/* ─────────────────────────────────────────────────────────────
   DESIGN TOKENS
   ───────────────────────────────────────────────────────────── */
:root {
  --bg:           #ffffff;
  --surface:      #f8fafc;
  --surface-2:    #f1f5f9;
  --border:       #e2e8f0;
  --border-light: rgba(0,0,0,0.05);

  --text:          #0f172a;
  --text-secondary:#334155;
  --text-muted:    #64748b;

  --accent:       #6366f1;
  --accent-dark:  #4f46e5;
  --accent-light: #eef2ff;
  --accent-glow:  rgba(99,102,241,0.22);

  --conference:    #0284c7;
  --conference-bg: #e0f2fe;
  --workshop:      #7c3aed;
  --workshop-bg:   #ede9fe;
  --patent:        #059669;
  --patent-bg:     #d1fae5;
  --review:        #b45309;
  --review-bg:     #fff7ed;
  --oral-color:    #b45309;
  --oral-bg:       #fef3c7;

  --font:      'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --nav-h:     64px;
  --max-w:     1000px;
  --r-sm:      6px;
  --r-md:      14px;
  --r-full:    9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.05);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --t:    0.2s;
}

/* ─────────────────────────────────────────────────────────────
   DARK MODE TOKENS
   ───────────────────────────────────────────────────────────── */
body.dark {
  --bg:           #0f1117;
  --surface:      #1a1d27;
  --surface-2:    #22263a;
  --border:       #2e3350;
  --border-light: rgba(255,255,255,0.06);

  --text:          #f1f5f9;
  --text-secondary:#cbd5e1;
  --text-muted:    #94a3b8;

  --accent:       #818cf8;
  --accent-dark:  #6366f1;
  --accent-light: #1e1f3a;
  --accent-glow:  rgba(129,140,248,0.25);

  --conference-bg: #0c2340;
  --workshop-bg:   #1e1040;
  --patent-bg:     #052e1c;
  --review-bg:     #2a1800;
  --oral-bg:       #2a1e00;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35), 0 2px 6px rgba(0,0,0,0.2);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45), 0 4px 12px rgba(0,0,0,0.3);

  background: var(--bg);
  color: var(--text);
}

body.dark .hero {
  background:
    radial-gradient(ellipse 70% 60% at 110% 10%, rgba(129,140,248,0.11) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at -10% 90%, rgba(6,182,212,0.07) 0%, transparent 60%),
    var(--bg);
}
body.dark .hero::before { opacity: 0.12; }
body.dark #navbar { background: rgba(15,17,23,0.85); }
body.dark .award-badge { background: #2a1e00; color: #fbbf24; border-color: #78450a; }
body.dark .project-status.ongoing { background: #0c2340; color: #38bdf8; border-color: #0369a1; }
body.dark .project-status.under-review { background: #2a1800; color: #fbbf24; border-color: #92400e; }
body.dark .nav-links { background: rgba(15,17,23,0.97); }

/* ─────────────────────────────────────────────────────────────
   RESET & BASE
   ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html   { scroll-behavior: smooth; font-size: 16px; }
body   { font-family: var(--font); background: var(--bg); color: var(--text);
         -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; line-height: 1.6; }
img    { display: block; max-width: 100%; }
a      { color: inherit; }
section[id] { scroll-margin-top: calc(var(--nav-h) + 8px); }

/* ─────────────────────────────────────────────────────────────
   NAVBAR
   ───────────────────────────────────────────────────────────── */
#navbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: box-shadow var(--t) var(--ease);
}
#navbar.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.07); }

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-inner > a:first-child { flex: 1; }

.nav-brand {
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--accent);
  text-decoration: none;
  width: 36px;
  height: 36px;
  background: var(--accent-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.nav-link {
  font-size: 0.8375rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.4rem 0.7rem;
  border-radius: var(--r-sm);
  transition: color var(--t) var(--ease), background var(--t) var(--ease);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active { color: var(--text); background: var(--surface); }

.btn-cv {
  color: var(--accent) !important;
  border: 1.5px solid var(--accent) !important;
  margin-left: 0.375rem;
  padding: 0.35rem 0.8rem;
}
.btn-cv:hover {
  background: var(--accent) !important;
  color: #fff !important;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--r-sm);
}
.nav-toggle:hover { background: var(--surface); }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: none;
  border: 2.5px solid var(--border);
  border-radius: var(--r-full);
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background var(--t) var(--ease);
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-light);
}

/* ─────────────────────────────────────────────────────────────
   HERO
   ───────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  padding-top: var(--nav-h);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 60% at 110% 10%, rgba(99,102,241,0.09) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at -10% 90%, rgba(6,182,212,0.07) 0%, transparent 60%),
    var(--bg);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, #cbd5e1 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: 0.45;
  pointer-events: none;
}

.hero-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 3.5rem;
  align-items: center;
  position: relative;
  width: 100%;
}

.hero-eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero-name {
  font-size: 3.75rem;
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.045em;
  color: var(--text);
  margin-bottom: 0.875rem;
}

.hero-affil {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}
.advisor-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.advisor-link:hover { text-decoration: underline; }
.institution-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.institution-link:hover { text-decoration: underline; }
.lab-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.lab-link:hover { text-decoration: underline; }
.hero-bio {
  font-size: 1rem;
  line-height: 1.78;
  color: var(--text-secondary);
  max-width: 700px;
  margin-bottom: 0.875rem;
}
.hero-bio strong { color: var(--text); font-weight: 600; }

.hero-collab {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.hero-collab strong { color: var(--text-secondary); }

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 2rem;
}
.tag {
  font-size: 0.775rem;
  font-weight: 500;
  color: var(--accent-dark);
  background: var(--accent-light);
  padding: 0.28rem 0.75rem;
  border-radius: var(--r-full);
  border: 1px solid rgba(99,102,241,0.2);
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.575rem 1.05rem;
  border-radius: var(--r-md);
  text-decoration: none;
  cursor: pointer;
  border: 1.5px solid transparent;
  white-space: nowrap;
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease),
              background var(--t) var(--ease), border-color var(--t) var(--ease),
              color var(--t) var(--ease);
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}
.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.btn.icon-only { padding: 0.575rem 0.75rem; }

/* ─── Avatar ─── */
.hero-photo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}
.avatar-ring {
  width: 250px;
  height: 250px;
  border-radius: 50%;
  padding: 3px;
  background: linear-gradient(135deg, var(--accent) 0%, #06b6d4 100%);
  box-shadow: 0 20px 60px var(--accent-glow), 0 8px 20px rgba(0,0,0,0.1);
  animation: float 7s ease-in-out infinite;
  flex-shrink: 0;
}
.avatar-ring img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 4px solid #fff;
}
@keyframes float {
  0%, 100% { transform: translateY(0px);   }
  50%       { transform: translateY(-10px); }
}

.stat-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}
.stat-pill {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.25rem 0.65rem;
  border-radius: var(--r-full);
}
.stat-pill strong { color: var(--accent); font-weight: 700; }

.photo-social {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-top: 1rem;
}
.photo-social a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.83rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.photo-social a i {
  width: 1rem;
  text-align: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}
.photo-social a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-light);
}

/* ─────────────────────────────────────────────────────────────
   SECTION SHARED
   ───────────────────────────────────────────────────────────── */
.section     { padding: 5.5rem 0; }
.section-alt { background: var(--surface); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-title {
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 0.875rem;
  padding-bottom: 0.875rem;
  position: relative;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 34px; height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

.section-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  margin-top: -0.25rem;
}

/* ─────────────────────────────────────────────────────────────
   NEWS
   ───────────────────────────────────────────────────────────── */
.news-list {
  list-style: none;
  max-height: 22rem;
  overflow-y: auto;
  padding-right: 0.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.news-list::-webkit-scrollbar { width: 4px; }
.news-list::-webkit-scrollbar-track { background: transparent; }
.news-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

.news-item {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 1.5rem;
  align-items: baseline;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
}
.news-item:last-child { border-bottom: none; }

.news-date {
  font-size: 0.775rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
  white-space: nowrap;
  padding-top: 0.1rem;
}

.news-body {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--text-secondary);
}
.news-body strong { color: var(--text); font-weight: 600; }
.news-body em     { font-style: italic; }

.chip {
  display: inline-flex;
  align-items: center;
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid rgba(99,102,241,0.25);
  padding: 0.14rem 0.55rem;
  border-radius: var(--r-full);
  text-decoration: none;
  margin-left: 0.375rem;
  vertical-align: middle;
  transition: background var(--t) var(--ease), color var(--t) var(--ease);
}
.chip:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

.oral-chip {
  display: inline-flex;
  align-items: center;
  font-size: 0.73rem;
  font-weight: 700;
  color: var(--oral-color);
  background: var(--oral-bg);
  border: 1px solid #fde68a;
  padding: 0.14rem 0.55rem;
  border-radius: var(--r-full);
  margin-left: 0.375rem;
  vertical-align: middle;
}

/* ─────────────────────────────────────────────────────────────
   PUBLICATIONS
   ───────────────────────────────────────────────────────────── */
.pub-inner {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.pub-thumb {
  flex-shrink: 0;
  width: 268px;
  height: 179px;
  border-radius: var(--r-sm);
  background: var(--surface) center / cover no-repeat;
  border: 1.5px dashed var(--border);
}

.pub-content { flex: 1; min-width: 0; }

.pub-title-link {
  color: inherit;
  text-decoration: none;
  transition: color var(--t) var(--ease);
}
.pub-title-link:hover { color: var(--accent); }

.pub-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.625rem 1.75rem 1.625rem 2rem;
  margin-bottom: 1.125rem;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--t) var(--ease), transform var(--t) var(--ease);
}
.pub-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
}
.pub-card.type-conference::before { background: var(--conference); }
.pub-card.type-workshop::before   { background: var(--workshop); }
.pub-card.type-patent::before     { background: var(--patent); }
.pub-card.type-review::before     { background: var(--review); }
.pub-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.pub-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.7rem;
}

.venue-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.22rem 0.65rem;
  border-radius: var(--r-sm);
}
.venue-badge.conference { background: var(--conference-bg); color: var(--conference); }
.venue-badge.workshop   { background: var(--workshop-bg);   color: var(--workshop);   }
.venue-badge.patent     { background: var(--patent-bg);     color: var(--patent);     }
.venue-badge.review     { background: var(--review-bg);     color: var(--review);     }

.oral-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--oral-color);
  background: var(--oral-bg);
  border: 1px solid #fde68a;
  padding: 0.22rem 0.6rem;
  border-radius: var(--r-sm);
}

.award-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  color: #92400e;
  background: #fffbeb;
  border: 1px solid #fcd34d;
  padding: 0.22rem 0.6rem;
  border-radius: var(--r-sm);
}

.pub-title {
  font-size: 1.025rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 0.3rem;
}

.pub-authors {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}
.pub-authors strong { color: var(--text-secondary); font-weight: 600; }

.pub-venue-detail {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 0.75rem;
}

.pub-desc {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}
.pub-desc strong { color: var(--text); font-weight: 600; }

.pub-links { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  padding: 0.3rem 0.7rem;
  border: 1.5px solid rgba(99,102,241,0.3);
  border-radius: var(--r-sm);
  background: var(--accent-light);
  transition: background var(--t) var(--ease), color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.pub-link:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ─────────────────────────────────────────────────────────────
   PROJECTS
   ───────────────────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.125rem;
}

.project-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.375rem;
  display: flex;
  gap: 1rem;
  transition: box-shadow var(--t) var(--ease), transform var(--t) var(--ease);
}
.project-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }

.project-icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 10px;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  margin-top: 0.1rem;
}

.project-body { flex: 1; min-width: 0; }

.project-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.375rem;
}

.project-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text);
}

.project-status {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: var(--r-full);
}
.project-status.ongoing {
  color: #0369a1;
  background: #e0f2fe;
  border: 1px solid #bae6fd;
}
.project-status.under-review {
  color: #92400e;
  background: #fff7ed;
  border: 1px solid #fed7aa;
}

.project-collab {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.project-collab strong { color: var(--text-secondary); font-weight: 600; }

.project-desc {
  font-size: 0.875rem;
  line-height: 1.65;
  color: #475569;
  margin-bottom: 0.8rem;
}
.project-desc strong { color: var(--text-secondary); font-weight: 600; }

.project-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.ptag {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.18rem 0.52rem;
  border-radius: 4px;
}

/* ─────────────────────────────────────────────────────────────
   TIMELINE (Experience)
   ───────────────────────────────────────────────────────────── */
.timeline { position: relative; padding-left: 1.5rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0.4rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: var(--border);
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  margin-bottom: 2.25rem;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -1.175rem;
  top: 0.45rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-content {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.375rem 1.5rem;
  transition: box-shadow var(--t) var(--ease);
}
.timeline-content:hover { box-shadow: var(--shadow-md); }

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.875rem;
  flex-wrap: wrap;
}

.timeline-role {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.timeline-org {
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 600;
}

.timeline-date {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  background: var(--surface);
  padding: 0.25rem 0.65rem;
  border-radius: var(--r-full);
  border: 1px solid var(--border);
}

.timeline-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.timeline-bullets li {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-secondary);
  padding-left: 1rem;
  position: relative;
}
.timeline-bullets li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.timeline-bullets li strong { color: var(--text); font-weight: 600; }

/* ─────────────────────────────────────────────────────────────
   TEACHING
   ───────────────────────────────────────────────────────────── */
.teaching-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.teaching-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.125rem 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  transition: box-shadow var(--t) var(--ease), transform var(--t) var(--ease);
}
.teaching-item:hover { box-shadow: var(--shadow-sm); transform: translateY(-2px); }

.teaching-icon {
  color: var(--accent);
  font-size: 1rem;
  margin-top: 0.1rem;
  min-width: 16px;
}

.teaching-role {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.2rem;
}

.teaching-course {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.15rem;
}

.teaching-org {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ─────────────────────────────────────────────────────────────
   FOOTER
   ───────────────────────────────────────────────────────────── */
footer { background: var(--text); padding: 2rem 0; }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
footer span { font-size: 0.875rem; color: #94a3b8; }
.footer-links { display: flex; gap: 1.125rem; }
.footer-links a {
  color: #64748b;
  font-size: 1.05rem;
  text-decoration: none;
  transition: color var(--t) var(--ease);
}
.footer-links a:hover { color: #f8fafc; }

/* ─────────────────────────────────────────────────────────────
   SCROLL ANIMATIONS
   ───────────────────────────────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ─────────────────────────────────────────────────────────────
   RESPONSIVE
   ───────────────────────────────────────────────────────────── */
@media (max-width: 760px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
    padding: 3rem 1.5rem;
  }
  .hero-photo  { order: -1; }
  .hero-name   { font-size: 2.75rem; }
  .hero-tags, .hero-links { justify-content: center; }
  .hero-bio, .hero-affil, .hero-collab { justify-content: center; margin-inline: auto; }

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

  .news-item { grid-template-columns: 74px 1fr; gap: 1rem; }

  .timeline { padding-left: 1rem; }
  .timeline-header { flex-direction: column; gap: 0.5rem; }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(255,255,255,0.97);
    padding: 0.875rem 1.5rem;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 30px rgba(0,0,0,0.09);
    gap: 0.25rem;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }

  .footer-inner { justify-content: center; text-align: center; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 2.25rem; }
  .btn       { font-size: 0.82rem; padding: 0.5rem 0.875rem; }
  .section   { padding: 4rem 0; }
  .pub-card  { padding: 1.25rem 1.25rem 1.25rem 1.625rem; }
  .pub-inner { flex-direction: column; }
  .pub-thumb { width: 100%; height: 160px; }
}