.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-h);
  z-index: var(--z-header);
  transition: all var(--dur-base) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: hsla(228, 30%, 6%, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--clr-glass-border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: var(--fw-extrabold);
  letter-spacing: -0.03em;
  color: #ffffff;
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-secondary) 100%);
  border-radius: var(--radius-md);
  box-shadow: 0 0 15px var(--clr-primary-glow);
}

.logo-badge svg {
  width: 22px;
  height: 22px;
  fill: #050b14;
}

.header-nav {
  display: none;
}

@media (min-width: 992px) {
  .header-nav {
    display: flex;
    align-items: center;
  }
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

@media (min-width: 992px) and (max-width: 1160px) {
  .nav-list {
    gap: var(--sp-4);
  }
}

.nav-item {
  position: relative;
}

.nav-item > a,
.nav-link {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--clr-text-muted);
  transition: color var(--dur-fast) ease;
  position: relative;
  padding: var(--sp-2) 0;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

@media (min-width: 992px) and (max-width: 1160px) {
  .nav-item > a,
  .nav-link {
    font-size: 13.5px;
  }
}

.nav-item > a:hover,
.nav-link:hover,
.nav-item.has-dropdown:hover > a,
.nav-item.has-dropdown:hover > .nav-link {
  color: #ffffff;
}

.nav-item > a::after,
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--clr-primary);
  box-shadow: 0 0 8px var(--clr-primary);
  transition: width var(--dur-base) var(--ease-out);
}

.nav-item > a:hover::after,
.nav-link:hover::after,
.nav-item.has-dropdown:hover > a::after,
.nav-item.has-dropdown:hover > .nav-link::after,
.nav-item.active > a::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active,
.nav-item.active > a {
  color: #ffffff;
  font-weight: var(--fw-semibold);
}

/* Dropdown Arrow & Menu Desktop */
.dropdown-chevron {
  transition: transform var(--dur-base) var(--ease-out), color var(--dur-fast) ease;
  color: var(--clr-text-dim);
}

.nav-item.has-dropdown:hover .dropdown-chevron,
.nav-item.has-dropdown:focus-within .dropdown-chevron,
.nav-item.has-dropdown.open .dropdown-chevron {
  transform: rotate(180deg);
  color: var(--clr-primary);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: 320px;
  background: hsla(228, 32%, 7%, 0.98);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid var(--clr-glass-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 45px -8px rgba(0, 0, 0, 0.8), 0 0 25px rgba(26, 209, 255, 0.1);
  padding: var(--sp-3);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out), visibility var(--dur-base);
  z-index: 250;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

/* Invisible hover bridge */
.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -14px;
  left: 0;
  right: 0;
  height: 14px;
}

.nav-item.has-dropdown:hover .dropdown-menu,
.nav-item.has-dropdown:focus-within .dropdown-menu,
.nav-item.has-dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-2) var(--sp-3);
  border-bottom: 1px solid hsla(228, 20%, 16%, 0.7);
  margin-bottom: 4px;
}

.dropdown-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: hsla(195, 100%, 55%, 0.15);
  color: var(--clr-primary);
  border: 1px solid hsla(195, 100%, 55%, 0.3);
}

.dropdown-subtext {
  font-size: 11px;
  color: var(--clr-text-dim);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-md);
  color: var(--clr-text);
  text-decoration: none;
  transition: all var(--dur-fast) ease;
  border: 1px solid transparent;
  position: relative;
}

.dropdown-item::after {
  display: none !important;
}

.dropdown-item:hover,
.dropdown-item:focus {
  background: hsla(228, 25%, 15%, 0.9);
  border-color: var(--clr-glass-border-hover);
  color: #ffffff;
  transform: translateX(3px);
}

.dropdown-item.active {
  background: hsla(195, 100%, 55%, 0.12);
  border-color: hsla(195, 100%, 55%, 0.4);
  color: var(--clr-primary);
}

.dropdown-item.active .dropdown-item-title {
  color: var(--clr-primary);
}

.dropdown-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: hsla(228, 22%, 14%, 0.9);
  color: var(--clr-primary);
  border: 1px solid var(--clr-glass-border);
  flex-shrink: 0;
  transition: all var(--dur-fast) ease;
}

.dropdown-item:hover .dropdown-item-icon {
  background: var(--clr-primary);
  color: #050b14;
  border-color: var(--clr-primary);
  box-shadow: 0 0 12px var(--clr-primary-glow);
}

.dropdown-item-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.dropdown-item-title {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  line-height: 1.25;
  color: var(--clr-text);
  display: flex;
  align-items: center;
  gap: 6px;
}

.dropdown-item:hover .dropdown-item-title {
  color: #ffffff;
}

.dropdown-item-desc {
  font-size: 11px;
  color: var(--clr-text-muted);
  line-height: 1.3;
}

.dropdown-divider {
  height: 1px;
  background: hsla(228, 20%, 18%, 0.6);
  margin: 4px 0;
}

.dropdown-item-featured {
  background: linear-gradient(135deg, hsla(195, 100%, 55%, 0.08) 0%, hsla(265, 85%, 66%, 0.08) 100%);
  border: 1px solid hsla(195, 100%, 55%, 0.25);
}

.dropdown-item-featured:hover {
  background: linear-gradient(135deg, hsla(195, 100%, 55%, 0.16) 0%, hsla(265, 85%, 66%, 0.16) 100%);
  border-color: var(--clr-primary);
}

.featured-icon {
  background: hsla(195, 100%, 55%, 0.2);
  color: var(--clr-primary);
}

.badge-free {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: var(--fw-bold);
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--clr-success);
  color: #050b14;
  letter-spacing: 0.05em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-md);
  background: hsla(228, 25%, 15%, 0.5);
  border: 1px solid var(--clr-glass-border);
}

@media (min-width: 992px) {
  .hamburger {
    display: none;
  }
}

.hamburger span {
  width: 100%;
  height: 2px;
  background: #ffffff;
  border-radius: 2px;
  transition: all var(--dur-base) var(--ease-out);
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: var(--header-h);
  right: 0;
  width: 100%;
  max-width: 360px;
  height: calc(100vh - var(--header-h));
  background: hsla(228, 30%, 7%, 0.98);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-left: 1px solid var(--clr-glass-border);
  padding: var(--sp-6) var(--sp-6) var(--sp-8);
  transform: translateX(100%);
  transition: transform var(--dur-base) var(--ease-out);
  z-index: var(--z-header);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.6);
  overflow-y: auto;
}

.mobile-drawer.open {
  transform: translateX(0);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.mobile-nav-item > a {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--clr-text);
  display: block;
  padding: var(--sp-2) 0;
  border-bottom: 1px solid hsla(228, 20%, 15%, 0.6);
  transition: color var(--dur-fast) ease;
}

.mobile-nav-item > a:hover,
.mobile-nav-item > a.active {
  color: var(--clr-primary);
}

/* Mobile Submenu Accordion */
.mobile-dropdown {
  position: relative;
  border-bottom: 1px solid hsla(228, 20%, 15%, 0.6);
}

.mobile-dropdown-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--clr-text);
  background: none;
  border: none;
  padding: var(--sp-2) 0;
  cursor: pointer;
  text-align: left;
  transition: color var(--dur-fast) ease;
}

.mobile-dropdown-toggle:hover,
.mobile-dropdown-toggle[aria-expanded="true"],
.mobile-dropdown.open .mobile-dropdown-toggle {
  color: var(--clr-primary);
}

.mobile-chevron {
  transition: transform var(--dur-base) var(--ease-out);
  stroke: currentColor;
}

.mobile-dropdown-toggle[aria-expanded="true"] .mobile-chevron,
.mobile-dropdown.open .mobile-chevron {
  transform: rotate(180deg);
}

.mobile-subnav-list {
  display: none;
  flex-direction: column;
  gap: var(--sp-2);
  padding: var(--sp-2) 0 var(--sp-3) var(--sp-4);
  border-left: 2px solid hsla(195, 100%, 55%, 0.35);
  margin: var(--sp-1) 0 var(--sp-2) var(--sp-2);
}

.mobile-subnav-list.open,
.mobile-dropdown.open .mobile-subnav-list {
  display: flex;
}

.mobile-subnav-list li a {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--clr-text-muted);
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color var(--dur-fast) ease;
}

.mobile-subnav-list li a:hover,
.mobile-subnav-list li a.active {
  color: var(--clr-primary);
}

.mobile-drawer-footer {
  margin-top: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding-top: var(--sp-4);
  border-top: 1px solid hsla(228, 20%, 15%, 0.6);
}