/* ==========================================================================
   Minimal black-and-white academic style.
   Serif body (Forum), geometric sans for name and navigation (Jost).
   ========================================================================== */

:root {
  --ink: #111;
  --text: #2b2b2b;
  --grey: #6b6b6b;
  --rule: #d9d9d9;
  --link: #3a7fc1;
  --bg: #fff;
  --soft: #444;
  --head: #222;
  --tab: #333;
  --strong: #000;
  --sans: "Jost", "Futura", "Century Gothic", Arial, sans-serif;
  --serif: "Forum", Georgia, "Times New Roman", serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0 20px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.55;
}

a { color: var(--link); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

img { max-width: 100%; height: auto; }

h1, h2, h3 { color: var(--ink); font-family: var(--serif); font-weight: 700; line-height: 1.3; }
h2 { font-size: 19px; margin: 1.8em 0 0.6em; }
h3 { font-size: 17px; margin: 1.3em 0 0.4em; }
p  { margin: 0 0 0.9em; }
p, li, .row > span, .row > strong { text-wrap: pretty; }
h1, h2, h3 { text-wrap: balance; }
ul, ol { margin: 0 0 0.9em; padding-left: 1.3em; }
li { margin-bottom: 0.3em; }
hr { border: 0; border-top: 1px solid var(--rule); }
table { border-collapse: collapse; }


/* Header ----------------------------------------------------------------- */

.masthead-min {
  display: flex;
  align-items: center;
  gap: 28px;
  max-width: 760px;
  margin: 48px auto 0;
}

.portrait {
  position: relative;
  display: block;
  flex: 0 0 150px;
  width: 150px;
  height: 150px;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: 50%;
  background: #fff;
}
.portrait img {
  position: absolute;
  left: 5%;
  top: -16px;
  width: 90%;
  height: auto;
}

.identity p { margin: 0; font-family: var(--sans); font-size: 14.5px; color: var(--head); line-height: 1.45; }
.identity .name { margin-bottom: 6px; font-size: 36px; font-weight: 500; letter-spacing: 0.01em; line-height: 1.1; }
.identity .name a { color: var(--ink); text-decoration: none; }
.identity .interests { margin-top: 6px; color: var(--grey); font-size: 13.5px; }
.identity .interests .bio-highlight { display: block; }
.identity .contact { margin-top: 8px; color: var(--grey); font-size: 13px; }
.identity .profiles { margin-top: 2px; font-size: 13px; color: var(--grey); }


/* Navigation ------------------------------------------------------------- */

.tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 12px;
  max-width: 760px;
  margin: 34px auto 30px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ink);
  font-family: var(--sans);
  font-size: 15px;
}

.tabs a { color: var(--tab); text-decoration: none; padding: 2px 0; border-bottom: 2px solid transparent; }
.tabs a:hover { color: var(--strong); border-bottom-color: var(--rule); }
.tabs a.current { color: var(--strong); font-weight: 500; border-bottom-color: var(--ink); }


/* Content column --------------------------------------------------------- */

.page-body { max-width: 760px; margin: 0 auto; overflow-wrap: anywhere; }

.doc-title { margin: 0 0 0.4em; font-size: 24px; }
.doc-meta  { color: var(--grey); font-size: 15px; }

.muted  { color: var(--grey); }

/* Colour on hover: every photo and figure is shown in greyscale until pointed at. */
.portrait img, .theme-fig img, .book-cover { filter: grayscale(100%); transition: filter 0.35s ease; }
.portrait:hover img, .portrait:focus-visible img,
.theme-fig:hover img, .theme-fig:focus-visible img,
.book-item:hover .book-cover { filter: none; }
.small  { font-size: 14px; }
.status { color: var(--grey); font-style: italic; }

.prose p { text-align: justify; }


/* Home ------------------------------------------------------------------- */

.greeting { font-size: 18px; color: var(--ink); }

.news ul { list-style: none; padding: 0; }
.news li > div { display: flex; gap: 16px; margin-bottom: 0.6em; }
.news .news-date { flex: 0 0 92px; color: var(--grey); font-family: var(--sans); font-size: 14px; padding-top: 1px; }


/* Research --------------------------------------------------------------- */

h2.first { margin-top: 0; }

.venn { max-width: 540px; margin: 0 auto 1.2em; }
.venn svg { display: block; width: 100%; height: auto; overflow: visible; font-family: var(--sans); }
.venn .venn-label { font-size: 15px; font-weight: 600; fill: #111; text-anchor: middle; }
.venn .venn-text  { font-size: 13px; fill: #2b2b2b; text-anchor: middle; pointer-events: none; }
/* Venn: 7 regions, grey by default; a region takes its soft colour on hover,
   and hovering a circle label colours that whole circle. */
.venn .rg { fill: var(--g); transition: fill 0.3s ease; }
.venn .rg:hover,
.venn-svg.hl-P .inP, .venn-svg.hl-D .inD, .venn-svg.hl-T .inT { fill: var(--c); }
.venn-outlines circle { fill: none; stroke: #8a8a8a; stroke-width: 1; pointer-events: none; }
.venn .venn-label[data-set] { cursor: default; }

.theme {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 0 26px;
  align-items: start;
  margin: 0 0 3.4em;
}

.theme-fig { display: block; }
.theme-fig img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: left center; border: 1px solid var(--rule); }
.theme-fig.placeholder { display: flex; align-items: center; justify-content: center; aspect-ratio: 4 / 3; border: 1px dashed #bbb; color: var(--grey); font-family: var(--sans); font-size: 13px; text-align: center; }

.theme-body h3 { margin: 0 0 0.45em; font-size: 18px; }
.theme-body p { margin-bottom: 0.5em; font-size: 15px; text-align: left; }
.theme-body .quote { font-style: italic; color: var(--soft); }
.theme-body .theme-refs { margin: 0.6em 0 0; text-align: left; }
.theme-refs a { margin-right: 0.2em; }

.theme-text { position: relative; overflow: hidden; line-height: 1.55; }
.theme-text p { line-height: inherit; }
.theme-text.clamped::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1.6em;
  background: linear-gradient(transparent, var(--bg));
}
.theme-foot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 0 12px; margin-top: 0.4em; }
.theme-foot .theme-refs { margin: 0 !important; }
.theme-foot .theme-res { flex-basis: 100%; margin: 0 0 0.2em !important; text-align: left; }
.read-more {
  margin-left: auto; padding: 0; border: 0; background: none; cursor: pointer;
  color: var(--link); font-family: var(--sans); font-size: 13.5px;
  text-decoration: underline; text-underline-offset: 2px;
}
.read-more[hidden] { display: none; }

.interests-line { margin-bottom: 0.3em; }
.interests-more { margin: 0 0 1.4em; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.interests-more summary,
.news-more summary {
  display: inline; cursor: pointer; list-style: none;
  color: var(--link); font-family: var(--sans); font-size: 14px;
  text-decoration: underline; text-underline-offset: 2px;
}
.interests-more summary::-webkit-details-marker,
.news-more summary::-webkit-details-marker { display: none; }
.when-open { display: none; }
details[open] > summary .when-open { display: inline; }
details[open] > summary .when-closed { display: none; }
.news-more { margin-top: 0.2em; }
.news-more ul { margin-top: 0.7em; }

.interests-more .venn { margin-top: 0.8em; }


/* Publications ----------------------------------------------------------- */

.pub-list { padding-left: 1.6em; }
.pub-list li { margin-bottom: 0.85em; padding-left: 0.2em; font-size: 15px; }
.pub-list .pub-title { display: block; color: var(--ink); }
.pub-list .pub-authors { display: block; color: var(--soft); }
.pub-list .pub-venue { display: block; color: var(--soft); }
.pub-authors strong { font-weight: 700; color: var(--ink); }
.pub-links { font-family: var(--sans); font-size: 13px; white-space: nowrap; }
.pub-note { color: var(--grey); }

.pub-meta p { margin: 0 0 0.25em; }
.cite-box { margin-top: 1.4em; padding-top: 0.8em; border-top: 1px solid var(--rule); font-size: 14.5px; }


/* CV (laid out like the PDF: label | body) ------------------------------- */

.cv-download { font-family: var(--sans); font-size: 14px; text-align: right; margin: -0.6em 0 0.6em; }

.cvs {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0 20px;
  padding: 14px 0 6px;
  border-top: 1px solid var(--rule);
}
.cvs:first-of-type { border-top: 0; }

.cvs h2 { margin: 0; font-size: 15px; line-height: 1.35; }
.cvs-body { font-size: 15px; }
.cvs-body p { margin: 0 0 0.6em; }

.entry { margin-bottom: 0.9em; }
.row { display: flex; justify-content: space-between; align-items: baseline; gap: 14px; }
.row > span:last-child { flex-shrink: 0; text-align: right; }
.row > :first-child:not(:only-child) { min-width: 0; }

.sub { margin: 0.2em 0 0.3em !important; }
.entry .note { color: var(--soft); font-style: italic; }

.kv { display: grid; grid-template-columns: 138px 1fr; gap: 0.2em 14px; margin: 0 0 0.6em; font-size: 14.5px; }
.kv dt { color: var(--ink); }
.kv dd { margin: 0; }

.dated { display: grid; grid-template-columns: 80px 1fr; gap: 0.35em 14px; margin: 0 0 0.6em; }
.dated dt { color: var(--grey); font-family: var(--sans); font-size: 13.5px; padding-top: 2px; white-space: nowrap; }
.dated dd { margin: 0; }

.cites { margin: 0 0 0.8em; padding-left: 1.5em; }
.cites li { margin-bottom: 0.35em; }

.plain { margin: 0 0 0.6em; padding-left: 1.2em; }
.plain li { margin-bottom: 0.25em; }
.plain.cols { column-count: 2; column-gap: 20px; font-size: 14px; }
.plain.cols li { break-inside: avoid; }


/* Teaching --------------------------------------------------------------- */

.inst { margin-bottom: 0.2em; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.teach-group { margin: 0.9em 0 0.3em; }
.teach-list li { margin-bottom: 0.35em; }

.course .course-label { margin: 1.1em 0 0.3em; font-weight: 700; color: var(--ink); }

.book-list { display: flex; flex-wrap: wrap; gap: 14px; padding: 8px 0; }
.book-item { flex: 1 1 calc(33.33% - 14px); min-width: 170px; padding: 10px; border: 1px solid var(--rule); text-align: center; font-size: 13.5px; }
.book-cover { width: 96px; margin-bottom: 8px; }
.book-details { line-height: 1.4; }


/* Webliography ----------------------------------------------------------- */

.weblio ol { margin-left: 1.2em; padding-left: 0; }


/* Footer ----------------------------------------------------------------- */

.foot-min {
  max-width: 760px;
  margin: 50px auto 30px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  color: var(--grey);
  font-family: var(--sans);
  font-size: 13px;
  text-align: center;
}
.foot-min a { color: var(--link); }


/* Tablet ----------------------------------------------------------------- */

@media (max-width: 900px) {
  .masthead-min, .tabs, .page-body, .foot-min { max-width: 100%; }
  .theme { grid-template-columns: 170px 1fr; gap: 0 20px; }
  .cvs { grid-template-columns: 110px 1fr; }
  .plain.cols { column-count: 1; }
}


/* Phone ------------------------------------------------------------------ */

@media (max-width: 640px) {
  body { font-size: 15.5px; padding: 0 16px; }
  .masthead-min { flex-direction: column; text-align: center; margin-top: 28px; gap: 14px; }
  .portrait { flex-basis: 120px; width: 120px; height: 120px; }
  .identity .name { font-size: 30px; }
  .identity .contact { font-size: 12.5px; }
  .tabs { justify-content: center; gap: 4px 16px; margin: 24px auto 22px; }
  .theme { grid-template-columns: 1fr; }
  .theme-fig { margin-bottom: 12px; }
  .theme-fig img, .theme-fig.placeholder { aspect-ratio: 4 / 3; object-position: center; }
  .theme-body p { text-align: left; }
  .prose p { text-align: left; }
  .cvs { grid-template-columns: 1fr; }
  .cvs h2 { margin-bottom: 0.5em; }
  .cv-download { text-align: left; margin-top: 0; }
  .row { flex-direction: column; gap: 0; }
  .row > span:last-child { text-align: left; color: var(--grey); font-size: 14px; }
  .plain.cols { column-count: 1; }
  .kv { grid-template-columns: 1fr; gap: 0; }
  .kv dt { font-weight: 700; margin-top: 0.3em; }
  .news li > div { flex-direction: column; gap: 0; }
}


/* Dark theme (toggle in the header; choice remembered per visitor) -------- */

[data-theme="dark"] {
  --ink: #ececec;
  --text: #d2d2d2;
  --grey: #9a9a9a;
  --rule: #373b40;
  --link: #8ab8e6;
  --bg: #16181b;
  --soft: #b9b9b9;
  --head: #dedede;
  --tab: #c4c4c4;
  --strong: #fff;
  color-scheme: dark;
}

/* figures and the Venn diagram are drawn for a light background: keep them on a light card */
[data-theme="dark"] .theme-fig img { background: #fff; border-color: #fff; }
[data-theme="dark"] .venn svg { background: #f2f2f2; border-radius: 6px; }
[data-theme="dark"] .portrait { border-color: #555; }

.theme-toggle {
  position: absolute;
  top: 14px;
  right: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: none;
  color: var(--grey);
  cursor: pointer;
  transition: color 0.2s ease;
}
.theme-toggle:hover, .theme-toggle:focus-visible { color: var(--ink); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }