:root {
  --header-bg: #020202;
  --text-color: #f2f2f2;
  --hover-color: #5182EF;
  --border-color: rgba(255, 255, 255, 0.1);
}

.main-header {
  background-color: var(--header-bg);
  color: var(--text-color);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 9999;
  border-bottom: 1px solid var(--border-color);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  max-width: 1400px;
  margin: auto;
}

.logo img {
  height: 40px;
  width: auto;
}

.logo-mobile {
  display: none;
}

.logo-desktop {
  display: block;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.nav-links li {
  position: relative;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  display: inline-block;
  transition: all 0.3s ease;
}

.nav-links a:hover {
  background-color: var(--hover-color);
  color: #fff;
}

/* Dropdown */
.dropdown {
  position: relative;
}
.dropdown-menu {
  display: none;
  position: absolute;
  background-color: #111;
  padding: 0.5rem 0;
  border-radius: 8px;
  top: 100%;
  list-style: none;
  margin: 0;
  width: 200px;
  z-index: 1000;
}
.dropdown:hover .dropdown-menu {
  display: block;
}
.dropdown-menu li a {
  display: block;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  transition: background 0.3s;
}
.dropdown-menu li a:hover {
  background-color: var(--hover-color);
  color: #fff;
}

/* Hamburger */
.hamburger {
  display: none;
  font-size: 2rem;
  color: var(--text-color);
  cursor: pointer;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  flex-direction: column;
  background-color: #111;
  padding: 1rem 2rem;
  position: absolute;
  top: 70px;
  width: 100%;
  left: 0;
}

.mobile-menu a {
  text-decoration: none;
  color: var(--text-color);
  padding: 0.6rem 0;
  transition: background 0.3s;
  display: block;
}

.mobile-menu a:hover {
  background: var(--hover-color);
  color: #fff;
  border-radius: 6px;
}

/* Submenu (mobile) */
.mobile-submenu {
  display: none;
  flex-direction: column;
  padding-left: 1rem;
  gap: 0.4rem;
}
.mobile-submenu.open {
  display: flex;
}

.mobile-menu.active {
  display: flex;
}

/* Close Button */
.close-btn {
  align-self: flex-end;
  font-size: 2rem;
  color: #f2f2f2;
  cursor: pointer;
  margin-bottom: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    display: none;
  }

  .hamburger {
    display: block;
  }

  .logo-desktop {
    display: none;
  }

  .logo-mobile {
    display: block;
    height: 32px;
  }
}