:root {
  --bg: #f8f9f6;
  --ink: #252d2b;
  --muted: #58635d;
  --accent: #205b50;
  --line: #dce2dc;
  --body: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --name: Georgia, 'Times New Roman', serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 var(--body); }
::selection { background: #d5e8df; color: var(--ink); }
a { color: var(--accent); text-decoration: none; text-underline-offset: 3px; }
a:hover { text-decoration: underline; }
button, input { font: inherit; }
button { cursor: pointer; }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 4px;
}
header, main, footer { max-width: 960px; margin: auto; padding: 0 32px; }
header { height: 72px; display: flex; align-items: center; justify-content: flex-end; }
nav { display: flex; gap: 24px; font-size: 15px; }
nav a { color: var(--muted); }
section { scroll-margin-top: 28px; }
h1 { font-family: var(--name); font-size: 52px; font-weight: 400; line-height: 1.15; letter-spacing: -0.025em; margin: 0 0 24px; }
h2 { font: 400 28px/1.25 var(--name); margin: 0; }
h3 { font: 600 18px/1.35 var(--body); margin: 0 0 6px; }
h3 a { color: var(--ink); }
.intro { display: grid; grid-template-columns: minmax(0, 1fr) 196px; gap: 56px; padding: 64px 0 48px; align-items: start; }
.intro-copy { min-width: 0; }

.lead { font-size: 18px; line-height: 1.6; max-width: 62ch; margin: 0; }
.portrait { margin: 2px 0 0; }
.portrait img { display: block; width: 196px; height: 232px; object-fit: cover; object-position: 50% 40%; border-radius: 2px; }
.bio-details { margin-top: 14px; }
.bio-details p { margin: 12px 0 0; color: var(--muted); max-width: 65ch; }
.bio-details summary { display: inline-flex; gap: 8px; align-items: center; font-size: 15px; color: var(--accent); }
summary { cursor: pointer; }
.bio-details summary, .research-direction summary { list-style: none; }
.bio-details summary::-webkit-details-marker, .research-direction summary::-webkit-details-marker { display: none; }
.bio-details summary::after, .research-direction summary::after { content: ''; width: 6px; height: 6px; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: rotate(45deg); margin-left: 5px; margin-bottom: 3px; flex-shrink: 0; }
.bio-details[open] summary::after, .research-direction[open] summary::after { transform: rotate(225deg); margin-bottom: -3px; }
.bio-details .bio-less, .bio-details[open] .bio-more { display: none; }
.bio-details[open] .bio-less { display: inline; }
.profile-links { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 18px; font-size: 16px; }
.profile-links a { text-decoration: underline; text-decoration-color: #afc6be; }
.profile-links a:hover { text-decoration-color: var(--accent); }
.research-topics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px 26px; border-top: 1px solid var(--line); padding-top: 24px; }
.research-topics h2 { grid-column: 1 / -1; font-size: 20px; margin-bottom: 2px; }
.research-direction { min-width: 0; }
.research-direction summary { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 6px 0; font-size: 16px; color: var(--accent); }
.research-direction ul { list-style: none; padding: 0; margin: 8px 0 0; font-size: 15px; color: var(--muted); line-height: 1.65; }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 20px; margin: 38px 0 18px; }
.small-link { font-size: 15px; }
.publication-tools { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.tabs { display: flex; gap: 20px; }
.tabs button { border: 0; border-bottom: 2px solid transparent; border-radius: 0; background: transparent; padding: 8px 0; font-size: 15px; color: var(--muted); }
.tabs button[aria-pressed='true'] { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.tabs button span { margin-left: 4px; font-size: 13px; }
.search input { width: 250px; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; background: transparent; color: var(--ink); font-size: 15px; padding: 8px 0; caret-color: var(--accent); }
.search input::placeholder { color: var(--muted); opacity: 1; }
.result-count { font-size: 14px; color: var(--muted); margin: 10px 0 2px; }
.paper { display: grid; grid-template-columns: 78px minmax(0, 1fr); gap: 22px; padding: 18px 0; }
.paper-meta { display: flex; flex-direction: column; gap: 3px; font-size: 15px; color: var(--muted); font-variant-numeric: tabular-nums; padding-top: 1px; }
.venue { font-size: 13px; color: var(--accent); line-height: 1.4; }
.authors { font-size: 15px; color: var(--muted); line-height: 1.45; margin: 0 0 6px; }
.authors strong { font-weight: 600; color: var(--ink); }
.summary { font-size: 16px; color: var(--muted); line-height: 1.5; margin: 6px 0; }
.paper-links { display: flex; flex-wrap: wrap; gap: 18px; font-size: 15px; }
.paper-links a { text-decoration: underline; text-decoration-color: #afc6be; }
.paper-links a:hover { text-decoration-color: var(--accent); }
.equal { font-size: 14px; color: var(--muted); margin-top: 12px; }
.news { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 40px; border-top: 1px solid var(--line); padding: 30px 0; margin-top: 30px; }
.news-list p { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 18px; margin: 0 0 16px; font-size: 16px; }
.news-list time { color: var(--muted); font-size: 14px; font-variant-numeric: tabular-nums; padding-top: 2px; }
.news-list summary { font-size: 15px; color: var(--accent); }
.news-list details[open] summary { margin-bottom: 16px; }
footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding-top: 20px; padding-bottom: 26px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.no-results { color: var(--muted); padding: 24px 0; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.skip { position: absolute; top: -80px; left: 20px; background: var(--bg); padding: 10px; z-index: 5; }
.skip:focus { top: 10px; }
@media (max-width: 760px) {
  header, main, footer { padding-left: 24px; padding-right: 24px; }
  .intro { grid-template-columns: minmax(0, 1fr) 150px; gap: 30px; }
  .portrait img { width: 150px; height: 190px; }
  h1 { font-size: 36px; }
  .research-topics { gap: 12px 18px; }
  .research-direction summary { align-items: start; }
  .research-direction summary::after { margin-top: 6px; }
}
@media (max-width: 600px) {
  header { height: 66px; }
  nav { gap: 16px; font-size: 14px; }
  .intro { grid-template-columns: 1fr; padding-top: 24px; padding-bottom: 28px; }
  .portrait { display: block; grid-row: 1; justify-self: start; margin: 0 0 4px; }
  .portrait img { width: 92px; height: 108px; }

  .lead { font-size: 18px; }
  .profile-links { gap: 2px 20px; }
  .profile-links a { padding: 8px 0; }
  .bio-details summary { padding: 6px 0; }
  .research-topics { grid-template-columns: 1fr; gap: 6px; }
  .research-topics h2 { margin-bottom: 4px; }
  .research-direction summary { min-height: 44px; align-items: center; padding: 8px 0; }
  .research-direction summary::after { margin-top: 0; }
  .research-direction ul { margin-top: 0; margin-bottom: 12px; }
  .publication-tools { flex-wrap: wrap; gap: 8px; }
  .search, .search input { width: 100%; }
  .tabs button { min-height: 44px; }
  .section-heading { margin-top: 30px; gap: 12px; }
  .paper { grid-template-columns: 1fr; gap: 6px; padding: 18px 0; }
  .paper-meta { flex-direction: row; align-items: baseline; gap: 12px; }
  .paper-links { gap: 22px; }
  .paper-links a { padding: 6px 0; }
  .news { grid-template-columns: 1fr; gap: 18px; padding: 26px 0; }
  .news-list p { gap: 12px; grid-template-columns: 62px minmax(0,1fr); }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  nav, .publication-tools,   .paper[hidden] { display: grid !important; }
  .paper { break-inside: avoid; }
  body { background: white; }
}

.paper-links { position: relative; align-items: center; }
.paper-tldr { margin: 0; }
.paper-tldr summary { display: inline-flex; align-items: center; gap: 6px; list-style: none; color: var(--accent); cursor: pointer; font-size: 13px; }
.paper-tldr summary::-webkit-details-marker { display: none; }
.paper-tldr summary::after { content: ''; width: 5px; height: 5px; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: rotate(45deg); margin-bottom: 3px; }
.paper-tldr[open] summary::after { transform: rotate(225deg); margin-bottom: -2px; }
.paper-tldr .summary { position: absolute; z-index: 2; left: 0; right: 0; top: 100%; margin: 6px 0 0; padding: 12px 16px; border: 1px solid var(--line); border-radius: 3px; background: var(--bg); box-shadow: 0 4px 12px #252d2b12; }
@media(max-width:600px) { .paper-tldr summary { min-height: 36px; } }

/* Quiet editorial details: a shared line weight, generous spacing, restrained motion. */
header { position: relative; }
header::after { content: ''; position: absolute; bottom: 0; left: 32px; right: 32px; height: 1px; background: var(--line); }
nav a { position: relative; padding: 8px 0; transition: color .2s; }
nav a::after { content: ''; position: absolute; bottom: 2px; left: 0; right: 0; height: 1px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .25s ease; }
nav a:hover, nav a[aria-current] { text-decoration: none; color: var(--accent); }
nav a:hover::after, nav a[aria-current]::after { transform: scaleX(1); }
.portrait { position: relative; isolation: isolate; }
.portrait::before { content: ''; position: absolute; inset: 10px -10px -10px 10px; border: 1px solid #bacbc2; z-index: -1; transition: transform .4s ease; }
.portrait img { filter: saturate(.8); transition: filter .4s ease; }
.portrait:hover::before { transform: translate(3px, 3px); }
.portrait:hover img { filter: saturate(1); }
.icon { width: 18px; height: 18px; flex-shrink: 0; }
.profile-links { gap: 12px 20px; margin-top: 24px; font-size: 14px; }
.profile-links a { display: inline-flex; align-items: center; gap: 7px; text-decoration: none; color: var(--muted); transition: color .2s, transform .2s; }
.profile-links a:hover { color: var(--accent); transform: translateY(-2px); }
.profile-links .icon { width: 16px; height: 16px; }
.research-topics { padding: 25px 0 28px; border-bottom: 1px solid var(--line); gap: 18px 24px; }
.research-topics h2 { font: 500 12px/1.5 var(--body); text-transform: uppercase; letter-spacing: .12em; color: var(--muted); }
.research-direction summary { justify-content: start; font-size: 14px; gap: 10px; }
.research-direction summary span { flex: 1; }
.research-direction ul { list-style: disc; padding-left: 17px; font-size: 14px; }
.research-direction li { padding-left: 3px; margin: 4px 0; }
.research-direction li::marker { color: var(--accent); font-size: .7em; }
summary::after { transition: transform .22s ease; }
.outward::after { content: '↗'; display: inline-block; margin-left: 7px; transition: transform .2s; }
.outward:hover::after { transform: translate(2px, -2px); }
.section-heading { margin-top: 44px; }
.paper { position: relative; border-bottom: 1px solid var(--line); padding: 24px 0; }
.paper:last-child { border-bottom: 0; }
.paper::before { content: ''; position: absolute; left: -14px; top: 24px; bottom: 24px; width: 2px; background: var(--accent); opacity: 0; transform: scaleY(.5); transition: opacity .25s, transform .25s; }
.paper:hover::before, .paper:focus-within::before { opacity: .6; transform: scaleY(1); }
h3 a { transition: color .2s; }
h3 a:hover { color: var(--accent); text-decoration: none; }
.tabs button { transition: color .2s, border-color .2s; }
.search { position: relative; }
.search::before { content: ''; position: absolute; top: 12px; left: 1px; width: 9px; height: 9px; border: 1.4px solid var(--muted); border-radius: 50%; }
.search::after { content: ''; position: absolute; left: 11px; top: 22px; height: 5px; width: 1.4px; background: var(--muted); transform: rotate(-45deg); }
.search input { padding-left: 25px; transition: border-color .2s; }
.search input:focus { border-bottom-color: var(--accent); }
.news-list { border-left: 1px solid var(--line); padding-left: 24px; }
.news-list p { position: relative; grid-template-columns: 76px minmax(0, 1fr); margin-bottom: 24px; }
.news-list time { white-space: nowrap; }
.news-list p::before { content: ''; position: absolute; width: 7px; height: 7px; left: -28px; background: var(--bg); top: 10px; border: 1px solid #91aba0; border-radius: 50%; }
@keyframes arrive { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: no-preference) {
  .intro-copy { animation: arrive .65s ease both; }
  .portrait { animation: arrive .8s .1s ease both; }
  .research-topics { animation: arrive .65s .18s ease both; }
  details[open] > ul, .bio-details[open] > p { animation: arrive .25s ease both; }
  .paper-tldr[open] .summary { animation: arrive .2s ease both; }
}
@media (max-width: 760px) {
  header::after { left: 24px; right: 24px; }
  .intro { gap: 32px; }
  .research-direction summary { font-size: 13px; gap: 8px; }
}
@media (max-width: 600px) {
  .intro { gap: 20px; padding-top: 32px; padding-bottom: 32px; }
  h1 { font-size: 40px; margin-bottom: 18px; }
  .lead { font-size: 17px; }
  .profile-links { gap: 4px 18px; margin-top: 18px; }
  .research-topics { padding-bottom: 20px; gap: 4px; }
  .research-topics h2 { margin-bottom: 12px; }
  .research-direction summary { font-size: 15px; }
  .section-heading { margin-top: 34px; }
  .news { gap: 22px; }
  .news-list { padding-left: 20px; }
  .news-list p { grid-template-columns: 72px minmax(0, 1fr); gap: 12px; }
  .news-list p::before { left: -24px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

.bio-toggle { display: inline-flex; align-items: center; gap: 8px; border: 0; padding: 6px 0; background: transparent; color: var(--accent); font-size: 15px; }
.bio-toggle::after { content: ''; width: 6px; height: 6px; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: rotate(45deg); margin: 0 5px 3px; transition: transform .22s ease; }
.bio-toggle[data-stage='2']::after { transform: rotate(225deg); margin-bottom: -3px; }
.bio-panel p { margin: 12px 0 0; }
.personal-life { border-left: 1px solid var(--line); padding-left: 16px; margin-top: 18px; }
.personal-life p { font-size: 16px; }
@media (prefers-reduced-motion: no-preference) { .bio-panel:not([hidden]) { animation: arrive .25s ease both; } }
@media (prefers-reduced-motion: reduce) { .bio-toggle::after { transition: none; } }