/* ==========================================================================
   Wilfried Thuiller — site design system
   Plain CSS, no build step. Shared across the 8 main pages.
   ========================================================================== */

:root {
  --bg: #f6f5f0;
  --surface: #ffffff;
  --surface-alt: #eeece1;
  --text: #1f2420;
  --text-muted: #5c6355;
  --accent: #2b4d33;
  --accent-strong: #1c3722;
  --accent-soft: #e2e9de;
  --border: #dedad0;
  --shadow: 0 1px 2px rgba(20, 24, 18, 0.06), 0 8px 24px rgba(20, 24, 18, 0.05);

  --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --container: 760px;
  --container-wide: 980px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14170e;
    --surface: #1b1f15;
    --surface-alt: #212617;
    --text: #e8e6da;
    --text-muted: #a3a996;
    --accent: #83bd97;
    --accent-strong: #a4d1b3;
    --accent-soft: #23301f;
    --border: #333827;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}
:root[data-theme="dark"] {
  --bg: #14170e; --surface: #1b1f15; --surface-alt: #212617; --text: #e8e6da;
  --text-muted: #a3a996; --accent: #83bd97; --accent-strong: #a4d1b3;
  --accent-soft: #23301f; --border: #333827;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
}
:root[data-theme="light"] {
  --bg: #f6f5f0; --surface: #ffffff; --surface-alt: #eeece1; --text: #1f2420;
  --text-muted: #5c6355; --accent: #2b4d33; --accent-strong: #1c3722;
  --accent-soft: #e2e9de; --border: #dedad0;
  --shadow: 0 1px 2px rgba(20, 24, 18, 0.06), 0 8px 24px rgba(20, 24, 18, 0.05);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

img { max-width: 100%; display: block; }

a { color: var(--accent-strong); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 400; text-wrap: balance; margin: 0; }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.site-header-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.site-brand {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.site-brand:hover { color: var(--text); }
.site-brand .role {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 40px;
  height: 36px;
  cursor: pointer;
  position: relative;
}
.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  height: 2px;
  background: var(--text);
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.nav-toggle::before { top: 12px; }
.nav-toggle span { top: 17px; }
.nav-toggle::after { top: 22px; }
.nav-toggle[aria-expanded="true"]::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"]::after { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle[aria-expanded="true"] span { opacity: 0; }

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
}
.site-nav a {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 0.02em;
}
.site-nav a:hover { color: var(--text); background: var(--surface-alt); }
.site-nav a[aria-current="page"] {
  color: var(--accent-strong);
  font-weight: 600;
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: none;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; padding: 8px; gap: 0; }
  .site-nav a { padding: 12px; border-radius: 6px; }
}

/* ---------- Page shell ---------- */

main { display: block; }

.page-header {
  padding: 48px 20px 8px;
}
.page-header-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.page-header-inner.wide { max-width: var(--container-wide); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}

.page-title { font-size: clamp(28px, 5vw, 40px); }

.page-lede {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 62ch;
  margin: 14px 0 0;
}

section.content {
  padding: 24px 20px 64px;
}
.content-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.content-inner.wide { max-width: var(--container-wide); }

/* ---------- Prose ---------- */

.prose p { margin: 0 0 18px; }
.prose p:last-child { margin-bottom: 0; }
.prose h2 {
  font-size: 22px;
  margin: 40px 0 12px;
  color: var(--text);
}
.prose h2:first-child { margin-top: 0; }
.prose h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  margin: 24px 0 6px;
  color: var(--text);
}
.prose a { text-decoration: underline; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 18px; }
.prose li { margin: 4px 0; }
.prose strong { color: var(--text); }

/* ---------- Cards (Projects) ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}
.funder-badge {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  background: #fff;
  border-radius: 6px;
  padding: 3px 7px;
  box-shadow: 0 1px 2px rgba(20, 24, 18, 0.15);
}
.funder-badge img { display: block; height: 20px; width: auto; }

.card-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  text-transform: uppercase;
}
.card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 400;
  margin: 0;
}
.card .subtitle {
  font-size: 14px;
  color: var(--text-muted);
  font-style: italic;
}
.card p { font-size: 14.5px; margin: 0; color: var(--text); }
.card .people { font-size: 13px; color: var(--text-muted); margin-top: auto; padding-top: 6px; }

.past-projects { list-style: none; margin: 0; padding: 0; }
.past-project {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.past-project:last-child { border-bottom: none; }
.past-project .p-title {
  font-family: var(--font-display);
  font-size: 16px;
}
.past-project .p-title a { color: var(--text); text-decoration: underline; text-decoration-color: var(--border); }
.past-project .p-title a:hover { color: var(--accent-strong); text-decoration-color: var(--accent-strong); }
.past-project .p-subtitle {
  font-size: 13.5px;
  font-style: italic;
  color: var(--text-muted);
  margin-top: 2px;
}
.past-project .p-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-top: 4px;
  max-width: 70ch;
}

.section-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 56px 0 24px;
}
.section-divider:first-child { margin-top: 0; }
.section-divider h2 {
  font-size: 20px;
  white-space: nowrap;
}
.section-divider::after {
  content: "";
  height: 1px;
  background: var(--border);
  flex: 1;
}

/* ---------- People ---------- */

.people-photos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 24px 0 8px;
}
.people-photos img { border-radius: 10px; width: 100%; height: 220px; object-fit: cover; }
@media (max-width: 560px) {
  .people-photos { grid-template-columns: 1fr; }
  .people-photos img { height: auto; }
}

.people-page h2 {
  font-size: 22px;
  margin: 48px 0 14px;
  color: var(--text);
}
.people-page h2:first-child { margin-top: 0; }
.people-page h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  margin: 28px 0 10px;
  color: var(--text);
}
.people-page > p { color: var(--text-muted); font-size: 15px; max-width: 62ch; }
.people-page .alumni-flow {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-muted);
  margin: 0 0 8px;
}
.people-page .alumni-flow a { color: var(--accent-strong); }

.people-group { margin: 40px 0; }
.people-group h2 { font-size: 19px; margin: 0 0 14px; }
.people-list { list-style: none; margin: 0; padding: 0; }
.people-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  font-size: 14.5px;
}
.people-item:last-child { border-bottom: none; }
.people-item .years {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  padding-top: 2px;
}
.people-item .name { font-weight: 600; }
.people-item .desc { color: var(--text-muted); }
@media (max-width: 560px) {
  .people-item { grid-template-columns: 1fr; gap: 2px; }
}
.people-list--flat .people-item { grid-template-columns: 1fr; }

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

.pub-year {
  font-family: var(--font-display);
  font-size: 26px;
  margin: 44px 0 14px;
  color: var(--accent-strong);
}
.pub-year:first-of-type { margin-top: 0; }
.pub-list { list-style: none; margin: 0 0 8px; padding: 0; }
.pub-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14.5px;
  display: flex;
  gap: 10px;
}
.pub-item:last-child { border-bottom: none; }
.pub-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  padding-top: 2px;
  min-width: 34px;
}
.pub-citation { flex: 1; }
.pub-links { white-space: nowrap; font-size: 13px; }
.pub-links a { margin-left: 8px; }
.pub-links a:first-child { margin-left: 0; }

.pub-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
}
.pub-jump a {
  padding: 4px 8px;
  border-radius: 5px;
  background: var(--surface-alt);
  text-decoration: none;
  color: var(--text-muted);
}
.pub-jump a:hover { color: var(--text); }

/* ---------- Figures & CTA (Monitoring) ---------- */

.figure-panel {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 24px 0;
}
.figure-panel img { border-radius: 4px; }
.figure-panel .caption {
  font-family: var(--font-body);
  font-size: 13px;
  color: #5b6152;
  margin: 14px 4px 2px;
  line-height: 1.6;
}
.figure-panel .caption strong { color: #22261d; }

.cta-box {
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 30px;
  margin: 40px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.cta-box .cta-text h3 { margin: 0 0 4px; font-size: 19px; }
.cta-box .cta-text p { margin: 0; color: var(--text-muted); font-size: 14px; max-width: 48ch; }
.cta-box .btn {
  display: inline-block;
  background: var(--accent-strong);
  color: var(--bg);
  font-weight: 600;
  font-size: 14px;
  padding: 11px 20px;
  border-radius: 8px;
  text-decoration: none;
  white-space: nowrap;
}
.cta-box .btn:hover { opacity: 0.88; color: var(--bg); }

/* ---------- CV ---------- */

.cv-header-flex {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
}
.cv-header-text { flex: 1 1 auto; min-width: 0; }
.cv-header-photo {
  flex: 0 0 auto;
  width: 220px;
}
.cv-header-photo img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.cv-header-photo-credit {
  font-size: 11px;
  color: var(--text-muted);
  text-align: right;
  margin: 6px 0 0;
}

/* ---------- Lightbox ---------- */

.lightbox-trigger {
  position: relative;
  display: block;
  width: 100%;
  cursor: zoom-in;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
}
.lightbox-trigger img { display: block; width: 100%; }
.lightbox-trigger::after {
  content: "Click to enlarge";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  color: #fff;
  background: rgba(20, 24, 18, 0.45);
  border-radius: 10px;
  opacity: 0;
  transition: opacity 0.15s;
}
.lightbox-trigger:hover::after,
.lightbox-trigger:focus-visible::after { opacity: 1; }

.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: rgba(10, 12, 8, 0.88);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s;
}
.lightbox-overlay.is-open { opacity: 1; visibility: visible; }
.lightbox-overlay img {
  max-width: 92vw;
  max-height: 92vh;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.lightbox-close {
  position: absolute;
  top: 20px;
  right: 28px;
  background: none;
  border: none;
  color: #fff;
  font-size: 36px;
  line-height: 1;
  cursor: pointer;
  padding: 8px;
}
.cv-header-photo--lg { width: 270px; }
.cv-header-photo--xwide { width: 340px; }
.cv-header-photo--diagram img { border-radius: 0; box-shadow: none; }
@media (max-width: 720px) {
  .cv-header-flex { flex-direction: column-reverse; }
  .cv-header-photo { width: 160px; align-self: flex-end; }
  .cv-header-photo--lg { width: 200px; }
  .cv-header-photo--xwide { width: 240px; }
}

.page-header-logo {
  flex: 0 0 auto;
  width: 130px;
  display: block;
  transition: opacity 0.15s;
}
.page-header-logo:hover { opacity: 0.82; }
.page-header-logo img { width: 100%; height: auto; display: block; }
@media (max-width: 720px) {
  .page-header-logo { width: 96px; align-self: flex-end; }
}

.cv-intro {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 14px;
  color: var(--text-muted);
  margin: 4px 0 0;
}
.cv-intro a { color: var(--text-muted); }
.cv-intro a:hover { color: var(--accent-strong); }

.cv-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin: 28px 0 48px;
}
.cv-stats .stat-tile {
  background: var(--surface);
  padding: 18px 18px;
}
.cv-stats .stat-tile .n {
  font-family: var(--font-display);
  font-size: 26px;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  display: block;
}
.cv-stats .stat-tile .l {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.4;
}

.cv-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin: 0 0 8px;
}
@media (max-width: 720px) {
  .cv-columns { grid-template-columns: 1fr; gap: 8px; }
}
.cv-columns > div > h2:first-child { margin-top: 0; }

/* ---------- Software platform cards ---------- */

.platform-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 24px 0 40px;
}
@media (max-width: 720px) {
  .platform-grid { grid-template-columns: 1fr; }
}

.platform-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.platform-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.platform-logo {
  flex: 0 0 auto;
  width: 64px;
  height: auto;
  display: block;
}
.platform-card .platform-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
}
.platform-card h2 {
  font-size: 24px;
  margin: 0;
}
.platform-card .tagline {
  color: var(--text-muted);
  font-size: 14.5px;
  font-style: italic;
  margin-top: -8px;
}
.platform-card p.description {
  font-size: 14.5px;
  margin: 0;
}

.gh-stats {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  padding: 12px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.gh-stats .stat { display: flex; flex-direction: column; gap: 2px; min-width: 64px; }
.gh-stats .stat .label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}
.gh-stats .stat .value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.gh-stats .stat .value:empty::before { content: "\2026"; color: var(--text-muted); }
.gh-stats .stat a.value { color: var(--accent-strong); text-decoration: none; }
.gh-stats .stat a.value:hover { text-decoration: underline; }
.platform-card.gh-stats-error .gh-stats { display: none; }

.platform-card pre.code-block { margin: 0; font-size: 12.5px; }

.platform-links { display: flex; gap: 14px; flex-wrap: wrap; font-size: 13.5px; }

.pub-highlight {
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  margin: 0 0 40px;
  font-size: 14.5px;
}
.pub-highlight .h-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-strong);
  margin-bottom: 6px;
  display: block;
}

/* ---------- Code ---------- */

pre.code-block {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text);
}

.citation-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: cite;
}
.citation-list li {
  counter-increment: cite;
  padding: 10px 0 10px 34px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-muted);
  position: relative;
}
.citation-list li:last-child { border-bottom: none; }
.citation-list li::before {
  content: counter(cite);
  position: absolute;
  left: 0;
  top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

/* ---------- Misc components ---------- */

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 99px;
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.logo-row {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.logo-row img { height: 56px; width: auto; }

.contact-block {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
}
.contact-block strong { color: var(--text); }

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

.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 20px 48px;
  color: var(--text-muted);
  font-size: 13px;
}
.site-footer-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Utility ---------- */

.table-scroll { overflow-x: auto; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}