/* BioAI Lab — site design system (palette 01 · Lab kelly green) */

:root {
  /* Palette */
  --paper: #ffffff;
  --paper-warm: #f3f8ee;
  --paper-warm-2: #e8f1de;
  --ink: #0a1408;
  --ink-soft: #2a3a26;
  --ink-mute: #5a6c54;
  --rule: #d8e3cf;
  --rule-strong: #9bb494;
  --accent: #2ea043;
  --accent-deep: #1b6e30;
  --accent-soft: #cdebd5;
  --accent-ink: #ffffff;

  /* Research themes */
  --theme-genomics:    #2ea043; --theme-genomics-soft:    #cdebd5;
  --theme-llm-agents:  #1f6feb; --theme-llm-agents-soft:  #d1e0fb;
  --theme-ethics:      #f59e0b; --theme-ethics-soft:      #fde6b8;
  --theme-healthcare:  #db2777; --theme-healthcare-soft:  #f8cfe1;

  /* Type */
  --serif: 'Geist', 'Inter Tight', system-ui, sans-serif;
  --sans:  'Geist', 'Inter Tight', system-ui, sans-serif;
  --mono:  'JetBrains Mono', ui-monospace, monospace;

  --max-w: 1280px;
  --pad-x: clamp(24px, 5vw, 80px);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
p { margin: 0 0 1em; text-wrap: pretty; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -0.025em; text-wrap: balance; }

/* ── Utility ──────────────────────────────────────────── */
.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-deep);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--accent);
}
.mono {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  text-transform: uppercase;
}

/* ── Nav ──────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px var(--pad-x);
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--rule);
}
.brand { display: flex; align-items: center; gap: 14px; color: var(--ink); }
.brand__svg { width: 44px; height: 48px; display: block; }
.brand__name {
  font-family: var(--serif); font-weight: 600;
  font-size: 22px; letter-spacing: -0.025em;
}
.navlinks { display: flex; gap: 28px; align-items: center; }
.navlinks a {
  font-size: 15px; color: var(--ink-soft);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color .15s, border-color .15s;
}
.navlinks a:hover { color: var(--accent-deep); }
.navlinks a.is-active { color: var(--ink); border-bottom-color: var(--accent); }
.navlinks a.cta {
  font-size: 13px;
  padding: 9px 18px;
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 999px;
  border: 1px solid var(--accent);
}
.navlinks a.cta:hover { background: var(--accent-deep); color: var(--accent-ink); border-color: var(--accent-deep); }
@media (max-width: 720px) {
  .nav { flex-wrap: wrap; row-gap: 10px; padding-top: 12px; padding-bottom: 12px; }
  .brand__name { font-size: 20px; }
  .navlinks { width: 100%; flex-wrap: nowrap; gap: 18px; overflow-x: auto; scrollbar-width: none; white-space: nowrap; }
  .navlinks::-webkit-scrollbar { display: none; }
  .navlinks a { font-size: 14px; }
  .navlinks a.cta { padding: 6px 14px; }
}

/* ── Footer ───────────────────────────────────────────── */
.footer {
  margin-top: 120px;
  background: var(--ink);
  color: #d3e4cf;
  padding: 64px var(--pad-x) 32px;
}
.footer__inner {
  max-width: var(--max-w); margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}
.footer h4 {
  font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: #a9e0b3; margin-bottom: 14px; font-weight: 500;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer a { color: #d3e4cf; font-size: 15px; }
.footer a:hover { color: #fff; }
.footer__brand { color: #d3e4cf; }
.footer__brand p { max-width: 36ch; font-size: 15px; }
.footer__bottom {
  max-width: var(--max-w); margin: 56px auto 0;
  padding-top: 24px;
  border-top: 1px solid #1c3018;
  display: flex; justify-content: space-between;
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: #6e8868;
}
@media (max-width: 720px) {
  .footer__inner { grid-template-columns: 1fr 1fr; }
}

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 16px; font-weight: 500;
  border: 1px solid transparent;
  transition: background .15s, border-color .15s, color .15s;
  cursor: pointer;
}
.btn--primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn--primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn--ghost:hover { background: var(--accent-soft); }

/* ── Tags ─────────────────────────────────────────────── */
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 9px;
  border: 1px solid var(--rule-strong);
  background: transparent;
  color: var(--ink-soft);
  border-radius: 3px;
}
.tag--theme {
  border-color: var(--theme-c);
  color: var(--theme-c);
}

/* ── Section primitives ───────────────────────────────── */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 96px var(--pad-x);
}
.section--warm { background: var(--paper-warm); max-width: none; padding-left: 0; padding-right: 0; }
.section--warm .section__inner {
  max-width: var(--max-w); margin: 0 auto;
  padding: 96px var(--pad-x);
}
.section-head {
  margin-bottom: 56px;
}
.section-head h2 {
  font-size: clamp(40px, 5vw, 56px);
  line-height: 1.05;
  max-width: 18ch;
}

/* ── Hero ─────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px var(--pad-x) 96px;
  text-align: center;
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(ellipse 90% 60% at 50% 100%, var(--paper-warm), transparent 70%),
    var(--paper);
}
.hero__canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
}
.hero > *:not(canvas) { position: relative; z-index: 1; }
.hero h1 {
  font-size: clamp(48px, 7vw, 88px);
  line-height: 1.0;
  margin: 32px auto 32px;
  max-width: 18ch;
  font-weight: 600;
}
.hero__lede {
  font-size: 21px; line-height: 1.5;
  color: var(--ink-soft);
  max-width: 58ch;
  margin: 0 auto 40px;
}
.hero__actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
@media (max-width: 720px) {
  .hero { padding: 80px var(--pad-x) 64px; }
}

/* Page hero — smaller, left-aligned variant for non-home pages */
.page-hero {
  padding: 80px var(--pad-x) 56px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.page-hero h1 {
  font-size: clamp(40px, 5.4vw, 64px);
  line-height: 1.05;
  margin: 20px 0 24px;
  max-width: 18ch;
  font-weight: 600;
}
.page-hero p {
  font-size: 19px;
  color: var(--ink-soft);
  max-width: 60ch;
}

/* ── PI block (home) ──────────────────────────────────── */
.pi {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 64px;
  align-items: center;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 120px var(--pad-x);
}
.pi__photo {
  width: 100%; aspect-ratio: 4/5;
  object-fit: cover; display: block;
}
.pi h2 { font-size: clamp(40px, 4.8vw, 56px); line-height: 1.05; margin: 20px 0 16px; }
.pi__title { color: var(--ink-soft); font-size: 18px; margin-bottom: 16px; }
.pi p { font-size: 19px; color: var(--ink-soft); max-width: 52ch; }
@media (max-width: 720px) { .pi { grid-template-columns: 1fr; gap: 32px; } }

/* ── Research themes (home table) ─────────────────────── */
.themes-table { display: grid; gap: 0; }
.themes-table__row {
  display: grid;
  grid-template-columns: 80px 260px 1fr;
  gap: 48px;
  align-items: center;
  padding: 40px 0;
  border-top: 1px solid var(--rule);
}
.themes-table__row:last-child { border-bottom: 1px solid var(--rule); }
.themes-table__num {
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: 0.14em;
  color: var(--theme-c);
}
.themes-table__title {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.themes-table__blurb {
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 56ch;
}
@media (max-width: 720px) {
  .themes-table__row { grid-template-columns: 1fr; gap: 8px; padding: 28px 0; }
}

/* ── News timeline ────────────────────────────────────── */
.news-timeline {
  position: relative;
  display: grid;
  gap: 0;
  padding-left: 0;
}
.news-timeline::before {
  content: "";
  position: absolute;
  left: 138px; top: 24px; bottom: 24px;
  width: 1px;
  background: var(--rule-strong);
}
.news-timeline__item {
  display: grid;
  grid-template-columns: 130px 24px 1fr;
  gap: 0;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
}
.news-timeline__item:last-child { border-bottom: none; }
.news-timeline__date {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink-mute);
  letter-spacing: 0.05em;
  padding-top: 4px;
}
.news-timeline__dot {
  width: 11px; height: 11px;
  background: var(--accent);
  border-radius: 50%;
  margin-top: 10px;
  position: relative;
  z-index: 1;
  outline: 4px solid var(--paper-warm);
}
.news-timeline__body { padding-left: 24px; }
.news-timeline__tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin-bottom: 6px;
  display: block;
}
.news-timeline__text {
  font-size: 19px; line-height: 1.5;
  color: var(--ink); margin: 0;
}

/* ── Research page — theme sections + project cards ──── */
.theme-section {
  padding: 80px var(--pad-x);
  border-top: 1px solid var(--rule);
}
.theme-section--alt { background: var(--paper-warm); }
.theme-section__inner { max-width: var(--max-w); margin: 0 auto; }
.theme-section__head {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.theme-section__num {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--theme-c);
  text-transform: uppercase;
}
.theme-section__title {
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 44px);
  line-height: 1.1;
  margin-top: 12px;
  margin-bottom: 18px;
}
.theme-section__blurb {
  font-size: 18px;
  color: var(--ink-soft);
  margin-bottom: 16px;
  max-width: 60ch;
}
.theme-section__topics { display: flex; flex-wrap: wrap; gap: 8px; }

.proj-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.proj-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--theme-c, var(--accent));
  padding: 28px 28px 24px;
  display: flex; flex-direction: column;
  transition: transform .15s, box-shadow .15s;
}
.proj-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -20px rgba(10,20,8,0.18);
}
.proj-card__tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.proj-card__title {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.proj-card__blurb { font-size: 16px; color: var(--ink-soft); margin-bottom: 20px; }
.proj-card__meta {
  display: flex; justify-content: space-between; gap: 12px;
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-mute);
  padding-top: 16px; border-top: 1px solid var(--rule);
  margin-top: auto;
}
.proj-card__lead { color: var(--accent-deep); }
@media (max-width: 720px) {
  .theme-section__head { grid-template-columns: 1fr; gap: 16px; }
  .proj-grid { grid-template-columns: 1fr; }
}

/* ── Team page ────────────────────────────────────────── */
.team-pi {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 64px;
  align-items: center;
  max-width: var(--max-w);
  margin: 0 auto 96px;
  padding: 64px var(--pad-x);
  background: var(--paper-warm);
}
.team-pi__photo { width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.team-pi__name { font-size: 48px; line-height: 1.05; margin: 16px 0 8px; }
.team-pi__role { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-deep); margin-bottom: 16px; }
.team-pi__bio { font-size: 18px; color: var(--ink-soft); max-width: 52ch; margin-bottom: 20px; }
.team-pi__links { display: flex; gap: 12px; }
@media (max-width: 720px) {
  .team-pi { grid-template-columns: 1fr; gap: 24px; padding: 48px var(--pad-x); }
}

.member-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x) 96px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.member-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  display: flex; flex-direction: column;
  transition: transform .15s, box-shadow .15s;
}
.member-card:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -20px rgba(10,20,8,0.15); }
.member-card__photo {
  aspect-ratio: 4 / 5;
  background: var(--paper-warm-2);
  display: grid; place-items: center;
  font-family: var(--serif);
  font-size: 72px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.04em;
}
.member-card__photo--img { width: 100%; object-fit: cover; object-position: center 25%; display: block; }
.member-card__body { padding: 24px 24px 28px; }
.member-card__name { font-size: 22px; margin-bottom: 4px; line-height: 1.2; }
.member-card__role { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-deep); margin-bottom: 14px; }
.member-card__project {
  font-size: 14px;
  font-style: italic;
  color: var(--ink);
  border-left: 2px solid var(--accent);
  padding-left: 12px;
  margin-bottom: 14px;
}
.member-card__bio { font-size: 15px; color: var(--ink-soft); margin-bottom: 16px; }
.member-card__tags { display: flex; gap: 6px; flex-wrap: wrap; }
@media (max-width: 900px) { .member-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .member-grid { grid-template-columns: 1fr; } }

.alumni {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 96px var(--pad-x);
  border-top: 1px solid var(--rule);
}
.alumni h2 { font-size: clamp(32px, 4vw, 44px); margin-bottom: 32px; }
.alumni-list {
  list-style: none; padding: 0; margin: 0;
  border-top: 1px solid var(--rule);
}
.alumni-item {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  gap: 32px; align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 16px;
}
.alumni-item__name { font-family: var(--serif); font-weight: 600; font-size: 20px; }
.alumni-item__role { font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-mute); }
.alumni-item__proj { color: var(--ink-soft); }
@media (max-width: 720px) { .alumni-item { grid-template-columns: 1fr; gap: 4px; } }

/* ── Publications page ────────────────────────────────── */
.pubs-year {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px var(--pad-x);
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 48px;
  align-items: start;
}
.pubs-year__label {
  font-family: var(--serif);
  font-size: 56px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--accent);
  position: sticky; top: 100px;
}
.pubs-year__list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--rule); }
.pubs-year__item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
  font-size: 16px;
}
.pubs-year__type {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.pubs-year__text { line-height: 1.5; }
.pubs-year__tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.pubs-year__status,
.pubs-year__award {
  display: inline-block;
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 1px 7px;
  border-radius: 3px;
  vertical-align: 1px;
  border: 1px solid var(--rule-strong);
  color: var(--ink-mute);
}
.pubs-year__award { border-color: var(--accent); color: var(--accent-deep); background: var(--accent-soft); }
.pubs-year__link {
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent-deep);
  white-space: nowrap;
}
.member-card__links { display: flex; gap: 14px; margin-top: 14px; font-family: var(--mono); font-size: 12px; }
.member-card__links a { color: var(--accent-deep); }
@media (max-width: 720px) {
  .pubs-year { grid-template-columns: 1fr; gap: 16px; }
  .pubs-year__label { position: static; font-size: 40px; }
  .pubs-year__item { grid-template-columns: 1fr; gap: 4px; }
}

/* ── Contact page ─────────────────────────────────────── */
.contact {
  max-width: 920px;
  margin: 0 auto;
  padding: 96px var(--pad-x);
}
.contact h1 {
  font-size: clamp(48px, 6vw, 72px);
  line-height: 1.05;
  margin: 24px 0 32px;
  max-width: 16ch;
}
.contact__lede { font-size: 21px; color: var(--ink-soft); margin-bottom: 56px; max-width: 56ch; }
.contact-block {
  padding: 32px 0;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  align-items: baseline;
}
.contact-block:last-child { border-bottom: 1px solid var(--rule); }
.contact-block__label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
}
.contact-block__body { font-size: 19px; }
.contact-block__body p { margin: 0 0 8px; }
.contact-block a { color: var(--accent-deep); border-bottom: 1px solid var(--accent); padding-bottom: 1px; }
@media (max-width: 720px) {
  .contact-block { grid-template-columns: 1fr; gap: 8px; }
}
.pubs-year__label--range { font-size: 40px; line-height: 1.05; }
@media (max-width: 720px) { .pubs-year__label--range { font-size: 32px; } }
.course-link { display: block; margin-top: 8px; font-family: var(--mono); font-size: 13px; color: var(--accent-deep); text-decoration: underline; text-underline-offset: 3px; }