/* ==========================================================================
   Site styles. Colors and fonts live in the variables below — change them
   here and the whole site follows (light and dark mode).
   ========================================================================== */

:root {
  --bg: #ffffff;
  --bg-soft: #f4f7f8;
  --surface: #ffffff;
  --ink: #13212a;
  --ink-2: #3a4952;
  --muted: #64737c;
  --line: #e1e7ea;

  --accent: #0a6c86;
  --accent-hover: #075569;
  --accent-ink: #ffffff;
  --accent-soft: #e2f0f4;
  --green: #2d7a47;
  --green-soft: #e4f2e8;
  --amber: #875800;
  --amber-soft: #fbefd6;
  --violet: #5a4a9c;
  --violet-soft: #ece8f8;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(15, 33, 42, .05), 0 6px 20px rgba(15, 33, 42, .06);
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --maxw: 1100px;
  --narrow: 860px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1518;
    --bg-soft: #131c20;
    --surface: #162126;
    --ink: #e5ecef;
    --ink-2: #c2ced4;
    --muted: #8c9ba3;
    --line: #25333a;
    --accent: #5bbfdb;
    --accent-hover: #86d2e7;
    --accent-ink: #0e1518;
    --accent-soft: #15343d;
    --green: #7fcb96;
    --green-soft: #183223;
    --amber: #efc26c;
    --amber-soft: #382b11;
    --violet: #b6a9ef;
    --violet-soft: #29244a;
    --shadow: 0 0 0 1px var(--line);
  }
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16.5px/1.65 var(--font-sans);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-hover); }
h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 600; line-height: 1.25; color: var(--ink); margin: 0 0 .5em; }
p { margin: 0 0 1em; }
code { font-size: .9em; background: var(--bg-soft); padding: .1em .35em; border-radius: 4px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
[hidden] { display: none !important; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.narrow { max-width: var(--narrow); margin-left: auto; margin-right: auto; }
.center { justify-content: center; text-align: center; }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; border-radius: 6px; z-index: 100; }
.skip-link:focus { left: 8px; }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.brand { font-family: var(--font-serif); font-size: 1.2rem; font-weight: 600; color: var(--ink); text-decoration: none; }
.brand:hover { color: var(--accent); }
.site-nav { display: flex; gap: 2px; }
.site-nav a {
  color: var(--ink-2); text-decoration: none; font-weight: 500; font-size: .95rem;
  padding: .45rem .75rem; border-radius: var(--radius-sm);
}
.site-nav a:hover { background: var(--bg-soft); color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--ink); border-radius: var(--radius-sm); width: 42px; height: 38px; font-size: 1.05rem; cursor: pointer; }

@media (max-width: 780px) {
  .nav-toggle { display: inline-grid; place-items: center; }
  .site-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; padding: 8px 12px 14px;
    background: var(--bg); border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: .7rem .8rem; }
}

/* ---------- buttons & tags ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .45em;
  padding: .5rem .95rem; border-radius: var(--radius-sm);
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  font: 500 .92rem/1.2 var(--font-sans); text-decoration: none; cursor: pointer;
  transition: border-color .15s, background .15s, color .15s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-ink); }
.btn-sm { padding: .38rem .75rem; font-size: .85rem; }
.btn-xs { padding: .2rem .55rem; font-size: .78rem; border-radius: 6px; }
.btn-pill { border-radius: 999px; }
.actions, .link-row { display: flex; flex-wrap: wrap; gap: 8px; }
.actions { margin-top: .75rem; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: .45rem; }
.tags.inline { display: inline-flex; margin: 0 0 0 .25rem; vertical-align: 1px; }
.tag {
  display: inline-flex; align-items: center; gap: .35em;
  font: 600 .72rem/1 var(--font-sans); letter-spacing: .02em;
  padding: .32rem .55rem; border-radius: 999px;
  background: var(--bg-soft); color: var(--ink-2);
}
.tag-oral, .tag-seminar, .tag-panel, .tag-role { background: var(--accent-soft); color: var(--accent); }
.tag-poster, .tag-award { background: var(--amber-soft); color: var(--amber); }
.tag-invited, .tag-workshop, .tag-software { background: var(--green-soft); color: var(--green); }
.tag-coauthor, .tag-status { background: var(--violet-soft); color: var(--violet); }
.tag-upcoming { display: none; background: var(--green); color: var(--bg); }
.is-upcoming .tag-upcoming { display: inline-flex; }

/* ---------- layout pieces ---------- */
.section { padding: 56px 0; }
.section-tight { padding: 32px 0 64px; }
.section-alt { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-title { font-size: 1.6rem; margin-bottom: 1.1rem; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.more { font-size: .9rem; font-weight: 500; text-decoration: none; white-space: nowrap; }
.more i { font-size: .8em; margin-left: 2px; }
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 420px), 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 720px) { .grid-3 { grid-template-columns: minmax(0, 1fr); } }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1020px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .grid-4 { grid-template-columns: minmax(0, 1fr); } }
.two-col { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 56px; }
@media (max-width: 900px) { .two-col { grid-template-columns: minmax(0, 1fr); gap: 40px; } }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
}

.page-head { padding: 48px 0 20px; }
.page-head h1 { font-size: clamp(2rem, 4vw, 2.6rem); margin-bottom: .3em; }
.lead { font-size: 1.1rem; color: var(--ink-2); max-width: 62ch; }

/* ---------- home ---------- */
.hero { padding: 56px 0 48px; }
.hero-inner { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 48px; align-items: center; }
.hero-photo { width: 240px; height: auto; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 18px; box-shadow: var(--shadow); }
.hero h1 { font-size: clamp(2.3rem, 5vw, 3.1rem); margin-bottom: .15em; letter-spacing: -.01em; }
.hero-role { font-size: 1.2rem; color: var(--ink); font-weight: 500; margin: 0; }
.hero-affil { color: var(--muted); margin: .1rem 0 1.1rem; }
.hero-bio { color: var(--ink-2); max-width: 66ch; }
@media (max-width: 720px) {
  .hero { padding-top: 32px; }
  .hero-inner { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .hero-photo { width: 150px; }
}

.interest h3 { font-size: 1.08rem; margin: .8rem 0 .4rem; }
.interest p { color: var(--ink-2); font-size: .94rem; margin: 0; }
.interest-icon, .tool-icon {
  display: inline-grid; place-items: center; flex: none;
  width: 42px; height: 42px; border-radius: 10px;
  background: var(--accent-soft); color: var(--accent); font-size: 1.1rem;
}

.news { list-style: none; margin: 0; padding: 0; }
.news li { display: grid; grid-template-columns: 84px minmax(0, 1fr); gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.news li:first-child { padding-top: 0; }
.news-date { color: var(--muted); font-size: .85rem; font-weight: 600; font-variant-numeric: tabular-nums; padding-top: .15rem; }
.news-text { color: var(--ink-2); font-size: .97rem; }

.tool-mini { display: flex; gap: 14px; align-items: flex-start; text-decoration: none; color: var(--ink); transition: border-color .15s, transform .15s; }
.tool-mini:hover { border-color: var(--accent); color: var(--ink); transform: translateY(-2px); }
.tool-mini strong { display: block; font-size: 1.02rem; margin-bottom: .2rem; }
.tool-desc { display: block; color: var(--ink-2); font-size: .9rem; line-height: 1.5; }

.cta { text-align: center; }
.cta p { color: var(--ink-2); max-width: 56ch; margin: 0 auto 1.4rem; }

/* ---------- publications ---------- */
.year-group { margin-bottom: 36px; }
.year {
  font: 600 .85rem/1 var(--font-sans); letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
  display: flex; align-items: center; gap: 12px; margin-bottom: 14px;
}
.year::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.pubs { list-style: none; margin: 0; padding: 0; }
.pub { padding: 16px 0; border-bottom: 1px solid var(--line); }
.pub:first-child { padding-top: 4px; }
.pub p { margin: 0 0 .2rem; }
.pub-title { font-weight: 600; font-size: 1.02rem; line-height: 1.45; }
.pub-title a { color: var(--ink); text-decoration: none; }
.pub-title a:hover { color: var(--accent); text-decoration: underline; }
.pub-authors { color: var(--ink-2); font-size: .93rem; }
.pub-venue { color: var(--muted); font-size: .93rem; }
.pub-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: .5rem; }
.me { color: var(--ink); font-weight: 600; text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 3px; }
.pubs-compact .pub-title { font-size: .98rem; }

/* ---------- presentations ---------- */
.stats { display: flex; flex-wrap: wrap; gap: 12px 36px; margin: 1.4rem 0 0; }
.stats div { display: flex; flex-direction: column-reverse; }
.stats dt { color: var(--muted); font-size: .82rem; font-weight: 500; text-transform: uppercase; letter-spacing: .06em; }
.stats dd { margin: 0; font: 600 2rem/1.1 var(--font-serif); color: var(--ink); }

.filter-bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 12px 0 18px; margin-bottom: 18px; border-bottom: 1px solid var(--line);
  position: sticky; top: 64px; background: var(--bg); z-index: 5;
}
.filter-label { color: var(--muted); font-size: .85rem; font-weight: 500; margin-right: 4px; }
.filter-bar button {
  font: 500 .86rem/1 var(--font-sans); color: var(--ink-2); cursor: pointer;
  background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: .5rem .85rem;
}
.filter-bar button span { color: var(--muted); font-weight: 600; margin-left: .25rem; }
.filter-bar button:hover { border-color: var(--accent); }
.filter-bar button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.filter-bar button[aria-pressed="true"] span { color: inherit; opacity: .8; }
.empty-note { color: var(--muted); text-align: center; padding: 32px 0; }

.event {
  display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 20px;
  padding: 22px; margin-bottom: 16px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.event.is-upcoming { border-color: var(--green); }
.event-date {
  display: flex; flex-direction: column; align-items: center; justify-content: center; align-self: start;
  border-radius: 10px; background: var(--accent-soft); color: var(--accent); padding: 10px 4px; text-align: center;
}
.event-month { font: 600 .75rem/1 var(--font-sans); text-transform: uppercase; letter-spacing: .08em; }
.event-day { font: 600 1.35rem/1.2 var(--font-serif); white-space: nowrap; }
.event-head h3 { font-size: 1.2rem; margin-bottom: .25rem; }
.event-head h3 a { color: inherit; }
.event-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px; color: var(--muted); font-size: .9rem; margin: 0; }
.event-meta i { margin-right: .4em; opacity: .8; }

.talks { list-style: none; margin: 14px 0 0; padding: 0; }
.talk { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; padding: 14px 0 2px; border-top: 1px dashed var(--line); }
.talk.has-thumb { grid-template-columns: minmax(0, 1fr) 150px; }
.talk-title { font: 600 1rem/1.45 var(--font-sans); margin: 0 0 .2rem; }
.talk-title a { color: var(--ink); text-decoration: none; }
.talk-title a:hover { color: var(--accent); text-decoration: underline; }
.talk-authors { color: var(--ink-2); font-size: .9rem; margin: 0 0 .2rem; }
.talk-note { color: var(--violet); font-size: .88rem; font-weight: 500; margin: .1rem 0 0; }
.talk-note i { margin-right: .45em; }
.talk-thumb { display: block; align-self: start; border-radius: 8px; overflow: hidden; border: 1px solid var(--line); }
.talk-thumb img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .25s; }
.talk-thumb:hover img { transform: scale(1.04); }

@media (max-width: 640px) {
  .event { grid-template-columns: minmax(0, 1fr); padding: 18px; gap: 10px; }
  .event-date { flex-direction: row; gap: 6px; justify-self: start; padding: 6px 10px; }
  .event-day { font-size: 1rem; }
  .talk.has-thumb { grid-template-columns: minmax(0, 1fr); }
  .talk-thumb { order: -1; max-width: 320px; }
  .filter-bar { position: static; }
}

/* ---------- poster page ---------- */
.poster-head { padding-bottom: 12px; }
.poster-head h1 { font-size: clamp(1.55rem, 3.2vw, 2.2rem); max-width: 30em; }
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; font-size: .88rem; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); }
.poster-figure { margin: 0 0 20px; }
.poster-figure img { width: 100%; border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow); }
.poster-figure figcaption { text-align: center; color: var(--muted); font-size: .85rem; margin-top: 10px; }
.poster-pdf { width: 100%; height: 80vh; border: 1px solid var(--line); border-radius: var(--radius); }
.abstract { margin-top: 36px; }
.presenter-card {
  display: flex; gap: 18px; align-items: center; margin-top: 40px; padding: 20px;
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius);
}
.presenter-card img { width: 76px; height: 76px; border-radius: 50%; object-fit: cover; flex: none; }
.presenter-name { font: 600 1.1rem/1.3 var(--font-serif); margin: 0; }
.presenter-role { color: var(--muted); font-size: .92rem; margin: 0 0 .7rem; }
@media (max-width: 560px) { .presenter-card { flex-direction: column; align-items: flex-start; } }

/* ---------- software ---------- */
.tool { display: flex; flex-direction: column; }
.tool-head { display: flex; gap: 14px; align-items: center; margin-bottom: 12px; }
.tool-head h2 { font-size: 1.25rem; margin: 0 0 .25rem; }
.tool > p { color: var(--ink-2); }
.tool .actions { margin-top: auto; padding-top: .4rem; }
.keywords { display: flex; flex-wrap: wrap; gap: 6px; }
.keywords span { font-size: .78rem; color: var(--muted); border: 1px solid var(--line); border-radius: 6px; padding: .15rem .5rem; }

/* ---------- CV ---------- */
.cv-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; }
.cv-head .lead { margin: 0 0 .6rem; }
.eyebrow { font: 600 .8rem/1 var(--font-sans); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin: 0 0 .7rem; }
.cv-contact { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0; font-size: .92rem; }
.cv-contact a { color: var(--ink-2); text-decoration: none; white-space: nowrap; }
.cv-contact a:hover { color: var(--accent); }
.cv-contact i { margin-right: .4em; color: var(--muted); }
.cv { padding-bottom: 64px; }
.cv-section { padding: 26px 0 8px; border-top: 1px solid var(--line); }
.cv-section h2 { font-size: 1.35rem; margin-bottom: 1rem; }
.cv-entry { margin-bottom: 1.4rem; }
.cv-row { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.cv-row h3 { font: 600 1.02rem/1.4 var(--font-sans); margin: 0; }
.cv-dates { color: var(--muted); font-size: .9rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.cv-org { color: var(--ink-2); font-style: italic; margin: 0 0 .4rem; }
.cv ul, .cv ol { padding-left: 1.2rem; margin: 0 0 .5rem; color: var(--ink-2); }
.cv li { margin-bottom: .35rem; }
.cv-details { list-style: none; padding-left: 0 !important; font-size: .95rem; }
.cv-details li { margin-bottom: .1rem; }
.cv-list li { padding-left: .25rem; }
.cv-awards { list-style: none; padding: 0 !important; }
.cv-awards li { display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 10px; }
.cv-year { color: var(--muted); font-variant-numeric: tabular-nums; }
.cv-skills { margin: 0; }
.cv-skills div { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 12px; padding: .35rem 0; }
.cv-skills dt { font-weight: 600; }
.cv-skills dd { margin: 0; color: var(--ink-2); }
@media (max-width: 560px) { .cv-skills div { grid-template-columns: minmax(0, 1fr); gap: 0; } }

/* ---------- about ---------- */
.about { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 56px; align-items: start; }
.about-side { position: sticky; top: 90px; }
.about-photo { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 16px; box-shadow: var(--shadow); margin-bottom: 18px; }
.contact-list { list-style: none; margin: 0; padding: 0; font-size: .92rem; color: var(--ink-2); }
.contact-list li { display: flex; gap: 10px; align-items: baseline; padding: .3rem 0; overflow-wrap: anywhere; }
.contact-list i { width: 16px; color: var(--muted); }
.prose { max-width: 68ch; color: var(--ink-2); font-size: 1.04rem; }
.prose h2 { font-size: 1.45rem; margin-top: 1.6em; }
.prose h2:first-child { margin-top: 0; }
.prose ul { padding-left: 1.2rem; }
.prose li { margin-bottom: .4rem; }
.prose strong { color: var(--ink); font-weight: 600; }
@media (max-width: 820px) {
  .about { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .about-side { position: static; display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
  .about-photo { width: 140px; margin: 0; }
}

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-soft); color: var(--muted); font-size: .88rem; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 12px 24px; flex-wrap: wrap; padding-top: 22px; padding-bottom: 22px; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-icons { display: inline-flex; gap: 8px; color: var(--accent); }

/* ---------- print (CV page prints cleanly) ---------- */
@media print {
  .site-header, .site-footer, .btn, .filter-bar, .skip-link { display: none !important; }
  body { font-size: 11pt; background: #fff; color: #000; }
  .page-head { padding: 0 0 8px; }
  .cv-section { break-inside: avoid-page; }
  a { color: inherit; text-decoration: none; }
}