/* Glassmorphism effect */
.glass {
  background: rgba(59, 130, 246, 0.2); /* bluish tint */
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* Hamburger menu animation */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  cursor: pointer;
}

.hamburger .bar {
  height: 3px;
  width: 100%;
  background-color: #1f2937; /* Tailwind gray-800 */
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.open .bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open .bar:nth-child(2) {
  opacity: 0;
}

.hamburger.open .bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu transition */
.menu-transition {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.4s ease;
}

.menu-transition.menu-open {
  max-height: 500px; /* large enough to fit menu */
  opacity: 1;
}

.active {
  color: #2563eb; /* Tailwind blue-600 */
  font-weight: 600; /* font-semibold */
}