#header {
  position: sticky;
  top: 0;
  width: 100%;
  background: linear-gradient(135deg,#1A4D8F,#5BB0FF);
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
  z-index: 1000;
  transition: all 0.3s ease;
  font-family: 'Poppins', sans-serif;
}
.header-container {
  max-width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}
.logo {
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: 1px;
  transition: transform 0.3s;
}
.logo:hover { transform: scale(1.1); }
.nav-links {
  display: flex;
  gap: 1.8rem;
  list-style: none;
}
.nav-links li {
  position: relative;
}
.nav-links li a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem 0;
  transition: color 0.3s;
}
.nav-links li a:hover { color: #FFD700; }
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: #1A4D8F;
  display: none;
  flex-direction: column;
  min-width: 180px;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}
.dropdown-menu li a {
  padding: 0.8rem 1rem;
  display: block;
  color: #fff;
  transition: background 0.3s;
}
.dropdown-menu li a:hover { background: #5BB0FF; }
.nav-links li.dropdown:hover .dropdown-menu { display: flex; }
.menu-btn {
  display: none;
  font-size: 2rem;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
}
/* Mobile */
@media (max-width: 991px) {
  .nav-links { display: none; flex-direction: column; background: #1A4D8F; position: absolute; top: 70px; right: 0; width: 250px; padding: 1rem; border-radius:0 0 0 10px; }
  .nav-links.show { display: flex; }
  .menu-btn { display: block; }
  .dropdown-menu { position: relative; top:0; left:0; border-radius:0; }
  .nav-links li.dropdown:hover .dropdown-menu { display:none; }
}