/* ==========================================================================
   AIxBio Research Hub — single stylesheet for all four pages.

   Organised as: tokens > base > chrome (header/hero/footer) > per-page
   sections > responsive. Change the tokens in :root to restyle globally.
   ========================================================================== */

/* --- Design tokens -------------------------------------------------------- */

:root {
  --ink: #1E1B16;      /* near-black text */
  --paper: #F7F4EE;    /* page background, warm ivory */
  --paper2: #F1ECE1;   /* secondary panel / tag background */
  --card: #FFFFFF;     /* card surfaces */
  --muted: #6E665A;    /* body / secondary text */
  --faint: #9C9384;    /* tertiary / meta text */
  --hair: #E2DBCB;     /* hairline borders */
  --hair2: #EBE5D7;    /* lighter hairline */
  --acc: #A95A3A;      /* terracotta accent */

  --font-sans: "Hanken Grotesk", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

/* --- Base ----------------------------------------------------------------- */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
}

a { color: var(--acc); }
a:hover { color: var(--ink); }

.mono { font-family: var(--font-mono); }

/* Label text that should reach screen readers but not the page. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 80px; }

/* The landing page runs to a slightly narrower measure than the content pages. */
.wrap.narrow { max-width: 1120px; }
.wrap.reading { max-width: 900px; }

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

header.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 26px 80px;
  max-width: 1180px;
  margin: 0 auto;
}

.logo { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); }
.logo .dot { width: 12px; height: 12px; border-radius: 3px; background: var(--acc); display: inline-block; }
.logo .name { font-size: 16px; font-weight: 700; letter-spacing: -.3px; }
.logo .name span { color: var(--faint); font-weight: 500; }

nav.top-nav { display: flex; gap: 26px; font-size: 14px; color: var(--muted); font-weight: 500; }
nav.top-nav a { color: var(--muted); text-decoration: none; }
nav.top-nav a.active { color: var(--acc); }
nav.top-nav a:hover { color: var(--ink); }

/* --- Hero ----------------------------------------------------------------- */

.hero { padding: 44px 0 30px; border-bottom: 1px solid var(--hair); }
.hero h1 { margin: 0 0 10px; font-size: 36px; line-height: 1.12; letter-spacing: -.8px; font-weight: 700; max-width: 720px; }
.hero p { margin: 0; font-size: 15.5px; line-height: 1.6; color: var(--muted); max-width: 600px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 2.5px;
  color: var(--acc);
  margin-bottom: 16px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 6px; background: var(--acc); }

/* Landing-page hero: centred, larger, no rule beneath. */
.hero.centered { text-align: center; padding: 76px 0 18px; border-bottom: none; }
.hero.centered h1 { margin: 0 auto; font-size: 50px; line-height: 1.08; letter-spacing: -1.2px; max-width: 820px; text-wrap: balance; }
.hero.centered p { margin: 24px auto 0; max-width: 600px; font-size: 17px; }
.hero.centered .eyebrow { margin-bottom: 28px; }
.hero .meta {
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--faint);
}

/* Wider lede on the pages that need one. */
.hero.wide h1 { margin-bottom: 14px; }
.hero.wide p { max-width: 640px; line-height: 1.65; }

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

footer {
  padding: 36px 0 44px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 1px;
  color: var(--faint);
  text-align: center;
  border-top: 1px solid var(--hair);
}
body.landing footer { border-top: none; padding-top: 40px; }

/* ==========================================================================
   Landing page
   ========================================================================== */

.dest-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 44px; }

.dest-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--hair);
  border-radius: 4px;
  padding: 34px 34px 30px;
  min-height: 234px;
  position: relative;
  box-shadow: 0 1px 2px rgba(60, 40, 20, .03);
  transition: all .22s ease;
}
.dest-card:hover {
  border-color: var(--acc);
  box-shadow: 0 10px 30px rgba(60, 40, 20, .08);
  transform: translateY(-3px);
}
.dest-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 26px; }
.dest-num { font-family: var(--font-mono); font-size: 13px; color: var(--acc); letter-spacing: 1px; }
.dest-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--faint);
  border: 1px solid var(--hair);
  border-radius: 100px;
  padding: 4px 11px;
}
.dest-title { font-size: 25px; font-weight: 700; letter-spacing: -.5px; line-height: 1.1; margin-bottom: 12px; }
.dest-blurb { font-size: 14.5px; line-height: 1.55; color: var(--muted); flex: 1; }
.dest-open {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--faint);
  transition: color .2s;
}
.dest-card:hover .dest-open { color: var(--acc); }
.dest-open svg { transition: transform .2s; }
.dest-card:hover .dest-open svg { transform: translateX(4px); }

.suggest {
  margin-top: 20px;
  background: var(--card);
  border: 1px solid var(--hair);
  border-radius: 4px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
  padding: 32px 40px;
}
.suggest h3 { font-size: 20px; font-weight: 700; letter-spacing: -.3px; margin: 0 0 6px; }
.suggest p { font-size: 14.5px; color: var(--muted); line-height: 1.5; max-width: 440px; margin: 0; }
.suggest .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  background: var(--acc);
  color: #fff;
  padding: 14px 24px;
  border-radius: 3px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
.suggest .btn:hover { color: #fff; opacity: .9; }

/* ==========================================================================
   Research database
   ========================================================================== */

.layout { display: grid; grid-template-columns: 250px 1fr; gap: 36px; padding: 32px 0 80px; align-items: start; }
.panel { background: var(--card); border: 1px solid var(--hair); border-radius: 6px; padding: 22px; }

.facet { margin-bottom: 22px; }
.facet:last-of-type { margin-bottom: 0; }
.facet h4 {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 600;
}
/* padding-right keeps the scrollbar off the count numbers when a facet overflows. */
.facet-list { display: flex; flex-direction: column; gap: 7px; max-height: 190px; overflow-y: auto; padding-right: 6px; }
.facet-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}
.facet-item input { accent-color: var(--acc); width: 14px; height: 14px; cursor: pointer; flex: none; }
.facet-item .cnt { margin-left: auto; font-family: var(--font-mono); font-size: 11px; color: var(--faint); }
.facet-item:hover { color: var(--ink); }
.facet-extra { display: none; flex-direction: column; gap: 7px; }
.facet-extra.open { display: flex; }

.link-btn {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--acc);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  margin-top: 4px;
  text-align: left;
}
.link-btn:hover { color: var(--ink); }

.toolbar { display: flex; gap: 12px; align-items: center; margin-bottom: 16px; }
.search-wrap { position: relative; flex: 1; }
.search-wrap svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--faint); }
.search-wrap input {
  width: 100%;
  border: 1px solid var(--hair);
  background: var(--card);
  border-radius: 6px;
  padding: 12px 14px 12px 40px;
  font-size: 14.5px;
  font-family: inherit;
  color: var(--ink);
  outline: none;
}
.search-wrap input:focus { border-color: var(--acc); }

select#sort {
  border: 1px solid var(--hair);
  background: var(--card);
  border-radius: 6px;
  padding: 12px 14px;
  font-size: 13.5px;
  font-family: var(--font-mono);
  color: var(--muted);
  outline: none;
  cursor: pointer;
}

.result-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--faint);
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips:not(:empty) { margin-bottom: 14px; }
.chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--paper2);
  border: 1px solid var(--hair);
  border-radius: 100px;
  padding: 5px 10px 5px 12px;
  font-size: 12.5px;
  color: var(--ink);
}
.chip button { border: none; background: none; color: var(--faint); cursor: pointer; font-size: 14px; line-height: 1; padding: 0; }
.chip button:hover { color: var(--ink); }

.results { display: flex; flex-direction: column; gap: 14px; }

.card { background: var(--card); border: 1px solid var(--hair); border-radius: 6px; padding: 24px 26px; }
.card-top { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 8px; }
.card-title { font-size: 17.5px; font-weight: 700; letter-spacing: -.2px; line-height: 1.3; }
.card-title a { color: var(--ink); text-decoration: none; }
.card-title a:hover { color: var(--acc); }
.type-badge {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--faint);
  border: 1px solid var(--hair);
  border-radius: 100px;
  padding: 4px 10px;
  white-space: nowrap;
}
.card-meta { font-size: 13px; color: var(--muted); margin-bottom: 10px; line-height: 1.5; }
.card-meta .sep { color: var(--faint); margin: 0 6px; }

.abstract { font-size: 13.5px; line-height: 1.6; color: var(--muted); max-height: 42px; overflow: hidden; position: relative; margin-bottom: 10px; }
.abstract.expanded { max-height: none; }
.abstract-toggle {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .8px;
  text-transform: uppercase;
  color: var(--acc);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  margin-bottom: 12px;
}
.abstract-toggle:hover { color: var(--ink); }

.card-bottom { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font-size: 11px; color: var(--muted); background: var(--paper2); border-radius: 100px; padding: 3px 10px; }
.card-link {
  flex: none;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--acc);
  text-decoration: none;
}
.card-link:hover { color: var(--ink); }

.empty { padding: 60px 20px; text-align: center; color: var(--muted); font-size: 15px; border: 1px dashed var(--hair); border-radius: 6px; }

/* Shown only when JavaScript is unavailable. */
.noscript-note { margin-bottom: 16px; }

/* ==========================================================================
   Organisations & newsletters
   ========================================================================== */

section.group { padding: 40px 0; border-bottom: 1px solid var(--hair); }
section.group:last-of-type { border-bottom: none; }
.group h2 { font-size: 22px; font-weight: 700; letter-spacing: -.4px; margin: 0 0 4px; }
.group .sub { font-family: var(--font-mono); font-size: 12px; letter-spacing: .5px; color: var(--faint); margin: 0 0 22px; }

.card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.org-card {
  background: var(--card);
  border: 1px solid var(--hair);
  border-radius: 6px;
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.org-card h3 { margin: 0; font-size: 16px; font-weight: 700; letter-spacing: -.2px; }
.org-card p { margin: 0; font-size: 13.5px; line-height: 1.55; color: var(--muted); flex: 1; }
.org-card a.visit {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--acc);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
}
.org-card a.visit:hover { color: var(--ink); }

/* ==========================================================================
   Recommended resources
   ========================================================================== */

.res-list { display: flex; flex-direction: column; gap: 18px; }
.res-item { display: flex; flex-direction: column; gap: 4px; }
.res-title { font-size: 15.5px; font-weight: 700; letter-spacing: -.2px; line-height: 1.35; display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; }
.res-title a { color: var(--ink); text-decoration: none; }
.res-title a:hover { color: var(--acc); }
.res-source { font-family: var(--font-mono); font-size: 11.5px; color: var(--faint); font-weight: 400; }
.res-desc { font-size: 14px; line-height: 1.55; color: var(--muted); }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 860px) {
  .wrap, header.top { padding-left: 24px; padding-right: 24px; }
  .layout { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .dest-grid { grid-template-columns: 1fr; }
  .suggest { grid-template-columns: 1fr; }
  .hero.centered h1 { font-size: 36px; }
}

/* Below roughly 620px the wordmark and four nav links stop fitting on one
   line and collide. Stack them instead of letting the logo wrap mid-phrase. */
@media (max-width: 620px) {
  header.top { flex-direction: column; align-items: flex-start; gap: 14px; padding-top: 20px; }
  .logo .name { white-space: nowrap; }
  nav.top-nav { flex-wrap: wrap; gap: 8px 18px; }
  .toolbar { flex-wrap: wrap; }
  .search-wrap { flex: 1 1 100%; }
  select#sort { flex: 1 1 100%; }
  .card-bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
}