:root {
  --ink: #172033;
  --text: #334155;
  --muted: #64748b;
  --accent: #1675a9;
  --accent-dark: #105b85;
  --paper: #ffffff;
  --soft: #f5f8fb;
  --line: #dce5ec;
  --max: 1120px;
  --radius: 10px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body { margin: 0; font: 16px/1.7 Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--text); background: var(--paper); }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; }
img { max-width: 100%; }
.skip-link { position: absolute; left: -9999px; top: 0; background: white; padding: .7rem; z-index: 2000; }
.skip-link:focus { left: 1rem; }
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,.96); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.header-inner { max-width: var(--max); margin: auto; padding: .8rem 1.4rem; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: flex; align-items: center; gap: .75rem; color: var(--ink); text-decoration: none; min-width: 220px; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; background: var(--ink); color: white; font-weight: 700; font-size: .9rem; }
.brand-text strong { display: block; font-size: .96rem; line-height: 1.25; }
.brand-text small { display: block; color: var(--muted); font-size: .76rem; }
.main-nav { display: flex; align-items: center; gap: 1.15rem; flex-wrap: wrap; }
.main-nav a { color: var(--text); font-size: .91rem; font-weight: 500; padding: .35rem 0; border-bottom: 2px solid transparent; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--accent); border-color: var(--accent); text-decoration: none; }
main { min-height: 60vh; }
.container { max-width: var(--max); margin: auto; padding-left: 1.4rem; padding-right: 1.4rem; }
.hero { padding-top: 4.1rem; padding-bottom: 3.8rem; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(250px, .8fr); gap: 3.5rem; align-items: center; }
.eyebrow, .section-tag { margin: 0 0 .65rem; text-transform: uppercase; letter-spacing: .13em; font-size: .73rem; font-weight: 700; color: var(--accent); }
h1, h2, h3 { color: var(--ink); line-height: 1.25; }
h1 { font-size: clamp(2.4rem, 5vw, 3.55rem); letter-spacing: -.045em; margin: 0 0 .65rem; }
h2 { font-size: clamp(1.65rem, 3vw, 2.1rem); letter-spacing: -.025em; margin: 0 0 1rem; }
h3 { font-size: 1.12rem; margin: .3rem 0 .5rem; }
.role { color: var(--accent); font-size: 1.15rem; font-weight: 650; margin: 0 0 1rem; }
.lead { font-size: 1.06rem; max-width: 690px; margin: 0 0 1.3rem; }
.actions, .social-links { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem 1.25rem; }
.actions { margin: 1.4rem 0 1.3rem; }
.button { display: inline-block; border-radius: 6px; padding: .62rem 1rem; font-size: .92rem; font-weight: 650; border: 1px solid var(--ink); background: var(--ink); color: white; }
.button:hover { background: #29374f; color: white; text-decoration: none; }
.button.secondary { color: var(--ink); background: white; border-color: var(--line); }
.social-links a { font-size: .91rem; font-weight: 600; }
.profile-panel { background: var(--soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem; text-align: center; }
.profile-photo { width: 176px; height: 176px; object-fit: cover; object-position: center; border-radius: 50%; border: 4px solid white; box-shadow: 0 3px 15px #0f172a12; }
.profile-name { margin-top: 1rem; color: var(--ink); font-weight: 700; }
.profile-affiliation { color: var(--muted); font-size: .88rem; line-height: 1.5; margin-top: .2rem; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 2rem; }
.stat { border-top: 2px solid var(--line); padding: .8rem 0; }
.stat strong { display: block; color: var(--ink); font-size: 1rem; }
.stat span { display: block; font-size: .85rem; color: var(--muted); }
.section { padding: 3.7rem 0; }
.section.soft { background: var(--soft); border-top: 1px solid #edf1f5; border-bottom: 1px solid #edf1f5; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 1.5rem; margin-bottom: 1.7rem; }
.section-head p { max-width: 650px; color: var(--muted); margin: 0; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.card { padding: 1.35rem; background: white; border: 1px solid var(--line); border-radius: var(--radius); }
.card .number { color: var(--accent); font-size: .72rem; letter-spacing: .1em; font-weight: 750; }
.card p { margin: .45rem 0 0; font-size: .94rem; }
.project-list, .publication-list { display: grid; gap: .9rem; }
.project, .publication { padding: 1.1rem 1.25rem; border: 1px solid var(--line); border-radius: 8px; background: white; }
.project p, .publication p { margin: .3rem 0 0; }
.meta { color: var(--muted); font-size: .86rem; }
.page-intro { padding: 3.4rem 0 1.6rem; }
.page-intro h1 { font-size: clamp(2.1rem, 4vw, 3rem); }
.content-narrow { max-width: 850px; }
.prose p { margin: 0 0 1rem; }
.prose ul { padding-left: 1.25rem; }
.info-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
footer { border-top: 1px solid var(--line); padding: 1.5rem 0; color: var(--muted); font-size: .88rem; }
.footer-inner { max-width: var(--max); margin: auto; padding: 0 1.4rem; display: flex; justify-content: space-between; gap: 1rem; align-items: center; flex-wrap: wrap; }
.footer-inner strong { color: var(--ink); }
@media (max-width: 800px) {
  .header-inner { align-items: flex-start; flex-direction: column; gap: .55rem; }
  .main-nav { gap: .85rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
  .profile-panel { max-width: 430px; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .container { padding-left: 1rem; padding-right: 1rem; }
  .header-inner { padding: .75rem 1rem; }
  .brand { min-width: 0; }
  .brand-text strong { font-size: .9rem; }
  .main-nav { gap: .45rem .8rem; }
  .main-nav a { font-size: .85rem; }
  .hero { padding-top: 2.5rem; }
  .cards, .info-grid, .stats { grid-template-columns: 1fr; }
  .section { padding: 2.8rem 0; }
  .section-head { display: block; }
}