/* ============================================
   Navigation — Sticky header
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  z-index: 1000;
  transition: all var(--transition-base);
}

.navbar.is-scrolled {
  background: rgba(255, 255, 255, 0.98);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.navbar__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Logo */
.navbar__logo {
  display: flex;
  align-items: center;
}

.navbar__logo-img {
  height: 64px;
  width: auto;
  object-fit: contain;
  transition: opacity var(--transition-base);
}

.navbar__logo:hover .navbar__logo-img {
  opacity: 0.85;
}

/* Nav menu */
.navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.navbar__link {
  position: relative;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  padding: var(--space-2) 0;
}

.navbar__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent-orange);
  transition: width var(--transition-base);
}

.navbar__link:hover,
.navbar__link.is-active {
  color: var(--industrial-blue);
}

.navbar__link:hover::after,
.navbar__link.is-active::after {
  width: 100%;
}

.navbar__cta {
  padding: 10px 24px;
  font-size: 0.875rem;
}

/* Mobile toggle */
.navbar__toggle {
  display: none;
  width: 44px;
  height: 44px;
  position: relative;
  z-index: 1001;
}

.navbar__toggle span {
  display: block;
  position: absolute;
  left: 10px;
  width: 24px;
  height: 2px;
  background: var(--industrial-blue-dark);
  transition: all var(--transition-base);
}

.navbar__toggle span:nth-child(1) { top: 16px; }
.navbar__toggle span:nth-child(2) { top: 22px; }
.navbar__toggle span:nth-child(3) { top: 28px; }

.navbar__toggle.is-open span:nth-child(1) {
  top: 22px;
  transform: rotate(45deg);
}
.navbar__toggle.is-open span:nth-child(2) {
  opacity: 0;
}
.navbar__toggle.is-open span:nth-child(3) {
  top: 22px;
  transform: rotate(-45deg);
}

/* ===== Mobile ===== */
@media (max-width: 960px) {
  .navbar__toggle {
    display: block;
  }

  .navbar__menu {
    position: fixed;
    top: 0;
    right: 0;
    width: min(360px, 85vw);
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: calc(var(--nav-height) + var(--space-8)) var(--space-8) var(--space-8);
    gap: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-xl);
    border-left: 1px solid var(--border);
  }

  .navbar__menu.is-open {
    transform: translateX(0);
  }

  .navbar__link {
    font-size: 1.125rem;
    width: 100%;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--border);
  }

  .navbar__cta {
    margin-top: var(--space-4);
    width: 100%;
  }

  /* Backdrop when menu open */
  body.nav-open::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(20, 37, 56, 0.4);
    z-index: 999;
    backdrop-filter: blur(2px);
  }
}