header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: black;
  padding: 1rem;
}

.logo {
  height: 50px;
}

.tagline {
  color: red;
  font-weight: bold;
  font-size: 1.2rem;
  animation: flash 1s infinite alternate;
}

@keyframes flash {
  0% { opacity: 1; }
  100% { opacity: 0.3; }
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  justify-content: center;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: 600;
}

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: rgba(0,0,0,0.9);
  min-width: 160px;
  z-index: 1;
}

.dropdown-content a {
  color: white;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.dropdown:hover .dropdown-content {
  display: block;
}