/* ============================================================
   Navigation Bar
   CNC Website · Dhofar University · 2026
   ============================================================ */

/* ── Base ────────────────────────────────────────────────── */
.navbar {
  position: fixed !important;
  top: 0 !important;
  left: 0;
  right: 0;
  width: 100%;
  height: var(--navbar-height);
  z-index: 1000 !important;
  transition: height var(--transition-slow), background var(--transition-slow), box-shadow var(--transition-slow);
  background: #ffffff;
  border-bottom: 1px solid rgba(15,23,42,0.08);
  box-shadow: var(--shadow-sm);
}

/* Scrolled state — slightly more elevated */
.navbar.is-scrolled {
  height: var(--navbar-height-scrolled);
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(15,23,42,0.10);
  box-shadow: var(--shadow-md);
}

/* ── Container ───────────────────────────────────────────── */
.navbar__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-inline: var(--container-px);
  max-width: var(--container-max);
  margin-inline: auto;
}

/* ── Logo ────────────────────────────────────────────────── */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}
.navbar__logo:hover { opacity: 0.85; }

.navbar__logo-img {
  height: 78px;
  width: auto;
  object-fit: contain;
  border-radius: 10px;
  transition: height var(--transition-slow), transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: 0 2px 8px rgba(30,58,138,0.10);
}
.navbar__logo:hover .navbar__logo-img {
  transform: scale(1.04);
  box-shadow: 0 4px 16px rgba(30,58,138,0.18);
}
.navbar.is-scrolled .navbar__logo-img { height: 60px; }

.navbar__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.navbar__logo-cnc {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  letter-spacing: 0.08em;
  line-height: 1;
}
.navbar__logo-subtitle {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-body);
  letter-spacing: var(--tracking-wide);
  white-space: nowrap;
}

/* ── Desktop Nav ─────────────────────────────────────────── */
.navbar__nav {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

.navbar__nav-item { position: relative; }

.navbar__nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-body);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
}
.navbar__nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: var(--space-3);
  right: var(--space-3);
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}
.navbar__nav-link:hover,
.navbar__nav-link--active {
  color: var(--color-primary);
}
.navbar__nav-link:hover::after,
.navbar__nav-link--active::after {
  transform: scaleX(1);
}
.navbar__nav-link--active {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

/* Services dropdown chevron */
.navbar__nav-link .nav-chevron {
  font-size: 10px;
  transition: transform var(--transition-fast);
}
.navbar__nav-item:hover .nav-chevron { transform: rotate(180deg); }

/* ── Dropdown ────────────────────────────────────────────── */
.navbar__dropdown {
  position: absolute;
  /* Start flush with bottom of nav-item; padding-top creates
     the visual gap while keeping mouse hover connected */
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: #ffffff;
  border: 1px solid rgba(15,23,42,0.10);
  border-radius: var(--radius-xl);
  min-width: 240px;
  padding: var(--space-2);
  padding-top: calc(var(--space-2) + 8px); /* 8px transparent bridge */
  list-style: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
}
[dir="rtl"] .navbar__dropdown { left: auto; right: 50%; transform: translateX(50%) translateY(8px); }
[dir="rtl"] .navbar__nav-item:hover .navbar__dropdown { transform: translateX(50%) translateY(0); }

.navbar__nav-item:hover .navbar__dropdown,
.navbar__nav-item:focus-within .navbar__dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
[dir="rtl"] .navbar__nav-item:hover .navbar__dropdown { transform: translateX(50%) translateY(0); }

.navbar__dropdown-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-body);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  text-decoration: none;
}
.navbar__dropdown-link:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
  padding-left: var(--space-5);
}
[dir="rtl"] .navbar__dropdown-link:hover { padding-left: var(--space-4); padding-right: var(--space-5); }

.navbar__dropdown-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: rgba(30,58,138,0.07);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  color: var(--color-primary);
  flex-shrink: 0;
  transition: background var(--transition-fast);
}
.navbar__dropdown-link:hover .navbar__dropdown-icon {
  background: rgba(30,58,138,0.14);
}

/* ── Right Actions ───────────────────────────────────────── */
.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

/* ── Language Toggle ─────────────────────────────────────── */
.navbar__lang {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--color-bg-surface);
  border: 1px solid rgba(15,23,42,0.12);
  border-radius: var(--radius-full);
  padding: 3px;
  text-decoration: none;
}
.navbar__lang-opt {
  padding: 4px 10px;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  color: var(--color-text-body);
  white-space: nowrap;
  cursor: pointer;
}
.navbar__lang-opt.is-active {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: none;
}

/* ── CTA Button ──────────────────────────────────────────── */
.navbar__cta {
  padding: 0.55rem 1.25rem;
  font-size: var(--text-xs);
}

/* ── Hamburger ───────────────────────────────────────────── */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: var(--color-bg-surface);
  border: 1px solid rgba(15,23,42,0.12);
  border-radius: var(--radius-md);
  padding: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.navbar__hamburger:hover {
  background: var(--color-bg-alt);
  border-color: rgba(30,58,138,0.25);
}
.navbar__hamburger span {
  display: block;
  height: 2px;
  background: var(--color-text-heading);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  transform-origin: center;
}
/* Hamburger → X animation */
.navbar__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__hamburger.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.navbar__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile Overlay Menu ─────────────────────────────────── */
.navbar__mobile {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-sticky) - 1);
  background: #ffffff;
  display: flex;
  flex-direction: column;
  padding: var(--space-6) var(--container-px) var(--space-10);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  overflow-y: auto;
  border-right: 4px solid var(--color-primary);
}
.navbar__mobile.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Brand block at top of mobile menu */
.navbar__mobile-header {
  padding: var(--space-4) 0 var(--space-6);
  border-bottom: 1px solid rgba(15,23,42,0.07);
  margin-bottom: var(--space-4);
}
.navbar__mobile-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}
.navbar__mobile-brand-img {
  height: 56px;
  width: auto;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(30,58,138,0.10);
}

.navbar__mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  list-style: none;
}

.navbar__mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-body);
  text-decoration: none;
  border-bottom: 1px solid rgba(15,23,42,0.07);
  transition: all var(--transition-fast);
  opacity: 0;
  transform: translateX(-20px);
}
.navbar__mobile.is-open .navbar__mobile-link {
  opacity: 1;
  transform: translateX(0);
}
/* Stagger delays for mobile links */
.navbar__mobile.is-open .navbar__mobile-link:nth-child(1)  { transition-delay: 0.05s; }
.navbar__mobile.is-open .navbar__mobile-link:nth-child(2)  { transition-delay: 0.10s; }
.navbar__mobile.is-open .navbar__mobile-link:nth-child(3)  { transition-delay: 0.15s; }
.navbar__mobile.is-open .navbar__mobile-link:nth-child(4)  { transition-delay: 0.20s; }
.navbar__mobile.is-open .navbar__mobile-link:nth-child(5)  { transition-delay: 0.25s; }
.navbar__mobile.is-open .navbar__mobile-link:nth-child(6)  { transition-delay: 0.30s; }
.navbar__mobile.is-open .navbar__mobile-link:nth-child(7)  { transition-delay: 0.35s; }
.navbar__mobile.is-open .navbar__mobile-link:nth-child(8)  { transition-delay: 0.40s; }
.navbar__mobile.is-open .navbar__mobile-link:nth-child(9)  { transition-delay: 0.45s; }
.navbar__mobile.is-open .navbar__mobile-link:nth-child(10) { transition-delay: 0.50s; }
.navbar__mobile.is-open .navbar__mobile-link:nth-child(11) { transition-delay: 0.55s; }

.navbar__mobile-link:hover { color: var(--color-primary); border-color: rgba(30,58,138,0.15); }
.navbar__mobile-link:hover .mobile-link-arrow { transform: translateX(4px); color: var(--color-primary); }
.mobile-link-arrow { transition: transform var(--transition-fast); color: var(--color-text-muted); }
[dir="rtl"] .navbar__mobile-link { transform: translateX(20px); }
[dir="rtl"] .navbar__mobile.is-open .navbar__mobile-link { transform: translateX(0); }

.navbar__mobile-bottom {
  margin-top: auto;
  padding-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.navbar__mobile-cta {
  width: 100%;
  padding: 1rem;
  font-size: var(--text-base);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1199px) {
  .navbar__nav { gap: 0; }
  .navbar__nav-link { padding: var(--space-2); font-size: var(--text-xs); }
}

@media (max-width: 1023px) {
  .navbar__nav,
  .navbar__cta { display: none; }
  .navbar__hamburger { display: flex; }
}

@media (max-width: 480px) {
  .navbar__logo-subtitle { display: none; }
  .navbar__logo-cnc { font-size: var(--text-lg); }
}