/* =============================================================
   COENGR EYE — Navigation Styles
   nav.css
   ============================================================= */

/* ── Nav Bar ───────────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 22px 0;
  transition: background-color var(--transition-normal),
              padding var(--transition-normal),
              box-shadow var(--transition-normal);
}

/* Scrolled — crisp white */
.site-nav.scrolled {
  background-color: #FFFFFF;
  padding: 14px 0;
  box-shadow: 0 2px 24px rgba(7,18,26,0.10);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

/* ── Logo ──────────────────────────────────────────────────── */
.nav__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.nav__logo img {
  height: 40px;
  width: auto;
  transition: opacity var(--transition-fast);
}

/* Show dark logo when scrolled, light logo on transparency */
.nav__logo .logo-light { display: block; }
.nav__logo .logo-dark  { display: none;  }

.site-nav.scrolled .nav__logo .logo-light { display: none;  }
.site-nav.scrolled .nav__logo .logo-dark  { display: block; }

/* ── Links ─────────────────────────────────────────────────── */
.nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__link {
  font-size: 15px;
  font-weight: var(--weight-medium);
  color: rgba(255,255,255,0.90);
  position: relative;
  transition: color var(--transition-fast);
}

.site-nav.scrolled .nav__link {
  color: var(--color-navy);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-normal);
  border-radius: 1px;
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-accent);
}

.site-nav.scrolled .nav__link:hover,
.site-nav.scrolled .nav__link.active {
  color: var(--color-accent);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* ── Dropdown ──────────────────────────────────────────────── */
.nav__item {
  position: relative;
}

.nav__item:hover .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav__dropdown {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 240px;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 10px 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal),
              transform var(--transition-normal),
              visibility var(--transition-normal);
  box-shadow: 0 16px 48px rgba(7,18,26,0.14);
}

/* Arrow pointer */
.nav__dropdown::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: #FFFFFF;
  border-left: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
}

.nav__dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--color-text-body);
  transition: color var(--transition-fast),
              background-color var(--transition-fast),
              padding-left var(--transition-fast);
}

.nav__dropdown a:hover {
  color: var(--color-accent);
  background-color: var(--color-accent-tint);
  padding-left: 26px;
}

/* ── CTA Button ────────────────────────────────────────────── */
.nav__cta {
  flex-shrink: 0;
}

/* Outline style over transparent hero, solid after scroll */
.nav__cta .btn-primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border: 2px solid var(--color-accent);
}

/* ── Hamburger ─────────────────────────────────────────────── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  cursor: pointer;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #FFFFFF;
  border-radius: 2px;
  transition: transform var(--transition-normal),
              opacity var(--transition-normal),
              background-color var(--transition-normal);
}

.site-nav.scrolled .nav__hamburger span {
  background-color: var(--color-navy);
}

/* Hamburger → X animation */
.nav-open .nav__hamburger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-open .nav__hamburger span:nth-child(2) {
  opacity: 0;
}
.nav-open .nav__hamburger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Drawer ─────────────────────────────────────────── */
.nav__mobile-drawer {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: min(320px, 90vw);
  height: 100dvh;
  background-color: #FFFFFF;
  border-left: 1px solid var(--color-border);
  padding: 80px 28px 40px;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
  transition: right var(--transition-normal);
  z-index: 999;
  box-shadow: -8px 0 40px rgba(7,18,26,0.12);
}

.nav-open .nav__mobile-drawer {
  right: 0;
}

.nav__mobile-link {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  font-weight: var(--weight-medium);
  color: var(--color-navy);
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}

.nav__mobile-link:hover {
  color: var(--color-accent);
}

.nav__mobile-group-label {
  font-size: var(--text-caption);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  padding: 20px 0 8px;
}

.nav__mobile-sub {
  padding: 10px 0 10px 16px;
  font-size: 14px;
  color: var(--color-text-body);
  border-bottom: 1px solid rgba(218,218,218,0.5);
  display: block;
  transition: color var(--transition-fast);
}

.nav__mobile-sub:hover {
  color: var(--color-accent);
}

.nav__mobile-cta {
  margin-top: 28px;
}

/* Overlay when drawer is open */
.nav__overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(7,18,26,0.55);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.nav-open .nav__overlay {
  opacity: 1;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .nav__links,
  .nav__cta {
    display: none;
  }
  .nav__hamburger {
    display: flex;
  }
  .nav__mobile-drawer {
    display: flex;
  }
  .nav__overlay {
    display: block;
  }
}