/* =========================================================
   SITE-NAV — shared module v5
   --------------------------------------------------------
   v5: Migrated .site-nav-drawer-legal-sep color from
   --ink-faint (~1.7:1, failing WCAG AA) to --ink-label
   (~6.5:1, AAA). Sizing/behavior/markup unchanged from v4.

   Historical v4 description retained below.
   --------------------------------------------------------
   v4 increases header presence: row height 64 → 80px,
   logo SVG 22 → 28px, links 13 → 14.5px with gap 28 → 40px,
   CTA 12 → 13px / 9 18 → 11 20px padding. Drawer top-padding
   tracks the new row height (64 → 80) so the open menu still
   clears the sticky bar cleanly. Behavior, markup, and active-
   state mechanics unchanged from v3; this is a sizing/spacing
   pass only.

     - Brand block: status-line only — teal signal dot +
       ZRS // OPERATIONS mono caps, wrapped in /-link.
     - Primary list: 4 destinations (Platform / Industries /
       Pricing / Company) — flat, no chevrons, hairline dividers,
       72px row height. Active page gets a 2px teal bar inside
       the row's left padding (driven by aria-current=page set
       by site-nav.v3.js).
     - Footer: 3 populated sections (Try Zaras / Contact / Legal)
       with visible content under each caps label, plus a single-
       line © floor. No `margin-top: auto` dead-zone.

   Static markup convention (consumer pages ship this verbatim):
     <header class="site-nav">
       <div class="site-nav-row">
         <a class="site-nav-logo" href="/">...</a>
         <nav class="site-nav-links" aria-label="Primary">
           <a href="/platform">Platform</a>
           ...
         </nav>
         <button class="site-nav-toggle" type="button" ...>
           <span class="site-nav-toggle-bar"></span>×3
         </button>
         <a class="site-nav-cta" href="#access" data-source="nav">Request access</a>
       </div>
     </header>
     <div class="site-nav-drawer" id="site-nav-drawer"
          role="dialog" aria-modal="true" aria-label="Main menu" hidden>
       <div class="site-nav-drawer-inner">
         <a class="site-nav-drawer-brand" href="/" aria-label="Zaras AI home">
           <span class="site-nav-drawer-brand-status">
             <span class="site-nav-drawer-brand-dot"></span> ZRS // OPERATIONS
           </span>
         </a>
         <nav class="site-nav-drawer-primary" aria-label="Primary">
           <a href="/platform" class="site-nav-drawer-link">Platform</a>
           ...4 links...
         </nav>
         <div class="site-nav-drawer-footer">
           <div class="site-nav-drawer-section">
             <span class="site-nav-drawer-label">Try Zaras</span>
             <a class="site-nav-drawer-cta" href="#access" data-source="mobile-drawer">
               Request access <span class="site-nav-drawer-cta-arrow">→</span>
             </a>
           </div>
           <div class="site-nav-drawer-section">
             <span class="site-nav-drawer-label">Contact</span>
             <a class="site-nav-drawer-email" href="mailto:support@zaras.ai">support@zaras.ai</a>
           </div>
           <div class="site-nav-drawer-section">
             <span class="site-nav-drawer-label">Legal</span>
             <div class="site-nav-drawer-legal">
               <a href="/terms">Terms</a><span class="site-nav-drawer-legal-sep">·</span><a href="/privacy">Privacy</a><span class="site-nav-drawer-legal-sep">·</span><a href="/sms-consent">SMS Consent</a>
             </div>
           </div>
           <div class="site-nav-drawer-copyright">© 2026 ZARAS AI</div>
         </div>
       </div>
     </div>

   Cache-busting: filename-versioned (vN → vN+1 on any change).
   Behavior + JS: js/site-nav.v3.js (sibling module).
   ========================================================= */

[hidden] { display: none !important; }

/* -- Sticky header bar (unchanged from v1) ---------------------------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: inset 0 1px 0 0
    color-mix(in oklab, var(--ink) 6%, transparent);
}

.site-nav-blur,
.site-nav-blur > * {
  pointer-events: none;
}
.site-nav-blur__l1,
.site-nav-blur__l2,
.site-nav-blur__l3 {
  position: absolute;
  inset: 0 0 -28px 0;
}
.site-nav-blur__l1 {
  z-index: -3;
  background: color-mix(in oklab, var(--bg) 65%, transparent);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  mask-image: linear-gradient(to bottom,
    black 0%, black 50%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom,
    black 0%, black 50%, transparent 100%);
}
.site-nav-blur__l2 {
  z-index: -2;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  mask-image: linear-gradient(to bottom,
    black 0%, black 40%, transparent 90%);
  -webkit-mask-image: linear-gradient(to bottom,
    black 0%, black 40%, transparent 90%);
}
.site-nav-blur__l3 {
  z-index: -1;
  background: color-mix(in oklab, var(--bg) 25%, transparent);
  backdrop-filter: blur(48px) saturate(140%);
  -webkit-backdrop-filter: blur(48px) saturate(140%);
  mask-image: linear-gradient(to bottom,
    black 0%, black 25%, transparent 65%);
  -webkit-mask-image: linear-gradient(to bottom,
    black 0%, black 25%, transparent 65%);
}

/* -- Row layout (v4: 64 → 80 height, 32 → 36 gap) -------------------- */
.site-nav-row {
  max-width: var(--maxw, 1240px);
  margin: 0 auto;
  padding: 0 var(--gutter, 24px);
  height: 80px;
  display: flex;
  align-items: center;
  gap: 36px;
}

/* -- Logo (v4: 20 → 24 wrapper, 22 → 28 SVG) ------------------------- */
.site-nav-logo {
  display: inline-flex;
  align-items: center;
  height: 24px;
  border-bottom: none;
  flex: 0 0 auto;
}
.site-nav-logo svg { height: 28px; width: auto; display: block; }
.site-nav-logo .site-nav-brand-mark { display: none; }
.site-nav-logo .site-nav-brand-full { display: block; }

/* -- Desktop nav links (v4: 13 → 14.5 size, 28 → 40 gap) -------------- */
.site-nav-links {
  display: flex;
  gap: 40px;
  margin: 0 auto;
  font-family: var(--mono);
  font-size: 14.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-sub);
}
.site-nav-links a {
  color: inherit;
  text-decoration: none;
  border-bottom: none;
  transition: color 180ms ease;
}
.site-nav-links a:hover { color: var(--ink); }

body[data-page="platform"] .site-nav-links a[href="/platform"] {
  color: var(--ink);
}
body[data-page="industries"] .site-nav-links a[href="/industries"] {
  color: var(--ink);
}
body[data-page="pricing"] .site-nav-links a[href="/pricing"] {
  color: var(--ink);
}
body[data-page="company"] .site-nav-links a[href="/company"] {
  color: var(--ink);
}

/* -- CTA (v4: 12 → 13 size, 9 18 → 11 20 padding) -------------------- */
.site-nav-cta {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  padding: 11px 20px;
  border: 1px solid var(--rule-hi);
  border-radius: 999px;
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}
.site-nav-cta:hover {
  border-color: var(--signal);
  color: var(--signal-ink);
}
.site-nav-cta:active {
  border-color: var(--ink);
  background: rgba(255,255,255,0.04);
  transform: scale(0.97);
  transition: transform 120ms cubic-bezier(.2,.6,.1,1), background 120ms ease, border-color 120ms ease;
}

/* -- Hamburger (unchanged from v1) ------------------------------------ */
.site-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  margin: 0;
  background: transparent;
  border: 1px solid var(--rule-hi);
  border-radius: 999px;
  cursor: pointer;
  position: relative;
  flex-direction: column;
  gap: 5px;
  transition: border-color 180ms ease, background 180ms ease;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
  flex: 0 0 auto;
}
.site-nav-toggle:active { background: rgba(255,255,255,0.04); }
.site-nav-toggle-bar {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  color: var(--ink);
  transition: transform 240ms cubic-bezier(.2,.6,.1,1), opacity 160ms ease;
  transform-origin: center;
  pointer-events: none;
}
.site-nav-toggle[aria-expanded="true"] .site-nav-toggle-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.site-nav-toggle[aria-expanded="true"] .site-nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.site-nav-toggle[aria-expanded="true"] .site-nav-toggle-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* =====================================================================
   MOBILE DRAWER — v2 redesign (drawer top-padding tracks v4 row 64→80)
   ===================================================================== */
.site-nav-drawer {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: var(--bg);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding-top: calc(80px + env(safe-area-inset-top));
  padding-bottom: calc(24px + env(safe-area-inset-bottom));
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

.site-nav-drawer-inner {
  max-width: var(--maxw, 1240px);
  margin: 0 auto;
  padding: 0 var(--gutter, 24px);
  display: flex;
  flex-direction: column;
}

/* -- Brand block — status-line only (v3) ------------------------------ */
.site-nav-drawer-brand {
  display: block;
  padding: 20px 0 24px;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
}
.site-nav-drawer-brand-status {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.site-nav-drawer-brand-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 8px rgba(118,199,178,0.6);
}

/* -- Primary nav list (flat, no chevrons, 72px rows) ------------------ */
.site-nav-drawer-primary {
  display: flex;
  flex-direction: column;
}
.site-nav-drawer-link {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 72px;
  padding: 0 0 0 16px;
  font-family: var(--sans);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  transition: color 180ms ease, padding-left 220ms cubic-bezier(.2,.6,.1,1);
}
/* Active page: 2px teal bar inside the row's left padding (set by
   site-nav.v3.js via aria-current="page" — body[data-page] driven). */
.site-nav-drawer-link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 22px;
  background: var(--signal);
}
.site-nav-drawer-link:active {
  padding-left: 22px;
  color: var(--ink-sub);
}

/* -- Footer — populated sections under each caps label ---------------- */
.site-nav-drawer-footer {
  padding: 32px 0 16px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.site-nav-drawer-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.site-nav-drawer-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.site-nav-drawer-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border: 1px solid var(--rule-hi);
  border-radius: 12px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  margin-top: 4px;
  min-height: 56px;
  transition: border-color 180ms ease, background 180ms ease;
}
.site-nav-drawer-cta:hover { border-color: var(--signal); }
.site-nav-drawer-cta:active {
  background: rgba(255,255,255,0.04);
  border-color: var(--ink);
}
.site-nav-drawer-cta-arrow {
  font-family: var(--sans);
  font-size: 18px;
  color: var(--signal);
  letter-spacing: 0;
}
.site-nav-drawer-email {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink);
  letter-spacing: 0.02em;
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2px;
  align-self: flex-start;
}
.site-nav-drawer-email:hover { border-bottom-color: var(--signal); }
.site-nav-drawer-legal {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-sub);
  letter-spacing: 0.06em;
}
.site-nav-drawer-legal a {
  color: var(--ink-sub);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1px;
  transition: color 180ms ease, border-color 180ms ease;
}
.site-nav-drawer-legal a:hover {
  color: var(--ink);
  border-bottom-color: var(--signal);
}
.site-nav-drawer-legal-sep {
  color: var(--ink-label);
  margin: 0 8px;
}
.site-nav-drawer-copyright {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.10em;
  color: var(--ink-mute);
}

/* -- Body scroll lock when drawer open (unchanged from v1) ----------- */
body.site-nav-locked {
  overflow: hidden;
  position: fixed;
  width: 100%;
  left: 0;
  right: 0;
}
body.site-nav-locked .site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
body.site-nav-locked .site-nav-blur { display: none; }

/* -- Mobile breakpoint (unchanged from v1) --------------------------- */
@media (max-width: 720px) {
  .site-nav-row { gap: 10px; }
  .site-nav-links { display: none; }
  .site-nav-cta {
    padding: 10px 14px;
    font-size: 11px;
    min-height: 44px;
    letter-spacing: 0.04em;
    margin-left: auto;
  }
  .site-nav-toggle {
    display: inline-flex;
    order: 1;
  }
  .site-nav-logo .site-nav-brand-full { display: none; }
  .site-nav-logo .site-nav-brand-mark { display: block; }
}

@media (max-width: 380px) {
  .site-nav-row { gap: 8px; }
  .site-nav-cta { padding: 9px 12px; font-size: 10.5px; letter-spacing: 0.03em; }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav-drawer-link,
  .site-nav-toggle-bar { transition: none !important; }
}

@media print {
  .site-nav-toggle,
  .site-nav-drawer { display: none !important; }
}