/* ═══════════════════════════════════════════════════════
   DR. ALOK TIWARI — PORTFOLIO  
   Premium Dark Academic · Healthcare AI · Edition 2025
   ═══════════════════════════════════════════════════════ */

/* ── TOKENS ── */
:root {
  --ink:       #0a1122;
  --ink-soft:  #0f1a2e;
  --surface:   rgba(255,255,255,0.055);
  --surface-2: rgba(255,255,255,0.09);
  --glass-border: rgba(255,255,255,0.10);
  --text:      #dde8f5;
  --text-muted:#7f9ab8;
  --teal:      #2dd4bf;
  --teal-glow: rgba(45,212,191,0.18);
  --gold:      #f59e0b;
  --gold-glow: rgba(245,158,11,0.16);
  --blue:      #60a5fa;
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 32px;
  --shadow:    0 24px 64px rgba(0,0,0,0.4);
  --container: 1160px;
  --ease:      cubic-bezier(0.23,1,0.32,1);
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--ink);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse 80% 50% at 10% 5%, rgba(45,212,191,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 90% 15%, rgba(96,165,250,0.07) 0%, transparent 55%);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; }

/* ── NOISE OVERLAY ── */
.noise-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.028;
  mix-blend-mode: overlay;
}

/* ── CONTAINER ── */
.container {
  width: min(calc(100% - 2.5rem), var(--container));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* ── GLASS UTILITY ── */
.glass {
  background: linear-gradient(135deg, rgba(255,255,255,0.07) 0%, rgba(255,255,255,0.03) 100%);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* ─────────────────────────────────────────
   HEADER / NAV
───────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.site-header.scrolled {
  background: rgba(10,17,34,0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.07);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: 'DM Serif Display', serif;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}
.brand-glyph {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--teal), var(--blue));
  display: grid; place-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0;
  flex-shrink: 0;
}
.brand-glyph--sm {
  width: 30px; height: 30px;
  border-radius: 8px;
  font-size: 0.65rem;
}
.brand-name { color: var(--text); }

/* Nav links */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--text); background: var(--surface); }
.nav-cta {
  background: var(--surface-2);
  color: var(--teal);
  border: 1px solid rgba(45,212,191,0.25);
  margin-left: 0.5rem;
}
.nav-cta:hover { background: rgba(45,212,191,0.12); color: var(--teal); }

/* Hamburger */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  border: 1px solid var(--glass-border);
  background: var(--surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0 10px;
}
.menu-toggle span {
  display: block;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ─────────────────────────────────────────
   HERO
───────────────────────────────────────── */
.hero-section {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 7rem 0 4rem;
  position: relative;
  overflow: hidden;
}

/* Background grid */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
  pointer-events: none;
}

/* Orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  animation: orbFloat 8s ease-in-out infinite;
}
.hero-orb--1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(45,212,191,0.15) 0%, transparent 70%);
  top: -10%; left: -5%;
  animation-delay: 0s;
}
.hero-orb--2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(96,165,250,0.12) 0%, transparent 70%);
  top: 20%; right: -8%;
  animation-delay: -3s;
}
.hero-orb--3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(245,158,11,0.08) 0%, transparent 70%);
  bottom: 10%; left: 30%;
  animation-delay: -5s;
}
@keyframes orbFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-24px) scale(1.04); }
}

.hero-inner {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: center;
}

/* Hero left */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  background: rgba(45,212,191,0.09);
  border: 1px solid rgba(45,212,191,0.22);
  padding: 0.45rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.8rem;
}
.badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 10px var(--teal);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 6px var(--teal); opacity: 1; }
  50% { box-shadow: 0 0 14px var(--teal); opacity: 0.7; }
}

.hero-title {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2.8rem, 5.5vw, 5.2rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 1.5rem;
}
.title-line { display: block; }
.title-line--italic { font-style: italic; color: var(--teal); }
.title-accent {
  display: block;
  background: linear-gradient(90deg, var(--gold), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-bio {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 2rem;
  max-width: 54ch;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s;
  border: none;
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary {
  background: linear-gradient(135deg, var(--teal) 0%, #06b6d4 100%);
  color: var(--ink);
  box-shadow: 0 8px 24px rgba(45,212,191,0.3);
}
.btn--primary:hover { box-shadow: 0 12px 32px rgba(45,212,191,0.4); }
.btn--ghost {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--glass-border);
}
.btn--ghost:hover { background: var(--surface-2); }
.btn--full { width: 100%; justify-content: center; }

/* Social pills */
.hero-socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.social-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--glass-border);
  font-size: 0.78rem;
  color: var(--text-muted);
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}
.social-pill:hover {
  background: var(--surface-2);
  color: var(--text);
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-1px);
}
.social-pill img {
  width: 16px; height: 16px;
  filter: invert(1);
  opacity: 0.7;
}

/* Hero right */
.hero-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.profile-shell {
  position: relative;
  width: 300px;
  height: 360px;
}
.profile-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 1.5px dashed rgba(45,212,191,0.3);
  animation: spin 20s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.profile-img-wrap {
  width: 100%; height: 100%;
  border-radius: 40% 60% 60% 40% / 40% 40% 60% 60%;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(45,212,191,0.15), rgba(96,165,250,0.1));
  border: 1px solid rgba(45,212,191,0.25);
  box-shadow: 0 32px 80px rgba(0,0,0,0.5), inset 0 0 40px rgba(45,212,191,0.05);
}
.profile-img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
}
.profile-tag {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(10,17,34,0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
  animation: tagFloat 4s ease-in-out infinite;
}
.profile-tag--1 { top: 10%; left: -30%; animation-delay: 0s; border-color: rgba(45,212,191,0.3); }
.profile-tag--2 { bottom: 20%; right: -28%; animation-delay: -1.5s; border-color: rgba(96,165,250,0.3); }
.profile-tag--3 { bottom: 5%; left: -18%; animation-delay: -3s; border-color: rgba(245,158,11,0.3); }
@keyframes tagFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.tag-icon { font-size: 0.85rem; }

/* Stats strip */
.stat-strip {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  width: 100%;
  justify-content: center;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  text-align: center;
}
.stat-num {
  font-family: 'DM Serif Display', serif;
  font-size: 2rem;
  color: var(--teal);
  line-height: 1;
}
.stat-plus {
  font-family: 'DM Serif Display', serif;
  font-size: 1.2rem;
  color: var(--teal);
}
.stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  white-space: nowrap;
}
.stat-divider {
  width: 1px; height: 40px;
  background: var(--glass-border);
}

/* Scroll indicator */
.scroll-indicator {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 0 0;
  margin: 0 auto;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  z-index: 1;
  position: relative;
}
.scroll-line {
  width: 48px; height: 1px;
  background: linear-gradient(90deg, var(--teal), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; width: 48px; }
  50% { opacity: 1; width: 64px; }
}

/* ─────────────────────────────────────────
   MARQUEE
───────────────────────────────────────── */
.marquee-band {
  overflow: hidden;
  background: linear-gradient(90deg, rgba(45,212,191,0.08), rgba(96,165,250,0.08), rgba(45,212,191,0.08));
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
  padding: 0.85rem 0;
  position: relative;
  z-index: 2;
}
.marquee-track {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  white-space: nowrap;
  animation: marquee 28s linear infinite;
  width: max-content;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}
@keyframes marquee { to { transform: translateX(-50%); } }
.marquee-dot { color: var(--teal); font-size: 0.55rem; }

/* ─────────────────────────────────────────
   SECTIONS
───────────────────────────────────────── */
.section {
  padding: 6rem 0;
  position: relative;
}
.section--dark {
  background: rgba(5,11,22,0.6);
}

.section-head {
  text-align: center;
  margin-bottom: 4rem;
}
.section-kicker {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.75rem;
  display: block;
}
.section-title {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2rem, 3.5vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
}
.section-title em {
  font-style: italic;
  color: var(--teal);
}
.section-sub {
  margin-top: 0.8rem;
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 50ch;
  margin-left: auto;
  margin-right: auto;
}

/* ─────────────────────────────────────────
   ABOUT
───────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.about-left .section-kicker { margin-bottom: 0.75rem; }
.about-left .section-title { margin-bottom: 1.8rem; text-align: left; }
.about-body { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.8rem; }
.about-body p { color: var(--text-muted); line-height: 1.8; }
.about-body strong { color: var(--text); font-weight: 600; }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  font-size: 0.78rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  transition: background 0.2s, color 0.2s;
}
.tag:hover { background: var(--surface-2); color: var(--text); }

.about-right { display: flex; flex-direction: column; gap: 1rem; }
.edu-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.2rem 1.4rem;
  border-radius: var(--radius-md);
  transition: transform 0.25s var(--ease), box-shadow 0.25s;
}
.edu-card:hover { transform: translateX(4px); box-shadow: var(--shadow); }
.edu-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 0.1rem; }
.edu-degree { font-weight: 600; color: var(--text); font-size: 0.9rem; margin-bottom: 0.15rem; }
.edu-inst { color: var(--teal); font-size: 0.85rem; margin-bottom: 0.1rem; }
.edu-note { color: var(--text-muted); font-size: 0.78rem; }

.about-quote {
  padding: 1.4rem 1.6rem;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--teal) !important;
}
.about-quote p {
  font-family: 'DM Serif Display', serif;
  font-style: italic;
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ─────────────────────────────────────────
   RESEARCH
───────────────────────────────────────── */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.research-card {
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
  cursor: default;
}
.research-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--teal-glow), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
}
.research-card:hover {
  transform: translateY(-4px);
  border-color: rgba(45,212,191,0.3);
  box-shadow: 0 16px 40px rgba(0,0,0,0.3);
}
.research-card:hover::before { opacity: 1; }
.rc-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--teal);
  opacity: 0.5;
  margin-bottom: 0.8rem;
  letter-spacing: 0.1em;
}
.rc-icon { font-size: 2rem; margin-bottom: 0.8rem; }
.research-card h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 0.6rem;
  line-height: 1.3;
}
.research-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.2rem;
}
.rc-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.rc-tags span {
  font-size: 0.68rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(45,212,191,0.1);
  border: 1px solid rgba(45,212,191,0.2);
  color: var(--teal);
  font-family: 'JetBrains Mono', monospace;
}

/* ─────────────────────────────────────────
   TIMELINE / EXPERIENCE
───────────────────────────────────────── */
.timeline {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.timeline-spine {
  position: absolute;
  left: 17px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--teal), rgba(45,212,191,0.1));
}
.tl-item {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 1.5rem;
  align-items: start;
}
.tl-dot {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--ink-soft);
  border: 2px solid rgba(45,212,191,0.25);
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  margin-top: 0.8rem;
}
.tl-dot span {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
}
.tl-dot--active { border-color: var(--teal); }
.tl-dot--active span {
  background: var(--teal);
  box-shadow: 0 0 12px var(--teal);
}
.tl-card {
  border-radius: var(--radius-md);
  padding: 1.6rem 1.8rem;
  transition: transform 0.3s var(--ease);
}
.tl-card:hover { transform: translateX(4px); }
.tl-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.8rem;
}
.tl-period {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--teal);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.3rem;
}
.tl-card h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 1.15rem;
  color: var(--text);
  margin-bottom: 0.3rem;
  line-height: 1.3;
}
.tl-place {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.place-badge {
  font-size: 0.72rem;
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
}
.tl-card > p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0.8rem 0;
  line-height: 1.75;
}
.tl-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.8rem; }
.tl-tags span {
  font-size: 0.72rem;
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
}
.tl-badge {
  font-size: 0.7rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid;
  white-space: nowrap;
  flex-shrink: 0;
}
.tl-badge--current {
  border-color: rgba(45,212,191,0.4);
  color: var(--teal);
  background: rgba(45,212,191,0.08);
}

/* ─────────────────────────────────────────
   PUBLICATIONS
───────────────────────────────────────── */
.pub-filter-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  justify-content: center;
}
.pub-filter {
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.5rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}
.pub-filter:hover { background: var(--surface-2); color: var(--text); }
.pub-filter.active {
  background: rgba(45,212,191,0.15);
  border-color: rgba(45,212,191,0.4);
  color: var(--teal);
}

.pub-list { display: flex; flex-direction: column; gap: 1rem; max-width: 900px; margin: 0 auto; }
.pub-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.5rem;
  align-items: start;
  padding: 1.4rem 1.8rem;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--glass-border);
  transition: transform 0.25s var(--ease), border-color 0.25s, box-shadow 0.25s;
}
.pub-item:hover {
  transform: translateX(4px);
  border-color: rgba(45,212,191,0.25);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.pub-item.is-hidden { display: none; }
.pub-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
  min-width: 90px;
}
.pub-badge {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  border: 1px solid;
}
.pub-badge--journal { background: rgba(45,212,191,0.1); border-color: rgba(45,212,191,0.3); color: var(--teal); }
.pub-badge--conf { background: rgba(96,165,250,0.1); border-color: rgba(96,165,250,0.3); color: var(--blue); }
.pub-badge--chapter { background: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.3); color: var(--gold); }
.pub-year {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
}
.pub-body h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 0.3rem;
  line-height: 1.4;
}
.pub-venue {
  font-size: 0.8rem;
  color: var(--teal);
  margin-bottom: 0.4rem;
  opacity: 0.8;
}
.pub-abstract {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.65;
}
.pub-link {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--teal);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  background: rgba(45,212,191,0.07);
  border: 1px solid rgba(45,212,191,0.2);
  white-space: nowrap;
  transition: background 0.2s, transform 0.2s;
  align-self: flex-start;
  flex-shrink: 0;
}
.pub-link:hover { background: rgba(45,212,191,0.15); transform: translateY(-1px); }

/* ─────────────────────────────────────────
   TEACHING
───────────────────────────────────────── */
.teaching-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.teaching-col { display: flex; flex-direction: column; gap: 1.25rem; }
.teaching-card {
  border-radius: var(--radius-md);
  padding: 1.8rem;
}
.tc-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.tc-icon { font-size: 1.5rem; }
.tc-header h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 1.2rem;
  color: var(--text);
}
.course-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.course-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}
.course-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--teal);
  flex-shrink: 0;
  margin-top: 0.55rem;
}
.course-dot--gold { background: var(--gold); }
.course-list strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.1rem;
}
.course-list span {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.course-list div { display: flex; flex-direction: column; }

.teaching-highlight {
  border-radius: var(--radius-md);
  padding: 1.4rem 1.6rem;
  border-left: 3px solid var(--gold) !important;
}
.th-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.6rem;
}
.th-quote {
  font-family: 'DM Serif Display', serif;
  font-style: italic;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ─────────────────────────────────────────
   PROJECTS
───────────────────────────────────────── */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
}
.project-card:hover {
  transform: translateY(-5px);
  border-color: rgba(45,212,191,0.28);
  box-shadow: 0 20px 48px rgba(0,0,0,0.35);
}
.project-card--featured {
  background: linear-gradient(135deg, rgba(45,212,191,0.1), rgba(96,165,250,0.05));
  border-color: rgba(45,212,191,0.2);
}
.pc-accent {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--blue));
  opacity: 0;
  transition: opacity 0.3s;
}
.project-card:hover .pc-accent { opacity: 1; }
.project-card--featured .pc-accent { opacity: 1; background: linear-gradient(90deg, var(--teal), var(--gold)); }
.pc-icon { font-size: 2.2rem; margin-bottom: 0.8rem; }
.project-card h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 1.05rem;
  color: var(--text);
  margin-bottom: 0.6rem;
  line-height: 1.35;
}
.project-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.2rem;
}
.pc-stack { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.pc-stack span {
  font-size: 0.68rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

/* ─────────────────────────────────────────
   SKILLS
───────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}
.skill-group {
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.6rem;
}
.sg-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
}
.skill-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.skill-chips span {
  font-size: 0.8rem;
  padding: 0.38rem 0.85rem;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.skill-chips span:hover {
  background: rgba(45,212,191,0.1);
  color: var(--teal);
  border-color: rgba(45,212,191,0.25);
}

/* ─────────────────────────────────────────
   CONTACT
───────────────────────────────────────── */
.contact-section { overflow: hidden; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 5rem;
  align-items: start;
}
.contact-left .section-title { text-align: left; margin-bottom: 1.2rem; }
.contact-left .section-kicker { margin-bottom: 0.75rem; }
.contact-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}
.contact-channels { display: flex; flex-direction: column; gap: 1rem; }
.contact-channel {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.2rem;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--glass-border);
  transition: transform 0.25s var(--ease), border-color 0.25s, background 0.25s;
}
.contact-channel:hover {
  transform: translateX(4px);
  border-color: rgba(45,212,191,0.25);
  background: var(--surface-2);
}
.cc-icon { font-size: 1.4rem; flex-shrink: 0; }
.cc-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.15rem;
}
.cc-val {
  font-size: 0.88rem;
  color: var(--text);
  font-weight: 500;
}

.contact-form {
  border-radius: var(--radius-lg);
  padding: 2.2rem;
}
.contact-form h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 1.4rem;
  color: var(--text);
  margin-bottom: 1.6rem;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.form-field { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1rem; }
.form-field label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.form-field input,
.form-field textarea {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text);
  font-size: 0.9rem;
  transition: border-color 0.2s, background 0.2s;
  resize: none;
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--text-muted); opacity: 0.5; }
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: rgba(45,212,191,0.5);
  background: rgba(45,212,191,0.04);
}

/* ─────────────────────────────────────────
   FOOTER
───────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--glass-border);
  padding: 1.8rem 0;
  background: rgba(5,11,22,0.8);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.footer-left p {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.footer-right a {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-right a:hover { color: var(--teal); }
.back-top {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
}

/* ─────────────────────────────────────────
   ANIMATIONS
───────────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.fade-up--delay { transition-delay: 0.15s; }
.fade-up.is-visible { opacity: 1; transform: translateY(0); }

/* ─────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero-right { flex-direction: row; align-items: center; justify-content: center; flex-wrap: wrap; }
  .profile-shell { width: 250px; height: 300px; }
  .research-grid { grid-template-columns: repeat(2, 1fr); }
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 768px) {
  .site-nav {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: rgba(10,17,34,0.97);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1.5rem;
    gap: 0.25rem;
  }
  .site-nav.is-open { display: flex; }
  .nav-link { padding: 0.75rem 1rem; border-radius: var(--radius-sm); }
  .nav-cta { margin-left: 0; margin-top: 0.5rem; }
  .menu-toggle { display: flex; }
  
  .hero-section { padding: 5.5rem 0 3rem; }
  .hero-title { font-size: clamp(2.4rem, 8vw, 3.5rem); }
  .profile-shell { width: 220px; height: 270px; }
  .profile-tag { display: none; }
  .stat-strip { padding: 0.8rem 1rem; gap: 0.8rem; }
  .stat-num { font-size: 1.5rem; }
  
  .research-grid { grid-template-columns: 1fr; }
  .project-grid { grid-template-columns: 1fr; }
  .teaching-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  
  .pub-item { grid-template-columns: 1fr; gap: 0.8rem; }
  .pub-meta { flex-direction: row; align-items: center; }
  .pub-link { align-self: flex-start; }
  
  .timeline-spine { display: none; }
  .tl-item { grid-template-columns: 1fr; }
  .tl-dot { display: none; }
  
  .form-row { grid-template-columns: 1fr; }
  
  .section { padding: 4rem 0; }
  .scroll-indicator { display: none; }
}

@media (max-width: 480px) {
  .hero-badge { font-size: 0.65rem; }
  .hero-bio { font-size: 0.9rem; }
  .social-pill span { display: none; }
  .social-pill { padding: 0.5rem; border-radius: 10px; }
  .hero-socials { gap: 0.35rem; }
  .stat-strip { flex-wrap: wrap; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-right { justify-content: center; }
}