:root {
  --text: #202124;
  --muted: #5f6368;
  --blue: #2457a6;
  --blue-dark: #173e78;
  --paper: #fbfbfa;
  --white: #ffffff;
  --line: #dfe2e6;
  --soft-line: #eceef0;
  --max-width: 1060px;
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  color: var(--text);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); text-underline-offset: 3px; }
a:hover { color: var(--blue-dark); }
img { display: block; max-width: 100%; }

.container { width: min(var(--max-width), calc(100% - 44px)); margin: 0 auto; }

.skip-link {
  position: fixed;
  z-index: 20;
  top: 8px;
  left: 8px;
  padding: 8px 12px;
  color: var(--white);
  background: var(--blue-dark);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(251, 251, 250, 0.96);
  backdrop-filter: blur(10px);
}

.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 28px; }
.site-name { color: var(--text); font-family: var(--serif); font-size: 20px; font-weight: 700; text-decoration: none; white-space: nowrap; }
nav { display: flex; align-items: center; gap: 25px; }
nav a { color: var(--muted); font-size: 13px; font-weight: 600; text-decoration: none; }
nav a:hover { color: var(--blue); }

.intro { padding-top: 66px; padding-bottom: 82px; }
.intro-heading { margin-bottom: 30px; }
.intro-content { display: grid; grid-template-columns: minmax(330px, 380px) minmax(0, 1fr); gap: 54px; align-items: start; }
.portrait { margin: 0; }
.portrait img { width: 100%; height: auto; aspect-ratio: 1.15 / 1; border: 1px solid var(--line); border-radius: 5px; object-fit: cover; object-position: 55% center; }
h1, h2, h3 { color: #17191c; }
h1 { margin: 0; font-family: var(--serif); font-size: clamp(2.7rem, 6vw, 4.1rem); line-height: 1.05; font-weight: 600; }
.intro-copy { padding-top: 2px; }
.intro-copy > p { max-width: 650px; margin: 0 0 16px; }
.intro-copy .lead { margin-bottom: 16px; }
.profile-links { display: flex; gap: 20px; margin-top: 25px; }
.profile-links a { font-size: 14px; font-weight: 600; }

.experience, .publications, .education, .beliefs { padding-top: 74px; padding-bottom: 80px; border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 36px; }
h2 { margin: 0; font-family: var(--serif); font-size: clamp(2rem, 4vw, 3rem); line-height: 1.18; font-weight: 600; }
.experience-entry { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; padding: 32px 0 34px; border-top: 1px solid var(--soft-line); }
.experience-entry:last-child { padding-bottom: 0; }
.experience-meta h3 { margin: 0 0 4px; font-family: var(--serif); font-size: 19px; line-height: 1.35; }
.experience-meta p { margin: 0; color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.experience-copy { max-width: 760px; }
.experience-copy > p { margin: 0 0 14px; }
.experience-copy .experience-impact { margin-top: 20px; margin-bottom: 0; }
.experience-copy .experience-note { margin-top: 20px; margin-bottom: 0; }
.plain-enumeration { margin: 10px 0 0; padding-left: 25px; }
.plain-enumeration li { margin-bottom: 10px; padding-left: 5px; }
.plain-enumeration li::marker { color: var(--blue); font-weight: 700; }
.venue { color: var(--muted); font-size: 0.9em; white-space: nowrap; }

.compact-heading { align-items: center; }
.scholar-note { margin: 0; }

.education-list { display: grid; grid-template-columns: 1fr 1fr; gap: 35px; }
.education-list article { padding-top: 19px; border-top: 2px solid var(--blue); }
.education-list p { margin: 0; }
.education-list .degree { margin-bottom: 8px; font-family: var(--serif); font-size: 18px; font-weight: 600; }
.education-list span { color: var(--muted); font-size: 13px; }

.belief-list { max-width: 890px; margin: 0; padding-left: 25px; }
.belief-list li { margin-bottom: 18px; padding-left: 5px; }
.belief-list li:last-child { margin-bottom: 0; }
.belief-list li::marker { color: var(--blue); font-weight: 700; }

footer { background: #f3f4f5; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; min-height: 92px; gap: 30px; color: var(--muted); font-size: 12px; }
.footer-inner p { margin: 0; }
.footer-inner div { display: flex; gap: 20px; }
.footer-inner a { text-decoration: none; }

@media (max-width: 900px) {
  .intro-content { grid-template-columns: minmax(280px, 320px) minmax(0, 1fr); gap: 38px; }
}

@media (max-width: 800px) {
  html { scroll-padding-top: 118px; }
  .header-inner { align-items: flex-start; flex-direction: column; gap: 8px; padding: 13px 0 11px; }
  nav { width: 100%; gap: 18px; overflow-x: auto; padding-bottom: 2px; }
  nav a { white-space: nowrap; }
  .intro { padding-top: 46px; padding-bottom: 62px; }
  .intro-heading { margin-bottom: 24px; }
  .intro-content { grid-template-columns: 1fr; gap: 28px; }
  .portrait { max-width: 420px; }
  .education-list, .experience-entry { grid-template-columns: 1fr; }
  .experience-entry { gap: 16px; }
}

@media (max-width: 500px) {
  .container { width: min(var(--max-width), calc(100% - 30px)); }
  body { font-size: 15px; }
  .site-name { font-size: 18px; }
  nav { justify-content: space-between; gap: 10px; }
  nav a { font-size: 12px; }
  .portrait img { width: 100%; height: auto; aspect-ratio: 1.35 / 1; object-position: 55% 46%; }
  .profile-links { flex-wrap: wrap; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 10px; }
  .experience, .publications, .education, .beliefs { padding-top: 58px; padding-bottom: 64px; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; gap: 10px; }
}

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