/* Sticky Header & Navbar */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header.header-scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  background-color: rgba(255, 255, 255, 0.98);
}

.header.header-scrolled .navbar {
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
}

.header.header-scrolled .logo-img {
  height: 50px;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-img {
  height: 68px;
  width: auto;
  display: block;
  transition: height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Nav Menu Styles */
.nav-menu-wrapper {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dark);
  transition: var(--transition-smooth);
  position: relative;
  padding: 0.25rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-blue);
  transition: var(--transition-smooth);
}

.nav-link:hover {
  color: var(--primary-blue);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--primary-blue);
}

/* Hamburger toggle menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1100;
}

.nav-toggle:focus {
  outline: none;
}

.hamburger-line {
  width: 100%;
  height: 2.5px;
  background-color: var(--text-dark);
  border-radius: 4px;
  transition: var(--transition-smooth);
  transform-origin: center;
}

/* Hamburger Active State */
.nav-toggle.active .hamburger-line:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scale(0);
}

.nav-toggle.active .hamburger-line:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}