/* latin-ext */
@font-face {
  font-family: 'Lato';
  font-style: italic;
  font-weight: 400;
  src: local('Lato Italic'), local('Lato-Italic'), url(https://fonts.gstatic.com/s/lato/v15/S6u8w4BMUTPHjxsAUi-qNiXg7eU0.woff2) format('woff2');
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Lato';
  font-style: italic;
  font-weight: 400;
  src: local('Lato Italic'), local('Lato-Italic'), url(https://fonts.gstatic.com/s/lato/v15/S6u8w4BMUTPHjxsAXC-qNiXg7Q.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin-ext */
@font-face {
  font-family: 'Lato';
  font-style: italic;
  font-weight: 700;
  src: local('Lato Bold Italic'), local('Lato-BoldItalic'), url(https://fonts.gstatic.com/s/lato/v15/S6u_w4BMUTPHjxsI5wq_FQftx9897sxZ.woff2) format('woff2');
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Lato';
  font-style: italic;
  font-weight: 700;
  src: local('Lato Bold Italic'), local('Lato-BoldItalic'), url(https://fonts.gstatic.com/s/lato/v15/S6u_w4BMUTPHjxsI5wq_Gwftx9897g.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin-ext */
@font-face {
  font-family: 'Lato';
  font-style: normal;
  font-weight: 400;
  src: local('Lato Regular'), local('Lato-Regular'), url(https://fonts.gstatic.com/s/lato/v15/S6uyw4BMUTPHjxAwXiWtFCfQ7A.woff2) format('woff2');
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Lato';
  font-style: normal;
  font-weight: 400;
  src: local('Lato Regular'), local('Lato-Regular'), url(https://fonts.gstatic.com/s/lato/v15/S6uyw4BMUTPHjx4wXiWtFCc.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin-ext */
@font-face {
  font-family: 'Lato';
  font-style: normal;
  font-weight: 700;
  src: local('Lato Bold'), local('Lato-Bold'), url(https://fonts.gstatic.com/s/lato/v15/S6u9w4BMUTPHh6UVSwaPGQ3q5d0N7w.woff2) format('woff2');
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Lato';
  font-style: normal;
  font-weight: 700;
  src: local('Lato Bold'), local('Lato-Bold'), url(https://fonts.gstatic.com/s/lato/v15/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Base typography and link colours adapted from Jon Barron's website
   (https://github.com/jonbarron/jonbarron.github.io). */

:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-nav: rgba(255, 255, 255, 0.92);
  --text: #1f2328;
  --muted: #5b6370;
  --border: #e3e6ea;
  --link: #1772d0;
  --link-hover: #f09228;
  --accent-bg: #eef5fd;
  --highlight: #ffffd0;
  --chip-bg: #eef1f4;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15171a;
    --bg-soft: #1d2024;
    --bg-nav: rgba(21, 23, 26, 0.92);
    --text: #e6e8eb;
    --muted: #a0a7b1;
    --border: #2e333a;
    --link: #6cb2ff;
    --link-hover: #f5a54a;
    --accent-bg: #1a2634;
    --highlight: #3a3920;
    --chip-bg: #262a30;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #15171a;
  --bg-soft: #1d2024;
  --bg-nav: rgba(21, 23, 26, 0.92);
  --text: #e6e8eb;
  --muted: #a0a7b1;
  --border: #2e333a;
  --link: #6cb2ff;
  --link-hover: #f5a54a;
  --accent-bg: #1a2634;
  --highlight: #3a3920;
  --chip-bg: #262a30;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-padding-top: 70px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Lato', Verdana, Helvetica, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  transition: background .2s ease, color .2s ease;
}

a { color: var(--link); text-decoration: none; }
a:focus, a:hover { color: var(--link-hover); text-decoration: none; }

h2 {
  margin: 0 0 14px;
  font-weight: normal;
  font-size: 22px;
}

h3 {
  margin: 28px 0 8px;
  font-size: 17px;
  font-weight: 700;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Sticky navigation ---------- */
.topnav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg-nav);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}

.topnav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  gap: 12px;
}

.brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.brand:hover { color: var(--text); }

.navlinks {
  display: flex;
  align-items: center;
  gap: 4px;
}

.navlinks a {
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 15px;
}
.navlinks a:hover { color: var(--text); background: var(--bg-soft); }
.navlinks a.active { color: var(--link); font-weight: 700; }

.theme-toggle {
  margin-left: 6px;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle:hover { background: var(--bg-soft); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ---------- Pages ---------- */
main { padding: 36px 0 20px; }
.page { display: none; }
.page.active { display: block; }
section { margin-bottom: 40px; }

/* ---------- Profile ---------- */
.profile {
  display: flex;
  gap: 36px;
  align-items: flex-start;
}

.profile-text { flex: 1; min-width: 0; }

.name {
  padding-top: 0;
  margin: 0 0 4px;
  font-size: 32px;
  font-weight: normal;
}

.subtitle { margin: 0; font-size: 16px; }
.affiliation { margin: 0 0 14px; color: var(--muted); }

.profile-photo {
  width: 220px;
  flex-shrink: 0;
}
.profile-photo img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}
.links a { display: inline-flex; align-items: center; gap: 5px; }
.links svg { width: 15px; height: 15px; fill: currentColor; }

.callout {
  background: var(--accent-bg);
  border-left: 3px solid var(--link);
  padding: 12px 16px;
  border-radius: 6px;
  margin: 18px 0 0;
}

/* ---------- News ---------- */
.news-box {
  max-height: 220px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 16px;
  background: var(--bg-soft);
}
.news-box ul { list-style: none; margin: 0; padding: 0; }
.news-box li {
  display: flex;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border);
}
.news-box li:last-child { border-bottom: none; }
.news-date {
  flex-shrink: 0;
  width: 70px;
  font-weight: 700;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* ---------- Papers ---------- */
/* ---------- CV ---------- */
.cv-list { list-style: none; margin: 0; padding: 0; }
.cv-list li {
  display: flex;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.cv-list li:last-child { border-bottom: none; }
.cv-date {
  flex-shrink: 0;
  width: 120px;
  font-weight: 700;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.cv-sub { color: var(--muted); }

.papers { list-style: none; margin: 0; padding: 0; }
.paper {
  display: flex;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.paper:last-child { border-bottom: none; }

.paper-thumb {
  width: 160px;
  flex-shrink: 0;
}
.paper-thumb img {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border);
  display: block;
}

.paper-body { flex: 1; min-width: 0; }
.papertitle { font-size: 15px; font-weight: 700; }
.paper-authors, .paper-venue { margin: 2px 0 0; }
.paper-venue em { color: var(--muted); }
.paper-links { margin: 4px 0 0; }
.paper-links a + a::before {
  content: "/";
  color: var(--muted);
  margin: 0 6px;
}

.badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 0 7px;
  border-radius: 4px;
  background: var(--highlight);
  color: var(--text);
  margin-left: 6px;
  vertical-align: 1px;
}

span.highlight { background-color: var(--highlight); }

/* ---------- Research ---------- */
.intro { font-size: 16px; }
.project {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 22px 8px;
  margin-bottom: 24px;
}
.project h3 { margin-top: 0; }
.project .project-focus { color: var(--muted); margin-top: -4px; }

/* ---------- Team ---------- */
.people {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.person {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
}
.person-name { font-weight: 700; }
.person-role, .person-topic { margin: 0; font-size: 14px; }
.person-role { color: var(--muted); }
.empty { color: var(--muted); font-style: italic; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 20px 0 30px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
footer a { font-size: 13px; }

/* ---------- Small screens ---------- */
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .brand { font-size: 16px; }
  .navlinks a { padding: 6px 8px; font-size: 14px; }
  .profile { flex-direction: column-reverse; align-items: center; gap: 18px; }
  .profile-text { text-align: left; width: 100%; }
  .profile-photo { width: 160px; }
  .name { font-size: 26px; }
  .paper { flex-direction: column; gap: 10px; }
  .paper-thumb { width: 100%; max-width: 320px; }
  .news-date { width: 62px; }
  .cv-list li { flex-direction: column; gap: 2px; }
  .cv-date { width: auto; }
  .project { padding: 16px 16px 4px; }
}

@media (max-width: 380px) {
  .brand-long { display: none; }
}

/* ---------- Research articles ---------- */
.article {
  padding: 18px 0;
  border-top: 1px solid var(--border);
}
.article-head {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.article-figure {
  width: 200px;
  flex-shrink: 0;
}
.article-figure img {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border);
  display: block;
}
.figure-placeholder {
  aspect-ratio: 4 / 3;
  border: 2px dashed var(--border);
  border-radius: 6px;
  background: var(--bg-soft);
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.abstract {
  margin-top: 14px;
  padding: 12px 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.abstract-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.abstract p {
  margin: 0;
  font-size: 14px;
  text-align: justify;
  hyphens: auto;
}

@media (max-width: 640px) {
  .article-head { flex-direction: column; gap: 12px; }
  .article-figure { width: 100%; max-width: 320px; }
  .abstract p { text-align: left; }
}

.email { color: var(--link); font-weight: 700; overflow-wrap: anywhere; }