/* ════════════════════════════════════════════════════════
   BRITOL GROUP — Navigation Bar & Mobile Menu
   ════════════════════════════════════════════════════════ */

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, .05);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo img {
  height: 50px;
  width: auto;
  border-radius: 8px;
}

.nav-logo span {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--blue-700);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 8px 18px;
  border-radius: 30px;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: .92rem;
  letter-spacing: .3px;
  color: var(--gray-600);
  position: relative;
  transition: var(--transition);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 3px;
  background: var(--blue-500);
  border-radius: 10px;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--blue-700);
  background: var(--blue-50);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  z-index: 1002;
}

.hamburger span {
  width: 26px;
  height: 3px;
  background: var(--gray-700);
  border-radius: 10px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Nav Overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .45);
  z-index: 1000;
  opacity: 0;
  transition: opacity var(--transition);
}

.nav-overlay.active {
  display: block;
  opacity: 1;
}