body { overflow-x: hidden; }

/* Scroll-reveal nav border */
nav { border-bottom: 1px solid transparent; box-shadow: none; transition: all 0.3s; }
nav.scrolled { border-bottom-color: var(--border); box-shadow: 0 1px 8px rgba(0,0,0,0.04); }

/* Footer gets a subtle separator from the contact section above */
footer { border-top: 1px solid rgba(255,255,255,0.06); }

/* ─── HERO ─── */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding: 7rem 2rem 4rem; position: relative;
}
.hero::before {
  content: '';
  position: absolute; top: 0; right: 0; bottom: 0; left: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(37,99,235,0.04) 0%, transparent 100%),
    radial-gradient(ellipse 40% 40% at 10% 80%, rgba(220,104,67,0.03) 0%, transparent 100%);
  pointer-events: none;
}
.hero-inner {
  max-width: 1100px; margin: 0 auto; width: 100%;
  display: grid; grid-template-columns: 1fr 280px; gap: 4rem;
  align-items: center; position: relative; z-index: 1;
}
.hero-chips { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.chip {
  font-family: var(--font-heading); font-size: 0.7rem; font-weight: 500;
  padding: 0.3rem 0.7rem; border-radius: 100px;
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
}
.chip.highlight { background: var(--accent-soft); border-color: var(--accent-soft); color: var(--accent-dark); }
h1 {
  font-family: var(--font-heading); font-size: 2.8rem;
  font-weight: 700; line-height: 1.1; letter-spacing: -0.03em; margin-bottom: 1.3rem;
}
h1 span { color: var(--accent); }
.hero-text > p {
  font-size: 1.05rem; color: var(--muted); max-width: 540px;
  margin-bottom: 2rem; line-height: 1.75; font-weight: 300;
}
.hero-links { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.hero-links a {
  font-family: var(--font-heading); font-size: 0.8rem; font-weight: 500;
  padding: 0.55rem 1.2rem; border-radius: 6px; text-decoration: none; transition: all 0.2s;
}
.hero-links a.primary { background: var(--ink); color: white; }
.hero-links a.primary:hover { background: var(--accent); }
.hero-links a.secondary { border: 1px solid var(--border); color: var(--ink); }
.hero-links a.secondary:hover { border-color: var(--ink); }
.portrait-wrap img { width: 100%; aspect-ratio: 3/4; object-fit: cover; border-radius: 12px; }

/* ─── SECTIONS ─── */
section { padding: 5rem 2rem; }
.container { max-width: 1100px; margin: 0 auto; }
.section-label {
  font-family: var(--font-heading); font-size: 0.72rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent); margin-bottom: 0.6rem;
}
h2 {
  font-family: var(--font-heading); font-size: 1.9rem;
  font-weight: 700; line-height: 1.2; margin-bottom: 1rem; letter-spacing: -0.02em;
}
.section-intro { font-size: 1rem; color: var(--muted); max-width: 600px; line-height: 1.7; font-weight: 300; margin-bottom: 2rem; }

/* ─── STATS BAR ─── */
.stats-bar {
  display: grid; grid-template-columns: repeat(6, 1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; margin: 3rem auto; max-width: 1100px;
}
.stat { background: var(--paper); padding: 1.6rem 1.2rem; text-align: center; }
.stat-number { font-family: var(--font-heading); font-size: 2rem; font-weight: 700; color: var(--ink); line-height: 1; margin-bottom: 0.3rem; }
.stat-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--light); font-weight: 500; }

/* ─── VISION ─── */
.vision {
  border-left: 3px solid var(--accent); padding: 1.8rem 2rem;
  background: var(--surface); border-radius: 0 10px 10px 0; margin-top: 0.5rem;
}
.vision p { font-size: 1.02rem; line-height: 1.8; color: var(--ink); font-weight: 300; max-width: 780px; }
.vision strong { font-weight: 600; }

/* ─── KEY CONTRIBUTIONS ─── */
.contributions { background: var(--surface); }
.contrib-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-top: 1.5rem; }
.contrib {
  display: block; text-decoration: none; color: inherit;
  background: var(--paper); border: 1px solid var(--border); border-radius: 10px;
  padding: 1.5rem 1.6rem; transition: all 0.25s;
}
.contrib:hover { border-color: var(--accent); box-shadow: 0 4px 20px rgba(37,99,235,0.06); }
.contrib h3 { font-family: var(--font-heading); font-size: 0.95rem; font-weight: 600; margin-bottom: 0.5rem; line-height: 1.3; }
.contrib p { font-size: 0.86rem; color: var(--muted); line-height: 1.6; font-weight: 300; }

/* ─── RESEARCH STRANDS ─── */
.research-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-top: 2rem; }
.strand { border: 1px solid var(--border); border-radius: 10px; padding: 1.8rem 1.5rem; transition: all 0.25s; background: var(--paper); }
.strand:hover { border-color: var(--accent); box-shadow: 0 4px 20px rgba(37,99,235,0.06); transform: translateY(-2px); }
.strand-number { font-family: var(--font-mono); font-size: 0.68rem; color: var(--accent); margin-bottom: 0.8rem; }
.strand h3 { font-family: var(--font-heading); font-size: 1.05rem; font-weight: 600; margin-bottom: 0.6rem; line-height: 1.3; }
.strand p { font-size: 0.86rem; color: var(--muted); line-height: 1.6; font-weight: 300; }

/* ─── GROUP ─── */
.group-section { background: var(--surface); }
.group-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 2.5rem; margin-top: 1.5rem; align-items: start; }
.group-text p { font-size: 0.92rem; color: var(--muted); line-height: 1.75; font-weight: 300; }
.group-text strong { color: var(--ink); font-weight: 500; }
.group-members { display: flex; flex-direction: column; gap: 0.5rem; }
.member {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.75rem 1.1rem; border: 1px solid var(--border); border-radius: 8px; background: var(--paper);
}
.member-name { font-family: var(--font-heading); font-size: 0.88rem; font-weight: 500; }
.member-role { font-size: 0.75rem; color: var(--light); }
.member-link { display: flex; justify-content: space-between; align-items: center; width: 100%; text-decoration: none; color: inherit; }
.member-link:hover .member-name { color: var(--accent); }
.edi-block { border-top: 1px solid var(--border); padding-top: 0.5rem; }
.edi-heading { font-family: var(--font-heading); font-size: 1.2rem; font-weight: 600; margin-bottom: 0.8rem; line-height: 1.3; }
.edi-text { font-size: 0.92rem; color: var(--muted); line-height: 1.75; font-weight: 300; max-width: 780px; }
.edi-text strong { color: var(--ink); font-weight: 500; }
.edi-text em { font-style: italic; }

/* ─── COMMUNITY & LEADERSHIP ─── */
.leadership-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 1.5rem; }
.lead-item {
  display: flex; gap: 1rem; align-items: start;
  padding: 1.2rem 1.4rem; border: 1px solid var(--border); border-radius: 10px; background: var(--paper);
}
.lead-item h3 { font-family: var(--font-heading); font-size: 0.9rem; font-weight: 600; margin-bottom: 0.3rem; line-height: 1.3; }
.lead-item p { font-size: 0.84rem; color: var(--muted); line-height: 1.55; font-weight: 300; }

/* ─── MEDIA ─── */
.media-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.8rem; margin-top: 1.5rem; }
.media-item {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.3rem; border: 1px solid var(--border); border-radius: 10px;
  text-decoration: none; color: var(--ink); transition: all 0.2s;
}
.media-item:hover { border-color: var(--accent); box-shadow: 0 2px 12px rgba(37,99,235,0.06); }
.media-outlet {
  font-family: var(--font-heading); font-size: 0.68rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent);
  white-space: nowrap; min-width: 95px;
}
.media-desc { font-size: 0.86rem; color: var(--muted); line-height: 1.4; font-weight: 300; }
.media-year { font-family: var(--font-mono); font-size: 0.7rem; color: var(--light); margin-left: auto; white-space: nowrap; }

/* ─── SELECTED PUBLICATIONS ─── */
.pubs-section { background: var(--surface); }
.pub-list { margin-top: 1.5rem; }
.pub { padding: 1.1rem 0; border-bottom: 1px solid var(--border); }
.pub:last-child { border-bottom: none; }
.pub-title { font-family: var(--font-heading); font-size: 0.95rem; font-weight: 500; margin-bottom: 0.25rem; }
.pub-title a { color: var(--ink); text-decoration: none; transition: color 0.2s; }
.pub-title a:hover { color: var(--accent); }
.pub-meta { font-size: 0.8rem; color: var(--muted); font-weight: 300; }
.pub-tag {
  display: inline-block; font-family: var(--font-heading); font-size: 0.62rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  padding: 0.15rem 0.5rem; border-radius: 4px;
  background: var(--accent-soft); color: var(--accent-dark);
  margin-right: 0.4rem; vertical-align: middle;
}
.pub-more {
  display: inline-block; margin-top: 1.5rem;
  font-family: var(--font-heading); font-size: 0.82rem; font-weight: 500;
  color: var(--accent); text-decoration: none; transition: all 0.2s;
}
.pub-more:hover { color: var(--accent-dark); }
.pub-more::after { content: ' \2192'; }

/* ─── CONTACT ─── */
.contact-section { background: var(--ink); color: white; padding: 4rem 2rem; }
.contact-section h2 { color: white; }
.contact-section .section-label { color: var(--warm); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-top: 1.5rem; }
.contact-text { font-size: 0.95rem; color: rgba(255,255,255,0.6); line-height: 1.75; font-weight: 300; }
.contact-text strong { color: white; font-weight: 500; }
.contact-links { display: flex; flex-direction: column; gap: 0.6rem; }
.contact-links a {
  display: flex; align-items: center; gap: 0.8rem;
  font-size: 0.88rem; color: rgba(255,255,255,0.6);
  text-decoration: none; transition: color 0.2s; font-weight: 300;
}
.contact-links a:hover { color: white; }
.contact-links .link-label {
  font-family: var(--font-heading); font-size: 0.66rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em; color: rgba(255,255,255,0.25);
  width: 75px; flex-shrink: 0;
}

/* ─── ANIMATIONS ─── */
.fade-in { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2rem; }
  .portrait-wrap { max-width: 220px; order: -1; }
  h1 { font-size: 2.1rem; }
  .research-grid, .contrib-grid { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(3, 1fr); }
  .media-grid, .contact-grid, .group-grid, .leadership-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  html { font-size: 15px; }
  section { padding: 3.5rem 1.2rem; }
  .hero { padding: 5rem 1.2rem 3rem; }
  h1 { font-size: 1.8rem; }
}