/* Navigation container */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 9999;
  background: #333;
}

/* Navigation list */
.nav-links {
  list-style: none;
  display: flex;
  justify-content: center;
  margin: 0;
  padding: 0;
}

/* Navigation items */
.nav-links li {
  position: relative;
}

/* Navigation links */
.nav-links li a {
  display: block;
  padding: 10px 18px; /* tighter height */
  color: #fff;
  text-decoration: none;
  font-size: 0.9em;
  letter-spacing: 0.5px;
  transition: background 0.3s, color 0.3s;
  white-space: nowrap;
}

/* Hover and active states */
.nav-links li a:hover,
.nav-links li a.active {
  background: #B20A2F;
  color: #fff;
}

/* Submenu */
.submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #222;
  min-width: 180px;
  border-radius: 0 0 6px 6px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  z-index: 1001;
}

.submenu li a {
  padding: 10px 20px;
  font-size: 0.85em;
  white-space: nowrap;
}

.submenu li a:hover {
  background: #01527C;
}

/* Show submenu on hover (desktop only) */
@media (min-width: 769px) {
  .nav-links li:hover .submenu {
    display: block;
  }
}

/* Mobile navigation */
.hamburger {
  display: none;
  font-size: 26px;
  color: white;
  cursor: pointer;
  padding: 10px 18px;
  text-align: right;
}

@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    background: #333;
    width: 100%;
  }

  .nav-links.show {
    display: flex;
  }

  .nav-links li {
    border-top: 1px solid #444;
  }

  .nav-links li a {
    padding: 14px 20px;
    font-size: 1em;
  }
}