:root {
  --ink: #3f474b;
  --heading: #30363a;
  --muted: #727b80;
  --line: #e7e9e9;
  --link: #4c9295;
  --link-dark: #2e7478;
  --soft: #f4f8f7;
  --accent: #dba64a;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Source Serif 4", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body { margin: 0; color: var(--ink); background: #fff; font-family: var(--sans); font-size: 16px; line-height: 1.72; -webkit-font-smoothing: antialiased; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--link-dark); }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(10px); }
.nav-wrap { max-width: 1210px; min-height: 82px; margin: 0 auto; padding: 0 26px; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.site-name { color: var(--heading); font-size: 18px; font-weight: 700; text-decoration: none; white-space: nowrap; }
nav { display: flex; align-items: center; gap: clamp(22px, 3vw, 44px); }
nav a { color: #626a6e; font-size: 15px; font-weight: 500; text-decoration: none; transition: color .2s; }
nav a:hover, nav a.active { color: var(--link-dark); }
.menu-button { display: none; border: 1px solid var(--line); background: #fff; color: var(--heading); border-radius: 4px; padding: 7px 11px; font: inherit; font-size: 13px; }

.page-shell { max-width: 1210px; margin: 0 auto; padding: 48px 26px 100px; display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: clamp(55px, 8vw, 110px); align-items: start; }
.profile { position: sticky; top: 120px; }
.portrait-wrap { width: 178px; height: 178px; margin: 0 0 22px; border-radius: 50%; overflow: hidden; border: 5px solid #f0f2f2; background: radial-gradient(circle at 50% 45%, #f7fbfa, #dfecea); display: grid; place-items: center; }
.portrait-wrap img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.profile h2 { margin: 0 0 2px; color: var(--heading); font-size: 19px; }
.role { margin: 0 0 20px; color: var(--muted); font-size: 13px; }
.profile-details { list-style: none; padding: 0; margin: 0 0 18px; font-size: 13px; line-height: 1.55; }
.profile-details li { display: grid; grid-template-columns: 15px 1fr; gap: 7px; margin: 9px 0; }
.profile-details span { color: var(--link); font-size: 9px; padding-top: 4px; }
.profile-details .location { display: block; padding-left: 22px; color: var(--muted); }
.profile-links { border-top: 1px solid var(--line); padding-top: 13px; display: grid; gap: 8px; }
.profile-links a { color: var(--ink); text-decoration: none; font-size: 13px; display: flex; gap: 8px; align-items: center; }
.profile-links a:hover { color: var(--link-dark); }
.profile-links span { width: 19px; height: 19px; display: inline-grid; place-items: center; background: #edf3f2; color: var(--link-dark); border-radius: 50%; font-size: 9px; font-weight: 700; }

.content { min-width: 0; max-width: 830px; }
.content-section { padding: 74px 0 25px; border-top: 1px solid var(--line); }
.content-section.first-section { border-top: 0; padding-top: 0; }
.content h1 { margin: 0 0 25px; color: var(--heading); font-family: var(--serif); font-size: clamp(31px, 4vw, 42px); line-height: 1.15; letter-spacing: -.025em; }
.content h3 { color: var(--heading); font-size: 17px; line-height: 1.35; margin: 0; }
.content p { margin: 0 0 22px; }
.lead { color: #555f64; font-size: 21px; line-height: 1.6; }
.notice { margin-top: 34px; padding: 18px 20px; background: var(--soft); border-left: 3px solid var(--link); display: grid; gap: 3px; font-size: 14px; }
.notice strong { color: var(--heading); }
.notice span { color: var(--muted); }

.research-list { margin-top: 35px; border-top: 1px solid var(--line); }
.research-list article { display: grid; grid-template-columns: 48px 1fr; gap: 18px; padding: 25px 0; border-bottom: 1px solid var(--line); }
.research-number { color: var(--link); font-family: var(--serif); font-size: 20px; }
.research-list p { color: var(--muted); font-size: 14px; margin: 7px 0 0; }
.section-title-row { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; }
.section-title-row > a { font-size: 13px; white-space: nowrap; }
.publication-list { list-style: none; counter-reset: pubs; margin: 0; padding: 0; }
.publication-list li { counter-increment: pubs; position: relative; padding: 27px 0 27px 50px; border-top: 1px solid var(--line); }
.publication-list li::before { content: counter(pubs, decimal-leading-zero); position: absolute; left: 0; top: 28px; color: var(--link); font-family: var(--serif); font-size: 18px; }
.publication-list p { margin: 4px 0; font-size: 14px; line-height: 1.55; }
.publication-list p:first-child { color: var(--heading); font-size: 16px; }
.publication-list em { color: #60696e; }
.simple-list { list-style: none; margin: 30px 0 0; padding: 0; }
.simple-list li { border-top: 1px solid var(--line); padding: 17px 0; font-size: 14px; }
.simple-list strong { color: var(--link-dark); margin-right: 8px; }
.talk-list { list-style: none; padding: 0; margin: 30px 0 0; border-top: 1px solid var(--line); }
.talk-list li { display: grid; grid-template-columns: 70px 1fr; gap: 25px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.talk-list time { color: var(--link-dark); font-family: var(--serif); font-size: 18px; }
.talk-list div { display: grid; gap: 5px; }
.talk-list strong { color: var(--heading); line-height: 1.45; }
.talk-list span { color: var(--muted); font-size: 13px; }

footer { border-top: 1px solid var(--line); max-width: 1210px; margin: 0 auto; padding: 35px 26px 45px; display: flex; align-items: end; justify-content: space-between; gap: 30px; color: var(--muted); font-size: 12px; }
footer div { display: grid; }
footer strong { color: var(--heading); font-size: 14px; }
footer p { margin: 0; }

@media (max-width: 800px) {
  html { scroll-padding-top: 72px; }
  .nav-wrap { min-height: 68px; padding: 0 20px; flex-wrap: wrap; }
  .menu-button { display: block; }
  nav { display: none; flex-basis: 100%; padding: 4px 0 18px; gap: 0; flex-wrap: wrap; }
  nav.open { display: flex; }
  nav a { width: 50%; padding: 7px 0; }
  .page-shell { padding: 34px 20px 75px; grid-template-columns: 1fr; gap: 50px; }
  .profile { position: static; display: grid; grid-template-columns: 140px 1fr; column-gap: 25px; align-items: start; }
  .portrait-wrap { width: 140px; height: 140px; grid-row: 1 / span 4; }
  .profile h2 { padding-top: 13px; }
  .role { margin-bottom: 8px; }
  .profile-details { margin-bottom: 8px; }
  .profile-links { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 9px 20px; margin-top: 7px; }
  .content-section { padding-top: 58px; }
}

@media (max-width: 500px) {
  body { font-size: 15px; }
  .profile { grid-template-columns: 105px 1fr; column-gap: 19px; }
  .portrait-wrap { width: 105px; height: 105px; border-width: 3px; }
  .profile h2 { padding-top: 3px; }
  .profile-details li { margin: 5px 0; }
  .profile-details .location { display: none; }
  .lead { font-size: 18px; }
  .section-title-row { align-items: start; }
  .publication-list li { padding-left: 38px; }
  .talk-list li { grid-template-columns: 52px 1fr; gap: 15px; }
  footer { display: grid; }
}

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