.header {
  background: var(--background);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px var(--shadow);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.25rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-item {
  position: relative;
}

.nav-link {
  padding: 8px 16px;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  border-radius: 6px;
  transition: all 0.2s ease;
  display: block;
}

.nav-link:hover {
  background: var(--surface);
  color: var(--primary);
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 16px;
  color: var(--text);
  font-weight: 500;
  border-radius: 6px;
  transition: all 0.2s ease;
  font-size: 16px;
}

.dropdown-toggle:hover {
  background: var(--surface);
  color: var(--primary);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 10px 30px var(--shadow);
  min-width: 220px;
  padding: 8px;
  margin-top: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

.dropdown:hover .dropdown-menu,
.dropdown.active .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: 10px 16px;
  color: var(--text);
  text-decoration: none;
  border-radius: 6px;
  transition: all 0.2s ease;
  font-size: 15px;
}

.dropdown-item:hover {
  background: var(--surface);
  color: var(--primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all 0.3s ease;
}

@media (max-width: 768px) {
  .nav-menu,
  .header-actions {
    display: none;
  }

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

  .nav-menu.active,
  .header-actions.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--border);
    padding: 16px;
    gap: 8px;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    margin-left: 16px;
  }
}