/* ==========================================================================
   Academic Precision — design tokens
   Ported from stitch/academic_precision/DESIGN.md + the "refined_2" screens.
   To switch the accent back to the DESIGN.md blue, change --primary here only.
   ========================================================================== */

:root {
  /* Surface & text */
  --surface: #f9f9f9;
  --surface-lowest: #ffffff;
  --surface-low: #f3f3f3;
  --surface-container: #eeeeee;
  --surface-variant: #e2e2e2;
  --on-surface: #1a1c1c;
  --on-surface-variant: #424656;
  --outline: #727687;
  --outline-variant: #c2c6d8;

  /* Accent — green (#099268). DESIGN.md blue alternative: #1856b2 */
  --primary: #099268;
  /* Same hue, dark enough for small text: 5.34:1 on white vs 3.95:1 for
     --primary. Use --primary for fills, rules and display-size accents;
     use --primary-text for anything at body size or smaller. */
  --primary-text: #077a57;
  --primary-hover: #066a4b;
  --on-primary: #ffffff;
  --primary-container: #d1fae5;
  --on-primary-container: #022c22;

  --error: #ba1a1a;

  /* Type */
  --font-display: "Plus Jakarta Sans", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, monospace;

  --text-display: clamp(2rem, 1.35rem + 2.6vw, 3rem);
  --text-headline: clamp(1.5rem, 1.3rem + 0.8vw, 1.875rem);
  --text-headline-sm: 1.5rem;
  --text-title: 1.25rem;
  --text-body-lg: 1.125rem;
  --text-body: 1rem;
  --text-label: 0.875rem;
  --text-caption: 0.75rem;

  /* Space — 8px scale */
  --s-1: 8px;
  --s-2: 16px;
  --s-3: 24px;
  --s-4: 32px;
  --s-6: 48px;
  --s-8: 64px;
  --section-gap: 80px;
  --container: 1200px;
  --prose-width: 46rem; /* font-independent: `ch` would differ per font-size */
  --margin-inline: 16px;

  /* Shape */
  --radius: 4px;
  --radius-lg: 8px;

  --border: 1px solid color-mix(in srgb, var(--outline-variant) 45%, transparent);
  --transition: 200ms cubic-bezier(0.2, 0, 0, 1);
}

@media (min-width: 768px) {
  :root { --margin-inline: 40px; }
}

[data-theme="dark"] {
  --surface: #141616;
  --surface-lowest: #0e1010;
  --surface-low: #1a1c1c;
  --surface-container: #1f2222;
  --surface-variant: #2a2d2d;
  --on-surface: #f0f1f1;
  --on-surface-variant: #b3b8c4;
  --outline: #8a8e9e;
  --outline-variant: #414652;

  --primary: #34d399;
  --primary-text: #34d399;
  --primary-hover: #6ee7b7;
  --on-primary: #022c22;
  --primary-container: #06382a;
  --on-primary-container: #a7f3d0;

  --error: #ffb4ab;
}

/* ==========================================================================
   Base
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  background: var(--surface-lowest);
  color: var(--on-surface);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }

::selection {
  background: color-mix(in srgb, var(--primary) 20%, transparent);
  color: var(--primary-text);
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: var(--radius);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0;
  color: var(--on-surface);
}

p { margin: 0; }

a { color: inherit; text-decoration: none; }

.skip-link {
  position: absolute;
  left: var(--margin-inline);
  top: -100px;
  z-index: 100;
  padding: var(--s-1) var(--s-2);
  background: var(--primary);
  color: var(--on-primary);
  border-radius: var(--radius);
  font-size: var(--text-label);
  transition: top var(--transition);
}
.skip-link:focus { top: 12px; }

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--margin-inline);
}

.section { padding-block: clamp(48px, 8vw, var(--section-gap)); }
.section--rule { border-top: var(--border); }
.section--tinted { background: var(--surface); }

.section-head {
  padding-bottom: var(--s-2);
  margin-bottom: var(--s-4);
  border-bottom: var(--border);
}

.section-title {
  font-size: var(--text-headline);
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 500;
}

.grid { display: grid; gap: var(--s-3); }

@media (min-width: 768px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
}

.grid--auto { grid-template-columns: repeat(auto-fit, minmax(258px, 1fr)); }

.route[hidden] { display: none; }

.page-title {
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  /* Share the body's measure so the heading and the prose below it line up on
     both edges; balance keeps a long title from breaking into a stub line. */
  max-width: var(--prose-width);
  text-wrap: balance;
}

.section-head--row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
}

.eyebrow {
  font-size: var(--text-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  font-weight: 500;
}

.lede {
  font-size: var(--text-body-lg);
  color: var(--on-surface-variant);
  max-width: var(--prose-width);
}
.lede--stack {
  display: grid;
  gap: var(--s-2);
  margin-top: var(--s-3);
  font-size: var(--text-body);
  line-height: 1.7;
  max-width: var(--prose-width);
}

/* The lab name needs ~1017px to stay on one line. Once there is room for it,
   widen the intro to match so both edges line up. Below that width the title
   wraps anyway, so the block returns to the normal reading measure. */
@media (min-width: 1100px) {
  .lab-intro { --prose-width: 64rem; }
  /* One wide column, so the extra leading below is what keeps a ~125-character
     line trackable from the end of one line to the start of the next. */
  .lab-intro .lede--stack { line-height: 1.8; }
}

.icon { width: 20px; height: 20px; flex: none; stroke-width: 1.6; }
.icon--sm { width: 16px; height: 16px; }

/* ==========================================================================
   Header
   ========================================================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--surface-lowest) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  height: 72px;
}

.brand {
  font-family: var(--font-display);
  font-size: var(--text-title);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav { display: none; align-items: center; gap: var(--s-4); }

@media (min-width: 900px) { .nav { display: flex; } }

.nav__link {
  font-size: var(--text-label);
  font-weight: 500;
  color: var(--on-surface-variant);
  padding-block: 4px;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.nav__link:hover { color: var(--primary-text); }
.nav__link[aria-current="page"] {
  color: var(--on-surface);
  border-bottom-color: var(--primary);
}

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

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  color: var(--on-surface);
  transition: background var(--transition);
}
.icon-btn:hover { background: var(--surface-variant); }

.nav-toggle { display: inline-flex; }
@media (min-width: 900px) { .nav-toggle { display: none; } }

.nav-toggle .icon--close, .nav-toggle[aria-expanded="true"] .icon--menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon--close { display: block; }

/* Show the icon for the theme you would switch *to*. */
[data-theme="light"] .icon--sun { display: none; }
[data-theme="dark"] .icon--moon { display: none; }

/* Mobile drawer */
.mobile-nav {
  display: block;
  border-bottom: var(--border);
  background: var(--surface-lowest);
  overflow: hidden;
  max-height: 0;
  transition: max-height 280ms cubic-bezier(0.2, 0, 0, 1);
}
.mobile-nav[data-open="true"] { max-height: 420px; }
@media (min-width: 900px) { .mobile-nav { display: none; } }

.mobile-nav__list {
  list-style: none;
  margin: 0;
  padding: var(--s-1) 0 var(--s-2);
}
.mobile-nav__list a {
  display: block;
  padding: 14px var(--margin-inline);
  font-size: var(--text-body);
  font-weight: 500;
  color: var(--on-surface-variant);
  border-left: 2px solid transparent;
}
.mobile-nav__list a[aria-current="page"] {
  color: var(--on-surface);
  border-left-color: var(--primary);
  background: var(--surface);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero { background: linear-gradient(180deg, var(--surface) 0%, var(--surface-lowest) 100%); }

.hero__inner {
  display: grid;
  gap: var(--s-6);
  align-items: center;
  padding-block: clamp(48px, 9vw, 96px);
}

@media (min-width: 860px) {
  .hero__inner { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); }
  .hero__portrait { justify-self: end; }
}

.hero__title {
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 24ch;
}
.hero__title .accent { color: var(--primary); font-weight: 500; }

.hero__standfirst {
  margin-top: var(--s-3);
  max-width: 58ch;
  font-size: var(--text-body-lg);
  color: var(--on-surface-variant);
}

.hero__ctas {
  margin-top: var(--s-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
}

.hero__portrait img {
  width: clamp(128px, 22vw, 200px);
  height: clamp(128px, 22vw, 200px);
  border-radius: 999px;
  object-fit: cover;
  border: var(--border);
  background: var(--surface);
  filter: grayscale(1);
  transition: filter 700ms ease;
}
.hero__portrait img:hover { filter: grayscale(0); }

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  font-size: var(--text-label);
  font-weight: 500;
  padding-block: var(--s-1);
  border-bottom: 1px solid var(--primary);
  width: fit-content;
  transition: color var(--transition);
}
.arrow-link:hover { color: var(--primary-text); }
.arrow-link .icon { transition: transform var(--transition); }
.arrow-link:hover .icon { transform: translateX(4px); }

/* Home identity block — no headline, just who and where. */
.intro {
  display: grid;
  gap: var(--s-3) var(--s-6);
  align-items: center;
  justify-items: start;
  padding-block: clamp(48px, 8vw, 88px);
}
@media (min-width: 640px) { .intro { grid-template-columns: auto minmax(0, 1fr); } }

.intro__portrait {
  width: clamp(120px, 20vw, 180px);
  height: clamp(120px, 20vw, 180px);
  border-radius: 999px;
  object-fit: cover;
  border: var(--border);
  background: var(--surface);
}

.intro__name {
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.intro__affiliation {
  margin-top: var(--s-1);
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--on-surface-variant);
  max-width: 52ch;
}
.intro__affiliation a {
  color: var(--on-surface-variant);
  border-bottom: 1px solid var(--outline-variant);
}
.intro__affiliation a:hover { color: var(--primary-text); border-bottom-color: var(--primary-text); }

.intro__lab {
  margin-top: var(--s-3);
  padding-top: var(--s-3);
  border-top: var(--border);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-body-lg);
  letter-spacing: -0.005em;
  max-width: 56ch;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: var(--text-label);
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.btn--primary { background: var(--primary-text); color: var(--on-primary); }
.btn--primary:hover { background: var(--primary-hover); }
.btn--primary:disabled {
  background: var(--outline-variant);
  color: var(--on-surface-variant);
  cursor: not-allowed;
  opacity: 0.75;
}
.btn--primary:disabled:hover { background: var(--outline-variant); }
.btn--ghost { border-color: var(--outline-variant); background: transparent; }
.btn--ghost:hover { border-color: var(--on-surface); }

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  padding: var(--s-3);
  background: var(--surface-lowest);
  border: var(--border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}
.card:hover {
  box-shadow: 0 8px 24px rgb(0 0 0 / 4%);
  border-color: color-mix(in srgb, var(--outline-variant) 90%, transparent);
}

.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--surface-low);
  color: var(--on-surface-variant);
}

.card__title { font-size: var(--text-title); font-weight: 600; }
.card__body { color: var(--on-surface-variant); font-size: var(--text-body); }
.card__foot { margin-top: auto; padding-top: var(--s-1); }
.card__meta {
  font-size: var(--text-caption);
  color: var(--on-surface-variant);
  border-top: var(--border);
  padding-top: var(--s-2);
}

.tags { display: flex; flex-wrap: wrap; gap: var(--s-1); list-style: none; margin: 0; padding: 0; }
.tag {
  font-size: var(--text-caption);
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 4px 10px;
  border-radius: var(--radius);
  background: var(--surface-low);
  color: var(--on-surface-variant);
  border: 1px solid color-mix(in srgb, var(--outline-variant) 30%, transparent);
}

/* ==========================================================================
   News timeline
   ========================================================================== */

.news { display: grid; gap: var(--s-4); }
@media (min-width: 900px) { .news { grid-template-columns: minmax(0, 1fr) minmax(0, 2.2fr); gap: var(--s-8); } }

/* A continuous vertical line threads every entry together, so the list keeps
   reading as one timeline no matter how many items accumulate over time —
   unlike a bordered list, adding entry #40 looks exactly like entry #4. */
.news__year + .news__year { margin-top: var(--s-4); }
.news__more > .news__year:first-child { margin-top: var(--s-4); }

.news__year-head {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  margin-bottom: var(--s-2);
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--on-surface-variant);
}
.news__rule { flex: 1; height: 1px; background: var(--outline-variant); }
.news__year-count { font-weight: 400; color: var(--on-surface-variant); }

.news__toggle { margin-top: var(--s-3); }

.news__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
}
.news__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--outline-variant);
}

.news__item { position: relative; padding-bottom: var(--s-4); }
.news__item:last-child { padding-bottom: 0; }

.news__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--surface-lowest);
  border: 2px solid var(--outline-variant);
}
/* The open call gets the same accent treatment as an "in-progress" milestone
   elsewhere on the site (Group's Recent Milestones dates), so the one active
   item reads as current at a glance against a run of past ones. */
.news__item--open::before { border-color: var(--primary); background: var(--primary); }
.news__item--open .news__date { color: var(--primary-text); font-weight: 600; }

.news__date {
  font-size: var(--text-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}
.news__title { font-size: var(--text-body-lg); font-weight: 600; margin: 2px 0 4px; }
.news__body { color: var(--on-surface-variant); }
.news__link { margin-top: var(--s-1); }

/* ==========================================================================
   About page
   ========================================================================== */

.about { display: grid; gap: var(--s-6); align-items: start; }
@media (min-width: 900px) { .about { grid-template-columns: 240px minmax(0, 1fr); gap: var(--s-8); } }

.about__aside { position: sticky; top: 96px; display: grid; gap: var(--s-2); }
@media (max-width: 899px) { .about__aside { position: static; } }

.about__figure { margin: var(--s-3) 0 var(--s-4); }
.about__figure { max-width: var(--prose-width); }
.about__figure img {
  width: 100%;
  /* The width/height attributes are there to reserve space before load, but
     a definite height would beat aspect-ratio — hence height: auto. */
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: var(--border);
  background: var(--surface);
}

.about__cv {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  padding-block: var(--s-1) var(--s-2);
  border-bottom: var(--border);
  font-size: var(--text-label);
  font-weight: 500;
}
.about__cv:hover { color: var(--primary-text); }

.link-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.link-list a {
  display: flex;
  align-items: center;
  gap: var(--s-1);
  padding: 6px 0;
  font-size: var(--text-label);
  color: var(--on-surface-variant);
  transition: color var(--transition);
}
.link-list a:hover { color: var(--primary-text); }

.prose { display: grid; gap: var(--s-2); max-width: var(--prose-width); }
.prose p { color: var(--on-surface-variant); font-size: var(--text-body); line-height: 1.7; }
.prose strong { color: var(--on-surface); font-weight: 600; }

.about__office {
  margin-top: var(--s-1);
  padding-top: var(--s-2);
  border-top: var(--border);
  font-size: var(--text-caption);
  line-height: 1.7;
  color: var(--on-surface-variant);
}

.subsection { margin-top: var(--s-6); }
.subsection__title {
  font-size: var(--text-headline-sm);
  font-weight: 600;
  padding-bottom: var(--s-1);
  border-bottom: 1px solid var(--on-surface);
}

.rows { list-style: none; margin: 0; padding: 0; }
.row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-3);
  padding-block: var(--s-2);
  border-bottom: var(--border);
}
.row__primary { font-family: var(--font-display); font-weight: 600; font-size: var(--text-body); }
.row__secondary { font-size: var(--text-label); color: var(--on-surface-variant); }
.row__meta { font-size: var(--text-caption); color: var(--on-surface-variant); white-space: nowrap; }
.row__meta--accent { color: var(--primary-text); font-weight: 500; }
.row--marked .row__primary::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--outline-variant);
  margin-right: var(--s-1);
  vertical-align: middle;
}
/* Education is listed highest-degree-first, so the accent marks the terminal
   degree. Decorative only — the text carries the meaning. */
.row--marked:first-child .row__primary::before { background: var(--primary); }

/* Personal notes on the about page. */
.notes__lede {
  margin-top: var(--s-2);
  color: var(--on-surface-variant);
  font-size: var(--text-label);
}
.note {
  padding-block: var(--s-3);
  border-bottom: var(--border);
}
.note:last-child { border-bottom: 0; }
.note__date {
  font-size: var(--text-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}
.note__title {
  margin-top: 4px;
  font-size: var(--text-body-lg);
  font-weight: 600;
}
.note__body {
  margin-top: 6px;
  color: var(--on-surface-variant);
  line-height: 1.7;
}

/* ==========================================================================
   Publications
   ========================================================================== */

.pubs__head { display: grid; gap: var(--s-3); align-items: end; margin-bottom: var(--s-3); }
@media (min-width: 900px) {
  .pubs__head { grid-template-columns: auto minmax(0, 1fr); }
  .pubs__head .filters { justify-content: flex-end; }
}

.pubs__title { font-size: var(--text-headline); font-weight: 600; letter-spacing: -0.01em; }

.legend {
  margin-top: 6px;
  font-size: var(--text-caption);
  color: var(--on-surface-variant);
}

.chip__n {
  font-variant-numeric: tabular-nums;
  opacity: 0.6;
  font-size: var(--text-caption);
}

.interest { display: grid; gap: var(--s-2); align-content: start; }
.interest__title {
  display: flex;
  align-items: center;
  gap: var(--s-1);
  font-size: var(--text-title);
  font-weight: 600;
  padding-bottom: var(--s-1);
  border-bottom: var(--border);
}

.keypapers { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.keypapers__label {
  font-size: var(--text-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-bottom: 2px;
}
.keypapers a {
  font-size: var(--text-label);
  color: var(--primary-text);
  border-bottom: 1px solid transparent;
}
.keypapers a:hover { border-bottom-color: var(--primary); }

.filters { display: flex; flex-wrap: wrap; gap: var(--s-2); align-items: center; }

.chips { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.chip {
  border: 0;
  background: transparent;
  padding: 4px 0;
  font-size: var(--text-label);
  font-weight: 500;
  color: var(--on-surface-variant);
  border-bottom: 1px solid transparent;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}
.chip:hover { color: var(--on-surface); }
.chip[aria-pressed="true"] { color: var(--primary-text); border-bottom-color: var(--primary); }

.field {
  display: flex;
  align-items: center;
  gap: var(--s-1);
  padding: 7px 12px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius);
  background: var(--surface-lowest);
  color: var(--on-surface-variant);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.field:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 12%, transparent);
}
.field input, .field select {
  border: 0;
  background: transparent;
  font: inherit;
  font-size: var(--text-label);
  color: var(--on-surface);
  outline: none;
  min-width: 0;
}
.field input { width: 26ch; max-width: 46vw; }
.field input::placeholder { color: var(--on-surface-variant); }

/* On a phone the filter row stacks: chips wrap, year and search share a line,
   and the search field takes whatever is left instead of clipping itself. */
@media (max-width: 700px) {
  .filters { width: 100%; align-items: stretch; }
  .filters .chips { width: 100%; }
  .filters .field { flex: 1 1 auto; }
  .field input { width: 100%; max-width: none; }
}

/* Below ~480px the year select and the search box cannot share a line without
   the search box clipping its own placeholder, so give search its own row. */
@media (max-width: 480px) {
  .filters .field:last-child { flex: 1 1 100%; }
}

.pubs__count {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  font-size: var(--text-caption);
  color: var(--on-surface-variant);
  padding-block: var(--s-1);
  border-top: 2px solid var(--on-surface);
}

.pubs__clear {
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--primary-text);
}
.pubs__clear:hover { text-decoration: underline; text-underline-offset: 3px; }
.pubs__clear[hidden] { display: none; }

.pubs__list { list-style: none; margin: 0; padding: 0; }

/* The full list is long, so it lives in its own scrollport. The count row and
   the filters stay outside it and remain visible while you scroll. */
.pubs__scrollwrap { position: relative; }
.pubs__scroll {
  max-height: min(34rem, 78vh);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: var(--s-2);
  /* Native scrollbars only. Forcing a classic bar here (via scrollbar-gutter
     plus a custom scrollbar-color) promotes the scroller to its own paint
     layer, and inline SVG inside it stops being painted. The bottom fade
     below is the affordance that does not depend on the OS scrollbar. */
}
.pubs__scroll::-webkit-scrollbar { width: 10px; }
.pubs__scroll::-webkit-scrollbar-track {
  background: color-mix(in srgb, var(--outline-variant) 34%, transparent);
  border-radius: 999px;
}
.pubs__scroll::-webkit-scrollbar-thumb {
  background: var(--outline-variant);
  border-radius: 999px;
  border: 2px solid var(--surface);
}
.pubs__scroll::-webkit-scrollbar-thumb:hover { background: var(--outline); }
.pubs__scroll:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.pubs__scroll .pub:last-child { border-bottom: 0; }

/* Fade the last line so it reads as "there is more below", not "the end". */
.pubs__scrollwrap::after {
  content: "";
  position: absolute;
  left: 0;
  right: 14px;
  bottom: 0;
  height: 44px;
  pointer-events: none;
  background: linear-gradient(to bottom, transparent, var(--surface));
}

.pubs__list--selected .pub:last-child { border-bottom: 0; }

.pub {
  display: grid;
  gap: 6px;
  padding-block: var(--s-3);
  border-bottom: var(--border);
}
.pub[hidden] { display: none; }
.pub { scroll-margin-top: 96px; transition: background 400ms ease; border-radius: var(--radius); }
.pub--flash { background: color-mix(in srgb, var(--primary) 10%, transparent); }

.pub__authors sup { font-size: 0.7em; color: var(--primary-text); }

.pub__title { font-size: var(--text-body-lg); font-weight: 600; line-height: 1.4; }
.pub__title a { border-bottom: 1px solid transparent; transition: border-color var(--transition), color var(--transition); }
.pub__title a:hover { color: var(--primary-text); border-bottom-color: var(--primary-text); }
.pub__authors { font-size: var(--text-label); color: var(--on-surface-variant); }
.pub__authors strong { color: var(--on-surface); font-weight: 600; }
.pub__venue {
  font-size: var(--text-caption);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}
.pub__note {
  color: var(--primary-text);
  font-weight: 600;
}
.pub__links { display: flex; flex-wrap: wrap; gap: var(--s-2); margin-top: 4px; }
.pub__link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: var(--text-caption);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--primary-text);
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}
.pub__link:hover { text-decoration: underline; text-underline-offset: 3px; }
.pub__link--muted { color: var(--on-surface-variant); }

.empty {
  padding: var(--s-6) 0;
  color: var(--on-surface-variant);
  font-size: var(--text-body);
}
.empty[hidden] { display: none; }

/* Cite dialog */
.dialog {
  border: var(--border);
  border-radius: var(--radius-lg);
  padding: 0;
  width: min(640px, calc(100vw - 32px));
  background: var(--surface-lowest);
  color: var(--on-surface);
}
.dialog::backdrop { background: rgb(0 0 0 / 45%); backdrop-filter: blur(2px); }
.dialog__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  padding: var(--s-2) var(--s-3);
  border-bottom: var(--border);
}
.dialog__title { font-size: var(--text-body); font-weight: 600; }
.dialog__body { padding: var(--s-3); }
.dialog__body pre {
  margin: 0;
  padding: var(--s-2);
  background: var(--surface-low);
  border: var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}
.dialog__foot { display: flex; justify-content: flex-end; gap: var(--s-1); padding: 0 var(--s-3) var(--s-3); }

/* ==========================================================================
   Group page
   ========================================================================== */

.group-layout { display: grid; gap: var(--s-6); align-items: start; }
@media (min-width: 1000px) { .group-layout { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: var(--s-6); } }

.members {
  display: grid;
  gap: var(--s-2);
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  list-style: none;
  margin: 0;
  padding: 0;
}

.member {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-2);
  border: var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-lowest);
}
.member--open { border-style: dashed; }

.avatar {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: 999px;
  background: var(--primary-container);
  color: var(--on-primary-container);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-label);
}

.member__name { font-family: var(--font-display); font-weight: 600; font-size: var(--text-body); }
.member__role { font-size: var(--text-caption); color: var(--primary-text); font-weight: 500; }
.member__focus { font-size: var(--text-caption); color: var(--on-surface-variant); }

.panel {
  padding: var(--s-3);
  border: var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.panel + .panel { margin-top: var(--s-3); }
.panel__title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-1);
  font-size: var(--text-title);
  font-weight: 600;
  padding-bottom: var(--s-1);
  margin-bottom: var(--s-2);
  border-bottom: var(--border);
}

/* The recruiting panel has to win against everything else in the sidebar. */
.panel--feature {
  background: color-mix(in srgb, var(--primary) 7%, var(--surface-lowest));
  border-color: color-mix(in srgb, var(--primary) 35%, transparent);
  border-left: 3px solid var(--primary);
}
.panel--feature .panel__title { border-bottom-color: color-mix(in srgb, var(--primary) 30%, transparent); }

.panel__badge {
  flex: none;
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--primary-text);
  color: var(--on-primary);
}

.opening + .opening { margin-top: var(--s-3); padding-top: var(--s-3); border-top: var(--border); }
.opening__date {
  font-size: var(--text-caption);
  letter-spacing: 0.06em;
  color: var(--primary-text);
  font-weight: 600;
}
.opening__title {
  margin-top: 2px;
  font-size: var(--text-body);
  font-weight: 600;
  line-height: 1.35;
}
.opening__meta { margin: var(--s-2) 0 0; display: grid; gap: 6px; }
/* 7rem clears the longest label ("Prerequisite") at this size; below that it
   collides with the value in the narrow sidebar column. */
.opening__meta > div { display: grid; grid-template-columns: 7rem minmax(0, 1fr); gap: var(--s-1); }
.opening__meta dt {
  font-size: var(--text-caption);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}
.opening__meta dd {
  margin: 0;
  font-size: var(--text-label);
  line-height: 1.5;
  color: var(--on-surface);
}

.milestones { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s-2); }
.milestone { position: relative; padding-left: var(--s-2); }
.milestone::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--primary);
}
.milestone__date {
  font-size: var(--text-caption);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary-text);
  font-weight: 600;
}
.milestone__body { font-size: var(--text-label); color: var(--on-surface-variant); }

.alumni { list-style: none; margin: 0; padding: 0; }
.alumni li {
  display: grid;
  gap: 2px var(--s-2);
  padding-block: var(--s-2);
  border-bottom: var(--border);
}
@media (min-width: 480px) { .alumni li { grid-template-columns: 130px minmax(0, 1fr); } }
.alumni li:last-child { border-bottom: 0; padding-bottom: 0; }
.alumni__name { font-size: var(--text-label); font-weight: 600; }
.alumni__now { font-size: var(--text-label); color: var(--on-surface-variant); }

.pubcard { display: grid; gap: var(--s-2); padding: var(--s-3); border: var(--border); border-radius: var(--radius-lg); background: var(--surface-lowest); }
.pubcard + .pubcard { margin-top: var(--s-2); }
.pubcard__title { font-size: var(--text-title); font-weight: 600; line-height: 1.4; }
.pubcard__title--hinted { position: relative; }

.hint-trigger {
  cursor: help;
  border-bottom: 1px dotted var(--outline);
}
.hint-trigger:hover { border-bottom-color: var(--primary); }

.hint {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  z-index: 30;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
  padding: var(--s-2);
  border: var(--border);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius);
  background: var(--surface-lowest);
  box-shadow: 0 12px 32px rgb(0 0 0 / 14%);
  font-family: var(--font-body);
  font-size: var(--text-label);
  font-weight: 400;
  line-height: 1.6;
  color: var(--on-surface-variant);
}
/* :focus (not :focus-visible) so a tap on touch devices reveals it too. */
.hint-trigger:hover + .hint,
.hint-trigger:focus + .hint,
.hint:hover {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.pubcard__authors { font-size: var(--text-label); color: var(--on-surface-variant); }
.pubcard__venue { font-size: var(--text-label); font-style: italic; color: var(--on-surface-variant); }

/* An intro line that tracks the width of the block it introduces rather than
   the reading measure — used where the block below is a figure grid. */
.lede--wide { max-width: none; }

.directions__lede {
  margin-top: calc(-1 * var(--s-2));
  margin-bottom: var(--s-3);
}

/* Current directions — four small figures in a 2x2 grid. */
.directions {
  display: grid;
  gap: var(--s-3);
  grid-template-columns: 1fr;
}
@media (min-width: 760px) { .directions { grid-template-columns: repeat(2, 1fr); } }

.direction {
  display: grid;
  gap: var(--s-2);
  align-content: start;
  padding: var(--s-3);
  border: var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-lowest);
}
.direction__fig {
  padding: var(--s-2);
  border-radius: var(--radius);
  background: var(--surface);
}
.direction__fig svg { width: 100%; height: auto; }
.direction__title {
  font-size: var(--text-title);
  font-weight: 600;
  line-height: 1.3;
}
.direction__caption {
  font-size: var(--text-label);
  line-height: 1.6;
  color: var(--on-surface-variant);
}

/* Figure primitives — every colour comes from the theme so the diagrams
   follow light/dark without a second copy. */
.fig-t { fill: var(--on-surface); font-family: var(--font-body); font-size: 11px; }
.fig-b { fill: var(--on-surface); font-family: var(--font-display); font-size: 14px; font-weight: 600; }
.fig-c { fill: var(--on-surface-variant); font-family: var(--font-body); font-size: 10px; }
.fig-c--warn { fill: var(--error); }
.fig-chip { fill: var(--surface-container); stroke: var(--outline-variant); }
.fig-box { fill: color-mix(in srgb, var(--primary) 14%, transparent); stroke: var(--primary); stroke-width: 1.2; }
.fig-edge { stroke: var(--outline); stroke-width: 1.1; }
.fig-arrowhead { fill: var(--outline); }
.fig-ans { stroke-width: 1.2; fill: var(--surface-container); stroke: var(--outline-variant); }
.fig-ans--0 { fill: color-mix(in srgb, var(--primary) 18%, transparent); stroke: var(--primary); }
.fig-ans--1 { fill: color-mix(in srgb, var(--error) 14%, transparent); stroke: var(--error); }
.fig-ans--2 { fill: color-mix(in srgb, var(--outline) 18%, transparent); stroke: var(--outline); }
.fig-zero { stroke: var(--outline-variant); stroke-width: 1; stroke-dasharray: 3 3; }
.fig-axis { stroke: var(--outline-variant); stroke-width: 1; }
.fig-ci { stroke-width: 2; stroke-linecap: round; stroke: var(--outline); }
.fig-ci--accent { stroke: var(--primary); }
.fig-ci--warn { stroke: var(--error); }
.fig-dot { fill: var(--outline); }
.fig-dot--accent { fill: var(--primary); }
.fig-dot--warn { fill: var(--error); }
.fig-area { stroke: none; }
.fig-area--data { fill: color-mix(in srgb, var(--primary) 16%, transparent); }
.fig-area--target { fill: color-mix(in srgb, var(--error) 12%, transparent); }
.fig-line { stroke-width: 1.6; }
.fig-line--data { stroke: var(--primary); }
.fig-line--target { stroke: var(--error); stroke-dasharray: 4 3; }
.fig-cell { fill: var(--surface-container); stroke: var(--outline-variant); stroke-width: 0.8; }
.fig-cell--obs { fill: var(--primary); stroke: var(--primary); }
.fig-cell--target { fill: color-mix(in srgb, var(--error) 55%, transparent); stroke: var(--error); stroke-width: 1.4; }

/* Solutions hero figures */
.fig-curve { fill: none; stroke-linecap: round; }
.fig-curve--pred { stroke: var(--outline); stroke-width: 2; }
.fig-curve--dec { stroke: var(--error); stroke-width: 2.5; }
.fig-curve--struct { stroke: var(--primary); stroke-width: 2.5; }
.fig-band { fill: color-mix(in srgb, var(--primary) 24%, transparent); }
.fig-mark--pred { fill: var(--outline); }
.fig-mark--dec { fill: var(--error); }
.fig-mark--struct { fill: var(--primary); }

.fig-pill { fill: var(--surface-container); stroke: var(--outline-variant); stroke-width: 0.8; }
.fig-pill--best { fill: color-mix(in srgb, var(--primary) 16%, var(--surface-lowest)); stroke: var(--primary); }
.fig-pill--pick { fill: color-mix(in srgb, var(--error) 12%, var(--surface-lowest)); stroke: var(--error); }
.fig-link { stroke: var(--outline-variant); stroke-width: 1.2; stroke-linecap: round; }
.fig-link--best { stroke: var(--primary); stroke-width: 2.2; }
.fig-link--pick { stroke: var(--error); stroke-width: 2.2; }
.fig-bar { fill: var(--outline-variant); }
.fig-bar--best { fill: var(--primary); }
.fig-bar--pick { fill: var(--error); }

/* ==========================================================================
   CausalAI page
   ========================================================================== */

.co-hero {
  display: grid;
  gap: var(--s-6);
  align-items: center;
  /* Bottom padding is smaller because the figure row below closes the block. */
  padding-block: clamp(40px, 7vw, 72px) var(--s-4);
}

.hero-figures {
  display: grid;
  gap: var(--s-3);
  padding-bottom: clamp(40px, 7vw, 72px);
}
@media (min-width: 760px) { .hero-figures { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .co-hero { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); } }

.co-hero__title {
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.co-hero__title .accent { color: var(--primary); }
.co-hero__body { color: var(--on-surface-variant); font-size: var(--text-body-lg); max-width: 52ch; }

.figure {
  margin: 0;
  border: var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-lowest);
  padding: var(--s-3);
  overflow: hidden;
}
.figure svg { width: 100%; height: auto; }
.figure figcaption {
  margin-top: var(--s-2);
  font-size: var(--text-caption);
  color: var(--on-surface-variant);
  text-align: center;
}

/* Diagram-specific tokens so the SVG follows the theme */
.dag-node { fill: var(--primary); }
.dag-edge { stroke: var(--primary); }
.nn-node { fill: none; stroke: var(--outline-variant); }
.nn-edge { stroke: color-mix(in srgb, var(--outline-variant) 60%, transparent); }
.dg-label { fill: var(--on-surface-variant); font-family: var(--font-body); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }
.dg-arrow { fill: var(--outline); }

/* Closing company block on the solutions page. This is the page's call to
   action, so it spans the full container like the card grids above it and
   carries more visual weight than an ordinary panel. */
.company {
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid color-mix(in srgb, var(--primary) 38%, transparent);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 140% at 100% 0%, color-mix(in srgb, var(--primary) 12%, transparent), transparent 60%),
    color-mix(in srgb, var(--primary) 6%, var(--surface-lowest));
  box-shadow: 0 10px 30px color-mix(in srgb, var(--primary) 10%, transparent);
}
.company__eyebrow {
  font-size: var(--text-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary-text);
  font-weight: 600;
}
.company__title {
  margin-top: 6px;
  font-size: var(--text-headline);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.company__tm {
  font-size: 0.42em;
  font-weight: 600;
  vertical-align: super;
  margin-left: 2px;
  letter-spacing: 0;
}
.company__body {
  display: grid;
  gap: var(--s-2);
  margin-top: var(--s-2);
  max-width: 78ch;
  font-size: var(--text-body-lg);
  line-height: 1.65;
  color: var(--on-surface-variant);
}
.company__cta { margin-top: var(--s-3); }
.btn--lg {
  padding: 14px 26px;
  font-size: var(--text-body);
}
.company__note {
  margin-top: var(--s-2);
  padding: var(--s-1) var(--s-2);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--error) 8%, transparent);
  color: var(--error);
  font-size: var(--text-caption);
  font-family: var(--font-mono);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer { border-top: var(--border); background: var(--surface); }
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3) var(--s-4);
  padding-block: var(--s-4);
}
.footer__brand { font-family: var(--font-display); font-weight: 600; font-size: var(--text-body-lg); }
.footer__links { display: flex; flex-wrap: wrap; gap: var(--s-3); list-style: none; margin: 0; padding: 0; }
.footer__links a { font-size: var(--text-label); color: var(--on-surface-variant); }
.footer__links a:hover { color: var(--primary-text); }
.footer__copy { font-size: var(--text-caption); color: var(--on-surface-variant); }

/* ==========================================================================
   Preferences
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .header, .mobile-nav, .footer, .filters, .pubs__count { display: none !important; }
  body { background: #fff; color: #000; }
  .card, .panel, .pubcard { break-inside: avoid; }
}