/* ============================================================
   fablessBio — stylesheet
   Concept: "fabless for biology" — technical / terminal aesthetic
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --bg:        #F4F5F2;
  --bg-1:      #FFFFFF;
  --bg-2:      #FFFFFF;
  --line:      #E2E4DF;
  --line-2:    #CDD0CA;
  --text:      #16181B;
  --text-dim:  #555A60;
  --text-mute: #888D92;
  --accent:    #0E9163;
  --accent-dim:#2E8E64;
  --on-accent: #FFFFFF;
  --logo-filter: grayscale(1) opacity(.75);
  --lime:      #15A35C;
  --orange:    #E0661B;

  --maxw: 1180px;
  --pad: clamp(1.25rem, 4vw, 3rem);
  --gutter: clamp(1.25rem, 4vw, 3rem);

  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body:    "Inter", system-ui, -apple-system, sans-serif;
  --font-mono:    "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;

  --eyebrow: 0.72rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Dark theme ---------- */
:root[data-theme="dark"] {
  --bg:        #0A0B0D;
  --bg-1:      #101216;
  --bg-2:      #16181D;
  --line:      #23262D;
  --line-2:    #31353E;
  --text:      #ECEDEF;
  --text-dim:  #9DA1AB;
  --text-mute: #686C76;
  --accent:    #6FE3B6;
  --accent-dim:#3FA882;
  --on-accent: #06140E;
  --logo-filter: grayscale(1) brightness(1.6) contrast(.9);
  --lime:      #76E6A6;
  --orange:    #FF9E55;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.08; letter-spacing: -0.02em; font-family: var(--font-display); }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: var(--accent); color: var(--on-accent); }

html { transition: none; }
body { transition: background-color .3s var(--ease), color .3s var(--ease); }

/* ---------- Layout primitives ---------- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad); }
.skip {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--accent); color: #06140E; padding: .6rem 1rem;
  font-family: var(--font-mono); font-size: .8rem;
}
.skip:focus { left: 1rem; top: 1rem; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--eyebrow);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-mute);
  display: inline-flex;
  align-items: center;
  gap: .6rem;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--accent-dim);
}

/* ---------- Header / nav ---------- */
.site-head {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.18rem;
  letter-spacing: -0.02em;
  display: inline-flex; align-items: baseline; gap: 0;
}
.brand .em { color: var(--accent); font-style: italic; font-weight: 500; }
.brand .tld { color: var(--text-mute); font-family: var(--font-mono); font-size: .62rem; letter-spacing: .06em; margin-left: .5rem; transform: translateY(-.4em); }

.nav-links { display: flex; align-items: center; gap: clamp(1rem, 3vw, 2.4rem); }
.nav-links a {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .02em;
  color: var(--text-dim);
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .3rem 0;
  transition: color .25s var(--ease);
}
.nav-links a::before {
  content: "";
  width: 8px; height: 8px;
  border: 1px solid var(--line-2);
  transition: background .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::before { background: var(--accent); border-color: var(--accent); transform: rotate(45deg); }
.nav-links a[aria-current="page"] { color: var(--text); }
.nav-links a[aria-current="page"]::before { background: var(--accent-dim); border-color: var(--accent-dim); }

.nav-toggle { display: none; }

/* ---------- Theme toggle ---------- */
.nav-cluster { display: flex; align-items: center; gap: clamp(1rem, 3vw, 2.2rem); }
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; flex: 0 0 auto;
  border: 1px solid var(--line-2); background: none; color: var(--text-dim);
  cursor: pointer; padding: 0;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}
.theme-toggle:hover { color: var(--text); border-color: var(--accent); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.theme-toggle .ic { display: block; }
.theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: block; }

/* ---------- Genome stream (signature, multi-line) ---------- */
.genome {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg-1), var(--bg));
  overflow: hidden;
  font-family: var(--font-mono);
}
.genome-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: .6rem .9rem; border-bottom: 1px solid var(--line);
  font-size: .66rem; letter-spacing: .18em; text-transform: uppercase; color: var(--text-mute);
}
.genome-bar .five { color: var(--accent-dim); flex: 0 0 auto; }
.genome-bar .label { flex: 1 1 auto; text-align: center; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.genome-bar .live { display: inline-flex; align-items: center; gap: .55rem; flex: 0 0 auto; color: var(--accent-dim); }
.genome-bar .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: pulse 1.7s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: .35; transform: scale(.8); } 50% { opacity: 1; transform: scale(1.1); } }
.genome-body { position: relative; padding: .55rem 0; }
.genome-body::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(90deg, transparent 78%, var(--bg) 100%); }
.genome-row {
  display: flex; align-items: center; gap: 1rem; padding: .04rem .9rem;
  white-space: nowrap; overflow: hidden;
  font-size: .84rem; line-height: 1.75; letter-spacing: .2em; color: var(--text-mute);
}
.genome-row .pos { flex: 0 0 auto; width: 6ch; text-align: right; color: var(--accent-dim); opacity: .7; font-size: .62rem; letter-spacing: .06em; }
.genome-row .strand { flex: 1 1 auto; overflow: hidden; }
.genome-row .strand .hi { color: var(--accent); }
.genome-row .strand .head { color: var(--text); }
@media (max-width: 520px) {
  .genome-row { font-size: .76rem; letter-spacing: .14em; }
  .genome-row .pos { display: none; }
  .genome-bar .label { display: none; }
}

/* ---------- Hero ---------- */
.hero { padding-top: clamp(3.5rem, 9vw, 7rem); padding-bottom: clamp(2.5rem, 6vw, 4.5rem); }
.hero h1 {
  font-size: clamp(2.5rem, 6.4vw, 5.1rem);
  max-width: 16ch;
  margin-top: 1.6rem;
}
.hero h1 .em { color: var(--accent); font-style: italic; font-weight: 500; }
.hero-sub {
  margin-top: 1.8rem;
  max-width: 56ch;
  color: var(--text-dim);
  font-size: clamp(1.05rem, 1.7vw, 1.28rem);
  line-height: 1.6;
}
.hero-actions { margin-top: 2.4rem; display: flex; flex-wrap: wrap; gap: 1rem 1.6rem; align-items: center; }

.btn {
  font-family: var(--font-mono);
  font-size: .82rem; letter-spacing: .04em;
  display: inline-flex; align-items: center; gap: .6rem;
  padding: .8rem 1.3rem;
  border: 1px solid var(--line-2);
  color: var(--text);
  transition: border-color .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
}
.btn .arr { transition: transform .25s var(--ease); }
.btn:hover { border-color: var(--accent); }
.btn:hover .arr { transform: translateX(4px); }
.btn--solid { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.btn--solid:hover { filter: brightness(1.06); border-color: var(--accent); }
.link-mono {
  font-family: var(--font-mono); font-size: .82rem; color: var(--text-dim);
  display: inline-flex; align-items: center; gap: .5rem;
  border-bottom: 1px solid transparent; transition: color .25s, border-color .25s;
}
.link-mono:hover { color: var(--accent); border-color: var(--accent-dim); }

/* ---------- Section scaffold ---------- */
.section { padding-block: clamp(3rem, 7vw, 5.5rem); border-top: 1px solid var(--line); }
.section-head { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 2.5rem; }
.section-head .idx { font-family: var(--font-mono); font-size: .72rem; color: var(--accent-dim); letter-spacing: .1em; }
.section-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); max-width: 22ch; }
.lede { color: var(--text-dim); max-width: 62ch; font-size: 1.12rem; }

/* ---------- Generic grid ---------- */
.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.cell { background: var(--bg); padding: clamp(1.5rem, 3vw, 2.2rem); }
.cell .tag { font-family: var(--font-mono); font-size: .72rem; color: var(--accent-dim); letter-spacing: .12em; text-transform: uppercase; }
.cell h3 { font-size: 1.32rem; margin: .9rem 0 .7rem; letter-spacing: -0.015em; }
.cell p { color: var(--text-dim); font-size: .98rem; line-height: 1.6; }

/* ---------- Feature rows (science) ---------- */
.frow { border-top: 1px solid var(--line); padding-block: clamp(2.2rem, 5vw, 3.4rem); display: grid; grid-template-columns: 0.9fr 1.4fr; gap: clamp(1.5rem, 4vw, 3.5rem); }
.frow:first-of-type { border-top: 0; }
.frow .meta .tag { font-family: var(--font-mono); font-size: .72rem; color: var(--accent-dim); letter-spacing: .12em; text-transform: uppercase; }
.frow .meta h3 { font-size: clamp(1.5rem, 2.8vw, 2rem); margin-top: .8rem; }
.frow .body p { color: var(--text-dim); }
.frow .body p + p { margin-top: 1rem; }
.frow .body ul { margin-top: 1.2rem; display: grid; gap: .7rem; }
.frow .body li { padding-left: 1.4rem; position: relative; color: var(--text-dim); font-size: .98rem; }
.frow .body li::before { content: "—"; position: absolute; left: 0; color: var(--accent-dim); font-family: var(--font-mono); }

/* ---------- Callout / banner ---------- */
.callout {
  border: 1px solid var(--line-2);
  background: linear-gradient(180deg, var(--bg-1), var(--bg));
  padding: clamp(1.6rem, 4vw, 2.6rem);
  display: grid; grid-template-columns: auto 1fr; gap: 1.6rem; align-items: start;
}
.callout .badge {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--accent-dim); padding: .45rem .7rem; white-space: nowrap;
}
.callout h3 { font-size: 1.2rem; margin-bottom: .6rem; }
.callout p { color: var(--text-dim); font-size: .98rem; }

/* ---------- Applications strip ---------- */
.apps { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.6rem; }
.apps span {
  font-family: var(--font-mono); font-size: .8rem; letter-spacing: .04em;
  border: 1px solid var(--line-2); padding: .5rem .9rem; color: var(--text-dim);
}

/* ---------- Logo wall ---------- */
.logo-group + .logo-group { margin-top: 3rem; }
.logo-group h3 { font-family: var(--font-mono); font-weight: 500; font-size: .78rem; letter-spacing: .16em; text-transform: uppercase; color: var(--text-mute); margin-bottom: 1.2rem; letter-spacing:.16em; }
.logos { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.logos.cols-3 { grid-template-columns: repeat(3, 1fr); }
.logo {
  background: var(--bg); padding: 1.7rem 1.4rem; min-height: 140px;
  display: flex; flex-direction: column; justify-content: space-between;
  transition: background .25s var(--ease);
}
.logo:hover { background: var(--bg-1); }
.logo--spacer, .logo--spacer:hover { background: var(--bg); }
.logo .mark {
  /* swappable wordmark — replace with <img> per assets/logos/README.md */
  font-family: var(--font-display); font-weight: 600; font-size: 1.18rem; letter-spacing: -0.02em; color: var(--text);
}
.logo .mark img { max-height: 38px; width: auto; filter: var(--logo-filter); opacity: .85; }
.logo .desc { font-family: var(--font-mono); font-size: .72rem; color: var(--text-mute); line-height: 1.5; letter-spacing: .02em; }

/* ---------- Timeline ---------- */
.timeline { border-top: 1px solid var(--line); }
.tl-item { display: grid; grid-template-columns: 140px 1fr; gap: clamp(1rem,4vw,2.5rem); padding-block: clamp(1.8rem, 4vw, 2.6rem); border-bottom: 1px solid var(--line); }
.tl-item .when { font-family: var(--font-mono); font-size: .95rem; color: var(--accent); letter-spacing: .02em; }
.tl-item h3 { font-size: 1.25rem; margin-bottom: .6rem; }
.tl-item p { color: var(--text-dim); font-size: .98rem; max-width: 60ch; }

/* ---------- Prose (about) ---------- */
.prose { max-width: 68ch; }
.prose p { color: var(--text-dim); font-size: 1.12rem; }
.prose p + p { margin-top: 1.3rem; }
.prose strong { color: var(--text); font-weight: 600; }
.prose a { color: var(--accent); border-bottom: 1px solid var(--accent-dim); }

/* ---------- Wordmark "less" ---------- */
.less {
  font-style: italic;
  font-weight: 500;
  background: linear-gradient(100deg, var(--lime) 0%, var(--orange) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

/* ---------- Split section (copy + molecular accent) ---------- */
.split { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.split-copy .idx { font-family: var(--font-mono); font-size: .72rem; color: var(--accent-dim); letter-spacing: .1em; display: block; margin-bottom: 1rem; }
.split-copy h2 { font-size: clamp(1.8rem, 3.6vw, 2.7rem); max-width: 18ch; }
.split-copy p { color: var(--text-dim); font-size: 1.12rem; margin-top: 1.2rem; max-width: 46ch; }
.split-copy .dmbtl { font-family: var(--font-mono); font-size: .8rem; letter-spacing: .12em; color: var(--text-mute); margin-top: 1.6rem; }
.split-copy ul { margin-top: 1.4rem; display: grid; gap: .7rem; }
.split-copy li { padding-left: 1.4rem; position: relative; color: var(--text-dim); font-size: 1rem; }
.split-copy li::before { content: "—"; position: absolute; left: 0; color: var(--accent-dim); font-family: var(--font-mono); }
.split-copy .link-mono { margin-top: 1.8rem; }
.split-art { position: relative; }
.split-art svg { width: 100%; max-width: 260px; height: auto; display: block; margin-inline: auto; color: var(--accent); }
.split-art .float { animation: floaty 9s ease-in-out infinite; transform-origin: center; }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* molecular accent draw-in */
.draw-stroke { fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 1600; stroke-dashoffset: 1600; transition: stroke-dashoffset 1.8s var(--ease); }
.reveal.in .draw-stroke { stroke-dashoffset: 0; }
.draw-faint { stroke: var(--line-2); stroke-width: 1.1; }
.draw-node { fill: currentColor; opacity: 0; transform: scale(.3); transform-box: fill-box; transform-origin: center;
  transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in .draw-node { opacity: 1; transform: scale(1); }

/* ---------- Footer ---------- */
.site-foot { border-top: 1px solid var(--line); padding-block: clamp(2.5rem, 5vw, 3.5rem); margin-top: 0; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2rem; }
.foot-grid .brand { font-size: 1.3rem; }
.foot-blurb { color: var(--text-mute); font-size: .92rem; max-width: 38ch; margin-top: 1rem; font-family: var(--font-mono); line-height: 1.6; }
.foot-col h4 { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--text-mute); margin-bottom: 1rem; font-weight: 500; }
.foot-col a, .foot-col p { display: block; color: var(--text-dim); font-size: .92rem; padding: .25rem 0; }
.foot-col a:hover { color: var(--accent); }
.foot-bottom { margin-top: 2.6rem; padding-top: 1.4rem; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
.foot-bottom p { font-family: var(--font-mono); font-size: .74rem; color: var(--text-mute); letter-spacing: .04em; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(18px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .7s var(--ease), transform .7s var(--ease); }
.stagger > * { opacity: 0; transform: translateY(16px); }
.stagger.in > * { opacity: 1; transform: none; transition: opacity .6s var(--ease), transform .6s var(--ease); }
.stagger.in > *:nth-child(2) { transition-delay: .07s; }
.stagger.in > *:nth-child(3) { transition-delay: .14s; }
.stagger.in > *:nth-child(4) { transition-delay: .21s; }
.stagger.in > *:nth-child(5) { transition-delay: .28s; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .grid--3 { grid-template-columns: 1fr; }
  .grid--2 { grid-template-columns: 1fr; }
  .frow { grid-template-columns: 1fr; gap: 1rem; }
  .split { grid-template-columns: 1fr; gap: 2rem; }
  .split-art { order: -1; }
  .split-art svg { max-width: 180px; }
  .callout { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 2.2rem; }
  .logos, .logos.cols-3 { grid-template-columns: repeat(2, 1fr); }
  .tl-item { grid-template-columns: 1fr; gap: .4rem; }

  .nav-toggle {
    display: inline-flex; align-items: center; gap: .5rem;
    background: none; border: 1px solid var(--line-2); color: var(--text);
    font-family: var(--font-mono); font-size: .78rem; padding: .45rem .7rem; cursor: pointer;
  }
  .nav-links {
    position: fixed; inset: 64px 0 auto 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: .5rem var(--pad) 1.5rem;
    transform: translateY(-110%); transition: transform .3s var(--ease);
    max-height: calc(100vh - 64px); overflow: auto;
    pointer-events: none; visibility: hidden;
  }
  .nav-links.open { transform: none; pointer-events: auto; visibility: visible; }
  .nav-links a { width: 100%; padding: .9rem 0; border-bottom: 1px solid var(--line); font-size: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; }
  .reveal, .stagger > * { opacity: 1 !important; transform: none !important; transition: none !important; }
  .seq .caret { animation: none; }
}