:root {
  --ink: #101a33;
  --ink-soft: #39445e;
  --paper: #f5f7fb;
  --white: #ffffff;
  --blue: #3154d4;
  --blue-dark: #243ca2;
  --sun: #f2b84b;
  --line: #d7ddeb;
  --max: 1180px;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 1rem; line-height: 1.65; }
a { color: inherit; }
.skip-link { position: fixed; left: 1rem; top: -4rem; z-index: 50; padding: .7rem 1rem; background: var(--white); border: 2px solid var(--blue); }
.skip-link:focus { top: 1rem; }
.site-header { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(14px); border-bottom: 1px solid rgba(16,26,51,.1); }
.nav-wrap { max-width: var(--max); min-height: 76px; margin: 0 auto; padding: 0 2rem; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.wordmark { display: inline-flex; align-items: center; gap: .8rem; text-decoration: none; font-weight: 700; }
.mark { width: 38px; height: 38px; display: grid; place-items: center; background: var(--ink); color: var(--white); font-family: var(--serif); font-size: .88rem; }
.site-nav { display: flex; align-items: center; gap: 1.5rem; }
.site-nav a { text-decoration: none; font-size: .91rem; font-weight: 650; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--blue); }
.site-nav .nav-contact { padding: .45rem .8rem; border: 1px solid var(--ink); }
.menu-button { display: none; border: 1px solid var(--ink); background: transparent; color: var(--ink); padding: .5rem .7rem; font: inherit; font-weight: 650; }

.hero { min-height: calc(100vh - 76px); display: grid; align-items: center; padding: 5.5rem 2rem; position: relative; overflow: hidden; }
.hero::after { content: ''; position: absolute; width: 390px; height: 390px; border: 1px solid rgba(49,84,212,.22); border-radius: 50%; right: -150px; top: 50px; box-shadow: 0 0 0 70px rgba(49,84,212,.035), 0 0 0 140px rgba(49,84,212,.025); pointer-events: none; }
.hero-grid, .section-grid, .contact-inner { width: 100%; max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: minmax(0,1.55fr) minmax(300px,.65fr); gap: clamp(3rem, 8vw, 8rem); align-items: center; }
.eyebrow, .section-kicker, .status, .level, .paper-meta, .timeline-date { margin: 0 0 1.2rem; color: var(--blue); font-size: .78rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: var(--serif); font-weight: 400; letter-spacing: -.035em; }
h1 { max-width: 850px; margin-bottom: 1.7rem; font-size: clamp(3.2rem, 6.7vw, 6.6rem); line-height: .96; }
h1 em { color: var(--blue); font-weight: 400; }
.hero-intro { max-width: 730px; color: var(--ink-soft); font-size: clamp(1.08rem, 1.7vw, 1.3rem); line-height: 1.65; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2.2rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: .72rem 1.1rem; border: 1px solid var(--ink); text-decoration: none; font-weight: 750; }
.button-primary { background: var(--ink); color: var(--white); }
.button-primary:hover { background: var(--blue); border-color: var(--blue); }
.button-secondary:hover { background: var(--white); }
.profile-card { position: relative; padding: 1.7rem; background: var(--white); border: 1px solid var(--line); box-shadow: 18px 18px 0 rgba(49,84,212,.09); }
.signal { height: 72px; display: flex; align-items: end; gap: 7px; margin: 0 0 1.4rem; padding-bottom: .7rem; border-bottom: 1px solid var(--line); }
.signal span { width: 9px; background: var(--blue); }
.signal span:nth-child(1){height:25%}.signal span:nth-child(2){height:43%}.signal span:nth-child(3){height:34%}.signal span:nth-child(4){height:68%}.signal span:nth-child(5){height:55%}.signal span:nth-child(6){height:90%;background:var(--sun)}
.profile-card dl { margin: 0; }
.profile-card dl div { padding: .8rem 0; border-bottom: 1px solid var(--line); }
.profile-card dt { color: var(--ink-soft); font-size: .78rem; }
.profile-card dd { margin: .15rem 0 0; font-weight: 680; line-height: 1.4; }
.credential { margin: 1rem 0 0; color: var(--blue); font-weight: 750; }

.band { padding: 6.5rem 2rem; background: var(--white); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-grid { grid-template-columns: 210px minmax(0,1fr); align-items: start; gap: clamp(2rem, 7vw, 7rem); }
.section h2, .band h2, .contact-section h2 { max-width: 850px; margin-bottom: 2.2rem; font-size: clamp(2.25rem, 4.6vw, 4.5rem); line-height: 1.07; }
.two-column-copy { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; color: var(--ink-soft); font-size: 1.08rem; }
.section { padding: 7rem 2rem; }
.side-note { max-width: 160px; color: var(--ink-soft); font-family: var(--serif); font-size: 1.05rem; line-height: 1.45; }
.research-list { border-top: 1px solid var(--line); }
.research-item { display: grid; grid-template-columns: 56px 1fr; gap: 1.4rem; padding: 2.2rem 0; border-bottom: 1px solid var(--line); }
.item-number { color: var(--blue); font-family: var(--serif); font-size: 1.2rem; }
.research-item h3, .teaching-grid h3, .timeline h3, .education h3 { margin-bottom: .7rem; font-family: var(--serif); font-size: 1.65rem; font-weight: 400; line-height: 1.25; }
.research-item p:not(.status):not(.methods) { max-width: 760px; color: var(--ink-soft); }
.methods { margin: 1rem 0 0; color: var(--blue); font-size: .82rem; font-weight: 750; }

.publication-section { background: var(--ink); color: var(--white); }
.section-kicker.light, .paper-meta { color: #9eafff; }
.featured-paper { max-width: 900px; }
.featured-paper h2 { margin-bottom: 1rem; }
.authors { color: #cbd3eb; font-weight: 650; }
.featured-paper > p:last-of-type { max-width: 720px; color: #cbd3eb; font-size: 1.06rem; }
.paper-link { display: inline-block; margin-top: 1.2rem; padding-bottom: .25rem; border-bottom: 1px solid var(--sun); color: var(--sun); text-decoration: none; font-weight: 750; }

.lead-copy { max-width: 840px; color: var(--ink-soft); font-size: 1.08rem; }
.teaching-grid { display: grid; grid-template-columns: 1fr 1fr; margin: 2.6rem 0 3.2rem; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.teaching-grid article { min-height: 230px; padding: 1.6rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.teaching-grid p:last-child { color: var(--ink-soft); }
.recognition { display: grid; gap: 0; border-top: 2px solid var(--ink); }
.recognition p { display: flex; justify-content: space-between; gap: 1rem; margin: 0; padding: .9rem 0; border-bottom: 1px solid var(--line); }
.recognition span { color: var(--blue); font-weight: 750; }

.leadership-section { background: #e9edfa; }
.impact-grid { display: grid; grid-template-columns: 1fr 1fr; margin-top: 2.6rem; border-top: 1px solid #cbd3eb; border-left: 1px solid #cbd3eb; }
.impact-grid article { min-height: 270px; padding: 1.7rem; border-right: 1px solid #cbd3eb; border-bottom: 1px solid #cbd3eb; }
.impact-grid h3 { margin-bottom: .7rem; font-family: var(--serif); font-size: 1.65rem; font-weight: 400; line-height: 1.25; }
.impact-grid p:last-child { color: var(--ink-soft); }
.impact-note { display: grid; grid-template-columns: 180px 1fr; gap: 1.5rem; margin-top: 2rem; padding-top: 1.4rem; border-top: 2px solid var(--ink); }
.impact-note p { margin: 0; color: var(--ink-soft); }

.experience-section { background: var(--white); }
.timeline { border-left: 2px solid var(--blue); padding-left: 2rem; }
.timeline article { position: relative; padding: 0 0 2.2rem; }
.timeline article::before { content: ''; position: absolute; width: 10px; height: 10px; left: calc(-2rem - 6px); top: .35rem; border-radius: 50%; background: var(--sun); border: 2px solid var(--white); box-shadow: 0 0 0 1px var(--blue); }
.timeline p:last-child { max-width: 800px; color: var(--ink-soft); }
.education { margin-top: 2.4rem; }
.education ul { margin: 1rem 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.education li { display: flex; justify-content: space-between; gap: 2rem; padding: .85rem 0; border-bottom: 1px solid var(--line); }
.education li span:first-child { font-weight: 700; }
.education li span:last-child { color: var(--ink-soft); text-align: right; }

.contact-section { padding: 7rem 2rem; background: var(--blue); color: var(--white); }
.contact-inner { grid-template-columns: 210px minmax(0,1fr); align-items: start; }
.contact-section p:not(.section-kicker) { max-width: 720px; color: #e4e8ff; font-size: 1.08rem; }
.contact-links { display: flex; flex-wrap: wrap; gap: 1rem 2rem; margin-top: 2rem; }
.contact-links a { color: var(--white); text-underline-offset: .3rem; font-weight: 750; }
footer { max-width: var(--max); margin: 0 auto; padding: 2rem; display: flex; justify-content: space-between; gap: 1rem; color: var(--ink-soft); font-size: .84rem; }
footer p { margin: 0; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .profile-card { max-width: 620px; }
  .section-grid, .contact-inner { grid-template-columns: 1fr; gap: 1.2rem; }
  .side-note { max-width: 520px; }
}

@media (max-width: 760px) {
  .nav-wrap { min-height: 68px; padding: 0 1rem; }
  .wordmark-name { display: none; }
  .menu-button { display: block; }
  .site-nav { display: none; position: absolute; left: 0; right: 0; top: 68px; padding: 1rem; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav.open { display: flex; }
  .site-nav a { padding: .7rem .4rem; }
  .site-nav .nav-contact { border: 0; }
  .hero { min-height: auto; padding: 4rem 1.2rem; }
  h1 { font-size: clamp(3rem, 14vw, 4.5rem); }
  .band, .section, .contact-section { padding: 4.5rem 1.2rem; }
  .two-column-copy, .teaching-grid { grid-template-columns: 1fr; }
  .impact-grid { grid-template-columns: 1fr; }
  .impact-note { grid-template-columns: 1fr; gap: .4rem; }
  .teaching-grid article { min-height: auto; }
  .education li { flex-direction: column; gap: .2rem; }
  .education li span:last-child { text-align: left; }
  footer { padding: 1.5rem 1.2rem; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }