/* ============================================================
   IDF Kenya — Navbar Component
   All rules scoped to .site-header and its children.
   ============================================================ */

.site-header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: var(--header-z);
  background-color: rgba(255, 255, 255, 0);
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  transition: all var(--transition-slow);
  padding: 1.25rem 0;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.92) !important;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  padding: 0.75rem 0;
  box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

/* ---- Nav inner ---- */
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* ---- Logo ---- */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}
.logo:hover { opacity: 0.9; }
.logo:focus-visible {
  outline: 2px solid var(--idf-blue-light);
  outline-offset: 6px;
  border-radius: 4px;
}
.logo__picture { display: flex; align-items: center; }
.logo__img {
  width: var(--logo-width-desktop);
  height: var(--logo-height-desktop);
  display: block;
  object-fit: contain;
  transition: all var(--transition-slow);
}
.site-header.is-scrolled .logo__img {
  width: calc(var(--logo-width-desktop) * 0.85);
  height: calc(var(--logo-height-desktop) * 0.85);
  filter: none;
}
.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.logo__primary {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--idf-white) !important;
  letter-spacing: -0.01em;
  transition: all var(--transition-slow);
}
.logo__full {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9) !important;
  letter-spacing: 0.03em;
  white-space: nowrap;
  transition: all var(--transition-slow);
  margin-top: 0.15rem;
}
.logo__tagline {
  font-family: var(--font-sans);
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--idf-green-light);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: all var(--transition-slow);
  margin-top: 0.1rem;
}
.site-header.is-scrolled .logo__primary { color: var(--idf-navy) !important; font-size: 1.05rem; }
.site-header.is-scrolled .logo__full    { color: var(--idf-navy) !important; font-size: 0.65rem; }
.site-header.is-scrolled .logo__tagline { color: var(--idf-green); }

.logo__fallback { display: none; flex-direction: column; gap: 0.15rem; }
.logo--img-error .logo__img { display: none; }
.logo--img-error .logo__fallback { display: flex; }
.logo__fallback-primary {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: inherit;
  letter-spacing: -0.01em;
}
.logo__accent { color: var(--idf-green); }
.logo__fallback-tag {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
}

/* ---- Desktop nav ---- */
.desktop-nav { display: flex; align-items: center; margin-left: auto; }
.desktop-nav__list {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  list-style: none;
}
.nav-link {
  position: relative;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85) !important;
  text-decoration: none;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 1px;
  background: var(--idf-green-light);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.4s var(--ease-out-expo);
}
.site-header.is-scrolled .nav-link { color: var(--idf-navy) !important; }
.site-header.is-scrolled .nav-link::after { background: var(--idf-green); }
.nav-link:hover::after,
.nav-link.is-active::after { transform: scaleX(1); transform-origin: left center; }
.nav-link:hover,
.nav-link.is-active { color: var(--idf-white) !important; }
.site-header.is-scrolled .nav-link:hover,
.site-header.is-scrolled .nav-link.is-active { color: var(--idf-green) !important; }
.nav-link:focus-visible {
  outline: 2px solid var(--idf-green);
  outline-offset: 4px;
  border-radius: 2px;
}

/* ---- Hamburger ---- */
.hamburger-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  cursor: pointer;
  color: var(--idf-white);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}
.hamburger-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
}
.site-header.is-scrolled .hamburger-btn {
  color: var(--idf-navy);
  border-color: rgba(0, 0, 0, 0.1);
}
.site-header.is-scrolled .hamburger-btn:hover {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.2);
}
.hamburger-btn[aria-expanded="true"] {
  background: var(--idf-green);
  border-color: var(--idf-green);
  color: var(--idf-white) !important;
}
.hamburger-line {
  transition: transform 0.4s var(--ease-out-expo), opacity 0.3s ease;
  transform-origin: center;
}
.hamburger-btn[aria-expanded="true"] .hamburger-line--top    { transform: translateY(5px) rotate(45deg); }
.hamburger-btn[aria-expanded="true"] .hamburger-line--mid    { opacity: 0; transform: scaleX(0); }
.hamburger-btn[aria-expanded="true"] .hamburger-line--bottom { transform: translateY(-5px) rotate(-45deg); }

/* ---- Mobile drawer ---- */
.mobile-drawer {
  position: absolute;
  top: 100%; left: 0; right: 0;
  background: var(--idf-navy-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  max-height: 0;
  overflow: hidden;
  visibility: hidden;
  opacity: 0;
  transition: max-height 0.5s var(--ease-out-expo), opacity 0.4s ease, visibility 0.5s;
  z-index: calc(var(--header-z) - 1);
}
.mobile-drawer.is-open {
  max-height: 90vh;
  opacity: 1;
  visibility: visible;
  overflow-y: auto;
}

/* ---- Nav card container ---- */
.mobile-nav-container {
  padding: 0.75rem var(--container-pad) 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* ---- Nav cards ---- */
.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--r-md);
  text-decoration: none;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  min-height: 52px;
}
.mobile-nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateX(4px);
}
.mobile-nav-link.is-active {
  background: rgba(58, 125, 68, 0.15);
  border-color: rgba(58, 125, 68, 0.4);
}

/* ---- Card icon ---- */
.mobile-nav-icon {
  width: 38px; height: 38px;
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--idf-blue-light);
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.mobile-nav-link:hover .mobile-nav-icon,
.mobile-nav-link.is-active .mobile-nav-icon {
  background: var(--idf-green);
  color: var(--idf-white);
}

/* ---- Card body ---- */
.mobile-nav-body {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  flex: 1;
  min-width: 0;
}
.mobile-nav-label {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--idf-white);
  line-height: 1;
}
.mobile-nav-desc {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mobile-nav-link.is-active .mobile-nav-label {
  color: var(--idf-green-light);
}

/* ---- Card arrow ---- */
.mobile-nav-arrow {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
  transition: color var(--transition-fast), transform var(--transition-fast);
}
.mobile-nav-link:hover .mobile-nav-arrow {
  color: var(--idf-green-light);
  transform: translateX(3px);
}

/* ---- Drawer footer ---- */
.drawer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem var(--container-pad) 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 0.5rem;
}
.drawer-social {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ---- Responsive ---- */
@media (max-width: 960px) {
  .desktop-nav  { display: none; }
  .hamburger-btn { display: flex; }
}