/* ===== FTSE 100 AI-Native Edition — Shared Styles ===== */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,500&family=Manrope:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --color-bg: #fbfbf9;
  --color-teal: #0f4c5c;
  --color-teal-dark: #0a3844;
  --color-gold: #c5a059;
  --color-gold-dark: #9c6215;
  --color-ink: #1c1c1c;
  --color-ink-secondary: #4a4a4a;
  --color-ink-muted: #737373;
  --color-slate: #cbd5e1;
  --color-slate-soft: #e2e7ee;
  --color-cream: #f5f3ed;
  --color-white: #ffffff;
  --color-accent: #5eaaa8;
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1200px;
  --border-radius: 0;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-teal); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-gold); }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { font-family: var(--font-serif); }
h1 { font-size: 3.2rem; line-height: 1.15; font-weight: 700; }
h2 { font-size: 2.4rem; line-height: 1.2; font-weight: 600; }
h3 { font-size: 1.5rem; font-weight: 600; }
.section { padding: 5rem 0; }
.section-dark { background: var(--color-teal); color: #fff; }
.section-cream { background: var(--color-cream); }
.eyebrow {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  display: block;
  margin-bottom: 0.5rem;
}
.section-title { margin-bottom: 0.75rem; }
.section-subtitle {
  color: var(--color-ink-muted);
  font-size: 1.1rem;
  max-width: 700px;
  margin-bottom: 2.5rem;
}
.text-center { text-align: center; }
.text-center .section-subtitle { margin-left: auto; margin-right: auto; }

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.7rem 1.75rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  border-radius: var(--border-radius);
  text-decoration: none;
}
.btn-gold {
  background: var(--color-gold);
  color: #fff;
  border-color: var(--color-gold);
}
.btn-gold:hover { background: var(--color-gold-dark); border-color: var(--color-gold-dark); color: #fff; }
.btn-teal {
  background: var(--color-teal);
  color: #fff;
  border-color: var(--color-teal);
}
.btn-teal:hover { background: var(--color-teal-dark); color: #fff; }
.btn-outline {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}
.btn-outline:hover { background: var(--color-ink); color: #fff; }
.btn-white {
  background: #fff;
  color: var(--color-teal-dark);
  border-color: #fff;
}
.btn-white:hover { background: var(--color-cream); }
.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.82rem; }

/* Utility */
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.flex-center { display: flex; align-items: center; justify-content: center; gap: 1rem; flex-wrap: wrap; }

/* Section sub-nav */
.section-subnav { display: flex; justify-content: center; gap: 0.25rem; flex-wrap: wrap; margin: 1.5rem 0 0.5rem; }
.section-subnav a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-ink-muted);
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-slate-soft);
  transition: all 0.2s;
}
.section-subnav a:hover { color: var(--color-teal); border-color: var(--color-teal); }

/* Navigation */
.site-nav {
  border-bottom: 1px solid var(--color-slate-soft);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-ink);
}
.nav-logo:hover { color: var(--color-teal); }
.nav-links { display: flex; align-items: center; gap: 0.25rem; }
.nav-links a {
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-ink-secondary);
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--color-teal); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-ink); margin: 4px 0; transition: 0.2s; }

/* Hero */
.hero {
  padding: 5rem 0 4rem;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-cream) 100%);
  border-bottom: 1px solid var(--color-slate-soft);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  align-items: center;
}
.hero h1 { margin-bottom: 1rem; }
.hero h1 .highlight { color: var(--color-teal); }
.hero p { font-size: 1.15rem; color: var(--color-ink-secondary); margin-bottom: 2rem; max-width: 600px; }
.hero .badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--color-teal);
  color: var(--color-gold);
  font-family: var(--font-serif);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3rem 0.8rem;
  margin-bottom: 1rem;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Researcher Card */
.researcher-card {
  background: #fff;
  border: 1px solid var(--color-slate-soft);
  padding: 2rem;
  text-align: center;
}
.researcher-card .avatar {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: var(--color-teal);
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 600;
}
.researcher-card h3 { margin-bottom: 0.25rem; }
.researcher-card .title { color: var(--color-ink-muted); font-size: 0.9rem; margin-bottom: 1rem; }
.researcher-card .institution { color: var(--color-teal); font-family: var(--font-serif); font-size: 1.1rem; font-style: italic; margin-bottom: 0.75rem; }
.researcher-card .stats { display: flex; justify-content: center; gap: 1.5rem; margin: 1.25rem 0; }
.researcher-card .stat { text-align: center; }
.researcher-card .stat-num { font-family: var(--font-serif); font-size: 1.6rem; font-weight: 700; color: var(--color-teal); }
.researcher-card .stat-label { font-size: 0.75rem; color: var(--color-ink-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.researcher-card .pubs { text-align: left; margin-top: 1rem; }
.researcher-card .pubs li { font-size: 0.82rem; color: var(--color-ink-secondary); padding: 0.4rem 0; border-bottom: 1px solid var(--color-slate-soft); }
.researcher-card .pubs li:last-child { border-bottom: none; }
.researcher-card .pubs .pub-title { font-weight: 500; color: var(--color-ink); }
.researcher-card .pubs .pub-cite { color: var(--color-gold-dark); font-family: var(--font-serif); font-size: 0.78rem; }

/* Card Grid */
.card-grid { display: grid; gap: 1.5rem; }
.card-grid-2 { grid-template-columns: 1fr 1fr; }
.card-grid-3 { grid-template-columns: 1fr 1fr 1fr; }
.card {
  background: #fff;
  border: 1px solid var(--color-slate-soft);
  padding: 2rem;
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(0,0,0,0.06); }
.card-icon { font-size: 1.8rem; margin-bottom: 0.75rem; }
.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--color-ink-secondary); font-size: 0.92rem; line-height: 1.6; }
.card-dark { background: var(--color-teal); border-color: var(--color-teal-dark); color: #fff; }
.card-dark h3 { color: var(--color-gold); }
.card-dark p { color: rgba(255,255,255,0.85); }

/* Timeline */
.timeline { position: relative; max-width: 800px; margin: 0 auto; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-gold);
}
.timeline-item { position: relative; padding: 0 0 2rem 2rem; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-bg);
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item h4 { font-size: 1.2rem; margin-bottom: 0.25rem; }
.timeline-item .meta { font-size: 0.82rem; color: var(--color-ink-muted); margin-bottom: 0.5rem; }
.timeline-item p { font-size: 0.92rem; color: var(--color-ink-secondary); }

/* Stats row */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.stat-card { text-align: center; padding: 1.5rem; }
.stat-card .num { font-family: var(--font-serif); font-size: 2.8rem; font-weight: 700; color: var(--color-teal); line-height: 1; }
.stat-card .label { font-size: 0.85rem; color: var(--color-ink-muted); margin-top: 0.4rem; }
.section-dark .stat-card .num { color: var(--color-gold); }
.section-dark .stat-card .label { color: rgba(255,255,255,0.75); }

/* Two-col */
.cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }

/* Phase cards */
.phase-card { background: #fff; border: 1px solid var(--color-slate-soft); padding: 1.5rem; margin-bottom: 1rem; }
.phase-card .phase-label { font-family: var(--font-serif); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-gold); margin-bottom: 0.25rem; }
.phase-card h4 { margin-bottom: 0.25rem; }
.phase-card p { font-size: 0.9rem; color: var(--color-ink-secondary); }

/* Budget table */
.budget-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
.budget-table td { padding: 0.75rem 0; border-bottom: 1px solid var(--color-slate-soft); font-size: 0.9rem; }
.budget-table td:last-child { text-align: right; font-weight: 600; }
.budget-table tr:last-child td { border-bottom: none; font-weight: 700; font-size: 1rem; }
.budget-table tr:last-child td:last-child { color: var(--color-teal); font-family: var(--font-serif); font-size: 1.1rem; }

/* Footer */
.site-footer {
  background: var(--color-teal-dark);
  color: rgba(255,255,255,0.8);
  padding: 3rem 0 1.5rem;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; margin-bottom: 2rem; }
.footer-logo { font-family: var(--font-serif); font-size: 1.2rem; font-weight: 700; color: #fff; display: block; margin-bottom: 0.75rem; }
.footer-brand p { font-size: 0.85rem; line-height: 1.6; }
.footer-col h4 { font-family: var(--font-sans); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-gold); margin-bottom: 0.75rem; }
.footer-col a { display: block; font-size: 0.85rem; color: rgba(255,255,255,0.7); padding: 0.25rem 0; }
.footer-col a:hover { color: var(--color-gold); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 1.5rem; font-size: 0.8rem; text-align: center; color: rgba(255,255,255,0.5); }

/* Responsive */
@media (max-width: 900px) {
  h1 { font-size: 2.4rem; }
  h2 { font-size: 1.8rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero { padding: 3rem 0 2.5rem; }
  .cols-2 { grid-template-columns: 1fr; gap: 2rem; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .card-grid-3 { grid-template-columns: 1fr; }
  .card-grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--color-bg); border-bottom: 1px solid var(--color-slate-soft); padding: 1rem; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .researcher-card .stats { flex-wrap: wrap; gap: 1rem; }
  .researcher-card .pubs li { font-size: 0.78rem; }
}