/* Bio Trends — editorial / Swiss data-viz, following AI-Trends. Palette tuned to the
   logo: cream paper, deep-green brand, coral = emerging/hot, teal = fading/cool. */

:root {
  --paper: #f5f1e7;
  --paper-2: #ece6d6;
  --card: #fffdf9;
  --ink: #1b1a16;
  --muted: #6c6757;
  --line: rgba(27, 26, 22, 0.14);
  --line-soft: rgba(27, 26, 22, 0.08);

  --accent: #d9533a;        /* emerging / hot (logo coral) */
  --accent-ink: #9a3826;
  --cool: #1a8f82;          /* fading / cool (logo teal) */
  --cool-ink: #0f5f56;
  --brand: #1c7a4d;         /* logo green — biology highlight */
  --brand-ink: #145c3a;
  --top: #1b1a16;           /* top / established */

  --text-hero: clamp(2.2rem, 1.3rem + 3vw, 4rem);
  --text-h2: clamp(1.6rem, 1.1rem + 1.8vw, 2.6rem);
  --space-section: clamp(3.5rem, 2.5rem + 4vw, 7rem);

  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, monospace;

  --dur: 240ms;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.08rem);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
.wrap { width: min(1240px, 92vw); margin-inline: auto; }
a { color: inherit; }
em { font-style: italic; }
:focus-visible { outline: 2.5px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* ---------- header ---------- */
.site-head {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in oklab, var(--paper) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
/* Fluid header: brand + nav sit on one line when there's room; as the viewport
   narrows the nav wraps below the brand (and its links wrap among themselves)
   instead of overflowing/clipping. */
.site-head__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.4rem 1rem; min-height: 64px; padding-block: 0.5rem; }
.brand { display: inline-flex; align-items: center; gap: 0.55ch; text-decoration: none; font-weight: 800; letter-spacing: -0.02em; font-size: 1.12rem; flex: 0 0 auto; }
.brand__logo { width: 1.9em; height: 1.9em; display: block; border-radius: 6px; }
.brand__dim { color: var(--muted); font-weight: 600; }
.nav { display: flex; flex-wrap: wrap; gap: 0.4rem clamp(0.9rem, 3vw, 2rem); align-items: center; justify-content: flex-end; font-weight: 600; }
.nav a { text-decoration: none; color: var(--muted); transition: color var(--dur) var(--ease); }
.nav a:hover { color: var(--ink); }
.nav__ext { color: var(--ink); }
/* phones: give the nav its own full-width line, left-aligned with tappable links */
@media (max-width: 640px) {
  .nav { flex-basis: 100%; justify-content: flex-start; gap: 0.35rem 1.25rem; }
  .nav a { padding: 0.3rem 0; }
}

/* ---------- hero ---------- */
.hero { padding: clamp(2.2rem, 1.4rem + 2.5vw, 4rem) 0; border-bottom: 1px solid var(--line); }
.hero__inner { display: grid; grid-template-columns: 1.5fr 1fr; gap: clamp(2rem, 4vw, 4.5rem); align-items: center; }
@media (max-width: 820px) { .hero__inner { grid-template-columns: 1fr; gap: 1.8rem; } }
.eyebrow { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.04em; color: var(--muted); text-transform: uppercase; margin: 0 0 1rem; }
.hero__title { font-size: var(--text-hero); line-height: 1.02; letter-spacing: -0.03em; font-weight: 800; margin: 0 0 1rem; }
.hero__title em { color: var(--accent); margin-right: 0.22em; }
.hero__title .hero__hl { color: var(--brand); }
.hero__lede { font-size: clamp(1rem, 0.95rem + 0.35vw, 1.2rem); max-width: 52ch; color: #2c291f; margin: 0; line-height: 1.5; }
.hero__lede strong { color: var(--ink); }
.hero__panel { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: clamp(1.3rem, 2.5vw, 2rem); }
.hero__stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1.3rem 1.4rem; }
.stat { display: flex; flex-direction: column; }
.stat__num { font-family: var(--mono); font-size: clamp(1.5rem, 1rem + 1.4vw, 2.2rem); font-weight: 700; line-height: 1; letter-spacing: -0.03em; color: var(--brand-ink); }
.stat__label { font-size: 0.75rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; margin-top: 0.45rem; }

/* ---------- sections ---------- */
.section { padding: clamp(2rem, 1.4rem + 2vw, 3.5rem) 0; }
.section--alt { background: var(--paper-2); border-top: 1px solid var(--line); }
.section__head { margin-bottom: clamp(1.6rem, 3vw, 2.8rem); }
.section__title { font-size: var(--text-h2); letter-spacing: -0.03em; font-weight: 800; margin: 0 0 0.4rem; display: flex; align-items: baseline; gap: 0.7ch; }
.section__num { font-family: var(--mono); font-size: 0.5em; color: var(--accent); font-weight: 700; }
.section__hint { color: var(--muted); margin: 0; max-width: 64ch; }

/* ---------- picker (pills) ---------- */
.picker { display: flex; flex-direction: column; gap: 0.9rem; margin-bottom: 2.2rem; }
.picker__group { display: flex; flex-direction: column; gap: 0.45rem; }
.picker__label { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.07em; text-transform: uppercase; color: var(--muted); }
.picker__row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pill {
  font: inherit; font-weight: 700; cursor: pointer;
  border: 1px solid var(--line); background: transparent; color: var(--ink);
  padding: 0.45rem 1rem; border-radius: 999px;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.pill:hover { border-color: var(--ink); transform: translateY(-1px); }
.pill[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
/* many journals -> compact mono "cards" */
.pill--journal { font-family: var(--mono); font-weight: 600; font-size: 0.76rem; padding: 0.3rem 0.7rem; border-radius: 8px; }
.picker__row--periods .pill { font-family: var(--mono); font-weight: 600; }

/* ---------- trend panel (cols + chart) ---------- */
.trend-panel { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(1.2rem, 3vw, 2.4rem); align-items: start; }
@media (max-width: 860px) { .trend-panel { grid-template-columns: 1fr; } }
.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
@media (max-width: 560px) { .cols { grid-template-columns: 1fr; } }
.col__h { font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; margin: 0 0 0.8rem; padding-bottom: 0.5rem; border-bottom: 2px solid currentColor; display: inline-block; }
.col--top .col__h { color: var(--top); }
.col--emerging .col__h { color: var(--accent); }
.col--fading .col__h { color: var(--cool); }
.rank { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.45rem; counter-reset: r; }
.rank li { counter-increment: r; }
.chip {
  display: flex; align-items: baseline; gap: 0.6ch; width: 100%; text-align: left;
  font: inherit; cursor: pointer; background: var(--card); color: var(--ink);
  border: 1px solid var(--line-soft); border-radius: 10px; padding: 0.55rem 0.7rem;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.chip:hover { transform: translateY(-2px); border-color: var(--line); box-shadow: 0 8px 22px -16px rgba(0,0,0,0.5); }
.chip__rank { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); }
.chip__rank::before { content: counter(r) ". "; }
.chip__name { font-weight: 650; }
.col--emerging .chip:hover { border-color: var(--accent); }
.col--fading .chip:hover { border-color: var(--cool); }

.chart { background: var(--card); border: 1px solid var(--line-soft); border-radius: 14px; padding: clamp(1rem, 2vw, 1.5rem); }
.chart__h { font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin: 0 0 1rem; }
.bar { display: grid; grid-template-columns: 9rem 1fr auto; align-items: center; gap: 0.7rem; padding: 0.28rem 0; cursor: pointer; width: 100%; border: 0; background: none; font: inherit; color: inherit; text-align: left; }
.bar__name { font-size: 0.86rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar__track { height: 12px; background: var(--paper-2); border-radius: 999px; overflow: hidden; }
.bar__fill { height: 100%; background: linear-gradient(90deg, var(--cool), var(--accent)); border-radius: 999px; transform-origin: left; animation: grow var(--dur) var(--ease); }
@keyframes grow { from { transform: scaleX(0.02); } }
.bar__val { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); }
.bar:hover .bar__name { color: var(--accent); }

.empty { color: var(--muted); font-style: italic; padding: 1rem 0; }

/* ---------- pinned topic highlight ---------- */
.highlight {
  margin-top: 1.4rem;
  display: grid; grid-template-columns: minmax(11rem, 15rem) 1fr; gap: clamp(1rem, 2.5vw, 2rem);
  align-items: stretch;
  background: linear-gradient(180deg, color-mix(in oklab, var(--brand) 9%, var(--card)), var(--card));
  border: 1px solid color-mix(in oklab, var(--brand) 32%, var(--line));
  border-left: 4px solid var(--brand);
  border-radius: 14px; padding: clamp(1rem, 2vw, 1.5rem);
}
.highlight[hidden] { display: none; }
@media (max-width: 760px) { .highlight { grid-template-columns: 1fr; } }

.highlight__lead { display: flex; flex-direction: column; gap: 0.15rem; min-width: 0; }
.highlight__pin { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--brand-ink); margin: 0; }
.highlight__name { align-self: flex-start; font: inherit; font-size: 1.25rem; font-weight: 750; line-height: 1.15; color: var(--ink); background: none; border: 0; padding: 0.2rem 0 0; cursor: pointer; text-align: left; transition: color var(--dur) var(--ease); }
.highlight__name:hover { color: var(--brand); }
.highlight__scope { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); margin: 0.1rem 0 0; }
.highlight__count { margin: auto 0 0; display: flex; align-items: baseline; gap: 0.45ch; }
.highlight__num { font-size: clamp(2.4rem, 1.5rem + 3vw, 3.6rem); font-weight: 800; line-height: 1; color: var(--brand); font-variant-numeric: tabular-nums; }
.highlight__unit { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); }

.highlight__series { min-width: 0; display: flex; flex-direction: column; gap: 0.6rem; }
.highlight__series-h { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin: 0; }
.highlight__bars { display: flex; align-items: flex-end; gap: 0.55rem; overflow-x: auto; padding-bottom: 0.2rem; min-height: 7.2rem; }
.hbar { flex: 0 0 auto; display: flex; flex-direction: column; align-items: center; gap: 0.3rem; width: 2.6rem; border: 0; background: none; font: inherit; color: inherit; cursor: pointer; }
.hbar__track { height: 5rem; width: 1.4rem; display: flex; align-items: flex-end; background: var(--paper-2); border-radius: 6px; overflow: hidden; }
.hbar__fill { width: 100%; background: color-mix(in oklab, var(--brand) 55%, var(--cool)); border-radius: 6px 6px 0 0; transition: height var(--dur) var(--ease); }
.hbar--active .hbar__fill { background: var(--brand); }
.hbar__val { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.hbar--active .hbar__val { color: var(--brand-ink); font-weight: 700; }
.hbar__lbl { font-family: var(--mono); font-size: 0.62rem; color: var(--muted); white-space: nowrap; }
.hbar--active .hbar__lbl { color: var(--ink); font-weight: 700; }
.hbar:hover .hbar__fill { filter: brightness(1.08); }

/* ---------- filters ---------- */
.filters { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)) 1.4fr; gap: 1rem; margin-bottom: 1.6rem; }
@media (max-width: 760px) { .filters { grid-template-columns: 1fr 1fr; } .field--grow { grid-column: 1 / -1; } }
.field { display: flex; flex-direction: column; gap: 0.4rem; min-width: 0; }
.field__label { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.field__input { font: inherit; width: 100%; padding: 0.6rem 0.75rem; border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--ink); transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.field__input:hover { border-color: var(--ink); }
.field__input:focus-visible { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 22%, transparent); }
select.field__input { cursor: pointer; appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%236c6757' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 0.7rem center; padding-right: 1.9rem;
}

.result-meta { font-family: var(--mono); font-size: 0.85rem; color: var(--muted); margin: 0 0 1.2rem; }

/* ---------- paper cards ---------- */
.papers { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; align-items: start; grid-template-columns: repeat(auto-fill, minmax(min(100%, 32rem), 1fr)); }
.paper { background: var(--card); border: 1px solid var(--line-soft); border-radius: 10px; padding: 0.7rem 0.85rem; transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.paper:hover { border-color: var(--line); box-shadow: 0 12px 30px -22px rgba(0,0,0,0.55); }
/* row 1: venue */
.paper__head { display: flex; justify-content: space-between; align-items: baseline; gap: 0.6rem; margin: 0 0 0.3rem; }
.paper__cites { font-family: var(--mono); font-size: 0.76rem; color: var(--accent); white-space: nowrap; }
.paper__venue { font-family: var(--mono); font-size: 0.76rem; color: var(--brand-ink); text-align: right; }
/* row 2: full-width title, max two lines + ellipsis */
.paper__title {
  font-size: 0.98rem; font-weight: 700; letter-spacing: -0.01em; margin: 0; line-height: 1.3;
  display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.paper__title a { color: inherit; text-decoration: none; }
.paper__title a:hover { color: var(--accent); }
/* single line; always reserves one line of height (empty when no authors) */
.paper__authors { color: var(--muted); font-size: 0.8rem; margin: 0.3rem 0 0; min-height: 1.2em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center; margin-top: 0.5rem; }
.tag { font-family: var(--mono); font-size: 0.72rem; padding: 0.2rem 0.55rem; border-radius: 999px; background: var(--paper-2); border: 1px solid var(--line-soft); cursor: pointer; color: inherit; transition: background var(--dur) var(--ease), color var(--dur) var(--ease); }
.tag:hover { background: var(--ink); color: var(--paper); }

.more { text-align: center; margin-top: 1.6rem; }
.btn { font: inherit; font-weight: 700; cursor: pointer; padding: 0.7rem 1.6rem; border-radius: 999px; border: 1px solid var(--ink); background: transparent; color: var(--ink); transition: background var(--dur) var(--ease), color var(--dur) var(--ease); }
.btn:hover { background: var(--ink); color: var(--paper); }
.loading { color: var(--muted); font-family: var(--mono); font-size: 0.85rem; padding: 2rem 0; }

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--line); padding: 2.5rem 0; }
.site-foot__inner { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; color: var(--muted); font-size: 0.9rem; }
.site-foot__inner p { margin: 0; max-width: 62ch; }
.site-foot a { color: var(--ink); }

/* ---------- right-side fast nav (scroll-spy) ---------- */
.sidenav { position: fixed; right: clamp(0.8rem, 2vw, 2rem); top: 50%; transform: translateY(-50%); z-index: 30; display: flex; flex-direction: column; gap: 0.9rem; }
.sidenav a { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--muted); flex-direction: row-reverse; }
.sidenav__dot { width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--muted); background: transparent; transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease); flex: none; }
.sidenav__label { font-size: 0.78rem; font-weight: 600; opacity: 0; transform: translateX(6px); transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease); white-space: nowrap; }
.sidenav a:hover .sidenav__label, .sidenav a:focus-visible .sidenav__label { opacity: 1; transform: translateX(0); }
.sidenav a:hover .sidenav__dot { border-color: var(--ink); }
.sidenav a.active .sidenav__dot { background: var(--accent); border-color: var(--accent); transform: scale(1.25); }
.sidenav a.active .sidenav__label { opacity: 1; transform: translateX(0); color: var(--ink); }
@media (max-width: 1100px) { .sidenav { display: none; } }