/* Navbar scroll state */
#navbar {
  transition: background 0.3s ease, padding 0.3s ease, box-shadow 0.3s ease;
}
#navbar.scrolled {
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.4);
}

/* Dropdown menus — always in DOM, shown via opacity/pointer-events */
.dropdown-menu {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px) scale(0.97);
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.nav-dropdown.active .dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

/* Rotate chevron when dropdown active */
.nav-dropdown.active .dropdown-chevron {
  transform: rotate(180deg);
}

/* Mobile menu */
#mobile-menu {
  display: none;
  transition: opacity 0.2s ease;
}
#mobile-menu.open {
  display: flex;
}

/* Smooth page links */
a {
  text-decoration: none;
}

/* Iframe responsive helper */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
}
.video-wrapper iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
}