@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,600;0,700;1,400;1,600&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&display=swap');

/* =====================
   CSS VARIABLES
   ===================== */
:root {
  --navy:        #060c18;
  --navy-mid:    #0d1b2a;
  --navy-light:  #1a3048;
  --teal:        #0d6e6e;
  --teal-light:  #1a9090;
  --teal-glow:   rgba(13,110,110,0.15);
  --gold:        #b8860b;
  --gold-light:  #d4a820;
  --cream:       #f7f4ef;
  --cream-dark:  #ede8e0;
  --white:       #ffffff;
  --text-primary:   #0f1923;
  --text-secondary: #4a5568;
  --text-muted:     #718096;
  --border:         rgba(0,0,0,0.09);
  --border-light:   rgba(0,0,0,0.06);

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;

  --max-width: 1080px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: all 0.35s var(--ease);
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.07);
  --shadow:     0 4px 24px rgba(0,0,0,0.11);
  --shadow-lg:  0 12px 48px rgba(0,0,0,0.17);
}

/* =====================
   RESET & BASE
   ===================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--text-primary);
  background: var(--cream);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--teal); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--teal-light); }

/* =====================
   NAVIGATION
   ===================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: 64px;
  padding: 0 2.5rem;
  display: flex; align-items: center; justify-content: space-between;
  background: transparent;
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(6, 12, 24, 0.96);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

.nav-brand {
  font-size: 1.2rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.03em;
}

.nav-links { display: flex; gap: 2rem; list-style: none; }

.nav-links a {
  color: rgba(255,255,255,0.6);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute; bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--teal-light);
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active { color: #fff; }

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

/* =====================
   HERO (index only)
   ===================== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  background: var(--navy);
}

.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 15% 60%, rgba(13,110,110,0.28) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 20%, rgba(184,134,11,0.12) 0%, transparent 45%),
    linear-gradient(155deg, #060c18 0%, #0d1b2a 55%, #081420 100%);
}

.hero-grain {
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-wave {
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 160px; opacity: 0.12; pointer-events: none;
}

.hero-content {
  position: relative; z-index: 2;
  text-align: center; padding: 2rem;
  max-width: 820px;
}

.hero-eyebrow {
  font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--teal-light); margin-bottom: 1.5rem;
  opacity: 0; animation: fadeUp 0.9s var(--ease) 0.15s forwards;
}

.hero-name {
  font-size: clamp(3.5rem, 9vw, 7rem);
  font-weight: 700; color: #fff;
  line-height: 0.95; letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
  opacity: 0; animation: fadeUp 0.9s var(--ease) 0.35s forwards;
}

.hero-name span { color: var(--teal-light); }

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.55rem);
  font-weight: 400;
  color: rgba(255,255,255,0.55);
  margin-bottom: 0.6rem;
  opacity: 0; animation: fadeUp 0.9s var(--ease) 0.55s forwards;
}

.hero-affil {
  font-size: 0.82rem; letter-spacing: 0.06em;
  color: rgba(255,255,255,0.35);
  margin-bottom: 2.75rem;
  opacity: 0; animation: fadeUp 0.9s var(--ease) 0.65s forwards;
}

.hero-links {
  display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap;
  opacity: 0; animation: fadeUp 0.9s var(--ease) 0.85s forwards;
}

.hero-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 2px;
  color: rgba(255,255,255,0.65);
  font-size: 0.75rem; letter-spacing: 0.06em;
  background: rgba(255,255,255,0.03);
  transition: var(--transition);
}

.hero-link:hover {
  border-color: var(--teal-light);
  color: var(--teal-light);
  background: rgba(13,110,110,0.1);
  transform: translateY(-2px);
}

.hero-scroll {
  position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  color: rgba(255,255,255,0.3);
  font-size: 0.65rem; letter-spacing: 0.2em; text-transform: uppercase;
  animation: float 3s ease-in-out infinite 2s;
}

.hero-scroll-line {
  width: 1px; height: 36px;
  background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.3));
}

/* =====================
   PAGE HEADER (non-hero pages)
   ===================== */
.page-header {
  background: var(--navy-mid);
  padding: 7.5rem 2rem 4rem;
  text-align: center; position: relative; overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 25% 50%, rgba(13,110,110,0.18) 0%, transparent 65%);
}

.page-header-inner { position: relative; z-index: 1; }

.page-header h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 700; color: #fff;
  margin-bottom: 0.5rem;
}

.page-header p {
  font-size: 1.15rem; font-style: italic;
  color: rgba(255,255,255,0.4);
}

/* =====================
   LAYOUT
   ===================== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; }

section { padding: 5.5rem 0; }
section.alt { background: var(--white); }

.section-label {
  font-size: 0.68rem; font-weight: 500; letter-spacing: 0.28em;
  text-transform: uppercase; color: var(--teal); margin-bottom: 0.6rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700; color: var(--text-primary);
  line-height: 1.1; margin-bottom: 3rem;
}

.section-title em { font-style: italic; color: var(--teal); }

/* =====================
   ABOUT (index)
   ===================== */
.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 5rem; align-items: start;
}

.about-photo {
  width: 100%; aspect-ratio: 3/4;
  object-fit: cover; border-radius: 2px;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.about-photo-placeholder {
  width: 100%; aspect-ratio: 3/4;
  background: linear-gradient(160deg, var(--navy-light), var(--navy-mid));
  border-radius: 2px; margin-bottom: 1.5rem;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 0.5rem;
  color: rgba(255,255,255,0.18);
  font-size: 0.78rem; letter-spacing: 0.1em;
  position: relative; overflow: hidden;
}

.about-photo-placeholder::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 30%, rgba(13,110,110,0.25), transparent 60%);
}

.sidebar-links { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }

.sidebar-links li {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 0.82rem; color: var(--text-secondary);
}

.sidebar-links a { color: var(--text-secondary); font-size: 0.82rem; }
.sidebar-links a:hover { color: var(--teal); }

.sidebar-icon { width: 15px; color: var(--teal); flex-shrink: 0; }

.about-body p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.02rem; line-height: 1.85;
}

.about-body p:first-child { font-size: 1.12rem; }

h3.sub-heading {
  font-size: 1.35rem; font-weight: 600;
  color: var(--text-primary); margin: 2.5rem 0 1rem;
}

.interests-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem;
  margin-top: 1rem;
}

.interest-card {
  padding: 1rem 1.1rem;
  background: var(--cream);
  border-left: 3px solid var(--teal);
  font-size: 0.88rem; color: var(--text-secondary); line-height: 1.5;
}

/* =====================
   TIMELINE
   ===================== */
.timeline { position: relative; padding-left: 2.25rem; }

.timeline::before {
  content: '';
  position: absolute; left: 0; top: 10px; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--teal) 70%, transparent);
}

.timeline-item { position: relative; padding-bottom: 2.25rem; }

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.625rem; top: 6px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--teal);
  border: 2px solid var(--cream);
  box-shadow: 0 0 0 1px var(--teal);
}

.timeline-date {
  font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--teal); margin-bottom: 0.2rem;
}

.timeline-title {
  font-size: 1.15rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 0.15rem;
}

.timeline-sub {
  font-size: 0.87rem; color: var(--text-muted);
  font-style: italic; margin-bottom: 0.4rem;
}

.timeline-body {
  font-size: 0.87rem; color: var(--text-secondary); line-height: 1.7;
}

/* =====================
   PUBLICATION CARDS
   ===================== */
.pub-list { display: flex; flex-direction: column; gap: 1.25rem; }

.pub-card {
  padding: 1.75rem 2rem;
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: 2px;
  position: relative; overflow: hidden;
  transition: var(--transition);
}

.pub-card::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--teal);
  transform: scaleY(0); transform-origin: bottom;
  transition: var(--transition);
}

.pub-card:hover { box-shadow: var(--shadow); transform: translateX(5px); }
.pub-card:hover::before { transform: scaleY(1); }

.pub-year {
  font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.18em; color: var(--teal); text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.pub-journal {
  font-size: 0.78rem; color: var(--text-muted);
  font-style: italic; margin-bottom: 0.4rem;
}

.pub-badge {
  display: inline-block;
  font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.06em;
  padding: 0.1rem 0.5rem;
  background: rgba(184,134,11,0.12);
  color: var(--gold);
  border-radius: 2px; margin-bottom: 0.6rem;
}

.pub-title {
  font-size: 1.15rem; font-weight: 600;
  color: var(--text-primary); line-height: 1.3;
  margin-bottom: 0.5rem;
}

.pub-authors {
  font-size: 0.83rem; color: var(--text-secondary);
  margin-bottom: 0.75rem; line-height: 1.55;
}

.pub-authors strong { font-weight: 600; color: var(--text-primary); }

.pub-doi {
  display: inline-flex; align-items: center; gap: 0.3rem;
  font-size: 0.77rem; color: var(--teal);
}

.pub-doi:hover { color: var(--teal-light); }

/* =====================
   TALKS
   ===================== */
.talks-list { display: flex; flex-direction: column; }

.talk-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-light);
  align-items: start;
}

.talk-date {
  font-size: 0.72rem; font-weight: 500; color: var(--teal);
  letter-spacing: 0.06em; padding-top: 0.3rem;
  white-space: nowrap;
}

.talk-title {
  font-size: 1.05rem; font-weight: 600;
  color: var(--text-primary); line-height: 1.3;
  margin-bottom: 0.2rem;
}

.talk-venue {
  font-size: 0.8rem; color: var(--text-muted);
  font-style: italic; margin-bottom: 0.25rem;
}

.talk-authors { font-size: 0.8rem; color: var(--text-secondary); }
.talk-authors strong { font-weight: 600; color: var(--text-primary); }

.talk-type {
  display: inline-block;
  font-size: 0.66rem; font-weight: 500;
  letter-spacing: 0.09em; text-transform: uppercase;
  padding: 0.12rem 0.45rem; border-radius: 2px; margin-top: 0.35rem;
}

.talk-type.oral   { background: rgba(13,110,110,0.1); color: var(--teal); }
.talk-type.poster { background: rgba(184,134,11,0.1); color: var(--gold); }

/* =====================
   TEACHING
   ===================== */
.teaching-list { display: flex; flex-direction: column; }

.teaching-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 1.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border-light);
}

.teaching-date { font-size: 0.77rem; color: var(--text-muted); padding-top: 0.2rem; }

.teaching-role {
  font-size: 1.05rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 0.1rem;
}

.teaching-place { font-size: 0.82rem; color: var(--teal); font-style: italic; margin-bottom: 0.25rem; }
.teaching-desc  { font-size: 0.84rem; color: var(--text-secondary); line-height: 1.65; }

/* =====================
   AWARDS GRID
   ===================== */
.awards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1rem;
}

.award-card {
  padding: 1.25rem 1.4rem;
  background: var(--cream);
  border-top: 2px solid var(--gold);
  border-radius: 0 0 2px 2px;
}

.award-year {
  font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.18em; color: var(--gold); text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.award-name {
  font-size: 1rem; font-weight: 600;
  color: var(--text-primary); line-height: 1.3;
  margin-bottom: 0.15rem;
}

.award-org { font-size: 0.78rem; color: var(--text-muted); font-style: italic; }

/* =====================
   RESEARCH CARDS
   ===================== */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.research-card {
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: 2px;
  overflow: hidden;
  transition: var(--transition);
}

.research-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }

.research-card-img {
  height: 180px;
  background: linear-gradient(160deg, var(--navy-light), var(--navy-mid));
  position: relative; overflow: hidden;
  display: flex; align-items: flex-end;
}

.research-card-img-label {
  position: relative; z-index: 1;
  padding: 0.75rem 1rem;
  font-size: 1.3rem; font-weight: 600;
  color: rgba(255,255,255,0.25);
  font-style: italic;
}

.research-card-img.theme-1 { background: linear-gradient(145deg, #0a1f3a 0%, #0d3d4d 100%); }
.research-card-img.theme-1::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 70%, rgba(13,110,110,0.4), transparent 55%);
}

.research-card-img.theme-2 { background: linear-gradient(145deg, #1a0a2e 0%, #0d1b2a 100%); }
.research-card-img.theme-2::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 70% 30%, rgba(184,134,11,0.25), transparent 55%);
}

.research-card-img.theme-3 { background: linear-gradient(145deg, #0a2818 0%, #0a1a2e 100%); }
.research-card-img.theme-3::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 60%, rgba(26,90,90,0.5), transparent 55%);
}

.research-card-body { padding: 1.5rem; }

.research-card-title {
  font-size: 1.15rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 0.6rem; line-height: 1.3;
}

.research-card-body p {
  font-size: 0.87rem; color: var(--text-secondary); line-height: 1.7;
}

/* =====================
   CONTACT PAGE
   ===================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; }

.contact-item { display: flex; gap: 1rem; margin-bottom: 1.75rem; align-items: flex-start; }

.contact-item-icon {
  width: 38px; height: 38px; flex-shrink: 0;
  background: var(--teal-glow); border-radius: 2px;
  display: flex; align-items: center; justify-content: center;
  color: var(--teal);
}

.contact-item-text h3 { font-size: 1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 0.1rem; }
.contact-item-text p,
.contact-item-text a  { font-size: 0.87rem; color: var(--text-secondary); }
.contact-item-text a:hover { color: var(--teal); }

/* =====================
   FOOTER
   ===================== */
.footer { background: var(--navy); padding: 3rem 2rem 2rem; text-align: center; }

.footer-inner { max-width: var(--max-width); margin: 0 auto; }

.footer-name {
  font-size: 1.5rem; font-weight: 600; color: #fff; margin-bottom: 0.4rem;
}

.footer-title {
  font-size: 0.95rem; font-style: italic;
  color: rgba(255,255,255,0.3); margin-bottom: 1.25rem;
}

.footer-nav {
  display: flex; gap: 1.75rem; justify-content: center;
  flex-wrap: wrap; margin-bottom: 1.75rem;
}

.footer-nav a {
  font-size: 0.75rem; color: rgba(255,255,255,0.4);
  text-transform: uppercase; letter-spacing: 0.1em;
}

.footer-nav a:hover { color: rgba(255,255,255,0.8); }

.footer-widgets {
  display: flex; justify-content: center; align-items: center;
  gap: 2.5rem; flex-wrap: wrap; margin-bottom: 1.5rem; min-height: 48px;
}

.footer-copy { font-size: 0.72rem; color: rgba(255,255,255,0.2); }

/* =====================
   DIVIDER
   ===================== */
.wave-divider { height: 2px; background: linear-gradient(to right, transparent, var(--teal-glow), transparent); margin: 0; }

/* =====================
   ANIMATIONS
   ===================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(10px); }
}

.fade-in {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

.fade-in.visible { opacity: 1; transform: translateY(0); }

.fade-in:nth-child(2) { transition-delay: 0.08s; }
.fade-in:nth-child(3) { transition-delay: 0.16s; }
.fade-in:nth-child(4) { transition-delay: 0.24s; }
.fade-in:nth-child(5) { transition-delay: 0.32s; }
.fade-in:nth-child(6) { transition-delay: 0.40s; }

/* =====================
   RESPONSIVE
   ===================== */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-photo, .about-photo-placeholder { max-width: 240px; }
}

/* =====================
   HAMBURGER MENU
   ===================== */
.nav-toggle {
  display: none;
  flex-direction: column; justify-content: center; align-items: center;
  gap: 5px; width: 36px; height: 36px;
  background: none; border: none; cursor: pointer;
  padding: 4px; z-index: 1001;
}

.nav-toggle span {
  display: block; width: 22px; height: 1.5px;
  background: rgba(255,255,255,0.7);
  transition: var(--transition);
  transform-origin: center;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

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

  .nav-links {
    display: flex;
    flex-direction: column;
    position: fixed; top: 64px; left: 0; right: 0;
    background: rgba(6,12,24,0.98);
    backdrop-filter: blur(16px);
    padding: 1rem 0 1.5rem;
    gap: 0;
    list-style: none;
    transform: translateY(-110%);
    opacity: 0;
    transition: transform 0.35s var(--ease), opacity 0.35s var(--ease);
    pointer-events: none;
    border-bottom: 1px solid rgba(255,255,255,0.07);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links li { width: 100%; }

  .nav-links a {
    display: block;
    padding: 0.85rem 2rem;
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }

  .nav-links a::after { display: none; }
  .nav-links a:hover,
  .nav-links a.active { background: rgba(255,255,255,0.04); color: #fff; }


  section { padding: 3.5rem 0; }
  .container { padding: 0 1.25rem; }
  .talk-item { grid-template-columns: 58px 1fr; gap: 1rem; }
  .teaching-item { grid-template-columns: 1fr; gap: 0.2rem; }
  .teaching-date { color: var(--teal); font-size: 0.72rem; }
  .awards-grid { grid-template-columns: 1fr; }
}