%);
}

/* ===== Dark Mode Safety-Net Overrides (outside media query) ===== */
/* These ensure dark mode colors are correct regardless of media query evaluation */
.dark-mode nav#main-nav {
  background: rgba(22, 24, 48, 0.9);
}

.dark-mode .appmenu { background: #161830; }
.dark-mode .appmenu-link { color: #e8eaf6; }
.dark-mode .appmenu-link i { color: #7b8eff; }
.dark-mode .appmenu-link.active { color: #7b8eff; background: rgba(123,142,255,0.16); border-color: #7b8eff; }
.dark-mode .appmenu-divider { background: #2a2d4d; }
.dark-mode .appmenu-section { color: #6b7099; }
.dark-mode .appmenu-header { background: var(--gradient-hero); }
.dark-mode .appmenu-header h2 { color: #fff; }
.dark-mode .appmenu-close { background: rgba(255,255,255,0.2); color: #fff; }

.dark-mode .search-container { background: #161830; }
.dark-mode #search-input { background: #0c0e1f; color: #e8eaf6; border-color: #2a2d4d; }
.dark-mode #search-input::placeholder { color: #6b7099; }
.dark-mode .search-results { background: #0c0e1f; }
.dark-mode .search-result-item { background: #161830; }
.dark-mode .search-result-item h4 { color: #e8eaf6; }
.dark-mode .search-result-item p { color: #6b7099; }
.dark-mode .search-result-item:hover { background: #1f2244; }
.dark-mode .search-toggle { color: #9aa6e8; border-color: #9aa6e8; }

.dark-mode .chat-panel { background: #161830; border-color: #2a2d4d; }
.dark-mode .chat-msg.bot { background: #0c0e1f; color: #e8eaf6; border-color: #2a2d4d; }
.dark-mode .chat-typing { background: #0c0e1f; border-color: #2a2d4d; }
.dark-mode .chat-typing span { background: #6b7099; }
.dark-mode .chat-input { background: #0c0e1f; color: #e8eaf6; border-color: #3a3e66; }
.dark-mode .chat-quick { background: rgba(123,142,255,0.16); color: #7b8eff; border-color: #7b8eff; }

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

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg-primary);
  background-image: var(--gradient-mesh);
  background-size: 100% 100%;
  background-attachment: fixed;
  color: var(--text-primary);
  font-size: 1.05rem;
  line-height: 1.65;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Smooth color-shifting overlay (hue-rotate on the mesh gradient) */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: var(--gradient-mesh);
  background-size: 200% 200%;
  z-index: -2;
  pointer-events: none;
  animation: mesh-hue 60s ease-in-out infinite, mesh-drift 30s ease-in-out infinite;
}

@keyframes mesh-hue {
  0%, 100% { filter: hue-rotate(0deg); }
  50% { filter: hue-rotate(40deg); }
}

.dark-mode::before {
  animation: mesh-hue-dark 80s ease-in-out infinite, mesh-drift 40s ease-in-out infinite;
}

@keyframes mesh-hue-dark {
  0%, 100% { filter: hue-rotate(0deg); }
  50% { filter: hue-rotate(20deg); }
}

@keyframes mesh-drift {
  0%, 100% { background-position: 0% 0%, 0% 0%, 0% 0%, 0% 0%; }
  50% { background-position: 15% 18%, -12% 10%, 8% -15%, -18% -8%; }
}

@media (prefers-reduced-motion: reduce) {
  body::before { animation: none; }
  h2 { animation: none; }
}

/* Anchor scroll offset so in-page links clear the sticky nav */
html {
  scroll-padding-top: 90px;
}
[id] {
  scroll-margin-top: 90px;
}

/* ===== 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 var(--dur) var(--ease);
}

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

/* ===== Skeleton Loaders ===== */
.skeleton {
  display: inline-block;
  background: linear-gradient(90deg, var(--border) 25%, var(--nav-hover) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s ease-in-out infinite;
  border-radius: 6px;
  color: transparent;
  min-width: 2.5em;
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .skeleton { animation: none; }
}

/* ===== Navigation ===== */
nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.2rem;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0.95rem 0 0.85rem 0;
  font-size: 1.05rem;
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: .01em;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px var(--shadow-sm);
}

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 var(--dur) var(--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 var(--dur) var(--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: var(--radius-lg);
  box-shadow: 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;
}

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

/* Citation Growth Sparkline */
.citation-spark {
  width: 100%;
  padding: 0.4rem 0.5rem 0.5rem;
  margin-bottom: 0.5rem;
}

.citation-spark svg {
  width: 100%;
  height: 32px;
  display: block;
}

.citation-spark .spark-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.citation-spark .spark-area {
  fill: url(#spark-grad);
  opacity: 0.25;
}

.citation-spark .spark-label {
  display: block;
  font-size: 0.68rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.2rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Profile Pic */
.profile-pic-tiny {
  width: 110px;
  height: 110px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid transparent;
  background: linear-gradient(var(--bg-secondary), var(--bg-secondary)) padding-box,
              var(--gradient-1) border-box;
  box-shadow: 0 4px 16px rgba(91,110,245,0.18);
  margin-bottom: 0.75rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.profile-pic-tiny:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 24px rgba(91,110,245,0.28);
}

/* Sidebar Name & Title */
.sidebar-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  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: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: transform 0.3s cubic-bezier(0.4,0,0.2,1), box-shadow 0.3s ease, border-color 0.3s ease;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

main section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-1);
  opacity: 0;
  transition: opacity 0.3s ease;
}

main section:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

main section:hover::before {
  opacity: 1;
}

h2 {
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 1.65rem;
  margin-bottom: 0.75rem;
  margin-top: 0;
  padding-bottom: 0.6rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  position: relative;
  background: linear-gradient(90deg, var(--text-primary), var(--accent), var(--accent-violet), var(--text-primary));
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: heading-gradient 6s ease-in-out infinite;
}

@keyframes heading-gradient {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 200% 50%; }
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 3px;
  border-radius: 3px;
  background: var(--gradient-1);
}

h2 i {
  margin-right: 0.5em;
  -webkit-text-fill-color: var(--accent);
  color: var(--accent);
  color: var(--accent);
}

/* ===== 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 var(--dur) var(--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 var(--dur-slow) var(--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 var(--dur) var(--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 var(--dur) var(--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: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 2rem;
  transition: transform 0.3s cubic-bezier(0.4,0,0.2,1), box-shadow 0.3s ease;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.main-container > section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-1);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.main-container > section:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.main-container > section:hover::before {
  opacity: 1;
}

/* ===== Degree Cards ===== */
.degree-card {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 1.6rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  transition: all var(--dur-slow) var(--ease);
  box-shadow: var(--shadow-sm);
}

.degree-card:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
  border-left-color: var(--accent-violet);
}

.degree-header h3 {
  font-family: var(--font-display);
  color: var(--text-primary);
  margin: 0 0 0.5rem 0;
  font-size: 1.3rem;
  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: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.filter-btn {
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--border-strong);
  background: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: 20px;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  transition: all var(--dur) var(--ease);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--gradient-1);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(91,110,245,0.25);
}

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

.paper-item {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 1.4rem 1.5rem;
  margin-bottom: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  transition: all var(--dur-slow) var(--ease);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.paper-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.paper-year {
  font-family: var(--font-display);
  font-weight: 700;
  color: #fff;
  min-width: 64px;
  text-align: center;
  font-size: 1rem;
  background: var(--gradient-1);
  padding: 0.5rem 0.6rem;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(91,110,245,0.25);
}

.paper-year.badge-best {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  box-shadow: 0 2px 8px rgba(245,87,108,0.3);
}

.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;
  font-size: 1.02rem;
  line-height: 1.5;
}

.paper-venue {
  color: var(--accent);
  font-size: 0.8rem;
  white-space: nowrap;
  font-weight: 600;
  background: var(--accent-soft);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
}

.paper-link {
  color: var(--accent);
  font-weight: 600;
  white-space: nowrap;
  padding: 0.5rem 1rem;
  border-radius: 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border-strong);
  transition: all var(--dur) var(--ease);
  font-size: 0.85rem;
  text-decoration: none;
}

.paper-link:hover {
  background: var(--gradient-1);
  color: #fff;
  border-color: transparent;
  transform: translateY(-1px);
}

/* ===== 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: var(--radius);
  padding: 1.8rem 1.5rem;
  text-align: center;
  transition: all var(--dur-slow) var(--ease);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.activity-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-1);
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.activity-card:hover::before {
  opacity: 1;
}

.activity-icon {
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: 1rem;
  background: var(--accent-soft);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  margin-right: auto;
}

.activity-card h3 {
  font-family: var(--font-display);
  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 var(--dur) var(--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 var(--dur) var(--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 var(--dur) var(--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 var(--dur) var(--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 var(--dur) var(--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 var(--dur) var(--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 var(--dur-slow) var(--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 var(--dur-slow) var(--ease);
  animation: float 3s ease-in-out infinite, tag-hue 8s ease-in-out infinite;
}

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

.interest-tag:nth-child(odd) {
  animation-delay: 0.5s, 1s;
}

.interest-tag:nth-child(even) {
  animation-delay: 1s, 2s;
}

.interest-tag:nth-child(3n) {
  animation-delay: 1.5s, 3s;
}

.interest-tag:nth-child(4n) {
  animation-delay: 2s, 4s;
}

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

@keyframes tag-hue {
  0%, 100% { filter: hue-rotate(0deg); }
  50% { filter: hue-rotate(15deg); }
}

/* 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 var(--dur) var(--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-left: 0;
}

.journey-item {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-left: 3rem;
}

.journey-item::before {
  content: '';
  position: absolute;
  left: 23px;
  top: 48px;
  bottom: -1.5rem;
  width: 3px;
  background: linear-gradient(var(--accent), var(--accent-soft));
  border-radius: 3px;
}

.journey-item:last-child::before {
  display: none;
}

.journey-pin {
  position: absolute;
  left: 0;
  top: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-1);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 4px 14px rgba(91,110,245,0.3);
  z-index: 1;
  flex-shrink: 0;
}

.journey-card {
  flex: 1;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--dur-slow) var(--ease);
}

.journey-card:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.journey-location {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 0.4rem;
}

.location-name {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1.05rem;
}

.location-country {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
}

.journey-role {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.journey-period {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  display: inline-block;
  background: var(--accent-soft);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  margin-bottom: 0.6rem;
}

.journey-description {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 90px;
  right: 24px;
  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 var(--dur-slow) var(--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);
}

/* Hide back-to-top when chat panel is open */
body:has(.chat-panel.active) .back-to-top {
  opacity: 0 !important;
  visibility: hidden !important;
}
.chat-panel.active ~ .back-to-top {
  opacity: 0 !important;
  visibility: hidden !important;
}

/* Responsive for New Features */
@media (max-width: 700px) {
  .search-container {
    padding: 0.8rem 1rem;
  }
  
  .search-container.active {
    top: 60px;
  }
  
  .journey-item {
    padding-left: 2.5rem;
    gap: 1rem;
  }
  
  .journey-item::before {
    left: 19px;
    top: 44px;
  }
  
  .journey-pin {
    width: 40px;
    height: 40px;
    font-size: 0.95rem;
  }
  
  .journey-card {
    padding: 1.1rem 1.2rem;
  }
  
  .news-item {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .news-date {
    min-width: auto;
    text-align: left;
  }
  
  .back-to-top {
    bottom: 80px;
    right: 16px;
    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;
}

.legend-dot.collab {
  background: #ec4899;
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  background: var(--gradient-hero);
  color: #fff;
  padding: 4.5rem 1.5rem 4rem;
  text-align: center;
  overflow: hidden;
  margin-bottom: 2.5rem;
}

.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.5;
  pointer-events: none;
}

.hero::before {
  width: 320px;
  height: 320px;
  background: rgba(255,255,255,0.18);
  top: -120px;
  left: -80px;
  animation: hero-float 12s ease-in-out infinite;
}

.hero::after {
  width: 280px;
  height: 280px;
  background: rgba(240,147,251,0.25);
  bottom: -120px;
  right: -60px;
  animation: hero-float 14s ease-in-out infinite reverse;
}

@keyframes hero-float {
  0%, 100% { transform: translate(0,0); }
  50% { transform: translate(20px, -15px); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(255,255,255,0.15);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  margin-bottom: 1.2rem;
  backdrop-filter: blur(6px);
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 0.6rem 0;
  background: linear-gradient(90deg, #ffffff, #d6dcff, #f0c4ff, #ffffff, #d6dcff);
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: hero-name-shift 8s ease-in-out infinite;
}

@keyframes hero-name-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-roles {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  font-weight: 600;
  min-height: 1.8em;
  margin-bottom: 1.8rem;
  opacity: 0.95;
}

.hero-roles .ty-text::after {
  content: '|';
  margin-left: 2px;
  animation: caret 1s step-end infinite;
  font-weight: 300;
  opacity: 0.8;
}

.hero-roles .ty-text {
  background: linear-gradient(90deg, #fff, #d6dcff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

@keyframes caret {
  50% { opacity: 0; }
}

.hero-cta {
  display: flex;
  gap: 0.9rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-cta a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.25s ease;
  border: 1px solid rgba(255,255,255,0.35);
}

.hero-cta a.primary {
  background: #fff;
  color: var(--accent-hover);
}

.hero-cta a.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.hero-cta a.ghost {
  background: rgba(255,255,255,0.1);
  color: #fff;
  backdrop-filter: blur(6px);
}

.hero-cta a.ghost:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

/* ===== Currently Strip ===== */
.currently-strip {
  max-width: 1100px;
  margin: -1.5rem auto 2.5rem;
  padding: 0 1.5rem;
  position: relative;
  z-index: 2;
}

.currently-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.4rem;
  box-shadow: var(--shadow);
}

.currently-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--success);
  position: relative;
  flex-shrink: 0;
}

.pulse-dot::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s ease-out infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 0.7; }
  100% { transform: scale(2.6); opacity: 0; }
}

.currently-items {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.currently-items span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.currently-items i {
  color: var(--accent);
}

/* ===== Projects Showcase ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.4rem;
  margin-top: 1.5rem;
}

/* Spotlight hover glow (cards) */
.spotlight {
  position: relative;
  --mx: 50%;
  --my: 50%;
}

.spotlight::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(220px circle at var(--mx) var(--my), rgba(91,110,245,0.14), transparent 60%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
  z-index: 0;
}

.spotlight > * { position: relative; z-index: 1; }

.spotlight:hover::after {
  opacity: 1;
}

/* Experience filter chips (reuse .filter-controls) */
.exp-filters {
  margin-top: 1.2rem;
  margin-bottom: 1.2rem;
}

/* Scroll-spy active nav link */
nav a.spy-active {
  color: var(--text-primary);
}
nav a.spy-active::after {
  width: 100%;
}

.project-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all var(--dur-slow) var(--ease);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-1);
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.project-card:hover::before {
  opacity: 1;
}

.project-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

.project-card h3 {
  font-family: var(--font-display);
  color: var(--text-primary);
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
  font-weight: 700;
}

.project-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.55;
  margin: 0 0 1rem 0;
  flex: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.project-tag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--nav-hover);
  padding: 0.25rem 0.6rem;
  border-radius: 12px;
}

.project-links {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  padding: 0.45rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  transition: all var(--dur) var(--ease);
}

.project-link:hover {
  background: var(--gradient-1);
  color: #fff;
  border-color: transparent;
}

.project-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--warning);
  background: rgba(245,158,11,0.12);
  padding: 0.2rem 0.5rem;
  border-radius: 10px;
}

/* ===== Command Palette ===== */
.cmd-palette {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  background: rgba(10,12,30,0.45);
  backdrop-filter: blur(4px);
}

.cmd-palette.active {
  display: flex;
  animation: cmd-fade 0.15s ease;
}

@keyframes cmd-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.cmd-box {
  width: min(560px, 92vw);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 64px rgba(10,12,30,0.3);
  overflow: hidden;
  animation: cmd-pop 0.18s cubic-bezier(0.4,0,0.2,1);
}

@keyframes cmd-pop {
  from { transform: translateY(-12px) scale(0.98); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

.cmd-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border);
}

.cmd-input-wrap i {
  color: var(--text-muted);
}

.cmd-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
}

.cmd-kbd {
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.15rem 0.4rem;
}

.cmd-results {
  max-height: 360px;
  overflow-y: auto;
  padding: 0.4rem;
}

.cmd-group {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0.6rem 0.8rem 0.3rem;
}

.cmd-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.7rem 0.8rem;
  border-radius: 10px;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 0.92rem;
  transition: background 0.12s ease;
}

.cmd-item i {
  color: var(--accent);
  width: 1.2em;
  text-align: center;
}

.cmd-item .cmd-hint {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.cmd-item.selected,
.cmd-item:hover {
  background: var(--accent-soft);
}

.cmd-footer {
  display: flex;
  justify-content: space-between;
  padding: 0.6rem 1.2rem;
  border-top: 1px solid var(--border);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.cmd-footer kbd {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  font-family: var(--font-body);
  font-size: 0.7rem;
}

@media (max-width: 700px) {
  .hero { padding: 3.2rem 1.2rem 2.8rem; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta a { justify-content: center; }
  .currently-strip { margin-top: -1.2rem; }
  .currently-card { padding: 0.8rem 1rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .page-header { padding: 2.6rem 1.2rem 2.2rem; }
  .page-header-stats { gap: 1rem; }
  .ph-stat { min-width: auto; }
  .edu-timeline { padding-left: 2.2rem; }
  .edu-pin { width: 38px; height: 38px; font-size: 0.9rem; left: -2.2rem; }
  .act-stats { flex-wrap: wrap; gap: 0.8rem; }
  .act-stat { flex: 1 1 40%; }
  .activity-row { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .activity-row .row-year { margin-bottom: 0.2rem; }
}

@media (prefers-reduced-motion: reduce) {
  .hero::before, .hero::after { animation: none; }
  .pulse-dot::after { animation: none; }
  .hero-roles .ty-text::after { animation: none; }
  .hero-name { animation: none; }
}

/* ===== Page Header (secondary pages) ===== */
.page-header {
  position: relative;
  background: var(--gradient-hero);
  color: #fff;
  padding: 3.4rem 1.5rem 3rem;
  text-align: center;
  overflow: hidden;
  margin-bottom: 2rem;
}

.page-header::before {
  content: '';
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255,255,255,0.14);
  filter: blur(60px);
  top: -120px;
  right: -60px;
  pointer-events: none;
}

.page-header-inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

.page-header .ph-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(255,255,255,0.15);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  margin-bottom: 1rem;
  backdrop-filter: blur(6px);
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 0.6rem 0;
}

.page-header .ph-subtitle {
  font-size: 1rem;
  opacity: 0.92;
  margin: 0 0 1.6rem 0;
  line-height: 1.55;
}

.page-header-stats {
  display: flex;
  justify-content: center;
  gap: 2.2rem;
  flex-wrap: wrap;
}

.ph-stat {
  text-align: center;
  min-width: 90px;
}

.ph-stat .ph-num {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  display: block;
  line-height: 1;
}

.ph-stat .ph-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.85;
  margin-top: 0.35rem;
  display: block;
}

/* ===== Education Timeline ===== */
.edu-timeline {
  position: relative;
  padding-left: 3rem;
  margin-top: 1.5rem;
}

.edu-timeline::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 28px;
  bottom: 28px;
  width: 3px;
  background: linear-gradient(var(--accent), var(--accent-violet), var(--accent-soft));
  border-radius: 3px;
}

.degree-card {
  position: relative;
  margin-bottom: 1.6rem;
}

.edu-pin {
  position: absolute;
  left: -3rem;
  top: 0.4rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-1);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  box-shadow: 0 4px 14px rgba(91,110,245,0.3);
  z-index: 1;
}

.edu-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}

.edu-tag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--accent-soft);
  padding: 0.25rem 0.65rem;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.edu-tag i {
  font-size: 0.7rem;
}

.edu-funding-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, rgba(245,158,11,0.14), rgba(240,147,251,0.12));
  color: var(--warning);
  border: 1px solid rgba(245,158,11,0.3);
  padding: 0.5rem 0.9rem;
  border-radius: 10px;
  font-size: 0.82rem;
  font-weight: 700;
  margin-top: 1rem;
}

.edu-thesis-callout {
  margin-top: 1rem;
  padding: 1rem 1.2rem;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
}

.edu-thesis-callout .thesis-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  display: block;
  margin-bottom: 0.3rem;
}

.edu-thesis-callout .thesis-title {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.98rem;
  line-height: 1.45;
}

/* ===== Activities Stats Strip ===== */
.act-stats {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  box-shadow: var(--shadow-sm);
}

.act-stat {
  flex: 1;
  text-align: center;
  padding: 0.4rem 0.6rem;
}

.act-stat + .act-stat {
  border-left: 1px solid var(--border);
}

.act-stat .act-num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
  line-height: 1;
}

.act-stat .act-label {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.4rem;
  display: block;
}

/* ===== Activity Year-Badged Rows ===== */
.activity-rows {
  list-style: none;
  padding: 0;
  margin: 0;
}

.activity-row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.85rem 0.9rem;
  margin-bottom: 0.5rem;
  border-radius: 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  transition: all var(--dur) var(--ease);
}

.activity-row:hover {
  transform: translateX(4px);
  border-color: var(--accent);
  background: var(--bg-secondary);
}

.row-year {
  flex-shrink: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  color: #fff;
  background: var(--gradient-1);
  padding: 0.3rem 0.55rem;
  border-radius: 8px;
  min-width: 52px;
  text-align: center;
  margin-top: 0.1rem;
}

.row-year.tier-best {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.row-body {
  flex: 1;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-primary);
}

.row-body .row-title {
  font-weight: 600;
  color: var(--text-primary);
}

.row-body .row-venue {
  display: block;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 0.15rem;
}

.row-icon {
  flex-shrink: 0;
  color: var(--accent);
  font-size: 0.95rem;
  margin-top: 0.2rem;
  width: 1.2em;
  text-align: center;
}

/* Open Source card enrichment */
.os-stats {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 0.8rem 0 1rem 0;
}

.os-stat {
  text-align: center;
}

.os-stat .os-num {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
  line-height: 1;
}

.os-stat .os-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.3rem;
  display: block;
}

/* Recognition card */
.recognition-card {
  background: linear-gradient(135deg, rgba(245,158,11,0.08), rgba(240,147,251,0.08));
  border-color: rgba(245,158,11,0.25);
}

.recognition-card .activity-icon {
  background: linear-gradient(135deg, rgba(245,158,11,0.18), rgba(240,147,251,0.18));
  color: var(--warning);
}

.recognition-item {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  margin-bottom: 0.7rem;
  font-size: 0.86rem;
  line-height: 1.5;
  text-align: left;
  color: var(--text-primary);
}

.recognition-item i {
  color: var(--warning);
  margin-top: 0.25rem;
  flex-shrink: 0;
}

.recognition-item:last-child {
  margin-bottom: 0;
}




/* ===== Blog Post ===== */
.blog-post {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  line-height: 1.7;
}

.blog-post .blog-meta {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}

.blog-post h1, .blog-post h2, .blog-post h3 {
  font-family: var(--font-display);
  color: var(--text-primary);
  margin-top: 1.6rem;
  background: none !important;
  -webkit-text-fill-color: var(--text-primary) !important;
  -webkit-background-clip: initial !important;
  background-clip: initial !important;
  animation: none !important;
}

.blog-post h1 { font-size: 1.5rem; }
.blog-post h2 { font-size: 1.25rem; }
.blog-post h3 { font-size: 1.1rem; }

.blog-post p { color: var(--text-primary); margin: 0.8rem 0; }

.blog-post ul, .blog-post ol {
  padding-left: 1.4rem;
  margin: 0.8rem 0;
}

.blog-post li { margin-bottom: 0.4rem; }

.blog-post a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-soft);
}

.blog-post a:hover { border-bottom-color: var(--accent); }

.blog-post strong { color: var(--text-primary); font-weight: 700; }

.blog-post code {
  background: var(--nav-hover);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

/* ===== Mobile App Bar + Full-Screen Overlay Menu ===== */
.appbar { display: none; }
.appmenu-toggle { position: fixed; top: 0; left: 0; opacity: 0; width: 0; height: 0; pointer-events: none; }
.appmenu { display: none; }

@media (max-width: 700px) {
  /* Hide old nav + hamburger on mobile */
  nav#main-nav { display: none !important; }
  .mobile-menu-toggle { display: none !important; }
  .mobile-breadcrumb { display: none !important; }
  .mobile-quick-nav { display: none !important; }

  /* Add top padding so content isn't hidden behind the fixed app bar */
  body { padding-top: 56px; }

  /* Fixed gradient top app bar */
  .appbar {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--gradient-hero);
    color: #fff;
    padding: 0.7rem 1rem;
    padding-top: calc(0.7rem + env(safe-area-inset-top, 0px));
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
  }

  .appbar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
  }

  .appbar-brand {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 800;
    color: #fff;
    text-decoration: none;
    letter-spacing: -0.01em;
    white-space: nowrap;
  }

  .appbar-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255,255,255,0.18);
    border: none;
    color: #fff;
    padding: 0.5rem 0.9rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-body);
    -webkit-tap-highlight-color: rgba(255,255,255,0.2);
  }

  .appbar-btn i { font-size: 1rem; }

  .appbar-theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    background: rgba(255,255,255,0.18);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    flex-shrink: 0;
    font-family: var(--font-body);
    -webkit-tap-highlight-color: rgba(255,255,255,0.2);
    transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
  }

  .appbar-theme-toggle:hover,
  .appbar-theme-toggle:focus-visible {
    background: rgba(255,255,255,0.28);
  }

  .appbar-theme-toggle:active {
    transform: scale(0.94);
  }

  @media (max-width: 360px) {
    .appbar {
      padding-left: 0.75rem;
      padding-right: 0.75rem;
    }

    .appbar-brand {
      font-size: 0.95rem;
    }

    .appbar-actions {
      gap: 0.35rem;
    }

    .appbar-btn {
      padding: 0.5rem 0.7rem;
    }
  }

  /* Full-screen overlay menu */
  .appmenu {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--bg-secondary);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

  .appmenu-toggle:checked ~ .appmenu {
    transform: translateX(0);
  }

  .appmenu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.2rem;
    padding-top: calc(1rem + env(safe-area-inset-top, 0px));
    background: var(--gradient-hero);
    color: #fff;
  }

  .appmenu-header h2 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 800;
    color: #fff;
    margin: 0;
    background: none !important;
    -webkit-text-fill-color: #fff !important;
    -webkit-background-clip: initial !important;
    background-clip: initial !important;
    animation: none !important;
  }

  .appmenu-header h2::after { display: none; }

  .appmenu-close {
    background: rgba(255,255,255,0.2);
    border: none;
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .appmenu-list {
    list-style: none;
    padding: 0.5rem;
    margin: 0;
  }

  .appmenu-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
    padding: 1.1rem 1rem;
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    text-align: left;
    font-size: 1.05rem;
    font-weight: 600;
    font-family: var(--font-body);
    border-radius: 12px;
    margin-bottom: 0.3rem;
    border: 1px solid transparent;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    -webkit-tap-highlight-color: rgba(91,110,245,0.12);
    transition: background 0.15s ease;
  }

  .appmenu-link:active {
    background: var(--accent-soft);
  }

  .appmenu-link.active {
    background: var(--accent-soft);
    border-color: var(--accent-hover);
    color: var(--accent-hover);
  }

  .appmenu-link i {
    color: var(--accent);
    font-size: 1.2rem;
    width: 1.5em;
    text-align: center;
  }

  .appmenu-link.active i { color: var(--accent-hover); }

  .appmenu-divider {
    height: 1px;
    background: var(--border);
    margin: 0.8rem 1rem;
  }

  .appmenu-section {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #62678f;
    padding: 0.8rem 1.2rem 0.3rem;
  }

  /* Card tap feedback */
  .paper-item, .project-card, .activity-card, .degree-card, .news-item, .journey-card {
    -webkit-tap-highlight-color: rgba(91,110,245,0.12);
  }
  .paper-item:active, .project-card:active, .activity-card:active, .news-item:active {
    background: var(--bg-secondary);
  }

  /* Larger tap targets for filter chips */
  .filter-btn, .exp-filters .filter-btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
  }

  /* Hero CTAs stack full-width */
  .hero-cta a {
    padding: 1rem 1.5rem;
    font-size: 1rem;
  }

  /* Page header stats wrap nicely */
  .page-header-stats { gap: 1.2rem; }
  .ph-stat { min-width: 80px; }
  .ph-stat .ph-num { font-size: 1.4rem; }

  /* Sidebar becomes a compact card on mobile */
  .sidebar {
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    margin: -1rem 0 1.5rem;
    padding: 1.5rem 1.2rem;
  }

  /* ===== Dark mode fixes for mobile menu + search ===== */
  .dark-mode .appmenu {
    background: #161830 !important;
  }
  .dark-mode .appmenu-link {
    color: #e8eaf6 !important;
  }
  .dark-mode .appmenu-link i {
    color: #7b8eff !important;
  }
  .dark-mode .appmenu-link.active {
    color: #7b8eff !important;
    background: rgba(123,142,255,0.16) !important;
    border-color: #7b8eff !important;
  }
  .dark-mode .appmenu-divider {
    background: #2a2d4d !important;
  }
  .dark-mode .appmenu-section {
    color: #9aa0c7 !important;
  }

  .dark-mode .search-container {
    background: #161830 !important;
  }
  .dark-mode #search-input {
    background: #0c0e1f !important;
    color: #e8eaf6 !important;
    border-color: #2a2d4d !important;
  }
  .dark-mode #search-input::placeholder {
    color: #6b7099 !important;
  }
  .dark-mode .search-results {
    background: #0c0e1f !important;
  }
  .dark-mode .search-result-item {
    background: #161830 !important;
  }
  .dark-mode .search-result-item h4 {
    color: #e8eaf6 !important;
  }
  .dark-mode .search-result-item p {
    color: #6b7099 !important;
  }
  .dark-mode .search-result-item:hover {
    background: #1f2244 !important;
  }
  .dark-mode .search-toggle {
    color: #9aa6e8 !important;
    border-color: #9aa6e8 !important;
  }
  .dark-mode .search-close {
    background: var(--gradient-1) !important;
  }

  /* Chat panel dark mode */
  .dark-mode .chat-panel {
    background: #161830 !important;
    border-color: #2a2d4d !important;
  }
  .dark-mode .chat-msg.bot {
    background: #0c0e1f !important;
    color: #e8eaf6 !important;
    border-color: #2a2d4d !important;
  }
  .dark-mode .chat-typing {
    background: #0c0e1f !important;
    border-color: #2a2d4d !important;
  }
  .dark-mode .chat-typing span {
    background: #6b7099 !important;
  }
  .dark-mode .chat-input {
    background: #0c0e1f !important;
    color: #e8eaf6 !important;
    border-color: #3a3e66 !important;
  }
  .dark-mode .chat-quick {
    background: rgba(123,142,255,0.16) !important;
    color: #7b8eff !important;
    border-color: #7b8eff !important;
  }
}

/* Desktop: hide app bar + menu */
@media (min-width: 701px) {
  .appbar, .appmenu-toggle, .appmenu { display: none !important; }
  nav#main-nav { display: flex !important; }
}

@media (prefers-reduced-motion: reduce) {
  .appmenu { transition: none; }
}

/* ===== Print Stylesheet ===== */
@media print {
  body {
    background: #fff !important;
    color: #000 !important;
    font-size: 11pt;
    animation: none !important;
  }
  nav, .appbar, .appmenu, .appmenu-toggle,
  .scroll-progress, .search-container, .back-to-top,
  .mobile-menu-toggle, .mobile-breadcrumb, .mobile-quick-nav,
  .hero, .currently-strip, footer,
  .chat-fab, .chat-panel, .cursor-orb,
  #research-network, .network-legend,
  .citation-spark, .quick-stats, .hf-stats,
  .cv-download-btn, .email-copy-wrapper, .copy-email-btn,
  .project-links, .paper-link, .activity-link,
  .filter-controls, .exp-filters,
  .spotlight::after, .spotlight::before,
  main section::before, main section:hover {
    display: none !important;
    box-shadow: none !important;
    transform: none !important;
  }
  .container.main-flex {
    display: block !important;
    max-width: 100% !important;
    padding: 0 !important;
  }
  .sidebar {
    width: 100% !important;
    position: static !important;
    max-height: none !important;
    border: 1px solid #ccc !important;
    margin-bottom: 1rem !important;
  }
  .sidebar-content { overflow: visible !important; }
  main { flex: none !important; }
  main section {
    break-inside: avoid;
    page-break-inside: avoid;
    box-shadow: none !important;
    border: 1px solid #ccc !important;
    margin-bottom: 1rem !important;
    padding: 1rem !important;
  }
  main section::before { display: none !important; }
  h2 { color: #000 !important; border-bottom: 2px solid #000 !important; }
  h2::after { display: none !important; }
  a { color: #000 !important; text-decoration: underline !important; }
  .fade-in, .reveal, .reveal-left, .reveal-right, .reveal-scale {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ===== Scroll Reveal Animations ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}

/* Staggered children */
.reveal-scale:nth-child(1), .reveal:nth-child(1) { transition-delay: 0.05s; }
.reveal-scale:nth-child(2), .reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal-scale:nth-child(3), .reveal:nth-child(3) { transition-delay: 0.15s; }
.reveal-scale:nth-child(4), .reveal:nth-child(4) { transition-delay: 0.2s; }
.reveal-scale:nth-child(5), .reveal:nth-child(5) { transition-delay: 0.25s; }
.reveal-scale:nth-child(6), .reveal:nth-child(6) { transition-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-left, .reveal-right, .reveal-scale {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ===== Cursor-Following Gradient Orb ===== */
.cursor-orb {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91,110,245,0.12) 0%, transparent 60%);
  filter: blur(60px);
  pointer-events: none;
  z-index: -1;
  transform: translate(-50%, -50%);
  left: var(--cx, 50%);
  top: var(--cy, 50%);
  transition: left 0.3s ease, top 0.3s ease;
}

.dark-mode .cursor-orb {
  background: radial-gradient(circle, rgba(123,142,255,0.10) 0%, transparent 60%);
}

@media (max-width: 700px) {
  .cursor-orb { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .cursor-orb { display: none; }
}

/* ===== 3D Card Tilt ===== */
.tilt {
  transform-style: preserve-3d;
  transition: transform 0.15s ease;
}

.tilt-inner {
  transform: translateZ(30px);
}

@media (max-width: 700px) {
  .tilt { transform: none !important; }
}
@media (prefers-reduced-motion: reduce) {
  .tilt { transform: none !important; }
}

/* ===== Page Transitions (View Transitions API) ===== */
@keyframes vt-fade-out {
  to { opacity: 0; transform: scale(0.98); }
}
@keyframes vt-fade-in {
  from { opacity: 0; transform: scale(1.02); }
  to { opacity: 1; transform: scale(1); }
}

::view-transition-old(root) {
  animation: vt-fade-out 0.2s ease forwards;
}
::view-transition-new(root) {
  animation: vt-fade-in 0.25s ease forwards;
}

/* Fallback for browsers without View Transitions API */
.vt-leaving {
  animation: vt-fade-out 0.2s ease forwards;
}

/* ===== Blog Share Buttons ===== */
.blog-share {
  display: flex;
  gap: 0.6rem;
  margin: 1.5rem 0;
  flex-wrap: wrap;
}

.blog-share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  background: var(--bg-primary);
  cursor: pointer;
  font-family: var(--font-body);
  transition: all var(--dur) var(--ease);
}

.blog-share-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.blog-share-btn:active {
  transform: scale(0.97);
}

/* ===== Chat Widget ===== */
.chat-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient-hero);
  border: none;
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  z-index: 998;
  box-shadow: 0 4px 20px rgba(91,110,245,0.35);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), bottom 0.3s var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* When back-to-top is visible (scrolled down), move chat FAB above it */
body:has(.back-to-top.visible) .chat-fab {
  bottom: 180px;
}
.chat-fab.shifted {
  bottom: 180px;
}

.chat-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(91,110,245,0.5);
}

.chat-fab:active {
  transform: scale(0.95);
}

.chat-fab.hidden {
  display: none;
}

.chat-panel {
  position: fixed;
  bottom: 90px;
  right: 24px;
  width: 380px;
  max-width: calc(100vw - 32px);
  max-height: 540px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 12px 48px rgba(10,12,30,0.2);
  z-index: 999;
  display: none;
  flex-direction: column;
  overflow: hidden;
}

.chat-panel.active {
  display: flex;
  animation: chat-pop 0.2s var(--ease);
}

@keyframes chat-pop {
  from { opacity: 0; transform: translateY(12px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.chat-header {
  background: var(--gradient-hero);
  color: #fff;
  padding: 1rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chat-header-info {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.chat-header-info i {
  font-size: 1.3rem;
  background: rgba(255,255,255,0.2);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-header h3 {
  margin: 0;
  font-size: 0.95rem;
  font-family: var(--font-display);
  font-weight: 700;
}

.chat-header span {
  font-size: 0.72rem;
  opacity: 0.85;
}

.chat-close {
  background: rgba(255,255,255,0.2);
  border: none;
  color: #fff;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  min-height: 200px;
  max-height: 360px;
  -webkit-overflow-scrolling: touch;
}

.chat-msg {
  max-width: 85%;
  padding: 0.7rem 1rem;
  border-radius: 14px;
  font-size: 0.88rem;
  line-height: 1.5;
  word-wrap: break-word;
}

.chat-msg.bot {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
  align-self: flex-start;
  border: 1px solid var(--border);
}

.chat-msg.user {
  background: var(--gradient-1);
  color: #fff;
  border-bottom-right-radius: 4px;
  align-self: flex-end;
}

.chat-msg.error {
  background: rgba(245,158,11,0.1);
  color: var(--warning);
  border: 1px solid rgba(245,158,11,0.3);
  align-self: flex-start;
}

.chat-typing {
  display: flex;
  gap: 4px;
  padding: 0.7rem 1rem;
  background: var(--bg-primary);
  border-radius: 14px;
  border-bottom-left-radius: 4px;
  align-self: flex-start;
  border: 1px solid var(--border);
}

.chat-typing span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: typing-bounce 1.2s ease-in-out infinite;
}

.chat-typing span:nth-child(2) { animation-delay: 0.15s; }
.chat-typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

.chat-quick-replies {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
}

.chat-quick {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 16px;
  padding: 0.35rem 0.8rem;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-body);
  transition: all var(--dur) var(--ease);
}

.chat-quick:hover {
  background: var(--accent);
  color: #fff;
}

.chat-input-bar {
  display: flex;
  gap: 0.5rem;
  padding: 0.8rem;
  border-top: 1px solid var(--border);
}

.chat-input {
  flex: 1;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
  font-size: 0.9rem;
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  outline: none;
}

.chat-input:focus {
  border-color: var(--accent);
}

.chat-send {
  background: var(--gradient-1);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 0.6rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: transform var(--dur) var(--ease);
}

.chat-send:active {
  transform: scale(0.95);
}

@media (max-width: 700px) {
  .chat-panel {
    bottom: 0;
    right: 0;
    width: 100vw;
    max-width: 100vw;
    max-height: 100vh;
    border-radius: 0;
    border: none;
  }
  .chat-fab {
    bottom: 16px;
    right: 16px;
  }
  /* On mobile, move chat FAB above back-to-top when scrolled */
  body:has(.back-to-top.visible) .chat-fab {
    bottom: 165px;
  }
  .chat-fab.shifted {
    bottom: 165px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .chat-typing span { animation: none; }
  .chat-panel.active { animation: none; }
}

/* ===== Landing Page ===== */
.landing-hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: 2rem 1.5rem 6rem;
  background: var(--gradient-hero);
  color: #fff;
}

.landing-hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 30%, rgba(255,255,255,0.12) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 70%, rgba(240,147,251,0.15) 0%, transparent 50%);
  animation: landing-bg-drift 20s ease-in-out infinite;
}

@keyframes landing-bg-drift {
  0%, 100% { transform: scale(1) translate(0,0); }
  50% { transform: scale(1.1) translate(2%, -2%); }
}

.landing-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.landing-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  background: rgba(255,255,255,0.15);
  padding: 0.5rem 1.2rem;
  border-radius: 20px;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(6px);
}

.landing-name {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 0.8rem;
  background: linear-gradient(90deg, #fff, #d6dcff, #f0c4ff, #fff);
  background-size: 300% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: hero-name-shift 8s ease-in-out infinite;
}

.landing-roles {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 3vw, 1.6rem);
  font-weight: 600;
  min-height: 2em;
  margin-bottom: 1.2rem;
}

.landing-roles .ty-text {
  background: linear-gradient(90deg, #fff, #d6dcff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.landing-roles .ty-text::after {
  content: '|';
  margin-left: 2px;
  animation: caret 1s step-end infinite;
  font-weight: 300;
  -webkit-text-fill-color: rgba(255,255,255,0.6);
}

.landing-tagline {
  font-size: 1.05rem;
  line-height: 1.6;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 2rem;
}

.landing-cta {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
}

.landing-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--dur) var(--ease);
  border: 1px solid rgba(255,255,255,0.35);
}

.landing-btn.primary {
  background: #fff;
  color: var(--accent-hover);
}

.landing-btn.primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}

.landing-btn.ghost {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

.landing-btn.ghost:hover {
  background: rgba(255,255,255,0.22);
  transform: translateY(-3px);
}

.landing-btn.large {
  padding: 1rem 2rem;
  font-size: 1.05rem;
}

.scroll-indicator {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.6);
  font-size: 1.5rem;
  text-decoration: none;
  animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* Landing stats bar */
.landing-stats {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
}

.landing-stats-inner {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  max-width: 900px;
  margin: 0 auto;
}

.lstat {
  text-align: center;
}

.lstat-num {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--accent);
  display: block;
  line-height: 1;
}

.lstat-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.4rem;
  display: block;
}

/* Landing sections */
.landing-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

/* Research grid */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
  margin-top: 2rem;
}

.research-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.8rem 1.5rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--dur-slow) var(--ease);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-1);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

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

.research-card:hover::before { opacity: 1; }

.research-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.research-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text-primary);
  background: none;
  -webkit-text-fill-color: var(--text-primary);
  -webkit-background-clip: initial;
  background-clip: initial;
  animation: none;
}

.research-card p {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text-muted);
  margin: 0;
}

/* Featured projects */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.4rem;
  margin-top: 2rem;
}

.featured-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--dur-slow) var(--ease);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.featured-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-1);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

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

.featured-card:hover::before { opacity: 1; }

.featured-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
}

.featured-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text-primary);
  background: none;
  -webkit-text-fill-color: var(--text-primary);
  -webkit-background-clip: initial;
  background-clip: initial;
  animation: none;
}

.featured-card p {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text-muted);
  margin: 0 0 1rem;
  flex: 1;
}

.featured-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* Landing news */
.landing-news {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.landing-news-item {
  display: flex;
  gap: 1rem;
  padding: 1rem 1.2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-primary);
  transition: all var(--dur) var(--ease);
}

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

.landing-news-date {
  font-weight: 700;
  color: var(--accent);
  font-size: 0.82rem;
  min-width: 70px;
  flex-shrink: 0;
}

.landing-more {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.2rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: gap var(--dur) var(--ease);
}

.landing-more:hover { gap: 0.8rem; }

/* Mini about */
.mini-about {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  margin-top: 1.5rem;
}

.mini-about-photo {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid transparent;
  background: linear-gradient(var(--bg-secondary), var(--bg-secondary)) padding-box,
              var(--gradient-1) border-box;
  box-shadow: 0 4px 20px rgba(91,110,245,0.18);
  flex-shrink: 0;
}

.mini-about-text {
  flex: 1;
}

.mini-about-text p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-primary);
  margin: 0 0 1rem;
}

/* Contact CTA */
.landing-cta-section {
  background: var(--gradient-hero);
  color: #fff;
  text-align: center;
  padding: 5rem 1.5rem;
  margin-top: 2rem;
}

.landing-cta-inner {
  max-width: 600px;
  margin: 0 auto;
}

.landing-cta-section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  color: #fff;
  margin: 0 0 0.8rem;
  background: none;
  -webkit-text-fill-color: #fff;
  -webkit-background-clip: initial;
  background-clip: initial;
  animation: none;
}

.landing-cta-section h2::after { display: none; }

.landing-cta-section p {
  font-size: 1.05rem;
  opacity: 0.9;
  margin: 0 0 1.5rem;
}

.landing-social {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.landing-social a {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  text-decoration: none;
  transition: all var(--dur) var(--ease);
}

.landing-social a:hover {
  background: #fff;
  color: var(--accent-hover);
  transform: translateY(-3px) scale(1.1);
}

/* Landing responsive */
@media (max-width: 700px) {
  .landing-hero { min-height: 90vh; padding: 4rem 1.2rem 4rem; }
  .landing-cta { flex-direction: column; align-items: stretch; }
  .landing-btn { justify-content: center; }
  .landing-stats-inner { gap: 1.5rem; }
  .lstat { min-width: 80px; }
  .mini-about { flex-direction: column; align-items: center; text-align: center; }
  .mini-about-photo { width: 140px; height: 140px; margin-bottom: 1rem; }
  .landing-section { padding: 2.5rem 1.2rem; }
  .research-grid { grid-template-columns: 1fr; }
  .featured-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .landing-hero-bg, .scroll-indicator, .landing-name { animation: none; }
  .landing-roles .ty-text::after { animation: none; }
}

/* ===== Landing: What I Do ===== */
.what-i-do-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.4rem;
  margin-top: 2rem;
}

.what-i-do-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--dur-slow) var(--ease);
  position: relative;
  overflow: hidden;
}

.what-i-do-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-1);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.what-i-do-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.what-i-do-card:hover::before { opacity: 1; }

.what-i-do-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
}

.what-i-do-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.6rem;
  color: var(--text-primary);
  background: none;
  -webkit-text-fill-color: var(--text-primary);
  -webkit-background-clip: initial;
  background-clip: initial;
  animation: none;
}

.what-i-do-card p {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text-muted);
  margin: 0;
}

/* ===== Landing: Tech Stack ===== */
.tech-stack-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1rem;
}

.tech-group {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.tech-group-label {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  min-width: 140px;
  padding-top: 0.5rem;
  flex-shrink: 0;
}

.tech-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  flex: 1;
}

.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--dur) var(--ease);
}

.tech-pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.tech-pill i {
  font-size: 0.9rem;
}

/* ===== Landing: Career Highlights ===== */
.career-timeline {
  display: flex;
  gap: 0;
  margin-top: 2rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 1rem;
  position: relative;
}

.career-timeline::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-violet), var(--accent-soft));
  border-radius: 3px;
}

.career-item {
  flex: 1;
  min-width: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  padding: 0 0.5rem;
}

.career-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--gradient-1);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 2px var(--accent);
  margin-bottom: 0.8rem;
  z-index: 1;
  flex-shrink: 0;
}

.career-year {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
  margin-bottom: 0.3rem;
}

.career-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
  display: block;
}

@media (max-width: 700px) {
  .what-i-do-grid { grid-template-columns: 1fr; }
  .tech-group { flex-direction: column; gap: 0.5rem; }
  .tech-group-label { min-width: auto; padding-top: 0; }
  .career-timeline { overflow-x: auto; }
  .career-item { min-width: 120px; }
}