/* =====================================================================
   COGNREXA RESEARCH LABS — PUBLIC SITE DESIGN SYSTEM
   Institutional / registry aesthetic: a research-and-governance body
   that files real documents (SOPs, DOIs, patents, membership numbers),
   so the visual language borrows from archives, ledgers and letterheads
   rather than a generic SaaS/startup look.
   ===================================================================== */

:root {
  /* Color — cool porcelain paper, deep governance navy, research-green
     signal accent, archival gold for "filed/certified" moments. */
  --ink: #10161f;
  --ink-soft: #4e5968;
  --ink-faint: #7c8798;
  --paper: #f5f6f4;
  --surface: #ffffff;
  --line: #dee2e6;
  --line-soft: #eceef0;
  --navy: #142547;
  --navy-2: #1f3868;
  --signal: #0c8f6c;
  --signal-soft: #e6f3ee;
  --gold: #b8862e;
  --gold-soft: #f6ecd9;
  --danger: #b3261e;
  --danger-soft: #fbebe9;

  --radius: 3px;
  --radius-lg: 6px;
  --shadow: 0 1px 2px rgba(16, 22, 31, 0.06), 0 6px 20px rgba(16, 22, 31, 0.05);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: 'IBM Plex Sans', -apple-system, sans-serif;
  font-size: 16px;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

a { color: var(--navy); text-decoration: none; }
a:hover { color: var(--signal); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

h1, h2, h3 {
  font-family: 'Archivo', -apple-system, sans-serif;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}
h1 { font-size: 2.1rem; }
h2 { font-size: 1.4rem; margin-top: 2.2em; }
h3 { font-size: 1.08rem; }

/* ---------------------------------------------------------------------
   Masthead header — a letterhead, not a floating navbar. Double rule
   underneath is the recurring "filed & registered" motif of the site.
   --------------------------------------------------------------------- */
.site-header {
  background: var(--surface);
  border-bottom: 3px double var(--navy);
  padding: 18px 0;
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; }
.logo {
  font-family: 'Archivo', sans-serif;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: var(--navy) !important;
}
.logo span {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 500;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-top: 2px;
}
.main-nav { display: flex; flex-wrap: wrap; gap: 2px; align-items: center; }
.nav-item { position: relative; }
.main-nav a {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft) !important;
  padding: 8px 10px;
  border-radius: var(--radius);
}
.main-nav a:hover { color: var(--navy) !important; background: var(--paper); text-decoration: none; }
.caret { font-size: 0.6em; margin-left: 2px; }

/* Dropdown submenu — CSS-only on desktop (hover), JS-toggled on mobile */
.submenu {
  display: none;
  position: absolute;
  top: 100%; left: 0;
  min-width: 200px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--signal);
  border-radius: 0 var(--radius-lg) var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 6px;
  z-index: 40;
}
.nav-item.has-children:hover .submenu { display: block; }
.submenu a {
  display: block;
  padding: 9px 12px;
  font-size: 0.7rem;
  border-radius: var(--radius);
}
.submenu a:hover { background: var(--paper); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 34px; height: 34px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--navy); margin: 0 auto; }
.btn-ai {
  background: var(--navy);
  color: #fff !important;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 10px 18px;
  border-radius: var(--radius);
  text-decoration: none !important;
}
.btn-ai:hover { background: var(--signal); }

/* ---------------------------------------------------------------------
   Hero — deep navy field with a faint blueprint grid (the "lab" texture),
   a mono eyebrow tag, and an Archivo display headline as the thesis.
   --------------------------------------------------------------------- */
.hero {
  background:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.035) 0, rgba(255,255,255,0.035) 1px, transparent 1px, transparent 40px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.035) 0, rgba(255,255,255,0.035) 1px, transparent 1px, transparent 40px),
    linear-gradient(160deg, var(--navy) 0%, #0c1a33 100%);
  color: #fff;
  padding: 76px 0 68px;
  text-align: left;
}
.hero .container::before {
  content: 'COGNREXA RESEARCH LABS · ESTABLISHED REGISTRY';
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 18px;
}
.hero h1 {
  color: #fff;
  font-size: 2.6rem;
  max-width: 16ch;
  margin-bottom: 0.4em;
}
.hero p {
  color: rgba(255,255,255,0.78);
  max-width: 56ch;
  font-size: 1.05rem;
  margin-bottom: 1.8em;
}
.btn-primary, .btn-secondary {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 12px 24px;
  border-radius: var(--radius);
  margin: 6px 10px 6px 0;
  text-decoration: none !important;
}
/* Default (non-hero) treatment: solid navy, used on paper backgrounds */
.btn-primary { background: var(--navy); color: #fff !important; border: 1px solid var(--navy); }
.btn-primary:hover { background: var(--signal); border-color: var(--signal); color: #fff !important; }
.btn-secondary { background: transparent; border: 1px solid var(--navy); color: var(--navy) !important; }
.btn-secondary:hover { background: var(--navy); color: #fff !important; }

.hero .btn-primary { background: #fff; color: var(--navy) !important; border-color: #fff; }
.hero .btn-primary:hover { background: var(--gold); border-color: var(--gold); color: #fff !important; }
.hero .btn-secondary { background: transparent; border: 1px solid rgba(255,255,255,0.4); color: #fff !important; }
.hero .btn-secondary:hover { border-color: #fff; background: transparent; }

/* ---------------------------------------------------------------------
   Homepage hero slider — same navy/blueprint-grid field as .hero, but
   stacked slides that cross-fade, admin-managed via Admin → Slider.
   --------------------------------------------------------------------- */
.hero-slider { position: relative; overflow: hidden; min-height: 460px; }
.hero-slider .slide {
  position: absolute; inset: 0;
  display: flex; align-items: center;
  background:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.035) 0, rgba(255,255,255,0.035) 1px, transparent 1px, transparent 40px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.035) 0, rgba(255,255,255,0.035) 1px, transparent 1px, transparent 40px),
    linear-gradient(160deg, var(--navy) 0%, #0c1a33 100%);
  background-size: cover;
  background-position: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s ease;
}
.hero-slider .slide.active { opacity: 1; visibility: visible; position: relative; }
.hero-slider .slide:not(.active) { position: absolute; }
.slide-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(12,22,42,0.82) 0%, rgba(12,22,42,0.55) 65%, rgba(12,22,42,0.35) 100%); }
.slide-content { position: relative; z-index: 2; padding: 76px 0; }
.slide-content::before {
  content: 'COGNREXA RESEARCH LABS · ESTABLISHED REGISTRY';
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 18px;
}
.slide-content h1 { color: #fff; font-size: 2.5rem; max-width: 17ch; margin-bottom: 0.4em; }
.slide-content p { color: rgba(255,255,255,0.8); max-width: 56ch; font-size: 1.03rem; margin-bottom: 1.7em; }
.slide-content .btn-primary { background: #fff; color: var(--navy) !important; border-color: #fff; }
.slide-content .btn-primary:hover { background: var(--gold); border-color: var(--gold); color: #fff !important; }
.slide-content .btn-secondary { background: transparent; border: 1px solid rgba(255,255,255,0.4); color: #fff !important; }
.slide-content .btn-secondary:hover { border-color: #fff; background: transparent; }

.slider-dots { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; z-index: 3; }
.slider-dots .dot { width: 8px; height: 8px; padding: 0; border-radius: 50%; border: 1px solid rgba(255,255,255,0.6); background: transparent; cursor: pointer; }
.slider-dots .dot.active { background: var(--gold); border-color: var(--gold); }
.slider-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.3); color: #fff;
  font-size: 1.4rem; line-height: 1; cursor: pointer; z-index: 3;
}
.slider-arrow:hover { background: rgba(255,255,255,0.22); }
.slider-arrow.prev { left: 18px; }
.slider-arrow.next { right: 18px; }
@media (prefers-reduced-motion: reduce) { .hero-slider .slide { transition: none; } }

section { padding: 44px 0; }

/* ---------------------------------------------------------------------
   Cards — filed "index cards": hairline border, thin signal-green top
   rule, and a small gold corner tab, like a document pulled from a
   registry drawer. The existing <span class="muted"> that many cards
   already place before their heading becomes the monospace file tag.
   --------------------------------------------------------------------- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--signal);
  border-radius: var(--radius-lg);
  padding: 24px 22px 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 0; height: 0;
  border-style: solid;
  border-width: 0 22px 22px 0;
  border-color: transparent var(--gold-soft) transparent transparent;
}
.card h3 { margin-top: 4px; }
.card h3 a { color: var(--navy); }
.card .muted {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-content h1 { color: var(--navy); }
.page-content dl { display: grid; grid-template-columns: 200px 1fr; gap: 10px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 20px 22px; }
.page-content dt {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------------------------------------------------------------------
   Search / filters
   --------------------------------------------------------------------- */
.doc-search { display: flex; gap: 10px; margin: 22px 0; flex-wrap: wrap; }
.doc-search input, .doc-search select {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: inherit;
  background: var(--surface);
}
.doc-search button {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ---------------------------------------------------------------------
   Ledger tables — the site's real registers (SOPs, transactions,
   publications) get an actual ledger treatment: mono figures, uppercase
   letter-spaced headers, faint zebra striping.
   --------------------------------------------------------------------- */
.doc-table { width: 100%; border-collapse: collapse; margin-top: 20px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.doc-table th, .doc-table td {
  border-bottom: 1px solid var(--line-soft);
  padding: 12px 14px;
  text-align: left;
  font-size: 0.88rem;
}
.doc-table th {
  background: var(--navy);
  color: #fff;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.doc-table td { font-family: 'IBM Plex Mono', monospace; font-size: 0.82rem; color: var(--ink-soft); }
.doc-table tbody tr:nth-child(even) { background: var(--paper); }
.doc-table tbody tr:hover { background: var(--signal-soft); }
.doc-table td a { font-family: 'IBM Plex Sans', sans-serif; }

/* ---------------------------------------------------------------------
   Forms
   --------------------------------------------------------------------- */
form label {
  display: block;
  margin-bottom: 16px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
form input, form textarea, form select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-top: 6px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 400;
  text-transform: none;
  letter-spacing: normal;
  color: var(--ink);
  background: var(--surface);
}
form input:focus, form textarea:focus, form select:focus {
  border-color: var(--signal);
}
form button, button {
  cursor: pointer;
  border: none;
  background: var(--navy);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
form button:hover, button:hover { background: var(--signal); }

.alert-success {
  background: var(--signal-soft);
  border: 1px solid var(--signal);
  color: #0a5c46;
  padding: 14px 18px;
  border-radius: var(--radius);
  margin: 18px 0;
  font-size: 0.92rem;
}
.alert-error {
  background: var(--danger-soft);
  border: 1px solid var(--danger);
  color: #7a1913;
  padding: 14px 18px;
  border-radius: var(--radius);
  margin: 18px 0;
  font-size: 0.92rem;
}
.alert-error ul { margin: 0; padding-left: 18px; }

/* ---------------------------------------------------------------------
   Footer — mirrors the masthead's double rule
   --------------------------------------------------------------------- */
.site-footer {
  border-top: 3px double var(--navy);
  padding: 34px 0 20px;
  margin-top: 50px;
  color: var(--ink-faint);
  font-size: 0.85rem;
}
.footer-grid { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 20px; padding-bottom: 20px; }
.footer-brand .logo { font-size: 1rem; }
.footer-brand p { margin: 8px 0 0; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 4px 4px; justify-content: flex-end; max-width: 460px; }
.footer-nav a {
  margin: 0 6px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-soft) !important;
}
.footer-nav a:hover { color: var(--signal) !important; }
.footer-copy { text-align: center; border-top: 1px solid var(--line-soft); padding-top: 16px; margin: 0; }

.muted { color: var(--ink-faint); font-size: 0.9rem; }

.area-filter a {
  display: inline-block;
  margin: 4px 8px 18px 0;
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-soft) !important;
  background: var(--surface);
}
.area-filter a.active { background: var(--navy); border-color: var(--navy); color: #fff !important; }
.area-filter a:hover:not(.active) { border-color: var(--navy); color: var(--navy) !important; }

@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    margin-top: 12px;
    padding: 8px;
    order: 3;
  }
  .main-nav.open { display: flex; }
  .nav-item { width: 100%; }
  .main-nav a { display: block; padding: 10px 12px; }
  .submenu { position: static; display: none; border: none; box-shadow: none; padding-left: 14px; }
  .nav-item.has-children.open .submenu { display: block; }
  .nav-item.has-children:hover .submenu { display: none; }
  .nav-item.has-children.open:hover .submenu { display: block; }
  .footer-grid { flex-direction: column; }
  .footer-nav { justify-content: flex-start; max-width: none; }
}

@media (max-width: 640px) {
  .hero { padding: 56px 0 48px; }
  .hero h1 { font-size: 1.9rem; }
  h1 { font-size: 1.6rem; }
  .main-nav a { padding: 8px 10px; font-size: 0.7rem; }
  .page-content dl { grid-template-columns: 1fr; }
}