/* ==========================================================================
   Design tokens — dark lab / futuristic theme
   ========================================================================== */
:root {
  --bg: #060B0A;
  --bg-alt: #0B1412;
  --panel: #0E1917;
  --panel-raised: #122220;
  --ink: #E8F3EF;
  --ink-soft: #9FB6AF;
  --ink-faint: #5C726B;
  --line: rgba(148, 197, 183, 0.14);
  --line-strong: rgba(148, 197, 183, 0.28);

  --accent: #33E0AE;        /* signature teal-green, pulled from the logo */
  --accent-deep: #17B389;
  --accent-bright: #7CFFDA;
  --accent-soft: rgba(51, 224, 174, 0.10);
  --accent-2: #4FC3FF;      /* secondary cyan for contrast/data */
  --accent-2-soft: rgba(79, 195, 255, 0.10);
  --danger: #FF8A65;

  --font-display: 'Chakra Petch', 'IBM Plex Sans', sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', 'SF Mono', monospace;

  --radius-sm: 4px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --container: 1180px;
  --glow: 0 0 24px rgba(51, 224, 174, 0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse 900px 500px at 15% -5%, rgba(51,224,174,0.10), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 10%, rgba(79,195,255,0.07), transparent 55%);
  background-attachment: fixed;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--ink);
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(2.4rem, 4.5vw, 4rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }

p { margin: 0 0 1em; color: var(--ink-soft); }

a { color: var(--accent-bright); text-decoration: none; }
a:hover { text-decoration: underline; }

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.eyebrow::before {
  content: '';
  width: 14px;
  height: 1px;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
  display: inline-block;
}

/* ==========================================================================
   Nav
   ========================================================================== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 11, 10, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--ink);
  letter-spacing: 0.01em;
}

.brand:hover { text-decoration: none; }

.brand-mark {
  height: 36px;
  width: auto;
  flex-shrink: 0;
  filter: drop-shadow(0 0 8px rgba(51, 224, 174, 0.45));
}

.brand-pepti { color: var(--accent); }
.brand-central { color: var(--ink); }

.nav-links { display: flex; gap: 30px; list-style: none; margin: 0; padding: 0; }

.nav-links a {
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.nav-links a.active { color: var(--accent-bright); }
.nav-links a:hover { color: var(--accent-bright); text-decoration: none; }

.nav-shop {
  background: var(--accent);
  color: #04140F !important;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
  box-shadow: 0 0 16px rgba(51,224,174,0.25);
}
.nav-shop:hover { background: var(--accent-bright) !important; color: #04140F !important; box-shadow: 0 0 22px rgba(51,224,174,0.4); }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--ink);
  padding: 8px 10px;
  cursor: pointer;
}
.nav-toggle:hover { border-color: var(--accent); color: var(--accent-bright); }

@media (max-width: 780px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 4px;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--line);
    padding: 14px 32px 22px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; border-bottom: 1px solid var(--line); }
  .nav-links li:last-child a { border-bottom: none; }
  .nav-toggle { display: inline-flex; }
}

/* ==========================================================================
   Chain / molecule motif + lab icons (signature elements)
   ========================================================================== */
.chain-divider { width: 100%; height: 28px; display: block; margin: 0 auto; }
.chain-divider .bond { stroke: var(--line-strong); stroke-width: 1.5; }
.chain-divider .bead { fill: var(--bg); stroke: var(--accent); stroke-width: 1.5; filter: drop-shadow(0 0 4px rgba(51,224,174,0.5)); }

.lab-icon { width: 34px; height: 34px; flex-shrink: 0; }
.lab-icon path, .lab-icon circle, .lab-icon line, .lab-icon rect, .lab-icon polyline {
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.lab-icon .fill-accent { fill: var(--accent-soft); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding: 90px 0 64px; position: relative; overflow: hidden; }

.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 60px; align-items: center; }

@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

.hero h1 {
  margin-bottom: 22px;
  background: linear-gradient(120deg, var(--ink) 40%, var(--accent-bright));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lede { font-size: 1.15rem; max-width: 46ch; color: var(--ink-soft); }

.hero-actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover { text-decoration: none; }

.btn-primary { background: var(--accent); color: #04140F; box-shadow: var(--glow); }
.btn-primary:hover { background: var(--accent-bright); box-shadow: 0 0 32px rgba(51,224,174,0.5); }

.btn-secondary { background: rgba(255,255,255,0.03); color: var(--ink); border-color: var(--line-strong); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent-bright); }

.hero-visual { aspect-ratio: 1 / 1; display: flex; align-items: center; justify-content: center; }
.hero-visual svg { width: 100%; height: 100%; }

.disclaimer-strip {
  margin-top: 40px;
  padding: 14px 18px;
  background: var(--accent-soft);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-bright);
  display: flex;
  gap: 10px;
  align-items: flex-start;
  max-width: 640px;
}

/* ==========================================================================
   Section scaffolding
   ========================================================================== */
section { padding: 68px 0; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(51,224,174,0.03), transparent); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 40px; flex-wrap: wrap; }
.section-head .desc { max-width: 52ch; }

/* ==========================================================================
   Pillar cards
   ========================================================================== */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

@media (max-width: 860px) { .pillars { grid-template-columns: 1fr; } }

.pillar { background: var(--panel); padding: 36px 30px; transition: background 0.2s ease, box-shadow 0.2s ease; position: relative; }
.pillar:hover { background: var(--panel-raised); text-decoration: none; box-shadow: inset 0 0 0 1px var(--accent); }
.pillar .lab-icon { margin-bottom: 14px; }

.pillar-code { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent-2); letter-spacing: 0.1em; }
.pillar h3 { margin: 10px 0 10px; color: var(--ink); }
.pillar p { font-size: 0.94rem; margin-bottom: 0; }

/* ==========================================================================
   Specimen / compound cards
   ========================================================================== */
.specimen-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }

.specimen-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 24px;
  display: block;
  color: var(--ink);
  position: relative;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.specimen-card:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; box-shadow: 0 8px 30px rgba(51, 224, 174, 0.12); }

.specimen-code { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent-2); letter-spacing: 0.08em; display: block; margin-bottom: 10px; }
.specimen-card h3 { font-size: 1.15rem; margin-bottom: 6px; }

.tag-row { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0 12px; }
.tag { font-family: var(--font-mono); font-size: 0.68rem; padding: 3px 10px; border-radius: 20px; background: var(--accent-2-soft); color: var(--accent-2); letter-spacing: 0.03em; border: 1px solid rgba(79,195,255,0.2); }
.specimen-desc { font-size: 0.88rem; color: var(--ink-soft); margin-bottom: 0; }

/* ==========================================================================
   Digest / article teasers
   ========================================================================== */
.digest-list { display: flex; flex-direction: column; }
.digest-item { display: grid; grid-template-columns: 120px 1fr auto; gap: 24px; align-items: baseline; padding: 22px 0; border-top: 1px solid var(--line); color: var(--ink); }
.digest-item:last-child { border-bottom: 1px solid var(--line); }
.digest-item:hover { text-decoration: none; }
.digest-item:hover h4 { color: var(--accent-bright); text-decoration: underline; }

.digest-date { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-faint); }
.digest-item h4 { font-family: var(--font-display); font-size: 1.05rem; margin: 0; font-weight: 600; }
.digest-cat { font-family: var(--font-mono); font-size: 0.7rem; color: var(--accent-2); white-space: nowrap; }

@media (max-width: 640px) { .digest-item { grid-template-columns: 1fr; gap: 6px; } }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { border-top: 1px solid var(--line); padding: 50px 0 40px; background: var(--bg-alt); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-grid h5 { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); margin: 0 0 14px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 9px; }
.footer-grid a { color: var(--ink-soft); font-size: 0.9rem; }
.footer-grid a:hover { color: var(--accent-bright); }

.footer-compliance { font-size: 0.82rem; color: var(--ink-faint); border-top: 1px solid var(--line); padding-top: 24px; max-width: 800px; }
.footer-bottom { display: flex; justify-content: space-between; margin-top: 20px; font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-faint); flex-wrap: wrap; gap: 10px; }

/* ==========================================================================
   Page header (interior pages)
   ========================================================================== */
.page-header { padding: 58px 0 42px; border-bottom: 1px solid var(--line); }
.page-header .lede { max-width: 60ch; font-size: 1.05rem; }
.breadcrumb { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-faint); margin-bottom: 18px; }
.breadcrumb a { color: var(--ink-faint); }

/* ==========================================================================
   Content prose blocks
   ========================================================================== */
.prose-col { max-width: 760px; }
.prose-col h2 { margin-top: 2em; }
.prose-col h2:first-child { margin-top: 0; }
.prose-col ul, .prose-col ol { color: var(--ink-soft); padding-left: 1.3em; }
.prose-col li { margin-bottom: 0.5em; }

.callout { background: var(--accent-soft); border-left: 3px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 18px 22px; margin: 28px 0; font-size: 0.92rem; }
.callout p:last-child { margin-bottom: 0; }
.callout-warn { background: rgba(255, 138, 101, 0.08); border-left-color: var(--danger); }

.callout-source { background: var(--accent-2-soft); border-left-color: var(--accent-2); }
.callout-source .eyebrow { color: var(--accent-2); margin-bottom: 8px; }
.callout-source .eyebrow::before { background: var(--accent-2); box-shadow: 0 0 6px var(--accent-2); }
.callout-source .disclosure { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-faint); margin-top: 10px; display: block; }

.source-box-flex { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
.source-vial-link { flex-shrink: 0; display: block; border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--line-strong); transition: border-color 0.15s ease, box-shadow 0.15s ease; }
.source-vial-link:hover { border-color: var(--accent-2); box-shadow: 0 0 20px rgba(79,195,255,0.25); text-decoration: none; }
.source-vial-link img { display: block; width: 92px; height: auto; }
.source-box-text { flex: 1; min-width: 200px; }
.source-box-text p { margin-bottom: 0; }

.data-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; margin: 24px 0; }
.data-table th, .data-table td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.data-table th { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-faint); font-weight: 500; }
.data-table td:first-child, .data-table th:first-child { padding-left: 0; }

/* ==========================================================================
   Compound detail header
   ========================================================================== */
.spec-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 30px; flex-wrap: wrap; }
.spec-title-block .specimen-code { font-size: 0.8rem; margin-bottom: 12px; }
.spec-badges { display: flex; gap: 8px; flex-wrap: wrap; }

.mono-figure { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-md); padding: 20px 24px; font-family: var(--font-mono); font-size: 0.85rem; color: var(--ink-soft); min-width: 220px; }
.mono-figure dt { color: var(--ink-faint); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; margin-top: 12px; }
.mono-figure dt:first-child { margin-top: 0; }
.mono-figure dd { margin: 3px 0 0; color: var(--ink); }

.detail-grid { display: grid; grid-template-columns: 1fr 260px; gap: 56px; align-items: start; }
@media (max-width: 900px) { .detail-grid { grid-template-columns: 1fr; } }

.toc { position: sticky; top: 92px; border-left: 1px solid var(--line); padding-left: 20px; }
.toc .eyebrow { margin-bottom: 12px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin-bottom: 10px; }
.toc a { font-size: 0.86rem; color: var(--ink-soft); font-family: var(--font-mono); }
.toc a:hover { color: var(--accent-bright); }

/* ==========================================================================
   Utility
   ========================================================================== */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }